CN107589516A - Projection lens and lens assembly - Google Patents
Projection lens and lens assembly Download PDFInfo
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- CN107589516A CN107589516A CN201610530268.5A CN201610530268A CN107589516A CN 107589516 A CN107589516 A CN 107589516A CN 201610530268 A CN201610530268 A CN 201610530268A CN 107589516 A CN107589516 A CN 107589516A
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- lens
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- projection lens
- diopter
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Abstract
The invention discloses a kind of projection lens and lens assembly, projection lens is sequentially made up of from Zoom Side to reduced side the first lens, the second lens and the 3rd lens.First lens have positive diopter, and the second lens have negative diopter, and the 3rd lens have positive diopter.In the projection lens of embodiment of the present invention, because the diopter of three lens meets that positive diopter, negative diopter and positive diopter are arranged in order , And and add aspherical application, not only make the volume of camera lens smaller, it is also ensured that preferable projection quality.
Description
Technical field
The present invention relates to projection field, more particularly to a kind of projection lens and a kind of lens assembly.
Background technology
Shooting and projection lens of the people to portable type electronic product at present requires more and more higher, and general camera lens passes through increase
Number of lenses meets the requirement of optical property, although improving image quality by more lens piece numbers, is detrimental to
The miniaturization of camera lens.Therefore, how to reduce the volume of camera lens and ensure that the image quality of camera lens turns into urgent problem to be solved.
The content of the invention
Present invention seek to address that technical problem present in prior art.Therefore, the present invention provide a kind of projection lens and
A kind of lens assembly.
The projection lens of embodiment of the present invention is from Zoom Side to reduced side sequentially by the first lens, the second lens and the 3rd
Lens form.First lens have positive diopter, and the second lens have negative diopter, and the 3rd lens have positive diopter.
In the projection lens of embodiment of the present invention, because the diopter of three lens meets positive diopter, negative diopter
And positive diopter is arranged in order , And and adds aspherical application, not only makes the volume of projection lens smaller, it is also ensured that preferably
Projection quality.
In some embodiments, the projection lens meets following relationship：
0.9≤f1/F≤1.3；
Wherein, f1 is the focal length of first lens, and F is the focal length of the projection lens.
In some embodiments, the projection lens meets following relationship：
2≤|R3+R4|/|R3-R4|≤5；
Wherein, R3 be second lens close to the radius of curvature on the surface of the Zoom Side, R4 is second lens
Radius of curvature close to the surface of the reduced side.
In some embodiments, the projection lens meets following relationship：
0.9≤f3/F≤1.9；
Wherein, f3 is the focal length of the 3rd lens, and F is the focal length of the projection lens.
In some embodiments, first lens are convex surface close to the surface of the reduced side, second lens
Surface close to the Zoom Side is concave surface.
In some embodiments, first lens, second lens and the 3rd lens are aspherical
Mirror.
In some embodiments, the material of first lens, second lens and the 3rd lens is modeling
Material.
The lens assembly of embodiment of the present invention includes the projection lens and light shield of any of the above-described embodiment.The light shield
It is adjacent with the 3rd lens and be arranged on the reduced side of the projection lens.
In the lens assembly of embodiment of the present invention, because the diopter of three lens meets positive diopter, negative diopter
And positive diopter is arranged in order , And and adds aspherical application, not only makes the volume of lens assembly smaller, it is also ensured that preferably
Projection quality.
