Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1988-03-03
1989-09-05
Church, Craig E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
350432, 2503381, G01J 100
Patent
active
048641375
ABSTRACT:
An optical sensing system is described which generally comprises an infrared sensor, and a curved diffraction-limited window disposed in front of the sensor such that the optical axis of the sensor is parallel to and displaced from the symmetry axis of the window. The window has an inner radius of curvature which is non-concentric with the outer radius of curvature in order to remove the optical power of the window. Additionally, the window is provided with an aspheric profile outer surface, in order to correct for spherical aberrations in the window. The window is made out of germanium and is particularly useful for a sensor which has an 8-12 micron infrared radiation detection band width.
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Hughes Aircraft Document entitled, "Night Vision System", 1 page.
Church Craig E.
Freeman John C.
Hughes Aircraft Company
Meltzer Mark J.
Streeter William J.
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