CN105404879A - Fingerprint acquisition apparatus, imaging device of fingerprint acquisition apparatus, manufacturing method for imaging device and electronic device - Google Patents
Fingerprint acquisition apparatus, imaging device of fingerprint acquisition apparatus, manufacturing method for imaging device and electronic device Download PDFInfo
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- CN105404879A CN105404879A CN201510931041.7A CN201510931041A CN105404879A CN 105404879 A CN105404879 A CN 105404879A CN 201510931041 A CN201510931041 A CN 201510931041A CN 105404879 A CN105404879 A CN 105404879A
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- glass
- image device
- compound
- fingerprint acquisition
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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
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The present invention discloses a fingerprint acquisition apparatus, an imaging device of the fingerprint acquisition apparatus, a manufacturing method for the imaging device and an electronic device. The imaging device of the fingerprint acquisition apparatus comprises an acquisition surface and an imaging surface which are opposite. The acquisition surface has an acquisition region; the imaging surface has an imaging region corresponding to the acquisition region; the imaging device is provided with a plurality of small holes that connect the acquisition region with the imaging region; and the small holes are optically insulated. The imaging device provided by an embodiment of the invention is high in resolution and small in volume.
Description
Technical field
The present invention relates to fingerprint collecting technical field, particularly relate to a kind of fingerprint acquisition device and image device thereof and preparation method and electronic equipment.
Background technology
Along with the development of new and high technology, the miniaturization of imaging system has become one of research contents of information identification verification system.As fingerprint acquisition device, pattern recognition device etc. are progressively applied in the electronic equipment such as mobile phone, desktop computer.The image device of existing imaging system adopts prism, because during prism imaging, collection face and imaging surface, not in two parallel surfaces, therefore cause existing imaging system volume larger.Therefore existing imaging system has not met the development trend that such as electronic equipment such as mobile phone, panel computer is more and more thinner.In addition, existing imaging system is owing to adopting prism as image device imaging, and resolution is poor, also can not adapt to the high-resolution development trend of imaging.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of image device of fingerprint acquisition device, and fundamental purpose is the volume improving imaging resolution and reduce imaging system.
For achieving the above object, the present invention mainly provides following technical scheme:
On the one hand, embodiments provide a kind of image device of fingerprint acquisition device, comprise relative collection face and imaging surface, described collection mask has acquisition zone, described imaging surface has the imaging area corresponding with acquisition zone, described image device has the aperture of multiple through acquisition zone and imaging area, light insulation between described aperture.
As preferably, described acquisition zone and imaging area are positioned at the middle part of described image device, and the outside of described acquisition zone and imaging area forms installing zone.
As preferably, the xsect of described image device is circular or regular hexagon.
On the other hand, embodiments provide the preparation method of the image device of the fingerprint acquisition device described in a kind of above-described embodiment, comprise the steps:
The glass tube of acid proof glass material is sleeved on the glass bar that can be dissolved in the glass material of acid of size coupling, obtains glass bar pipe;
Wire drawing is carried out to glass bar pipe, obtains the first glass fiber;
By drawing shaping first glass fiber arrangement, tie up and obtain the first compound glass rod;
Wire drawing is carried out to the first compound glass rod, obtains the first compound glass silk;
By first compound glass silk arrangement, tie up obtain second compound glass rod;
Wire drawing is carried out to the second compound glass rod, obtains the second compound glass silk;
According to image device desired thickness, fixed length cutting is carried out to the second compound glass silk, and carry out typesetting according to the second compound glass silk after image device required form and large young pathbreaker's cutting, obtain hot-die base;
Hot-die base is placed in fusion pressure in hot pressing furnace shaping, obtains image device blank;
Heat treatment is carried out to blank, obtains the Semi-finished glass part of the size required by finished product;
Micro molding process is carried out to Semi-finished glass part, removes the glass material that can be dissolved in acid, obtain micropore glass part;
Above-mentioned micropore glass part is carried out reduction treatment, generates light absorbing zone at micro channel inwall, realize insulating between micropore, prevent optical crosstalk, obtain image device.
