CN201600711U - Flat fingerprint collector - Google Patents
Flat fingerprint collector Download PDFInfo
- Publication number
- CN201600711U CN201600711U CN2010201007240U CN201020100724U CN201600711U CN 201600711 U CN201600711 U CN 201600711U CN 2010201007240 U CN2010201007240 U CN 2010201007240U CN 201020100724 U CN201020100724 U CN 201020100724U CN 201600711 U CN201600711 U CN 201600711U
- Authority
- CN
- China
- Prior art keywords
- prism
- lens
- fingerprint
- black cavity
- flat
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model discloses a flat fingerprint collector belonging to technical field of fingerprint image capturing and identifying, which comprises a collector shell, a prism that is arranged in the collector shell and has a right-angle trapezoidal longitudinal section, a lens and an image sensor. The lens and the image sensor are located at one side of the straight waist surface of the prism. The characteristics are as follows: the upper bottom surface of the prism is used as a fingerprint collecting surface; the inclined waist surface of the prism is a full reflective surface; the straight waist surface of the prism is an exit surface of the prism; the straight waist surface of the prism is adjacent to a black cavity, and the depth L of the black cavity is larger than 1/2 of the height of the prism; the other side of the black cavity is the lens and the image sensor; the image receiving surface of the lens is connected with the exit surface; the image receiving surface of the image sensor is located on an imaging surface of the lens, and the image sensor has a CMOS chip. The flat fingerprint collector with light weight, good definition has simple structure, convenient assembling and better mechanical strength due to removing of a reflector.
Description
Technical field
The utility model belongs to fingerprint image and catches the recognition technology field, is specifically related to little, the slim high-resolution fingerprint capturer of a kind of size.
Background technology
Fingerprint capturer is used to gather finger print information, be applicable to the gate inhibition, automobile, work attendance, on the access control apparatus such as computing machine, the optical type fingerprint capturer is that illumination is formed image to the fingerprint of putting prism fingerprint collecting face, and by reflecting to form on imageing sensor, initial optical type fingerprint capturer volume is big, can not be used for the restricted equipment of installing space uses, and can't adapt to the trend of minimum production in recent years, be flat fingerprint capturer by what the expert approved as accompanying drawing 1 for reducing a kind of slim fingerprint acquisition instrument of size, by prism 8, lens 5 and photoelectric detector or imageing sensor 7 are formed, the bottom surface of prism 8 is pitch-dark layer 9, oblique girdle plane is a reflective mirror 1, its light path is that finger covers on the prism, to pitch-dark layer, pitch-dark layer is sent to photoelectric detector 7 by the reflex to oblique girdle plane 1 and scioptics 5 and reflecting surface 6 of prism to the light of its cover part again by prismatic reflection.Pitch-dark can be improved certain image definition and can realize miniaturization, but prism is coated with black flour technology, and production efficiency and cost are increased.Simultaneously, prism is generally glass material, and it is limited to carry out improving the degree of deciding contrast after blacking is handled in the above.
Summary of the invention
In order to overcome deficiency of the prior art, the purpose of this utility model is to provide a kind of lightweight, sharpness is good, physical strength is stronger, simple in structure, produce flat fingerprint capturer easy to assembly.
For achieving the above object, the utility model adopts following technical scheme:
A kind of flat fingerprint capturer, comprising the collector housing and placing its interior longitudinal section is the prism of right-angled trapezium, lens and imageing sensor, lens and imageing sensor are positioned at prism straight middle surface one side, the upper bottom surface that it is characterized in that prism is as the fingerprint collecting face, the prism oblique girdle plane is the total reflection minute surface, the prism straight middle surface is the prism exit facet, prism straight middle surface neighbour one black cavity, the degree of depth L of black cavity is greater than 1/2 of prism height, the opposite side of black cavity is lens and image sensor lenses, the image receiving plane and the exit facet of lens join, and the image receiving plane of imageing sensor is positioned on the imaging surface of lens, and described imageing sensor is the CMOS chip.Image by prism and lens after directly imaging on imageing sensor.
Further, lens place the sleeve of length travel relatively, and lens are embedded in the lens sleeve.So the focal length of design lens is adjustable from the outside, has improved convenience.
