Articoli di riviste: "Coherence (Optics)"

1

Schleich, W. P. "Quantum Optics: Optical Coherence and Quantum Optics." Science 272, n. 5270 (28 giugno 1996): 1897–98. http://dx.doi.org/10.1126/science.272.5270.1897-a.

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Schleich, W. P. "Quantum Optics: Optical Coherence and Quantum Optics." Science 272, n. 5270 (28 giugno 1996): 1897b—1898b. http://dx.doi.org/10.1126/science.272.5270.1897b.

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3

Chriki, Ronen, Slava Smartsev, David Eger, Ofer Firstenberg e Nir Davidson. "Coherent diffusion of partial spatial coherence". Optica 6, n. 11 (29 ottobre 2019): 1406. http://dx.doi.org/10.1364/optica.6.001406.

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4

Mandel, Leonard, Emil Wolf e Jeffrey H. Shapiro. "Optical Coherence and Quantum Optics". Physics Today 49, n. 5 (maggio 1996): 68–70. http://dx.doi.org/10.1063/1.2807623.

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5

Mandel, Leonard, Emil Wolf e Pierre Meystre. "Optical Coherence and Quantum Optics". American Journal of Physics 64, n. 11 (novembre 1996): 1438–39. http://dx.doi.org/10.1119/1.18450.

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6

Hyde, Milo. "Controlling the Spatial Coherence of an Optical Source Using a Spatial Filter". Applied Sciences 8, n. 9 (26 agosto 2018): 1465. http://dx.doi.org/10.3390/app8091465.

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This paper presents the theory for controlling the spectral degree of coherence via spatial filtering. Starting with a quasi-homogeneous partially coherent source, the cross-spectral density function of the field at the output of the spatial filter is found by applying Fourier and statistical optics theory. The key relation obtained from this analysis is a closed-form expression for the filter function in terms of the desired output spectral degree of coherence. This theory is verified with Monte Carlo wave-optics simulations of spatial coherence control and beam shaping for potential use in free-space optical communications and directed energy applications. The simulated results are found to be in good agreement with the developed theory. The technique presented in this paper will be useful in applications where coherence control is advantageous, e.g., directed energy, free-space optical communications, remote sensing, medicine, and manufacturing.

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Singer, Andrej, e Ivan A. Vartanyants. "Coherence properties of focused X-ray beams at high-brilliance synchrotron sources". Journal of Synchrotron Radiation 21, n. 1 (2 novembre 2013): 5–15. http://dx.doi.org/10.1107/s1600577513023850.

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An analytical approach describing properties of focused partially coherent X-ray beams is presented. The method is based on the results of statistical optics and gives both the beam size and transverse coherence length at any distance behind an optical element. In particular, here Gaussian Schell-model beams and thin optical elements are considered. Limiting cases of incoherent and fully coherent illumination of the focusing element are discussed. The effect of the beam-defining aperture, typically used in combination with focusing elements at synchrotron sources to improve transverse coherence, is also analyzed in detail. As an example, the coherence properties in the focal region of compound refractive lenses at the PETRA III synchrotron source are analyzed.

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8

Law, Yuk. "The Optics of Optical Coherence Tomography". JACC: Cardiovascular Imaging 12, n. 12 (dicembre 2019): 2502–4. http://dx.doi.org/10.1016/j.jcmg.2018.07.030.

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Salditt, Tim, Markus Osterhoff, Martin Krenkel, Robin N. Wilke, Marius Priebe, Matthias Bartels, Sebastian Kalbfleisch e Michael Sprung. "Compound focusing mirror and X-ray waveguide optics for coherent imaging and nano-diffraction". Journal of Synchrotron Radiation 22, n. 4 (23 giugno 2015): 867–78. http://dx.doi.org/10.1107/s1600577515007742.

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A compound optical system for coherent focusing and imaging at the nanoscale is reported, realised by high-gain fixed-curvature elliptical mirrors in combination with X-ray waveguide optics or different cleaning apertures. The key optical concepts are illustrated, as implemented at the Göttingen Instrument for Nano-Imaging with X-rays (GINIX), installed at the P10 coherence beamline of the PETRA III storage ring at DESY, Hamburg, and examples for typical applications in biological imaging are given. Characteristic beam configurations with the recently achieved values are also described, meeting the different requirements of the applications, such as spot size, coherence or bandwidth. The emphasis of this work is on the different beam shaping, filtering and characterization methods.

