WO2019024306A1 - 手指静脉图像采集装置 - Google Patents

手指静脉图像采集装置 Download PDF

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Publication number
WO2019024306A1
WO2019024306A1 PCT/CN2017/109780 CN2017109780W WO2019024306A1 WO 2019024306 A1 WO2019024306 A1 WO 2019024306A1 CN 2017109780 W CN2017109780 W CN 2017109780W WO 2019024306 A1 WO2019024306 A1 WO 2019024306A1
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WO
WIPO (PCT)
Prior art keywords
infrared light
finger vein
vein image
finger
acquisition device
Prior art date
Application number
PCT/CN2017/109780
Other languages
English (en)
French (fr)
Inventor
闵浩
Original Assignee
南京东屋信息科技有限公司
南京东屋电气有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京东屋信息科技有限公司, 南京东屋电气有限公司 filed Critical 南京东屋信息科技有限公司
Priority to US15/572,541 priority Critical patent/US20200151480A1/en
Priority to JP2020528502A priority patent/JP2020529695A/ja
Priority to EP17920381.5A priority patent/EP3663964A4/en
Priority to KR1020207003187A priority patent/KR20200035954A/ko
Priority to SG11202000573VA priority patent/SG11202000573VA/en
Priority to CN201780059886.9A priority patent/CN109791606A/zh
Publication of WO2019024306A1 publication Critical patent/WO2019024306A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/143—Sensing or illuminating at different wavelengths
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/147—Details of sensors, e.g. sensor lenses
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/14—Vascular patterns
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00563—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys using personal physical data of the operator, e.g. finger prints, retinal images, voicepatterns
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
    • G07C9/00912—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses for safes, strong-rooms, vaults or the like
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/1341—Sensing with light passing through the finger

Definitions

  • the present invention relates generally to user identity verification, and more particularly to a plurality of finger vein image acquisition devices that provide high quality finger vein images and that are capable of preventing contamination or other light interference resulting in verification errors.
  • the conventional finger vein image acquisition device 400 includes a sensor body 401, a finger vein image imaging surface 405, and an infrared light emitting diode (LED) 409.
  • An infrared light emitting diode (LED) 409 illuminates the infrared light on the finger 407 and generates a finger vein image on the finger vein image imaging surface 405.
  • the finger vein image imaging surface 405 acquires a finger vein image for user authentication.
  • the finger vein image area acquired by the finger vein image imaging surface 405 is relatively small compared to the size of the finger 407.
  • the finger 407 often touches the finger vein image imaging surface 405, and the dirt accumulated on the finger vein image imaging surface 405 and the dirt on the finger surface may affect the authenticity of the finger vein image, which may cause an authentication error.
  • the sensor body 401 also has a narrow space 403 above the finger vein image imaging surface 405. If the narrow space 403 is wetted or accumulated with a small amount of water, the finger vein image capturing device 400 cannot function normally.
  • the finger vein image of the conventional finger vein image acquisition device faces upward, and other light sources such as sunlight, or other illumination sources may also interfere with the acquisition of the finger vein image. Therefore, the conventional finger vein image acquisition device can generally only be used indoors.
  • the invention relates to a finger vein image acquisition device.
  • the finger vein image acquisition device comprises: at least one image sensor for acquiring at least one finger vein image of a user, and an infrared light source disposed at the bottom of the finger vein image acquisition device.
  • the image sensor is configured to acquire an image of an imaging surface of a finger vein image located above the finger.
  • the finger is placed between the infrared light source and the image sensor, and the infrared light emitted by the infrared light source is irradiated upward to the finger, and a finger vein image is generated on the imaging surface of the finger vein image above the finger, the image The sensor acquires the finger vein image from the finger vein image imaging surface.
  • the present invention is directed to a finger vein image acquisition device.
  • the finger vein image acquisition device includes: at least one image sensor for acquiring at least one finger vein image of a user, one set in the hand An infrared light source at the bottom of the finger vein image capture device and an optical reflector between the image sensor and the infrared light source.
  • the image sensor is facing the user from the back to the front direction for collecting an image of the image of the finger vein image above the finger.
  • the optical reflector is for reflecting a bottom-up finger vein image to a front-to-back direction, and generating a finger vein image on the finger vein image imaging surface above the finger.
  • the finger is placed between the infrared light source and the image sensor, the infrared light emitted by the infrared light source is irradiated upward to the finger, and the bottom-up finger vein image is reflected by the optical reflector to the front
  • the posterior direction produces a finger vein image on the imaging surface of the finger vein image above the finger, and the finger vein image is acquired by the image sensor.
  • the present invention is directed to a finger vein image acquisition device.
  • the finger vein image acquisition device includes: at least one image sensor for acquiring at least one finger vein image of a user, an infrared light source disposed at a bottom of the finger vein image acquisition device, and one located between the image sensor and the infrared light source Optical reflector.
  • the image sensor is disposed on the right side of the top of the finger vein image acquisition device, facing from the right to the left toward the center of the finger vein image acquisition device, and the optical reflector is used to The bottom-up finger vein image is reflected to the left-to-right direction, and a finger vein image is generated on the finger vein image imaging surface above the finger.
  • the image sensor is disposed on the left side of the top of the finger vein image acquisition device, from left to right toward the center of the finger vein image acquisition device, and the optical reflector is used for
  • the bottom-up finger vein image is reflected to the right-to-left direction, and a finger vein image is generated on the finger vein image imaging surface above the finger.
  • the finger is placed between the infrared light source and the image sensor, the infrared light emitted by the infrared light source is irradiated upward to the finger, and the bottom-up finger vein image is reflected by the optical reflector to the left
  • a finger vein image is generated in the right direction and on the finger vein image imaging surface above the finger, and the finger vein image is acquired by the image sensor.
  • the infrared light source comprises a plurality of infrared light emitting diodes (LEDs), a plurality of infrared light bulbs, or any infrared light emitting device, the plurality of infrared light emitting diodes, a plurality of infrared light bulbs, or an infrared light emitting device according to One to many columns and one to many rows are arranged.
  • LEDs infrared light emitting diodes
  • the plurality of infrared light emitting diodes a plurality of infrared light bulbs, or an infrared light emitting device according to One to many columns and one to many rows are arranged.
  • the optical reflector comprises a mirror, a refractor, a Mitsubishi mirror, or any other optical reflective or refractive device.
  • the finger vein image acquisition device further includes a lens positioned between the finger and the image sensor, and an infrared light transmitted between the lens and the image sensor through the infrared light source Infrared bandpass filter.
  • the lens and the infrared band pass filter are used to improve the quality of the acquired finger vein image.
  • the finger vein image acquisition device further includes a housing of a finger vein image acquisition device, the housing including a top chamber and a placement for placing an image sensor, a lens and an infrared band pass filter Red The bottom bin of the external light source.
  • the lower surface of the top bin of the finger vein image capture device housing is constructed of a material that is transparent to infrared light emitted by the infrared source.
  • the upper surface of the bottom compartment of the finger vein image acquisition device housing constitutes a surface on which a finger is placed to transmit infrared light emitted by the infrared light source.
  • FIG. 1A is a side elevational view showing a finger vein image acquisition device 100 with an infrared light source on the lower image sensor, and FIG. 1B showing a side cross-sectional view of the finger vein image acquisition device 100, in accordance with some embodiments of the present invention
  • FIG. 2A is a side elevational view of a finger vein image acquisition device 102 with an infrared light source on the lower image sensor and a mirror
  • FIG. 2B shows the finger vein image acquisition device 102, in accordance with an embodiment of the present invention.
  • Side view FIG. 2C is a side elevational view of an infrared light source on the lower image sensor and a triangular prism finger vein image capture device 102
  • FIG. 2D shows the finger vein, in accordance with yet another embodiment of the present invention.
