Thermal imagers

Details Thermal imagers Thermal imagers

1987-08-11

1989-02-28

LaRoche, Eugene R.

Radiant energy

Infrared-to-visible imaging

Including means for scanning field of view

350286, G02B 2610, G02B 504

Patent

active

048088234

ABSTRACT:
An anamorphic optical system for use in a thermal imager with a sprite detector includes two or more optical elements, preferably prisms, which are shaped and positioned so that change in their refractive index with temperature and/or wavelength results in a lateral shifting of the output energy substantially without any change in direction. The energy passes through a focussing lens to the detector. As a result, the lateral shifting of the energy output by the anamorphic system does not affect the position of the image on the detector. This compensates for the effect of variations in refractive index of the materials of which the prisms are made, as a function of wavelength and/or temperature.

REFERENCES:
patent: 4679891 (1987-07-01), Roberts

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