As preferably, the xsect of described first compound glass rod is regular hexagon.
As preferably, when described first glass fiber arranges the first compound glass rod, be filled with the 3rd glass fiber in the gap between the first glass fiber, described 3rd glass fiber rearranges secondary drawing after once being drawn by glass bar pipe or once drawing and obtains.
As preferably, described glass tube selects major component to be B
2o
3-SiO2-Al
2o
3-RO-R
2the glass of O, R0 is oxides, divalent, R
2o is univalent oxide; Described glass bar selects major component to be B
2o
3-La
2o
3the glass of-BaO.
As preferably, the core skin ratio of the described glass bar pipe ratio of the wall thickness of glass tube (diameter of glass bar with) is 5-12:1.Be preferably 10:1.
As preferably, during described Semi-finished glass part micro molding process, soaked in the acid solution of flowing by Semi-finished glass part, until the glass fiber that glass bar is drawn into all dissolves away, then ultrasonic cleaning in pure water, obtains micropore glass part.
As preferably, blank is carried out to heat treatment comprises round as a ball, cutting, plain grinding peace throws operation, the Semi-finished glass part obtained reaches the size required by finished product.
As preferably, described micropore glass part carries out reduction treatment in hydrogen reducing furnace, and Hydrogen Vapor Pressure is 0.01-0.3MPa, and temperature is 400-480 DEG C, and the time of process is 1-5 hour.
As preferably, when carrying out typesetting to the second compound glass silk, at the identical glass sheet of the material of the outside arrangement glass tube of the main body of the second compound glass silk composition or glass fiber, to form installing zone.
On the other hand, embodiments provide a kind of fingerprint acquisition device, comprise image device, described image device is the image device described in above-described embodiment.
On the other hand, embodiments provide a kind of electronic equipment, comprise fingerprint acquisition device, described fingerprint acquisition device is the fingerprint acquisition device described in above-described embodiment.
As preferably, described electronic equipment comprises mobile phone and panel computer.
Compared with prior art, beneficial effect of the present invention is:
The image device of the fingerprint acquisition device of the embodiment of the present invention has the feature of ultra-thin, miniaturization, super-resolution power, for information identification verification system provides key element.When fingerprint acquisition device of the present invention is used for electronic equipment, occupies volume little, meet the trend of the ultra-thin development of electronic equipment.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of the first compound glass rod obtained in the embodiment of the present invention 1;
Fig. 2 is the schematic cross-section of the second compound glass rod obtained in the embodiment of the present invention 1.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, but not as a limitation of the invention.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
Embodiment 1
Select the glass tube that acid proof glass material is made, the major component of the glass that general glass tube is selected is B
2o
3-SiO
2-Al
2o
3-RO-R
2o, R0 are oxides, divalent, as MgO, BaO etc., and R
2o is univalent oxide, as K
20, Na
2o etc.; The glass bar that the glass material that employing can be dissolved in acid is made, the major component of the glass that glass bar is selected is B
2o
3-La
2o
3-BaO.
The specification of the glass tube adopted is internal diameter 30 ± 0.2mm, and external diameter 39 ± 0.3mm, the specification of the glass bar of employing is 29.8 ± 0.2mm, glass tube is enclosed within glass bar and forms glass bar pipe outward.The core skin ratio of glass bar pipe elects 10:1 as.
