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Journal articles on the topic 'Optical measuring systems'

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Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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1

Melnikov, R. M., A. N. Kondrashov, M. A. Davydov, and B. S. Seletkov. "Approaches to modeling optical measuring systems." Russian Fiber Lasers 2, no. 1 (2022): 106. http://dx.doi.org/10.31868/2782-2354-rfl2022-2-1-106.

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2

Maerz, Norbert H., and Wei Zhou. "Calibration of optical digital fragmentation measuring systems." Fragblast 4, no. 2 (June 1, 2000): 126–38. http://dx.doi.org/10.1076/frag.4.2.126.7450.

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3

Simonović, Milan, Dragan Lazarević, Marko Simonović, and Bogdan Nedić. "Comparison of measurement using optical measuring systems and coordinate measuring machine." IMK-14 - Istrazivanje i razvoj 26, no. 2 (2020): 35–41. http://dx.doi.org/10.5937/imk2002035s.

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The paper presents the results of measuring the gearbox housing with the ATOS optical measuring system, the TRITOP system and the "TESA micro-hit 4-5-4" coordinate measuring machine. The aim of the study was to determine the differences in modern measuring systems and whether these differences affect the final measurement result when controlling parts of a complex configuration. At the beginning of the paper, the way of functioning of the used measuring systems and the results of research in this area are described. GOM Inspect software used for the ATOS and TRITOP measuring systems, while PC DMIS software used for the coordinate measuring machine. The analysis of the obtained results showed that there are significant differences in the measurement results and that the measuring systems used can't be applied with the same success to the measurement of parts of complex configuration such as the gearbox housing.

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4

Loderer, A., and T. Hausotte. "Qualification concept for optical multi-scale multi-sensor systems." Journal of Sensors and Sensor Systems 5, no. 1 (January 14, 2016): 1–8. http://dx.doi.org/10.5194/jsss-5-1-2016.

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Abstract. This article describes a new qualification concept for dimensional measurements on optical measuring systems. Using the example of a prototypical multi-scale multi-sensor fringe projection system for production-related inspections of sheet-bulk metal-formed parts, current measuring procedures of the optical system are introduced. Out of the shown procedures' deficiencies, a new concept is developed for determining the orientations and positions of the sensors' measuring ranges in a common coordinate system. The principle element of the concept is a newly developed flexible reference artefact, adapted to the measuring task of the fringe projection system. Due to its dull surface, the artefact is optimized for optical measuring systems, like the used fringe projection sensors. By measuring the reference artefact with each fringe projection sensor and aligning the resulting data sets on a digital reference model of the artefact, sensor-specific transformation matrices can be calculated which allow transformation of the sensors' data sets into a common coordinate system, without the need for any overlapping areas. This approach is concluded in an automated measuring procedure, using alignment algorithms from commercial available software where necessary. With the automated measuring procedure, geometrical relations between individual measured features can be determined and dimensional measuring beyond the measuring range of a sensor became possible. Due to a series of experiments, the advantages of the new qualification concept in comparison with the current measuring procedures are finally revealed.

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5

Zaacks, M., U. Mahlab, M. Horowitz, and S. Stepanov. "Online measuring dispersion sign in optical communication systems." Electronics Letters 39, no. 16 (2003): 1198. http://dx.doi.org/10.1049/el:20030739.

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6

Budai, B. T., I. V. Myakutina, and N. V. Kasatkin. "Reduction of the Distortions in Optical Measuring Systems." Measurement Techniques 58, no. 6 (September 2015): 640–46. http://dx.doi.org/10.1007/s11018-015-0768-1.

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7

Wójcik, Waldemar, Aliya Kalizhanova, Gulzhan Kashaganova, Ainur Kozbakova, Zhalau Aitkulov, and Zhassulan Orazbekov. "RESEARCH OF PARAMETERS OF FIBER-OPTICAL MEASURING SYSTEMS." Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska 9, no. 2 (June 21, 2019): 28–31. http://dx.doi.org/10.5604/01.3001.0013.2543.

