Interferometric measurement device with non stabilized light sou

Details Interferometric measurement device with non stabilized light sou Interferometric measurement device with non stabilized light sou

1991-05-14

1993-02-23

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356360, G01B 1102

Patent

active

051894890

ABSTRACT:
The present invention relates to a method for greatly extending the effective coherence length of non-stabilized lasers allowing one to use them in interferometers with large optical path differences. The embodiment described as an example comprises a robust Twyman-Green interferometer for accurate measurement of extended displacements.

REFERENCES:
patent: 4973153 (1990-11-01), Yokokura et al.

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