The glass bar pipe of shape draws to be installed on high precision fiber wire drawing machine after cleaning, drying and makes the first glass fiber after being mated with glass bar by glass tube, and draw rate is 4.5mm/ minute; Wherein, the diameter of the first glass fiber is 2.8mm;
Many first glass fiber are arranged closely in regular hexagon mould, arrangement radical is determined by the first glass fiber diameter and die size, after having arranged, with copper wire or iron wire, two ends are closely tied up, center section raw material band carries out tying up of a determining deviation, obtain the first compound glass rod, the xsect of the first compound glass rod is regular hexagon; First compound glass rod to length of side 25mm;
The rear-mounted that is installed by first compound glass rod draws on wire drawing machine, and drawing method is identical with drawing the first glass fiber, and the first compound glass rod being drawn into xsect is orthohexagonal first compound glass silk;
First compound glass silk is arranged closely in regular hexagon mould, after having arranged, closely tied up at two ends with copper wire or iron wire, center section raw material band carries out tying up of a determining deviation, obtain xsect be orthohexagonal second compound glass rod, the second compound glass rod to length of side 25mm;
The rear-mounted that is installed by second compound glass rod carries out the drawing of secondary multifilament on wire drawing machine, and drawing method is identical with monofilament, and obtaining xsect is orthohexagonal second compound glass silk;
Second compound glass silk is carried out fixed length cutting according to the height of hot pressing die, second compound glass silk of the fixed length obtained after cutting carries out row's plate, obtains hot-die base, is loaded by hot-die base in hot pressing die, being placed in intensification pressurization in hot pressing furnace, to carry out fusion pressure shaping, obtains image device blank;
Carry out heat treatment to blank: after plate section shaping for fusion pressure is removed two, be placed in and spheronizator carry out round as a ball, round as a ball size is according to finished product size, and consider that following process surplus operates, plate section after round as a ball, microtome carries out surely thick cutting, and cutting thickness is 0.3mm; Then on Twp-sided polishing machine, complete the finishing polish of both ends of the surface, thickness deviation controls, at ± 0.01mm, to obtain the Semi-finished glass part meeting the size required by finished product;
Semi-finished glass part is placed on acid-resistant container and carries out micro molding, employing volumetric molar concentration is that the nitric acid of 0.5mol/L carries out acid etching to Semi-finished glass part, acid etching temperature is 60 DEG C, and preserve acid solution in acid corrosion process and be in flow state, until all silks be drawn into by the first glass bar dissolve, etching time is 2-5 hour; Acid etching terminates after rear pure water carries out ultrasonic cleaning to the second glass workpiece after acid etching, to obtain micropore glass part;
Micropore glass part is put in hydrogen reducing furnace and carries out reduction treatment, thus generate light absorbing zone at micro channel inwall from substrate, realize insulating between micropore, prevent optical crosstalk.Hydrogen Vapor Pressure during reduction treatment is 0.01-0.3MPa, and reduction treatment temperature is 400-480 DEG C, and the time of reduction treatment is 1-5 hour.Image device is obtained after reduction treatment completes.
Embodiment 2
The present embodiment is different from embodiment 1 to be, when arrangement the first glass fiber, be inserted with the 3rd glass fiber in the gap between compact arranged first glass fiber, the 3rd glass fiber is filled the gap between the first glass fiber.3rd glass fiber once can be drawn by glass bar pipe and form, with reference to the drawing of the first glass fiber, just less than the diameter of the first glass fiber, can fill the gap between the first glass fiber.Due to lower to the requirement of the 3rd glass fiber, even if therefore obtain by once drawing the quality that the less glass fiber of diameter also can not affect image device finished product.Certainly in order to improve the quality of the 3rd glass fiber, can be drawn by glass bar pipe secondary with reference to the mode of the first compound glass silk or the second compound glass silk and obtain the 3rd glass fiber, this avoid the 3rd glass fiber and once draw and cause broken wall.By filling the 3rd glass fiber, not only can improve the strength of joint of the first compound glass silk, and the resolving power of image device finished product can be improved further.
Embodiment 3
The present embodiment is from embodiment 1 or the different of embodiment 2, when second compound glass silk carries out row's plate, second compound glass silk arrangement forms main body, at glass sheet or the glass fiber of the outside of main body arrangement glass tubing matter, or the glass sheet made of arrangement and the glass of glass tube material expansion coefficient similar or glass fiber, thus formation installing zone.Because installing zone is non-imaged area, require lower, material cost and cost of manufacture are all lower, can reduce the holistic cost of image device.The acquisition zone of the image device of the present embodiment is side, collection face main part, and imaging area is imaging surface side main part, and installing zone does not have micropore, and preparation is simple.The installing zone of the image device that embodiment 1 and embodiment 2 obtain and the main part of acquisition zone and imaging area indistinction are therefore high compared with the cost of embodiment 3.
