Illumination – Light source and modifier – Including reflector
Patent
1996-07-31
1998-10-27
Quach, Y My
Illumination
Light source and modifier
Including reflector
362299, F21V 904
Patent
active
058269746
ABSTRACT:
A spherical illuminator (10, 40, 50, 60) having an upper diffuser (17, 47, 56, 62) with a concave surface, and having either an opposing reflector (18, 41) or an opposing lower diffuser (57, 63) with a concave surface. The two concave surfaces are placed so that their concavities form a substantially spherical viewing area into which the object under inspection is placed. The upper diffuser (10, 40, 50, 60) has a viewing aperture. It transmits light uniformly to the object from approximately two-pi steradians. The reflector (18, 41) or the lower diffuser (57, 63) provides light to the object in another two-pi steradians, resulting in nearly four-pi steradians of illumination.
REFERENCES:
patent: 3427447 (1969-02-01), Clark
patent: 3712979 (1973-01-01), Padgitt
patent: 4729079 (1988-03-01), Maylotte
patent: 5051872 (1991-09-01), Anderson
patent: 5201576 (1993-04-01), Squyres
Donaldson Richard L.
Kesterson James C.
Quach Y My
Reed Julie L.
Texas Instruments Incorporated
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