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Ding Chaoliang, 丁超亮, 亓协兴 Qi Xiexing e 潘留占 Pan Liuzhan. "时空相干涡旋中的相干开关". Acta Optica Sinica 42, n. 20 (2022): 2026004. http://dx.doi.org/10.3788/aos202242.2026004.

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Camino, Acner, Pengxiao Zang, Arman Athwal, Shuibin Ni, Yali Jia, David Huang e Yifan Jian. "Sensorless adaptive-optics optical coherence tomographic angiography". Biomedical Optics Express 11, n. 7 (24 giugno 2020): 3952. http://dx.doi.org/10.1364/boe.396829.

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12

Hitzenberger, Christoph K. "Optical coherence tomography in Optics Express [Invited]". Optics Express 26, n. 18 (31 agosto 2018): 24240. http://dx.doi.org/10.1364/oe.26.024240.

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13

Dong, Zachary M., Gadi Wollstein, Bo Wang e Joel S. Schuman. "Adaptive optics optical coherence tomography in glaucoma". Progress in Retinal and Eye Research 57 (marzo 2017): 76–88. http://dx.doi.org/10.1016/j.preteyeres.2016.11.001.

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14

Xiao, Peng, Mathias Fink e Albert Claude Boccara. "Adaptive optics full-field optical coherence tomography". Journal of Biomedical Optics 21, n. 12 (22 settembre 2016): 121505. http://dx.doi.org/10.1117/1.jbo.21.12.121505.

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15

Elliott, D. S. "Optical Coherence and Quantum Optics [Book review]". IEEE Spectrum 33, n. 9 (settembre 1996): 12–13. http://dx.doi.org/10.1109/mspec.1996.535254.

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16

Hermann, B., E. J. Fernández, A. Unterhuber, H. Sattmann, A. F. Fercher, W. Drexler, P. M. Prieto e P. Artal. "Adaptive-optics ultrahigh-resolution optical coherence tomography". Optics Letters 29, n. 18 (15 settembre 2004): 2142. http://dx.doi.org/10.1364/ol.29.002142.

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17

Wojtkowski, Maciej, Patrycjusz Stremplewski, Egidijus Auksorius e Dawid Borycki. "Spatio-Temporal Optical Coherence Imaging – a new tool for in vivo microscopy". Photonics Letters of Poland 11, n. 2 (1 luglio 2019): 44. http://dx.doi.org/10.4302/plp.v11i2.905.

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Optical Coherence Imaging (OCI) including Optical Coherence Tomography (OCT) and Optical Coherence Microscopy (OCM) uses interferometric detection to generate high-resolution volumetric images of the sample at high speeds. Such capabilities are significant for in vivo imaging, including ophthalmology, brain, intravascular imaging, as well as endoscopic examination. Instrumentation and software development allowed to create many clinical instruments. Nevertheless, most of OCI setups scan the incident light laterally. Hence, OCI can be further extended by wide-field illumination and detection. This approach, however, is very susceptible to the so-called crosstalk-generated noise. Here, we describe our novel approach to overcome this issue with spatio-temporal optical coherence manipulation (STOC), which employs spatial phase modulation of the incident light. Full Text: PDF ReferencesL. Wang, P. P. Ho, C. Liu, G. Zhang, and R. R. Alfano, "Ballistic 2-D Imaging Through Scattering Walls Using an Ultrafast Optical Kerr Gate", Science 253, 769-771 (1991). CrossRef D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and et al., "Optical coherence tomography", Science 254, 1178-1181 (1991). CrossRef J. A. Izatt, E. A. Swanson, J. G. Fujimoto, M. R. Hee, and G. M. Owen, "Optical coherence microscopy in scattering media", Opt. Lett. 19, 590-592 (1994). CrossRef D. Borycki, M. Nowakowski, and M. Wojtkowski, "Control of the optical field coherence by spatiotemporal light modulation", Opt. Lett. 38, 4817-4820 (2013). CrossRef D. Borycki, M. Hamkalo, M. Nowakowski, M. Szkulmowski, and M. Wojtkowski, "Spatiotemporal optical coherence (STOC) manipulation suppresses coherent cross-talk in full-field swept-source optical coherence tomography", Biomed. Opt. Express 10, 2032-2054 (2019). CrossRef P. Stremplewski, E. Auksorius, P. Wnuk, L. Kozon, P. Garstecki, and M. Wojtkowski, "In vivo volumetric imaging by crosstalk-free full-field OCT", Optica 6, 608-617 (2019). CrossRef L. Vabre, A. Dubois, and A. C. Boccara, "Thermal-light full-field optical coherence tomography", Opt. Lett. 27, 530-532 (2002). CrossRef M. Laubscher, M. Ducros, B. Karamata, T. Lasser, and R. Salathé, "Video-rate three-dimensional optical coherence tomography", Opt. Express 10, 429-435 (2002). CrossRef Dubois and A. C. Boccara, Full-Field Optical Coherence Tomography, (Springer Berlin Heidelberg, Berlin, Heidelberg, 2008), pp. 565-591. CrossRef O. Thouvenin, K. Grieve, P. Xiao, C. Apelian, and A. C. Boccara, "En face coherence microscopy [Invited]", Biomedical Opt. Express 8, 622-639 (2017). CrossRef F. Fercher, C. K. Hitzenberger, M. Sticker, E. Moreno-Barriuso, R. Leitgeb, W. Drexler, and H. Sattmann, "A thermal light source technique for optical coherence tomography", Optics Commun. 185, 57-64 (2000). CrossRef R. A. Leitgeb, "En face optical coherence tomography: a technology review [Invited]", Biomed Opt Express 10, 2177-2201 (2019). CrossRef J. Fujimoto and W. Drexler, Introduction to Optical Coherence Tomography, (Springer, Berlin, Heidelberg, 2008), pp. 1-45. CrossRef J. A. Izatt, M. A. Choma, and A.-H. Dhalla, Theory of Optical Coherence Tomography, (Springer International Publishing, Cham, 2015), pp. 65-94. CrossRef

