CN207408660U - Optical lens system - Google Patents
Optical lens system Download PDFInfo
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- CN207408660U CN207408660U CN201721428477.5U CN201721428477U CN207408660U CN 207408660 U CN207408660 U CN 207408660U CN 201721428477 U CN201721428477 U CN 201721428477U CN 207408660 U CN207408660 U CN 207408660U
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- lens
- lens system
- optical lens
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Abstract
The utility model provides a kind of optical lens system.Include successively from object side：First lens, with negative refractive power, side of the object is convex surface；Second lens, with positive refracting power；3rd lens, with positive refracting power；4th lens；And the 5th lens, side of the object are aspherical, image side surface is concave surface and is aspherical, and the image side surface of the 5th lens is provided at least one point of inflexion.It configures in this way, can effectively make optical lens system integral miniaturization, reduce the error-sensitivity of optical lens system, obtain high-resolution, so as to provide the optical lens system of a kind of high-performance and miniaturization.
Description
Technical field
The utility model provides a kind of optical lens system.
Background technology
In recent years, in CCD (Charge Coupled Devices：Charge coupling device), C-MOS
(Complementary Metal Oxide Semiconductor：Complementary metal oxide semiconductor) etc. in photographing elements,
Due to the progress of miniaturization technology, and the miniaturization of pixel and the miniaturization of element itself are developing.
By using more pixels and small-sized photographing element, high image quality and the miniaturization of image can be realized.With
This for optical lens system, seeks high-performance and small-sized optical lens system simultaneously.High performance optical lens system is
Refer to such as high resolution and correct the optical lens system of aberration well.
Utility model content
Utility model will solve the problems, such as
The purpose of this utility model is that solving the above problems, the optical lens system of a kind of high-performance and miniaturization is provided
System.
The solution to the problem
The utility model provides a kind of optical lens system, includes successively from object side：First lens have negative folding
Power is penetrated, side of the object is convex surface, and image side surface is convex surface or concave surface；Second lens, with positive refracting power, side of the object is convex
Face, image side surface are concave surface；3rd lens, with positive refracting power, side of the object is concave surface, and image side surface is convex surface；4th lens,
Its side of the object is concave surface, and image side surface is convex surface；And the 5th lens, side of the object be it is aspherical, image side surface for concave surface and
To be aspherical, the image side surface of the 5th lens is provided at least one point of inflexion.Wherein, the 4th lens have positive folding
It penetrates power and the 5th lens has negative refractive power, alternatively, the 4th lens have negative refractive power and the described 5th thoroughly
Mirror has positive refracting power, alternatively, the 4th lens and the 5th lens are respectively provided with negative refractive power.
The optical lens system further includes aperture, the aperture be arranged at second lens and the 3rd lens it
Between.
First lens, second lens, the 4th lens and the 5th lens are plastic lens, described
3rd lens are glass lens.
Preferably, the optical lens system further includes electronics photo-sensitive cell, which is arranged at imaging
At face, for carrying out the imaging of object, the optical lens system meets following conditional (1) and (2).
1.5 ＜ | f1/f | ＜ 2.10 (1)
0.6 ＜ SL/TTL ＜ 0.8 (2)
Wherein, f is the focal length of optical lens system entirety, and f1 is the focal length of first lens, and SL is the light
Distance between circle and the electronics photo-sensitive cell on the optical axis of the optical lens system, TTL are first lens
Distance between side of the object and the electronics photo-sensitive cell on the optical axis.
Preferably, the focal length of first lens is -9.42mm, and the focal length of second lens is 8.04mm, described
The focal length of 3rd lens is 4.49mm, and the focal length of the 4th lens is 6.80mm, the focal lengths of the 5th lens is-
3.02mm。
The effect of utility model
According to the utility model, it can effectively make optical lens system integral miniaturization, reduce optical lens system
Error-sensitivity obtains high-resolution, so as to provide the optical lens system of a kind of high-performance and miniaturization.
Description of the drawings
Fig. 1 is the figure for the cross section structure for representing the optical lens system involved by an embodiment of the utility model.
Fig. 2 is the index path for representing the optical lens system involved by an embodiment of the utility model.
Fig. 3 is the figure for representing the filed curvature and distortion obtained by the optical lens system of present embodiment.
Fig. 4 is to represent the relative illumination figure obtained by the optical lens system of present embodiment.
Longitudinal aberration diagram when Fig. 5 is the pupil radium 0.799mm for the optical lens system for representing present embodiment.
