CN208271198U - Bio-identification optical module and device - Google Patents
Bio-identification optical module and device Download PDFInfo
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- CN208271198U CN208271198U CN201820495439.XU CN201820495439U CN208271198U CN 208271198 U CN208271198 U CN 208271198U CN 201820495439 U CN201820495439 U CN 201820495439U CN 208271198 U CN208271198 U CN 208271198U
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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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- 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
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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
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/19—Sensors therefor
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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
- G06V40/14—Vascular patterns
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- General Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
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Abstract
The utility model discloses a kind of bio-identification optical modules, it successively include plate glass group, the lens group containing brightness aperture, optical filter and sensitive chip from object side, the plate glass group includes the first plate glass, and is satisfied the following conditional expression: TTL/f < 10.3；D/f<4.2；Wherein, TTL is photosurface the distance between of the first plate glass object side to sensitive chip, and f is the focal length of lens group, and D is the diagonal length of the photosurface of sensitive chip.Bio-identification optical module provided by the utility model has the characteristics that performance is good, compact-sized, small and exquisite.The invention also discloses a kind of bio-identification Optical devices.
Description
Technical field
The utility model relates to bio-identification optical technical fields, specifically, being related to a kind of bio-identification optical module
And device.
Background technique
The arrival of the universal Internet of Things interconnected with upcoming all things on earth of mobile Internet, people are to healthy, safe, new
The demand of things experience is more and more, it is desirable that and it is also higher and higher, if comprehensive screen of mobile field rises, because capacitive fingerprint identification accounts for
According to the space of screen, it is unfavorable for user experience, forces the region of fingerprint recognition to become inevitable under screen by moving on on screen, shield lower optics
Identification also becomes a kind of trend；For another example, various wearable applications need to carry out each of interpretation biology to the angiography imaging of biology
Shape, blood flow velocity variation, changes in heart rate, the blood various parameters etc. of kind feature such as vein；For another example, the knowledge of biometric iris texture
Not, such as spot, striped, filament, coronal, crypts and eyeball lesion.
However, it is the technological difficulties for shielding lower fingerprint recognition that it is integrated that lower optical fingerprint identification system meagreization, which how will be shielded,
How the cost that chip is gradually reduced to simultaneously and advantageously reduced chip in whole system, obtain high-quality shadow in lesser space
As even more technological difficulties, the light demand of various wearable products also needs lower power consumption, component microminiaturization to improve user's
Experience, the microminiaturization of Photobiology identifying system are conducive to the small of biological angiography identification device and biometric iris identification device
Type is converted into mass consumption product from high large scale equipment.
Utility model content
The purpose of this utility model is to provide a kind of bio-identification optical modules, have the characteristics that compact-sized, small and exquisite.
Technical solution used by bio-identification optical module disclosed by the utility model is:
A kind of bio-identification optical module successively includes plate glass group, the lens group containing brightness aperture, filter from object side
Mating plate and sensitive chip, the plate glass group includes the first plate glass, and is satisfied the following conditional expression:
TTL/f<10.3；
D/f<4.2；
Wherein, TTL is photosurface the distance between of the first plate glass object side to sensitive chip, and f is lens group
Focal length, D are the diagonal lengths of the photosurface of sensitive chip.
Preferably, the plate glass group further includes the second plate glass, and second plate glass is set to the
Between one plate glass and lens group containing brightness aperture.
Preferably, the lens group containing brightness aperture includes brightness aperture and the first lens.
Preferably, the lens group containing brightness aperture further includes the second lens.
Preferably, the brightness aperture is set between the first lens and plate glass group, and first lens are set
Between brightness aperture and the second lens.
Preferably, first lens are set between brightness aperture and plate glass group, and the brightness aperture is set
Between the first lens and the second lens.
Preferably, first lens be on one side be aspherical lens.
Preferably, second lens are plastic lens.
A kind of beneficial effect of bio-identification optical module disclosed by the utility model is: TTL/f < 10.3 ensure that structure is tight
It gathers, is flat, D/f < 4.2 are conducive to chip size microminiaturization, and the biological characteristic before the first plate glass is imaged on chip by lens group
Photosurface on, obtain optimal imaging effect, can effectively solve interference of the screen flowering structure to image quality, set convenient for portable mobile
Standby upper application.