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18

Geevarghese, Alexi, Gadi Wollstein, Hiroshi Ishikawa e Joel S. Schuman. "Optical Coherence Tomography and Glaucoma". Annual Review of Vision Science 7, n. 1 (15 settembre 2021): 693–726. http://dx.doi.org/10.1146/annurev-vision-100419-111350.

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Early detection and monitoring are critical to the diagnosis and management of glaucoma, a progressive optic neuropathy that causes irreversible blindness. Optical coherence tomography (OCT) has become a commonly utilized imaging modality that aids in the detection and monitoring of structural glaucomatous damage. Since its inception in 1991, OCT has progressed through multiple iterations, from time-domain OCT, to spectral-domain OCT, to swept-source OCT, all of which have progressively improved the resolution and speed of scans. Even newer technological advancements and OCT applications, such as adaptive optics, visible-light OCT, and OCT-angiography, have enriched the use of OCT in the evaluation of glaucoma. This article reviews current commercial and state-of-the-art OCT technologies and analytic techniques in the context of their utility for glaucoma diagnosis and management, as well as promising future directions.

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19

Kahnt, Maik, Konstantin Klementiev, Vahid Haghighat, Clemens Weninger, Tomás S. Plivelic, Ann E. Terry e Alexander Björling. "Measurement of the coherent beam properties at the CoSAXS beamline". Journal of Synchrotron Radiation 28, n. 6 (5 ottobre 2021): 1948–53. http://dx.doi.org/10.1107/s1600577521009140.

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The CoSAXS beamline at the MAX IV Laboratory is a modern multi-purpose (coherent) small-angle X-ray scattering (CoSAXS) instrument, designed to provide intense and optionally coherent illumination at the sample position, enabling coherent imaging and speckle contrast techniques. X-ray tracing simulations used to design the beamline optics have predicted a total photon flux of 1012–1013 photons s−1 and a degree of coherence of up to 10% at 7.1 keV. The normalized degree of coherence and the coherent flux of this instrument were experimentally determined using the separability of a ptychographic reconstruction into multiple mutually incoherent modes and thus the Coherence in the name CoSAXS was verified. How the beamline can be used both for coherent imaging and XPCS measurements, which both heavily rely on the degree of coherence of the beam, was demonstrated. These results are the first experimental quantification of coherence properties in a SAXS instrument at a fourth-generation synchrotron light source.

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20

Kahnt, Maik, Konstantin Klementiev, Vahid Haghighat, Clemens Weninger, Tomás S. Plivelic, Ann E. Terry e Alexander Björling. "Measurement of the coherent beam properties at the CoSAXS beamline". Journal of Synchrotron Radiation 28, n. 6 (5 ottobre 2021): 1948–53. http://dx.doi.org/10.1107/s1600577521009140.

