Device for biometric verification and / or identification

Abstract

The invention relates to a contactless, multimodal biometric device (1) for the biometric verification and / or biometric identification of a person, comprehensive: - one processing unit (20), - a first camera unit (4) arranged to scan a space outside the biometric device (1) or in an open cavity of the biometric device (1) and comprising a first lens (4b) and a first camera sensor (4a) connected to a processing unit (20), and - a first proximity sensor (6) for measuring the distance of an object located in the space detected by the first camera unit (4) from the first proximity sensor (6), which is connected to the processing unit (20) for transmitting the measured distance values, - wherein the first lens (4b) is designed as a liquid lens and is connected to the processing unit (20) to receive signals for its focusing based on the distance values ​​measured by the first proximity sensor (6).

Description

[0001] The invention relates to a device for biometric verification and / or identification using fingerprint features and / or facial features. The device comprises a camera with one or more liquid lenses or solid-state lenses, one or more illumination units, one or more proximity sensors, a display unit, a main circuit board for evaluation, optionally a 3D camera, and optionally a contactless reader for biometric identity documents. A biometric identity document is understood to be, for example, a biometric passport or a biometric identity card. This device is intended for access control, border control, and the identification and / or verification of a person, for example, in a mobile version for police officers. State of the art

[0002] Biometric identification and / or verification using fingerprints and / or facial features is a fundamentally well-known method that is based on the very low probability that two people have the same fingerprints and / or facial features.

[0003] The acquisition of biometric fingerprint samples is possible either by (i) contact (i.e., the individual places a finger or the entire hand on a specific scanning surface of a scanning device, which captures an image of the finger and / or hand) or (ii) contactless (i.e., the capture device captures an image of the finger and / or hand from a distance, i.e., without the individual having to touch any part of the detection device). The disadvantage of contact-based methods and devices is the risk of incorrect identification (or verification) due to contamination of the capture device's contact surface. In addition, the skin on the fingertip can change elasticity, which is closely related to the pressure exerted on the finger. The second major disadvantage is the possibility of bacteria and viruses being transmitted from the device's surface to other users. This makes it an unhygienic solution.Therefore, contactless methods and devices for biometric identification and / or verification based on fingerprints have recently been developed. Devices for facial identification and / or verification are, of course, contactless due to the nature of the scanning process.

[0004] In any case, the captured fingerprint(s) and facial images are then processed to compare them with the biometric patterns of registered persons stored in the database or with the pattern stored in the biometric identity document.

[0005] In the case of contactless biometric identification and / or verification based on fingerprints, a number of solutions are known which essentially deal with obtaining a focused image of the finger and / or hand of sufficiently high quality and with excellent contrast for subsequent processing and comparison, while the finger and / or hand moves at a certain speed through the detection space of the recording device.

[0006] The object of the present invention is to provide a novel device for the biometric verification and / or biometric identification of a person and a novel method for its operation.

[0007] The object is achieved according to the invention by a device for the biometric verification and / or biometric identification of a person having the features of claim 1 and by a method having the features of claim 11.

[0008] Advantageous further training is the subject of the subclaims.

[0009] A contactless, multimodal biometric device for the biometric verification and / or biometric identification of a person is proposed, comprehensive: - a processing unit, - a first camera unit arranged to scan a space outside the biometric device or in an open cavity of the biometric device and comprising a first lens and a first camera sensor connected to a processing unit, and - a first proximity sensor for measuring a distance of an object located in the space captured by the first camera unit from the first proximity sensor, which is connected to the processing unit for transmitting the measured distance values, - wherein the first lens is connected to the processing unit to receive signals for focusing based on the distance values ​​measured by the first proximity sensor. Likewise, the lens can be controlled based on a quickly calculated sharpness of the captured image.

[0010] In one embodiment, the contactless, multimodal biometric device further comprises a first illumination unit, in particular in the form of an array of lights, which are arranged in particular at a uniform angular distance around the first lens.

[0011] In one embodiment, the contactless multimodal biometric device further comprises a second camera unit having a second camera sensor and a second lens connected to the processing unit.

[0012] In one embodiment, the first lens and / or the second lens is / are a liquid lens or a lens with a motorized focusing mechanism.

