| 摘要 |
PURPOSE:To provide a light detector capable of precisely detecting the optical intensities of lights having a plurality of wavelengths with a simple structure. CONSTITUTION:A plurality of photo-electric converting elements 21 are arranged in one mour case 13, and optical filters 24 are arranged corresponding to these photo-electric converting elements 21. The light transmitted by the window member 22 of the light incident window 12a of the armour case 13 and diffused is spectrally diffracted by each optical filter 24, and made incident on the photo- electric converting element 21 in the rear thereof. Each photo-electric converting element 21 outputs an electric signal corresponding to the intensity of the incident light. Thus, lights having a plurality of wavelengths can be simultaneously measured.
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