公开(公告)号：US20240005702A1

公开(公告)日：2024-01-04

申请号：US18039337

申请日：2021-11-29

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： Arvid HAMMAR ,  Hans MARTINSSON ,  Su LIU

IPC: G06V40/40 ,  G06V40/13 ,  G06V10/143

CPC classification number: G06V40/40 ,  G06V40/1318 ,  G06V10/143

Abstract: A biometric imaging arrangement comprises an image sensor comprising a photodetector pixel array for capturing an image of an object. An infrared cut-off filter is arranged to at least partly cover the photodetector pixel array. The infrared cut-off filter comprises a first filter area having a first transmission wavelength band including wavelengths in the visible range of wavelengths, and at least two additional filter areas having transmission wavelength bands including wavelengths in the visible range of wavelengths. The transmission wavelength bands of the additional filter areas being different from the first transmission wavelength band, wherein at least two of the additional filter areas are spatially separated by the first filter area.

公开(公告)号：US20230020242A1

公开(公告)日：2023-01-19

申请号：US17784006

申请日：2020-12-15

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： Hans MARTINSSON ,  Petter ÖSTLUND ,  Jun LIU

IPC: G06V40/13 ,  G02B3/00

Abstract: A biometric imaging device characterized by comprising: an image sensor comprising a plurality of pixels forming a photodetector pixel array; a first aperture layer comprising openings in locations aligned with pixels of the pixel array; a first filter layer comprising a transparent material configured to block light within a predetermined first wavelength range; a transparent spacer layer arranged on the first filter layer, wherein the transparent spacer layer is configured to absorb light within a predetermined second wavelength range; and an array of microlenses arranged on the transparent spacer layer, wherein the microlenses are aligned with the openings in the aperture layer.