Interferometer arrangement with adjustable optical path length d

Details Interferometer arrangement with adjustable optical path length d Interferometer arrangement with adjustable optical path length d

1996-02-09

1998-02-17

Font, Frank G.

Optics: measuring and testing

By particle light scattering

With photocell detection

250237G, 250358, G01B 902

Patent

active

057196737

ABSTRACT:
An interferometer arrangement has an adjustable optical path length difference in at least one interferometer arm and a photoelectric receiver for detecting the interference signals generated by the interferometer. An incremental grating transmitter is coupled to the arrangement with a device for changing the optical path length difference and for generating a reference signal which changes its frequency like that of the interference signal depending on the rate of change of the optical path difference.

REFERENCES:
patent: 5321501 (1994-06-01), Swanson et al.
patent: 5402230 (1995-03-01), Tian et al.
patent: 5486918 (1996-01-01), Nagashima
patent: 5523838 (1996-06-01), Nagashima
patent: 5576834 (1996-11-01), Hamada

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