Optical spectrometer

Details Optical spectrometer Optical spectrometer

2005-11-29

2005-11-29

Evans, F. L. (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

C356S327000

Reexamination Certificate

active

06970242

ABSTRACT:
Incoming light is spectrally analyzed by diffracting the incoming light with a grating. At least a part of the incoming light is split off so that this part contains mainly one polarization component of the incoming light. It is ensured that this split-off part and a remaining part of the incoming light reach the grating with their polarized component mainly parallel to a main direction of polarization which is diffracted with maximal efficiency by the grating. For this purpose, at least the split-off part is diffracted after being passed through a polarization rotating element.

REFERENCES:
patent: 5835210 (1998-11-01), Ershov
patent: 5886785 (1999-03-01), Lefevre
patent: 5946128 (1999-08-01), Paek
patent: 2001/0030745 (2001-10-01), He et al.
patent: WO 99/13543 (1999-03-01), None
patent: WO 2004-008089 (2004-01-01), None
PCT International Search Report, PCT/NL02/00468, dated Mar. 2, 2003.

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