| 摘要 |
PROBLEM TO BE SOLVED: To obtain an inexpensive portable spectrocolorimeter in which size, weight and power consumption can be reduced by providing means for driving selective switching of a plurality of light sources having different spectroscopic luminance distribution. SOLUTION: Output lights from a plurality of light sources, i.e., LEDs 101-112, having different spectroscopic luminance distribution and arranged to have a substantially aligned maximum intensity direction of light radiation intensity distribution are condensed temporarily by means of a convex lens 113. That light is returned back to a parallel light through a concave lens 114 before illuminating a matter 200 to be measured through a collimate lens 118. A switching drive means drives switching of the LEDs 101-112 selectively and light receiving elements 301-303 receives reflected light from the matter 200. Based on the output signals from the light receiving elements 301-303, reflectance in a wavelength range corresponding to the spectroscopic band of each LED 101-112 is determined. Consequently, a spectrocolorimeter satisfying international regulations as well as national regulations can be constituted.
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