Bio-identification Optical devices are also disclosed in the utility model, can be used for for shielding lower fingerprint recognition, angiography identification
And iris recognition.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model bio-identification optical module embodiment one；
Fig. 2 is the MTF curve performance map of the utility model bio-identification optical module embodiment one；
Fig. 3 is that the period striped of the utility model bio-identification optical module embodiment one differentiates identification schematic diagram；
Fig. 4 is the structural schematic diagram of the utility model bio-identification optical module embodiment two；
Fig. 5 is the MTF curve performance map of the utility model bio-identification optical module embodiment two；
Fig. 6 is that the period striped of the utility model bio-identification optical module embodiment two differentiates identification schematic diagram；
Fig. 7 is the structural schematic diagram of the utility model bio-identification optical module embodiment three；
Fig. 8 is the MTF curve performance map of the utility model bio-identification optical module embodiment three；
Fig. 9 is that the period striped of the utility model bio-identification optical module embodiment three differentiates identification schematic diagram；
Figure 10 is the structural schematic diagram of the utility model bio-identification optical module example IV；
Figure 11 is the MTF curve performance map of the utility model bio-identification optical module example IV；
Figure 12 is that the period striped of the utility model bio-identification optical module example IV differentiates identification schematic diagram；
Figure 13 is the structural schematic diagram of the utility model bio-identification optical module embodiment five；
Figure 14 is the MTF curve performance map of the utility model bio-identification optical module embodiment five；
Figure 15 is that the period striped of the utility model bio-identification optical module embodiment five differentiates identification schematic diagram.
Specific embodiment
A kind of bio-identification optical module successively includes plate glass group, the lens group containing brightness aperture, filter from object side
Mating plate and sensitive chip, the plate glass group include the first plate glass, and the bio-identification optical module meets following item
Part formula:
TTL/f<10.3；D/f<4.2；
Wherein, TTL is photosurface the distance between of the first plate glass front surface to sensitive chip, and f is described
The focal length of bio-identification optical module, D are the diagonal lengths of the photosurface of the sensitive chip.
If TTL/f be more than its upper limit, be unfavorable for it is compact-sized, if D/f be more than its upper limit, it is micro- to be unfavorable for sensitive chip size
Smallization, brightness aperture play the effect how many into light quantity that adjust, and the lens group containing brightness aperture will be before the first plate glass
Biological characteristic is imaged on the photosurface of sensitive chip, and front and back adjusts the position of the lens group containing brightness aperture, can get most
Good imaging effect, combination processing circuit, data processing algorithm obtain useful biological information.
Brightness aperture plays the effect how many into light quantity that adjust, and size has with the lens group performance containing brightness aperture
It closes, it is related with sensitive chip unit size, suitable brightness aperture is set and is had a certain impact to best identified effect；
Preferably, plate glass group includes the second plate glass, the printable or brightness aperture table behind that reclines
Fixed aperture position, protection brightness aperture are played the role of in face, and its thickness can have micro- according to component external Space adjustment
Adjusting body structure length meets different application demand.
Preferably, the lens group containing brightness aperture contains at least 1 lens, containing 2 and 2 or more
Lens also help improvement improving performance；
Preferably, the lens group containing brightness aperture includes brightness aperture, the first lens and the second lens,
Brightness aperture is set to the manufacture difficulty that can be reduced between the first lens and the second lens to brightness aperture, while improving component to non-
The sensibility of metrical aberrations, such as in the case where brightness aperture increases, effect is more advantageous.
It is aspherical lens that the lens group containing brightness aperture, which contains at least one side, aspherical to be effectively improved
The aberration of marginal ray preferably corrects spherical aberration and marginal aberration, obtains better aberration performance, while advantageous adjustment
The edge thickness of lens is conducive to processing；It is aspherical or all aspherical that the lens group can contain multi-panel.
Preferably, the lens group containing brightness aperture contains at least piece of plastic lens, is conducive to batch and infuses
It is moulded into type production, cost is reduced, multi-disc plastic lens can be contained or all using plastic lens.
Bio-identification optical module disclosed by the utility model can effectively solve interference of the screen flowering structure to image quality, full
Foot shields lower fingerprint recognition；Be able to satisfy the demand of bio-identification, have performance is good, compact-sized, sensitive chip can microminiaturization and just
In applied on Mobile portable equipment the characteristics of.
