公开(公告)号：US20240230405A1

公开(公告)日：2024-07-11

申请号：US18618187

申请日：2024-03-27

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kei Tabata ,  Masaaki Muto

IPC: G01J3/28 ,  G01J3/02 ,  G01J3/26 ,  G02B5/28 ,  G01J3/12

CPC classification number: G01J3/28 ,  G01J3/0291 ,  G01J3/26 ,  G02B5/284 ,  G01J2003/1252

Abstract: A spectroscopic unit includes a housing, a light incident portion provided in the housing, a Fabry-Perot interference filter arranged in the housing and having a first mirror and a second mirror, a distance between the first mirror and the second mirror being variable. The light incident portion includes an aperture portion in which an aperture is formed and a band pass filter arranged between the aperture and the Fabry-Perot interference filter. The aperture portion is configured so that a value obtained by dividing a length of the aperture in a facing direction of the first mirror and the second mirror by a width of the aperture in a direction perpendicular to the facing direction is equal to or more than 0.5 and the entirety of light passing through the aperture is incident on the band pass filter.

公开(公告)号：US11971301B2

公开(公告)日：2024-04-30

申请号：US17287157

申请日：2019-08-06

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kei Tabata ,  Masaaki Muto

IPC: G01J3/26 ,  G01J3/02 ,  G01J3/28 ,  G02B5/28 ,  G01J3/12

CPC classification number: G01J3/28 ,  G01J3/0291 ,  G01J3/26 ,  G02B5/284 ,  G01J2003/1252

Abstract: A spectroscopic unit includes a housing, a light incident portion provided in the housing, a Fabry-Perot interference filter arranged in the housing and having a first mirror and a second mirror, a distance between the first mirror and the second mirror being variable. The light incident portion includes an aperture portion in which an aperture is formed and a band pass filter arranged between the aperture and the Fabry-Perot interference filter. The aperture portion is configured so that a value obtained by dividing a length of the aperture in a facing direction of the first mirror and the second mirror by a width of the aperture in a direction perpendicular to the facing direction is equal to or more than 0.5 and the entirety of light passing through the aperture is incident on the band pass filter.