Fig. 6 is the figure for the peak position for representing the MTF of the optical lens system of present embodiment at 25 DEG C.
Fig. 7 is pair for the peak position for representing the MTF of the optical lens system of present embodiment at 25 DEG C under two kinds of frequencies
Than figure.
Fig. 8 is the figure for the peak position for representing the MTF of the optical lens system of present embodiment at -20 DEG C.
Fig. 9 is the peak position for representing the MTF of the optical lens system of present embodiment at -20 DEG C under two kinds of frequencies
Comparison diagram.
Figure 10 is the figure for the peak position for representing the MTF of the optical lens system of present embodiment at 85 DEG C.
Figure 11 is the peak position for representing the MTF of the optical lens system of present embodiment at 85 DEG C under two kinds of frequencies
Comparison diagram.
Reference sign
L1~L5：Lens；S：Aperture；1：Optical lens system；F：Electronics photo-sensitive cell.
Specific embodiment
Hereinafter, for the optical lens system involved by the embodiment of the utility model, illustrate to use using attached drawing
The reasons why this structure and effect.In addition, the utility model is not limited to following embodiment.
Fig. 1 is the figure for the cross section structure for representing the optical lens system 1 involved by present embodiment.Fig. 2 is the optical lens
The index path of mirror system 1.
Optical lens system 1 involved by present embodiment includes having negative refractive power and object side successively from object side
Face is the first lens L1 on convex surface, the second lens L2 with positive refracting power, the 3rd lens L3 with positive refracting power, the 4th saturating
Mirror L4 and image side surface are concave surface and side of the object and image side surface are aspherical and image side surface is provided at least one point of inflexion
The 5th lens L5.
First, in order to form optical lens system small-sized and with good optical property, near object side
Position is configured with the first lens L1 with negative refractive power.The negative refractive power of optical lens system is provided as a result, helps to shorten
The total length of the optical lens system.
Moreover, the second lens L2 with positive refracting power is configured in the image side of the first lens L1.It configures in this way, energy
It is enough that effectively aberration caused by the first lens with negative refractive power is corrected, and be conducive to correct optical lens system
The aberration of system.
The 3rd lens L3 with positive refracting power is configured in the image side of the second lens L2.By the 3rd lens L3 just
Refracting power can effectively distribute the refracting power of the first lens L1, to reduce the error-sensitivity of optical lens system.
The image side of 3rd lens L3 is configured with the 4th lens L4 and image side surface is concave surface and side of the object and image side surface are equal
The 5th lens L5 of at least one point of inflexion is provided with for aspherical and image side surface.By making the image side surface of the 5th lens L5 to be recessed
Face can make the principal point (Principal Point) of optical lens system be conducive to shorten optical lens system further from imaging surface
The optics total length of system, to realize the miniaturization of camera lens.In addition, by being provided with contrary flexure on the image side surface of the 5th lens L5
Point, the light that can more efficiently suppress off-axis visual field incide into the angle of photo-sensitive cell, and can further correct from
The aberration of axis visual field.
As shown in Figure 1, it is convex surface that the first lens L1, which is side of the object, image side surface is the crescent lens of concave surface.When first
When lens L1 is the crescent lens of this convex-concave, be conducive to correct the astigmatism (Astigmatism) of optical lens system.Separately
Outside, the first lens L1 or biconvex lens.When the first lens L1 is biconvex lens, it can effectively strengthen the first lens
The refracting power configuration of L1, so that the total length of optical lens system becomes shorter.
As shown in Figure 1, the side of the object of the second lens L2 is convex surface, image side surface is concave surface.By making the second lens L2's
Image side surface is concave surface, can effectively increase the back focal length of optical lens system, with ensure optical lens system have it is enough after
Focal length places other components.In addition, by carry out the second lens L2 side of the object be convex surface and image side surface be concave surface so
Setting, can effectively correct hereby all and (PetzvalSum) of optical lens system, and optical lens can be increased
The back focal length of system places other components to ensure that optical lens system has enough back focal length, therefore the setting is preferred
's.In addition, the second lens L2 can also be the other shapes of lens with positive refracting power.
As shown in Figure 1, the side of the object of the 4th lens L4 is concave surface, image side surface is convex surface.If set to the 4th lens L4
Side of the object be concave surface and image side surface is convex surface, then for correcting the astigmatism (Astigmatism) of optical lens system more
Favorably.
