公开(公告)号：US20180224330A1

公开(公告)日：2018-08-09

申请号：US15749205

申请日：2016-08-04

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Takafumi YOKINO ,  Katsumi SHIBAYAMA ,  Katsuhiko KATO

IPC: G01J3/18 ,  G01J3/36 ,  G01J3/02 ,  G02B5/18

CPC classification number: G01J3/18 ,  G01J3/0205 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0256 ,  G01J3/0262 ,  G01J3/0264 ,  G01J3/0286 ,  G01J3/0291 ,  G01J3/36 ,  G02B5/1861

Abstract: A spectrometer includes a support having a bottom wall part in which a depression and a peripheral part are provided, and a side wall part, a light detection element supported by the side wall part while opposing the depression, and a dispersive part disposed on an inner surface of the depression. A length of the depression in a second direction in which a plurality of grating grooves included in the dispersive part is aligned is larger than a length of the depression in a third direction orthogonal to the second direction when viewed in a first direction in which the depression and the light detection element oppose each other. An area of the peripheral part adjacent to the depression in the second direction is larger than an area of the peripheral part adjacent to the depression in the third direction when viewed in the first direction.