CN201191320Y - Prism having optical finger print sensor - Google Patents
Prism having optical finger print sensor Download PDFInfo
- Publication number
- CN201191320Y CN201191320Y CNU2008200863190U CN200820086319U CN201191320Y CN 201191320 Y CN201191320 Y CN 201191320Y CN U2008200863190 U CNU2008200863190 U CN U2008200863190U CN 200820086319 U CN200820086319 U CN 200820086319U CN 201191320 Y CN201191320 Y CN 201191320Y
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- China
- Prior art keywords
- prism
- optical fingerprint
- fingerprint sensor
- light source
- face
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model relates to a triple prism of an optical fingerprint sensor, which relates to the field of optical fingerprint sensors. The triple prism of the optical fingerprint sensor comprises a collecting surface, a reading surface, a light source surface and two lateral surfaces, and is characterized in that the two lateral surfaces of the triple prism are coated with black coating layers. The triple prism of the optical fingerprint sensor has novel and practical overall design, is beautiful, and largely reduces the error rate of the optical fingerprint sensors during the process of collecting fingerprint data.
Description
Technical field:
The utility model relates to a kind of prism of optical fingerprint sensor, relates to the optical fingerprint sensor field.
Background technology:
As everyone knows, people's fingerprint has uniqueness and immutableness, also this reason just, and in judicial work, fingerprint is differentiated and be can be used as a compellent evidence.Now, the uniqueness of fingerprint and immutableness begin among gradually the field that is used in numerous need protection secret or authentications, to play the effect of identification.Optical fingerprint sensor is widely used fingerprint collecting or a reading device in the existing fingerprint recognition system, it can pass through optical sensor, with the fingerprint imaging on the finger, then finger print information is transferred in the database of coupled computer system and in the database canned data proofread identity with the identification fingerprint owner.Optical fingerprint sensor generally is made of casing assembly, prism and light source assembly, and prism is according to having or not background surfaces to be divided into dark background prism and bright background prism.Current optical fingerprint sensor does not participate in imaging because it is generally acknowledged two sides of prism, so do not consider if the face of having powerful connections then only is provided with black coating on the part of background surfaces integral body or background surfaces integral body and surface of light source on light path.But in actual applications, find that parasitic light forms refraction and the image that finally forms is disturbed in reflection on reading face in two sides by prism easily, influence the contrast and the sharpness of image, finally cause the error of image, when fingerprint contrasts, increase and refuse sincere and accuracy of system identification.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned defective of the prior art, a kind of prism of optical fingerprint sensor is provided, this prism general idea Nover practical, elegant in appearance, greatly reduce optical fingerprint sensor causes error in gathering finger print data probability.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: the prism of this optical fingerprint sensor, comprise collection face, reading face, surface of light source and two sides, and it is characterized in that: two sides of described prism are provided with black coating.
The utility model also is provided with background surfaces.
Background surfaces integral body of the present utility model is provided with black coating.
A background surfaces of the present utility model part whole and surface of light source is provided with black coating.
The utility model compared with prior art, have the following advantages: two sides of prism are provided with black coating, stopped the possibility that parasitic light forms refraction and reflects by two sides fully, the parasitic light of avoiding is to the interference of the final image that forms on reading face, the contrast and the sharpness of image have been guaranteed, when fingerprint contrasts, reduced to refuse sincere, increased accuracy of system identification.
Rate.
Description of drawings:
Fig. 1 is structural representation of the present utility model (face of having powerful connections).
Fig. 2 is structural representation of the present utility model (a no background surfaces).
Embodiment:
Embodiment one:
Referring to Fig. 1, the utility model comprises collection face 1, reading face 2, surface of light source 3, background surfaces 4 and two sides 5.
The prism of optical fingerprint sensor generally has five or six faces, and the collection face on it 1 is exactly the face that contacts with finger, is used to gather finger print information; Reading face 2 is connected on the lens subassembly of optical fingerprint sensor and final sum sensor line plate connects indirectly, is used to transmit finger print information; Surface of light source 3 is connected on the light source of optical fingerprint sensor, is used to amplify light source and provides enough light to collection face.
The prism of optical fingerprint sensor is according to having or not background surfaces to be divided into dark background prism and bright background prism, and the present embodiment face of having powerful connections belongs to the dark background prism.
In the present embodiment, background surfaces 4 and two sides 5 all are provided with black coating.
Embodiment two:
Referring to Fig. 2, comprise collection face 1, reading face 2, surface of light source 3 and two sides 5.
The prism of optical fingerprint sensor generally has five or six faces, and the collection face on it 1 is exactly the face that contacts with finger, is used to gather finger print information; Reading face 2 is connected on the lens subassembly of optical fingerprint sensor and final sum sensor line plate connects indirectly, is used to transmit finger print information; Surface of light source 3 is connected on the light source of optical fingerprint sensor, is used to amplify light source and provides enough light to collection face.
The prism of optical fingerprint sensor is according to having or not background surfaces to be divided into dark background prism and bright background prism, and present embodiment does not have background surfaces, belongs to bright background prism.
In the present embodiment, two sides 5 all are provided with black coating.
Claims (4)
1, a kind of prism of optical fingerprint sensor comprises collection face, reading face, surface of light source and two sides, it is characterized in that: two sides of described prism are provided with black coating.
2, the prism of optical fingerprint sensor according to claim 1 is characterized in that: this prism also is provided with background surfaces.
3, the prism of optical fingerprint sensor according to claim 2 is characterized in that: described background surfaces integral body is provided with black coating.
4, the prism of optical fingerprint sensor according to claim 2 is characterized in that: a described background surfaces part whole and surface of light source is provided with black coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200863190U CN201191320Y (en) | 2008-04-25 | 2008-04-25 | Prism having optical finger print sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200863190U CN201191320Y (en) | 2008-04-25 | 2008-04-25 | Prism having optical finger print sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201191320Y true CN201191320Y (en) | 2009-02-04 |
Family
ID=40335483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200863190U Expired - Lifetime CN201191320Y (en) | 2008-04-25 | 2008-04-25 | Prism having optical finger print sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201191320Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426648A (en) * | 2011-11-01 | 2012-04-25 | 长春方圆光电技术有限责任公司 | Finger and palm print instrument used for collection of soaked finger and palm prints |
-
2008
- 2008-04-25 CN CNU2008200863190U patent/CN201191320Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426648A (en) * | 2011-11-01 | 2012-04-25 | 长春方圆光电技术有限责任公司 | Finger and palm print instrument used for collection of soaked finger and palm prints |
| CN102426648B (en) * | 2011-11-01 | 2013-09-18 | 长春方圆光电技术有限责任公司 | Finger and palm print instrument used for collection of soaked finger and palm prints |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU ZHI'AN TECHNOLOGIES CO., LTD. Free format text: FORMER NAME: HANGZHOU ZHIAN TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Two 310000 Hangzhou Road, Zhejiang province Xihu District Xiyuan No. 9 Building 1 layer 6 Patentee after: HANGZHOU ZHIAN TECHNOLOGY CO., LTD. Address before: Hangzhou City, Zhejiang province 310013 Tianmushan Road No. 160 International Garden, Lau 10F/A block B Patentee before: HANGZHOU ZHIAN TECHNOLOGY CO., LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090204 |