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Journal articles on the topic 'Paper Optical properties'

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Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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1

Hägglund, Håkan, Ole Norberg, Magnus Neuman, and Per Edström. "Dependence between paper properties and spectral optical response of uncoated paper." Nordic Pulp & Paper Research Journal 27, no. 2 (May 1, 2012): 440–44. http://dx.doi.org/10.3183/npprj-2012-27-02-p440-444.

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Abstract This paper presents a method to describe, with good accuracy, the relation between variations in paper properties and variations of the spectral optical response of an uncoated paper. The dependence between density, filler content, grammage, and the spectral optical response is characterized by a multivariate model. The model is based on large-scale measurements data on a set of paper samples that have been produced with different values of grammage, density and filler content, representing the variations within a normal 80 g/m² uncoated paper. From the optical measurements the light scattering (s) and light absorption (k) coefficients have been estimated according to the Kubelka-Munk theory. The results from this study will give valuable input to optical modeling activities, where the optical variations are predicted from measured small-scale variations in underlying paper properties. The variations in the paper properties can be used to model the light scattering coefficient, s, but there were too small variations in the light absorption coefficient, k, to find any significant dependence to the paper properties for the samples studied in this work. Furthermore, linear models give sufficient accuracy in the intervals studied. Additional findings from this study are the different effects of wet-pressing and calendering on the light scattering coefficient.

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2

Ismailov, I. I., Kh A. Babakhanova, A. A. Sadriddinov, M. A. Babahanova, and D. Sh Saidova. "Surface and optical properties of calcium carbonate paper." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 57, no. 4 (December 3, 2021): 472–79. http://dx.doi.org/10.29235/1561-8331-2021-57-4-472-479.

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The article investigates the surface and optical properties of calcium carbonate paper obtained at the UzbekChinese enterprise Fergana stone paper company (Uzbekistan), in order to identify the possibility of their use at printing enterprises for printing multicolor products using traditional printing methods. According to the results of a quantitative assessment of the surface quality by the indirect Beck method, we can say that paper sample 1 has a smoothness like coated paper (750–1500 s), paper samples 2 and 3 – like calendered paper, so that these paper samples can be recommended for prints with increased quality requirements. Smaller values of roughness Ra and small depressions, expressed by darkening in the topographic AFM images, characterized sufficient homogeneity and density of the structure. It was also revealed that the surface of the paper samples has a high ability to specularly reflect the incident light, since the percentage of surface reflection is similar to that of coated papers. Samples of paper have a whiteness of about 90 % and do not have a tint, since the difference between the maximum and minimum values of the reflection coefficients on a white stack is not more than 10 %. The tested paper samples can be recommended without restrictions for double-sided printing, since the opacity index is more than 92 %.

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3

YILMAZ, UFUK, AHMET TUTUŞ, and SİNAN SÖNMEZ. "FIBER CLASSIFICATION, PHYSICAL AND OPTICAL PROPERTIES OF RECYCLED PAPER." Cellulose Chemistry and Technology 55, no. 5-6 (June 30, 2021): 689–96. http://dx.doi.org/10.35812/cellulosechemtechnol.2021.55.58.

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"In this study, reference papers prepared in accordance with the INGEDE 11p standard (International Association of the Deinking Industry) were recycled three times. Initially, reference papers were subjected to wetting, pulping, storage, deinking, dispersing and bleaching processes. At the end of these processes, test papers were produced and their optical characteristics were examined. The brightness value of writing papers (of 80 grams) was determined to be of 86%, following the TS 11610:2017 standard. In order to bring the brightness of the produced laboratory test papers to the specified value, double-stage bleaching was applied: with 0.4% FAS in the first stage and H2O2 in the second stage. The physical and optical properties of the test papers that reached the standard brightness value were determined. Overall, the final products were recycled three times. At the end of the third recycling stage, changes in paper fibers were examined. As a result, it was observed that the breaking, tear and burst resistance of the obtained papers gradually decreased at the end of each recycling stage. In addition, because of the narrowing fiber surface, it was determined that the opacity value of the paper decreased at the end of each recycling stage. According to the fiber classification results, the fiber size shrank at the end of the third recycling stage and a large part of the fibers remained in the 200 mesh. Paper fibers are recycled 3.6 times in Europe. This rate is approximately 2.4 times higher than the world average. This study offers interesting results regarding cellulose recycling, which has gained great importance in recent years. "

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4

Olejnik, Konrad, Paweł Pełczyński, Monika Bogucka, and Agnieszka Głowacka. "Optical measurement of the hydrophobic properties of paper products." Measurement 115 (February 2018): 52–63. http://dx.doi.org/10.1016/j.measurement.2017.10.020.

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5

KO, SEONGHYUK, PAUL D. FLEMING, MARGARET JOYCE, and PNINA ARI-GUR. "Optical and photocatalytic properties of photoactive paper with polycrystalline TiO2 nanopigment for optimal product design." TAPPI Journal 11, no. 5 (June 1, 2012): 33–38. http://dx.doi.org/10.32964/tj11.5.33.

