Multi-Band Infrared Camera Systems

摘要

The program resulted in one of the first IR camera systems to utilize a uniqueMOS addressable focal plane array with full TV resolution, electronic control capability, and windowing capability. Two systems were delivered, each with two different camera heads: a Stirling-cooled 3-5 um band head and a liquid nitrogen-cooled, filter-wheel-based, 1.5-5 um band head. Signal processing features include averaging up to 16 frames, flexible compensation modes, gain and offset control, and real-time dither. The primary digital interface is a Hewlett-Packard standard GPID (IEEE-488) port that is used to upload and download data. The FPA employs an X-Y addressed PtSi photodiode array, CMOS horizontal and vertical scan registers, horizontal signal line (HSL) buffers followed by a high-gain pre-amplifier and a depletion NMOS output amplifier. The 640 z 480 MOS X-Y addressed FPA has a high degree of flexibility in operational modes. By changing the digital data pattern applied to the vertical scan register, the FPA can be operated in either an interlaced or non-interlaced format. The thermal sensitivity performance of the second system's Stirling-cooled head was the best of the systems produced. (MM).