NASA NTRS · 20080006044
Dual beam optical interferometer
Abstract
A dual beam interferometer device is disclosed that enables moving an optics module in a direction, which changes the path lengths of two beams of light. The two beams reflect off a surface of an object and generate different speckle patterns detected by an element, such as a camera. The camera detects a characteristic of the surface.
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Gutierrez, Roman C.. 2003-02-25. Dual beam optical interferometer. https://ntrs.nasa.gov/citations/20080006044
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