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We investigated the effect of the crystalline phases of titanium dioxide nanopigment to optimize the optical properties and photocatalytic activity for synthesizing a photoactive paper. Six different ratios of anatase to rutile were prepared. Phase change and particle size were characterized using X-ray diffraction and transmission electron microscopy. Optical properties including opacity and brightness were tested. Photocatalytic activity was evaluated by measuring toluene decomposition, using gas chromatography. A specific ratio between two different crystallites of titanium dioxide showed relatively better optical and photoactive properties. The optimal anatase-to-rutile ratio was found to be 0.52:0.48.

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6

Hägglund, Håkan, Ole Norberg, and Per Edström. "Prediction of optical variations in paper from high resolution measurements of paper properties." Nordic Pulp & Paper Research Journal 28, no. 4 (December 1, 2013): 596–601. http://dx.doi.org/10.3183/npprj-2013-28-04-p596-601.

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7

Kovalchuk, V. V. "Optical properties of clusters." Journal of Physics and Electronics 26, no. 1 (December 3, 2018): 29–34. http://dx.doi.org/10.15421/331804.

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In this paper, we discuss in detail the theoretical results obtained with using the local functional density method in parameteric approximation of silicon clusters. One of the main conclusions is that the comparison between theory and experiments shows the possibility of different radiative channels for the recombination in porous silicon.

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8

Zhen, Zhao Hui, and Zheng Shun Wang. "Influence of Coating Binder Migration on Coated Paper Optical Properties." Advanced Materials Research 746 (August 2013): 114–17. http://dx.doi.org/10.4028/www.scientific.net/amr.746.114.

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The coating binder migration and concentration in z-direction of coating layer especially in coating surface influence coated paper optical properties. The results showed that with the increase of coating surface binder migration, the calendaring gloss decreases, the printing gloss and the printing optical density increases. The calendaring gloss and printing gloss, compared to the influence of binder distribution in coating layer,seemed more subject to coating surface binder concentration. Binder in the coating surface concentration and distribution in z-direction almost did not affect the whiteness of coated paper.

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9

Liu, Hongbin, He Shi, Yating Wang, Wei Wu, and Yonghao Ni. "Interactions of Lignin with Optical Brightening Agents and Their Effect on Paper Optical Properties." Industrial & Engineering Chemistry Research 53, no. 8 (February 13, 2014): 3091–96. http://dx.doi.org/10.1021/ie4032082.

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10

Liu, Ying Ping, Yao Yan, and Fang Qiao. "Research and Application of Recycled Paper." Applied Mechanics and Materials 513-517 (February 2014): 129–33. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.129.

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In this paper we analysed application status and reasons of recycled paper, researched physical properties, mechanical properties, optical properties, chemical properties and printing adaptability of recycled paper and tested the important indexes . The test data was compared with ordinary offset paper and there is little difference. The result shows recycled paper can be wildly used for offices, book, paper toys etc.

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11

Katsura, Toru, and Koji Murakami. "How filler distribution affects paper properties. 3 The influence of different fillers on optical and mechanical properties of paper." JAPAN TAPPI JOURNAL 40, no. 12 (1986): 1145–50. http://dx.doi.org/10.2524/jtappij.40.1145.

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12

Ramlan, Nurul Mutmainnah, Arini Qurrata A'yun, Radha Hartina Putri, Siti Fatimah, Isnaeni, and Dahlang Tahir. "Analysis Optical Properties of Carbon Dots from Paper Flowers (Bougainvillea spectabilis)." Omega: Jurnal Fisika dan Pendidikan Fisika 4, no. 2 (November 30, 2018): 30. http://dx.doi.org/10.31758/omegajphysphyseduc.v4i2.30.

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Synthesized carbon dots (CDs) from paper flowers (Bougainvillea spectabilis) was performed by microwave assisted. CDs were characterized by ultraviolet visible light (UV-Vis), photoluminescence (PL) and time resolved luminescence (TRPL). PL data shows wavelength intensity of CDs paper flowers at 493 nm for 3.9 ns and 512 nm for 4.2 ns respectively for purple and white paper flowers that excited at 420 nm. The absorbance for CDs white paper flower at 262 nm and 350 nm, while CDs purple flower paper at 260 nm, 324 nm, and 530 nm. CDs from paper flower shows excellent optical properties. So, it is mean that method applied to this experiment effectively, cheap and eco-friendly for synthesis CDs from paper flower.

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13

Yasunas, Aleksandr, Natalia Kovalchyk, Olga Komar, Uriy Radzionay, Dmitry Kotov, and Vladimir Shiripov. "Paper No P34: Optical Properties and Structure of HDPCVD Silicon Dioxide." SID Symposium Digest of Technical Papers 44 (September 2013): 115–18. http://dx.doi.org/10.1002/sdtp.44.

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14

Impey, C. D., E. J. Hooper, C. B. Foltz, and P. C. Hewett. "The Radio and Optical Properties of Quasars." Symposium - International Astronomical Union 175 (1996): 252–53. http://dx.doi.org/10.1017/s0074180900080700.