In some embodiments, the lens assembly meets following relationship：
0.35≤F/TTL≤0.45；
Wherein, F is the focal length of the projection lens, and TTL is first lens close to the surface of the Zoom Side to institute
State the distance of light shield.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention is from combining in description of the accompanying drawings below to embodiment by change
Obtain substantially and be readily appreciated that, wherein：
Fig. 1 is the structural representation of the lens assembly of embodiment 1；
Fig. 2 is the longitudinal aberration diagram (mm) of the lens assembly of embodiment 1；
Fig. 3 is the curvature of field figure (mm) of the lens assembly of embodiment 1；
Fig. 4 is the distortion figure (%) of the lens assembly of embodiment 1；
Fig. 5 is the structural representation of the lens assembly of embodiment 2；
Fig. 6 is the longitudinal aberration diagram (mm) of the lens assembly of embodiment 2；
Fig. 7 is the curvature of field figure (mm) of the lens assembly of embodiment 2；
Fig. 8 is the distortion figure (%) of the lens assembly of embodiment 2；
Fig. 9 is the structural representation of the lens assembly of embodiment 3；
Figure 10 is the longitudinal aberration diagram (mm) of the lens assembly of embodiment 3；
Figure 11 is the curvature of field figure (mm) of the lens assembly of embodiment 3；
Figure 12 is the distortion figure (%) of the lens assembly of embodiment 3.
Embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise " are based on orientation shown in the drawings or position relationship, are for only for ease of
Description is of the invention to be described with simplified, rather than the device or element of instruction or hint meaning must be with specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for
Purpose is described, and it is not intended that instruction or hint relative importance or the implicit quantity for indicating indicated technical characteristic.
Thus, " first " is defined, the feature of " second " can be expressed or implicitly includes one or more feature.
In description of the invention, " multiple " are meant that two or more, unless otherwise specifically defined.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection or can mutually communicate；Can be joined directly together, can also be by between intermediary
Connect connected, can be connection or the interaction relationship of two elements of two element internals.For the ordinary skill of this area
For personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not directly to contact but pass through it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Sign is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are immediately below second feature and obliquely downward, or be merely representative of
Fisrt feature level height is less than second feature.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.In order to
Simplify disclosure of the invention, hereinafter the part and setting of specific examples are described.Certainly, they are only example, and
And purpose does not lie in the limitation present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, between itself not indicating discussed various embodiments and/or setting
Relation.In addition, the invention provides various specific techniques and material examples, but those of ordinary skill in the art can be with
Recognize the application of other techniques and/or the use of other materials.
Referring to Fig. 1, the projection lens of embodiment of the present invention from Zoom Side to reduced side sequentially by the first lens 10,
Two lens 20 and the 3rd lens 30 form.First lens 10 have positive diopter, and the second lens 20 have negative diopter, and the 3rd is saturating
Mirror 30 has positive diopter.
In the projection lens of embodiment of the present invention, because the diopter of three lens meets positive diopter, negative diopter
And positive diopter is arranged in order , And and adds aspherical application, not only makes the volume of projection lens smaller, it is also ensured that preferably
Projection quality.
In some embodiments, projection lens meets following relationship：
0.9≤f1/F≤1.3 (1)。
Wherein, f1 is the focal length of the first lens 10, and F is the focal length of projection lens.
Relational expression (1) is distributed to configure lens combination by the refracting power of lens element, can be again by regulation radius of curvature
And asphericity coefficient, effectively to reduce the total length of projection lens, and the aberration of system can be effectively corrected, to improve projection
The projection quality of camera lens.
In some embodiments, projection lens meets following relationship：
2≤|R3+R4|/|R3-R4|≤5 (2)。
Wherein, R3 is radius of curvature of second lens 20 close to the surface S3 of Zoom Side, and R4 is the second lens 20 close to contracting
The surface S4 of small side radius of curvature.
The shape of the second lens 20 can be limited by meeting the second lens 20 of relational expression (2) so that projection lens meet it is small
Type demand.
In some embodiments, projection lens meets following relationship：
0.9≤f3/F≤1.9 (3)。
Wherein, f3 is the focal length of the 3rd lens 30, and F is the focal length of projection lens.
Relational expression (3) is distributed to configure lens combination by the refracting power of lens element, can be again by regulation radius of curvature
And asphericity coefficient, effectively to reduce the total length of projection lens, and the aberration of system can be effectively corrected, to improve projection
The projection quality of camera lens.
