CN202758369U - Optical fingerprint acquisition head based on diffuse reflection principle - Google Patents
Optical fingerprint acquisition head based on diffuse reflection principle Download PDFInfo
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- CN202758369U CN202758369U CN 201220168193 CN201220168193U CN202758369U CN 202758369 U CN202758369 U CN 202758369U CN 201220168193 CN201220168193 CN 201220168193 CN 201220168193 U CN201220168193 U CN 201220168193U CN 202758369 U CN202758369 U CN 202758369U
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Abstract
The utility model relates to an optical fingerprint acquisition head based on the diffuse reflection technology. The optical fingerprint acquisition head includes a housing. An optical sensor, a microlens, an acquisition prism and an infrared light source are arranged on an optical path in the housing in order. The optical fingerprint acquisition head is characterized in that the acquisition prism is a trapezoid prism; the background waist face of the acquisition prism is an optical black face; the infrared light source is a spot light source and is arranged on the upper bottom face of the trapezoid prism; and the upper bottom face is a frosted face. The optical fingerprint acquisition head based on the diffuse reflection technology mainly solves the problems of poor dry fingerprint adaptability and poor image acquisition effect in external hard light existing in a conventional total reflection optical fingerprint acquisition head, and the automatic acquisition problem which exists in a diffuse refection optical fingerprint acquisition head and is caused by external infrared ray interference in external natural light or in a high temperature environment. The optical fingerprint acquisition head based on the diffuse reflection principle can be applied to a lock product or an information acquisition system based on fingerprint management.
Description
Technical field
The present invention relates to a kind of Optical Fingerprint Gathering Head, particularly a kind of Optical Fingerprint Gathering Head based on the diffuse reflection principle.
Background technology
Existing Optical Fingerprint Gathering Head, relatively be typically total reflection image optics fingerprint collecting head technology such as the disclosed technology of ZL201010217947.X of adopting, it is by prism, light guide plate, lens combination, CMOS plate and rectangular plastic shell component form, rectangular plastic shell component upper end assembling prism, light source board, the in-built lens combination in rectangular plastic shell component stage casing, rectangular plastic shell component assembling CMOS plate, light source board is parallel with the one side of prism fingerprint collecting face vicinity, this face is the frosted hair side, the light source of the type collection head is to adopt typical planar light source, the original image characteristics that become are that background is white, and streakline is grey black.But, through inventor's discovery that studies for a long period of time, total reflection image optics fingerprint collecting head is relatively poor to dried fingerprint collecting effect, in order to address this problem, stick the fingerprint mantle at the fingerprint collecting face, but the fingerprint mantle is easy to damage and serviceable life is shorter, maintenance cost is high, when the outside natural light of simultaneously directive collection window is stronger, sunlight such as summer, collection head to the open air use is just influential, causes fingerprint gate lock sometimes can not normally gather checking, particularly is very easy to distortion for the finger print information of doing finger.These problems have greatly restricted the popularization of finger print information collection product application market.
Summary of the invention
The present invention is for solving existing ATR Optical fingerprint collecting head to dried fingerprint bad adaptability and externally gathering the poor and diffuse reflection optics fingerprint collecting head of the image effect automatic acquisition problems that externally outside ultrared interference causes under natural light or the hot environment under the high light, developed a kind of Optical Fingerprint Gathering Head based on the diffuse reflection principle, comprise housing, be disposed with optical sensor, lenticule, Collection prism and infrared light sources on the light path in the described housing; It is characterized in that, described Collection prism is Dove prism, and the background central plane of described Collection prism is optics black flour, and described infrared light sources is pointolite and the upper bottom surface position that is arranged on described Dove prism, and described upper bottom surface is frosting.
Because the background central plane of described Collection prism is optics black flour, this optics black matrix face can absorb the light that the extraneous light that shines from collection face and internal light source spill, thereby guarantee that image background has been holomelanocratic, has extraordinary adaptability to dried fingerprint imaging.
Secondly be pointolite and be arranged on the upper bottom surface of described Dove prism owing to described infrared light sources, thereby can form the diffuse reflection imaging, and because described upper bottom surface is frosting, thereby the light that incides prism is evenly distributed.
Further technical scheme can also be to be provided with field lens between described Collection prism and described lenticule.Described like this field lens cooperates the light signal of more accurately adjusting light path with described lenticule, and wherein said field lens can be adjusted the focal length of light path significantly, and the focal length that described lenticule can trickle adjustment light path, thereby reaches accurately, effect accurately.
