Patent ID: 6812452
Filing Date: 2004-11-02
Classification: G01J,H01S,H04B

Abstract:
Apparatus for measuring the wavelength of light present in a light beam, comprising:a light diverter able to receive the light beam as a first beam portion and provide there from a second beam portion having a transverse displacement characteristic, wherein said transverse displacement characteristic is representative of the wavelength of the light present in the light beam and the light beam makes only a single-pass with respect to said light diverter; a light detection unit able to receive said second beam portion, to detect said transverse displacement characteristic there in and to provide a raw signal based there on, wherein said raw signal includes at least one intensity value based on said transverse displacement characteristic; and a processor able to receive said raw signal including said at least one intensity value and determine the wavelength of light present in the light beam there from.