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At present there exist a lot of technical devices, the failure of which can be connected not only with huge financial losses, but with the treat to the environment as well. Therefore, an important problem is the effective devices conditions diagnostics, including electronic components and check of their operation. Timely faults detecting allows introducing the prevention measures and avoiding serious consequences. Fiber-optic sensors have several advantages, more important of which include the immunity to electromagnetic disturbances, little weight and possibility to be included into the structure being measured. The most perspective are the sensors based on the Bragg fiber gratings. Bragg fiber gratings have several advantages, for instance, they allow creating the distributed measuring massifs, which contain several sensors. As well, they are insensitive to the optic power source vibrations. Variety of using the fiber sensors based on the Bragg fiber gratings has led to producing the Bragg fiber gratings with different spectral characteristics. Homogeneous Bragg fiber gratings have the spectra with solid side lobes, which can influence at the temperature sensor processing characteristics. To level the side lobes there is applied the apodization method, which is one of the means to affect the spectral form. The article herein considers the issues of the Bragg fiber gratings mathematical and computer modeling using the transfer matrix method. Transfer matrix method allows defining the optical components spectral characteristics based on the bound modes theory and description of electromagnetic wave, passing through an optic fiber. In the article there have been analyzed the Bragg fiber gratings in compliance with spectral features, such as transmission and reflectance spectra. As well, there has been carried out the experiment with influence of various parameters at the Bragg fiber gratings spectral characteristics. There have been studied the Bragg fiber gratings spectral features and selected the grating optimal parameters for designing the fiber-optic sensors based on the Bragg fiber gratings.

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8

Balle, Bernd. "Measuring means knowledge." Advanced Technologies in Mechanics 3, no. 1(6) (March 2, 2017): 24. http://dx.doi.org/10.17814/atim.2016.1(6).37.

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Optical designers, physicists and engineers at FISBA develop, analyze and optimize optical components on behalf of their customers. Thanks to its innovative production techniques, the Swiss company is widely renowned as a manufacturer of highquality optical components and systems. A ZEISS MICURA coordinate measuring machine is among the tools used by the company to ensure the quality that is valued around the globe.

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9

Galanulis, Konstantin. "Optical Measuring Technologies in Sheet Metal Processing." Advanced Materials Research 6-8 (May 2005): 19–34. http://dx.doi.org/10.4028/www.scientific.net/amr.6-8.19.

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During recent years, optical measuring technologies in sheet metal forming and tooling have been used more and more in the industry. Main applications are the digitizing of metal sheet parts and tools, forming analysis of metal sheets as well as the determination of material properties. Good interfaces to conventional CAD/CAM and numerical simulation systems made such optical measuring systems a part of complex process chains. These process chains mainly focus on optimizing the development of products and production processes and on improving the product quality. Using optical systems considerably decreases the development time for products and production while improving the quality.

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10

Meshcheryakov, V. I., M. I. Sinelnikov, and O. K. Filippov. "Measuring the focal lengths of long-focus optical systems." Journal of Optical Technology 66, no. 5 (May 1, 1999): 458. http://dx.doi.org/10.1364/jot.66.000458.

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11

Maerz, Norbert H., and Wei Zhou. "Optical digital fragmentation measuring systems – inherent sources of error." Fragblast 2, no. 4 (January 1998): 415–31. http://dx.doi.org/10.1080/13855149809408786.

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12

Chugui, Yu V. "Optical measuring systems and technologies for science and industry." Pattern Recognition and Image Analysis 21, no. 2 (June 2011): 121–24. http://dx.doi.org/10.1134/s1054661811020234.

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13

Pilipovich, V. A., A. K. Esman, I. A. Goncharenko, and V. K. Kuleshov. "Optical data switching in information processing and measuring systems." Measurement Techniques 47, no. 9 (September 2004): 879–83. http://dx.doi.org/10.1007/s11018-005-0034-z.

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14

Woods, Russell L., Niall C. Strang, and David A. Atchison. "Measuring contrast sensitivity with inappropriate optical correction." Ophthalmic and Physiological Optics 20, no. 6 (November 2000): 442–51. http://dx.doi.org/10.1046/j.1475-1313.2000.00525.x.

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15

Woods, Russell L., Niall C. Strang, and David A. Atchison. "Measuring contrast sensitivity with inappropriate optical correction*." Ophthalmic and Physiological Optics 20, no. 6 (November 2000): 442–51. http://dx.doi.org/10.1111/j.1475-1313.2000.tb01122.x.

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16

Woods, R. "Measuring contrast sensitivity with inappropriate optical correction." Ophthalmic and Physiological Optics 20, no. 6 (November 2000): 442–51. http://dx.doi.org/10.1016/s0275-5408(99)00089-7.

