Integrating 128-element linear imager for the 1 to 5 microns regionUseful charge integration has been achieved in high quality photovoltaic InSb diodes when combined with a FET multiplexing (MUX) scheme. An experimental detector assembly with a linear array of 128 InSb diodes coupled to a FEX MUX has been developed. The first stage J-FET preamp, pixel reset switch, MUX, and the InSb array are contained in a hybrid microcircuit of compact dimensions. A low noise preamplifier topology which capitalizes on the low video line capacitance inherent with hybrid fabrication techniques is also utilized. Measurements indicate a signal-to-noise ratio of over 1000:1 and response uniformity of + or - 2 percent. Sample images show subtle detail which supports the estimated radiometric sensitivity of 0.01 K.
Document ID
19830041383
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Bailey, G. C. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)