Optics: measuring and testing – Position or displacement – Focus
Reexamination Certificate
2007-12-29
2010-10-26
Lauchman, L. G (Department: 2877)
Optics: measuring and testing
Position or displacement
Focus
C356S625000, C356S634000, C250S201200, C250S201500
Reexamination Certificate
active
07821652
ABSTRACT:
A method for focusing discrete points on an under-measured object is provided. The method includes: (a) receiving an image of the object, selecting measurement points on the image, and obtaining X, Y coordinate values of the measurement points; (b) searching a solid point on the under-measured object according to the X, Y coordinate value of one of the measurement points, wherein the solid point corresponds to the measuring point; (c) emitting a laser light to the solid point for computing a vertical distance “h” between the laser aid and the solid point; (d) computing a Z coordinate value of the measurement point according to the “h”; repeating step (b) to step (d) until all the Z coordinate values of the measurement points have been computed; and (e) focusing the solid points according to the X, Y and Z coordinate values of the measurement points. A related system is also provided.
REFERENCES:
patent: 4532420 (1985-07-01), Nakajima
patent: 6483091 (2002-11-01), Sadler et al.
patent: 2009/0015833 (2009-01-01), Heiden et al.
patent: 2009/0206234 (2009-08-01), Okuda et al.
Chang Chih-Kuang
Jiang Li
Hon Hai Precision Industry Co. Ltd.
Hong Fu Jin Precision Industry ( ShenZhen) Co., Ltd.
Lauchman L. G
Niranjan Frank R.
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