Abstract:
A spectrograph as disclosed includes a housing, wherein a wall of the housing includes first, second and third openings, an entrance slit located at the first opening and configured to direct light along a first light path portion in the interior of the housing, a dispersive element located at the second opening and configured to receive light from the entrance slit along the first light path portion and direct light along a second light path portion in the interior of the housing, a detector located at the third opening and configured to receive light from the dispersive element along the second light path portion. The detector can include first and second groups of light-sensitive regions. A cover can be positioned to separate the first group of light-sensitive regions from the light path, the second group of light-sensitive regions being exposed to the light path.
Abstract:
A spectroscopic unit and spectroscopic device according to the present invention are provided with a filter that is provided with a plurality of optical filter elements disposed in order from the entrance side to the exit side of light under measurement and has different transmission wavelengths corresponding to entrance positions along a first direction. A first optical filter element from among the plurality of optical filter elements is tilted with respect to a second optical filter element disposed adjacently to the first optical filter element as a result of the first optical filter element being rotated by a prescribed angle with a third direction that is perpendicular to both the first direction and s second direction from the entrance side to the exit side as the axis of rotation thereof or being rotated by a prescribed angle with the first direction as the axis of rotation thereof.
Abstract:
A spectroscopic device (10) comprising an optical fiber bundle (12) having its output end (12a) arranged in a vertical direction, a slit (16) provided so as to face the output end (12a) of the optical fiber bundle (12), a spectroscopic element arranging means (20) capable of arranging, on the optical path of light output from the output end (12a) of the bundle (12) and passed through the slit (16), a first diffraction grating (23) provided with a groove extending along a vertical direction at a specified line dispersion horizontally and a second diffraction grating (24) provided with a groove extending along a vertical direction at a line dispersion larger than that for the first diffraction grating (23) horizontally so as to enable switching between the diffraction gratings, and a photomultiplier (30) comprising a plurality of horizontally-arranged rows of anodes (53) extending along a vertical direction.