In some embodiments, the first lens 10 are convex surface close to the surface S2 of reduced side, and the second lens 20 are close to putting
The surface S3 of big side is concave surface.
In this way, can so make the structure of projection lens compacter, be further advantageous to projection lens miniaturization.
In some embodiments, the first lens 10, the second lens 20 and the 3rd lens 30 are non-spherical lens.
Aspherical face shape is determined by below equation：
Wherein, Z is aspherical any point and the fore-and-aft distance of surface vertices, and r is aspherical any point to optical axis
Distance, c are vertex curvature (inverses of radius of curvature), and k is the constant of the cone, and A, B, C, D, E, F, G, H, I are asphericity coefficients.
In some embodiments, in order to add aspherical application, to reduce the lens piece number of projection lens and cost,
The material of first lens 10, the second lens 20 and the 3rd lens 30 is plastics.
The lens assembly of embodiment of the present invention includes the projection lens and light shield (mask) 40 of any of the above-described embodiment.
Light shield 40 and 30 reduced side that is adjacent and being arranged on projection lens of the 3rd lens.
So, image can be first carried on light shield 40, then gone out by projection lens projects, so as to can obtain perspective view
Picture.It is pointed out that in embodiment of the present invention, when projection lens is as pick-up lens, the position of light shield 40, which is used as, to be taken the photograph
As the position of the imaging surface of camera lens.
In some embodiments, lens assembly meets following relationship：
0.35≤F/TTL≤0.45 (5)。
Wherein, F be projection lens focal length, TTL be the first lens 10 close to Zoom Side surface S1 to light shield 40 away from
From.
Relational expression (5) describes the configuration state , And of embodiment projection lens and indicates the optical characteristics of wide-angle.
The lens assembly of embodiment of the present invention is telecentricity (telecentric) lens assembly, positioned at light shield 40 with it is described
The angle of the optical axis of chief ray and lens assembly between 3rd lens 30 is less than 3 °.The lens assembly phase of embodiment of the present invention
The benefit of more uniform Luminance Distribution can be produced for non-telecentric lens device.
Embodiment 1：
Incorporated by reference to Fig. 1~Fig. 4, in embodiment 1, lens assembly meets the condition of table 1 below~3：
Table 1
| f1(mm) | 1.248 | F(mm) | 1.068 |
| f2(mm) | -49.247 | Fno | 1.65 |
| f3(mm) | 1.898 | HFOV(deg) | 42.1 |
Table 2
| Face number | Surface type | The Trail of curvature half | Thickness | The constant of the cone | Refractive index/Abbe number |
| STO | Plane | It is infinite | 0.034 | -- | -- |
| S1 | It is aspherical | -4.45368 | 0.561 | 166.9260316 | 1.651/21.5 |
| S2 | It is aspherical | -0.70037 | 0.540 | 0.5256069 | -- |
| S3 | It is aspherical | -0.32243 | 0.426 | -4.6025875 | 1.651/21.5 |
| S4 | It is aspherical | -0.49216 | 0.035 | -5.7459974 | -- |
| S5 | It is aspherical | 0.94403 | 0.717 | -0.1885946 | 1.651/21.5 |
| S6 | It is aspherical | 3.17488 | 0.285 | 0 | -- |
| S7 | Plane | It is infinite | -- | -- | -- |
Table 3
Embodiment 2：
Incorporated by reference to Fig. 5~Fig. 8, in embodiment 2, lens assembly meets the condition of table 4 below~6：
Table 4
| f1(mm) | 1.253 | F(mm) | 1.059 |
| f2(mm) | -196.029 | Fno | 1.65 |
| f3(mm) | 1.923 | HFOV(deg) | 42.3 |
Table 5
| Face number | Surface type | The Trail of curvature half | Thickness | The constant of the cone | Refractive index/Abbe number |
| STO | Plane | It is infinite | 0.034 | -- | -- |
| S1 | It is aspherical | -4.02683 | 0.559 | 138.1783884 | 1.651/21.5 |
| S2 | It is aspherical | -0.69518 | 0.539 | 0.4606138 | -- |