Preferred scheme is that the black cavity is the part of collector housing for ease of processing, scribbles a section of mute light black for the inwall of collector housing.
Several pits or projection are laid in the inboard of described black cavity.Perhaps be usually used in strengthening shape or the structure that light absorbs in corrugated surface or the prior art.
The bottom surface both sides of prism right-angled trapezium are fitted with led light source.Help improving intensity of illumination, improve image quality.
Flat fingerprint capturer compared to existing technology, its beneficial effect is:
(1) removed catoptron, made that the fingerprint capturer structure is simpler, easy to assembly, on the cost and technology on more controlled.And image by prism and lens after, directly imaging on imageing sensor has reduced original structure and has come the issuable deviation of imaging by catoptron.
(2) prism is save and is coated with black flour technology, makes its manufacturing more simple;
(3) can reduce the length dimension of prism, in experiment, reach same effect.The black cavity can shorten 2/3 of former pitch-dark layer length, reduces the fingerprint capturer overall dimensions compared to existing technology, and has changed light path simultaneously, makes the collector microminiaturization, and the microminiaturization of collector can strengthen its physical strength.
(4) absorb light by the black cavity, can obtain the image higher, help improving image quality, guarantee the sharpness and the integrality of imaging than traditional fingerprint capturer contrast.
(5) focal length of lens lens is adjustable from the outside, has improved convenience.
Figure of description
Fig. 1 is the flat fingerprint capturer structural representation of prior art.
Fig. 2 is the flat fingerprint capturer structural representation of the utility model.
Embodiment
Come the utility model is further specified below in conjunction with specific embodiment, but the utility model is not limited to these embodiments.One skilled in the art would recognize that the utility model contained in claims scope all alternativess, improvement project and the equivalents that may comprise.
Embodiment 1
A kind of as shown in Figure 2 novel fingerprint capturer is made of prism 8, lens 5, cmos imageing sensor 7 and black cavity L, and all is installed in the plastic box body.The longitudinal section of prism 8 is that right-angled trapezium, lens and imageing sensor are positioned at prism straight middle surface one side, oblique girdle plane is shaped on mirror surface 1, the upper bottom surface of prism is as fingerprint collecting face 2, prism straight middle surface neighbour one black cavity, the degree of depth L of black cavity is configured between the straight middle surface and lens 5 of prism greater than 1/2 of prism height.The opposite side that is the black cavity is lens 5 and imageing sensor.The device that does not have other in the middle of lens 5 and the fingerprint sensor.
But lens 5 place the sleeve 4 of an opposite shell 1 displacement, and lens are embedded in the lens sleeve 4, and the top of lens sleeve is exposed at outside the plastic box body.
In actual application, the people is placed on finger on the prism and carries out image acquisition constantly, and finger covers on the prism, and the light of its cover part reflects by prism, and scioptics directly are sent to cmos sensor.The light that other fingers do not cover part is absorbed by the black cavity after by prismatic reflection.
In actual applications, the black cavity is a part that belongs to fingerprint head capsule body structure, and inwall is mute light black, and the big more light assimilation effect of cavity depth L is good more, but that overall volume also can become is big.The cavity of employing out-of-shape (as corrugated surface) and the degree of depth just can get greater than 1/2H (H is a prism height) and effectively absorb light, obtain than conventional fingerprint collector better pictures contrast, thereby obtain better fingerprint image.
The utility model cmos imageing sensor is an image acquisition quantization sensing device, optical axis with the sensor array centrally aligned optical system of optics cmos imageing sensor, adjust lens sleeve itself and cmos target surface are overlapped, the cmos imageing sensor can be selected 7649 of OmniVision company.
Lens have been installed the lens sleeve that can move from the fingerprint capturer outside in the present embodiment, can carry out the adjustment of focal length easily after whole fingerprint installation, thereby have increased the convenience of production run.
The utility model is not limited to these embodiments, any on the present embodiment essence spirit improvement or substitute, still belong to the utility model claim scope required for protection.
