| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact spectral colorimetric device.SOLUTION: A spectral colorimetric device includes: an arrayed light-receiving member which receives a light flux split and condensed by a concave diffraction grating 160 on a plurality of photoelectric conversion elements 170, and outputs a corresponding electric signal; and a box-shaped housing which supports the arrayed light-receiving member. A side wall of the housing includes: an opening where the split light flux passes; and an adjustment face formed on the outside and parallel to a tangent in a part in an area of the light flux received by the photoelectric conversion elements 170, in a Rowland circle of the concave diffraction grating 160. The adjustment face is brought into contact with the arrayed light-receiving member so that a distance between the arrayed light-receiving member and the center of the Rowland circle is fixed, in normal direction of the tangent of the Rowland circle, to position the arrayed light-receiving member. The arrayed light-receiving member is supported so that a direction in which the photoelectric conversion elements 170 of the arrayed light-receiving member is parallel to the tangent of the Rowland circle and that the photoelectric conversion elements 170 receive the light flux passing through the opening. |