| S3 | It is aspherical | -0.32349 | 0.429 | -4.3997784 | 1.651/21.5 |
| S4 | It is aspherical | -0.49054 | 0.035 | -5.8745709 | -- |
| S5 | It is aspherical | 0.95314 | 0.732 | -0.1882631 | 1.651/21.5 |
| S6 | It is aspherical | 3.14611 | 0.282 | 0 | -- |
| S7 | Plane | It is infinite | -- | -- | -- |
Table 6
Embodiment 3：
Incorporated by reference to Fig. 9~Figure 12, in embodiment 3, lens assembly meets the condition of table 7 below~9：
Table 7
| f1(mm) | 1.025 | F(mm) | 1.033 |
| f2(mm) | -1.125 | Fno | 2 |
| f3(mm) | 1.031 | HFOV(deg) | 42.8 |
Table 8
| Face number | Surface type | The Trail of curvature half | Thickness | The constant of the cone | Refractive index/Abbe number |
| STO | Plane | It is infinite | 0.06 | -- | -- |
| S1 | It is aspherical | 9.44594 | 0.701 | -212.8004353 | 1.651/21.5 |
| S2 | It is aspherical | -0.67295 | 0.285 | -6.6892768 | -- |
| S3 | It is aspherical | -0.26855 | 0.494 | -3.0326597 | 1.651/21.5 |
| S4 | It is aspherical | -0.73996 | 0.035 | -3.0964167 | -- |
| S5 | It is aspherical | 0.64467 | 0.575 | -1.1917150 | 1.651/21.5 |
| S6 | It is aspherical | 58.21493 | 0.561 | 0 | -- |
| S7 | Plane | It is infinite | -- | -- | -- |
Table 9
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means with reference to the embodiment or example description
Specific features, structure, material or feature are contained at least one embodiment or example of the present invention.In this specification
In, identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.Moreover, the specific spy of description
Sign, structure, material or spy
Point can combine in an appropriate manner in any one or more embodiments or example.
While embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that：
These embodiments can be carried out with a variety of changes, modification in the case of not departing from the principle and objective of the present invention, replace and become
Type, the scope of the present invention are limited by claim and its equivalent.
Claims (9)
1. a kind of projection lens, it is characterised in that sequentially saturating by the first lens, the second lens and the 3rd from Zoom Side to reduced side
Microscope group into；
First lens have positive diopter, and second lens have negative diopter, and the 3rd lens have positive dioptric
Degree.
2. projection lens as claimed in claim 1, it is characterised in that the projection lens meets following relationship：
0.9≤f1/F≤1.3；
Wherein, f1 is the focal length of first lens, and F is the focal length of the projection lens.
3. projection lens as claimed in claim 1, it is characterised in that the projection lens meets following relationship：
2≤|R3+R4|/|R3-R4|≤5；
Wherein, R3 is radius of curvature of second lens close to the surface of the Zoom Side, and R4 is that second lens are close
The radius of curvature on the surface of the reduced side.
4. projection lens as claimed in claim 1, it is characterised in that the projection lens meets following relationship：
0.9≤f3/F≤1.9；
Wherein, f3 is the focal length of the 3rd lens, and F is the focal length of the projection lens.
5. projection lens as claimed in claim 1, it is characterised in that first lens are close to the surface of the reduced side
Convex surface, second lens are concave surface close to the surface of the Zoom Side.
6. projection lens as claimed in claim 1, it is characterised in that first lens, second lens and described
Three lens are non-spherical lens.
7. projection lens as claimed in claim 1, it is characterised in that first lens, second lens and described
The material of three lens is plastics.
8. a kind of lens assembly, it is characterised in that including the projection lens and light shield as described in any one of claim 1~7, institute
It is adjacent with the 3rd lens and be arranged on the reduced side of the projection lens to state light shield.
