| 摘要 |
Object: provide an accurate monitor of light of even intensity light. Construction: A beam splitter (4) being fixed on a base (1) in the path of a main beam (2) of a light system, a reflecting mirror (5) being fixed on a side of the beam splitter (4), an inlet 6a of an integrating sphere (6) is provided at an opposite side of the beam splitter (4), and a light sensor (8) is provided at a reflecting surface of the integrating sphere (6).
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