公开(公告)号：US20220270646A1

公开(公告)日：2022-08-25

申请号：US17735444

申请日：2022-05-03

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yuichi MIYAMOTO ,  Masaomi Takasaka

IPC: G11B7/1381 ,  G02B5/22 ,  G02B5/28

Abstract: A radiation image reading device includes: a light scanning unit; a light detection unit. Each of a transmittance when the excitation light reflected from the surface of the recording medium is transmitted through the optical filter and a transmittance when the signal light emitted from the surface of the recording medium at an angle larger than a predetermined angle with respect to a direction perpendicular to the scan line within the detection surface is transmitted through the optical filter is smaller than a transmittance when the signal light emitted from the surface of the recording medium at an angle smaller than the predetermined angle with respect to a direction perpendicular to the scan line within the detection surface is transmitted through the optical filter.

公开(公告)号：US11355150B2

公开(公告)日：2022-06-07

申请号：US16341162

申请日：2017-10-04

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yuichi Miyamoto ,  Masaomi Takasaka

IPC: G11B7/1381 ,  G02B5/22 ,  G02B5/28

Abstract: A radiation image reading device includes: a light scanning unit; a light detection unit. Each of a transmittance when the excitation light reflected from the surface of the recording medium is transmitted through the optical filter and a transmittance when the signal light emitted from the surface of the recording medium at an angle larger than a predetermined angle with respect to a direction perpendicular to the scan line within the detection surface is transmitted through the optical filter is smaller than a transmittance when the signal light emitted from the surface of the recording medium at an angle smaller than the predetermined angle with respect to a direction perpendicular to the scan line within the detection surface is transmitted through the optical filter.

公开(公告)号：US10249784B2

公开(公告)日：2019-04-02

申请号：US15305371

申请日：2015-04-23

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Koei Yamamoto ,  Hiroshi Okamoto ,  Masaomi Takasaka ,  Yuki Okuwa ,  Shinya Iwashina

IPC: H01L31/16 ,  H01L31/0232 ,  H01L33/60 ,  G01C9/06

Abstract: An optical sensor includes: a light emitting element 40; a lower substrate 20 on which the light emitting element 40 is provided; an upper substrate 10 provided so that the light emitting element 40 is positioned between the upper substrate 10 and the lower substrate 20; and an optical block 30 provided on the upper substrate 10. The upper substrate 10 includes a division-type photodiode SD. The optical block 30 is configured to reflect light emitted from the light emitting element 40 toward a measurement target R, and light reflected by the measurement target R is incident onto the division-type photodiode SD.

公开(公告)号：US12068013B2

公开(公告)日：2024-08-20

申请号：US17735444

申请日：2022-05-03

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yuichi Miyamoto ,  Masaomi Takasaka

IPC: G11B7/1381 ,  G02B5/22 ,  G02B5/28

CPC classification number: G11B7/1381 ,  G02B5/226 ,  G02B5/286

Abstract: A radiation image reading device includes: a light scanning unit; a light detection unit. Each of a transmittance when the excitation light reflected from the surface of the recording medium is transmitted through the optical filter and a transmittance when the signal light emitted from the surface of the recording medium at an angle larger than a predetermined angle with respect to a direction perpendicular to the scan line within the detection surface is transmitted through the optical filter is smaller than a transmittance when the signal light emitted from the surface of the recording medium at an angle smaller than the predetermined angle with respect to a direction perpendicular to the scan line within the detection surface is transmitted through the optical filter.

公开(公告)号：US10234610B2

公开(公告)日：2019-03-19

申请号：US15327089

申请日：2015-07-10

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Takafumi Seko ,  Masaomi Takasaka ,  Hiroshi Okamoto

IPC: G02B5/04 ,  G02B5/28 ,  G02B26/02 ,  G02B1/11 ,  G02B26/00 ,  G02B1/115

Abstract: An optical element includes an optical block through which object light is transmitted along a light transmission axis direction, a first wavelength selection filter provided on a first filter surface set such that a normal line forms an angle α with the light transmission axis, and a second wavelength selection filter located on a rear side with respect to the first wavelength selection filter, and provided on a second filter surface set such that a normal line forms an angle α with the light transmission axis, the second filter surface being in non-parallel, having an opposite inclination direction, and forming an angle 2α with the first filter surface. The optical block is constituted by combining an incidence-side block, a first filter block, a second filter block, and an emission-side block, formed of the same material and in the same shape.