Method and apparatus for detecting wavelength of laser beam

Details Method and apparatus for detecting wavelength of laser beam Method and apparatus for detecting wavelength of laser beam

1993-09-01

1994-06-07

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356346, G01B 902

Patent

active

053194411

ABSTRACT:
A laser light, whose wavelength is to be measured, is introduced into an etalon, a concentric circular interference stripe derived from the etalon is irradiated onto a one-dimensional photodetector array and a diameter of the interference stripe is measured to measure the wavelength of the laser light. Alternatively, if a reference laser light of known wavelength is introduced into the etalon, as described above, a wavelength measurement of extremely high accuracy can be made without being affected by positional deviations of the optical system.

REFERENCES:
patent: 4172663 (1979-10-01), Byer et al.

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