  • FIG. 3A is a front elevational view showing an infrared light source on the lower image sensor and a mirror vein image capturing device 104
  • FIG. 3B shows the side of the finger vein image capturing device 104
  • 3C shows a front cross-sectional view of the finger vein image acquisition device 104
  • FIG. 3D shows a side cross-sectional view of the finger vein image acquisition device 104
  • FIG. 3E shows a further embodiment according to the present invention.
  • FIG. 3F shows a side view of the finger vein image capture device 104
  • FIG. 3G shows the finger vein image.
  • FIG. 3H shows a side cross-sectional view of the finger vein image acquisition device 104;
  • FIG. 4A shows a front view of a conventional finger vein image acquisition device 400, and FIG. 4A shows a side view of a conventional finger vein image acquisition device 400.
  • first, second, third, etc. may be used herein to describe various elements, devices, regions, layers and/or portions, these elements, devices, regions, layers and/or portions should not be Limitations of these terms. The terms are only used to distinguish one element, device, region, layer or portion, and another element, device, region, layer or portion. Therefore, a first element, device, region, layer or portion discussed below may be referred to as a second element, device, region, layer or portion, without departing from the teachings of the invention.
  • the conventional finger vein image acquisition device 400 has a drawback that the finger vein image area acquired by the finger vein image imaging surface 405 is relatively small compared to the size of the finger 407. Therefore, only a small portion of the finger vein image can be used for user authentication. This makes the user authentication less reliable.
  • the finger 407 often touches the finger vein image imaging surface 405, and the dirt accumulated on the finger vein image imaging surface 405 and the dirt on the finger surface may affect the authenticity of the finger vein image, which may cause an authentication error.
  • the sensor body 401 has a narrow space 403 above the finger vein image imaging surface 405.
  • the finger vein image capturing device 400 cannot function normally.
  • the finger vein image of the conventional finger vein image acquisition device faces upward, and other light sources such as sunlight, or other illumination sources may also interfere with the acquisition of the finger vein image. Therefore, the conventional finger vein image acquisition device can generally only be used indoors.
  • the patented invention describes a plurality of finger vein image acquisition devices which are capable of providing a larger finger vein image and thus can improve the accuracy of user authentication. These finger vein image acquisition devices can eliminate user authentication errors caused by dirt on the finger vein image imaging surface 405. These finger vein image acquisition devices also avoid the phenomenon of malfunction due to wet or stagnant water on the imaging surface 405 of the finger vein image.
  • the present invention is directed to a finger vein image acquisition device 100.
  • the finger vein image acquisition device 100 includes: at least one image sensor 1006 for acquiring a vein image of at least one finger 1004 of a user, and an image sensor 1006 disposed at the bottom of the finger vein image collection device 100.
  • the image sensor 1006 is used to capture an image of the finger vein image imaging surface 10051 located above the finger.
  • the finger 1004 is placed between the infrared light source 1001 and the image sensor 1006, and the infrared light source 1001 is issued.
  • the infrared light is irradiated upward to the finger 1004, and a finger vein image is generated on the finger vein image imaging surface 10051 above the finger, and the image sensor 1006 acquires the finger vein image from the finger vein image imaging surface 10051.
  • the infrared light source 1001 includes a plurality of infrared light emitting diodes (LEDs), a plurality of infrared light bulbs, or any infrared light emitting device, the plurality of infrared light emitting diodes, a plurality of infrared light bulbs, or an infrared light emitting device. Arrange in one to many columns and one to many rows. As shown in FIG. 1A and FIG.
  • the infrared light source 1001 includes at least three infrared light emitting diodes: a first infrared light emitting diode 10011, a second infrared light emitting diode 10012, and a third infrared light emitting diode 10013.
  • the three infrared light emitting lights Diodes 10011, 10012 and 10013 form a column of infrared illumination sources 1001.
  • infrared illumination source 1001 may comprise multiple rows and columns of infrared light emitting diodes, infrared light bulbs, or any other infrared light emitting device.
  • the other columns of infrared illumination sources 1001 are not shown in Figures 1A and 1B.
  • Such multiple columns and rows of infrared illumination sources 1001 can provide very strong, very uniform infrared light. This infrared light has a strong ability to penetrate fingers and can produce larger, clearer finger vein images.
  • the finger vein image acquisition device 100 further includes a surface 1002 for placing a finger 1004 that is permeable to infrared light emitted by the infrared source.
  • the surface 1002 of the finger 1004 that transmits infrared light emitted through the infrared light source allows the user to place a finger thereon, so that the finger vein image generated at the fixed position is more stable and does not cause the finger 1004 to move up and down. The image of the finger vein is distorted.
  • the finger vein image acquisition device 100 can also include a lens 1005.
  • the lens 1005 is disposed between the finger 1004 and the image sensor 1006.
  • the surface of the lens 1005 constitutes a finger vein image imaging surface 10051 above the finger, and the infrared light generated by the infrared light source 1001 generates a finger vein image on the finger vein image imaging surface 10051 above the finger.
  • the finger vein image acquisition device 100 can acquire a very consistent, high quality finger vein image. Such high quality finger vein images can further improve the accuracy and reliability of user identification of the finger vein image acquisition device 100.
  • the finger vein image acquisition device 100 further includes an infrared band pass filter 1007.
  • the infrared band pass filter 1007 is disposed between the lens 1005 and the image sensor 1006.
  • the infrared band pass filter 1007 only allows infrared light to pass, eliminating interference of light other than infrared light, and thus improving the quality of the acquired finger vein image.
  • the finger vein image acquisition device 100 further includes a housing 1003 of a finger vein image acquisition device.
  • the outer casing 1003 includes a top bin and a bottom bin.
  • the top bin of the housing 1003 is used to house an image sensor 1006, a lens 1005 and an infrared bandpass filter 1007.
  • the bottom compartment of the outer casing 1003 is used to place the infrared light source 1001.
  • the upper surface of the bottom compartment of the finger vein image acquisition device housing 1003 constitutes the A surface 1002 of the finger that transmits infrared light emitted by the infrared source is placed.
  • the infrared light source 1001 located at the bottom bin radiates infrared light from the bottom up by the surface 1002 of the finger that transmits the infrared light emitted through the infrared light source, and generates the finger vein image.
  • the lower surface 10031 of the top bin of the finger vein image capturing device housing 1003 is made of a material that can transmit infrared light emitted from the infrared light source for transmitting the generated finger vein image to the top bin so as to pass through the lens 1005. Focusing, the infrared bandpass filter 1007 filters out interference of various light rays other than infrared rays, and the corresponding finger vein image is acquired by the image sensor 1006.
  • the finger vein image generated by the finger vein image capturing device 100 is larger and clearer than the finger vein image generated by the conventional finger vein image capturing device 400.
  • the finger vein image imaging surface 405 is often touched when the user uses the conventional finger vein image acquisition device 400. Any dirt present on the imaging surface 405 of the finger vein image, such as dirt accumulated on the imaging surface 405 of the finger vein image, and dirt on the surface of the finger 407 are captured by the conventional finger vein image acquisition device 400. These contaminated finger vein images can cause user authentication errors. The above-described finger vein image acquisition device 100 can avoid such errors.
  • any dirt present on the surface 1002 of the finger that is permeable to infrared light emitted by the infrared source such as dirt deposited on the surface 1002 of the finger that transmits infrared light emitted by the infrared source, the surface of the finger 1004
  • the dirt is not captured by the image sensor 1006. Since the water or water accumulated on the surface 1002 of the infrared light emitted by the infrared light source is transparent, the surface 1002 of the infrared light emitted by the infrared light source is placed on the finger. Neither water marks nor accumulated water is captured by the image sensor 1006 or causes distortion of the finger vein image, so the finger vein image capturing device 100 does not malfunction.