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The CoSAXS beamline at the MAX IV Laboratory is a modern multi-purpose (coherent) small-angle X-ray scattering (CoSAXS) instrument, designed to provide intense and optionally coherent illumination at the sample position, enabling coherent imaging and speckle contrast techniques. X-ray tracing simulations used to design the beamline optics have predicted a total photon flux of 1012–1013 photons s−1 and a degree of coherence of up to 10% at 7.1 keV. The normalized degree of coherence and the coherent flux of this instrument were experimentally determined using the separability of a ptychographic reconstruction into multiple mutually incoherent modes and thus the Coherence in the name CoSAXS was verified. How the beamline can be used both for coherent imaging and XPCS measurements, which both heavily rely on the degree of coherence of the beam, was demonstrated. These results are the first experimental quantification of coherence properties in a SAXS instrument at a fourth-generation synchrotron light source.

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21

Moxham, Thomas E. J., Aaron Parsons, Tunhe Zhou, Lucia Alianelli, Hongchang Wang, David Laundy, Vishal Dhamgaye, Oliver J. L. Fox, Kawal Sawhney e Alexander M. Korsunsky. "Hard X-ray ptychography for optics characterization using a partially coherent synchrotron source". Journal of Synchrotron Radiation 27, n. 6 (16 ottobre 2020): 1688–95. http://dx.doi.org/10.1107/s1600577520012151.

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Ptychography is a scanning coherent diffraction imaging technique which provides high resolution imaging and complete spatial information of the complex electric field probe and sample transmission function. Its ability to accurately determine the illumination probe has led to its use at modern synchrotrons and free-electron lasers as a wavefront-sensing technique for optics alignment, monitoring and correction. Recent developments in the ptychography reconstruction process now incorporate a modal decomposition of the illuminating probe and relax the restriction of using sources with high spatial coherence. In this article a practical implementation of hard X-ray ptychography from a partially coherent X-ray source with a large number of modes is demonstrated experimentally. A strongly diffracting Siemens star test sample is imaged using the focused beam produced by either a Fresnel zone plate or beryllium compound refractive lens. The recovered probe from each optic is back propagated in order to plot the beam caustic and determine the precise focal size and position. The power distribution of the reconstructed probe modes also allows the quantification of the beams coherence and is compared with the values predicted by a Gaussian–Schell model and the optics exit intensity.

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22

Roberts, Lyle E., Robert L. Ward, Craig Smith e Daniel A. Shaddock. "Coherent Beam Combining Using an Internally Sensed Optical Phased Array of Frequency-Offset Phase Locked Lasers". Photonics 7, n. 4 (28 novembre 2020): 118. http://dx.doi.org/10.3390/photonics7040118.

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Coherent beam combining can be used to scale optical power and enable mechanism-free beam steering using an optical phased array. Coherently combining multiple free-running lasers in a leader-follower laser configuration is challenging due to the need to measure and stabilize large and highly dynamic phase differences between them. We present a scalable technique based on frequency-offset phase locking and digitally enhanced interferometry to clone the coherence of multiple lasers without the use of external sampling optics, which has the potential to support both coherent and spectral beam combining, and alleviates issues of voltage wrapping associated with actuating feedback control using electro-optic modulators. This technique was demonstrated experimentally using a tiled-aperture optical phased array in which the relative output phase of three free-running lasers was stabilized with an RMS output phase stability of λ/104.

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Zhao, Zhiguo, Chaoliang Ding, Yongtao Zhang e Liuzhan Pan. "Spatial-Temporal Self-Focusing of Partially Coherent Pulsed Beams in Dispersive Medium". Applied Sciences 9, n. 17 (3 settembre 2019): 3616. http://dx.doi.org/10.3390/app9173616.

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Partially coherent pulsed beams have many applications in pulse shaping, fiber optics, ghost imaging, etc. In this paper, a novel class of partially coherent pulsed (PCP) sources with circular spatial coherence distribution and sinc temporal coherence distribution is introduced. The analytic formula for the spatial-temporal intensity of pulsed beams generated by this kind of source in dispersive media is derived. The evolution behavior of spatial-temporal intensity of the pulsed beams in water and air is investigated, respectively. It is found that the pulsed beams exhibit spatial-temporal self-focusing behavior upon propagation. Furthermore, a physical interpretation of the spatial-temporal self-focusing phenomenon is given. This is a phenomenon of optical nonlinearity, which may have potential application in laser micromachining and laser filamentation.

