CN206563841U - A kind of small aberration optical lens - Google Patents
A kind of small aberration optical lens Download PDFInfo
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- CN206563841U CN206563841U CN201720186857.6U CN201720186857U CN206563841U CN 206563841 U CN206563841 U CN 206563841U CN 201720186857 U CN201720186857 U CN 201720186857U CN 206563841 U CN206563841 U CN 206563841U
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Abstract
The utility model discloses a kind of small aberration optical lens, include the first lens group, diaphragm, the second lens group and the 3rd lens group successively from the object side to the image side, first lens group has positive light coke, second lens group has negative power and including at least one piece of balsaming lens with positive light coke, and the 3rd lens group has positive light coke.Small aberration optical lens of the present utility model are by setting the first lens group, diaphragm, the second lens group and the 3rd lens group, so that optical lens is while high-resolution is realized, volume is more compact, distorts smaller, cost is lower, can better meet the demand observed for small field of view.Balsaming lens of the present utility model effectively reduces imaging aberrations, makes camera lens color rendition accurate.Overall optical texture is the modification of classical Cook lens, being capable of effectively spherical aberration corrector and the curvature of field, and effectively control optical distortion, it is ensured that distortion is small while high resolution.
Description
Technical field
The utility model is related to optical lens technical field, more particularly to a kind of small aberration optical lens.
Background technology
With the continuous progress of auto industry active safety, more and more higher is required to vehicle-mounted front view lens.Due to front-view mirror
Head is applied to lane shift in automobile ADAS, in terms of the monitoring of road surface, does not require nothing more than resolving power height to picture, also to ensure picture
Distorting transformation degree is small.In addition, part drive recorder needs to shoot the less camera lens of field range, to avoid in record picture
There is unnecessary object, while improving the ability of identification object detail.
Existing Chinese patent literature CN105353499A is using six optical glass lens, though various aspects of performance is preferably,
But cost is of a relatively high and its optics overall length is relatively long, distort larger.In addition, another Chinese patent literature CN105629425A
Although using five optical glass lens, its eyeglass is all using high-refractivity and low-dispersion material, and price is of a relatively high, and this
Patent takes into account infrared band imaging performance because needing, and causes visual light imaging hydraulic performance decline.Therefore, a kind of small distortion how is designed
Optical lens, makes it while low-angle large aperture high resolution is realized, can be effectively compressed camera lens volume, reduce picture mistake
True degree and to reduce cost be the problem of those skilled in the art need solution.
Utility model content
The purpose of this utility model is to overcome weak point of the prior art there is provided a kind of small aberration optical lens, is had
Body volume is more compact, and distort smaller, the more low feature of cost.
The purpose of this utility model is achieved through the following technical solutions：
A kind of small aberration optical lens, include the first lens group, diaphragm, the second lens group and the successively from the object side to the image side
Three lens groups, first lens group has positive light coke, and second lens group has negative power and including at least one piece
Balsaming lens with positive light coke, the 3rd lens group has positive light coke；
The effective focal length f of the small aberration optical lens and its optics overall length L meets following condition formula：1.2<L/f<
1.8。
As a kind of preferred scheme of the utility model, it is saturating that first lens group includes first with positive light coke
Mirror, the focal length value f1 of first lens meets formula below：0.7<f1/f<1.6.
As a kind of preferred scheme of the utility model, under the refractive index Nd1 and Abbe number Vd1 of first lens are met
Face condition formula：Nd1 >=1.8, Vd1 >=30.
As a kind of preferred scheme of the utility model, first lens are falcate spherical glass lens
As a kind of preferred scheme of the utility model, second lens group includes：Second with negative power is saturating
Mirror, the 3rd lens with positive light coke and the 4th lens with negative power, the 3rd lens and the 4th lens
Balsaming lens or second lens with positive light coke are combined into the 3rd lens combination into positive light coke
Balsaming lens.
As a kind of preferred scheme of the utility model, the whole focal length value f2 of second lens group meets following condition
Formula：-3<f2/f<-0.6.
As a kind of preferred scheme of the utility model, it is saturating that the 3rd lens group includes the with positive light coke the 5th
Mirror, the focal length value f5 of the 5th lens meets following condition formula：0.6<f5/f<3.
As a kind of preferred scheme of the utility model, under the refractive index Nd5 and Abbe number Vd5 of the 5th lens are met
Face condition formula：Nd5 >=1.8, Vd5 >=30.
As a kind of preferred scheme of the utility model, total visual field scope FOV of the small aberration optical lens is met
Condition formula below：15°≤FOV≤45°.