As shown in Figure 1, the side of the object of the 3rd lens L3 is concave surface, image side surface is convex surface.By the way that the 3rd lens L3 is set
For side of the object be concave surface, image side surface is convex surface, can aid in the positive refracting power for strengthening the 3rd lens L3, is conducive to distribute
The refracting power of second lens L2 further shortens the optics total length of optical lens system, and reduces the mistake of optical lens system
Poor sensitivity.
As shown in Figure 1, the 4th lens L4 has positive refracting power, the 5th lens L5 has negative refractive power.In this case, shape
Cheng Yizheng, negative (Telephoto) structure of looking in the distance are conducive to shorten the back focal length of optical lens system, to reduce the optics
The optics total length of lens system.In addition, it's not limited to that for the refracting power of the 4th lens L4 and the 5th lens L5, Ke Yiwei
The lens of positive refracting power or negative refractive power.For example, when the 4th lens L4 is with negative refractive power and the 5th lens L5 is with positive refraction
During power, coma can be effectively corrected, while avoids the excessive increase of other aberrations.As the 4th lens L4 and the 5th lens L5 is equal
During with negative refractive power, it can make the principal point of optical lens system that can more efficiently shorten optical lens away from imaging surface
The optics total length of system.
Alternatively, it is also possible to be provided with aperture S between the second lens L2 and the 3rd lens L3 as shown in Figure 1.In this way,
Positive refracting power is provided by the second lens L2, and aperture S is placed in the object side close to optical lens system 1, Neng Gouyou
Shorten the optics total length of optical lens system 1 in effect ground.In addition, such configuration can make the emergent light of optical lens system 1
Therefore pupil (ExitPupil), effectively matches scanning imager (sensorCRA) away from imaging surface.On the other hand, when by light
When circle S is placed in close at the 3rd lens L3, is conducive to the characteristic of Wide-angle, contributes to distortion (Distortion) and multiplying power
The correction of chromatic aberation (Chromatic Aberration of Magnification).Such configuration can be effectively reduced
The error-sensitivity of system.Alternatively, it is also possible to which aperture S is arranged between object and the 3rd lens L3, in telecentricity characteristic
Balance is obtained between Wide-angle.
Alternatively, it is also possible to set electronics photo-sensitive cell F at imaging surface, to carry out the imaging of object.Also, optical lens
Mirror system 1 meets following conditional (1) and (2).
1.5 ＜ | f1/f | ＜ 2.10 (1)
0.6 ＜ SL/TTL ＜ 0.8 (2)
Wherein, f is the focal length of optical lens system entirety, and f1 is the focal length of first lens, and SL is the light
Distance between circle and the electronics photo-sensitive cell on the optical axis of the optical lens system, TTL are first lens
Distance between side of the object and the electronics photo-sensitive cell on the optical axis.
Further, since glass is higher than plastic cement cost, therefore from cost consideration, the lens generally use of optical lens system
Plastic material.However, if the lens of optical lens system are entirely plastic lens, focal position can be due to temperature change
Variation.On the basis of 25 DEG C of room temperature, at -20 DEG C~85 DEG C, the variation of the μ degree of 30 μ~40 can occur for focal position.Although energy
It reaches through automatic focusing come the variation of focal-position correction, but automatic focusing can cause cost increase, particularly shake in presence
Automatic focusing can be unstable when it is vibrated in the case of dynamic big unmanned plane lens, causes focal position incorrect.
Therefore, in the present embodiment, preferably make the first lens L1, the second lens L2, the 4th lens L4 and the 5th saturating
Mirror L5 is plastic lens, and the 3rd lens L3 is glass lens.Fig. 6~11 show the optical lens system of present embodiment by
The peak position variation of MTF caused by temperature.On the basis of Figure 25 DEG C, as shown in figure 8, back focus offset amount at -20 DEG C is
0.004mm, as shown in Figure 10, back focus offset amount at 85 DEG C is 0.003mm, it follows that the peak position of the MTF as caused by temperature
It puts that variation is considerably less compared with the prior art, is about the degree of the μ of 3 μ~4.
By make composition present embodiment optical lens system lens in, especially as the strong convex lens of focal power
The 3rd lens L3 be made of glass lens, can obtain even if also changing few optics there are temperature change, focal position
Lens system.Also, by making the first lens L1, the second lens L2, the 4th lens L4 and the 5th lens L5 for plastic lens,
It can be cost-effective.
According to the utility model, it can effectively make optical lens system integral miniaturization, reduce optical lens system
Error-sensitivity obtains high-resolution, so as to provide the optical lens system of a kind of high-performance and miniaturization.
