Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1995-10-16
1997-08-12
Hantis, K.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356328, 356334, G01J 318, G01J 332
Patent
active
056571216
ABSTRACT:
A spectrum measuring device for measuring optical spectrum of input light includes first and second double-image elements which separate input light to be measured into two polarized wave components having respective planes of polarization perpendicularly intersecting each other and having different optical axes, a third double-image element which separates the two polarized wave components from the first and second double-image elements into four polarized wave components each two of which having respective planes of polarization perpendicularly intersecting each other and having different optical axes, a dispersing element which is irradiated by the four polarized wave components from the third double-image element in which the dispersing element separates optical components of each wavelength contained in the four polarized wave components at the same angle of separation, and a photodetector for measuring an overall intensity of the four polarized wave components of the same wavelength separated by the dispersing element.
REFERENCES:
patent: 2718170 (1955-09-01), Lyot
patent: 4995724 (1991-02-01), Sonobe et al.
patent: 5080486 (1992-01-01), Shirasaki et al.
Advantest Corporation
Hantis K.
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