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Closed-Cycle Refrigeration for an Airborne Illuminator

  • F. F. Chellis
  • T. P. Hosmer
  • E. Keller
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 16)

Abstract

The U.S. Army’s NVASS Night Vision System is a helicopter-mounted, direct-view, night-vision reconnaissance system. An infrared illuminator consisting of a closed-cycle cooler, diode array, vacuum chamber, vac-ion pump, and pulsing electronics is mounted on the nose of a helicopter to provide covert illumination on the target scene. Reflected energy is sensed by a range-gated image-intensifier tube through a viewer assembly which extends from the crew compartment below the helicopter. Also extending below the helicopter is a ruby laser which performs ranging and target-designation functions. A digital computer displays target coordinates in UTM format. The operator views a fixed field-of-view scene presented by the image-intensifier tube through a binocular eyepiece. He can control the system, including illuminator, viewer, and laser, to scan a full 360° in azimuth and 0 to 70° in elevation.

Keywords

Heat Load Heat Station Refrigeration System Standby Mode Harmonic Drive 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Reference

  1. 1.
    H. O. McMahon and W. E. Gifford, in: Advances in Cryogenic Engineering, Vol. 5, Plenum Press, New York (1960), p. 354.Google Scholar

Copyright information

© Springer Science+Business Media New York 1971

Authors and Affiliations

  • F. F. Chellis
    • 1
  • T. P. Hosmer
    • 1
  • E. Keller
    • 2
  1. 1.Cryogenic Technology, Inc.WalthamUSA
  2. 2.Texas Instruments Inc.DallasUSA

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