Determining the wavelength of optical radiation

Details Determining the wavelength of optical radiation Determining the wavelength of optical radiation

1989-08-07

1991-06-11

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

356 44, 356345, 356350, G01J 300, G01B 902

Patent

active

050227548

ABSTRACT:
This invention relates to a method and apparatus, i.e. a "wavelength meter", for determininhg the wavelength of optical radiation, e.g., visible radiation. Radiation is subjected to two or more wavelength dependent phase modulations having a net effect which is wavelength dependent and is zero at a predetermined wavelength. The net modulation is then determined so as to obtain the difference between the predetermined wavelength and the actual wavelength of the radiation.

REFERENCES:
patent: 4671651 (1987-06-01), Toyoda et al.
patent: 4842358 (1989-06-01), Hall

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