Method and apparatus for monitoring an interferometer

Details Method and apparatus for monitoring an interferometer Method and apparatus for monitoring an interferometer

2002-10-11

2008-09-09

Lee, Hwa (Andrew) S (Department: 2886)

Optics: measuring and testing

By light interference

Spectroscopy

C356S484000

Reexamination Certificate

active

07423760

ABSTRACT:
An apparatus and to a method of monitoring an interferometer, comprising the steps of: coupling a first optical signal into the interferometer and into a wavelength reference element, detecting a first resulting interference signal being a result of interference of parts of the first optical signal in the interferometer, detecting a resulting reference signal of the wavelength reference element, the resulting reference signal being a result of interaction of the first optical signal with the wavelength reference element, and comparing the first resulting interference signal with the resulting reference signal to detect a drift of the interferometer, if any.

REFERENCES:
patent: 5764362 (1998-06-01), Hill et al.
patent: 6421120 (2002-07-01), Wildnauer
patent: 6570894 (2003-05-01), Anderson
patent: 1172637 (2002-01-01), None
patent: 2629197 (1988-03-01), None
patent: WO 98/38475 (1998-09-01), None

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