| 摘要 |
PURPOSE:To realize the shortening of a measuring time and the enhancement of measuring accuracy, by allowing selected lights different in a wavelength scanned by the shaking of a light selection means to transmit through a plurality of emitting slits to be always incident to a plurality of detection mechanisms. CONSTITUTION:Incident light 4 reaches a diffraction lattice 5 through an incident slit 1, a concave mirror 2 and a flat mirror 3 and lights different in a wavelength constituting the incident light 4 are diffracted at angles different corresponding to wavelengths and split into a plurality of selected lights 8 to reach a light blocking part 9 through a concave mirror 7. At this time, the arrival positions of the selected lights 8 to the light blocking part 9 are changed with the elapse of time by the shaking of the diffraction lattice 5 and the wavelength regions of the selected lights 8 transmitting through the emitting slits S1, S2, S3 of the light blocking part 9 are changed in respectively different ranges with the elapse of time and said lights 8 are incident to optical sensors PS1, PS2, PS3. Because the selected lights 8 of each wavelength region are always incident to the optical sensors PS1-PS3 during the scanning by the shaking of the diffraction lattice 5, incident quantity increases and measuring accuracy is enhanced. |
