Patent ID: 7038775

Claim:
A spectroscopic system, comprising: an optical fiber bundle whose emitting end is arranged in a first direction; a slit which is arranged so as to oppose said emitting end of said optical fiber bundle; spectroscopic element arrangement means which can switchably arrange either a first diffraction grating in which grooves extending along a second direction are arranged at a predetermined groove density in a direction to intersect said second direction or a second diffraction grating in which grooves extending along said second direction are arranged at a groove density larger than that of said first diffraction grating in the direction to intersect said second direction, on an optical path of light which is emitted from said emitting end of said optical fiber bundle and passes through said slit; and a photomultiplier tube, in which a plurality of anodes extending along a third direction, are arranged in a direction to intersect said third direction; wherein said first direction, said second direction, and said third direction are substantially the same direction.