[0013] In one embodiment, the second camera unit is arranged to capture an area outside the biometric device, - wherein the biometric device comprises a second proximity sensor arranged to measure a distance of an object located in the space captured by the second camera unit from the second proximity sensor, and connected to the processing unit for transmitting the measured distance values, - wherein the second lens is connected to the processing unit to receive signals for focusing based on the distance values ​​measured by the second proximity sensor. Likewise, the lens can be controlled based on a quickly calculated sharpness of the captured image.

[0014] In one embodiment, the contactless, multimodal biometric device comprises a front side (e.g., on a housing) on ​​which the second camera unit is arranged and the first camera unit is arranged below it.

[0015] In one embodiment, the contactless, multimodal biometric device comprises a front face (e.g., on a housing) on ​​which the second camera unit is arranged and, below the front face, an entrance to the open cavity in which a mirror is arranged to reflect the space scanned by the first camera unit in the open cavity.

[0016] In one embodiment, the contactless, multimodal biometric device further comprises a reader connected to the processing unit for reading biometric identity documents, in particular chips arranged therein. The reader may have an antenna for this purpose.

[0017] In one embodiment, the contactless multimodal biometric device further comprises a display unit for displaying the identification results and / or verification results, connected to the processing unit.

[0018] In one embodiment, the contactless, multimodal biometric device further comprises a 3D camera arranged to capture the area outside the biometric device and connected to the processing unit.

[0019] According to one aspect of the present invention, a method for operating the multimodal biometric device described above is proposed, wherein a plurality of images of an inner palm of a hand with a plurality of focal planes, in which the inner palm and / or fingertips of the fingers of the hand are located, are captured by the first camera unit and transmitted to the processing unit, by which a biometric identification is carried out. Biometric verification can be referred to as a comparison in which an assumed or alleged identity of a person is to be verified. This involves comparing currently read biometric data with a stored biometric pattern (if available) of the specific person. Biometric identification means determining the identity of the person.This may require reviewing all biometric samples stored in a database to declare the biometric sample with the best comparison score as the found identity. If the comparison score does not exceed a predefined minimum threshold, then the identity has not been found. In the case of biometric ID documents, this is always a verification.

[0020] In one embodiment, a plurality of sets, for example three sets, of images of the palm of the hand are recorded with a plurality of focal planes in which the palm of the hand and / or fingertips lie, wherein a first set is recorded when the palm of the hand is presented in a first position at a right angle to an optical axis of the first camera unit, wherein a second set is recorded when the hand has been rotated to the left about a proximal-distal axis from this position, wherein a third set is recorded when the hand has been rotated to the right about the proximal-distal axis from the first position. The proximal-distal axis can, for example, be an axis that runs through an extended middle finger of the user.

[0021] This allows the left, front, and right views of each finger to be fused (stitched) to create a kind of rolled print that covers a significantly larger area than a single front view. This generates an equivalent to a rolled fingerprint and / or palm image for civil and / or criminalistic purposes and / or increases the likelihood of user recognition if the hand is not fully presented to the device.

[0022] The user can be prompted to move his hand into different positions by outputs on the display unit.

[0023] In one embodiment, a machine-readable area of ​​a page of a biometric identity document is captured by means of the first or second camera unit, wherein characters present in the machine-readable area are recognized by the processing unit and a key contained therein is extracted, wherein data is read from a chip present in the biometric identity document by means of the reading device using the key.

[0024] In one embodiment, at least one image of a user's face is captured by the second camera unit, triggered by the proximity sensor, using the lighting unit and transmitted to the processing unit by which the biometric identification is carried out.

[0025] In one embodiment, at least one image of a right iris and / or a left iris of a user is captured by the second camera unit, triggered by the proximity sensor, using the illumination unit and transmitted to the processing unit by which the biometric identification is carried out.

[0026] In one embodiment, fingerprints and / or a palm print are / are determined from the captured images of the palm of the hand, wherein the determined fingerprints and / or the determined palm print are / are compared with a biometric pattern from the data read from the chip.

[0027] This process is called biometric verification of the user's claimed identity and is based on fingerprints and / or palm prints, using the biometric identity document as a reference.

[0028] In one embodiment, the captured image of the face and / or the image of the right iris and / or the left iris is / are compared with a biometric pattern from the data read from the chip.

