Method and system for determining surface profile information

Details Method and system for determining surface profile information Method and system for determining surface profile information

1988-02-01

1989-07-25

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

250205, G01B 1124

Patent

active

048507121

ABSTRACT:
A system determines the surface profile of an object. Systems of this kind are used in industrial robots, such as automatic welders. The severe operating environment requires a vision system with noise immunity along with accuracy. A beam splitter enables the use of discrete optical detectors which eliminate many problems inherent with previously used detectors, such as diode arrays and TV cameras. Additionally, an automatic gain control alters the intensity of a generated optical beam in response to the reflectivity of the surface. These features increase the accuracy and noise immunity of an optical vision system for use in sever industrial applications.

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Welding sensor uses structured light and 2D photocell, Sensor Review, vol. 2, No. 1, Jan., 1982, pp. 26-29.
PCT International Search Report (PCT/US 88/00902), Fiber Optic Seam Tracking Apparatus published Apr. 24, 1986.

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