CN208460036U - A kind of novel finger print recognition imaging system under mobile phone screen - Google Patents
A kind of novel finger print recognition imaging system under mobile phone screen Download PDFInfo
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- CN208460036U CN208460036U CN201821192216.2U CN201821192216U CN208460036U CN 208460036 U CN208460036 U CN 208460036U CN 201821192216 U CN201821192216 U CN 201821192216U CN 208460036 U CN208460036 U CN 208460036U
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- mobile phone
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- phone screen
- finger print
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Abstract
The utility model discloses the novel finger print recognition imaging systems under a kind of mobile phone screen, the main points of its technical scheme are that being once equipped with aperture, the first lens, optical filter, COMS sensitive film from object plane to image planes, the aperture is located at the rear of mobile phone screen, first lens are positive focal length lenses, it is oblate aspherical towards the first face of object plane, is that hyperbola is aspherical towards the second face of image planes.The utility model thickness ultrathin, volume are extra small, visual field is big, fingerprint identifying optical system will gradually replace the capacitance type fingerprint of present mainstream to identify under this kind of optical profile type screen, meet comprehensive screen mobile phone development trend, 100,000 pixel resolutions or more can be reached, the performance requirement for meeting image planes, the information content that takes the fingerprint are enough.
Description
[technical field]
The utility model relates to the novel finger print recognition imaging systems under a kind of mobile phone screen.
[background technique]
Mobile fingerprint used at present identifies generally existing such disadvantage: mobile phone market fingerprint recognition system for unlocking at present
Mainly capacitive fingerprint identifies, can not realize the full frame mobile phone of the development trend-of the following mainstream；The photograph of present mainstream in the market
Phase mobile phone is mainly capacitance type fingerprint identification, but wearability is bad, and easy scuffing causes identifying system to lose function；It cannot be complete
The characteristics of meeting comprehensive screen mobile phone.And fingerprint identifying optical system advantage is thickness ultrathin under optical profile type screen, volume is extra small,
Meet comprehensive screen mobile phone development trend.
The utility model is namely based on what such case was made.
[utility model content]
The utility model aim is to overcome the deficiencies in the prior art, provide it is a kind of it is ultra-thin, volume is extra small, the big hand of visual field
Novel finger print recognition imaging system under machine screen.
The utility model is achieved through the following technical solutions:
Novel finger print recognition imaging system under a kind of mobile phone screen, it is characterised in that: be once equipped with from object plane to image planes
Aperture 2, the first lens 3, optical filter 4, COMS sensitive film 5, the aperture 2 are located at the rear of mobile phone screen 1, and described first
Lens 3 are positive focal length lenses, are oblate aspherical towards the first face 31 of object plane, are hyperbolic towards the second face 32 of image planes
Line is aspherical.
Novel finger print recognition imaging system under mobile phone screen as described above, it is characterised in that: 3 system of the first lens
Element characteristic meets following formula: 0.3 < f1 < 1, and 21≤vd lens 1≤59, f1 are the focal length of the first lens 3；vd lens
1 is the abbe number of the first lens 3.
Novel finger print recognition imaging system under mobile phone screen as described above, it is characterised in that: first lens 3
Aspherical surface shape meets following equation: Z=cy2/{1+[1-(1+k)c2y2]1/2}+a1y2+a2y4+a3y6+a4y8+a5y10+
a6y12+a7y14+a8y16；In formula, parameter c is curvature corresponding to radius, and y is radial coordinate, and k is circular cone system of conics
Number；When k-factor is less than -1, the face shape curve of lens is hyperbola, and when k-factor is equal to -1, the face shape curve of lens is to throw
Object line；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, and when k-factor is equal to 0, the face shape of lens is bent
Line is circle, and when k-factor is greater than 0, the face shape curve of lens is oblateness；a1To a8It respectively indicates corresponding to each radial coordinate
Coefficient.
Compared with prior art, the utility model has the following advantages:
1, novel finger print recognition imaging system thickness under the utility model mobile phone screen is ultra-thin, volume is extra small, and visual field is big,
Fingerprint identifying optical system will gradually replace the capacitance type fingerprint of present mainstream to identify under this kind of optical profile type screen, meet comprehensive screen
Mobile phone development trend.
2, the utility model optical imaging system can reach 100,000 pixels or more, meet the performance requirement of image planes, extract
Finger print information amount is enough.
3, the illumination image planes entirety even edge illumination of the utility model, high brightness, F-number reach F1.75.
4, maximum to 100 degree of wide-angle imaging may be implemented in the utility model, realizes the big function of small size intake object plane
Energy.
5, the utility model optical imaging system is due to using one piece of plastic aspherical element eyeglass, so optical fingerprint is known
The cost of other system reduces, small in size, and optics overall length 3.5mm is hereinafter, the ultra-thin feature of the comprehensive screen of the mobile phone for meeting mainstream.
[Detailed description of the invention]
Fig. 1 is the schematic diagram of the utility model；
Fig. 2 is the utility model light path schematic diagram.
In figure: 1 is mobile phone screen；2 be aperture；3 be the first lens；31 be the first face；32 be the second face；4 be optical filtering
Piece；5 be COMS sensitive film.
[specific embodiment]
The utility model technical characteristic is described in further detail in order to the field technology people with reference to the accompanying drawing
Member understands.