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17

Loderer, Andreas, Martin Timmermann, Steffen Matthias, Markus Kästner, Thomas Schneider, Tino Hausotte, and Eduard Reithmeier. "Measuring Systems for Sheet-Bulk Metal Forming." Key Engineering Materials 639 (March 2015): 291–98. http://dx.doi.org/10.4028/www.scientific.net/kem.639.291.

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In order to fulfil today’s demands on fast, efficient and sustainable production processes the sheet-bulk metal forming is being developed as a new forming technology within the scope of the SFB/Transregio 73. Characteristically for the sheet bulk metal forming is a three dimensional material flow, which allows for extensive freedom in the design process. To ensure maintaining all the advantages, provided by sheet-bulk metal forming, new inspection concepts for the produced parts as well as for the forming tools have to be developed. For a production-related inspection of produced parts a multi-sensor fringe projection system is under development, which will be employed to detect deviations of features’ form and size. With its sensors of varying measuring range and resolution a feature adapted inspection is possible. Additionally an optical fibre sensor is projected to detect small parts of interest in a very high resolution to enhance the possibilities of the multiscale multi-sensor system. A newly developed endoscopic fringe projection system is used to inspect parts that are out of reach for common optical measuring systems such as the forming tool of the process. This allows for a continuous measurement of tool features and thus the detection of slow growing wear. Challenging for measurement tasks in the sheet-bulk metal forming process are not only the complex geometries but also the harsh environmental conditions and especially for the parts’ inspection, the different surface parameters. In this article the surface parameters of the some sheet-bulk metal formed parts and forming tools will be explained, followed by a description of the different measuring systems. Finally an exemplary evaluation of the influence of the surface properties on an optical measuring system will be shown.

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18

KOLMOGOROV, OLEG V., ANNA V. DEIKUN, and EKATERINA V. CHEMESOVA. "INSTALLATION FOR MEASURING SIGNAL PROPAGATION DELAYS IN OPTICAL ELEMENTS." H&ES Research 12, no. 4 (2020): 36–43. http://dx.doi.org/10.36724/2409-5419-2020-12-4-36-43.

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The results of the development of an installation for measuring signal propagation delays in optical elements and optical fibers are presented. Measuring the delays of signal propagation in optical elements and optical fibers required for the development of various instruments, in particular, the development of fiber-optic systems, the synchronization time scales for complexes of metrological support of the global navigation satellite system GLONASS and measuring means of ground-based GLONASS, the development of metrological maintenance of fiber-optic communication systems, the development radiophonic systems (e.g., phased arrays with fiber-optical channels, measuring systems with remote antennas). It is shown that the installation allows to implement phase and pulse methods for measuring signal propagation delays introduced by optical elements, as well as a modified pulse method designed to determine the delays in optical elements with a large signal attenuation, when the accuracy of measurements by other methods is reduced due to the increasing influence of noise measuring equipment. The developed method is based on registration of the pulse shape with the help of analog-to-digital Converter, the approximation was a data taking into account information about the original form of pulses to reduce random error caused by the influence of noise, and subsequent determination of temporal characteristics of pulses using parameters approximating functions. The application of the developed method for various forms of laser pulses is considered, the scheme of the installation implementing these methods is presented, and the results of experimental studies of the installation are presented. It is shown that the modified pulse method allows to reduce the measurement error of signal propagation delays in optical fibers and optical elements by 15–20% or more, depending on the introduced attenuation, and the installation for measuring signal propagation delays can be used to control the characteristics of optical fibers and optical elements of various fiber-optic systems.

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19

Stroilov, N. A., E. V. Belinskaya, N. N. Brysin, A. N. Vasileiskaya, S. V. Voronkov, A. V. Nikitin, and A. A. Forsh. "Criteria and methods for focusing high-precision optical measuring systems." Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa 19, no. 3 (2022): 119–30. http://dx.doi.org/10.21046/2070-7401-2022-19-3-119-130.

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20

Kanoi, M., G. Takahashi, T. Sato, M. Higaki, E. Mori, and K. Okumura. "Optical Voltage and Current Measuring System for Electric Power Systems." IEEE Power Engineering Review PER-6, no. 1 (January 1986): 39–40. http://dx.doi.org/10.1109/mper.1986.5528230.

