Spectrum measuring equipment utilizing double-image polarizing e

Details Spectrum measuring equipment utilizing double-image polarizing e Spectrum measuring equipment utilizing double-image polarizing e

1990-09-12

1992-01-14

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356328, 356334, G01J 318, G01J 332

Patent

active

050804863

ABSTRACT:
In spectrum measuring equipment the light to be measured is separated by a double-image polarizing element into two polarized wave components whose planes of polarization cross each other perpendicular and which have different optical axes. The two polarized wave components are applied to a dispersing element so that their planes of polarization intersect the direction of light separation at .+-.45.degree. thereto, respectively. The sum of optical powers of the two polarized wave components separated by the dispersing element is measured by a photodetector, so that spectrum measurement independent of the polarization of the light to be measured can be achieved.

REFERENCES:
patent: 3432238 (1969-03-01), Girard
patent: 3937577 (1976-02-01), Dorsch
patent: 4995724 (1991-02-01), Sonobe et al.

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