Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reexamination Certificate
2008-12-02
2009-11-17
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
C250S201400, C250S201700
Reexamination Certificate
active
07619189
ABSTRACT:
An imaging apparatus executes AF control without affecting a video signal and prevents video signal qualities in an in-focus state from decreasing. An optical path separation unit2separates light from a subject into first and second light beams. A first imaging unit3generates a first signal using the first beam. A second imaging unit7generates a second signal using the second beam. A control unit14generates a contrast evaluation value based on the second signal while changing an optical-path length of the second light beam by back-or-fourth moving the AF-purpose imaging unit7and detects a maximum contrast evaluation value, and executes focus control over an optical system1based on the optical-path length corresponding to the detected value. An imaging-purpose signal generation unit15generates an imaging-purpose video signal using only the first signal in an out-of-focus state, and using the first and second signals in an in-focus state.
REFERENCES:
patent: 2005/0068453 (2005-03-01), Sasakura
patent: 2005/0258335 (2005-11-01), Oshiro et al.
patent: 8-50227 (1996-02-01), None
patent: 2000-330012 (2000-11-01), None
patent: 2005-106962 (2005-04-01), None
Panasonic Corporation
Pyo Kevin
Wenderoth , Lind & Ponack, L.L.P.
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