Photography – With exposure objective focusing means – focusing aid – or... – Optical detail with photoelement system
Reexamination Certificate
2005-09-01
2009-11-10
Koval, Melissa J (Department: 2862)
Photography
With exposure objective focusing means, focusing aid, or...
Optical detail with photoelement system
C396S121000
Reexamination Certificate
active
07616878
ABSTRACT:
An optical apparatus is disclosed, which is suitable for the focus detection by the TTL phase difference detection method, and capable of producing a pair of phase difference images for focus detection with high accuracy. The optical apparatus comprises a deflection optical element which deflects at least one of first and second luminous fluxes with respect to the other. The first and second luminous fluxes are transmitted respectively through first and second areas of an exit pupil of an optical system, and then reach a photoelectric conversion element. The deflection direction of the luminous flux is different from the division direction of the first and second areas.
REFERENCES:
patent: 4373791 (1983-02-01), Araki
patent: 4572476 (1986-02-01), Oinoue
patent: 4916473 (1990-04-01), Mukai et al.
patent: 5597999 (1997-01-01), Kinba et al.
patent: 5623365 (1997-04-01), Kuba
patent: 5701005 (1997-12-01), Meyers
patent: 6124924 (2000-09-01), Feldman et al.
patent: 6175692 (2001-01-01), Onoda et al.
patent: 6297909 (2001-10-01), Sensui
patent: 6574437 (2003-06-01), Sensui
patent: 6700316 (2004-03-01), Taniuchi et al.
patent: 6766112 (2004-07-01), Kuwata et al.
patent: 6933978 (2005-08-01), Suda
patent: 7271956 (2007-09-01), Ishii
patent: 2002/0196547 (2002-12-01), Kleemann et al.
patent: 1345062 (2003-09-01), None
S. Mendis, et al., “CMOS Active Pixel Image Sensor”, IEEE Transactions on Electronic Devices, vol. 41, No. 3, Mar. 1994, pp. 452-453.
E.R. Fossum, “CMOS Image Sensors: Electronic Camera-on-a-Chip”, IEEE Transactions on Electronic Devices, vol. 44, No. 10, Oct. 1997, pp. 1689-1698.
Hecht, Eugene, “Schaum's Outline of Theory and Problems of Optics”, McGraw-Hill, 1975, p. 175.
Canon Kabushiki Kaisha
Cowan Liebowitz & Latman P.C.
Koval Melissa J
Smith Linda B
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