Three dimensional sensor laser noise reduction method

Details Three dimensional sensor laser noise reduction method Three dimensional sensor laser noise reduction method

2005-08-16

2005-08-16

Dastouri, Mehrdad (Department: 2625)

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging to a point with two or more projected...

Reexamination Certificate

active

06930763

ABSTRACT:
A method for improving the accuracy of measurements made in non-contact gauging an object utilizing a detector to observe a laser line projected onto a surface of the object. A combination of detector lens f-number adjustments, surface scatter statistics, and laser coherence control are utilized to reduce speckle noise in the structured light gauge measurement system without the use of moving mechanical parts. This eliminates added mechanical motion errors and maximizes detectable laser light.

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Kevin Harding, “Speckle Reduction Methods for Laser Line Gages”, Proceedings, SPIE vol. 3204, editor K. Harding, pp. 137-144, (1997).

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