Wavelength compensator in a helium ambience

Details Wavelength compensator in a helium ambience Wavelength compensator in a helium ambience

1994-06-30

1996-01-09

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356361, 356349, G01B 902

Patent

active

054833434

ABSTRACT:
A wavelength compensator includes a reference vacuum tube having closed ends, wherein a laser beam enters the reference vacuum tube from one of the ends thereof and is reflected by the other end backwardly, an interference device for causing interference of the laser beam to produce an interference beam, and a light receiving device for receiving the interference beam which bears information related to a change in wavelength of the laser beam. The wavelength compensator further includes a specific arrangement which is effective to reduce vacuum deterioration of the reference vacuum tube.

REFERENCES:
patent: 4571082 (1986-02-01), Downs
patent: 4733967 (1988-03-01), Sommargren
patent: 4814625 (1989-03-01), Yabu
Norton, Francis J., "Permeation of Gases through Solids," Journal of Applied Physics, vol. 28, No. 1, Jan. 1957, pp. 34-39.

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