CN117270163A - Image pickup optical lens - Google Patents
Image pickup optical lens Download PDFInfo
- Publication number
- CN117270163A CN117270163A CN202311274488.2A CN202311274488A CN117270163A CN 117270163 A CN117270163 A CN 117270163A CN 202311274488 A CN202311274488 A CN 202311274488A CN 117270163 A CN117270163 A CN 117270163A
- Authority
- CN
- China
- Prior art keywords
- lens
- imaging optical
- refractive power
- focal length
- optical lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 73
- 238000003384 imaging method Methods 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000005357 flat glass Substances 0.000 claims description 4
- 102220616555 S-phase kinase-associated protein 2_E48R_mutation Human genes 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 238000012634 optical imaging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention provides an imaging optical lens, which comprises a first lens with negative refractive power; a second lens element with positive refractive power; a third lens element with negative refractive power; a fourth lens element with positive refractive power; a fifth lens element with positive refractive power; a sixth lens element with negative refractive power; the imaging optical lens satisfies the following relationship: R1/TTL is more than or equal to 0.8 and less than or equal to 0.9; -1.6.ltoreq.f1/f.ltoreq.1.4; -2.5.ltoreq.f6/f.ltoreq.2.2; the focal length of the first lens is f1, the curvature of the object side surface of the first lens is R1, the total optical length of the image pickup optical lens is TTL, the focal length of the whole image pickup optical lens is f, and the focal length of the sixth lens is f6. The imaging optical lens has the advantages of small volume and low production cost by optimizing the structure and parameters of six lenses on the premise of realizing high imaging quality, and can meet the design requirements of large aperture and miniaturization.
Description
Technical Field
The invention relates to the technical field of optical lenses, in particular to an imaging optical lens.
Background
With the development of imaging technology, imaging optical lenses are widely used in various electronic products, such as smart phones, digital cameras, monitoring, etc. For convenience of carrying, the electronic products are increasingly required to be lighter and thinner, so that miniaturized imaging optical lenses with good imaging quality are apparently the mainstream of the current market.
The invention patent application with the publication number of CN112379508A discloses an optical system, an image capturing module and electronic equipment. The optical system includes, in order from an object side to an image side: a first lens element with positive refractive power; a second lens element with refractive power; a third lens element with negative refractive power; a fourth lens element with positive refractive power, the third lens element being cemented with the fourth lens element; a fifth lens element with positive refractive power; and the optical system satisfies the following conditional expression: FNO is less than or equal to 1.9; wherein FNO is the f-number of the optical system.
As described above, the optical system including five lenses, in which FNO is equal to or less than 1.9, cannot meet the design requirements of large aperture, ultra-thin, and small size, and therefore, it is necessary to provide an imaging optical lens having good optical performance and meeting the design requirements of large aperture, ultra-thin, and small size.
Disclosure of Invention
In view of the above, the present invention provides an imaging optical lens with good optical performance, which can meet the requirements of large aperture and miniaturized design.
The technical scheme of the invention is realized as follows:
the invention provides an image pickup optical lens, which sequentially comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, a sixth lens and plate glass from the object side to the image side, wherein,
the first lens element with negative refractive power;
the second lens element with positive refractive power;
the third lens element with negative refractive power;
the fourth lens element with positive refractive power;
the fifth lens element with positive refractive power;
the sixth lens element with negative refractive power;
the imaging optical lens satisfies the following relationship:
0.8≤R1/TTL≤0.9；
-1.6≤f1/f≤-1.4；
-2.5≤f6/f≤-2.2；
the focal length of the first lens is f1, the curvature of the object side surface of the first lens is R1, the total optical length of the image pickup optical lens is TTL, the focal length of the whole image pickup optical lens is f, and the focal length of the sixth lens is f6.
On the basis of the above technical solution, preferably, the object side surface of the first lens is a convex surface, and the image side surface is a concave surface;
the object side surface of the second lens is a convex surface, and the image side surface is a convex surface;
the object side surface of the third lens is a concave surface, and the image side surface is a concave surface;
the object side surface of the fourth lens is a convex surface, and the image side surface is a convex surface;
the object side surface of the fifth lens is a convex surface, and the image side surface is a convex surface;
the sixth lens element has a concave object-side surface at the center of the optical axis, and a concave image-side surface.
