Modification, testing, and calibration of infrared search and target designator hardware received from NSWC
By: E. C. Crittenden, Jr., and A. W. Cooper
Contributors: Cooper, Alfred William Madison; Naval Postgraduate School (U.S.). Dept. of Physics
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1989
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 28
Subjects: TEMPERATURE CONTROL; INFRARED DETECTORS
Other titles: NPS-61-89-011CR.
Description: The detecting system of the IRST(Infrared Search and Track), as received at the NPG,      was inoperative because of failure of the cooling engine and detector Dewar flask thermal      insulation. This system has now been converted to liquid nitrogen cooling with foam thermal      insulation and has been successfully operated with the scanning head rotating. All surfaces      are now temperature controlled and the system is provided with automatic controls to      prevent thermal runaway during cool-down or warm-up. The present system eliminates the      inner germanium window of the former Dewar flask. Besides simplifying the structure, this      permits imaging closer objects than was previously possible. The optical system of the      Schmidt telescope has been tested with a collimating system, and by imaging of real objects      at finite distances. A system has been provided for relative calibration and identification of      the position of the 180 individual detector elements, and the relative response of each      element measured at the detector and at the output of its preamplifier. Signals obtained from      a heated Calrod source and from clouds and the surrounding terrain have been recorded      with the optical system rotating. (edc)
Notes: Cover title.

"NPS-61-7-89-011CR."

"May 1989."

"Final report for period May 1986 to Feb. 1988."

AD-A217 920.

Includes bibliographical references (p. 27)

aq/aq cc:9116 04/14/97.