公开(公告)号：US11995911B2

公开(公告)日：2024-05-28

申请号：US18260508

申请日：2022-02-03

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Johan Hammersberg ,  Arvid Hammar

IPC: G06V40/13 ,  G02B5/20 ,  G02B27/28 ,  G06V10/14

CPC classification number: G06V40/1318 ,  G02B5/208 ,  G02B27/281 ,  G02B27/288 ,  G06V10/14

Abstract: An optical biometric imaging device includes an image sensor having a plurality of photodetector pixels; a lens assembly having at least one lens configured to focus light reflected by a biometric object onto the image sensor; at least one light source arranged adjacent to the lens assembly and which emits light towards a sensing surface of the biometric imaging device. The at least one light source comprises a waveguide which vertical decouples light; a first linear polarizer arranged between the light source and the image sensor; and a ring-shaped second linear polarizer arranged over the light source to polarize light emitted by the light source in a direction away from the image sensor and having an opening which allows light reflected by a biometric object to reach the lens without being filtered by the second linear polarizer. At least one of the polarizers are rotatable.

公开(公告)号：US20230177869A1

公开(公告)日：2023-06-08

申请号：US17920073

申请日：2021-04-27

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Matthew Liptrot ,  Arvid Hammar ,  Hans Martinsson

IPC: G06V40/13 ,  G06V40/12 ,  G02B27/30 ,  H01L27/146

CPC classification number: G06V40/1324 ,  G06V40/1394 ,  G02B27/30 ,  H01L27/14625 ,  G02B5/201

Abstract: An optical biometric imaging device comprising: an image sensor comprising a plurality of photodetector pixels; a plurality of collimating structures arranged above the image sensor, the collimating structures being configured to limit the incident angle of light reaching the image sensor to be lower than a first predetermined incident angle Θ1; wherein at least a subset of the collimating structures comprises a light-blocking element configured to block light having an incident angle lower than a second predetermined incident angle Θ2, the second incident angle being lower than the first incident angle, wherein the light-blocking element is configured to allow light having an incident angle between the first and second predetermined incident angles to pass and wherein the light-blocking element is configured to block light within a first predetermined wavelength range.

公开(公告)号：US11978278B2

公开(公告)日：2024-05-07

申请号：US18249263

申请日：2021-11-23

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Arvid Hammar ,  Hans Martinsson

IPC: G06V40/13 ,  G02B5/20 ,  G02B5/28 ,  G06F3/041 ,  G06V40/12

CPC classification number: G06V40/1318 ,  G02B5/204 ,  G02B5/28 ,  G06F3/0412 ,  G06V40/1324 ,  G06V40/1365

Abstract: A display arrangement comprising an optical biometric imaging device for imaging a biometric object comprising: an image sensor comprising a plurality of photodetector pixels; a lens arrangement comprising at least one lens configured to focus light reflected by a biometric object onto the image sensor; an aperture layer arranged between the object to be imaged and the image sensor, wherein the aperture layer comprises an aperture configured to limit the amount of light reaching the image sensor; and a filter element arranged in the aperture and configured to block light within a first wavelength range, wherein an area of the filter element is smaller than an area of the aperture so that a portion of light within the first wavelength range reaching the aperture layer pass through the aperture.

公开(公告)号：US20240021010A1

公开(公告)日：2024-01-18

申请号：US18260508

申请日：2022-02-03

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Johan Hammersberg ,  Arvid Hammar

IPC: G06V40/13 ,  G06V10/14 ,  G02B27/28 ,  G02B5/20

CPC classification number: G06V40/1318 ,  G06V10/14 ,  G02B27/281 ,  G02B5/208 ,  G02B27/288

Abstract: An optical biometric imaging device includes an image sensor having a plurality of photodetector pixels; a lens assembly having at least one lens configured to focus light reflected by a biometric object onto the image sensor; at least one light source arranged adjacent to the lens assembly and which emits light towards a sensing surface of the biometric imaging device. The at least one light source comprises a waveguide which vertical decouples light; a first linear polarizer arranged between the light source and the image sensor; and a ring-shaped second linear polarizer arranged over the light source to polarize light emitted by the light source in a direction away from the image sensor and having an opening which allows light reflected by a biometric object to reach the lens without being filtered by the second linear polarizer. At least one of the polarizers are rotatable.

公开(公告)号：US11941909B2

公开(公告)日：2024-03-26

申请号：US18249263

申请日：2021-11-23

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Arvid Hammar ,  Hans Martinsson

IPC: G06V40/13 ,  G02B5/20 ,  G02B5/28 ,  G06F3/041 ,  G06V40/12

CPC classification number: G06V40/1318 ,  G02B5/204 ,  G02B5/28 ,  G06F3/0412 ,  G06V40/1324 ,  G06V40/1365

Abstract: A display arrangement comprising an optical biometric imaging device for imaging a biometric object comprising: an image sensor comprising a plurality of photodetector pixels; a lens arrangement comprising at least one lens configured to focus light reflected by a biometric object onto the image sensor; an aperture layer arranged between the object to be imaged and the image sensor, wherein the aperture layer comprises an aperture configured to limit the amount of light reaching the image sensor; and a filter element arranged in the aperture and configured to block light within a first wavelength range, wherein an area of the filter element is smaller than an area of the aperture so that a portion of light within the first wavelength range reaching the aperture layer pass through the aperture.

公开(公告)号：US20230410550A1

公开(公告)日：2023-12-21

申请号：US18249263

申请日：2021-11-23

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Arvid Hammar ,  Hans Martinsson

IPC: G06V40/13 ,  G06V40/12 ,  G02B5/28 ,  G02B5/20 ,  G06F3/041

CPC classification number: G06V40/1318 ,  G06V40/1365 ,  G06V40/1324 ,  G02B5/28 ,  G02B5/204 ,  G06F3/0412

Abstract: A display arrangement comprising an optical biometric imaging device for imaging a biometric object comprising: an image sensor comprising a plurality of photodetector pixels; a lens arrangement comprising at least one lens configured to focus light reflected by a biometric object onto the image sensor; an aperture layer arranged between the object to be imaged and the image sensor, wherein the aperture layer comprises an aperture configured to limit the amount of light reaching the image sensor; and a filter element arranged in the aperture and configured to block light within a first wavelength range, wherein an area of the filter element is smaller than an area of the aperture so that a portion of light within the first wavelength range reaching the aperture layer pass through the aperture.