COLOR SENSOR

摘要

PROBLEM TO BE SOLVED: To provide a color sensor which hardly causes an error in the intensity of red light while securing the transmissivity of a red light filter using surface plasmon resonance.SOLUTION: A color sensor (10) includes: a red light filter (12R); a red light receiving element (14R); an infrared light filter (12IR); an infrared light receiving element (14IR); and a correction part (16A). Red light is transmitted through the red light filter. The red light receiving element receives the red light transmitted through the red light filter. Infrared light is transmitted through the infrared light filter. The infrared light receiving element receives the infrared light transmitted through the infrared light filter. The red light filter and the infrared light filter are respectively configured as a filter using surface plasmon resonance. The correction part corrects the output of the red light receiving element on the basis of the output of the infrared light receiving element by referring to the transmission characteristics of the red light filter and the infrared light filter.