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Proceedings Paper

Microscan based on liquid crystal optical characteristics
Author(s): Yi Zhang; Baomin Zhang; Lianfa Bai; Weixian Qian
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Paper 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.

Paper Details

Date Published: 25 September 2003
PDF: 5 pages
Proc. SPIE 5286, Third International Symposium on Multispectral Image Processing and Pattern Recognition, (25 September 2003); doi: 10.1117/12.538810
Show Author Affiliations
Yi Zhang, Nanjing Univ. of Science and Technology (China)
Baomin Zhang, Nanjing Univ. of Science and Technology (China)
Lianfa Bai, Nanjing Univ. of Science and Technology (China)
Weixian Qian, Nanjing Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 5286:
Third International Symposium on Multispectral Image Processing and Pattern Recognition
Hanqing Lu; Tianxu Zhang, Editor(s)

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