9. lens assembly as claimed in claim 8, it is characterised in that the lens assembly meets following relationship：
0.35≤F/TTL≤0.45；
Wherein, F is the focal length of the projection lens, and TTL is first lens close to the surface of the Zoom Side to the light
The distance of cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610530268.5A CN107589516A (en) | 2016-07-07 | 2016-07-07 | Projection lens and lens assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610530268.5A CN107589516A (en) | 2016-07-07 | 2016-07-07 | Projection lens and lens assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107589516A true CN107589516A (en) | 2018-01-16 |
Family
ID=61045437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610530268.5A Withdrawn CN107589516A (en) | 2016-07-07 | 2016-07-07 | Projection lens and lens assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107589516A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279485A (en) * | 2018-03-09 | 2018-07-13 | 浙江舜宇光学有限公司 | Projection lens |
| CN108562999A (en) * | 2018-03-22 | 2018-09-21 | 浙江舜宇光学有限公司 | Optical imaging lens group |
| CN109991718A (en) * | 2019-02-22 | 2019-07-09 | 屏丽科技成都有限责任公司 | A kind of focal length projection lens and projector |
| CN112180539A (en) * | 2019-07-01 | 2021-01-05 | 扬明光学股份有限公司 | Optical lens and projection optical machine |
| CN112230381A (en) * | 2020-10-31 | 2021-01-15 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112394492A (en) * | 2020-12-17 | 2021-02-23 | 天津欧菲光电有限公司 | Optical system, camera module and terminal equipment |
| CN112987252A (en) * | 2021-03-05 | 2021-06-18 | 江西晶超光学有限公司 | Optical system, infrared receiving module and electronic equipment |
| WO2023216219A1 (en) * | 2022-05-13 | 2023-11-16 | 深圳市汇顶科技股份有限公司 | Infrared projection lens |
| US11893330B2 (en) | 2020-04-28 | 2024-02-06 | MiaoTech Inc. | Method and system for visualization of 3D electronic device |
-
2016
- 2016-07-07 CN CN201610530268.5A patent/CN107589516A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279485A (en) * | 2018-03-09 | 2018-07-13 | 浙江舜宇光学有限公司 | Projection lens |
| CN108562999A (en) * | 2018-03-22 | 2018-09-21 | 浙江舜宇光学有限公司 | Optical imaging lens group |
| CN108562999B (en) * | 2018-03-22 | 2023-04-07 | 浙江舜宇光学有限公司 | Optical imaging lens assembly |
| CN109991718A (en) * | 2019-02-22 | 2019-07-09 | 屏丽科技成都有限责任公司 | A kind of focal length projection lens and projector |
| CN109991718B (en) * | 2019-02-22 | 2024-04-12 | 成都九天画芯科技有限公司 | Long-focus projection lens and projector |
| CN112180539A (en) * | 2019-07-01 | 2021-01-05 | 扬明光学股份有限公司 | Optical lens and projection optical machine |
| US11893330B2 (en) | 2020-04-28 | 2024-02-06 | MiaoTech Inc. | Method and system for visualization of 3D electronic device |
| CN112230381A (en) * | 2020-10-31 | 2021-01-15 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112230381B (en) * | 2020-10-31 | 2022-01-07 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112394492A (en) * | 2020-12-17 | 2021-02-23 | 天津欧菲光电有限公司 | Optical system, camera module and terminal equipment |
| CN112987252A (en) * | 2021-03-05 | 2021-06-18 | 江西晶超光学有限公司 | Optical system, infrared receiving module and electronic equipment |
| CN112987252B (en) * | 2021-03-05 | 2023-11-07 | 江西晶超光学有限公司 | Optical system, infrared receiving module and electronic equipment |
| WO2023216219A1 (en) * | 2022-05-13 | 2023-11-16 | 深圳市汇顶科技股份有限公司 | Infrared projection lens |
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Application publication date: 20180116 |