Spherical illuminator

Details Spherical illuminator Spherical illuminator

1994-11-10

1997-03-25

Quach, Y. My

Illumination

Revolving

362307, 362355, 356236, F21V 704, F21V 800

Patent

active

056137532

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: 5051872 (1991-09-01), Anderson
patent: 5201576 (1993-04-01), Squyres

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