Blur film assembly for infrared optical applications

Details Blur film assembly for infrared optical applications Blur film assembly for infrared optical applications

1996-11-13

1999-02-02

Spyrou, Cassandra C.

Optical: systems and elements

Having significant infrared or ultraviolet property

359599, 250351, G02B 100

Patent

active

058673075

ABSTRACT:
A blur film is made of a polymeric film material transmissive to infrared energy of a selected waveband, which is affixed to a surface of a substrate transmissive to energy of the same selected infrared waveband. The blur film has a texture or a plurality of lenslets thereon, where the surface of each lenslet is a surface of revolution. In a spatial-filter wheel application, the blur film and substrate are affixed to a support, which in turn is rotatably mounted on a drive. The support is structured such that a portion of its circumference is covered by the blur film and a portion of its circumference is not covered by the blur film. The spatial-filter wheel is rotated in front of a detector to produce alternating blurred and direct images on the detector.

REFERENCES:
patent: 5051591 (1991-09-01), Trotta et al.
patent: 5373151 (1994-12-01), Eckel, Jr. et al.
patent: 5696630 (1997-12-01), Hayashi

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