A customizable commercial miniaturized 320×256 indium gallium arsenide shortwave infrared camera

Shih-Che Huang; Matthew O'Grady; Joseph V. Groppe; Martin H. Ettenberg; Robert M. Brubaker

doi:10.1117/12.560058

21 October 2004 A customizable commercial miniaturized 320×256 indium gallium arsenide shortwave infrared camera

Shih-Che Huang, Matthew O'Grady, Joseph V. Groppe, Martin H. Ettenberg, Robert M. Brubaker

Proceedings Volume 5563, Infrared Systems and Photoelectronic Technology; (2004) https://doi.org/10.1117/12.560058
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

The design and performance of a commercial short-wave-infrared (SWIR) InGaAs microcamera engine is presented. The 0.9-to-1.7 micron SWIR imaging system consists of a room-temperature-TEC-stabilized, 320x256 (25 μm pitch) InGaAs focal plane array (FPA) and a high-performance, highly customizable image-processing set of electronics. The detectivity, D*, of the system is greater than 10¹³ cm-&sqrt;Hz/W at 1.55 μm, and this sensitivity may be adjusted in real-time over 100 dB. It features snapshot-mode integration with a minimum exposure time of 130 μs. The digital video processor provides real time pixel-to-pixel, 2-point dark-current subtraction and non-uniformity compensation along with defective-pixel substitution. Other features include automatic gain control (AGC), gamma correction, 7 preset configurations, adjustable exposure time, external triggering, and windowing. The windowing feature is highly flexible; the region of interest (ROI) may be placed anywhere on the imager and can be varied at will. Windowing allows for high-speed readout enabling such applications as target acquisition and tracking; for example, a 32x32 ROI window may be read out at over 3500 frames per second (fps). Output video is provided as EIA170-compatible analog, or as 12-bit CameraLink-compatible digital. All the above features are accomplished in a small volume < 28 cm³, weight < 70 g, and with low power consumption < 1.3 W at room temperature using this new microcamera engine. Video processing is based on a field-programmable gate array (FPGA) platform with a soft-embedded processor that allows for ease of integration/addition of customer-specific algorithms, processes, or design requirements. The camera was developed with the high-performance, space-restricted, power-conscious application in mind, such as robotic or UAV deployment.

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Shih-Che Huang, Matthew O'Grady, Joseph V. Groppe, Martin H. Ettenberg, and Robert M. Brubaker "A customizable commercial miniaturized 320×256 indium gallium arsenide shortwave infrared camera", Proc. SPIE 5563, Infrared Systems and Photoelectronic Technology, (21 October 2004); https://doi.org/10.1117/12.560058

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KEYWORDS

Cameras

Video

Staring arrays

Short wave infrared radiation

Field programmable gate arrays

Indium gallium arsenide

Video processing

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