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Optical Engineering

Modeling and analysis of a high-performance midwave infrared panoramic periscope
Author(s): Jonathan M. Nichols; James R. Waterman; Raghu P. Menon; John Devitt
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Paper Abstract

A high-resolution midwave infrared panoramic periscope sensor system has been developed. The sensor includes an f/2.5 catadioptric optical system that provides a field of view with 360-deg horizontal azimuth and -10- to +30-deg elevation without requiring moving components (e.g., rotating mirrors). The focal plane is a 2048×2048, 15-µm-pitch InSb detector operating at 80 K. An onboard thermoelectric reference source allows for real-time nonuniformity correction using the two-point correction method. The entire system (detector-Dewar assembly, cooler, electronics, and optics) is packaged to fit in an 8-in.-high, 6.5-in.-diameter volume. This work describes both the system optics and the electronics and presents sample imagery. We model both the sensor's radiometric performance, quantified by the noise-equivalent temperature difference, and its resolution performance. Model predictions are then compared with estimates obtained from experimental data. The ability of the system to resolve targets as a function of imaged spatial frequency is also presented.

Paper Details

Date Published: 1 November 2010
PDF: 9 pages
Opt. Eng. 49(11) 113202 doi: 10.1117/1.3505866
Published in: Optical Engineering Volume 49, Issue 11
Show Author Affiliations
Jonathan M. Nichols, U.S. Naval Research Lab. (United States)
James R. Waterman, U.S. Naval Research Lab. (United States)
Raghu P. Menon, RemoteReality Corp. (United States)
John Devitt, L3 Cincinnati Electronics (United States)

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