Multispectral scanner optical system

Details Multispectral scanner optical system Multispectral scanner optical system

1979-03-29

1980-07-29

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250352, 250353, 350 55, 356 72, G01J 100

Patent

active

042152739

ABSTRACT:
Disclosed is an optical system for use in a multispectral scanner of the type used in video imaging devices. Electromagnetic radiation reflected by a rotating scan mirror is focused by a concave primary telescope mirror and collimated by a second concave mirror. The collimated beam is split by a dichroic filter which transmits radiant energy in the infrared spectrum and reflects visible and near infrared energy. The long wavelength beam is filtered and focused on an infrared detector positioned in a cryogenic environment. The short wavelength beam is dispersed by a pair of prisms, then projected on an array of detectors also mounted in a cryogenic environment and oriented at an angle relative to the optical path of the dispersed short wavelength beam.

REFERENCES:
patent: 2895049 (1959-07-01), Astheimer et al.
patent: 3674334 (1972-07-01), Offner
patent: 3927254 (1975-12-01), Lessman
patent: 3963328 (1976-06-01), Abel
patent: 3974383 (1976-08-01), Chapman
patent: 4087689 (1978-05-01), Asawa

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