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The relationship between the radio and optical emission of quasars was first studied using radio-selected objects, which generally had high radio luminosities due to the relatively low sensitivity limits of the surveys. More recently, radio follow-up observations have been made of optical surveys surveys in other wavebands. Taken together, the two survey methods have detected quasars with a range of over 6 orders of magnitude in radio luminosity. We report here new observations with the Very Large Array (VLA) of 103 quasars from the Large Bright Quasar Survey (LBQS), with absolute magnitudes in the range −25 < MB < −23 and redshifts in the range 0.2 < z < 1.1. This can be combined with our previous LBQS observations (Paper I, Paper II) to yield 359 quasars, the largest sample of sensitive radio observations of optically-selected quasars in a single survey.

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15

Abdulridha, Ghufran Razzaq, and Zaid A. Hasan. "Study the Effect Doping (Al2O3) Nanoparticles on Optical Properties for PVA Polymer." NeuroQuantology 20, no. 3 (March 26, 2022): 231–36. http://dx.doi.org/10.14704/nq.2022.20.3.nq22065.

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Polyvinyl alcohol polymer is a harmless substance of great importance to the medical and optical fields. In this paper, we saturated PVA with Al2O3 nanoparticles with different weights 0, 0.01, 0.03 and 0.05% at a temperature of 25oC and 1 atm pressure, The optical constants had been characterized by measuring the transmittance in the visible spectrum, the ultraviolet field, the absorption, and the rest of the optical properties such as the damping and refraction coefficient, in addition to the real and imaginary part of the dielectric constant and finally the optical conductivity of the samples. We observed that the band gap width (Eg) decrease when we increase the Al2O3 (doping ratio).

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16

Zhang, Kai, Chao Jun Wu, and Jia Chuan Chen. "Some Properties and Detection Methods of Paper Sludge." Advanced Materials Research 560-561 (August 2012): 52–56. http://dx.doi.org/10.4028/www.scientific.net/amr.560-561.52.

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Some properties of paper sludge were analyzed, including water content, organic material content, pH value, ﬁber content, ash content ,C, H, S, N content and metal content of sludge in three sedimentation tanks.Besides,COD,SS, sludge concentration were analyzed and optical microscope photoes of sludge were got.The results showed that water content was high, organic material content was high, pH value of three sludges was alkalescent, metal elements were varied, lots of bacteria in wet sludge. From the first tank to the third one,COD and SS are gradually diminishing The research of sludge’s properties may be helpful to sludge treatment.

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17

Anjos, Ofélia, António J. A. Santos, Rogério Simões, and Helena Pereira. "Morphological, mechanical, and optical properties of cypress papers." Holzforschung 68, no. 8 (December 1, 2014): 867–74. http://dx.doi.org/10.1515/hf-2013-0125.

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Abstract The pulping properties of cypress species are not known and the present paper aims to filling this gap. Namely, Cupressus lusitanica Mill., C. sempervirens L. and C. arizonica Greene have been submitted to kraft pulping and the pulp properties are compared with those of Pinus pinaster Aiton. and P. sylvestris Watereri as references. Schopper Riegler degree, density, Bekk’s smoothness, tensile index, tear index, burst index, stretch, dry zero-span strength, wet zero-span strength, brightness, opacity and light scattering coefficient have been tested. The pulp yields and delignification degrees of cypress woods were lower than those of the pine references. Fibre length, width and coarseness were statistically different between pines and cypress species and C. sempervirens pulps have corresponding data close to those of pine species. Cypress pulps can be refined much faster than pine pulps. The papers sheets of cypress fibres have, in general, lower mechanical performance than those of pine fibres. Papers from C. arizonica and C. lusitanica are similar and C. sempervirens has intermediate properties being between the other cypress and pine species. However, cypress fibres are relatively short, flexible and collapsible and can be refined with low energy demand, and thus could be incorporated into papers resulting in products with better light scattering and smoothness.

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18

Kovalchuk, V., L. Kovalenko, and M. Smorgh. "Nanometrology: optical properties of Si-nanoclusters." Metrology and instruments, no. 2 (May 3, 2019): 52–56. http://dx.doi.org/10.33955/2307-2180(2)2019.52-56.

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In this paper, we have discussed in detail the theoretical results using local functional density method in parameterized modification of silicon clusters. One of the main conclusions is that the comparison between theory and experiments shows the possibility of different radiative channels for the recombination in porous silicon. Research results directly affect nanometrology.

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19

Kim, Bong-Yong, Akira Isogai, Fumihiko Onabe, and Makoto Usuda. "Evaluation of deterioration degrees of book paper by measurement of optical properties." JAPAN TAPPI JOURNAL 44, no. 10 (1990): 1126–30. http://dx.doi.org/10.2524/jtappij.44.1126.