[0029] This process is called biometric verification of the user's claimed identity and is based on images of the face and / or the right iris and / or a left iris, using the biometric identity document as a reference.

[0030] The combination options of biometric modalities can be provided in a single device. Groups of all biometric modalities—i.e., at least one fingerprint, a palm print, a facial image, and / or at least one iris image—can be combined in any order, comprising two, three, or four of the modalities.

[0031] In one embodiment, the 3D camera is used to check a position and an orientation of the user's hand and / or head and to provide feedback to the user requesting that the position and / or orientation be corrected.

[0032] Data acquired by the 3D camera can also be used for biometric recognition of the three-dimensional structure of the head and / or the three-dimensional geometry of the hand.

[0033] The device described in the present application requires little space, can be mounted, for example, on a wall, is contactless and allows the recording of at least one significant biometric feature (for example, two significant biometric features) and supports the use of biometric identity documents.

[0034] The device is modular and allows the capture and recognition of fingerprints or faces, or at least combines these two biometric features in a single biometric recognition process. This basic configuration can be expanded through the optional use of biometric identity documents and / or the optional use of a 3D camera. The 3D camera can be used to ensure the precise position and orientation of the captured biometric features and can also enable the capture and recognition of a 3D facial geometry and / or a 3D hand geometry, including subsequent biometric recognition.

[0035] If only fingerprints are used, the approaching hand is detected by a proximity sensor. The proximity sensor triggers the start of the hand capture with different focal planes to ensure the sharpness of the images of individual fingers, which may be oriented differently in space (it is difficult to position all fingertips in the same plane). These fingerprints are then processed, and identification or verification is performed. The illumination unit can be adjusted according to the shape (circular or rectangular), location, the wavelength(s) used, particularly infrared or green, and the required illuminance to ensure a high-quality image of the upper part of the hand (i.e., the fingers or fingertips).

[0036] When capturing a face, the situation is very similar—instead of the fingers, the face is captured, and then the identification or verification is performed. The illumination unit can be adjusted with regard to the shape (circular or rectangular) and / or location of the area to be illuminated, the wavelength(s) used, and the required illuminance. The settings should be selected to avoid eye damage or user discomfort.

[0037] The combination of fingerprints and facial recognition is an interesting advantage enabled by the use of a multimodal biometric device. The lighting unit should be adjusted according to the intended use and with user safety in mind.

[0038] In the present solution, PAD (Presentation Attack Detection) can be implemented using multispectral detection (using selected wavelengths) and / or blood vessel detection in the infrared light spectrum. These methods are described in the scientific literature. For example, a neural network can be trained to recognize various patterns in the image that may indicate a forgery (e.g., bubbles in the material, curvature of the fingerprint lines, sharp edges of the forgery, and the like).

[0039] Another option is verification using biometric data stored in the biometric pattern of a biometric identity document. For example, the front of the biometric identity document is scanned by a camera to detect the MRZ (Machine Readable Zone) using optical character recognition (OCR). The MRZ contains the key to access publicly available data contained in a chip of the identity document (e.g., the user's personal data and / or a facial image). Access to protected data contained in the chip requires a special certificate, which can be provided by authorized authorities. A radio unit (RFID / NFC) then reads the data from the chip of the biometric document (identity document) when it is moved toward the device.Reading the data from the identity document can take ten seconds or more, during which time the document can be placed against the device to securely read the data. The newly captured biometric data is then compared with the data from the biometric pattern stored in the biometric identity document.

[0040] All variants of the device (see Fig. 1) can be equipped with a 3D camera, which enables the precise determination of the position of the hand and / or face in front of the device. This allows the user to correct the position of their hand and / or face. Furthermore, it can enable the recognition of 3D data of the face and / or hand, i.e., additional information for multimodal biometric recognition. Likewise, the 3D camera can serve as an additional module for the PAD (protection against presentation attack tools, which can be particularly two-dimensional or three-dimensional with low quality). Fig. The variant shown in 1C can be configured for left-handed or right-handed people.

[0041] In all variants (see Fig. 1) the reading and interpretation of QR codes (Quick Response) can be supported.

