Optical device with improved autofocus performance and...

Photography – With exposure objective focusing means – focusing aid – or... – Focus lock

Reexamination Certificate

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Details

C348S208120

Reexamination Certificate

active

07627240

ABSTRACT:
A device, method and a computer program product are shown for correcting the focus error in an optical device, wherein in a first position of the optical device at least one focus detector is focused onto a given image plane of the target subject and the distance (d1) between the optical device and the given image plane is locked and wherein in a second position of the optical device following a reorientation of the optical device for achieving the desired framing of the image the shutter is released, the method comprising sensing a distance vector parallel to the focus plane after reorientation between the first position and the second position after reorientation, calculating a focus correction value (de) from the sensed distance vector and adding the focus correction value (de) as a corrective to the locked focus distance (d1).

REFERENCES:
patent: 6710950 (2004-03-01), Rouvinen et al.
patent: 2004/0057613 (2004-03-01), Noto et al.
patent: 2005/0128335 (2005-06-01), Kolehmainen et al.
patent: 2007/0031136 (2007-02-01), Kakkori
patent: 8-75987 (1996-03-01), None
patent: 2002-72059 (2002-03-01), None
English Translation of the Detailed Description of JP 8-75987 A from Japanese Patent Office Website, Printed Jul. 7, 2008.
Patent Abstracts of Japan, Publication No. JP 08 075987, Publication Date: Mar. 22, 1996.
Patent Abstracts of Japan, Publication No. .JP 2002 072059, Publication Date: Mar. 12, 2002.

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