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21

Kanoe, M., G. Takahashi, T. Sato, M. Higaki, E. Mori, and K. Okumura. "Optical Voltage and Current Measuring System for Electric Power Systems." IEEE Transactions on Power Delivery 1, no. 1 (1986): 91–97. http://dx.doi.org/10.1109/tpwrd.1986.4307893.

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22

Leviton, Douglas B., John G. Hagopian, Paul H. Geithner, Rene A. Boucarut, Timothy J. Madison, Ritva A. M. Keski-Kuha, George Hartig, Lawrence D. Gardner, and Thomas A. French. "Measuring Efficiency of Far Ultraviolet Optical Systems in Gaseous Nitrogen." Applied Optics 36, no. 34 (December 1, 1997): 9099. http://dx.doi.org/10.1364/ao.36.009099.

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23

Tanaka, Yasuhiro, and Motonobu Yoshikawa. "Novel measuring technique of the optical performance of objective lenses for optical disk systems." Applied Optics 31, no. 25 (September 1, 1992): 5305. http://dx.doi.org/10.1364/ao.31.005305.

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24

Stancanelli, Laura Maria, Rosaria Ester Musumeci, Alberto Marini, Enrico Foti, Ivan Caceres Rabionet, and Agustin Sanchez Arcilla. "OPTICAL TECHNIQUES FOR MEASURING SWASH ZONE MORPHODYNAMICS." Coastal Engineering Proceedings 1, no. 32 (January 30, 2011): 33. http://dx.doi.org/10.9753/icce.v32.sediment.33.

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The use of different optical systems based on computer vision approach, for measuring swash zone morphological changes, is here proposed. In particular, such techniques are able to achieve quite accurate 2D and 3D reconstruction of the sandy bottom in dynamic conditions under regular waves. They are considered truly non-invasive, since there is no interaction of the hardware with the water motion. The optical techniques have been applied both at small and at large scale facilities for the investigation on the seabed interaction with the fluid motion within the swash zone. The performances of well-established more traditional measurement instruments have been compared with the proposed optical instruments both at small and large scales. In both cases satisfactory results have been gathered during the present experimental campaign.

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25

Chugui, Yuri V. "3D Optical Measuring and Laser Technologies for Science and Industry." Applied Mechanics and Materials 870 (September 2017): 41–46. http://dx.doi.org/10.4028/www.scientific.net/amm.870.41.

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Modern industry and science take novel 3D optical measuring systems and laser technologies with high resolution. For solving their actual problems we have developed the family of the optical measuring systems and technologies. Peculiarities of 3D image formation under partially coherent illumination using constructive calculation method are given. The optical methods and system for 3D dimensional inspection of ceramic parts are presented. The performances of 3D super resolution optical low-coherent micro-/nanoprofilometer are given. Using atomic perfectly-smooth mirror as a reference object, the breakthrough in-depth measurement with 20 picometers was achieved. The newest results in the field of laser technologies for high-precision synthesis of microstructures by updated image generator using the semiconductor laser are presented. The measuring systems and the laser image generator have been tested by the customers and are used in different branches of industry and science.

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26

Koval, Oleksandr, and Andrii Koval. "Research the complexity method to reduce errors in the measurement of linear movement of elements of road machine design." Bulletin of Kharkov National Automobile and Highway University 1, no. 92 (March 4, 2021): 160. http://dx.doi.org/10.30977/bul.2219-5548.2021.92.1.160.

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Problem. Currently, the problem of optimal control of the road machines is one of the most pressing tasks. Consequently, there is a significant need for on-board multifunctional measuring systems. Along with this, today measuring systems are mainly used only to provide control of power units. It is still relevant to determine the spatial position of the working bodies of the road machine in order to optimize their movement when performing working technological processes. Goal. The goal is to investigate the measurements of linear movement of road machine design elements when complexing ultrasonic and optical sensors of linear movements. Methodo-logy. The analytical and experimental research methods for the development and application of onboard measuring systems have been used. When complex the method of sensors combined into one system, the methods of system analysis were used. Results. Functional features of application of optical and ultrasonic gauges for measurements of linear moving elements of a design of the road machines are revealed. Principles of measurements of linear moving are investigated at complex use of gauges in a uniform measuring system. Originality. In order to improve the accuracy of technological processes and optimal control of the road machine, it is proposed to measure the linear movement of structural elements both relative to each other and relative to the earth's surface. The combined use of ultrasonic and optical methods will significantly reduce measurement errors. Practical value. The use of the proposed method for measuring the relative position of the structural elements of a road machine design will make it possible to perform high-quality technological processes at any time of the year or day, regardless of the current natural and weather conditions.