  • the image imaging surface of the finger vein image capturing device 100 is above the finger, interference caused by other light sources such as sunlight or other illumination sources to the collection of the finger vein image is avoided. Therefore, the obtained finger vein image is not interfered by the external light source, and the image quality is high, so that the accuracy of the user identity verification can be improved.
  • the top cover of the outer casing 1003 of the finger vein image capturing device to the outer casing 1003 of the finger vein image capturing device is a bottom-up optical path
  • the image sensor 1006 is at a certain distance from the finger 1004 placed on the surface 1002 of the infrared light that is transmitted through the infrared source. This may cause the outer casing 1003 of the finger vein image acquisition device to become tall.
  • some of the finger vein image capture devices 102 and 104 with optical reflectors are described below. These finger vein image capturing devices 102 and 104 can reflect the bottom-up optical path from front to back, left to right, or right to left optical path through an optical reflector to lower the finger vein image capturing devices 102 and 104. the height of.
  • the present invention is directed to a finger vein image acquisition device 102.
  • the finger vein image collection device 102 includes:
  • At least one image sensor 1026 for acquiring a vein image of at least one finger of a user, one An infrared light source 1021 disposed at the bottom of the finger vein image capture device and an optical reflector 1028 positioned between the image sensor 1026 and the infrared light source 1021.
  • the image sensor 1026 described therein faces the user in a direction from the back to the front for collecting an image of the finger vein image imaging surface 10251 located above the finger 1024.
  • the optical reflector 1028 is for reflecting the bottom-up finger vein image to the front-to-back direction, and generates a finger vein image on the finger vein image imaging surface 10251 above the finger 1024.
  • the finger 1024 is placed between the infrared light source 1021 and the image sensor 1026, and the infrared light emitted by the infrared light source 1021 is irradiated upward to the finger 1024, and the bottom-up finger vein image is optically reflected.
  • the device 1028 reflects the direction from front to back and generates a finger vein image on the finger vein image imaging surface 10251 above the finger, which is acquired by the image sensor 1026.
  • the optical reflector 1028 is a mirror 10281. In other embodiments, as shown in Figures 2C and 2D, the optical reflector 1028 is a triangular prism 10282. In still other embodiments, the optical reflector 1028 can be any other optical reflective or refractive device.
  • the infrared light source 1021 includes a plurality of infrared light emitting diodes (LEDs), a plurality of infrared light bulbs, or any infrared light emitting device, the plurality of infrared light emitting diodes, a plurality of infrared light bulbs, or an infrared light emitting device. Arrange in one to many columns and one to many rows. As shown in FIG. 2A and FIG.
  • the infrared light source 1021 includes at least three infrared light emitting diodes: a first infrared light emitting diode 10211, a second infrared light emitting diode 10212, and a third infrared light emitting diode 10213. Diodes 10211, 10212 and 10213 form a column of infrared illumination sources 1021.
  • infrared illumination source 1021 may comprise multiple rows and columns of infrared light emitting diodes, infrared light bulbs, or any other infrared light emitting device. The other columns of infrared illumination sources 1021 are not shown in Figures 2A and 2B. Such multiple columns and rows of infrared illumination sources 1021 can provide very strong, very uniform infrared light. This infrared light has a strong ability to penetrate fingers and can produce larger, clearer finger vein images.
  • the finger vein image acquisition device 102 further includes a surface 1022 for placing a finger 1024 that is permeable to infrared light emitted by the infrared source.
  • the surface 1022 of the finger 1024 that can transmit the infrared light emitted by the infrared light source allows the user to place the finger on the top, so that the finger vein image generated at the fixed position is more stable, and the finger 1024 does not move up and down. The image of the finger vein is distorted.
  • the finger vein image acquisition device 102 can also include a lens 1025.
  • the lens 1025 is disposed between the finger 1024 and the image sensor 1026.
  • the lens 1025 focuses on a finger vein image produced on a surface 1022 of a finger 1024 that is permeable to infrared light emitted by the infrared source.
  • the finger vein image acquisition device 102 can acquire a very consistent, high quality finger vein image. Such high quality finger vein images can further improve the accuracy and reliability of user authentication of the finger vein image acquisition device 102.
  • the finger vein image acquisition device 102 further includes an infrared band pass filter 1027.
  • the infrared band pass filter 1027 is disposed between the lens 1025 and the image sensor 1026.
  • the infrared band pass filter 1027 allows only infrared light to pass, eliminating interference of light other than infrared light, and thus improving the quality of the acquired finger vein image.
  • the finger vein image acquisition device 102 further includes a housing 1023 of a finger vein image acquisition device.
  • the outer casing 1023 includes a top bin and a bottom bin.
  • the top bin of the housing 1023 is used to house an image sensor 1026, a lens 1025 and an infrared bandpass filter 1027.
  • the bottom compartment of the outer casing 1023 is used to place the infrared light source 1021.
  • the upper surface of the bottom compartment of the finger vein image capture device housing 1023 constitutes the surface 1022 of the finger that is permeable to infrared light emitted by the infrared source.
  • the infrared light source 1021 located at the bottom bin radiates infrared light from the bottom up by the surface 1022 of the finger that transmits the infrared light emitted through the infrared light source, and generates the finger vein image.
  • the lower surface 10231 of the top bin of the finger vein image capturing device housing 1023 is made of a material that can transmit infrared light emitted through the infrared light source for transmitting the generated finger vein image to the top bin so as to pass through the lens 1025. Focusing, the infrared bandpass filter 1027 filters out interference from various rays other than the infrared, and the image sensor 1026 acquires the corresponding finger vein image.
  • the present invention is directed to a finger vein image acquisition device 104.
  • the finger vein image acquisition device 104 includes at least one image sensor 1046 for acquiring a vein image of at least one finger 1044 of a user, an infrared light source 1041 disposed at the bottom of the finger vein image collection device 104, and an image sensor.
  • the image sensor 1046 is disposed on the right side of the top of the finger vein image acquisition device 104, facing from the right to the left toward the center of the finger vein image acquisition device 104, and the optical reflector 1048 is It is used to reflect the bottom-up finger vein image to the left-to-right direction, and to generate a finger vein image on the finger vein image imaging surface 10451 above the finger 1044.
  • the image sensor is disposed on the left side of the top of the finger vein image collection device 104, from left to right toward the center of the finger vein image acquisition device 104, and the optical reflector 1048 is It is used to reflect the bottom-up finger vein image to the right-to-left direction, and to generate a finger vein image on the finger vein image imaging surface 10451 above the finger 1044.
  • the finger 1046 is placed between the infrared light source 1041 and the image sensor 1046.
  • the infrared light emitted by the infrared light source 1041 is irradiated upward to the finger 1044, and the bottom-up finger vein image is reflected by the optical reflection.
  • the device 1048 reflects the direction from left to right, or from right to left, and generates a finger vein image on the finger vein image imaging surface 10451 above the finger 1046, which is acquired by the image sensor 1046.
  • the optical reflector 1048 is a mirror 10481. In other embodiments, as shown in Figures 3E, 3F, 3G and 3H, the optical reflector 1048 is a triangular prism 10482. In still other embodiments, the optical reflector 1048 can be any other optical reflection Or refractive device.
  • the infrared light source 1041 comprises a plurality of infrared light emitting diodes (LEDs), a plurality of infrared light bulbs, or any infrared light emitting device, the plurality of infrared light emitting diodes, a plurality of infrared light bulbs, or an infrared light emitting device. Arrange in one to many columns and one to many rows. As shown in FIG. 3A, FIG. 3C, FIG. 3E and FIG.
  • the infrared light source 1041 includes at least three infrared light emitting diodes: a first infrared light emitting diode 10411, a second infrared light emitting diode 10412, and a third infrared light emitting diode 10413.
