Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Infrared radiation detecting systems

Patent ·
OSTI ID:5916663
An infrared radiation detecting system comprises a detector element forming part of a detector incorporating a cold shield and an optical system for imaging infrared radiation from a field of view onto a real image surface spaced from the detector element and relaying the image I from the surface to the detector element is provided with a graticule having markings which are reflective to infrared radiation emitted by the detector. Graticule is located at the image surface so that the graticule markings are imaged onto the detector element in superimposition with the infrared radiation from the field of view.
Assignee:
Barr and Stroud Ltd (United Kingdom)
Patent Number(s):
US 4383173
OSTI ID:
5916663
Country of Publication:
United States
Language:
English