As shown in Figure 1, 2, the novel finger print recognition imaging system under a kind of mobile phone screen, it is specially saturating for plastic aspherical element
The large aperture wide-angle optical lens of mirror structure can be used for relatively cheap pixel CMOS sensitive film 5, put down for first piece before optical path
Surface glass is screen 1, is successively arranged the first lens 3, optical filter 4, COMS sensitive film 5 after aperture 2.First lens 3
Be positive focal length lenses, is oblate aspherical towards the first face 31 of object plane, is that hyperbola is non-towards the second face 32 of image planes
Spherical surface.
First lens, the 3 system element characteristic meets following formula: 0.3 < f1 < 1,21≤vd lens 1≤59,
F1 is followed successively by the focal length of the first lens；Vd lens 1 is the abbe number of the first lens 3, in optical texture, the first lens
F1 can solve the focal length problem of the utility model optical texture, effectively realize the ultra-thin problem of imaging system degree.
Aperture diaphragm face is located at the front of the first lens of optical system 3, it can make into the eyeglass clear aperture of system
The angle of emergence that is small while reducing optical system, so that the volume of optical system minimizes.
The aspherical surface shape of first lens 3 meets following equation:
Z=cy2/{1+[1-(1+k)c2y2]1/2}+a1y2+a2y4+a3y6+a4y8+a5y10+a6y12+a7y14+a8y16；In formula
In, parameter c is curvature corresponding to radius, and y is that its unit of radial coordinate is identical with length of lens unit, and k is the secondary song of circular cone
Linear system number；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1, the face shape curve of lens
For parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0, the face of lens
Shape curve is circle, and when k-factor is greater than 0, the face shape curve of lens is oblateness；a1To a8Respectively indicate each radial coordinate institute
Corresponding coefficient.
The first cases of design of the application:
1, optical parameter
Wherein OBJ indicates that object plane, STO indicate diaphragm face.
2, lens asphericity coefficient
The second cases of design of the application:
1, optical parameter
Wherein OBJ indicates that object plane, STO indicate diaphragm face.
2, lens asphericity coefficient
Combine figure embodiment that the utility model is described in detail above, those skilled in the art can root
Many variations example is made to the utility model according to above description.Thus, certain details in embodiment should not constitute practical to this
Novel restriction, the utility model will be using the ranges that the appended claims define as the protection scope of the utility model.
Claims (3)
1. the novel finger print recognition imaging system under a kind of mobile phone screen, it is characterised in that: be once equipped with light from object plane to image planes
Late hole (2), the first lens (3), optical filter (4), COMS sensitive film (5), after the aperture (2) is located at mobile phone screen (1)
Side, first lens (3) are positive focal length lenses, be towards the first face (31) of object plane it is oblate aspherical, towards image planes
The second face (32) be hyperbola it is aspherical.
2. the novel finger print recognition imaging system under mobile phone screen according to claim 1, it is characterised in that: described first thoroughly
Mirror (3) system element characteristic meets following formula: 0.3 < f1 < 1, and 21≤vd lens 1≤59, f1 are the first lens (3)
Focal length；Vd lens 1 is the abbe number of the first lens (3).
3. the novel finger print recognition imaging system under mobile phone screen according to claim 1, it is characterised in that: described first
The aspherical surface shape of lens (3) meets following equation: Z=cy2/{1+[1-(1+k)c2y2]1/2}+a1y2+a2y4+a3y6+
a4y8+a5y10+a6y12+a7y14+a8y16；In formula, parameter c is curvature corresponding to radius, and y is radial coordinate, and k is circular cone
Whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1, the face of lens
Shape curve is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0, thoroughly
The face shape curve of mirror is circle, and when k-factor is greater than 0, the face shape curve of lens is oblateness；a1To a8Respectively indicate each radial direction
Coefficient corresponding to coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821192216.2U CN208460036U (en) | 2018-07-25 | 2018-07-25 | A kind of novel finger print recognition imaging system under mobile phone screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821192216.2U CN208460036U (en) | 2018-07-25 | 2018-07-25 | A kind of novel finger print recognition imaging system under mobile phone screen |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710869A (en) * | 2018-07-25 | 2018-10-26 | 中山联合光电科技股份有限公司 | A kind of fingerprint recognition imaging system under mobile phone screen |
| CN110276337A (en) * | 2019-07-29 | 2019-09-24 | 上海菲戈恩微电子科技有限公司 | Microlens light channel structure and electronic equipment for OLED screen curtain fingerprint recognition |
| CN110764234A (en) * | 2019-12-25 | 2020-02-07 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
| US11450136B2 (en) | 2019-12-25 | 2022-09-20 | Jiangxi Lianyi Optics Co., Ltd. | Optical lens, fingerprint recognition module and mobile terminal |
-
2018
- 2018-07-25 CN CN201821192216.2U patent/CN208460036U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710869A (en) * | 2018-07-25 | 2018-10-26 | 中山联合光电科技股份有限公司 | A kind of fingerprint recognition imaging system under mobile phone screen |
| CN110276337A (en) * | 2019-07-29 | 2019-09-24 | 上海菲戈恩微电子科技有限公司 | Microlens light channel structure and electronic equipment for OLED screen curtain fingerprint recognition |
| CN110764234A (en) * | 2019-12-25 | 2020-02-07 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
| CN110764234B (en) * | 2019-12-25 | 2020-03-31 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
| US11450136B2 (en) | 2019-12-25 | 2022-09-20 | Jiangxi Lianyi Optics Co., Ltd. | Optical lens, fingerprint recognition module and mobile terminal |
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