The filed curvature that is obtained by the optical lens system of present embodiment of left hand view expression of Fig. 3, right part of flg represent by
The distortion that the optical lens system of present embodiment obtains.The phase that Fig. 4 expressions are obtained by the optical lens system of present embodiment
To illumination.Longitudinal aberration diagram when Fig. 5 is the pupil radium 0.799mm for the optical lens system for representing present embodiment.
The numeric data of the above embodiment described below.Mark R is the radius of curvature of each lens face, and mark D is each
The center thickness of mirror, mark Nd are the refractive index for d lines of each lens, and mark Vd is the Abbe number of each lens.
。
Claims (3)
1. a kind of optical lens system, which is characterized in that include successively from object side：
First lens, with negative refractive power, side of the object is convex surface, and image side surface is convex surface or concave surface；
Second lens, with positive refracting power, side of the object is convex surface, and image side surface is concave surface；
3rd lens, with positive refracting power, side of the object is concave surface, and image side surface is convex surface；
4th lens, side of the object are concave surface, and image side surface is convex surface；And
5th lens, side of the object are aspherical, and image side surface is concave surface and is aspherical, in the image side surface of the 5th lens
At least one point of inflexion is provided with,
Wherein, the 4th lens are with positive refracting power and the 5th lens are with negative refractive power, alternatively, the described 4th is saturating
Mirror is with negative refractive power and the 5th lens are with positive refracting power, alternatively, the 4th lens and the 5th lens are equal
With negative refractive power,
The optical lens system further includes aperture, which is arranged between second lens and the 3rd lens,
First lens, second lens, the 4th lens and the 5th lens be plastic lens, the described 3rd
Lens are glass lens.
2. optical lens system according to claim 1, which is characterized in that
Electronics photo-sensitive cell is further included, which is arranged at imaging surface, for carrying out the imaging of object,
The optical lens system meets following conditional (1) and (2),
1.5 ＜ | f1/f | ＜ 2.10 (1)
0.6 ＜ SL/TTL ＜ 0.8 (2)
Wherein, f is the focal length of optical lens system entirety,
F1 is the focal length of first lens,
Distances of the SL between the aperture and the electronics photo-sensitive cell on the optical axis of the optical lens system,
TTL is the distance on the optical axis between the side of the object of first lens and the electronics photo-sensitive cell.
3. optical lens system according to claim 1, which is characterized in that
The focal length of first lens is -9.42mm, and the focal length of second lens is 8.04mm, the focal length of the 3rd lens
It is 4.49mm, the focal length of the 4th lens is 6.80mm, and the focal length of the 5th lens is -3.02mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721428477.5U CN207408660U (en) | 2017-10-31 | 2017-10-31 | Optical lens system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721428477.5U CN207408660U (en) | 2017-10-31 | 2017-10-31 | Optical lens system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207408660U true CN207408660U (en) | 2018-05-25 |
Family
ID=62408466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721428477.5U Active CN207408660U (en) | 2017-10-31 | 2017-10-31 | Optical lens system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207408660U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624747A (en) * | 2019-02-27 | 2020-09-04 | 株式会社腾龙 | Optical imaging system and imaging device |
| WO2021159406A1 (en) * | 2020-02-13 | 2021-08-19 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Imaging lens, camera module and imaging device |
-
2017
- 2017-10-31 CN CN201721428477.5U patent/CN207408660U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624747A (en) * | 2019-02-27 | 2020-09-04 | 株式会社腾龙 | Optical imaging system and imaging device |
| CN111624747B (en) * | 2019-02-27 | 2024-01-12 | 株式会社腾龙 | Optical imaging system and imaging device |
| WO2021159406A1 (en) * | 2020-02-13 | 2021-08-19 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Imaging lens, camera module and imaging device |
| CN115244445A (en) * | 2020-02-13 | 2022-10-25 | Oppo广东移动通信有限公司 | Imaging lens, camera module, and imaging apparatus |
| CN115244445B (en) * | 2020-02-13 | 2023-11-03 | Oppo广东移动通信有限公司 | Imaging lens, camera module and imaging device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180516 Address after: 518052 Guangdong Shenzhen Nanshan District Taoyuan Street Pingshan road Valley two 3 3 102 Patentee after: Shenzhen Bo son Photoelectric Technology Co., Ltd. Address before: 518000 No. 3039 Baoan North Road, Luohu District, Shenzhen, Guangdong. Patentee before: Huo Haoyang |