On the basis of the above technical solution, it is preferable that the image pickup optical lens satisfies the following relational expression:
0.7≤f2/f5≤0.8；
-1.4≤f3/f4≤-1.3；
wherein f2 is the second lens focal length, f3 is the third lens focal length, f4 is the fourth lens focal length, and f5 is the fifth lens focal length.
On the basis of the above technical solution, it is preferable that the image pickup optical lens satisfies the following relational expression:
1.6≤(R1+R2)/(R1-R2)≤1.65；
-5.0≤(R11+R12)/(R11-R12)≤-4.0；
wherein, R1 is the radius of curvature of the first lens object-side surface, R2 is the radius of curvature of the first lens image-side surface, R11 is the radius of curvature of the sixth lens object-side surface, and R12 is the radius of curvature of the sixth lens image-side surface.
On the basis of the above technical solution, it is preferable that the image pickup optical lens satisfies the following relational expression:
1.8<Fno<2.2；
FOV>70°；
wherein FNo is the f-number of the imaging optical lens, and FOV is the full field angle of the imaging optical lens.
On the basis of the technical scheme, preferably, the third lens and the fourth lens are combined into a cemented lens.
On the basis of the technical proposal, the first lens, the second lens, the third lens, the fourth lens and the fifth lens are preferably spherical lenses, wherein,
the material of the first lens is LAKN7;
the material of the second lens is N-LASF43;
the material of the third lens is SFL57;
the material of the fourth lens is LAK31;
the fifth lens is made of LAKN6.
On the basis of the above technical solution, preferably, the sixth lens is an aspherical lens, the material of the sixth lens is resin, and the resin is PMMA or E48R.
Compared with the prior art, the imaging optical lens has the following beneficial effects:
(1) By optimizing the structure and parameters of the six lenses, the design requirements of large aperture and miniaturization can be met, the light incoming quantity of the lens can be obviously increased, so that shooting and imaging are clearer, the lens has the advantage of small volume on the premise of realizing high imaging quality, is more suitable for small mobile terminals such as mobile phones and the like and equipment such as cameras and the like, and has lower production cost;
(2) The third lens and the fourth lens of the photographing optical lens are combined into a cemented lens, so that the volume of the lens can be reduced, the lens is convenient to install, the advantages of short focal length and large magnification are achieved, chromatic aberration can be further corrected, and better imaging quality is achieved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an optical system diagram of an imaging optical lens of the present invention;
FIG. 2 is an MTF diagram of an imaging optical lens of the present invention;
FIG. 3 is a field curvature of an imaging optical lens of the present invention;
FIG. 4 is a point diagram of an imaging optical lens of the present invention;
FIG. 5 is a relative illuminance diagram of an imaging optical lens of the present invention;
in the figure: 1. a first lens; l2, a second lens; l3, a third lens; l4, a fourth lens; l5, a fifth lens; l6, sixth lens; ST and a diaphragm; PL, plate glass.
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
As shown in fig. 1, the image pickup optical lens of the present invention includes, in order from an object side to an image side, a first lens L1, a second lens L2, a stop ST, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a plate glass PL, wherein,
the first lens element L1 with negative refractive power; the second lens element L2 with positive refractive power; the third lens element L3 with negative refractive power; the fourth lens element L4 with positive refractive power; the fifth lens element L5 with positive refractive power; the sixth lens element L6 with negative refractive power;
the imaging optical lens satisfies the following relationship:
0.8≤R1/TTL≤0.9；
-1.6≤f1/f≤-1.4；
-2.5≤f6/f≤-2.2；
the focal length of the first lens L1 is f1, the curvature of the object side surface of the first lens L1 is R1, the total optical length of the imaging optical lens is TTL, the focal length of the entire imaging optical lens is f, and the focal length of the sixth lens L6 is f6.
The object side surface of the first lens L1 is a convex surface, and the image side surface is a concave surface; the object side surface of the second lens element L2 is convex, and the image side surface is convex; the object side surface of the third lens element L3 is a concave surface, and the image side surface is a concave surface; the fourth lens element L4 has a convex object-side surface and a convex image-side surface; the fifth lens element L5 has a convex object-side surface and a convex image-side surface; the sixth lens element L6 has a concave object-side surface at the center of the optical axis and a concave image-side surface.