[0042] A display unit of the device can be designed to be touch-sensitive (touch display) and / or an arrangement of position sensors (for example proximity sensors) can be arranged around the display unit, whereby a touch-free control of the device is possible without a touch-sensitive display unit, for example with a working distance of approximately 5 cm from the device.

[0043] Embodiments of the invention are explained in more detail below with reference to drawings.

[0044] Showing: Fig. 1A to 1D are schematic illustrations of different embodiments of a device for biometric verification and / or identification, Fig. 2 a schematic view of the device for biometric verification and / or identification without a mirror, Fig. 3 a schematic view of the device for biometric verification and / or identification with a mirror, and Fig. 4 a schematic view of an exemplary design of the device for biometric verification and / or identification.

[0045] Corresponding parts are provided with the same reference numerals in all figures.

[0046] The Fig. 1A to 1D show schematic illustrations of different embodiments of a device 1 for biometric verification and / or identification, in particular respective views of a front side.

[0047] One in Fig. The variant of device 1 shown in Figure 1A supports the recording of fingerprints, faces and identity documents using a camera located on the front.

[0048] One in Fig. The variant shown in Figure 1B is essentially the same as that shown in Fig. 1A, but has an additional camera on the front for capturing faces and identity documents.

[0049] One in Fig. The variant shown in Figure 1C is essentially the same as that shown in Fig. 1B, wherein the camera and the illumination units 9 for recording the fingerprints (optionally also the camera unit 3 and the proximity sensor 10) are arranged on a right side in a beveled edge of the device 1. In an alternative embodiment, the camera and the illumination units 9 for recording the fingerprints (optionally also the camera unit 3 and the proximity sensor 10) can also be arranged on a left side in a beveled edge of the device 1.

[0050] One in Fig. The variant shown in Figure 1D is similar to the one in Fig. 1C, but the camera and the lighting units 9 for recording the fingerprints (if applicable also the camera unit 3 and the proximity sensor 10) are arranged on an underside of the device 1 and are directed downwards, for example in the direction of a floor or substrate.

[0051] Fig. Figure 2 is a schematic view of the device 1 for biometric verification and / or identification without a mirror 12 with a plurality of possible components or with all possible components, some of which may be optional.

[0052] The invention is described below using embodiments of a device 1 for biometric verification and / or identification using fingerprints and / or a face and using a method for operating the device 1.

[0053] Fig. 4 is a schematic view of an exemplary design of the device 1 for biometric verification and / or identification.

[0054] Example 1 is based on the Fig. 1A. The device 1 comprises a display unit 2, a camera unit 4 (for example, a camera 4a with lens 4b), a lighting unit 5, and a proximity sensor 6. This configuration is suitable for recording fingerprints and subsequent identification. A user's hand approaches the device 1, the proximity sensor 6 detects the hand, and transmits a distance from the hand to the proximity sensor 6 to a Fig. 2 and Fig. 3 shown processing unit 20.

[0055] The camera unit 4 comprises a camera 4a and a lens 4b, for example a liquid lens or a motorized lens (see Fig. 2 and Fig. 3). The lens 4b is set to the distance provided by the proximity sensor 6 and the lens 4b of the camera unit 4 is automatically focused on the hand and the fingers are recorded by the camera 4a (see Fig. 2 and Fig. 3). This captured image is transmitted to processing unit 20, where finger regions of interest are extracted and fingerprints are compared with all stored patterns in a database of registered users or with a provided biometric pattern from a biometric document. The result of the comparison is displayed on display unit 2. For example, the identity is displayed if the comparison was positive; otherwise, information about unsuccessful identification is displayed.

[0056] Device 1 can also send this result to an API (Application Programming Interface), for example to open a gate.

[0057] Example 2 is based on Example 1, but additionally uses facial recognition. The face with an open hand on the right or left side of the head with the palm facing toward the device 1 is approached by the proximity sensor 6 in the device 1, which starts the recording similarly to the description in Example 1. However, instead of just the hand, two biometric images are taken – fingerprints (from the fingertips of the open hand) and a face image. The recognition of these two biometric images takes place in the processing unit 20 (see Fig. 2 and Fig. 3), where a decision fusion is also performed. In decision fusion, both results from the comparisons (face and fingerprint) are combined. In reality, the fingerprint has higher reliability and is therefore often more important for the decision. The rest of the process (displaying the result and / or communicating with an API) is similar to Example 1.