The performance index of the image device of embodiment 1 and embodiment 2 gained are in table 1.
Table 1
Visible, the preparation method of micro-pore imaging device provided by the invention can produce the optical imaging device of high resolution, ultra-thin, miniaturization, focal length can adjust arbitrarily according to requirement of system design simultaneously, breach glass material, fibre faceplate material to the restriction of transmission range, the critical material becoming information identification verification system should, in addition, this moulding material, all can imaging from deep ultraviolet to mid and far infrared not by the restriction of target wavelength.
Therefore, adopt the volume of the fingerprint acquisition device of the image device of the embodiment of the present invention to reach reduction, and resolving power improve greatly.
Adopt the electronic equipment of the fingerprint acquisition device of the embodiment of the present invention can reduce thickness further.Visible, the fingerprint acquisition device of the embodiment of the present invention meets the trend of the ultra-thin development of current electronic equipment.Above-mentioned electronic equipment comprises mobile phone and panel computer etc.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (15)
1. the image device of fingerprint acquisition device, it is characterized in that, comprise relative collection face and imaging surface, described collection mask has acquisition zone, described imaging surface has the imaging area corresponding with acquisition zone, described image device has the aperture of multiple through acquisition zone and imaging area, light insulation between described aperture.
2. the image device of fingerprint acquisition device according to claim 1, is characterized in that, described acquisition zone and imaging area are positioned at the middle part of described image device, and the outside of described acquisition zone and imaging area forms installing zone.
3. the image device of fingerprint acquisition device according to claim 1, is characterized in that, the xsect of described image device is circular or regular hexagon.
4. the preparation method of the image device of fingerprint acquisition device according to claim 1, comprises the steps:
The glass tube of acid proof glass material is sleeved on the glass bar that can be dissolved in the glass material of acid of size coupling, obtains glass bar pipe;
Wire drawing is carried out to glass bar pipe, obtains the first glass fiber;
By drawing shaping first glass fiber arrangement, tie up and obtain the first compound glass rod;
Wire drawing is carried out to the first compound glass rod, obtains the first compound glass silk;
By first compound glass silk arrangement, tie up obtain second compound glass rod;
Wire drawing is carried out to the second compound glass rod, obtains the second compound glass silk;
According to image device desired thickness, fixed length cutting is carried out to the second compound glass silk, and carry out typesetting according to the second compound glass silk after image device required form and large young pathbreaker's cutting, obtain hot-die base;
Hot-die base is placed in fusion pressure in hot pressing furnace shaping, obtains image device blank;
Heat treatment is carried out to blank, obtains the Semi-finished glass part of the size required by finished product;
Micro molding process is carried out to Semi-finished glass part, removes the glass material that can be dissolved in acid, obtain micropore glass part;
Above-mentioned micropore glass part is carried out reduction treatment, generates light absorbing zone at micro channel inwall, realize insulating between micropore, prevent optical crosstalk, obtain image device.
5. preparation method according to claim 4, is characterized in that, the xsect of described first compound glass rod is regular hexagon.
6. preparation method according to claim 4, it is characterized in that, when described first glass fiber arranges the first compound glass rod, be filled with the 3rd glass fiber in gap between first glass fiber, described 3rd glass fiber rearranges secondary drawing after once being drawn by glass bar pipe or once drawing and obtains.
7. preparation method according to claim 4, is characterized in that, described glass tube selects major component to be B
2o
3-SiO2-Al
2o
3-RO-R
2the glass of O, R0 is oxides, divalent, R
2o is univalent oxide; Described glass bar selects major component to be B
2o
3-La
2o
3the glass of-BaO.
8. preparation method according to claim 4, is characterized in that, the diameter of described glass bar is 5-12:1 with the ratio of the wall thickness of glass tube.
9. preparation method according to claim 4, it is characterized in that, during described Semi-finished glass part micro molding process, Semi-finished glass part is soaked in the acid solution of flowing, until the glass fiber that glass bar is drawn into all dissolves away, then ultrasonic cleaning in pure water, obtains micropore glass part.