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24

Xue, Chaofan, Xiangyu Meng, Yanqing Wu, Yong Wang, Liansheng Wang, Shumin Yang, Jun Zhao e Renzhong Tai. "The wave optical whole process design of the soft X-ray interference lithography beamline at SSRF". Journal of Synchrotron Radiation 25, n. 6 (26 ottobre 2018): 1869–76. http://dx.doi.org/10.1107/s1600577518012833.

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A new spatially coherent beamline has been designed and constructed at the Shanghai Synchrotron Radiation Facility. Here, the design of the beamline is introduced and the spatial coherence is analyzed throughout the whole process by wave optics. The simulation results show good spatial coherence at the endstation and have been proven by experiment results.

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Takahashi, Yoshiyuki, Mitsuharu Iwaya, Yuuki Watanabe e Manabu Sato. "Optical probe using eccentric optics for optical coherence tomography". Optics Communications 271, n. 1 (marzo 2007): 285–90. http://dx.doi.org/10.1016/j.optcom.2006.09.049.

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26

Verstraete, Hans R. G. W., Barry Cense, Rolf Bilderbeek, Michel Verhaegen e Jeroen Kalkman. "Towards model-based adaptive optics optical coherence tomography". Optics Express 22, n. 26 (23 dicembre 2014): 32406. http://dx.doi.org/10.1364/oe.22.032406.

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Kocaoglu, Omer P., Timothy L. Turner, Zhuolin Liu e Donald T. Miller. "Adaptive optics optical coherence tomography at 1 MHz". Biomedical Optics Express 5, n. 12 (6 novembre 2014): 4186. http://dx.doi.org/10.1364/boe.5.004186.

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28

史国华, 史国华, Guohua Shi Guohua Shi, 戴云戴云, Yun Dai Yun Dai, 王玲王玲, Ling Wang Ling Wang, 丁志华丁志华 et al. "Adaptive optics optical coherence tomography for retina imaging". Chinese Optics Letters 6, n. 6 (2008): 424–25. http://dx.doi.org/10.3788/col20080606.0424.

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29

Nguyen, V. Duc, N. Weiss, W. Beeker, M. Hoekman, A. Leinse, R. G. Heideman, T. G. van Leeuwen e J. Kalkman. "Integrated-optics-based swept-source optical coherence tomography". Optics Letters 37, n. 23 (16 novembre 2012): 4820. http://dx.doi.org/10.1364/ol.37.004820.

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Loudon, R. "Coherence and Quantum Optics V". Optica Acta: International Journal of Optics 33, n. 1 (gennaio 1986): 13. http://dx.doi.org/10.1080/716099692.

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31

Petrascheck, D. "Coherence lengths and neutron optics". Physical Review B 35, n. 13 (1 maggio 1987): 6549–53. http://dx.doi.org/10.1103/physrevb.35.6549.

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Petrascheck, D. "On coherence in crystal optics". Physica B+C 151, n. 1-2 (luglio 1988): 171–75. http://dx.doi.org/10.1016/0378-4363(88)90162-3.

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33

Harris, S. E., G. Y. Yin, M. Jain, H. Xia e A. J. Merriam. "Nonlinear optics at maximum coherence". Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences 355, n. 1733 (15 dicembre 1997): 2291–304. http://dx.doi.org/10.1098/rsta.1997.0127.

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Baltă, Florian, Irina-Elena Cristescu, Andrada-Elena Mirescu, George Baltă, Mihail Zemba e Ioana Teodora Tofolean. "Investigation of Retinal Microcirculation in Diabetic Patients Using Adaptive Optics Ophthalmoscopy and Optical Coherence Angiography". Journal of Diabetes Research 2022 (19 gennaio 2022): 1–9. http://dx.doi.org/10.1155/2022/1516668.

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Abstract (sommario):

The current research approaches the retinal microvasculature of healthy volunteers (17 subjects), patients with diabetes mellitus without retinopathy (19 subjects), and of diabetic patients with nonproliferative (17 subjects) and proliferative (21 subjects) diabetic retinopathy, by using adaptive optics ophthalmoscopy and optical coherence ophthalmoscopy angiography. For each imaging technique, several vascular parameters have been calculated in order to achieve a comparative analysis of these imaging biomarkers between the four studied groups. The results suggest that diabetic patients with or without diabetic retinopathy prove signs of retinal arteriole structural alterations, mainly showed by altered values of wall to lumen ratio, calculated for the superior or inferior temporal branch of the central retinal artery, near the optic nerve head, and significant changes of the vascular density in the retinal superficial capillary plexus. Both adaptive optics ophthalmoscopy and optical coherence ophthalmoscopy angiography are providing useful information about the retinal microvasculature from early onset of diabetic disease, having a promising diagnostic and prognostic role in the future.

