Photometry apparatus and camera

Details Photometry apparatus and camera Photometry apparatus and camera

2007-10-10

2011-12-13

Tran, Sinh (Department: 2622)

Television

Camera, system and detail

Optics

C348S345000, C398S111000, C398S089000

Reexamination Certificate

active

08077251

ABSTRACT:
This invention allows measuring the spectral state of an object more accurately even at low luminance, and implementing high-precision focus detection. A photometry apparatus includes a diffusing optical member which is inserted in the optical path of a photographing lens and has a diffusing surface, and a light unit which receives diffused light having passed through the diffusing surface, and has a first light receiving portion, and a second light receiving portion whose receivable light energy is smaller than that of the first light receiving portion. The first and second light receiving portions are so arranged as to make the parallax of the second light receiving portion with respect to the optical axis of the photographing lens smaller than that of the first light receiving portion.

REFERENCES:
patent: 4482230 (1984-11-01), Magariyama et al.
patent: 4623932 (1986-11-01), Inoue et al.
patent: 5589908 (1996-12-01), Irie
patent: 7515199 (2009-04-01), Kawai et al.
patent: 2002/0006281 (2002-01-01), Owada
patent: 2004/0004670 (2004-01-01), Yamashita
patent: 01-045883 (1989-10-01), None
patent: 3363683 (2002-10-01), None
patent: 2006-146081 (2006-06-01), None
patent: 2006-261928 (2006-09-01), None
The above references were cited in a Oct. 11, 2011 Japanese Office Action, which is enclosed without English Translation, that issued in Japanese Patent Application No. 2006-304411.

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