| 摘要 |
PROBLEM TO BE SOLVED: To reduce an influence of deviation of light emission points of a light-emitting part for chromaticity measurement and a light-emitting part for turbidity measurement with a simplified configuration of an optical system, in a configuration where the light-emitting part for chromaticity measurement and the light-emitting part for turbidity measurement are juxtaposed relative to a light incidence window.SOLUTION: A colorimeter includes: a measurement cell 2 having a light incidence window part 2m and a light emission window part 2n; a light-emitting part 3 for chromaticity measurement which irradiates the inside of the measurement cell 2 with light for chromaticity measurement via the light incidence window part 2m; a light-emitting part 4 for turbidity measurement which irradiates the inside of the measurement cell 2 with light for turbidity measurement via the light incidence window part 2m; and a light detection part 5 which detects light transmitted through the measurement cell 2 via the light emission window part 2n. The light-emitting part 3 for chromaticity measurement and the light-emitting part 4 for turbidity measurement are juxtaposed so as to face the light incidence window part 2m, and a contour shape on the outside or the inside of the cell of a cross-section in an arrangement direction of two light-emitting parts, of the light incidence window part 2m or the light emission window part 2n is a convexly curved uniform cross-section. |