[0058] Example 3 is based on Example 1, but additionally includes a reader 7 for personal identity cards. Operation is the same as described in Example 1, but with an additional option: the user can use their BID (biometric identity document) and present it to the camera unit 4. The proximity sensor 6 detects the object approaching the device 1 and sends the distance information to the processing unit 20, which controls the lens 4b (in particular, a liquid lens). The camera 4a captures the front side of a biometric identity document. The processing unit 20 then recognizes the characters in a machine-readable zone (MRZ) of the biometric identity document.The user can then be prompted (for example, via an output on the display unit 2) to bring the biometric identity document closer to a corner of the device 1, behind which the reader 7, marked with a symbol of a biometric identity document, is located, so that the radio-based reader 7 can receive information from a chip of the biometric identity document using a key determined from the characters of the machine-readable zone and subsequently transmit it to the processing unit 20. The user can then be prompted to present their hand for fingerprint capture (similar to the description, for example, 1). This involves a comparison of the captured biometric data and the sample data of biometric characteristics read from the chip of the biometric identity document.If a match is found, the identity of the biometric identity document holder is confirmed. The rest of the process (displaying the result and / or communicating with an API) is similar to Example 1.

[0059] Example 4 is a combination of examples 2 and 3.

[0060] Example 5 is based on Example 2. The only difference from Example 2 is that an additional camera unit 3 is provided, which is used separately for facial recognition, while camera unit 4 is used for fingerprint recognition. Two differently designed lenses 4b, 3b and / or two differently designed cameras 4a, 3a (for example, with regard to resolution and / or refresh rate) can be used, for example, with differently designed illumination units 5, 9. For example, fingerprints are captured closer to device 1, while the face is captured from a greater distance.

[0061] Example 6 is based on Example 4. The only difference from Example 4 is that an additional camera unit 4 is provided, which is used separately for facial recognition, while camera unit 3 is used for capturing fingerprints and recording the biometric identity document. Two differently designed lenses 4b, 3b and / or two differently designed cameras 4a, 3a (for example, with regard to resolution and / or frame rate) can be used, for example, with differently designed illumination units 5, 9. For example, fingerprints and the biometric identity document are captured closer to device 1, while the face is captured from a greater distance.

[0062] Example 7 is based on Example 5. The only difference from Example 5 is that the camera unit 3 with the lighting unit 9 and a proximity sensor 10 is oriented laterally (left or right), particularly in relation to the orientation of the camera unit 4. The reason for this configuration may be a possible use of visible light (for lighting and / or for PAD - Presentation Attack Detection), which could dazzle the user if used frontally. Invisible light could also be used here. The lateral orientation of the camera unit 3 with the lighting unit 9 and the proximity sensor 10 at an angle ensures that the light does not fall directly onto the user's eyes. The side-facing camera unit 3 with the lighting unit 9 and the proximity sensor 10 can, for example, only be used for capturing fingerprints and / or the biometric identity document.The front-facing camera unit 4 with the lighting unit 5 and the proximity sensor 6 can, for example, only be used for capturing the face and / or the biometric identity document.

[0063] Example 8 is based on Example 6. The only difference from Example 6 is that the camera unit 3 with the lighting unit 9 and the proximity sensor 10 is oriented laterally (left or right), particularly relative to the orientation of the camera unit 4. The reason for this configuration may be the possible use of visible light (for lighting and / or for PAD - Presentation Attack Detection), which could dazzle the user if used frontally. The lateral orientation of the camera unit 3 with the lighting unit 9 and the proximity sensor 10 at an angle ensures that the light does not fall directly onto the user's eyes. The side-facing camera unit 3 with the lighting unit 9 and the proximity sensor 10 can, for example, only be used for capturing fingerprints and / or the biometric identity document.The front-facing camera unit 4 with the lighting unit 5 and the proximity sensor 6 can, for example, only be used for capturing the face and / or the biometric identity document.

