A device for contactless acquisition of biometric data from the skin.

Abstract

The present disclosure relates to an apparatus 1000 for non-contact acquisition of biometric data from a skin area. For example, the sensor optical arrangement 120 of the image acquisition unit 100 or the emitter optical arrangement 220 of the illumination unit 200 is offset such that the focal planes 135, 235 of the image acquisition unit 100 and the illumination unit 200 basically completely overlap. As a result, for example, the areas of the optical sensor 115 of the image acquisition unit 100 or the light emitting elements 215 of the illumination unit 200 can be used to the maximum extent, and as a result, the quality of acquisition of biometric features of the hand, particularly the finger, is considerably improved. Further, for example, by beam bending using the reflective optical element 700, the compactness of the apparatus 1000 can be further increased.

Claims

[Claim 1] A device for non-contact acquisition of biometric authentication data from the skin area, - At least one image acquisition unit configured to acquire image data non-contact from an illuminated skin area, including an optical sensor and sensor optical arrangement positioned upstream of the beam path. - At least one illumination unit comprising a light-emitting element and emitter optical arrangement located downstream of the beam path and configured to illuminate the skin region to be acquired by the image acquisition unit. Equipped with, The sensor optical arrangement is positioned offset from the optical sensor along the optical principal plane of the sensor optical arrangement, and the optical axis of the sensor optical arrangement is perpendicular to the optically effective plane of the optical sensor and is positioned offset without tilting the sensor optical arrangement with respect to a line of symmetry located in the center of the optically effective plane, or the optical axis of the emitter optical arrangement is perpendicular to the optically effective plane of the light-emitting element and is positioned offset without tilting the emitter optical arrangement with respect to a line of symmetry located in the center of the optically effective plane, and the emitter optical arrangement is positioned offset from the light-emitting element along the optical principal plane of the emitter optical arrangement, so that the focal plane section of the image acquisition unit and the focal plane section of the illumination unit have the maximum possible overlap with each other. Device. [Claim 2] The offset of the sensor optical arrangement with respect to the optical sensor or the offset of the emitter optical arrangement with respect to the light-emitting element is selected such that the overlap of the focal plane sections of the image acquisition unit and the illumination unit with respect to the maximum possible overlap of the focal plane sections of the image acquisition unit and the illumination unit exceeds at least 80%, and particularly 95%. The apparatus according to claim 1. [Claim 3] The offset of the sensor optical arrangement relative to the optical sensor is an offset between <150% and >50%, particularly an offset between <110% and >90%, and the offset of the sensor optical arrangement relative to the optical sensor is defined as the ratio of the lateral displacement of the sensor optical arrangement to the tip length of the optical sensor along the optical principal surface of the sensor optical arrangement, or The offset of the emitter optical arrangement relative to the light-emitting element is between <60% and >40%, and the offset of the emitter optical arrangement relative to the light-emitting element is defined as the ratio of the lateral displacement of the emitter optical arrangement to the chip length of the light-emitting element along the optical principal surface of the emitter optical arrangement. The apparatus according to claim 1. [Claim 4] The sensor optical arrangement is positioned offset from the optical sensor along the main surface of the sensor optical arrangement, and the emitter optical arrangement is positioned offset from the light-emitting element along the main surface of the emitter optical arrangement. The apparatus according to claim 1. [Claim 5] The offset of the sensor optical arrangement relative to the optical sensor and the offset of the emitter optical arrangement relative to the light-emitting element each have an offset of >25%. The offset of the sensor optical arrangement relative to the optical sensor is defined as the ratio of the lateral displacement of the sensor optical arrangement to the chip length of the optical sensor along the optical principal surface of the sensor optical arrangement. The offset of the emitter optical arrangement with respect to the light-emitting element is defined as the ratio of the lateral displacement of the emitter optical arrangement to the chip length of the light-emitting element along the optical principal plane of the emitter optical arrangement. The apparatus according to claim 4. [Claim 6] The apparatus further comprises a system area on which the image acquisition unit and the illumination unit of the apparatus are provided, and an acquisition area for non-contact acquisition of image data of the skin area to be acquired, wherein the system area and the acquisition area are separated from each other by a common interface. The apparatus according to claim 1. [Claim 7] The focal plane sections of the image acquisition unit and / or the illumination unit are positioned in the acquisition area, and the beam paths of the image acquisition unit and / or the illumination unit are bent by a reflective optical element for non-contact acquisition of the skin area within the focal plane section, so that the working distance of the sensor optical arrangement and / or the emitter optical arrangement for each of the focal plane sections is greater than one of the external dimensions of the system area of ​​the device, including the depth, width, and height. The apparatus according to claim 6. [Claim 8] The reflective optical element includes a mirror and / or a prism. The apparatus according to claim 7. [Claim 9] The acquisition area having the focal plane sections of the image acquisition unit and the illumination unit is formed such that the skin area to be acquired is positioned within the depth of field of the focal plane sections of the image acquisition unit and the illumination unit. The apparatus according to claim 6. [Claim 10] The skin region to be acquired includes the area of ​​a human hand, particularly the palm and fingers, and the acquisition region is formed such that several fingers are acquired simultaneously by the image acquisition unit. The apparatus according to claim 9. [Claim 11] By the aforementioned image acquisition unit - Four fingers, especially the index finger, middle finger, ring finger and little finger, - Two thumbs - The entire palm, or - The entire inner side of the hand The acquisition area is formed so that the acquisitions are acquired simultaneously. The apparatus according to claim 10. [Claim 12] The illumination unit illuminates the skin area with structured light. The apparatus according to claim 1. [Claim 13] The apparatus is configured to generate 3D data of the skin region, particularly as a 3D point cloud, based on the image data of the skin region acquired by the at least one image acquisition unit, which is illuminated using structured light. The apparatus according to claim 12. [Claim 14] The light-emitting element emits light at a wavelength between 400 nm and 550 nm, particularly preferably between 450 nm and 500 nm. The apparatus according to claim 1. [Claim 15] The system area of ​​the aforementioned device has external dimensions of a maximum of 8 inches, preferably <180 mm, and particularly preferably <160 mm in depth, width, and height. The apparatus according to one of claims 6 to 11. [Claim 16] The apparatus, including the system area and the acquisition area, has external dimensions of a maximum depth, width, and height of 8 inches, preferably <180 mm, and particularly preferably <160 mm. The apparatus according to one of claims 6 to 11.

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