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27

Chugui, Yuri V., Alexander G. Verkhoglyad, Petr S. Zavyalov, Evgeny V. Sysoev, Rodion V. Kulikov, Ignat A. Vykhristyuk, Marina A. Zavyalova, Alexander G. Poleshchuk, and Victor P. Korolkov. "Optical Measuring and Laser Technologies for Scientific and Industrial Applications." International Journal of Automation Technology 9, no. 5 (September 5, 2015): 515–24. http://dx.doi.org/10.20965/ijat.2015.p0515.

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Modern industry and science require novel 3D optical measuring systems and laser technologies with micrometer/nanometer resolutions. To solve actual problems, we have developed a family of these optical measuring systems and technologies. An optical system for the 3D inspection of ceramic parts is described. A new approach to the formation of 3D laser templates using diffractive optics is presented for large objects, such as ~30 m antennas. The performance specifications of a 3D super resolution, optical low-coherent micro/nano profilometer are given. Using a perfectly smooth atomic mirror as a reference object, a breakthrough depth measurement with resolution of 20 picometers is achieved. The newest results in the field of laser technologies for the high-precision synthesis of microstructures by an updated laser circular image generator using the semiconductor laser is presented. The measuring systems and the laser image generator have been tested by customers and are used in different branches of industry and science.

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28

Schoch, K. F. "Statistical analysis of measuring systems [Books]." IEEE Electrical Insulation Magazine 12, no. 4 (July 1996): 43. http://dx.doi.org/10.1109/mei.1996.526952.

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29

Retzlaff, Max-Gerd, Johannes Hanika, Jürgen Beyerer, and Carsten Dachsbacher. "Physically based computer graphics for realistic image formation to simulate optical measurement systems." Journal of Sensors and Sensor Systems 6, no. 1 (May 8, 2017): 171–84. http://dx.doi.org/10.5194/jsss-6-171-2017.

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Abstract. Physically based image synthesis methods, a research direction in computer graphics (CG), are capable of simulating optical measuring systems in their entirety and thus constitute an interesting approach for the development, simulation, optimization, and validation of such systems. In addition, other CG methods, so-called procedural modeling techniques, can be used to quickly generate large sets of virtual samples and scenes thereof that comprise the same variety as physical testing objects and real scenes (e.g., if digitized sample data are not available or difficult to acquire). Appropriate image synthesis (rendering) techniques result in a realistic image formation for the virtual scenes, considering light sources, material, complex lens systems, and sensor properties, and can be used to evaluate and improve complex measuring systems and automated optical inspection (AOI) systems independent of a physical realization. In this paper, we provide an overview of suitable image synthesis methods and their characteristics, we discuss the challenges for the design and specification of a given measuring situation in order to allow for a reliable simulation and validation, and we describe an image generation pipeline suitable for the evaluation and optimization of measuring and AOI systems.

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30

Lei, F., and L. K. Dang. "Measuring the focal length of optical systems by grating shearing interferometry." Applied Optics 33, no. 28 (October 1, 1994): 6603. http://dx.doi.org/10.1364/ao.33.006603.

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31

Carmignato, Simone, and Enrico Savio. "Metrological performance verification of coordinate measuring systems with optical distance sensors." International Journal of Precision Technology 2, no. 2/3 (2011): 153. http://dx.doi.org/10.1504/ijptech.2011.039457.

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32

Amirante, Riccardo, Carlo Coratella, Elia Distaso, Gianluca Rossini, and Paolo Tamburrano. "Optical device for measuring the injectors opening in common rail systems." International Journal of Automotive Technology 18, no. 4 (May 24, 2017): 729–42. http://dx.doi.org/10.1007/s12239-017-0072-y.

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33

Chuguy, Yuri V. "Optical Measurement Technologies and Systems for Industrial Applications." Key Engineering Materials 295-296 (October 2005): 201–8. http://dx.doi.org/10.4028/www.scientific.net/kem.295-296.201.

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Ensuring the safety of nuclear reactors and their high exploitation reliability requires a 100 % noncontact precise inspection of geometrical parameters of their fuel elements, grid spacers and quality of fuel element surface. For the solution of these 3D inspection tasks we have developed and produced a laser measuring machine (LMM) using multipoint structured illumination, optoelectronic shadow systems as Control and optical low-coherent profilometer as Radar. The results of their industrial testing are presented and discussed.