  • the infrared light source 1041 includes at least three infrared light emitting diodes: a third infrared light emitting diode 10413, a fourth infrared light emitting diode 10414, and a fifth infrared light emitting diode 10415.
  • the infrared light source 1041 is actually a matrix of three rows and three columns of infrared light emitting diodes.
  • infrared illumination source 1041 may comprise multiple rows and columns of infrared light emitting diodes, infrared light bulbs, or any other infrared light emitting device.
  • Such multiple columns and rows of infrared illumination sources 1041 can provide very strong, very uniform infrared light. This infrared light has a strong ability to penetrate fingers and can produce larger, clearer finger vein images.
  • the finger vein image capture device 104 further includes a surface 1042 for placing a finger 1044 that transmits infrared light through the infrared source.
  • the surface 1042 of the finger 1044 that can transmit the infrared light emitted by the infrared light source allows the user to place the finger thereon, so that the finger vein image generated at the fixed position is more stable and does not cause the finger 1044 to move up and down. The image of the finger vein is distorted.
  • the finger vein image acquisition device 104 can also include a lens 1045.
  • the lens 1045 is disposed between the finger 1044 and the image sensor 1046.
  • the lens 1045 focuses on a finger vein image produced on a surface 1042 of a finger 1044 that is permeable to infrared light emitted by the infrared source.
  • the finger vein image acquisition device 104 can acquire a very consistent, high quality finger vein image. Such high quality finger vein images can further improve the accuracy and reliability of user authentication of the finger vein image acquisition device 104.
  • the finger vein image acquisition device 104 further includes an infrared band pass filter 1047.
  • the infrared band pass filter 1047 is disposed between the lens 1045 and the image sensor 1046.
  • the infrared band pass filter 1047 allows only infrared light to pass, eliminating interference of light other than infrared light, and thus improving the quality of the acquired finger vein image.
  • the finger vein image acquisition device 104 further includes a housing 1043 for a finger vein image acquisition device.
  • the outer casing 1043 includes a top bin and a bottom bin.
  • the top compartment of the outer casing 1043 is used to house an image sensor 1046, a lens 1045 and an infrared band pass filter 1047.
  • the bottom compartment of the outer casing 1043 is used to place the infrared light source 1041.
  • the upper surface of the bottom compartment of the finger vein image capture device housing 1043 constitutes the surface 1042 of the finger that is permeable to infrared light emitted by the infrared source.
  • the infrared light source 1041 radiates infrared light from the bottom up by the surface 1042 of the finger that transmits the infrared light emitted through the infrared light source, and generates the finger vein image.
  • the lower surface 10431 of the top bin of the finger vein image capturing device housing 1043 is made of a material that can transmit infrared light emitted through the infrared light source for transmitting the generated finger vein image to the top bin to pass through the lens 1045. Focusing, the infrared bandpass filter 1047 filters out interference from various rays other than infrared, and the corresponding finger vein image is acquired by the image sensor 1046.

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Abstract