In order to realize the effect and purpose of the utility model, in embodiments, following aspherical formulas are used:
Wherein, Z indicates the aspherical rise along optical axis direction, and y indicates the aspherical distance along vertical optical axis direction, c table
Show curvature of centre, be the inverse of radius, k indicates circular cone coefficient or quadratic term constant, A2-A16 respectively indicate 2 times -16 times it is non-
Asphere coefficient.
The utility model is further elaborated and is illustrated with Figure of description combined with specific embodiments below:
Embodiment 1
Fig. 1 is please referred to, a kind of bio-identification optical module includes successively the first plate glass 10, brightness aperture 30, has
The first lens 20, optical filter 40 and the sensitive chip 50 of positive light coke, the first plate glass 10 are the protection glass of screen, thickness
1.2mm, the optical filter 40 end the light of unwanted long-wave band, reduce the interference of long-wave band light, 20 liang of first lens
Face be it is aspherical, and 50 side of sensitive chip have convex aspheric surface, it is aspherical can be with the effect of General Promotion product.This implementation
Example is able to achieve TTL less than 4mm, and identification region is greater than 5mm*5mm, and 50 diagonal-size of sensitive chip can be less than 1.2mm, meet
Preferable cost effectiveness is obtained on the basis of recognition effect.
It is the relevant parameter about component below:
Embodiment 2
Please refer to Fig. 2, a kind of bio-identification optical module, successively include the first plate glass 10, the second plate glass 11,
Brightness aperture 30, the first lens 20, optical filter 40 and sensitive chip 50 with positive light coke, first plate glass 10 are
The protection glass of screen, thickness 1.6mm, the 11 thickness 0.3mm of the second plate glass, thickness can be according to component external space
It adjusts, fine-tuning overall structure length, meets different application demand, while the image side surface of the second plate glass 11 can print or patch
By brightness aperture 30, the optical filter 40 ends the light of unwanted long-wave band, reduces the interference of long-wave band light, the first lens 20
Two sides be it is aspherical, 50 side of sensitive chip be convex aspheric surface, it is aspherical can be with the effect of General Promotion product.This
Embodiment is able to achieve TTL less than 4.2mm, and identification region is greater than 4mm*4mm, and chip diagonal-size can be less than 1.2mm, meet
On the basis of recognition effect, has and assemble simple, compact-sized and comprehensive preferable cost advantage effect.
It is the relevant parameter about component below:
Embodiment 3
Fig. 7 is please referred to, a kind of bio-identification optical module successively includes the first plate glass 10, brightness aperture from object side
30, the first lens 21, the second lens 22, optical filter 40 and sensitive chip 50, first plate glass 10 are the protection of screen
Glass, thickness 2.0mm, the optical filter 40 end the light of unwanted long-wave band, reduce the interference of long-wave band light, the first lens
21 two sides is aspherical, and 21 object side of the first lens is with the aspherical of inflection point, and the two sides of the second lens 22 is
It is aspherical, and image side surface is convex surface, can obtain comprehensive balancing performance promotion using aspherical.It is small that the present embodiment is able to achieve TTL
In 5.0mm, identification region is greater than 6.0mm*6.0mm, and sensitive chip diagonal-size can be less than 1.4mm, obtain preferable performance
Effect and compact-sized advantage.
It is the detail parameters about component below:
Embodiment 4
Figure 10 is please referred to, a kind of bio-identification optical module successively includes the first plate glass 10, the first lens from object side
21, brightness aperture 30, the second lens 22, optical filter 40 and sensitive chip 50, the first plate glass 10 are the protection glass of screen,
Thickness 2.0mm, the optical filter 40 end the light of unwanted long-wave band, reduce the interference of long-wave band light；First lens 21
Two sides is aspherical, and 20 object side of the first lens is with the aspherical of inflection point, and the two sides of the second lens 22 is aspheric
Face, and image side surface is convex surface, can obtain comprehensive balancing performance promotion using aspherical.The present embodiment is able to achieve TTL and is less than
5.0mm, identification region be greater than 6.0mm*6.0mm, chip diagonal-size D can be less than 1.4mm, obtain the preferable impact of performance and
Compact-sized advantage.
