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18 December 2019 A review on the retroreflection reduction techniques
Lei Wang, Qing Ye, Xiaoquan Sun
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Proceedings Volume 11338, AOPC 2019: Optical Sensing and Imaging Technology; 113380Q (2019) https://doi.org/10.1117/12.2542103
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China
Abstract
Retroreflection, which is also known as the cat-eye effect, occurs in many imaging systems. The laser beam that irradiates on the focused photodetector would be reflected along its entranceway, by means of which the focused imaging system could be easily discovered and located. The paper analyzes the present research status of retroreflection reduction techniques. It shows that the related techniques mainly focus on four aspects: defocusing, masking, filtering, and one-way optical device. However, there are still some apparent disadvantages among the above technical schemes, which are generally manifested in the severe loss of imaging quality and the restricted application scope. Along with the rapid development of parallel computing platforms in recent years, computational imaging is widely applied in many fields. The paper proposes two novel configurations of anti-laser reconnaissance imaging systems based on the wavefront coding and the light-field rendering. Applying the computational imaging techniques will hopefully achieve a substantial retroreflection reduction without severely degrading the imaging quality, which shows us a broad prospect.
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Lei Wang, Qing Ye, and Xiaoquan Sun "A review on the retroreflection reduction techniques", Proc. SPIE 11338, AOPC 2019: Optical Sensing and Imaging Technology, 113380Q (18 December 2019); https://doi.org/10.1117/12.2542103
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KEYWORDS
Imaging systems
Retroreflectors
Optical filters
Reconnaissance
Image filtering
Bandpass filters
Computational imaging
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