一种手指静脉图像采集装置（100），包括：至少一个用于获取一个使用者的至少一个手指（1004）静脉图像的图像传感器（1006），和设置于手指静脉图像采集装置（100）底部的红外光源（1001）。所述的图像传感器（1006）用于采集位于手指（1004）上方的手指静脉图像成像面（10051）的图像。红外光源（1001）包括一定数量的红外发光二极管，或红外发光灯，这些红外发光二极管或红外发光灯可以排列成一到多行和一到多列，并安装在手指静脉图像采集装置（100）的底部。所述的手指（1004）放置在所述的红外光源（1001）和图像传感器（1006）之间，红外光源（1006）发出的红外光向上照射到所述的手指（1004），在手指（1004）上方的手指静脉图像成像面（10051）上产生手指静脉图像，所述的图像传感器（1006）从手指静脉图像成像面（10051）获取所述手指静脉图像。

Description

手指静脉图像采集装置 技术领域
本发明一般涉及用户身份验证，尤其具体的涉及到多种可以提供高质量手指静脉图像，并能够防止污染或其它光线干扰而造成验证错误的手指静脉图像采集装置。
背景技术
手指静脉图像采集装置已广泛用于用户身份验证。然而，常规的手指静脉图像采集装置有一些需要改进的问题。如来自相关技术的图4A和图4B所示，常规的手指静脉图像采集装置400包括传感器本体401，一个手指静脉图像成像表面405，和一个红外发光二极管(LED)409。红外发光二极管(LED)409将红外光照射在手指407上并在手指静脉图像成像表面405生成手指静脉图像。手指静脉图像成像表面405获取用于用户身份验证的手指静脉图像。如图4A和图4B所示，与手指407的大小相比，手指静脉图像成像表面405获取的手指静脉图像面积相对较小。因此，只有手指静脉图像的一小部分可以用来进行用户身份验证。这样用户身份验证的可靠性较低。手指407经常会触摸到手指静脉图像成像表面405，手指静脉图像成像表面405上积有的污垢和手指表面带有的污垢都可能影响手指静脉图像的真实性，而这些污垢可能导致身份验证错误。如图4A和图4B所示，传感器本体401在手指静脉图像成像表面405上方还有一个狭小的空间403。如果这个狭小的空间403被弄湿或积有少量的水，那么这个手指静脉图像采集装置400就不能正常工作。此外，常规的手指静脉图像采集装置的手指静脉图像成像面朝上，其它光源如阳光，或其它照明光源也可能对手指静脉图像的采集产生干扰。因此，传统的手指静脉图像采集装置一般只能用于室内。
发明内容
一方面，本发明涉及一种手指静脉图像采集装置。所述的手指静脉图像采集装置，包括：至少一个用于获取一个使用者的至少一个手指静脉图像的图像传感器，和一个设置于手指静脉图像采集装置底部的红外光源。所述的图像传感器用于采集位于手指上方的手指静脉图像成像面的图像。所述的手指放置在所述的红外光源和图像传感器之间，红外光源发出的红外光向上照射到所述的手指，在手指上方的手指静脉图像成像面上产生手指静脉图像，所述的图像传感器从手指静脉图像成像面获取所述手指静脉图像。
在另一方面，本发明涉及一种手指静脉图像采集装置。所述手指静脉图像采集装置包括：至少一个用于获取一个使用者的至少一个手指静脉图像的图像传感器，一个设置于手 指静脉图像采集装置底部的红外光源和一个位于图像传感器和红外光源之间的光学反射器。其中所述的图像传感器从后往前方向面对使用者，用于采集位于手指上方的手指静脉图像成像面的图像。所述的光学反射器是用于将自下而上的手指静脉图像反射到从前到后的方向，并在手指上方的手指静脉图像成像面上产生手指静脉图像。所述的手指放置在所述的红外光源和图像传感器之间，红外光源发出的红外光向上照射到所述的手指，自下而上的手指静脉图像经所述的光学反射器反射到从前到后的方向并在手指上方的手指静脉图像成像面上产生手指静脉图像，由图像传感器获取所述手指静脉图像。
在又一方面，本发明涉及一种手指静脉图像采集装置。所述的手指静脉图像采集装置包括：至少一个用于获取一个使用者的至少一个手指静脉图像的图像传感器，一个设置于手指静脉图像采集装置底部的红外光源和一个位于图像传感器和红外光源之间的光学反射器。在一个实施例中，所述的图像传感器设置于手指静脉图像采集装置的顶部的右侧，从右向左面向所述手指静脉图像采集装置的中心，所述的光学反射器是用于将自下而上的手指静脉图像反射到从左到右的方向，并在手指上方的手指静脉图像成像面上产生手指静脉图像。在另一实施例中，所述的图像传感器设置于手指静脉图像采集装置的顶部的左侧，从左向右面向所述手指静脉图像采集装置的中心，所述的光学反射器是用于将自下而上的手指静脉图像反射到从右到左的方向，并在手指上方的手指静脉图像成像面上产生手指静脉图像。所述的手指放置在所述的红外光源和图像传感器之间，红外光源发出的红外光向上照射到所述的手指，自下而上的手指静脉图像经所述的光学反射器反射到从左到右的方向并在手指上方的手指静脉图像成像面上产生手指静脉图像，由图像传感器获取所述手指静脉图像。
在某些实施例中，所述红外光源包含多个红外发光二极管(LED)，多个红外灯泡，或任何红外发光器件，所述多个红外发光二极管，多个红外灯泡，或红外发光器件按照一到多列和一到多行排列。
在某些实施例中，所述的光学反射器包括反射镜，折射镜，三菱镜，或其它任何光学反射或折射器件。
在某些实施例中，所述的手指静脉图像采集装置还包括一个位于手指和图像传感器之间的镜头，和一个位于所述镜头和图像传感器之间可透过所述红外光源发出的红外光的红外带通滤光片。所述镜头和所述红外带通滤光片用于提高所获取的手指静脉图像的质量。
在某些实施例中，所述的手指静脉图像采集装置还包括一个手指静脉图像采集装置的外壳，所述的外壳包含一个放置图像传感器，镜头和红外带通滤光片的顶仓和一个放置红 外光源的底仓。所述手指静脉图像采集装置外壳的顶仓的下表面是由可透过所述红外光源发出的红外光的的材料构成。所述手指静脉图像采集装置外壳的底仓的上表面构成一个放置手指的可透过所述红外光源发出的红外光的表面。
本发明的这些和其它方面将通过结合以下图式获得的优选实施例的以下描述而变得清楚，但可以在不脱离本发明的新颖概念的精神和范围的情况下实现这些和其它方面的变化和修改。
附图说明
附图说明本发明的一个或多个实施例，且与书面描述一起用以解释本发明的原理。在可能的情况下，相同的参考标号在所有图式中尽量用于指代实施例的相同或相似元件。附图并不能将本发明限于本文中所揭示和描述的具体实施例。附图不一定按适当的比例绘制，而是将重点放在清晰地说明本发明的原理上，并且其中：
图1A根据本发明的某些实施例，显示了一种红外光源在下图像传感器在上的手指静脉图像采集装置100的侧视示意图，图1B显示了手指静脉图像采集装置100的侧视截面图；
图2A根据本发明的一个实施例，显示了一种红外光源在下图像传感器在上以及一个反射镜的手指静脉图像采集装置102的侧视示意图，图2B显示了所述手指静脉图像采集装置102的侧视截面图，图2C根据本发明的又一实施例，显示了一种红外光源在下图像传感器在上以及一个三棱镜的手指静脉图像采集装置102的侧视示意图，图2D显示了所述手指静脉图像采集装置102的侧视截面图；
图3A根据本发明的一个实施例，显示了一种红外光源在下图像传感器在上以及一个反射镜的手指静脉图像采集装置104的正视示意图，图3B显示了所述手指静脉图像采集装置104的侧视示意图，图3C显示了所述手指静脉图像采集装置104的正视截面图，图3D显示了所述手指静脉图像采集装置104的侧视截面图；图3E根据本发明的又一个实施例，显示了一种红外光源在下图像传感器在上以及一个三棱镜的手指静脉图像采集装置104的正视示意图，图3F显示了所述手指静脉图像采集装置104的侧视示意图，图3G显示了所述手指静脉图像采集装置104的正视截面图，图3H显示了所述手指静脉图像采集装置104的侧视截面图；和
图4A显示了一种常规的手指静脉图像采集装置400的正视示意图，和图4A显示了一种常规的手指静脉图像采集装置400的侧视示意图。
具体实施方式
现将参考附图在下文中更加全面地描述本发明，在这些附图中示出了本发明的示例性实施例。然而，本发明可以用许多不同形式实施，并且不应被解释为限于本文所阐述的实施例。确切地说，提供这些实施例是为了使得本发明将为透彻且完整的，并且这些实施例将向所属领域的技术人员充分传达本发明的范围。类似参考标号通篇指代类似元件。
应理解，当元件被称作“在”另一元件“上”时，其可以直接在所述另一元件上或可在其之间存在中间元件。相比之下，当元件被称作“直接在”另一元件“上”时，不存在插入元件。如本文中所使用，术语“和/或”包含相关联的所列项中的一个或多个的任何以及所有组合。