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20

Prajzler, V., P. Hyps, R. Mastera, and P. Nekvindova. "Properties of Siloxane Based Optical Waveguides Deposited on Transparent Paper and Foil." Radioengineering 25, no. 2 (April 14, 2016): 230–35. http://dx.doi.org/10.13164/re.2016.0230.

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21

Huber, Patrick, Laurent Lyannaz, and Bruno Carré. "Specks masking by the coating layer in coated paper made from deinked pulp." Nordic Pulp & Paper Research Journal 27, no. 2 (May 1, 2012): 466–71. http://dx.doi.org/10.3183/npprj-2012-27-02-p466-471.

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Abstract Production of lightweight coated paper (LWC) utilises more and more deinked pulp (DIP), for both economical and environmental reasons. A critical requirement on DIP quality for such grades is the cleanliness of the pulp. Indeed, the coating layer may not fully cover specks in the base paper. The objective of this work was to determine the required specifications of the coating layer to produce LWC with DIP base paper. The specks masking phenomena by the coating layer was studied from both optical measurements on coated handsheets made from DIP, and computer simulations of specks contrast reduction. The impact of coating layer parameters (coat weight and optical properties), base paper parameters (grammage and optical properties) and specks nature (grammage and optical properties) on specks masking is studied.

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22

Holá, Michaela, Martin Králik, Jarmila Müllerová, and L’ubomír Scholtz. "The optical properties of different materials used for thermo-optical switches." Journal of Electrical Engineering 72, no. 3 (June 1, 2021): 184–91. http://dx.doi.org/10.2478/jee-2021-0025.

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Abstract With growing demands of internet protocol services for transmission capacity and speed, the solution for future high speed optical networks is optical burst switching that is a technology for transmitting large amounts of data bursts through a transparent optical switching network the optical switches in optical burst switching networks play important role in the resource reservation and are very important to ensure reliability and flexibility of the network. This paper is focused on the very important components of Optical Burst Switching networks, ieo ptical switches, specifically thermo-optical switches. In this paper are presented the simulation analysis of performance evaluation of thermo-optical switches executed in the model of Optical Burst Switching network and simulation study of investigation of influence of roughness and layer thickness on the optical properties (spectral reflectance, transmittance) of selected materials (SiO2, Ta2O5, Al2O3) for thermooptical switches.

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23

Kasmani, Jafar Ebrahimpour, and Ahmad Samariha. "Effects of montmorillonite nanoclay on the properties of chemimechanical pulping paper." BioResources 16, no. 3 (July 28, 2021): 6281–91. http://dx.doi.org/10.15376/biores.16.3.6281-6291.

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The effects of nanoclay were studied relative to the physical, mechanical, optical, and morphological properties of chemimechanical pulping papers. Nanoclay was incorporated at 0%, 2%, 4%, 6%, 8%, or 10%. To increase the retention, 1% cationic starch was used in all test papers. Handsheets (60 g/m2 in weight) were tested to determine their physical, mechanical, optical, and morphological properties. Up to 2% nanoclay increased the tensile strength; at values greater than 2%, the tensile strength decreased. The addition of up to 4% nanoclay increased roughness; between 4% and 10% nanoclay, roughness decreased. With 10% nanoclay, the tear strength, burst strength, and brightness decreased, but the air resistance, opacity, and yellowness increased. Scanning electron microscopy showed that the nanoclay filled the pore spaces between fibers, thus increasing air resistance. X-ray diffraction patterns indicated an intercalated structure.

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24

Maksimyak, P. P., C. Yu Zenkova, and V. M. Tkachuk. "Carbon Nanoparticles. Production, properties, perspectives of use." Фізика і хімія твердого тіла 21, no. 1 (March 28, 2020): 13–18. http://dx.doi.org/10.15330/pcss.21.1.13-18.

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The paper is devoted to the study of the optical properties of carbon nanoparticles synthesized by the method developed during our experimental studies. The optimal conditions for the creation of carbon nanostructures with predetermined properties are defined. Nanoparticles of the size of about 100 nm were obtained, the maximum of absorption of which is localized at wavelengths in the violet-blue region of the spectrum, while the maximum of luminescence – in the green region of the spectrum. The assumption is made about the possibility of using the obtained particles for correlation diagnostics of optical speckle fields.

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25

Li, Lizi, Sanghoon Lee, Hak Lae Lee, and Hye Jung Youn. "Hydrogen peroxide bleaching of hardwood kraft pulp with adsorbed birch xylan and its effect on paper properties." BioResources 6, no. 1 (January 16, 2011): 721–36. http://dx.doi.org/10.15376/biores.6.1.721-736.

