Microscan based on liquid crystal optical characteristics

Yi Zhang; Baomin Zhang; Lianfa Bai; Weixian Qian

doi:10.1117/12.538810

25 September 2003 Microscan based on liquid crystal optical characteristics

Yi Zhang, Baomin Zhang, Lianfa Bai, Weixian Qian

Proceedings Volume 5286, Third International Symposium on Multispectral Image Processing and Pattern Recognition; (2003) https://doi.org/10.1117/12.538810
Event: Third International Symposium on Multispectral Image Processing and Pattern Recognition, 2003, Beijing, China

Abstract

In staring Infrared Focal Plane Array (IRFPA) imaging system, the spatial frequency of the scene is always more than half of the sampling frequency, thus aliasing formed. Usually, micro-scanning apparatus are used to reduce the aliased signal energy. When micro-scanning, mechanical scan mirror often used to steer the field-of-view (FOV) of the imaging system over a fraction of the pixel distance. Mechanical equipment is usually large, heavy, complex, expensive and especially less reliability. While, liquid crystal can be used to make a non-mechanical light beam steerer for micro-scan. In this paper, we analyzed the infrared spectrum characteristic and the electro-optical reaction of liquid crystal, and introduced the realization of the light beam steerer.

Citation Download Citation

Yi Zhang, Baomin Zhang, Lianfa Bai, and Weixian Qian "Microscan based on liquid crystal optical characteristics", Proc. SPIE 5286, Third International Symposium on Multispectral Image Processing and Pattern Recognition, (25 September 2003); https://doi.org/10.1117/12.538810

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