应理解，虽然本文中可以使用术语第一、第二、第三等来描述各种元件、装置、区域、层和/或部分，但是这些元件、装置、区域、层和/或部分不应受到这些术语的限制。这些术语仅用于区分一个元件、装置、区域、层或部分与另一元件、装置、区域、层或部分。因此，在不脱离本发明的教示内容的情况下，下文所论述的第一元件、装置、区域、层或部分可以称为第二元件、装置、区域、层或部分。
本文中所使用的术语仅出于描述具体实施例的目的，且并不意图限制本发明。如本文中所使用，除非上下文另外明确指示，否则单数形式“一”和“所述”也既定包含复数形式。应进一步理解，当在本文中使用时，术语“包括”或“包含”或“具有”指明存在所陈述的特征、区域、整数、步骤、操作、元件和/或装置，但不排除存在或添加一个或多个其它特征、区域、整数、步骤、操作、元件、装置和/或其群组。
此外，本文中可以使用例如“下部”或“底部”、“上部”或“顶部”和“前部”或“后部”等相关术语来描述如图式中所示的一个元件与另一元件的关系。应理解，相关术语既定涵盖除图式中所描绘的定向以外的装置的不同定向。例如，如果一个图式中的装置翻转，那么描述成位于其它元件的“下部”侧面上的元件将定向在所述其它元件的“上部”侧面上。因此，示例性术语“下部”可取决于图式的具体定向而涵盖“下部”和“上部”的定向。类似地，如果一个图式中的装置翻转，那么描述成位于其它元件“之下”或“下方”的元件将定向在所述其它元件“上方”。因此，示例性术语“之下”或“下方”可涵盖上方和下方两种定向。
除非另外定义，否则本文中所用的所有术语(包含技术和科技术语)具有与本发明所 属领域的技术人员的通常所理解相同的意义。将进一步理解，术语(如在常用词典中所定义的那些术语)应解释为具有与其在相关技术和本发明的上下文中的含义一致的含义，并且除非本文中明确地定义，否则将不会以理想化或过分正式意义进行解释。
在以下描述中提供许多具体细节以使本发明得到全面理解，但本发明还可以通过使用与本文中所描述的方式不同的其它方式来实施，因此本发明并不限于在下文中揭示的具体实施例。
在参考附图后，本发明在这里会被描述的更完整，因为附图中所示了本发明的实施例。但本发明可能用不同的形式被具体化，而且不能被理解为局限于这里阐述的这些实施例。相反地，提供这些实施例，本发明可以更加全面和完整，并且会充分传达本发明的范围给该领域的技术人员。相同的数字通常指的是相同的元件。
如来自相关技术的图4A和图4B所示，常规的手指静脉图像采集装置400具有以下的缺陷：与手指407的大小相比，手指静脉图像成像表面405获取的手指静脉图像面积相对较小。因此，只有手指静脉图像的一小部分可以用来进行用户身份验证。这样用户身份验证的可靠性较低。手指407经常会触摸到手指静脉图像成像表面405，手指静脉图像成像表面405上积有的污垢和手指表面带有的污垢都可能影响手指静脉图像的真实性，而这些污垢可能导致身份验证错误。此外，传感器本体401在手指静脉图像成像表面405上方还有一个狭小的空间403。如果这个狭小的空间403被弄湿或积有少量的水，那么这个手指静脉图像采集装置400就不能正常工作。此外，常规的手指静脉图像采集装置的手指静脉图像成像面朝上，其它光源如阳光，或其它照明光源也可能对手指静脉图像的采集产生干扰。因此，传统的手指静脉图像采集装置一般只能用于室内。下面，结合相应的附图，本书专利发明描述了多个手指静脉图像采集装置，这些手指静脉图像采集装置能够提供较大的手指静脉图像因此可以提高用户身份验证的准确性。这些手指静脉图像采集装置可以消除手指静脉图像成像表面405上的污垢造成的用户身份验证错误。这些手指静脉图像采集装置还可以避免由于手指静脉图像成像表面405上潮湿或积水而失灵的现象。
下面将结合附图1到3来对本发明的某些实施例进行详细的描述。
在一方面，如图1A和图1B所示，本发明涉及一种手指静脉图像采集装置100。在某些实施例中，所述的手指静脉图像采集装置100包括：至少一个用于获取一个使用者的至少一个手指1004静脉图像的图像传感器1006，和一个设置于手指静脉图像采集装置100底部的红外光源1001。所述的图像传感器1006用于采集位于手指上方的手指静脉图像成像面10051的图像。所述的手指1004放置在所述的红外光源1001和图像传感器1006之间，红外光源1001发 出的红外光向上照射到所述的手指1004，在手指上方的手指静脉图像成像面10051上产生手指静脉图像，所述的图像传感器1006从手指静脉图像成像面10051获取所述手指静脉图像。
在某些实施例中，所述红外光源1001包含多个红外发光二极管(LED)，多个红外灯泡，或任何红外发光器件，所述多个红外发光二极管，多个红外灯泡，或红外发光器件按照一到多列和一到多行排列。如图1A和图1B所示，所述红外光源1001包含至少包含三个红外发光二极管：第一红外发光二极管10011，第二红外发光二极管10012，和第三红外发光二极管10013.这三个红外发光二极管10011，10012和10013形成了一列红外发光源1001。在某些实施例中，红外发光源1001可能包含多行和多列红外发光二极管，红外灯泡或其它任何红外发光器件。其它列的红外发光源1001没有在图1A和图1B中显示。这样多列和多行的红外发光源1001可以提供很强，并且非常均匀的红外光。这种红外光有很强的穿透手指的能力，可以产生较大尺寸，更清晰的手指静脉图像。
在某些实施例中，所述的手指静脉图像采集装置100还包括一个用来放置手指1004的可透过所述红外光源发出的红外光的表面1002。这个放置手指1004的可透过所述红外光源发出的红外光的表面1002可以让用户将手指放在上面，这样在固定位置产生的手指静脉图像更稳定，不会产生由于手指1004上下移动而造成的手指静脉图像失真。
在某些实施例中，所述的手指静脉图像采集装置100还可以包含一个镜头1005。所述镜头1005设置在手指1004和图像传感器1006之间。所述镜头1005的表面构成手指上方的手指静脉图像成像面10051，红外光源1001产生的红外光在手指上方的手指静脉图像成像面10051上产生手指静脉图像。结合使用镜头1005和放置手指1004的可透过所述红外光源发出的红外光的表面1002，所述的手指静脉图像采集装置100可以获取非常一致，高质量的手指静脉图像。这样高质量的手指静脉图像可以进一步提高手指静脉图像采集装置100的用户身份验证的准确性和可靠性。
在某些实施例中，所述的手指静脉图像采集装置100还包括一个红外带通滤光片1007。所述红外带通滤光片1007设置于所述镜头1005和图像传感器1006之间。所述红外带通滤光片1007仅允许红外光通过，消除了除红外光以外其它光线的干扰，因而也提高了所获取的手指静脉图像的质量。
在某些实施例中，如图1B所示，所述的手指静脉图像采集装置100还包括一个手指静脉图像采集装置的外壳1003。所述的外壳1003包含一个顶仓和一个底仓。所述的外壳1003的顶仓用于放置图像传感器1006，镜头1005和红外带通滤光片1007。所述的外壳1003的底仓用于放置红外光源1001。所述手指静脉图像采集装置外壳1003的底仓的上表面构成所述的 放置手指的可透过所述红外光源发出的红外光的表面1002。位于底仓的红外光源1001通过所述的放置手指的可透过所述红外光源发出的红外光的表面1002自下而上辐射红外光，并产生所述手指静脉图像。所述手指静脉图像采集装置外壳1003的顶仓的下表面10031是由可透过所述红外光源发出的红外光的材料构成用于将产生的手指静脉图像传入顶仓，以便通过镜头1005的聚焦，通过红外带通滤光片1007滤掉红外以外各种光线的干扰，由图像传感器1006获取相应的手指静脉图像。
所述的手指静脉图像采集装置100所产生的手指静脉图像要比常规的手指静脉图像采集装置400所产生的手指静脉图像更大，更清晰。用户使用常规的手指静脉图像采集装置400时经常会触摸到手指静脉图像成像表面405。任何出现在手指静脉图像成像表面405的污垢，如手指静脉图像成像表面405上陈积的污垢，手指407表面的污垢都会被常规的手指静脉图像采集装置400获取。这些受到污染的手指静脉图像会导致用户身份验证的错误。上述的手指静脉图像采集装置100可以避免这类的错误。任何出现在放置手指的可透过所述红外光源发出的红外光的表面1002的污垢，如放置手指的可透过所述红外光源发出的红外光的表面1002上陈积的污垢，手指1004表面的污垢都不会被图像传感器1006获取。由于在放置手指的可透过所述红外光源发出的红外光的表面1002的水迹或积水都是透明的，这些在放置手指的可透过所述红外光源发出的红外光的表面1002的水迹或积水都不会被图像传感器1006获取或造成手指静脉图像的失真，所以不会导致手指静脉图像采集装置100失灵。此外，由于所述的手指静脉图像采集装置100的图像成像面在手指的上方，避免了其它光源如阳光，或其它照明光源对手指静脉图像的采集产生的干扰。所以获得的手指静脉图像不会受到外界光源的干扰，图像的质量高，因而可以提高用户身份验证的准确率。