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The adsorption of xylan on pulp fibers improves the strength properties of paper. However, the optical properties are decreased significantly. The objective of our research was to bleach hardwood kraft pulp with adsorbed birch xylan by hydrogen peroxide and study the effect of bleaching parameters on paper properties. The bleaching parameters studied included bleaching temperature, time, initial pH as well as MgSO4 dosage. The optical properties (whiteness, brightness, opacity) and physical properties (tensile index, tearing index, bulk) of handsheets made from the pulp bleached with different process variables were measured. The results showed that better optical properties were obtained with higher bleaching temperature, longer bleaching time, and more MgSO4 dosage. Bleaching from an initial pH of 11 provided the highest brightness value. On the other hand, strength properties were improved with decreasing of the bleaching temperature, and increasing the initial pH and MgSO4 dosage. The relationship between strength properties and bleaching time varied depending on bleaching temperature. According to the results, both good mechanical properties and optical properties could be achieved when the operating parameters were controlled properly. Therefore hydrogen peroxide bleaching was proved to be a suitable method for bleaching hardwood kraft pulp with adsorption of birch xylan.

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26

Li, Zhi Jian, Qing Jun Meng, and Liang Liu. "The Influence of Offset Paper Properties on Printing Effect." Advanced Materials Research 550-553 (July 2012): 3295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.3295.

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Offset paper properties have great influence on the quality of print matter. Eleven offset paper samples were printed by IGT printability tester, then the density and L*a*b values of printed samples were measured. The relationship between paper properties and optical density or color gamut of paper printed was studied. The results show that main density increases with the increased ink quantity before the main density reaches saturation, the saturation density becomes greater with increased ink absorbency. When the smoothness is larger, lower ink quantity is needed for reaching saturation density, and larger color gamut is obtained. This study will provide references for the paper making and printing enterprises.

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27

Tang, Yan Jun, Man Chen, You Ming Li, Yu Zhao, and Xiu Mei Zhang. "Comparative Effect of Hydrophilic and Lipophilic Nanosized Titanium Dioxide on the Properties of Coated Paper." Advanced Materials Research 441 (January 2012): 750–53. http://dx.doi.org/10.4028/www.scientific.net/amr.441.750.

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In this paper, the effect of the charge of hydrophilic and lipophilic nanosized TiO2 on the optical properties and printability of coated paper was investigated. The parameters including brightness, opacity, surface strength and sizing degree were used to evaluate the optical properties and printability of coated paper. The effects of hydrophilic and lipophilic TiO2 on the properties of coated paper were discussed. It was shown that the optical properties and printability of coated paper increase persistently with the change of nanosized TiO2 charged from 5% to 15%. Once the charge of nanosized TiO2 was over 15%, the main properties of coated paper took on a downward tendency. The properties of coated paper were related to the surface properties of nanosized TiO2 samples. It was found that the lipophilicity of nanosized TiO2 sample played a more important role in the improvement of the coated paper properties, which was believed to be based on the fact that lipophilic nanosized TiO2 could be well compatible with the binders used in the paper coating.

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28

Journal, Baghdad Science. "Study of the Effect of Berry Paper Mulberry on Optical Properties of Poly Methyl Methacrylate." Baghdad Science Journal 11, no. 2 (June 1, 2014): 695–701. http://dx.doi.org/10.21123/bsj.11.2.695-701.

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In this work, study the optical properties of composites consisting of poly Methyl Methacrylate and Berry Paper Mulberry. The samples of composites were prepared using casting method .The Berry Paper Mulberry (BPM) was added by different concentrations are (0, 2, 4 and 6)wt.%. The optical properties of composites have been studied in the wavelength range (200-800)nm. The absorption coefficient ,energy gap, refractive index, extinction coefficient and dielectric constants have been determined. The results show that the optical constants change with increase of BPM concentrations .

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29

Gentsar, P. O., A. V. Stronski, L. A. Karachevtseva, and V. F. Onyshchenko. "Optical Properties of Monocrystalline Silicon Nanowires." Physics and Chemistry of Solid State 22, no. 3 (August 31, 2021): 453–59. http://dx.doi.org/10.15330/pcss.22.3.453-459.

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The paper presents the results of a study of the optical reflection and transmission spectra of a silicon single crystal p-Si (100) with silicon nanowires grown on both sides and porous silicon p-Si (100) on a single crystal substrate in the spectral range 0.2 ÷ 1.7 μm. The layers of nanowires had a thickness of 5.5 µm, 20 µm, 50 µm and a porosity of 60 %. The porous silicon layers had a thickness of 5 μm, 50 μm and a porosity of 45 %, 55 % and 65 %. The change in the energy band structure in single-crystal silicon nanowires and in a single-crystal matrix of porous silicon is shown.

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30

Sergent, Claude, Evelyne Pougatch, Marcel Sudul, and Barbara Bourdelles. "Experimental investigation of optical snow properties." Annals of Glaciology 17 (1993): 281–87. http://dx.doi.org/10.3189/s0260305500012970.

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The authors have developed an experimental device in a cold laboratory with the purpose of measuring optical parameters of natural snow depending on grain-size, impurity content and density. Snow samples were prepared from homogeneous layers in order to measure the radiative properties of clearly identified snow types. The first part of this paper describes the working assumptions and the experimental device. In the second part, experiment results are described and discussed. We have compared albedo measurements of different natural snow types with theoretical values derived from physical optics, based on Mie scattering. The albedo evolution of three different snow types submitted to temperature-gradient metamorphism is analyzed.

