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4 May 2000 Scanned CO2 laser heating system for infrared scene generation
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Proceedings Volume 3931, Gas, Chemical, and Electrical Lasers and Intense Beam Control and Applications; (2000)
Event: Symposium on High-Power Lasers and Applications, 2000, San Jose, CA, United States
IR scene generators are devices that simulate the IR radiation seen by heat seeking devices and IR detectors. Since the tracking accuracy is essential to heat seeking operation, a realistic high-resolution image is required. Current thermal RI scene generators use resistor array technology to generate an image whose size is on the order of 25mm square. We are building a 600mm X 600mm IR display systems with a scanned laser heating system for devices requiring a larger image size. Three high-powered CO2 lasers are raster-scanned over a thin kapton screen. Rapid modulation of the laser coordinated with the scanning produces a pixilated heated image that emits IR energy. The system is composed of a background heating system with two laser each scanning a 128 X 64 array and a hotspot heating system with one laser scanning a 40 X 40 array. The background system is fixed over the entire screen and simulates environmental IR while the hotspot system can be scanned anywhere on the screen and simulates a target. Convective cooling is used to increase spatial resolution and temporal response. An IR camera provides closed loop optical feedback for the system.
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Susan R. Cooper, Dina C. Birrell, and John K. Eaton "Scanned CO2 laser heating system for infrared scene generation", Proc. SPIE 3931, Gas, Chemical, and Electrical Lasers and Intense Beam Control and Applications, (4 May 2000);

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