Further technical scheme can also be that described infrared light sources is that the wavelength X scope of pointolite is 800nm～1000nm.Adopt the pointolite product of this wavelength coverage to be not only the most ripe product for civilian use of technology and be that price is relatively cheap, suitable batch production.
Further technical scheme can also be, on described field lens or the described lenticule filter coating is set, and the infrared light that described filter coating permission wavelength X scope is 780nm～1100nm passes through.Like this can filtering external disturbance visible light.
Further technical scheme can also be, at the collection window peripheral position of described housing the electrostatic induction coil is set, and described electrostatic induction coil is connected with the controller electric signal.The actuating signal that can respond to like this live finger prevents from simulating the mistake input of fingerprint signal, the security that has improved product.
According to said structure, can form the optical finger print information acquisition head based on diffuse reflection optics principle, thereby not only can avoid reliably visible light in the external environment condition to misreading that the interference of finger print information causes, and to make image background be black substantially, crestal line and the valley line signal of finger are distinct, can identify exactly the fingerprint signal of doing finger thereby greatly improved the accuracy that gathers.
Because the present invention has These characteristics and advantage, can be applied in the lockset product or information acquisition system based on fingerprint management.
Description of drawings
Fig. 1 is the planar structure schematic diagram of using the described Collection prism of technical solution of the present invention;
Fig. 2 is the light channel structure schematic diagram of using the described Optical Fingerprint Gathering Head of technical solution of the present invention.
Embodiment
Below in conjunction with accompanying drawing the concrete structure of the described Optical Fingerprint Gathering Head of application technical solution of the present invention is made an explanation.
As depicted in figs. 1 and 2, fingerprint collecting head comprises housing 1, is disposed with optical sensor 2, lenticule 3, field lens 4, Collection prism 5 and infrared ray pointolite 6 on the light path in the described housing 1.Dotted line among Fig. 2 is ultrared path direction schematic diagram.
Wherein, an end of described housing 1 arranges the collection face 54 that gathers window 7 and described Collection prism 5 is set in described collection window 7 positions.
As shown in Figure 1, described Collection prism 5 is trapezoidal, and its upper bottom surface 51 arranges infrared ray pointolite 6 for frosting and in this position, and described infrared ray pointolite 6 forms diffuse light at described upper bottom surface 51.The wavelength X scope of described infrared ray pointolite is 800nm～1000nm.The bottom surface of described Collection prism 5 is described collection face 54, thereby is placed on it the finger print information that gathers finger 8 for finger 8.The background central plane 52 of described Collection prism 5 is optics black flour.And the central plane 53 corresponding with described background central plane 52 is transparent surfaces.
As shown in Figure 2, be provided with optical sensor 2 at described housing 1, be provided with lenticule 3 in the place ahead of described optical sensor 2, between described lenticule 3 and described Collection prism 5, be provided with again field lens 4.Wherein plate one deck filter coating at described lenticule 3 or field lens 4, be used for to filter visible light, only allow the wavelength X scope be that the Infrared of 780nm～1100nm is passed through.The material of described lenticule 3 and Collection prism 5 all is glass commonly used, according to different glass materials, suitably adjusts angle and position of optical element gets final product.
Further technical scheme can also be, at collection window 7 peripheral positions of described housing 1 electrostatic induction coil (not shown in FIG.) is set, and described electrostatic induction coil is connected with the controller electric signal.Because coil forms coupling capacitance with finger, live finger has blood flow, charged, therefore, when the close coil of live finger, coil can produce aanalogvoltage, can detect aanalogvoltage by the electrostatic induction chip, thereby know that having live finger to be pressed into gathers on the window, the actuating signal that can respond to like this live finger prevents from simulating the mistake input of fingerprint signal, the security that has improved product.
Claims (5)
1. based on the Optical Fingerprint Gathering Head of diffuse reflection principle, comprise housing, be disposed with optical sensor, lenticule, Collection prism and infrared light sources on the light path in the described housing; It is characterized in that, described Collection prism is Dove prism, and the background central plane of described Collection prism is optics black flour, and described infrared light sources is pointolite and the upper bottom surface position that is arranged on described Dove prism, and described upper bottom surface is frosting.
