Spectroscope and microspectroscope equipped therewith

Details Spectroscope and microspectroscope equipped therewith Spectroscope and microspectroscope equipped therewith

2007-08-14

2007-08-14

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

C356S326000, C356S327000

Reexamination Certificate

active

11281536

ABSTRACT:
A spectroscope capable of suppressing the dimension and the cost with avoiding a problem caused by polarization dependency of the diffraction grating. The spectroscope includes a polarizing beam splitter plate3that divides the light from an input fiber1into a first and a second optical paths and polarizes each light of each optical path having different direction of polarization with each other, a Fresnel rhomb half wave plate5that arranges the direction of polarization of the light in the first optical path into that in the second optical path and a plane mirror4that deflects the second optical path such that at least a portion of an area where the light through the first optical path is incident on the diffraction grating6and an area where the light through the second optical path is incident on the diffraction grating overlap each other.

REFERENCES:
patent: 5886785 (1999-03-01), Lefevre et al.
patent: 6498872 (2002-12-01), Bouevitch et al.
patent: 6753960 (2004-06-01), Polynkin et al.
patent: 2002/0126385 (2002-09-01), Asami et al.
patent: 2002/0131691 (2002-09-01), Garrett et al.
patent: 2002/0181858 (2002-12-01), Bouevitch
patent: 2005/0157397 (2005-07-01), Efimov et al.
patent: 05127097 (1993-05-01), None

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