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Patent Searching and Data


Title:
SPECTROSCOPIC UNIT AND SPECTROSCOPIC MODULE
Document Type and Number:
WIPO Patent Application WO/2021/065668
Kind Code:
A1
Abstract:
This spectroscopic unit comprises a housing having a wall part with an opening formed therein, a first aperture part that is provided on the reverse side of the wall part from a Fabry-Perot interference filter and has, formed therein, a first aperture that faces the opening in an opposition direction, and a second aperture part that is provided on the reverse side of the first aperture part from the wall part and has, formed therein, a second aperture that faces the first aperture in the opposition direction. The length of the second aperture in the opposition direction is longer than the length of the first aperture in the opposition direction. When viewed from the opposition direction, the outer edge of the first aperture is positioned inside the outer edge of the opening and the outer edge of the second aperture. The first aperture comprises at least one from among a fist tapered portion that extends to a first surface on the wall-part side of the first aperture part and widens toward the first surface and a second tapered portion that extends to a second surface on the second-aperture-part side of the first aperture part and widens toward the second surface.

Inventors:
TABATA KEI (JP)
KURAMOTO YUMI (JP)
Application Number:
PCT/JP2020/036020
Publication Date:
April 08, 2021
Filing Date:
September 24, 2020
Export Citation:
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Assignee:
HAMAMATSU PHOTONICS KK (JP)
International Classes:
G01J3/26; G01J1/04; G02B5/28; G02B26/00
Domestic Patent References:
WO2017057372A12017-04-06
WO1999039375A11999-08-05
WO2020090181A12020-05-07
Foreign References:
JP2010151639A2010-07-08
JP2016176910A2016-10-06
JP2014132304A2014-07-17
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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