SUPPORT FRAME, SPECTROMETER, SPECTROSCOPIC ANALYSIS UNIT, AND IMAGE FORMATION DEVICE

摘要

To arrange optical elements close to each other with good alignment accuracy.SOLUTION: A support frame according to one aspect of the disclosed art is a support frame of a hollow structure having four or more openings. The support frame includes a concave diffraction grating disposed at a position of a first opening, a variable reflection part which is arranged at a position of a second opening and reflects light dispersed in the concave diffraction grating at a variable reflection angle, a third opening for allowing light to enter into the support frame, and a fourth opening for emitting light reflected by the variable reflection part to the outside of the support frame.SELECTED DRAWING: Figure 3