| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a gonio colorimeter which is capable of setting the angle of a light receiving direction with respect to an illuminant direction at will and moreover in a short time easily, is small in size, light in weight, and suitable to be made portable. <P>SOLUTION: The gonio colorimeter is provided with a toroidal mirror 2 which is made to be rotationally symmetric about a center axis 2x touching a face 1 of a sample, a spectrometric means having an entrance slit 41a on the center axis 2x, and a plane mirror 31 equipped with a rotating axis 30x coinciding with the center axis 2x. The toroidal mirror 2 reflects a component in each direction around the center axis parallel with a measuring plane 2a vertical to the center axis 2x, among rays of reflected light from the face 1 of the sample, and converges it at a position corresponding to each direction on the focal circumference 2f of the toroidal mirror 2. A luminous flux converged at the position corresponding to each position on the focal circumference 2f is selectively guided to the entrance slit 41a, according to an angle of rotation around the rotating axis 30x of the plane mirror 31 respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
