Abstract: A biometric imaging arrangement configured to acquire an image of an object comprising: an image sensor comprising a photodetector pixel array configured to detect light transmitted from the object for capturing an image, an optical filter assembly comprising at least an optical interference filter, the optical filter assembly being arranged to cover the photodetector pixel array, and the optical filter assembly having an infrared cut-off wavelength to at least partly block infrared light from reaching the photodetector pixel array, the optical filter assembly further having at least a first cut-off wavelength in the visible range of wavelengths, wherein the first cut-off wavelength depends on the angle of incidence of the received light on the optical filter assembly.

Abstract: A biometric imaging arrangement comprising: a photodetector pixel array including at least a first portion of pixels arranged to receive light transmitted from a spectral filter with a spectral transmission band and at least a second portion of pixels arranged to receive light not transmitted from the spectral filter, wherein the biometric imaging arrangement is configured to acquire an image of an object and perform user authentication at least partly based on, in the acquired image, a relationship between the intensity of light received by the first portion of pixels and the intensity of light received by the second portion of pixels.

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.

Abstract: The present invention relates to an optical biometric sensor (100) comprising: an image sensor (302) comprising an array (301) of photodetectors (304), wherein for acquiring sensing signals, the image sensor is controllable to sequentially start exposure of subsets (306, 308, 309) of photodetectors; and a timing circuitry (310) configured to control the start of exposure of a subset of photodetectors based on a present data transfer capacity on a data transfer bus (312) configured to transfer data indicative of the acquired sensing signals from the optical biometric sensor to a host device (314).

Abstract: The present invention relates to an optical biometric sensor comprising: a read-out circuitry controllable for converting analog sensing signals to digital signals, the analog sensing signals being indicative of an image acquired by an image sensor comprising an array of photodetectors; and a timing circuitry configured to control the read-out circuitry to provide digital signals based on a present data transfer capacity on a data transfer bus configured to transfer data indicative of the digital signals from the optical biometric sensor to a host device.

Abstract: The present invention relates to an optical biometric sensor comprising: a read-out circuitry controllable for converting analog sensing signals to digital signals, the analog sensing signals being indicative of an image acquired by an image sensor comprising an array of photodetectors; and a timing circuitry configured to control the read-out circuitry to provide digital signals based on a present data transfer capacity on a data transfer bus configured to transfer data indicative of the digital signals from the optical biometric sensor to a host device.

Abstract: The present invention relates to an optical biometric sensor comprising: an image sensor comprising an array of photodetectors, wherein for acquiring sensing signals, the image sensor is controllable to sequentially start exposure of subsets of photodetectors; and a timing circuitry configured to control the start of exposure of a subset of photodetectors based on a present data transfer capacity on a data transfer bus configured to transfer data indicative of the acquired sensing signals from the optical biometric sensor to a host device.

Abstract: A biometric imaging arrangement comprising: a photodetector pixel array including at least a first portion of pixels arranged to receive light transmitted from a spectral filter with a spectral transmission band and at least a second portion of pixels arranged to receive light not transmitted from the spectral filter, wherein the biometric imaging arrangement is configured to acquire an image of an object and perform user authentication at least partly based on, in the acquired image, a relationship between the intensity of light received by the first portion of pixels and the intensity of light received by the second portion of pixels.

Abstract: There is provided a test module for testing a fingerprint sensing device comprising: an electrically conductive bottom element comprising an exterior surface portion configured to contact a sensing surface of the fingerprint sensing device; an electrically conductive intermediate element, connected to the bottom element on a side opposing the exterior surface, the intermediate element comprising a flexible material enabling the bottom element to change alignment in response to an applied force occurring when the exterior surface is pressed against a surface being tilted with respect to the exterior surface of the bottom element; and a top element configured connect the test module to a test fixture. There is also provided a method for testing a fingerprint sensing device using the described test module.

Abstract: There is provided a test module for testing a fingerprint sensing device comprising: an electrically conductive bottom element comprising an exterior surface portion configured to contact a sensing surface of the fingerprint sensing device; an electrically conductive intermediate element, connected to the bottom element on a side opposing the exterior surface, the intermediate element comprising a flexible material enabling the bottom element to change alignment in response to an applied force occurring when the exterior surface is pressed against a surface being tilted with respect to the exterior surface of the bottom element; and a top element configured connect the test module to a test fixture. There is also provided a method for testing a fingerprint sensing device using the described test module.

Abstract: An imaging system includes an integrated projector that projects images on to an external display surface and a digital camera that records gestures and/or other objects that are in or illuminated by the projected images. The camera and/or the projector generate a timing signal to synchronize a refresh rate of the projector with an exposure time of the digital camera. The synchronization reduces or eliminates interference patterns that may be caused by gestures in or illuminated by the projected image, and allows the digital camera to more accurately detect the gestures.