Taking lens having focus determination optical system

Details Taking lens having focus determination optical system Taking lens having focus determination optical system

2006-10-24

2006-10-24

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S216000, C348S345000, C348S357000, C396S121000

Reexamination Certificate

active

07126098

ABSTRACT:
The taking lens comprises a picture-taking optical system, which allows object light to enter an image-capturing element for picture-taking of a camera, and a focus determination optical system, which splits the object light and allows the split light to enter a focus status determination image-capturing element. The taking lens includes a picture-taking optical length adjusting device, which adjusts an optical length of the picture-taking optical system, and a focus determination optical length adjusting device, which adjusts an optical length of the focus determination optical system. It is hence possible to adjust the respective optical lengths separately and facilitates adjustments at the time of shipment.

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patent: 6689998 (2004-02-01), Bremer
patent: 2002/0140839 (2002-10-01), Yahagi
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patent: 7-60211 (1995-06-01), None
patent: WO 02/08685 (2002-01-01), None

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