Method and arrangement for detecting edges and bores of a workpi

Details Method and arrangement for detecting edges and bores of a workpi Method and arrangement for detecting edges and bores of a workpi

1992-03-23

1994-03-01

Rosenberger, Richard A.

Optics: measuring and testing

By polarized light examination

With light attenuation

356375, 356378, 356376, 250561, G01B 1100

Patent

active

052912701

ABSTRACT:
The invention is directed to a method and arrangement for detecting edges and bores on a workpiece with an optical probe head. The optical probe head is guided with constant beam power over the workpiece surface for detecting the edges and bores. In addition to the distance signal of the probe head, the intensity of the radiation backscattered from the workpiece is determined and stored. With the intensity values simultaneously stored with the coordinates of the workpiece surface in the region of the edges and bores, the coordinates of the edges and bores are determined from abrupt changes of the trace of the intensity.

REFERENCES:
patent: 4209252 (1980-06-01), Arditty et al.
patent: 4721388 (1988-01-01), Takagi et al.
patent: 4790660 (1988-12-01), Ito et al.
patent: 4822163 (1989-04-01), Schmidt
patent: 4838696 (1989-06-01), Pryor
patent: 4934810 (1990-06-01), Nagele et al.
"MV-300 Machine Vision" by Perceptron, The Machine Vision Company, 1985.

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