G - Physics – 01 – J
Patent
G - Physics
01
J
73/54
G01J 3/00 (2006.01) G01J 3/18 (2006.01) G02B 5/30 (2006.01) G02B 27/28 (2006.01)
Patent
CA 2025204
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 perpendicular cross each other 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° thereto, respectively, and the sum of optical powers of the two polarized wave components separated by the dispersing element is measured by a photodetector, whereby spectrum measurement not dependent on the polarization of the light to be measured can be achieved.
Nakajima Hirochika
Shirasaki Masataka
Watanabe Yukimitsu
Yamamoto Rinichiro
Advantest Corporation
Fujitsu Limited
Kirby Eades Gale Baker
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