Photography – With exposure objective focusing means – focusing aid – or... – Having accumulation photoarray and time control means
Reexamination Certificate
2005-03-22
2005-03-22
Perkey, W. B. (Department: 2851)
Photography
With exposure objective focusing means, focusing aid, or...
Having accumulation photoarray and time control means
C396S099000
Reexamination Certificate
active
06871018
ABSTRACT:
A focus detection device includes line sensors which photoelectrically convert and integrate light from an object and output an image signal; monitor sensors, provided adjacent to the line sensors, which monitor an integrated value of the adjacent line sensors; a control device which amplifies an output of each monitor sensor and outputs a monitor signal, and terminates integration of the line sensor corresponding to the monitor sensor when the monitor signal reaches a predetermined termination value; and a gain adjustment device which adjusts a gain level of the control device in accordance with each integration time during integration of the line sensor. The gain adjustment device adjusts the gain level of the control device so that an appropriate integrated value of the line sensor becomes an approximately predetermined value when the monitor signal reaches the predetermined termination value regardless of the integration time.
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Greenblum & Bernstein P.L.C.
PENTAX Corporation
Perkey W. B.
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