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34

Harmatys, Wiktor, Michael Marxer, Piotr Gąska, Maciej Gruza, and Adam Gąska. "The modelling of the measuring point reproduction error for optical coordinate measuring machines." MATEC Web of Conferences 322 (2020): 01053. http://dx.doi.org/10.1051/matecconf/202032201053.

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Coordinate measuring machines (CMMs) are the most common measuring systems used for assessing the compliance of manufactured components with their geometrical specifications. Optical CMMs are currently gaining popularity as they enable fast and contactless measurement with accuracy almost as high as in case of tactile measurement. During the performing of measurement, the points at which the measurement is conducted are usually not exactly at the intended location, but due to different impacts (error sources), they are in the area surrounding this location. This paper presents a method for modelling the reproduction of point coordinates as probability ellipses geometrically limiting the area in which the actual measurement points may lie. Different mathematical algorithms for the description of these ellipses were examined and a discussion on the selection of the best method is presented in this paper.

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35

Villaseñor-Aguilar, Marcos-Jesús, José-Alfredo Padilla-Medina, José-Enrique Botello-Álvarez, Micael-Gerardo Bravo-Sánchez, Juan Prado-Olivares, Alejandro Espinosa-Calderon, and Alejandro-Israel Barranco-Gutiérrez. "Current Status of Optical Systems for Measuring Lycopene Content in Fruits: Review." Applied Sciences 11, no. 19 (October 8, 2021): 9332. http://dx.doi.org/10.3390/app11199332.

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Optical systems are used for analysing the internal composition and the external properties in food. The measurement of the lycopene content in fruits and vegetables is important because of its benefits to human health. Lycopene prevents cardiovascular diseases, cataracts, cancer, osteoporosis, male infertility, and peritonitis. Among the optical systems focused on the estimation and identification of lycopene molecule are high-performance liquid chromatography (HPLC), the colorimeter, infrared near NIR spectroscopy, UV-VIS spectroscopy, Raman spectroscopy, and the systems of multispectral imaging (MSI) and hyperspectral imaging (HSI). The main objective of this paper is to present a review of the current state of optical systems used to measure lycopene in fruits. It also reports important factors to be considered in order to improve the design and implementation of those optical systems. Finally, it was observed that measurements with HPLC and spectrophotometry present the best results but use toxic solvents and require specialized personnel for their use. Moreover, another widely used technique is colorimetry, which correlates the lycopene content using color descriptors, typically those of CIELAB. Likewise, it was identified that spectroscopic techniques and multispectral images are gaining importance because they are fast and non-invasive.

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36

Lin, Psang Dain. "Analysis and Modeling of Optical Elements and Systems." Journal of Engineering for Industry 116, no. 1 (February 1, 1994): 101–7. http://dx.doi.org/10.1115/1.2901799.

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In this paper a new generalized methodology to analyze optical elements and systems is introduced. The reflection and refraction laws are formulated in the form of a homogeneous transformation matrix. A system to measure the roughness of a surface is designed and modeled using this method, and a converging lens is analyzed as an illustrative example. The results show that the imperfections of this lens can be easily assessed and the performance of this measurement system is excellent even in measuring surfaces with orientation changes.

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37

Mulder, J., Henk Vegter, Holger Aretz, and A. H. van den Boogaard. "Accurate Evaluation Method for the Hydraulic Bulge Test." Key Engineering Materials 554-557 (June 2013): 33–40. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.33.

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Optical measuring systems provide much more detail on the deformation of the blank in the bulge test than conventional contact height measuring systems. A significant increase in accuracy of the stress-strain curve can be achieved by fitting the surface to more complicated equations than the traditional spherical surface and by considering the local strain data to approximate the curvature for the midplane. In particular an ellipsoid shape is shown to be very accurate in describing the surface of the blank. Contact height measuring systems provide insufficient data to fit a surface to an ellipsoid shape and to establish local strain data. Pragmatic equations are proposed using the work hardening coefficient from the tensile test to approximate the same accuracy in stress-strain curves as obtained by optical measuring systems using the before mentioned evaluation method.

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38

Chugui, Yu, A. Verkhoglyad, A. Poleshchuk, V. Korolkov, E. Sysoev, and P. Zavyalov. "3D Optical Measuring Systems and Laser Technologies for Scientific and Industrial Applications." Measurement Science Review 13, no. 6 (December 1, 2013): 322–28. http://dx.doi.org/10.2478/msr-2013-0048.