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Graves, Jennifer S. "Optical Coherence Tomography in Multiple Sclerosis". Seminars in Neurology 39, n. 06 (dicembre 2019): 711–17. http://dx.doi.org/10.1055/s-0039-1700528.

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AbstractOptical coherence tomography (OCT) grew out of a convergence of rapid advancements in femtoseconds optics research and fiber optic commercial technology. The basic concept of OCT is to “see” into tissues using light echoes, analogous to the sound echoes of ultrasonography. Multiple A-scans are assembled into a B-scan two-dimensional image of the tissue of interest. Retina is an ideal tissue for evaluation by OCT, since the eye is designed to minimize light scattering through the anterior chamber and vitreous. OCT has had a significant impact on the field of multiple sclerosis, where it has allowed direct imaging of the myelin-free segments of axons and cell bodies of retinal ganglion cells. Together with precise functional measurements of the afferent visual system, the addition of robust structural measurements of retinal injury has allowed for an unprecedented ability to correlate clinical effects with the degree of neuronal loss. In addition, OCT has proven helpful to distinguish different forms of demyelinating disease, such as multiple sclerosis (MS) and neuromyelitis optica, and has provided ideal outcome measures in remyelination and neuroprotection trials.

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Abouraddy, Ayman F., Aristide Dogariu e Bahaa E. A. Saleh. "Polarization coherence theorem: comment". Optica 6, n. 6 (20 giugno 2019): 829. http://dx.doi.org/10.1364/optica.6.000829.

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Eberly, J. H., X. F. Qian e A. N. Vamivakas. "Polarization coherence theorem: reply". Optica 6, n. 6 (20 giugno 2019): 831. http://dx.doi.org/10.1364/optica.6.000831.

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Piquero, G., M. Santarsiero, R. Martínez-Herrero, J. C. G. de Sande, M. Alonzo e F. Gori. "Partially coherent sources with radial coherence". Optics Letters 43, n. 10 (14 maggio 2018): 2376. http://dx.doi.org/10.1364/ol.43.002376.

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Steinberg, Shlomi, Pradeep Sen e Ling-Qi Yan. "Towards practical physical-optics rendering". ACM Transactions on Graphics 41, n. 4 (luglio 2022): 1–24. http://dx.doi.org/10.1145/3528223.3530119.

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Physical light transport (PLT) algorithms can represent the wave nature of light globally in a scene, and are consistent with Maxwell's theory of electromagnetism. As such, they are able to reproduce the wave-interference and diffraction effects of real physical optics. However, the recent works that have proposed PLT are too expensive to apply to real-world scenes with complex geometry and materials. To address this problem, we propose a novel framework for physical light transport based on several key ideas that actually makes PLT practical for complex scenes. First, we restrict the spatial coherence shape of light to an anisotropic Gaussian and justify this restriction with general arguments based on entropy. This restriction serves to simplify the rest of the derivations, without practical loss of generality. To describe partially-coherent light, we present new rendering primitives that generalize the radiometric radiance and irradiance, and are based on the well-known Stokes parameters. We are able to represent light of arbitrary spectral content and states of polarization, and with any coherence volume and anisotropy. We also present the wave BSDF to accurately render diffractions and wave-interference effects. Furthermore, we present an approach to importance sample this wave BSDF to facilitate bi-directional path tracing, which has been previously impossible. We show good agreement with state-of-the-art methods, but unlike them we are able to render complex scenes where all the materials are new, coherence-aware physical optics materials, and with performance approaching that of "classical" rendering methods.

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Korotkova, Olga, e Franco Gori. "Introduction to the Special Issue on Structured Light Coherence". Photonics 8, n. 10 (19 ottobre 2021): 457. http://dx.doi.org/10.3390/photonics8100457.

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Statistical optics, and optical coherence in particular, developed into a stand-alone branch of physical optics in the second half of the 20th century and has found a number of ground-breaking applications in astronomical measurements, medical diagnostics, environmental remote sensing, and wireless communications [...]

