| 摘要 |
The present invention provides a small sized wide wave-range spectroscope with a simple structure which requires a short time to measure light for measurement over a wide wavelength spectrum. The small sized wide wave-range spectroscope has a collimator ( 43 ) for changing light for measurement (L) transmitted through a slit ( 41 ) into collimated light (L 0 ), a plurality of diffraction gratings ( 44 a, 44 b) with different grating constants d supported rotatably around a rotational axis in parallel with the incident slit ( 41 ) and disposed side by side in the direction of the rotational axis in the optical path of the collimated light (L 0 ), and a diffracted-light focusing members ( 45 a, 45 b) for focusing a plurality of diffracted light rays (L 1 to L 4 ) provided by the plurality of diffraction gratings ( 44 a, 44 b) by which the collimated light (L 0 ) is diffracted, each of the diffracted-light focusing members ( 45 a, 45 b) being provided in association with each of the plurality of diffraction gratings ( 44 a, 44 b).
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