2. the Optical Fingerprint Gathering Head based on the diffuse reflection principle according to claim 1 is characterized in that, is provided with field lens between described Collection prism and described lenticule.
3. the Optical Fingerprint Gathering Head based on the diffuse reflection principle according to claim 2 is characterized in that, described infrared light sources is pointolite, and its wavelength X scope is 800nm～1000nm.
4. the Optical Fingerprint Gathering Head based on the diffuse reflection principle according to claim 2 is characterized in that, on described field lens or the described lenticule filter coating is set, and the infrared light that described filter coating permission wavelength X scope is 780nm～1100nm passes through.
5. according to claim 1,2,3 or 4 described Optical Fingerprint Gathering Heads based on the diffuse reflection principle, it is characterized in that, at the collection window peripheral position of described housing the electrostatic induction coil is set, described electrostatic induction coil is connected with the controller electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220168193 CN202758369U (en) | 2012-04-16 | 2012-04-16 | Optical fingerprint acquisition head based on diffuse reflection principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220168193 CN202758369U (en) | 2012-04-16 | 2012-04-16 | Optical fingerprint acquisition head based on diffuse reflection principle |
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| CN202758369U true CN202758369U (en) | 2013-02-27 |
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| CN 201220168193 Expired - Lifetime CN202758369U (en) | 2012-04-16 | 2012-04-16 | Optical fingerprint acquisition head based on diffuse reflection principle |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106067014A (en) * | 2016-07-13 | 2016-11-02 | 杭州指安科技股份有限公司 | Finger face structure is adopted in a kind of uniformity illumination |
| CN110991351A (en) * | 2016-01-31 | 2020-04-10 | 深圳市汇顶科技股份有限公司 | Optical sensor module under screen for sensing fingerprint on screen |
| WO2020243934A1 (en) * | 2019-06-05 | 2020-12-10 | 深圳市汇顶科技股份有限公司 | Optical image acquisition apparatus and electronic device |
| WO2020248809A1 (en) * | 2019-06-13 | 2020-12-17 | 神盾股份有限公司 | Under-display fingerprint sensing module and electronic apparatus |
| US10963671B2 (en) | 2015-06-18 | 2021-03-30 | Shenzhen GOODIX Technology Co., Ltd. | Multifunction fingerprint sensor having optical sensing capability |
| US11017068B2 (en) | 2015-06-18 | 2021-05-25 | Shenzhen GOODIX Technology Co., Ltd. | Optical sensing performance of under-screen optical sensor module for on-screen fingerprint sensing |
-
2012
- 2012-04-16 CN CN 201220168193 patent/CN202758369U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10963671B2 (en) | 2015-06-18 | 2021-03-30 | Shenzhen GOODIX Technology Co., Ltd. | Multifunction fingerprint sensor having optical sensing capability |
| US11017068B2 (en) | 2015-06-18 | 2021-05-25 | Shenzhen GOODIX Technology Co., Ltd. | Optical sensing performance of under-screen optical sensor module for on-screen fingerprint sensing |
| CN110991351A (en) * | 2016-01-31 | 2020-04-10 | 深圳市汇顶科技股份有限公司 | Optical sensor module under screen for sensing fingerprint on screen |
| CN110991351B (en) * | 2016-01-31 | 2020-12-01 | 深圳市汇顶科技股份有限公司 | Optical sensor module under screen for sensing fingerprint on screen |
| CN106067014A (en) * | 2016-07-13 | 2016-11-02 | 杭州指安科技股份有限公司 | Finger face structure is adopted in a kind of uniformity illumination |
| WO2020243934A1 (en) * | 2019-06-05 | 2020-12-10 | 深圳市汇顶科技股份有限公司 | Optical image acquisition apparatus and electronic device |
| WO2020248809A1 (en) * | 2019-06-13 | 2020-12-17 | 神盾股份有限公司 | Under-display fingerprint sensing module and electronic apparatus |
| TWI783230B (en) * | 2019-06-13 | 2022-11-11 | 神盾股份有限公司 | Under-screen fingerprint sensing module and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangdong Archie Hardware Co., Ltd. Assignor: Cao Guoji Contract record no.: 2013440000399 Denomination of utility model: Optical fingerprint acquisition head based on diffuse reflection principle Granted publication date: 20130227 License type: Exclusive License Record date: 20130802 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130227 |
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| CX01 | Expiry of patent term |