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Zhu, Zhongzhu, Han Xu, Lingfei Hu, Ming Li, Peng Liu, Yuhui Dong e Liang Zhou. "A wave optics model for the effect of partial coherence on coherent diffractive imaging". Journal of Synchrotron Radiation 28, n. 2 (14 gennaio 2021): 499–504. http://dx.doi.org/10.1107/s1600577520015684.

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With the development of fourth-generation synchrotron sources, coherent diffractive imaging (CDI) will be a mainstream method for 3D structure determination at nanometre resolution. The partial coherence of incident X-rays plays a critical role in the reconstructed image quality. Here a wave optics model is proposed to analyze the effect of partial coherence on CDI for an actual beamline layout, based on the finite size of the source and the influence of the optics on the wavefront. Based on this model, the light field distribution at any plane, the coherence between any two points on this plane and CDI experiments can be simulated. The plane-wave CDI simulation result also shows that in order to reconstruct good image quality of complex samples the visibility of the interference fringes of any two points in the horizontal and vertical directions of the incident light field at the sample needs to be higher than 0.95.

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42

Wang, Jianfeng, Eric J. Chaney, Edita Aksamitiene, Marina Marjanovic e Stephen A. Boppart. "Computational adaptive optics for polarization-sensitive optical coherence tomography". Optics Letters 46, n. 9 (21 aprile 2021): 2071. http://dx.doi.org/10.1364/ol.418637.

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43

Ruiz-Lopera, Sebastián, René Restrepo, Carlos Cuartas-Vélez, Brett E. Bouma e Néstor Uribe-Patarroyo. "Computational adaptive optics in phase-unstable optical coherence tomography". Optics Letters 45, n. 21 (27 ottobre 2020): 5982. http://dx.doi.org/10.1364/ol.401283.

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44

Kocaoglu, Omer P., R. Daniel Ferguson, Ravi S. Jonnal, Zhuolin Liu, Qiang Wang, Daniel X. Hammer e Donald T. Miller. "Adaptive optics optical coherence tomography with dynamic retinal tracking". Biomedical Optics Express 5, n. 7 (17 giugno 2014): 2262. http://dx.doi.org/10.1364/boe.5.002262.

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45

Apostol, A., e A. Dogariu. "Near-Field Optics: Coherence Properties of Optical Near Fields". Optics and Photonics News 14, n. 12 (1 dicembre 2003): 22. http://dx.doi.org/10.1364/opn.14.12.000022.

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46

Jian, Yifan, Robert J. Zawadzki e Marinko V. Sarunic. "Adaptive optics optical coherence tomography forin vivomouse retinal imaging". Journal of Biomedical Optics 18, n. 5 (3 maggio 2013): 056007. http://dx.doi.org/10.1117/1.jbo.18.5.056007.

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47

Hradil, Zdeněk, Jaroslav Řeháček, Luis Sánchez-Soto e Berthold-Georg Englert. "Quantum Fisher information with coherence". Optica 6, n. 11 (14 novembre 2019): 1437. http://dx.doi.org/10.1364/optica.6.001437.

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48

Liu, Zhenglin, Lipeng Wan, Yujie Zhou, Yao Zhang e Daomu Zhao. "Progress on Studies of Beams Carrying Twist". Photonics 8, n. 4 (26 marzo 2021): 92. http://dx.doi.org/10.3390/photonics8040092.

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Abstract (sommario):

Optical twist has always been a hot spot in optics since it was discovered in 1993. Twisted beams can be generated by introducing the twist phase into partially coherent beams, or by introducing the twisting phase into anisotropic beams, whose spectral density and degree of coherence will spontaneously rotate during propagation. Unlike conventional beams, twisted beams have unique properties and can be used in many applications, such as optical communications, laser material processing, and particle manipulation. In this paper, we present a review of recent developments on phase studies of beams carrying twist.

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49

Jain, Maneesh, Hui Xia, Guang-Yu Yin, Andrew Merriam e S. E. Harris. "Nonlinear Optics Using Atomic Coherence Effects". Optics and Photonics News 7, n. 12 (1 dicembre 1996): 45. http://dx.doi.org/10.1364/opn.7.12.000045.

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50

Lavoine, J. P., A. Boeglin, S. H. Lin e A. A. Villaeys. "Coherence-population interdependence in nonlinear optics". Physical Review A 38, n. 6 (1 settembre 1988): 2896–909. http://dx.doi.org/10.1103/physreva.38.2896.

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