Surface damage effect detection of sensor in optical lens based on cat-eye effect

Yanzhong Zhao; Huayan Sun; Suolin Gu; Pengshan Fan

doi:10.1117/12.885323

31 December 2010 Surface damage effect detection of sensor in optical lens based on cat-eye effect

Yanzhong Zhao, Huayan Sun, Suolin Gu, Pengshan Fan

Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 75444O (2010) https://doi.org/10.1117/12.885323
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China

Abstract

As the damage region of a sensor can be regarded as some sort of anomalistic aperture diaphragm, the reflectivity model of the sensor can be established, where the optical path of a surface damage detection system can be taken as a propagation process for a plane wave through a defocused optical lens and is reflected back to the return place. Based on the theory of angular spectrum diffraction, the diffraction transmission formulas for a plane wave through the cat-eye system can be derived by taking two-dimensional discrete Fourier transfer. The regulations on the variation of the intensity distribution of the cat-eye reflected light with different damage conditions of the sensor can then be given, and the effect of the focal shift can be analyzed. Experiment results show the intensity distribution of cat-eye reflected light has a direct relationship with the profile of the damage region and the amplificatory effect for the small damage region is of direct ratio with the focal shift. Moreover, the proposed method can be straightforwardly utilized for the surface damage effect detection of a sensor in optical lens without disconnecting it.

Citation Download Citation

Yanzhong Zhao, Huayan Sun, Suolin Gu, and Pengshan Fan "Surface damage effect detection of sensor in optical lens based on cat-eye effect", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75444O (31 December 2010); https://doi.org/10.1117/12.885323

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KEYWORDS

Sensors

Diffraction

Mirrors

Reflectivity

Retroreflectors

Prisms

MATLAB

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