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31

Sergent, Claude, Evelyne Pougatch, Marcel Sudul, and Barbara Bourdelles. "Experimental investigation of optical snow properties." Annals of Glaciology 17 (1993): 281–87. http://dx.doi.org/10.1017/s0260305500012970.

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The authors have developed an experimental device in a cold laboratory with the purpose of measuring optical parameters of natural snow depending on grain-size, impurity content and density. Snow samples were prepared from homogeneous layers in order to measure the radiative properties of clearly identified snow types. The first part of this paper describes the working assumptions and the experimental device. In the second part, experiment results are described and discussed. We have compared albedo measurements of different natural snow types with theoretical values derived from physical optics, based on Mie scattering. The albedo evolution of three different snow types submitted to temperature-gradient metamorphism is analyzed.

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32

Xiaochun, Wu, Wang Rongyao, Zou Bingsuo, Wang Li, Liu Shaomei, Xu Jiren, and Huang Wei. "Optical properties of nanometer-sized CdO organosol." Journal of Materials Research 13, no. 3 (March 1998): 604–9. http://dx.doi.org/10.1557/jmr.1998.0077.

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In this paper, nanometer-sized CdO organosol was prepared by using microemulsion methods. Its electronic structure and optical properties are characterized through UV-visible light absorption, photoluminescence, and Z-scan techniques. Some newfeatures were observed. Fluorescence and nonlinear optical responses are mainly related to surface trapped states.

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33

Chen, Fei, Ming Li, Reda Hassanien Emam Hassanien, Xi Luo, Yongrui Hong, Zhikang Feng, Mengen Ji, and Peng Zhang. "Study on the Optical Properties of Triangular Cavity Absorber for Parabolic Trough Solar Concentrator." International Journal of Photoenergy 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/895946.

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A theoretical analytical method for optical properties of cavity absorber was proposed in this paper and the optical design software TracePro was used to analyze the optical properties of triangular cavity absorber. It was found that the optimal optical properties could be achieved with appropriate aperture width, depth-to-width ratio, and offset distance from focus of triangular cavity absorber. Based on the results of orthogonal experiment, the optimized triangular cavity absorber was designed. Results showed that the standard deviation of irradiance and optical efficiency of optimized designed cavity absorber were 30528 W/m2and 89.23%, respectively. Therefore, this study could offer some valuable references for designing the parabolic trough solar concentrator in the future.

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34

Wang, Weilin, Gaolin Li, Zhenghua Jiang, Ye Zhang, Tianjiao Hu, Jie Yi, and Zengyong Chu. "Structural, optical and flexible properties of CH3NH3PbI3 perovskite films deposited on paper substrates." Optical Materials 114 (April 2021): 110926. http://dx.doi.org/10.1016/j.optmat.2021.110926.

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35

Brault, D., K. A. Stewart, and S. Jenni. "Optical Properties of Paper and Polyethylene Mulches Used for Weed Control in Lettuce." HortScience 37, no. 1 (February 2002): 87–91. http://dx.doi.org/10.21273/hortsci.37.1.87.

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Optical properties of paper and plastic mulches were determined in experiments on mulched head lettuce (Lactuca sativa L.) grown in organic soil in 1997-98. Mulches used in 1997 were a coextruded white/black polyethylene, a beige paper coated with latex on both sides and a black paper coated with latex on both sides. Three supplementary mulches were added in the 1998 experiment: beige paper coated with a biodegradable polymer either coated on the underside, on the top side or on both sides. Optical properties of the polyethylene mulch remained stable over the course of the experiment. As the paper mulches aged, they changed structurally, spectrally, or both, but remained in place until harvest. The black paper was the only mulch that offered complete weed control, although the weeds under the other mulches did not develop beyond the cotyledonary or two-true-leaf stage.

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36

Jeong, Kyoung-Mo, Jong-Myoung Won, and Yong-Kyu Lee. "Influence of Organic Pigment Blending on Surface and Optical Properties of Coated Paper." Journal of Korea Technical Association of The Pulp and Paper Industry 44, no. 3 (June 30, 2012): 1–8. http://dx.doi.org/10.7584/ktappi.2012.44.3.001.

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Park, Jung-Yoon, Tai-Ju Lee, and Hyoung-Jin Kim. "Effects of Nano-sized Calcium Carbonate on Physical and Optical Properties of Paper." Journal of Korea Technical Association of The Pulp and Paper Industry 46, no. 4 (August 30, 2014): 1–10. http://dx.doi.org/10.7584/ktappi.2014.46.4.001.

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Chauhan, Indu, Sujay Chattopadhyay, and Paritosh Mohanty. "Fabrication of titania nanowires incorporated paper sheets and study of their optical properties." Materials Express 3, no. 4 (December 1, 2013): 343–49. http://dx.doi.org/10.1166/mex.2013.1136.

