29 August 2009 The design for the laser detection and warning optical system
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Proceedings Volume 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging; 738254 (2009) https://doi.org/10.1117/12.837222
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China
Abstract
Here we present a new optical system for the demands of laser detection and warning optical system which has a large field-of-view (FOV). A staring imaging laser detecting and warning system is formed by using 2-channel uncooled infrared focal plane detectors. In this system, the operating wavelength range is 3~5 microns, and full angle of view is up to 60 degrees. The largest aperture is 30mm and the photosensitive surface diameter of PIN photoelectric detector is line array dimension nearly 12mm. And there are also composed of narrow band filters and signal processing system. A all reflective structure with three elements is used in the object lens to enlarge FOV and back working range, in the head of which the negative mirror have the effect of balancing aberration and deviating rays like a prism. And a standard hyperhemisphere immersion lens with high refractive index is put behind the object lens to satisfy the receiving of a detector with smaller photosensitive surface. The analyzed results show that the image height is 60mm. It redounds to reduce the power of laser and enhances the distance detected.
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Dongmei Li, Guangliang Xiong, "The design for the laser detection and warning optical system", Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 738254 (29 August 2009); doi: 10.1117/12.837222; https://doi.org/10.1117/12.837222
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