[0064] Example 9 is based on Example 5. The only difference from Example 5 is that the camera unit 3 with the illumination unit 9 and the proximity sensor 10 is oriented downwards, particularly in relation to the orientation of the camera unit 4. The reason for this configuration may be the possible use of visible light (for illumination and / or for PAD - Presentation Attack Detection), which could dazzle the user if used frontally. The orientation of the camera unit 3 with the illumination unit 9 and the proximity sensor 10 at a downward angle ensures that the light does not fall directly onto the user's eyes. The downward-facing camera unit 3 with the illumination unit 9 and the proximity sensor 10 can, for example, only be used for capturing fingerprints and / or the biometric identity document.The front-facing camera unit 4 with the lighting unit 5 and the proximity sensor 6 can, for example, only be used for capturing the face and / or the biometric identity document.

[0065] Example 10 is based on Example 6. The only difference from Example 6 is that the camera unit 3 with the illumination unit 9 and the proximity sensor 10 is oriented downwards, particularly in relation to the orientation of the camera unit 4. The reason for this configuration may be the possible use of visible light (for illumination and / or for PAD - Presentation Attack Detection), which could dazzle the user if used frontally. The orientation of the camera unit 3 with the illumination unit 9 and the proximity sensor 10 at a downward angle ensures that the light does not fall directly onto the user's eyes. The downward-facing camera unit 3 with the illumination unit 9 and the proximity sensor 10 can, for example, only be used for capturing fingerprints and / or the biometric identity document.The front-facing camera unit 4 with the lighting unit 5 and the proximity sensor 6 can, for example, only be used for capturing the face and / or the biometric identity document.

[0066] All in the Fig. The embodiments shown in Figures 1A to 1D can be Fig. 2 and / or Fig. 3 can be designed with or without a mirror 12 and have a touch-sensitive display unit 2 (touch display), particularly when there is no need to use an array of proximity sensors 11, but the display unit 2 is intended to be touched with the user's fingers, particularly for operating the device 1. Alternatively, a contactless display unit 2 can be used. In this case, an array of proximity sensors 11 can be provided, which serves to detect a finger at a distance of a few centimeters from the device 1 for controlling the display unit 2.

[0067] All of the examples described above can further be equipped with a 3D camera 8, which can be used for precise positioning of the hand for recording fingerprints and / or facial recognition, for example, including detecting the correct position and distance of these biometric features and the biometric identity document. The 3D camera 8 can also be used for three-dimensional biometric recognition, in particular of the face and / or head, and the spatial geometry of the hand.

[0068] Fig. 2 differs from Fig. 3 in that in Fig. 3, a mirror 12 (for example, a front surface mirror) is provided. If the focal plane of the camera unit 4 (camera 4a with lens 4b) is or would be too far from the device 1, a mirror 12 can be used to extend the optical path.

[0069] The reader 7 or the antenna 7 for reading the biometric identity document can be arranged in different positions, as shown in the Fig. 1A to 1D. Another option is to arrange the antenna 7 around the illumination unit 5 or 9. The advantage of this is that the user presents the biometric identity document to the camera unit 4 or 3, and as the biometric identity document approaches the device 1, not only is optical information read from the biometric identity document, but the radio information can subsequently be read directly from the chip of the biometric identity document. LIST OF REFERENCE SYMBOLS 1 device 2 display unit 3 Camera unit 3a camera, camera chip, camera sensor 3b lens, objective 4 Camera unit 4a camera, camera chip, camera sensor 4b lens, lens 5 Lighting unit 6 Proximity sensor 7 Reader, antenna 8 3D camera 9 Lighting unit 10 Proximity sensor 11 Proximity sensor 12 mirrors 20 processing unit

