Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrophotometer
Patent
1989-08-14
1991-02-26
Evans, F. I.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrophotometer
356323, 356327, 356328, G01J 318, G01J 332
Patent
active
049957244
ABSTRACT:
A spectroscope device of the dispersion type receives light to be measured and emits it as dispersed light which corresponds to each of wavelengths to be measured. An optical-path switching device directs the dispersed light emitted from the spectroscope device to pass through first and second paths. A first photoelectric converter receives the light which is directed to pass through the first path by the optical-path switching device. A polarizing/separating device polarizes and separates the light, which is directed to pass through the second path by the optical-path switching device, into two polarized lights. Second and third photoelectric converters respectively receive the two polarized lights divided by the polarizing/separating device. An arithmetical process section corrects a first optical spectrum strength according to an output from the first photoelectric converter with at least a ratio of second and third optical spectrum strengths which correspond to outputs from the second and third photoelectric converter to calculate absolute spectrum values of the measured light at every wavelength of the light to be measured.
Sonobe Yoji
Tanimoto Takao
Anritsu Corporation
Evans F. I.
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