| 摘要 |
PROBLEM TO BE SOLVED: To provide an emission spectrum with sufficient accuracy of a luminous body that is an object under measurement without performing troublesome measurement on an external standard light source. SOLUTION: A WI light source originally incorporated in a spectrophotometer is used to measure the energy spectrum Einst (λ) of the light source (S1) while color temperature data on the light source are applied to the Planck's distribution expression to find a theoretical spectrum Ep(λ) (S2). From the energy spectrum Einst (λ) obtained by measurement and the theoretical spectrum Ep(λ), an approximate device function T(λ) is found and stored (S3). After measuring an apparent energy spectrum E1(λ) by introducing light emitted from the luminous body that is the object under measurement into a spectroscope via optical fiber or directly (S4), a correction is made by using the stored device function T(λ) to calculate a true emission spectrum Et(λ) (S5). COPYRIGHT: (C)2005,JPO&NCIPI
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