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Abstract Modern industry and science require novel 3D optical measuring systems and laser technologies with micro/nanometer resolution for solving actual problems. Such systems, including the 3D dimensional inspection of ceramic parts for electrotechnical industry, laser inspection of wheel pair diagnostic for running trains and 3D superresolution low-coherent micro- /nanoprofilometers are presented. The newest results in the field of laser technologies for high-precision synthesis of microstructures by updated image generator using the semiconductor laser are given. The measuring systems and the laser image generator developed and produced by TDI SIE and IAE SB RAS have been tested by customers and used in different branches of industry and science.

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39

Vlaeyen, Michiel, Han Haitjema, and Wim Dewulf. "Digital Twin of an Optical Measurement System." Sensors 21, no. 19 (October 6, 2021): 6638. http://dx.doi.org/10.3390/s21196638.

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Digital twins of measurement systems are used to estimate their measurement uncertainty. In the past, virtual coordinate measuring machines have been extensively researched. Research on digital twins of optical systems is still lacking due to the high number of error contributors. A method to describe a digital twin of an optical measurement system is presented in this article. The discussed optical system is a laser line scanner mounted on a coordinate measuring machine. Each component of the measurement system is mathematically described. The coordinate measuring machine focuses on the hardware errors and the laser line scanner determines the measurement error based on the scan depth, in-plane angle and out-of-plane angle. The digital twin assumes stable measurement conditions and uniform surface characteristics. Based on the Monte Carlo principle, virtual measurements can be used to determine the measurement uncertainty. This is demonstrated by validating the digital twin on a set of calibrated ring gauges. Two validation tests are performed: the first verifies the virtual uncertainty estimation by comparison with experimental data. The second validates the measured diameter of different ring gauges by comparing the estimated confidence interval with the calibrated diameter.

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Lenkov, S. V. "2D input signal reconstruction from results of measuring by digital optical systems." Optoelectronics, Instrumentation and Data Processing 44, no. 5 (October 2008): 412–18. http://dx.doi.org/10.3103/s875669900805004x.

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Kulchin, Yu N., and E. V. Zakasovskaya. "Artifacts suppression in limited data problem for parallel fiber optical measuring systems." Optical Memory and Neural Networks 18, no. 3 (September 2009): 171–80. http://dx.doi.org/10.3103/s1060992x09030060.

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Saccomano, Samuel C., and Kevin J. Cash. "A near-infrared optical nanosensor for measuring aerobic respiration in microbial systems." Analyst 147, no. 1 (2022): 120–29. http://dx.doi.org/10.1039/d1an01855h.

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We developed a ratiometric optical oxygen nanosensor using a near-infrared oxygen indicator and a stable reference dye. We demonstrated its applicability through a microwell plate assay in which we observed oxygen consumption in brewing yeast.

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Miks, Antonin, and Jiri Novak. "Estimation of accuracy of optical measuring systems with respect to object distance." Optics Express 19, no. 15 (July 12, 2011): 14300. http://dx.doi.org/10.1364/oe.19.014300.

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de Graaf, G., and R. F. Wolffenbuttel. "Smart optical sensor systems in CMOS for measuring light intensity and colour." Sensors and Actuators A: Physical 67, no. 1-3 (May 1998): 115–19. http://dx.doi.org/10.1016/s0924-4247(97)01774-3.

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Miltsin, Aleksandr, Aleksey Platonov, Andrey Safonov, and Gennadiy Makarov. "The Efficiency of optical systems for measuring of thickness of round timber." Актуальные направления научных исследований XXI века: теория и практика 2, no. 2 (March 11, 2014): 83–88. http://dx.doi.org/10.12737/2973.

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Grigoriev, Vasiliy V., Alexei K. Mityurev, Andrey O. Pogonyshev, and Konstantin B. Savkin. "High-precision apparatus for measuring cutoff wavelength of the single-mode optical fiber." Izmeritel`naya Tekhnika, no. 6 (2020): 22–26. http://dx.doi.org/10.32446/0368-1025it.2020-6-22-26.