如图1A和图1B所示，由于从手指静脉图像采集装置的外壳1003底仓到手指静脉图像采集装置的外壳1003顶仓是一条自下而上的光路，为了产生较大的手指静脉图像，所述图像传感器1006与放置在可透过所述红外光源发出的红外光的表面1002上的手指1004要有一定的距离。这样可能导致手指静脉图像采集装置的外壳1003变高。为了进一步降低手指静脉图像采集装置的外壳1003的高度，下面描述了一些带有光学反射器的手指静脉图像采集装置102和104。这些手指静脉图像采集装置102和104可以通过光学反射器将自下而上的光路反射成从前到后，从左到右，或从右到左的光路，以降低手指静脉图像采集装置102和104的高度。
在另一方面，本发明涉及一种手指静脉图像采集装置102。所述手指静脉图像采集装置102包括：
至少一个用于获取一个使用者的至少一个手指1024静脉图像的图像传感器1026，一个 设置于手指静脉图像采集装置底部的红外光源1021和一个位于图像传感器1026和红外光源1021之间的光学反射器1028。其中所述的图像传感器1026沿从后往前方向面对使用者，用于采集位于手指1024上方的手指静脉图像成像面10251的图像。所述的光学反射器1028是用于将自下而上的手指静脉图像反射到从前到后的方向，并在手指1024上方的手指静脉图像成像面10251上产生手指静脉图像。所述的手指1024放置在所述的红外光源1021和图像传感器1026之间，红外光源1021发出的红外光向上照射到所述的手指1024，自下而上的手指静脉图像经所述的光学反射器1028反射到从前到后的方向并在手指上方的手指静脉图像成像面10251上产生手指静脉图像，由图像传感器1026获取所述手指静脉图像。
在某些实施例中，如图2A和图2B所示，所述的光学反射器1028是一个反射镜10281。在另一些实施例中，如图2C和图2D所示，所述的光学反射器1028是一个三棱镜10282。在又一些实施例中，所述的光学反射器1028可以是其它任何光学反射或折射器件。
在某些实施例中，所述红外光源1021包含多个红外发光二极管(LED)，多个红外灯泡，或任何红外发光器件，所述多个红外发光二极管，多个红外灯泡，或红外发光器件按照一到多列和一到多行排列。如图2A和图2B所示，所述红外光源1021包含至少包含三个红外发光二极管：第一红外发光二极管10211，第二红外发光二极管10212，和第三红外发光二极管10213.这三个红外发光二极管10211，10212和10213形成了一列红外发光源1021。在某些实施例中，红外发光源1021可能包含多行和多列红外发光二极管，红外灯泡或其它任何红外发光器件。其它列的红外发光源1021没有在图2A和图2B中显示。这样多列和多行的红外发光源1021可以提供很强，并且非常均匀的红外光。这种红外光有很强的穿透手指的能力，可以产生较大尺寸，更清晰的手指静脉图像。
在某些实施例中，所述的手指静脉图像采集装置102还包括一个用来放置手指1024的可透过所述红外光源发出的红外光的表面1022。这个放置手指1024的可透过所述红外光源发出的红外光的表面1022可以让用户将手指放在上面，这样在固定位置产生的手指静脉图像更稳定，不会产生由于手指1024上下移动而造成的手指静脉图像失真。
在某些实施例中，所述的手指静脉图像采集装置102还可以包含一个镜头1025。所述镜头1025设置在手指1024和图像传感器1026之间。所述镜头1025聚焦在放置手指1024的可透过所述红外光源发出的红外光的表面1022上产生的手指静脉图像。结合使用镜头1025和放置手指1024的可透过所述红外光源发出的红外光的表面1022，所述的手指静脉图像采集装置102可以获取非常一致，高质量的手指静脉图像。这样高质量的手指静脉图像可以进一步提高手指静脉图像采集装置102的用户身份验证的准确性和可靠性。
在某些实施例中，所述的手指静脉图像采集装置102还包括一个红外带通滤光片1027。所述红外带通滤光片1027设置于所述镜头1025和图像传感器1026之间。所述红外带通滤光片1027仅允许红外光通过，消除了除红外光以外其它光线的干扰，因而也提高了所获取的手指静脉图像的质量。
在某些实施例中，如图2B和图2D所示，所述的手指静脉图像采集装置102还包括一个手指静脉图像采集装置的外壳1023。所述的外壳1023包含一个顶仓和一个底仓。所述的外壳1023的顶仓用于放置图像传感器1026，镜头1025和红外带通滤光片1027。所述的外壳1023的底仓用于放置红外光源1021。所述手指静脉图像采集装置外壳1023的底仓的上表面构成所述的放置手指的可透过所述红外光源发出的红外光的表面1022。位于底仓的红外光源1021通过所述的放置手指的可透过所述红外光源发出的红外光的表面1022自下而上辐射红外光，并产生所述手指静脉图像。所述手指静脉图像采集装置外壳1023的顶仓的下表面10231是由可透过所述红外光源发出的红外光的材料构成用于将产生的手指静脉图像传入顶仓，以便通过镜头1025的聚焦，通过红外带通滤光片1027滤掉红外以外各种光线的干扰，由图像传感器1026获取相应的手指静脉图像。
在又一方面，如图3A到图3H所示，本发明涉及一种手指静脉图像采集装置104。所述的手指静脉图像采集装置104包括：至少一个用于获取一个使用者的至少一个手指1044静脉图像的图像传感器1046，一个设置于手指静脉图像采集装置104底部的红外光源1041和一个位于图像传感器1046和红外光源1041之间的光学反射器1048。在一个实施例中，所述的图像传感器1046设置于手指静脉图像采集装置104的顶部的右侧，从右向左面向所述手指静脉图像采集装置104的中心，所述的光学反射器1048是用于将自下而上的手指静脉图像反射到从左到右的方向，并在手指1044上方的手指静脉图像成像面10451上产生手指静脉图像。在另一实施例中，所述的图像传感器设置于手指静脉图像采集装置104的顶部的左侧，从左向右面向所述手指静脉图像采集装置104的中心，所述的光学反射器1048是用于将自下而上的手指静脉图像反射到从右到左的方向，并在手指1044上方的手指静脉图像成像面10451上产生手指静脉图像。所述的手指1046放置在所述的红外光源1041和图像传感器1046之间，红外光源1041发出的红外光向上照射到所述的手指1044，自下而上的手指静脉图像经所述的光学反射器1048反射到从左到右的方向，或从右到左的方向，并在手指1046上方的手指静脉图像成像面10451上产生手指静脉图像，由图像传感器1046获取所述手指静脉图像。
在某些实施例中，如图3A，图3B，图3C和图3D所示，所述的光学反射器1048是一个反射镜10481。在另一些实施例中，如图3E，图3F，图3G和图3H所示，所述的光学反射器1048是一个三棱镜10482。在又一些实施例中，所述的光学反射器1048可以是其它任何光学反射 或折射器件。
在某些实施例中，所述红外光源1041包含多个红外发光二极管(LED)，多个红外灯泡，或任何红外发光器件，所述多个红外发光二极管，多个红外灯泡，或红外发光器件按照一到多列和一到多行排列。如图3A，图3C，图3E和图3G所示，所述红外光源1041包含至少包含三个红外发光二极管：第一红外发光二极管10411，第二红外发光二极管10412，和第三红外发光二极管10413。如图3B，图3D，图3F和图3H所示，所述红外光源1041包含至少包含三个红外发光二极管：第三红外发光二极管10413，第四红外发光二极管10414，和第五红外发光二极管10415。所述红外光源1041实际上是一个三行三列的红外发光二极管矩阵。在某些实施例中，红外发光源1041可能包含多行和多列红外发光二极管，红外灯泡或其它任何红外发光器件。这样多列和多行的红外发光源1041可以提供很强，并且非常均匀的红外光。这种红外光有很强的穿透手指的能力，可以产生较大尺寸，更清晰的手指静脉图像。
在某些实施例中，所述的手指静脉图像采集装置104还包括一个用来放置手指1044的可透过所述红外光源发出的红外光的表面1042。这个放置手指1044的可透过所述红外光源发出的红外光的表面1042可以让用户将手指放在上面，这样在固定位置产生的手指静脉图像更稳定，不会产生由于手指1044上下移动而造成的手指静脉图像失真。