10. preparation method according to claim 4, is characterized in that, to blank carry out heat treatment comprise round as a ball, cutting, plain grinding peace throw operation, the Semi-finished glass part obtained reaches the size required by finished product.
11. preparation methods according to claim 4, is characterized in that, described micropore glass part carries out reduction treatment in hydrogen reducing furnace, and Hydrogen Vapor Pressure is 0.01-0.3MPa, and temperature is 400-480 DEG C, and the time of process is 1-5 hour.
12. preparation methods according to claim 4, is characterized in that, when carrying out typesetting to the second compound glass silk, at the identical glass sheet of material or the glass fiber of the outside arrangement glass tube of the main body of the second compound glass silk composition, to form installing zone.
13. fingerprint acquisition devices, comprise image device, it is characterized in that, described image device is image device according to claim 1.
14. electronic equipments, comprise fingerprint acquisition device, it is characterized in that, described fingerprint acquisition device is fingerprint acquisition device according to claim 13.
15. electronic equipments according to claim 14, is characterized in that, described electronic equipment comprises mobile phone and panel computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510931041.7A CN105404879A (en) | 2015-12-15 | 2015-12-15 | Fingerprint acquisition apparatus, imaging device of fingerprint acquisition apparatus, manufacturing method for imaging device and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510931041.7A CN105404879A (en) | 2015-12-15 | 2015-12-15 | Fingerprint acquisition apparatus, imaging device of fingerprint acquisition apparatus, manufacturing method for imaging device and electronic device |
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| Publication Number | Publication Date |
|---|---|
| CN105404879A true CN105404879A (en) | 2016-03-16 |
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|---|---|---|---|
| CN201510931041.7A Pending CN105404879A (en) | 2015-12-15 | 2015-12-15 | Fingerprint acquisition apparatus, imaging device of fingerprint acquisition apparatus, manufacturing method for imaging device and electronic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095838A (en) * | 2019-05-23 | 2019-08-06 | 中国建筑材料科学研究总院有限公司 | Large area optical fibre face plate and preparation method thereof |
| US11501555B2 (en) | 2018-02-06 | 2022-11-15 | Shenzhen GOODIX Technology Co., Ltd. | Under-screen biometric identification apparatus and electronic device |
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| US20040028262A1 (en) * | 2002-08-09 | 2004-02-12 | Kuo-Liang Lin | Optical system of fingerprint image capture apparatus |
| CN104063704A (en) * | 2014-04-04 | 2014-09-24 | 深圳印象认知技术有限公司 | Image collection device, liquid crystal terminal device and fingerprint and image collection method |
| CN104459877A (en) * | 2014-11-28 | 2015-03-25 | 中国建筑材料科学研究总院 | Optical fiber face plate fractal filament arranging method and filament arranging dies thereof |
| CN104730618A (en) * | 2015-03-13 | 2015-06-24 | 中国建筑材料科学研究总院 | Collimator and manufacturing method thereof |
-
2015
- 2015-12-15 CN CN201510931041.7A patent/CN105404879A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040028262A1 (en) * | 2002-08-09 | 2004-02-12 | Kuo-Liang Lin | Optical system of fingerprint image capture apparatus |
| CN104063704A (en) * | 2014-04-04 | 2014-09-24 | 深圳印象认知技术有限公司 | Image collection device, liquid crystal terminal device and fingerprint and image collection method |
| CN104459877A (en) * | 2014-11-28 | 2015-03-25 | 中国建筑材料科学研究总院 | Optical fiber face plate fractal filament arranging method and filament arranging dies thereof |
| CN104730618A (en) * | 2015-03-13 | 2015-06-24 | 中国建筑材料科学研究总院 | Collimator and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11501555B2 (en) | 2018-02-06 | 2022-11-15 | Shenzhen GOODIX Technology Co., Ltd. | Under-screen biometric identification apparatus and electronic device |
| CN110095838A (en) * | 2019-05-23 | 2019-08-06 | 中国建筑材料科学研究总院有限公司 | Large area optical fibre face plate and preparation method thereof |
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Application publication date: 20160316 |