OPTICAL SYSTEM FOR MEASUREMENT, LUMINANCE METER USING THE OPTICAL SYSTEM, COLOR LUMINANCE METER, AND COLOR METER

摘要

Measuring probe (40) according to the present invention, measurement light be incident on before simple optical fiber (13C, 14C, 15C) is received by by optical sensor (13B, 14B, 15B) by interference light filter (13A, 14A, (40) 0. Interferometric filter (13A, 14A, 15A) formation, obtains light transmission rate corresponding with measurement parameter, this depend on the intensity distribution of condition relative to incident light incidence angle at interferometric filter (13A, 14A, 15A). Therefore, measuring probe (40) influence according to the present invention, it is possible to reduce deviation transmission characteristics are due to incidence angle, even if using interference light filter (13A, 14A, 15A).