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Proceedings Paper

A 640 × 512 InGaAs camera for range-gated and staring applications
Author(s): Tara J. Martin; Robert M. Brubaker; Vincent Burzi; Martin H. Ettenberg; Keith Forsyth; Joseph Groppe; Mark Lin; Thomas Sudol
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Paper Abstract

We report on a 640 x 512 pixel, 25 μm pitch, InGaAs focal plane array based camera with the ability to perform range-gated imaging, while also allowing integration times longer than 32 ms for imaging in a staring mode at video rates. The combination of gated and video imaging is achieved through a high bandwidth pixel with a capacitive transimpedance amplifier (CTIA) design. The CTIA pixel may be switched between two feedback capacitor sizes to allow two different sensitivities and capacities, depending on the illumination conditions. Anti-blooming is included in the pixel to prevent charge spreading from oversaturated pixels. All pixels are gated simultaneously for "snapshot" exposure. The all solid-state gated camera is very reliable, in addition to being small and lightweight. The low dark current and high bandwidth of the InGaAs photodetectors enables both high sensitivity imaging at long exposure times and high bandwidth at short exposure times. The spectral response of InGaAs extends from 0.9 μm to 1.7 μm, allowing the use of eye-safe commercially available pulsed lasers with 1.5 μm wavelength, several millijoule pulse energies, and nanosecond scale pulse durations.

Paper Details

Date Published: 17 May 2006
PDF: 10 pages
Proc. SPIE 6206, Infrared Technology and Applications XXXII, 620609 (17 May 2006); doi: 10.1117/12.666021
Show Author Affiliations
Tara J. Martin, Sensors Unlimited, Goodrich Corp. (United States)
Robert M. Brubaker, Sensors Unlimited, Goodrich Corp. (United States)
Vincent Burzi, Sensors Unlimited, Goodrich Corp. (United States)
Martin H. Ettenberg, Sensors Unlimited, Goodrich Corp. (United States)
Keith Forsyth, Sensors Unlimited, Goodrich Corp. (United States)
Joseph Groppe, Sensors Unlimited, Goodrich Corp. (United States)
Mark Lin, Sensors Unlimited, Goodrich Corp. (United States)
Thomas Sudol, Sensors Unlimited, Goodrich Corp. (United States)


Published in SPIE Proceedings Vol. 6206:
Infrared Technology and Applications XXXII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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