在某些实施例中，所述的手指静脉图像采集装置104还可以包含一个镜头1045。所述镜头1045设置在手指1044和图像传感器1046之间。所述镜头1045聚焦在放置手指1044的可透过所述红外光源发出的红外光的表面1042上产生的手指静脉图像。结合使用镜头1045和放置手指1044的可透过所述红外光源发出的红外光的表面1042，所述的手指静脉图像采集装置104可以获取非常一致，高质量的手指静脉图像。这样高质量的手指静脉图像可以进一步提高手指静脉图像采集装置104的用户身份验证的准确性和可靠性。
在某些实施例中，所述的手指静脉图像采集装置104还包括一个红外带通滤光片1047。所述红外带通滤光片1047设置于所述镜头1045和图像传感器1046之间。所述红外带通滤光片1047仅允许红外光通过，消除了除红外光以外其它光线的干扰，因而也提高了所获取的手指静脉图像的质量。
在某些实施例中，如图3C，图3D，图3G和图3H所示，所述的手指静脉图像采集装置104还包括一个手指静脉图像采集装置的外壳1043。所述的外壳1043包含一个顶仓和一个底仓。所述的外壳1043的顶仓用于放置图像传感器1046，镜头1045和红外带通滤光片1047。所述的外壳1043的底仓用于放置红外光源1041。所述手指静脉图像采集装置外壳1043的底仓的上表面构成所述的放置手指的可透过所述红外光源发出的红外光的表面1042。位于底仓的 红外光源1041通过所述的放置手指的可透过所述红外光源发出的红外光的表面1042自下而上辐射红外光，并产生所述手指静脉图像。所述手指静脉图像采集装置外壳1043的顶仓的下表面10431是由可透过所述红外光源发出的红外光的材料构成用于将产生的手指静脉图像传入顶仓，以便通过镜头1045的聚焦，通过红外带通滤光片1047滤掉红外以外各种光线的干扰，由图像传感器1046获取相应的手指静脉图像。
上述对本发明的各种示例性实施例的描述仅仅用来演示和陈述本发明的部分内容，上述描述并不代表穷尽性，也不能将本发明局限于所揭示的具体或精确形式。根据上述的描述和演示，许多修改和变化是完全可能的。
选择和描述实施例以便解释本发明的原理和其实际应用，以便使得所属领域的技术人员能够利用本发明和各种实施例并且伴以适合于所预期的特定用途的各种修改。在不脱离本发明的精神和范围的情况下，本发明所涉及的领域的技术人员将清楚替代实施例。因此，本发明的范围由所附权利要求书、前述描述和其中所描述的示例性实施例以及附图界定。

Claims (20)

  1. 一种手指静脉图像采集装置，包括：
    至少一个用于获取一个使用者的至少一个手指静脉图像的图像传感器，其中所述的图像传感器用于采集位于手指上方的手指静脉图像成像面的图像；和
    一个设置于手指静脉图像采集装置底部的红外光源，
    所述的手指放置在所述的红外光源和图像传感器之间，红外光源发出的红外光向上照射到所述的手指，在手指上方的手指静脉图像成像面上产生手指静脉图像，所述的图像传感器从手指静脉图像成像面获取所述手指静脉图像。
  2. 根据权利要求1所述的手指静脉图像采集装置，所述红外光源包含多个红外发光二极管(LED)，多个红外灯泡，或任何红外发光器件，所述多个红外发光二极管，多个红外灯泡，或红外发光器件按照一到多列和一到多行排列。
  3. 根据权利要求1所述的手指静脉图像采集装置，进一步包括一个位于手指和图像传感器之间的镜头，和一个位于所述镜头和图像传感器之间可透过所述红外光源发出的红外光的红外带通滤光片，所述镜头和所述红外带通滤光片用于提高所获取的手指静脉图像的质量。
  4. 根据权利要求3所述的手指静脉图像采集装置，进一步包括一个用来放置手指的可透过所述红外光源发出的红外光的表面。
  5. 根据权利要求4所述的手指静脉图像采集装置，进一步包括手指静脉图像采集装置的外壳，所述的外壳包含一个放置图像传感器，镜头和红外带通滤光片的顶仓和一个放置红外光源的底仓。
  6. 根据权利要求5所述的手指静脉图像采集装置，所述的外壳的顶仓的下表面是由可透过所述红外光源发出的红外光的材料构成，和所述的外壳的底仓的上表面构成所述的放置手指的可透过上述红外光源发出的红外光表面。
  7. 一种手指静脉图像采集装置，包括：
    至少一个用于获取一个使用者的至少一个手指静脉图像的图像传感器，其中所述的图像传感器从后向前面对使用者，用于采集位于手指上方的手指静脉图像成像面的图像；
    一个设置于手指静脉图像采集装置底部的红外光源；和
    一个位于图像传感器和红外光源之间的光学反射器，所述的光学反射器是用于将自下而上的手指静脉图像反射到从前到后的方向，并在手指上方的手指静脉图像成像面上产生手指静脉图像，
    所述的手指放置在所述的红外光源和图像传感器之间，红外光源发出的红外光向上照射到所述的手指，自下而上的手指静脉图像经所述的光学反射器反射到从前到后的方向并在手指上方的手指静脉图像成像面上产生手指静脉图像，由图像传感器获取所述手指静脉图像。
  8. 根据权利要求7所述的手指静脉图像采集装置，所述红外光源包含多个红外发光二极 管(LED)，多个红外灯泡，或任何红外发光器件，所述多个红外发光二极管，多个红外灯泡，或红外发光器件按照一到多列和一到多行排列。
  9. 根据权利要求7所述的手指静脉图像采集装置，所述的光学反射器包括，一种反射镜，一种折射镜，一种三棱镜，一个任何其它光学折射或反射器件。
  10. 根据权利要求7所述的手指静脉图像采集装置，进一步包括一个位于手指和图像传感器之间的镜头，和一个位于所述镜头和图像传感器之间可透过所述红外光源发出的红外光的红外带通滤光片，所述镜头和所述红外带通滤光片用于提高所获取的手指静脉图像的质量。
  11. 根据权利要求10所述的手指静脉图像采集装置，进一步包括一个用来放置手指的可透过所述红外光源发出的红外光的表面。
  12. 根据权利要求11所述的手指静脉图像采集装置，进一步包括手指静脉图像采集装置的外壳，所述的外壳包含一个放置图像传感器，镜头和红外带通滤光片的顶仓和一个放置红外光源的底仓。
  13. 根据权利要求12所述的手指静脉图像采集装置，所述的外壳的顶仓的下表面是由可透过所述红外光源发出的红外光的材料构成，和所述的外壳的底仓的上表面构成所述的放置手指的可透过所述红外光源发出的红外光的表面。
  14. 一种手指静脉图像采集装置，包括：
    至少一个用于获取一个使用者的至少一个手指静脉图像的图像传感器，其中所述的图像传感器设置于手指静脉图像采集装置的顶部的右侧，从右向左面向所述手指静脉图像采集装置的中心，用于采集位于手指上方的手指静脉图像成像面的图像；
    一个设置于手指静脉图像采集装置底部的红外光源；和
    一个位于图像传感器和红外光源之间的光学反射器，所述的光学反射器是用于将自下而上的手指静脉图像反射到从左到右的方向，并在手指上方的手指静脉图像成像面上产生手指静脉图像，
    所述的手指放置在所述的红外光源和图像传感器之间，红外光源发出的红外光向上照射到所述的手指，自下而上的手指静脉图像经所述的光学反射器反射到从左到右的方向并在手指上方的手指静脉图像成像面上产生手指静脉图像，由图像传感器获取所述手指静脉图像。
  15. 根据权利要求14所述的手指静脉图像采集装置，所述红外光源包含多个红外发光二极管(LED)，多个红外灯泡，或任何红外发光器件，所述多个红外发光二极管，多个红外灯泡，或红外发光器件按照一到多列和一到多行排列。
  16. 根据权利要求14所述的手指静脉图像采集装置，其中所述的图像传感器设置于手指静脉图像采集装置的顶部的左侧，从左向右面向所述手指静脉图像采集装置的中心。
  17. 根据权利要求14所述的手指静脉图像采集装置，所述的光学反射器包括，一种反射镜，一种折射镜，一种三棱镜，一个任何其它光学折射或反射器件。
  18. 根据权利要求14所述的手指静脉图像采集装置，进一步包括一个位于手指和图像传感器之间的镜头，和一个位于所述镜头和图像传感器之间可透过所述红外光源发出的红外光的红外带通滤光片，所述镜头和所述红外带通滤光片用于提高所获取的手指静脉图像的质量。
  19. 根据权利要求18所述的手指静脉图像采集装置，进一步包括手指静脉图像采集装置的外壳，所述的外壳包含一个放置图像传感器，镜头和红外带通滤光片的顶仓和一个放置红外光源的底仓。
  20. 根据权利要求19所述的手指静脉图像采集装置，所述的外壳的顶仓的下表面是由可透过所述红外光源发出的红外光的材料构成，和所述的外壳的底仓的上表面构成所述的放置手指的可透过所述红外光源发出的红外光的表面。
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