| 摘要 |
PROBLEM TO BE SOLVED: To obtain a good S/N ratio by controlling an aperture ratio of an integrating sphere while increasing the number of photodetectors to be used. SOLUTION: A table 20, on which a plurality of photodetectors 22, 24, 26 having different wavelength characteristics are mounted, is movably disposed outside of an output window 16 disposed on the integrating sphere 10. According to the wavelength of an object to be measured, the table 20 is moved so that the photodetecting face of the photodetector 22, 24 or 26, which corresponds to the wavelength, comes to the location where the outgoing light from the output window 16 hits. COPYRIGHT: (C)2009,JPO&INPIT
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