| CPC G01N 21/9505 (2013.01) [G01N 2201/065 (2013.01)] | 7 Claims |
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1. A measuring device comprising:
an integrating sphere with a subject to be measured disposed therein;
an excitation optical system configured to guide excitation light toward the subject to be measured disposed in the integrating sphere;
a light detector configured to detect light to be measured generated at the subject to be measured in the integrating sphere through irradiation with the excitation light; and
a first detection optical system configured to guide the light to be measured from the integrating sphere toward the light detector,
wherein an optical axis of the excitation light incident on the subject to be measured in the integrating sphere in the excitation optical system and an optical axis of the light to be measured that is emitted from the integrating sphere in the first detection optical system obliquely intersect with each other,
wherein the first detection optical system has a light detector input end, an end surface provided on the light detector input end, and an opening portion provided in a center of the end surface that limits a detection range of the light to be measured in the light detector, and
wherein an irradiation spot of the excitation light on the subject to be measured and the opening portion are in an optically conjugate relationship.
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