Liquid crystal writable gratings for beam steering

Yali Gao; Mingwei Li; Yongji Shi; Fang Ye

doi:10.1117/12.866669

22 October 2010 Liquid crystal writable gratings for beam steering

Yali Gao, Mingwei Li, Yongji Shi, Fang Ye

Proceedings Volume 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology; 76581V (2010) https://doi.org/10.1117/12.866669
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

Liquid crystal writable grating technology is being developed for beam steering in laser radar systems. It is ability to steer broad-spectral -band radiation for us in passive sensors. There is potential for these devices in microscan systems because there is little or no dispersion for the small scan angles required in microscanning. The dispersion that is less than the resolution of the sensor considered here. For large angle steering, the dispersion correction or a narrowing of the spectral bandwidth is required. The degradation in sensitivity resulting from narrowing the spectral bandwidth is considered. A high quantum efficiently step-stare sensor with a two-dimensional focal plane array responsive over a narrow spectral width can achieve the same sensitivity as current linear scanning sensors while being able to steer the field of view(FOV) over a larger field of regard with no moving parts. A promising approach for steering a narrow FOV with broad spectral content and good resolution is described.

Citation Download Citation

Yali Gao, Mingwei Li, Yongji Shi, and Fang Ye "Liquid crystal writable gratings for beam steering", Proc. SPIE 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, 76581V (22 October 2010); https://doi.org/10.1117/12.866669

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KEYWORDS

Sensors

Liquid crystals

Beam steering

Birefringence

Detector arrays

Phase shifts

Staring arrays

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