It is the detail parameters about component below:
Embodiment 5
Figure 13 is please referred to, a kind of bio-identification optical module successively includes the first plate glass 10, the second plate from object side
Glass 11, the first lens 21, brightness aperture 30, the second lens 22, optical filter 40 and sensitive chip 50, the first plate glass 10 are
The protection glass of screen, thickness 2.0mm, the second plate glass 11 is with a thickness of 0.3, and thickness is according to the exterior space where component
It adjusts, fine-tuning overall structure length meets different application demand, and the optical filter 40 ends unwanted long-wave band
Light reduces the interference of long-wave band light, and the two sides of the first lens 21 is aspherical, and 21 object side of the first lens is with inflection point
It is aspherical, the two sides of the second lens 22 is aspherical, and image side surface is convex surface, can obtain comprehensive performance using aspherical
Equilibrium is promoted.The present embodiment is able to achieve TTL less than 5.0mm, and identification region is greater than 6.3mm*6.3mm, and chip diagonal-size can be with
Less than 1.4mm, the preferable impact of performance, compact-sized and component adjustable advantage are obtained.
It is the detail parameters about component below:
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (11)
1. a kind of bio-identification optical module successively includes plate glass group, the lens group containing brightness aperture, filters from object side
Piece and sensitive chip, the plate glass group include the first plate glass, which is characterized in that and satisfy the following conditional expression:
TTL/f<10.3；
D/f<4.2；
Wherein, TTL is photosurface the distance between of the first plate glass object side to sensitive chip, and f is the focal length of lens group,
D is the diagonal length of the photosurface of sensitive chip.
2. bio-identification optical module as described in claim 1, which is characterized in that the plate glass group further includes second flat
Glass sheet, second plate glass are set between the first plate glass and lens group containing brightness aperture.
3. bio-identification optical module as claimed in claim 1 or 2, which is characterized in that the lens containing brightness aperture
Group includes brightness aperture and the first lens.
4. bio-identification optical module as claimed in claim 3, which is characterized in that the lens group containing brightness aperture is also
Including the second lens.
5. bio-identification optical module as claimed in claim 4, which is characterized in that the brightness aperture be set to the first lens and
Between plate glass group, first lens are set between brightness aperture and the second lens.
6. bio-identification optical module as claimed in claim 4, which is characterized in that first lens be set to brightness aperture and
Between plate glass group, the brightness aperture is set between the first lens and the second lens.
7. bio-identification optical module as claimed in claim 4, which is characterized in that second lens are plastic lens.
8. bio-identification optical module as claimed in claim 3, which is characterized in that first lens be on one side be aspherical
Lens.
9. a kind of bio-identification Optical devices, which is characterized in that contain the described in any item bio-identification optics of claim 1-5
Component, for shielding lower fingerprint recognition.
10. a kind of bio-identification Optical devices, which is characterized in that contain the described in any item bio-identification light of claim 1-5
Component is learned, is identified for angiography.
11. a kind of bio-identification Optical devices, which is characterized in that contain the described in any item bio-identification light of claim 1-5
Component is learned, iris recognition is used for.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018101829693 | 2018-03-06 | ||
| CN201810182969 | 2018-03-06 |
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| CN208271198U true CN208271198U (en) | 2018-12-21 |
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| CN201820495439.XU Active CN208271198U (en) | 2018-03-06 | 2018-04-09 | Bio-identification optical module and device |
| CN201810312668.8A Pending CN108537173A (en) | 2018-03-06 | 2018-04-09 | Bio-identification optical module and device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810312668.8A Pending CN108537173A (en) | 2018-03-06 | 2018-04-09 | Bio-identification optical module and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108537173A (en) * | 2018-03-06 | 2018-09-14 | 东莞市宇光光电科技有限公司 | Bio-identification optical module and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI422897B (en) * | 2010-11-10 | 2014-01-11 | Largan Precision Co | Optical imaging lens assembly |
| CN107590425A (en) * | 2016-07-08 | 2018-01-16 | 北京日立北工大信息系統有限公司 | Vein authentication apparatus and its vein authentication method |
| CN106443972B (en) * | 2016-11-29 | 2019-01-22 | 福建师范大学 | Iris recognition optical imaging lens group and its imaging method |
| CN107144943B (en) * | 2017-07-18 | 2022-09-09 | 浙江舜宇光学有限公司 | Camera lens |
| CN208271198U (en) * | 2018-03-06 | 2018-12-21 | 东莞市宇光光电科技有限公司 | Bio-identification optical module and device |
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2018
- 2018-04-09 CN CN201820495439.XU patent/CN208271198U/en active Active
- 2018-04-09 CN CN201810312668.8A patent/CN108537173A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108537173A (en) * | 2018-03-06 | 2018-09-14 | 东莞市宇光光电科技有限公司 | Bio-identification optical module and device |
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