Optical apparatus and beam splitter

Details Optical apparatus and beam splitter Optical apparatus and beam splitter

2006-09-26

2006-09-26

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S216000, C250S2140AG, C250S2140LS, C348S251000, C382S274000

Reexamination Certificate

active

07112779

ABSTRACT:
An optical apparatus is disclosed, which can take high-quality images by using light transmitted through a beam splitter. The optical apparatus comprises a light-receiving element and a beam splitter. The first surface of the beam splitter reflects part of incident light and transmits the other part of the incident light toward the light-receiving element. The second surface transmits other incident light other than the incident light to the first surface toward the light-receiving element. The transmittance of the second surface is set so that a light amount distribution on the light-receiving element may be substantially even in a case where the light is incident to the first and second surfaces from an object having a substantially even luminance.

REFERENCES:
patent: 4520395 (1985-05-01), Abe
patent: 4639781 (1987-01-01), Rucci et al.
patent: 6205259 (2001-03-01), Komiya et al.
patent: 6825882 (2004-11-01), Shono
patent: 6940546 (2005-09-01), Gallagher
patent: 2003140246 (2003-05-01), None

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