Focus adjustment apparatus

Details Focus adjustment apparatus Focus adjustment apparatus

2006-11-29

2009-08-25

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

With support

C359S811000

Reexamination Certificate

active

07580208

ABSTRACT:
A focus adjustment apparatus includes an imaging device for capturing object images via a photographing lens; a lens driving device which moves a focusing lens group; a manual focus adjustment device which actuates the lens driving device to move the focusing lens group in response to a manual operation; a focus detection device for making the imaging device capture an object image to determine a contrast value thereof each time the focusing lens group moves by a predetermined amount of movement due to the manual operation, and for detecting an in-focus position of the focusing lens group in accordance with contrast values detected by the focus detection device at different lens positions; and a controller which moves the focusing lens group to the in-focus position via the lens driving device if a deviation exists between a stopped position and the in-focus position.

REFERENCES:
patent: 2005/0219719 (2005-10-01), Kawai
patent: 2005/0280734 (2005-12-01), Nakahara
patent: 2005/0280735 (2005-12-01), Nakahara
patent: 2006/0077280 (2006-04-01), Nakahara
patent: 2006/0078323 (2006-04-01), Nakahara
patent: 11-298791 (1999-10-01), None
patent: 2000-89089 (2000-03-01), None
patent: 2001-154083 (2001-06-01), None
English language Abstract of JP 11-298791.
English language Abstract of JP 2000-89089.
English language Abstract of JP 2001-154083.
U.S. Appl. No. 11/609,518 to Nakahara, which was filed Dec. 12, 2006.

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