Method for image calibration and apparatus for image acquiring

Details Method for image calibration and apparatus for image acquiring Method for image calibration and apparatus for image acquiring

2011-08-23

2011-08-23

Stafira, Michael P (Department: 2886)

Image analysis

Applications

Manufacturing or product inspection

Reexamination Certificate

active

08005290

ABSTRACT:
The present invention relates to a method for image calibration and an apparatus for image acquiring. In the method for image calibration, the image formation position for an image acquiring unit of the apparatus is calibrated according to the relative location of the image acquiring unit to a objective lens of the apparatus, wherein the relative location is determined by calculating the focus index of the image acquired by the image acquiring unit so that a clear and sharp interferogram can be obtained for three dimensional surface profile measuring. In addition, it is possible to obtain a clear and sharp image without any interference fringe outside the coherent range by adjusting the image formation position, which is capable of being utilized for two dimensional defect detection and dimension measurement.

REFERENCES:
patent: 7068376 (2006-06-01), De Groot
patent: 7394943 (2008-07-01), Kinney et al.
patent: 2006/0158657 (2006-07-01), De Lega et al.
patent: 1991341 (2007-07-01), None
patent: I269861 (2007-01-01), None
patent: I274849 (2007-03-01), None
patent: 200716944 (2007-05-01), None
Taiwan Intellectual Property Office, “Office Action”, Dec. 2, 2010, Taiwan.
State Intellectual Property Office of the People's Republic of China, “Office Action”, Jul. 24, 2009, China.

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