Claims

[1] Contactless, multimodal biometric device (1) for the biometric verification and / or biometric identification of a person, comprising: - a processing unit (20), - a first camera unit (4) arranged to scan a space outside the biometric device (1) or in an open cavity of the biometric device (1) and comprising a first lens (4b) and a first camera sensor (4a) connected to a processing unit (20), and - a first proximity sensor (6) for measuring a distance of an object located in the space captured by the first camera unit (4) from the first proximity sensor (6), which is connected to the processing unit (20) for transmitting the measured distance values, - wherein the first lens (4b) is designed as a liquid lens and is connected to the processing unit (20) to receive signals for focusing it on the basis of the distance values measured by the first proximity sensor (6). [2] Contactless, multimodal biometric device (1) according to claim 1, further comprising a first illumination unit (5), in particular in the form of an array of lights, which are arranged in particular at a uniform angular distance around the first lens (4b). [3] Contactless multimodal biometric device (1) according to claim 1 or 2, further comprising a second camera unit (3) having a second camera sensor (3a) and a second lens (3b) connected to the processing unit (20). [4] A contactless multimodal biometric device (1) according to any one of the preceding claims, wherein the second lens (3b) is a liquid lens or a lens with a motorized focusing mechanism. [5] Contactless, multimodal biometric device (1) according to claim 3 or 4, wherein the second camera unit (3) is arranged to detect an area outside the biometric device (1), wherein the biometric device (1) has a second proximity sensor (10) arranged to measure a distance of an object arranged in the space detected by the second camera unit (3) from the second proximity sensor (10), and which is connected to the processing unit (20) for transmitting the measured distance values, - wherein the second lens (3b) is connected to the processing unit (20) to receive signals for focusing it on the basis of the distance values measured by the second proximity sensor (10). [6] Contactless, multimodal biometric device (1) according to one of claims 3 to 5, comprising a front side on which the second camera unit (3) and the first camera unit (4) are arranged below it. [7] Contactless, multimodal biometric device (1) according to one of claims 3 to 5, comprising a front side on which the second camera unit (3) is arranged and below on the front side an entrance to the open cavity in which a mirror (12) is arranged to reflect the space scanned by the first camera unit (4) in the open cavity. [8] Contactless, multimodal biometric device (1) according to one of the preceding claims, further comprising a reader (7) connected to the processing unit (20) for reading biometric identity documents, in particular chips arranged therein. [9] Contactless, multimodal biometric device (1) according to one of the preceding claims, further comprising a display unit (2) for displaying the identification results and / or verification results, connected to the processing unit (20). [10] Contactless, multimodal biometric device (1) according to one of the preceding claims, further comprising a 3D camera (8) arranged to capture the area outside the biometric device (1) and connected to the processing unit (20). [11] Method for operating the multimodal biometric device (1) according to one of the preceding claims, wherein by means of the first camera unit (4) a plurality of images of an inner palm of a hand with a plurality of focal planes in which the inner palm and / or fingertips of fingers of the hand are located are recorded and transmitted to the processing unit (20) by means of which a biometric identification is carried out. [12] The method according to claim 11, wherein three sets of images of the palm of the hand are recorded with multiple focal planes in which the palm of the hand and / or fingertips lie, wherein a first set is recorded when the palm of the hand is presented in a first position at right angles to an optical axis of the first camera unit (4), wherein a second set is recorded when the hand has been rotated to the left about a proximal-distal axis from this position, wherein a third set is recorded when the hand has been rotated to the right about the proximal-distal axis from the first position. [13] Method according to claim 11 or 12, wherein a machine-readable area of a page of a biometric identity document is captured by means of the first or second camera unit (4, 3), wherein characters present in the machine-readable area are recognized by the processing unit (20) and a key contained therein is extracted, wherein data are read from a chip present in the biometric identity document by means of the reading device (7) using the key. [14] Method according to one of claims 11 to 13, wherein by means of the second camera unit (3), triggered by the proximity sensor (10), using the lighting unit (9), at least one image of the face of a user is taken and transmitted to the processing unit (20) by which the biometric identification is carried out. [15] Method according to one of claims 11 to 14, wherein by means of the second camera unit (3), triggered by the proximity sensor (10), using the illumination unit (9), at least one image of a right iris and / or a left iris of a user is recorded and transmitted to the processing unit (20) by which the biometric identification is carried out. [16] Method according to one of claims 13 to 15, wherein fingerprints and / or a palm print are / is determined from the recorded images of the palm of the hand, wherein the determined fingerprints and / or the determined palm print are / is compared with a biometric pattern from the data read from the chip. [17] Method according to one of claims 14 to 16, wherein the captured image of the face and / or the image of the right iris and / or the left iris is compared with a biometric pattern from the data read from the chip. [18] Method according to one of claims 11 to 17, wherein a position and an orientation of the hand and / or the head of the user are checked by means of the 3D camera (8) and feedback is given to the user with the request to correct the position and / or orientation.

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