As a kind of preferred scheme of the utility model, the F-number Fno of the small aberration optical lens meets lower noodles
Part formula：Fno≤2.0.
Compared with prior art, the utility model has advantages below：
Small aberration optical lens of the present utility model are by setting the first lens group, diaphragm, the second lens group and the 3rd saturating
Microscope group so that optical lens is while high-resolution is realized, volume is more compact, distorts smaller, cost is lower, can be more preferable
Meet the demand observed for small field of view.
Brief description of the drawings
Fig. 1 is the structure chart of the small aberration optical lens of the embodiment of the utility model one；
Fig. 2 be Fig. 1 in small aberration optical lens MTF curve figure；
Fig. 3 be Fig. 1 in small aberration optical lens point range figure；
Fig. 4 be Fig. 1 in small aberration optical lens the curvature of field and distortion figure；
Fig. 5 is the structure chart of the small aberration optical lens of another embodiment of the utility model；
Fig. 6 be Fig. 5 in small aberration optical lens MTF curve figure；
Fig. 7 be Fig. 5 in small aberration optical lens point range figure；
Fig. 8 be Fig. 5 in small aberration optical lens the curvature of field and distortion figure；
Embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Better embodiment of the present utility model is given in accompanying drawing.But, the utility model can come in many different forms
Realize, however it is not limited to embodiments described herein.On the contrary, the purpose for providing these embodiments is to make to this practicality newly
It is more thorough comprehensive that the disclosure of type understands.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left side ",
For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is herein to be in term used in the description of the present utility model
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " bag
Include the arbitrary and all combination of one or more related Listed Items.
As shown in figure 1, the structure chart of the small aberration optical lens 10 for the embodiment of the utility model one.
A kind of small aberration optical lens 10, altogether containing five pieces of glass lens, specifically, including successively from the object side to the image side
First lens group L1, diaphragm stop, the second lens group L2 and the 3rd lens group L3, the first lens group L1 have positive light coke, the
Two lens group L2 have negative power and including at least one piece of balsaming lens with positive light coke, and the 3rd lens group L3 has just
Focal power.The effective focal length f of small aberration optical lens 10 and its optics overall length L meets following condition formula：1.2<L/f<1.8.
Further, the first lens group L1, which includes the first lens G1, the first lens G1 with positive light coke, includes first
Face S1 and the second face S2, diaphragm stop are the 3rd face S3.First lens G1 focal length value f1 meets formula below：0.7<f1/f<
1.6.First lens G1 refractive index Nd1 and Abbe number Vd1 meets following condition formula：Nd1 >=1.8, Vd1 >=30.In this reality
Apply in example, the first lens G1 is falcate spherical glass lens
Second lens group L2 includes：The second lens G2 with negative power, the 3rd lens G3 with positive light coke with
The 4th lens G4 with negative power, the 3rd lens G3 and the 4th lens G4 are combined into balsaming lens or the second lens G2
The balsaming lens with positive light coke is combined into the 3rd lens G3.
Second lens G2 is concave-concave spherical glass lens, and it includes fourth face S4 and the 5th face S5, the 3rd lens G3 and the
Four lens G4 are combined into a balsaming lens, and it includes the 6th face S6, cemented surface S7 and octahedral S8.Second lens group L2's is whole
Body focal length value f2 meets following condition formula：-3<f2/f<-0.6.
3rd lens group L3 includes the 5th lens G5 with positive light coke, and it is falcate spherical glass lens, the 5th
Lens G5 focal length value f5 meets following condition formula：0.6<f5/f<3.5th lens G5 refractive index Nd5 and Abbe number Vd5
Meet following condition formula：Nd5 >=1.8, Vd5 >=30.
5th lens G5 includes the 9th face S9 and the tenth face S10, and the 5th lens G5 the tenth face S10 rear is set gradually
There are optical filter 100 and imaging surface 200, optical filter 100 includes the tenth one side (S11), the 12nd face (S12).
Total visual field scope FOV of small aberration optical lens 10 meets following condition formula：15 °≤FOV≤45 °, its light
Learn distortion percentage absolute value≤1%.The F-number Fno of small aberration optical lens meets following condition formula：Fno≤2.0.
The parameter of small aberration optical lens 10 of the present utility model is shown in Table 1：
In the small said structure scheme of aberration optical lens 10 of the present utility model, balsaming lens effectively reduces imaging color
Difference, makes camera lens color rendition accurate.Overall optical texture is the modification of classical Cook lens, being capable of effectively spherical aberration corrector and field
Song, and effectively control optical distortion, it is ensured that distortion is small while high resolution.
