| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact and high-resolution spectrograph. SOLUTION: In the spectrograph 10, where light 1 that enters through an incidence slit 11, enters a photodetector 15 via a collimate mirror 12, a dispersion-type spectral element 13, and a camera mirror 14, the camera mirror 14 having a longer focal point distance than that of the collimate mirror 12 is used, and at the same time, plane mirrors 16 and 17 for folding are provided in the image forming light path of the camera mirror 14, so the light is made to travel via the plane mirrors 16 and 17, and incident on the photodetector 15.
|
