High frame rate imaging using uncooled optical readout photomechanical IR sensor

Jack P. Salerno

doi:10.1117/12.718785

14 May 2007 High frame rate imaging using uncooled optical readout photomechanical IR sensor

Jack P. Salerno

Proceedings Volume 6542, Infrared Technology and Applications XXXIII; 65421D (2007) https://doi.org/10.1117/12.718785
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

Agiltron has produced a 280x240 photomechanical sensor array with an optical readout incorporating visible light cameras for both MWIR and LWIR imaging at speeds up to 1,000 frames per second. The photomechanical sensor is essentially a transducer that converts the image-induced temperature change into a mechanical deflection actuated by a micro-cantilevered beam. This defection is measured by an optical readout and converted into an electronic image. The photomechanical sensor requires no external drive for operation and therefore creates no bottleneck for readout data rate. It operates uncooled at widely varying ambient temperature. The use of off-the-shelf high speed visible light sensors allows for high frame rate imaging with no need for custom electronics or ROIC. Results on detection of rapid occurrence events, such as gunfire and rocket travel, are reported. The influence of detector sensitivity and time constant on the experimental imaging is discussed. Analysis of the frequency response of the photomechanical sensor is presented.

Citation Download Citation

Jack P. Salerno "High frame rate imaging using uncooled optical readout photomechanical IR sensor", Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 65421D (14 May 2007); https://doi.org/10.1117/12.718785

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