Television – Camera – system and detail – Optics
Reexamination Certificate
2005-08-23
2005-08-23
Garber, Wendy R. (Department: 2612)
Television
Camera, system and detail
Optics
C359S625000, C396S111000
Reexamination Certificate
active
06933978
ABSTRACT:
A focus detecting device comprises a first photoelectric conversion section for performing photoelectric conversion of a light beam emitted from a first pupil area of a image pickup optical unit, a second photoelectric conversion section for performing photoelectric conversion of a light beam emitted from a second pupil area different from the first pupil area, a light intercepting section having openings for allowing passage of a portion of light in the first pupil area and for allowing passage of a portion of light in the second pupil area, and a detecting section for detecting a focus condition of the image pickup optical unit on the basis of photoelectric conversion outputs of the first photoelectric conversion means and the second photoelectric conversion sections. For example, when the image pickup optical unit has a large defocus quantity, the light intercepting section is set in an optical path for focus detection.
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S. Mendis, et al., “CMOS Active Pixel Image Sensor,” IEEE Transactions on Electron Devices, vol. 41, No. 3, Mar. 1994, pp. 452-453.
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Garber Wendy R.
Jerabek Kelly L.
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