| 摘要 |
PROBLEM TO BE SOLVED: To provide a spectroscope which avoids malfunction due to polarization dependence of a spectroscopic element while suppressing increase in size and cost, and to provide a microspectroscopy system including the spectroscope.SOLUTION: A spectroscope 40 used in a microspectroscopy system 1 includes: a collimating lens 41 which collimates signal light into a substantially collimated light beam; a polarization separation element 42 which separates the substantially collimated light beam into light beams on two optical paths, i.e., a light beam having a P polarized component on a first optical path C1 and a light beam having an S polarized component on a second optical path C2; a polarization rotation element 43 which is placed on the first optical path C1 and rotates the light beam having the P polarized component to a light beam having the S polarized component; an optical path coupling member 44 which reduces a diameter of each of the substantially collimated light beams on the first optical path C1 and the second optical path C2 while maintaining the light beams to be collimated; a diffraction grating 45 serving as a spectroscopic element for dispersing the substantially collimated light beams emitted from the optical path coupling member 44; a light receiver 47 which detects spectral light beams dispersed by the diffraction grating 45; and a light convergence optical system 46 which converges the spectral light beams coming from the diffraction grating 45 on the light receiver 47. |