The design parameter such as table 2 below of the small aberration optical lens 10 of the embodiment of the utility model one：
| Number in face | Type | Radius | Thickness | Optical material | Half bore |
| OBJ | Object plane | infinity | 1200 | Air | 312 |
| S1 | Standard | 8.35 | 2.5 | H-ZLAF4 | 3.3 |
| S2 | Standard | 28.69 | 0.25 | Air | 2.6 |
| S3(Stop) | Standard | infinity | 2.55 | Air | 2.5 |
| S4 | Standard | -9.48 | 0.6 | H-ZF88 | 2.2 |
| S5 | Standard | 11.15 | 0.35 | Air | 2.2 |
| S6 | Standard | -35.06 | 2.3 | H-ZLAF4 | 2.2 |
| S7 | Standard | -5.32 | 0.9 | H-F2 | 2.5 |
| S8 | Standard | -10.92 | 0.1 | Air | 2.6 |
| S9 | Standard | 9.17 | 3 | H-ZLAF4 | 2.8 |
| S10 | Standard | 16.15 | 0.5 | Air | 2.7 |
| S11 | Standard | infinity | 0.7 | BK7 | 2.7 |
| S12 | Standard | infinity | 5.05 | Air | 2.7 |
| Image | Standard | infinity | Air | 3.2 |
Fig. 2-Fig. 4 is the optical performance curve figure of the small aberration optical lens 10 of the embodiment of the utility model one, and Fig. 2 is it
MTF curve figure, Fig. 3 is its point range figure, and Fig. 4 is its curvature of field and distortion figure.
It can be seen that small aberration optical lens 10 of the present utility model have good optical property from Fig. 2-Fig. 4,
While realizing high-resolution, volume is more compact, distorts smaller, cost is lower, can better meet for small field of view observation
Demand.
As shown in figure 5, the structure chart of the small aberration optical lens 20 for another embodiment of the utility model, from object space to picture
Fang Yici includes the first lens group L1, diaphragm stop, the second lens group L2 and the 3rd lens group L3, and the first lens group L1 includes tool
The first the lens G1, the first lens G1 for having positive light coke includes the first face S1 and the second face S2, diaphragm stop are the 3rd face S3.The
Two lens group L2 include be combined into by the second lens G2 and the 3rd lens G3 the balsaming lens with positive light coke, with negative light
4th lens G4 of focal power；Second lens G2 and the 3rd lens G3 are combined into a balsaming lens, and it includes fourth face S4, gluing
Face S5 and the 6th face S6, the 4th lens G4 include the 7th face S7 and octahedral S8, and the 3rd lens group L3 includes having positive light coke
The 5th lens G5, its be biconvex spherical glass lens, the 5th lens G5 include the 9th face S9 and the tenth face S10.5th is saturating
Mirror G5 the tenth face S10 rear is disposed with optical filter 100 and imaging surface 200, and optical filter 100 includes the tenth one side
(S11), the 12nd face (S12).
The parameter of small aberration optical lens 20 is shown in Table 3：
In the small said structure scheme of aberration optical lens 20 of the present utility model, balsaming lens effectively reduces imaging color
Difference, makes camera lens color rendition accurate.Overall optical texture is the modification of classical Cook lens, being capable of effectively spherical aberration corrector and field
Song, and effectively control optical distortion, it is ensured that distortion is small while high resolution.
The design parameter such as table 4 below of small aberration optical lens 20：
| Number in face | Type | Radius | Thickness | Optical material | Half bore |
| OBJ | Object plane | infinity | 1200 | Air | 256 |
| S1 | Standard | 11.72 | 2.8 | H-ZLAF4 | 4.3 |
| S2 | Standard | 30.85 | 0.8 | Air | 3.7 |
| S3(Stop) | Standard | infinity | -0.6 | Air | 3.35 |
| S4 | Standard | 9.86 | 2.5 | H-ZF88 | 3.4 |
| S5 | Standard | 4.79 | 1.8 | H-ZLAF68 | 2.7 |
| S6 | Standard | 13.05 | 0.3 | Air | 2.3 |
| S7 | Standard | infinity | 1.4 | H-ZF52A | 2.3 |
| S8 | Standard | 5.34 | 2.45 | Air | 2.1 |
| S9 | Standard | 11.05 | 2.3 | H-ZLAF55 | 3 |
| S10 | Standard | -24.42 | 0.5 | Air | 3.2 |
| S11 | Standard | infinity | 0.7 | BK7 | 3.2 |
| S12 | Standard | infinity | 5.2 | Air | 3.3 |
| Image | Standard | infinity | Air | 3.3 |
Fig. 6-Fig. 8 is the optical performance curve figure of the small aberration optical lens 20 of another embodiment of the utility model, and Fig. 6 is
Its MTF curve figure, Fig. 7 is its point range figure, and Fig. 8 is its curvature of field and distortion figure.
