| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical system for measuring light of a wide dispersion light source and an instrument for measuring the light of the wide dispersion light source capable of measuring the whole light beam at the same time, reduced in labors and times for a measuring operation, simple in system/instrument constitution, capable of dispensing with a detector of high sensitivity, and capable of measuring the overall light beam accurately even when uneven brightness and an irregular color exist in the wide dispersion light source, and a light measuring method therefor. SOLUTION: In this optical system for the instrument 1 for measuring the light of the wide dispersion light source for measuring the light from the measured light source W by a measuring part of a light measuring means arranged in a side opposed to the measured light source, the optical system is an elliptical mirror 14 of a spheroid expressed by rotation around a major axis of an ellipse as the center, and is provided with openings 14e, 14f formed respectively in rear sides of the first focal point and the second focal point in the elliptical mirror, and is set to position the measured light source in the first focal point, and to position the measuring part 13a of the light measuring means in the second focal point. COPYRIGHT: (C)2005,JPO&NCIPI
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