Interferometer apparatus for measuring the wavelengths of optica

Details Interferometer apparatus for measuring the wavelengths of optica Interferometer apparatus for measuring the wavelengths of optica

1980-02-04

1982-05-11

Corbin, John K.

Optics: measuring and testing

By particle light scattering

With photocell detection

G01B 902

Patent

active

043290558

ABSTRACT:
An interferometer system for measuring the wavelength of laser light or and other optical radiation comprises an interferometer with a radiation input for a reference beam of a given wavelength, a sample radiation input for a sample beam of unknown wavelength, and a beam splitter for splitting up an incoming beam into two part-beams, and a system for changing the optical lengths of two part-beam optical paths as used by the reference beam and, parallel to it, the beam whose wavelength is to be measured. There is furthermore a detector for converting output beams from the interferometer into representative electrical signals and a signal processing circuit coupled to the detector means.
Furthermore in the part-beam paths there is an optical part in the form of a parallelepipedic transparent body able to be rotated for the changing of the lengths of the paths of the beams in relation to each other, and a reflector system for reflecting back the part-beams, coming from the turning part, back into themselves.

REFERENCES:
Hall et al., "Laser Spectroscopy III, Proceedings of the Third Internatio Conference, Jackson Lake Lodge, Wyoming, 7/4-7/8 1977, pp. 410-426.
Hall et al., "Interferometric Roal-Time Display of CW Dye Laser Wavelength with Sub-Doppler Accuracy", Applied Physics Letters, vol. 29, pp. 367-369, 9/76.

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