It can be seen that small aberration optical lens 20 of the present utility model have good optical property from Fig. 6-Fig. 8,
While realizing high-resolution, volume is more compact, distorts smaller, cost is lower, can better meet for small field of view observation
Demand.
Compared with prior art, the utility model has advantages below：
Small aberration optical lens of the present utility model are by setting the first lens group L1, diaphragm stop, the second lens group L2
With the 3rd lens group L3 so that optical lens is while high-resolution is realized, volume is more compact, distort smaller, cost is lower,
The demand observed for small field of view can be better met.
Embodiment described above only expresses several embodiments of the present utility model, and it describes more specific and detailed
Carefully, but can not therefore and be interpreted as the limitation to the utility model the scope of the claims.It should be pointed out that for the general of this area
For logical technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these are all
Belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of small aberration optical lens, include the first lens group, diaphragm, the second lens group and the 3rd successively from the object side to the image side
Lens group, it is characterised in that first lens group has a positive light coke, second lens group has negative power and at least
Comprising one piece of balsaming lens with positive light coke, the 3rd lens group has positive light coke；
The effective focal length f of the small aberration optical lens and its optics overall length L meets following condition formula：1.2<L/f<1.8.
2. small aberration optical lens according to claim 1, it is characterised in that first lens group includes having positive light
First lens of focal power, the focal length value f1 of first lens meets formula below：0.7<f1/f<1.6.
3. small aberration optical lens according to claim 2, it is characterised in that the refractive index Nd1 of first lens with
Abbe number Vd1 meets following condition formula：Nd1 >=1.8, Vd1 >=30.
4. small aberration optical lens according to claim 2, it is characterised in that first lens are falcate sphere glass
Glass lens.
5. small aberration optical lens according to claim 1, it is characterised in that second lens group includes：With negative
Second lens of focal power, the 3rd lens with positive light coke and the 4th lens with negative power, the 3rd lens
With the 4th lens combination into the balsaming lens with positive light coke or second lens and the 3rd lens combination into
Balsaming lens with positive light coke.
6. small aberration optical lens according to claim 5, it is characterised in that the whole focal length value of second lens group
F2 meets following condition formula：-3<f2/f<-0.6.
7. small aberration optical lens according to claim 1, it is characterised in that the 3rd lens group includes having positive light
5th lens of focal power, the focal length value f5 of the 5th lens meets following condition formula：0.6<f5/f<3.
8. small aberration optical lens according to claim 7, it is characterised in that the refractive index Nd5 of the 5th lens with
Abbe number Vd5 meets following condition formula：Nd5 >=1.8, Vd5 >=30.
9. small aberration optical lens according to claim 1, it is characterised in that total visual field of the small aberration optical lens
Angular region FOV meets following condition formula：15°≤FOV≤45°.
10. small aberration optical lens according to claim 1, it is characterised in that the aperture of the small aberration optical lens
Number Fno meets following condition formula：Fno≤2.0.
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| CN201720186857.6U CN206563841U (en) | 2017-02-28 | 2017-02-28 | A kind of small aberration optical lens |
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|---|---|---|---|
| CN201720186857.6U CN206563841U (en) | 2017-02-28 | 2017-02-28 | A kind of small aberration optical lens |
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| CN206563841U true CN206563841U (en) | 2017-10-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11194126B2 (en) | 2018-03-02 | 2021-12-07 | Largan Precision Co., Ltd. | Electronic device |
| US11385438B2 (en) | 2015-04-29 | 2022-07-12 | Largan Precision Co., Ltd. | Imaging lens system, image capturing device and electronic device |
-
2017
- 2017-02-28 CN CN201720186857.6U patent/CN206563841U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11385438B2 (en) | 2015-04-29 | 2022-07-12 | Largan Precision Co., Ltd. | Imaging lens system, image capturing device and electronic device |
| US11762170B2 (en) | 2015-04-29 | 2023-09-19 | Largan Precision Co., Ltd. | Imaging lens system, image capturing device and electronic device |
| US11194126B2 (en) | 2018-03-02 | 2021-12-07 | Largan Precision Co., Ltd. | Electronic device |
| US11762173B2 (en) | 2018-03-02 | 2023-09-19 | Largan Precision Co., Ltd. | Electronic device |
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