Brilliance control apparatus of light source in an optical scann

Details Brilliance control apparatus of light source in an optical scann Brilliance control apparatus of light source in an optical scann

1994-06-07

1996-07-16

Phan, James

Optical: systems and elements

Light control by opaque element or medium movable in or...

359196, 359885, 355 67, 355 71, 362223, 362260, 362347, 362351, G02B 2602, F21V 1714

Patent

active

055372406

ABSTRACT:
A brilliance control apparatus of light source in an optical scanner particularly contemplating for a transparency scanner includes a generally rectangular lamp stand and a lamp shade which has an asymmetrical curvature surface and has a black reflector with a curved surface disposed therein. And is capable of performing filtering and darkening processes at the same time.

REFERENCES:
patent: 4113379 (1978-09-01), Harada et al.
patent: 5205632 (1993-04-01), Crinion
patent: 5355198 (1994-10-01), Saito

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