| 摘要 |
PROBLEM TO BE SOLVED: To provide a luminous energy measuring system having a reflecting mirror, and having one light source and one photoreception element, constituted of one expensive sensor, constituted inexpensively without generating a measuring error caused by individual characteristic differences such as sensitivities. SOLUTION: This luminous energy measuring system is provided with the reflecting mirror 4 in Fig.1 capable of measuring reference luminous energy and measured luminous energy by the one light source, and a shutter 6 therefor. COPYRIGHT: (C)2007,JPO&INPIT
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