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Currently, communication systems are widely used, where optical fiber is used as a transmission medium. In turn, decision and control of optical fiber parameters has become needfull, since these parameters have a significant impact on the quality and quantity of transmitted information using fiber-optic communication systems. One of these parameters is cut-off wavelength of the single-mode optical fiber, which determines the minimum wavelength of optical radiation at which the optical fiber supports only one propagated mode, in other words, operates in single-mode. The problem of decision cut-off wavelength of the optical fiber used in fiber-optic communication systems is quite relevant and demand, since when the optical fiber operates in multimode, its throughput decreases due to inter-mode dispersion. The article describes methods for measuring cut-off wavelength of the optical fiber. Variant of a high- precision apparatus for measuring cut-off wavelength of the optical fiber has been proposed and tested. The measurements were performed based on the reference bending technique described in GOST R IEC 60793-1-44-2013. The analysis of the accuracy characteristics of the developed apparatus is made, a quantitative assessment of the measurement error is obtained.

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Loderer, Andreas, Bogdan Galovskyi, Wito Hartmann, and Tino Hausotte. "Qualifying Measuring Systems by Using Six Sigma." Key Engineering Materials 637 (February 2015): 37–43. http://dx.doi.org/10.4028/www.scientific.net/kem.637.37.

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The technology of sheet-bulk metal forming enables the production of complex workpieces with filigree surface structures in only a few forming steps. In order to provide a rapid and production-related workpiece inspection of not only large workpiece features, but also small features in an appropriate quality, a multi-sensor optical measurement system with different resolutions is required. Workpiece features of medium size can be measured by two types of fringe projection sensors. With a structured approach according to Six Sigma, which is based on the five phases design, measure, analyze, improve and control complex tasks are divided into smaller individual problems. In each phase the Six Sigma method recommends tools for solving the individual problems effectively. With the support of the Six Sigma guideline an exemplary sheet-bulk metal forming workpiece feature is used in order to qualify the two measuring systems for a production-related measurement. After defining the explicit goal for the investigations, a detailed analysis of the measurement process leads to a couple of relevant influences. These are input factors for the design of experiments. By a full factorial design, not only an influence of a factor itself, also the interactions between multiple factors can be detected. In the analyze-phase, these results are calculated by different statistical methods. To present the results in a comprehensible way several types of diagrams are used. The shown approach gives an example for a traceable and methodical way to qualify a measurement system for challenging measurement tasks.

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Miridonov, Serguei V., Igor Sidorov, Ervin Nippolainen, and Alexei A. Kamshilin. "Accuracy of measuring systems using dynamic speckles." Journal of the Optical Society of America A 26, no. 4 (March 11, 2009): 745. http://dx.doi.org/10.1364/josaa.26.000745.

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Mendřický, Radomír. "Precision Analysis of Optical 3D Digitisation of Shaped Elements." Applied Mechanics and Materials 693 (December 2014): 177–82. http://dx.doi.org/10.4028/www.scientific.net/amm.693.177.

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This paper presents results of a carried out research in the field of scanning precision of contactless optical 3D scanners. Results stated in this paper bring great benefits to practice, since it demonstrates the quality and limits of measuring by means of contactless optical systems in real conditions and therefore its possible use in the field of inspecting the dimensional and shape precision of industrial products.A measurement etalon of various shapes and sizes was designed and manufactured for the purpose of this analysis. The nominal dimensions of the etalon were set by measuring of the coordinate measuring machine and these real values were compared to the model obtained by optical digitisation of Atos II and RevScan. Based on the evaluation of results, scanner measurement precision diagrams were drawn according to the studied aspects, e.g. dependence on the shape of the measured element and its nominal size. Another essential part of the research was determining the ability of 3D scanners to capture detailed parts of the model and assessing the scanning limits for each of the optical systems.

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Neuschaefer-Rube, Ulrich, Michael Neugebauer, W. Ehrig, Markus Bartscher, and U. Hilpert. "Tactile and Optical Microsensors - Test Procedures and Standards." Key Engineering Materials 381-382 (June 2008): 23–26. http://dx.doi.org/10.4028/www.scientific.net/kem.381-382.23.

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This paper presents procedures and standards to test tactile and optical microsensors and micro-computed tomography (CT) systems. The tests are similar to the established tests for classical coordinate measuring machines and assess local and global sensor characteristics. For this purpose, adequate and miniaturized reference standards were manufactured, calibrated and tested. In addition, task-specific reference standards have been realized to determine special sensor characteristics such as the maximum slope angle measurable by optical sensors or specific errors of tactile-optical microprobes measuring deep microholes.

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