Claims (5)
1. flat fingerprint capturer, comprising the collector housing and placing its interior longitudinal section is the prism of right-angled trapezium, lens and imageing sensor, lens and imageing sensor are positioned at prism straight middle surface one side, the upper bottom surface that it is characterized in that prism is as the fingerprint collecting face, the prism oblique girdle plane is the total reflection minute surface, the prism straight middle surface is the prism exit facet, prism straight middle surface neighbour one black cavity, the degree of depth L of black cavity is greater than 1/2 of prism height, the opposite side of black cavity is lens and image sensor lenses, the image receiving plane and the exit facet of lens join, and the image receiving plane of imageing sensor is positioned on the imaging surface of lens, and described imageing sensor is the CMOS chip.
2. flat according to claim 1 fingerprint capturer is characterized in that lens place the sleeve of length travel relatively, and lens are embedded in the lens sleeve.
3. flat according to claim 1 fingerprint capturer is characterized in that the black cavity is the part of collector housing, scribbles a section of mute light black for the inwall of collector housing.
4. as flat fingerprint capturer as described in the claim 3, it is characterized in that several pits or projection are laid in the inboard of described black cavity.
5. as flat fingerprint capturer as described in the claim 4, it is characterized in that the bottom surface both sides of prism right-angled trapezium are fitted with led light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201007240U CN201600711U (en) | 2010-01-20 | 2010-01-20 | Flat fingerprint collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201007240U CN201600711U (en) | 2010-01-20 | 2010-01-20 | Flat fingerprint collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201600711U true CN201600711U (en) | 2010-10-06 |
Family
ID=42811774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201007240U Expired - Lifetime CN201600711U (en) | 2010-01-20 | 2010-01-20 | Flat fingerprint collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201600711U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632128A (en) * | 2012-08-24 | 2014-03-12 | 成都方程式电子有限公司 | Flat fingerprint gatherer |
-
2010
- 2010-01-20 CN CN2010201007240U patent/CN201600711U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632128A (en) * | 2012-08-24 | 2014-03-12 | 成都方程式电子有限公司 | Flat fingerprint gatherer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI604244B (en) | Optical imaging lens and electronic device using the same | |
| TWI431312B (en) | Optical image capturing lens assembly | |
| TWI475247B (en) | An optical imaging lens and an electronic device to which the optical imaging lens is applied | |
| TW201317659A (en) | Optical imaging lens and electronic device using the same | |
| TWI592681B (en) | Optical imaging lens and the electronic device using the lens | |
| CN109685034B (en) | Fingerprint identification module and display device | |
| TWI472794B (en) | Optical system | |
| TWI454729B (en) | Optical imaging lens and the application of the lens of the electronic device | |
| KR101425791B1 (en) | Imaging lens system | |
| US9395518B2 (en) | Imaging lens | |
| TWI490536B (en) | Portable electronic device with its optical imaging lens | |
| KR101358646B1 (en) | Fast Lens for near infrared ray and camera using the lens | |
| KR20140089004A (en) | Imaging lens system | |
| TWI537583B (en) | An optical imaging lens and an electronic device to which the optical imaging lens is applied | |
| CN105445900B (en) | Imaging lens, iris imaging module and iris identification device | |
| CN104091814A (en) | Pixel array of CMOS image sensor | |
| CN111142215B (en) | Optical assembly, identification module and mobile terminal | |
| CN201600711U (en) | Flat fingerprint collector | |
| KR101100615B1 (en) | Photographic lens optical system | |
| CN102360425A (en) | Thinned optical fingerprint acquirer | |
| CN101334509B (en) | Portable electronic device | |
| CN105279501B (en) | A kind of Zigzag type palm print collecting device of dark background | |
| US20120013787A1 (en) | High Resolution Image Capture Device and the Lens Set thereof | |
| CN110290328A (en) | A kind of focusing method, device, terminal and computer storage medium | |
| CN201489552U (en) | Flat fingerprint acquisition unit |
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 | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hangzhou City, Zhejiang province 310051 Binjiang District Jiang Hui Road No. 7 Building 1 layer 1-3 Patentee after: DESSMANN electric (China) Co., Ltd. Address before: Hangzhou City, Zhejiang province 310051 Binjiang District Jiang Hui Road No. 7 Building 1 layer 1-3 Patentee before: Zhejiang DESSMANN Mechanical & Electrical Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101006 |
|
| CX01 | Expiry of patent term |