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Alarousu, Erkki, Leszek Krehut, Tuukka Prykäri, and Risto Myllylä. "Study on the use of optical coherence tomography in measurements of paper properties." Measurement Science and Technology 16, no. 5 (March 31, 2005): 1131–37. http://dx.doi.org/10.1088/0957-0233/16/5/012.

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40

Qiu, Zheng Rong, and Hong Yu. "Optical Properties of Silicon Quantum Dots." Key Engineering Materials 483 (June 2011): 760–64. http://dx.doi.org/10.4028/www.scientific.net/kem.483.760.

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A first-principles study of the optical properties of silicon quantum dots (Si QDs) with different diameters is presented in this paper. Si QDs consisting of 10-220 Si atoms, the corresponding diameter ranges from 6-20 Å, with full termination of the Si interface with H are investigated in detail. The results show that both the band gap and the absorption spectrum of Si QDs are size-dependent. For Si QDs with diameter ranges from 6-20 Å, as the diameter decreases, the band gap increases, and a considerable blue-shift in the absorption spectrum is occurred. This unique property can be used to extend the absorption spectrum of the solar cell by mixing in QDs with different sizes. Therefore, the full spectrum of the sunlight may be utilized more efficiently.

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Shi, Fengyan, Gangfeng Ma, and James T. Kirby. "NUMERICAL MODELING OF OPTICAL PROPERTIES INSIDE THE SURFZONE." Coastal Engineering Proceedings 1, no. 32 (January 29, 2011): 51. http://dx.doi.org/10.9753/icce.v32.currents.51.

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This paper provides a review of our recent developments in numerical models for predicting physical processes related to optical properties inside the surfzone. Model components in the developments include the bubble entrainment model, 2D and 3D multiphase two-fluid models for modeling quiescent phase of bubbles, turbulence models with influences of bubbles, bubble coalescence and breakup models used in the two-fluid models, and foam model for predicting foam patch generation and evolution inside the surfzone. The paper summarizes theories used in the model components and shows some numerical results from model tests.

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Kudreyko, Aleksey, and Vladimir Chigrinov. "Structural and Optical Characteristics of Flexible Optically Rewritable Electronic Paper." Crystals 12, no. 8 (August 16, 2022): 1149. http://dx.doi.org/10.3390/cryst12081149.

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A comprehensive theory of light-reflective characteristics and experimental technique of liquid crystal layer thickness control for flexible optically rewritable electronic paper is presented. Cylindrical pillars were used to control the gap between flexible substrates. The introduced prototype of optically rewritable electronic paper has shown very promising performance. In this regard, we report theoretical results of structural photosensitive alignment of nematic liquid crystals on flexible substrate. The focus of theoretical study is on understanding the self-assembled complex structure, governed by the interplay between surface anchoring and liquid crystal elasticity. Mueller matrix spectroscopic ellipsometry was used to study light-reflecting characteristics and polarization properties of the twisted nematic film.

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Hii, Collin, Øyvind W. Gregersen, Gary Chinga-Carrasco, and Øyvind Eriksen. "The effect of MFC on the pressability and paper properties of TMP and GCC based sheets." Nordic Pulp & Paper Research Journal 27, no. 2 (May 1, 2012): 388–96. http://dx.doi.org/10.3183/npprj-2012-27-02-p388-396.

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Abstract Different qualities of microfibrillated cellulose (MFC) were blended with thermomechanical pulp (TMP) and ground calcium carbonate (GCC) filler. The addition of MFC reduced the drainage of the pulp suspension but improved strength properties. Wet pressing experiments showed that optimal use of MFC and filler could enhance the strength and optical properties without reducing the solids content after wet pressing. Field-emission scanning electron microscopy (FESEM) revealed that MFC adsorbed onto and contributed to the bonding of the filler particles and fibres. The MFC binds the filler-MFC-fines aggregates to the fibre network and partially filled the pore network. As a result, MFC addition increased the air resistance and internal bonding of the sheet.

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Zhang, Liyun, Ying Zhou, Na Zhang, and Miao Zhang. "Optical Properties of Single-walled Carbon Nanotubes." Journal of Physics: Conference Series 2381, no. 1 (December 1, 2022): 012083. http://dx.doi.org/10.1088/1742-6596/2381/1/012083.

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Abstract In this paper, a series of single-walled carbon nanotubes’ optical properties are researched by using the ABINIT software package. The results show that the dielectric function and absorption coefficient of carbon nanotubes are related to both their geometric structure and their electronic structure. This has a guiding role for the further research of the optical properties of doped carbon nanotubes, carbon nanotubes with defects, and carbon nanotube arrays.

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Kim, P.-S. G., GA Botton, and TK Sham. "Morphology, Electronic and Optical Properties of Si Nanowires." Microscopy and Microanalysis 12, S02 (July 31, 2006): 688–89. http://dx.doi.org/10.1017/s1431927606065706.

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Liu, Peng Tao, Xue Si Liu, and Jin Gang Liu. "Effect of Calendering Conditions on the Properties of Paper." Advanced Materials Research 750-752 (August 2013): 2040–43. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.2040.

