Spherical illuminator

Details Spherical illuminator Spherical illuminator

1995-06-07

1997-05-13

Quach, Y. My

Illumination

Housing

Transparent globe type

362300, 362355, 356236, F21S 100

Patent

active

056285590

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: 1184952 (1916-05-01), Hipkins
patent: 2415514 (1947-02-01), Mayes
patent: 3610916 (1971-10-01), Meehan
patent: 5201576 (1993-04-01), Squyres

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