| 摘要 |
PURPOSE:To measure the spatial distribution of light emitting sources with high energy efficiency, by a method wherein the lights emitted from light sources distributed in a space are incident to two adjacent surfaces of a regular polygonal rotary mirror and the reflected lights therefrom are separately condensed by a condensing means and at least two spectroscopic means spectrally diffracting the condensed light are provided. CONSTITUTION:The luminous flux reflected from the A-surface 2a of a polygonal rotary mirror 2 is converged by A-surface condensing matter 13 and condensed to an incident slit 18 by utilizing reflecting mirrors 14, 15, 17 and a condensing matter 16. Subsequently, the incident luminous flux is projected on a dispersing element 20 by a collimation mirror 19 and further incident on an emitting slit 22 by a collimation mirror 21. As mentioned above, only light having a specific wavelength is detected by an A-surface reflected light detector 10. The luminous flux reflected from the B-surface 2b of the polygonal rotary mirror 2 is converged by condensing matter 23 to be condensed to an incident slit 27 by utilizing reflecting mirrors 24, 26 and condensing matter 25, and dispersed by a dispersing element 28 through the incident slit 27 to be detected by a B-surface reflected light detector 11. By this method, the lights from light sources 1 distributed in a space can be simultaneously measured by utilizing different spectroscopes.
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