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The effect of calendering temperature, speed and linear load on the properties of opacity, brightness, smoothness, paper thickness, gloss and ink absorption of art paper were studied by orthogonal experiment. The art paper coating formulations were as follows: GCC-60 100 pph, solid content 64.6% for precoating; GCC-95 40 pph, Kaolin 60 pph, and solid content 61.3% for top coating. Bar coater was involved to coat by hand in the lab and the coating weight was controlled at 20±2g/m2. After calendering in different conditions, the optical properties and printability of paper were analyzed. Regression analysis was used to study which of the calendering conditions was the dominant factor influencing the paper properties. The results showed that linear load was the dominant one, followed by the calendering temperature and calendering speed. After calendering, smoothness and gloss increased, while the brightness and opacity decreased.

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Kumar, Hardik, Tanya Jain, Mritunjay Sharma, and Kamal Kishor. "Neural network approach for faster optical properties predictions for different PCF designs." Journal of Physics: Conference Series 2070, no. 1 (November 1, 2021): 012001. http://dx.doi.org/10.1088/1742-6596/2070/1/012001.

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Abstract Photonic Crystal Fibres (PCFs) are emerging as an alternative to standard fibres for applications in many disciplines like fibre lasers & amplifiers, imaging, spectroscopy and telecommunications. They have superior light guiding properties compared to ordinary Optical Fibres (OFs). This paper illustrates the potential of neural networks to efficiently and accurately compute the optical properties of PCFs including solid-core, hollow-core and multi-core designs. The proposed method takes a range of design parameters and wavelengths as input to predict PCF optical properties like effective index, effective mode area, confinement loss and dispersion desired for optimal specifications. The neural network approach is significantly better in terms of the low computational runtimes (~5 milli-sec) required for predicting the properties against the longer runtimes (~18 sec) required for similar calculations by traditional numerical methods.

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Gordeyev, Stanislav, Adam E. Smith, Jacob A. Cress, and Eric J. Jumper. "Experimental studies of aero-optical properties of subsonic turbulent boundary layers." Journal of Fluid Mechanics 740 (January 5, 2014): 214–53. http://dx.doi.org/10.1017/jfm.2013.658.

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AbstractThis paper gives the most-complete characterization to date of the optical aberrations imposed on a laser beam propagated through a subsonic, compressible, turbulent boundary layer in a zero-pressure gradient environment, over a range of boundary-layer thicknesses, oblique propagation angles and Mach numbers. This characterization is based on optical measurements using optical-wavefront-sensing instruments that have only become available in the last decade. The optical characterization includes and discusses in detail: optical-wavefront spectra, convective velocities of optically active large-scale structures and correlation functions in both streamwise and cross-stream directions, as well as root-mean-square optical path difference levels for different apertures. The scaling law based on the extended strong Reynolds analogy is derived and is shown to successfully collapse optical data collected in a number of facilities. Anisotropy of aero-optical distortions for different oblique viewing angles was experimentally quantified and is discussed.

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Mikhailov, Sergey A. "Nonlinear Electrodynamic and Optical Properties of Graphene." Advanced Materials Research 324 (August 2011): 237–40. http://dx.doi.org/10.4028/www.scientific.net/amr.324.237.

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Graphene is a recently discovered new material with unique physical properties. In this paper we discuss its electrodynamic and optical properties. It is shown that the electromagnetic response of graphene to the external radiation is strongly nonlinear and such phenomena as the frequency harmonics generation and frequency mixing effects can be observed in it. The nonlinear susceptibility of graphene is higher than that of many other materials.We predict that under certain conditions the plasmon enhanced second harmonic generation can be observed in graphene.

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Chao, Lu Men, Menke Neimule, Bao Li Yao, Ming Lei, Ying Li Wang, Xiao Man Sun, and Yi Chen. "Optical Storage Properties of Different Fulgides." Advanced Materials Research 660 (February 2013): 24–29. http://dx.doi.org/10.4028/www.scientific.net/amr.660.24.

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As one kind of organic photochromic optical storage material, fulgides are well-known for their thermally irreversibility. In this paper, two kinds of new fulgide materials, like pyrrylfulgide/PMMA film and 3-indoly-benzylfulgimide/PMMA film are used as storage materials. Different kinds of optical storage properties, like photosensitive spectral range, light sensitivity, resolution, fatigue resistance and thermal stability of them are measured. The experimental results show that for pyrrylfulgide and 3-indoly-benzylfulgimide, their photosensitive spectral range were 500nm~780nm and 480nm~720nm respectively; their maximum absorption were at 626nm and 573nm respectively; under 633nm light excitation, their light reaction constants of bleaching process on the exciting light polarization direction were 1.4×10-3cm2/mJ and 2.89×10-3cm2/mJ respectively; their resolution were both higher than 1680 lines/mm; they can be recycled more than 33 times and 70 times respectively; at room temperature they can be stored for 12 months and 14 months respectively. And it is concluded that pyrrylfulgide and 3-indoly-benzylfulgimide show better application potential in the field of rewriteable optical storage.

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