Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1994-08-15
1995-10-10
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356310, G01J 304, G01J 328
Patent
active
054575303
ABSTRACT:
A multi-slit type spectrometer includes a diffractor by which an incident light is diffracted according to wavelengths; an optical shutter array member including a plurality of optical shutter elements arranged in correspondence with wavelength bands diffracted by the diffractor, operable to transmit an incident ray according to an applied voltage, and made of PLZT. Each optical shutter element is applied with a voltage corresponding to the band of the ray incident upon the optical shutter element at a specified timing so that the ray passes through the optical shutter element. The spectrometer further includes a photosensor to convert the ray passed through the optical shutter element to an electrical signal, and a calculator to calculate the intensity of the incident ray for each band in accordance with the electrical signal output from the photosensor and the specified applying timing.
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Evans F. L.
Minolta Co. , Ltd.
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