Photography – With exposure objective focusing means – focusing aid – or... – Processing circuit
Reexamination Certificate
2011-02-08
2011-02-08
Perkey, W. B. (Department: 2862)
Photography
With exposure objective focusing means, focusing aid, or...
Processing circuit
C396S432000, C318S079000, C250S201300
Reexamination Certificate
active
07885528
ABSTRACT:
A positioning system and method for focusing a charge coupled device (CCD) lens on a selected surface of an object to be measured is provided. The positioning system and method moves the CCD lens downwards to approximate an estimate Z-axis coordinate of the CCD lens, and moves the CCD lens upwards to find an accurate Z-axis coordinate of the CCD lens according to the selected surface of the object. The system and method further moves the CCD lens to a position corresponding to the accurate Z-axis coordinate to focus the CCD lens on the selected surface.
REFERENCES:
patent: 6449087 (2002-09-01), Ogino
patent: 7253385 (2007-08-01), Tanemura et al.
patent: 7345814 (2008-03-01), Yoneyama et al.
Chang Chih-Kuang
Chen Xian-Yi
Jiang Li
Xue Xiao-Guang
Yuan Zhong-Kui
Chew Raymond J.
Hancock Dennis
Hon Hai Precision Industry Co. Ltd.
Hong Fu Jin Precision Industry ( ShenZhen) Co., Ltd.
Perkey W. B.
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