The imaging optical lens satisfies the following relationship:
0.7≤f2/f5≤0.8；
-1.4≤f3/f4≤-1.3；
wherein f2 is the focal length of the second lens L2, f3 is the focal length of the third lens L3, f4 is the focal length of the fourth lens L4, and f5 is the focal length of the fifth lens L5.
The imaging optical lens satisfies the following relationship:
1.6≤(R1+R2)/(R1-R2)≤1.65；
-5.0≤(R11+R12)/(R11-R12)≤-4.0；
wherein, R1 is the radius of curvature of the object-side surface of the first lens element L1, R2 is the radius of curvature of the image-side surface of the first lens element L1, R11 is the radius of curvature of the object-side surface of the sixth lens element L6, and R12 is the radius of curvature of the image-side surface of the sixth lens element L6.
The imaging optical lens satisfies the following relationship:
1.8<Fno<2.2；FOV>70°；
wherein FNo is the f-number of the imaging optical lens, and FOV is the full field angle of the imaging optical lens.
The third lens L3 and the fourth lens L4 are combined into a cemented lens.
The first lens L1, the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 are all spherical lenses;
wherein the material of the first lens L1 is LAKN7; the material of the second lens L2 is N-LASF43; the material of the third lens L3 is SFL57; the material of the fourth lens L4 is LAK31; the material of the fifth lens L5 is LAKN6.
The sixth lens L6 is an aspherical lens, the material of the sixth lens L6 is resin, and the resin is PMMA or E48R.
In this embodiment, the design parameters of the imaging optical lens system are shown in table one:
table one:
the aspherical parameters of the sixth lens L6 are shown in table two:
and (II) table:
in the present embodiment, the image pickup optical lens system satisfies the following relational equation:
R1/TTL＝0.84；
f1/f＝-1.5；
f6/f＝-2.2；
f2/f5＝0.778；
f3/f4＝-1.323；
1.6≤(R1+R2)/(R1-R2)≤1.65；
-5.0≤(R11+R12)/(R11-R12)≤-4.0；
wherein f is the total focal length of the lens assembly, f1 is the focal length of the first lens element L1, f2 is the focal length of the second lens element L2, f3 is the focal length of the third lens element L3, f4 is the focal length of the fourth lens element L4, f5 is the focal length of the fifth lens element L5, f6 is the focal length of the sixth lens element L6, R1 is the radius of curvature of the object-side surface of the first lens element L1, R2 is the radius of curvature of the image-side surface of the first lens element L1, R11 is the radius of curvature of the object-side surface of the sixth lens element L6, and R12 is the radius of curvature of the image-side surface of the sixth lens element L6.
In the above embodiment, the optical performance of the lens is shown in fig. 2 to 5, and the MTF function, field curvature, point list and relative illuminance of the lens all meet the related design requirements.
The lens adopts a six-lens structure, so that the system volume and cost are effectively reduced while the high imaging quality is ensured;
the lens adopts a group of cemented lenses, namely a third lens and a fourth lens, which can further correct chromatic aberration while reducing the volume of the system;
in the MTF function, the MTF value of the central view field is larger than 0.5 at 120lp/mm, and the MTF value of the edge view field is larger than 0.3 at 170lp/mm, so that the optical imaging quality is good, and the optical imaging sensor can be applied to a high-resolution imaging sensor.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. The image pickup optical lens is characterized by comprising a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, a sixth lens and plate glass in sequence from the object side to the image side, wherein,
the first lens element with negative refractive power;
the second lens element with positive refractive power;
the third lens element with negative refractive power;
the fourth lens element with positive refractive power;
the fifth lens element with positive refractive power;
the sixth lens element with negative refractive power;
the imaging optical lens satisfies the following relation:
0.8≤R1/TTL≤0.9；
-1.6≤f1/f≤-1.4；
-2.5≤f6/f≤-2.2；
the focal length of the first lens is f1, the curvature of the object side surface of the first lens is R1, the total optical length of the image pickup optical lens is TTL, the focal length of the whole image pickup optical lens is f, and the focal length of the sixth lens is f6.
2. The imaging optical lens according to claim 1, wherein: the object side surface of the first lens is a convex surface, and the image side surface is a concave surface;
the object side surface of the second lens is a convex surface, and the image side surface is a convex surface;
the object side surface of the third lens is a concave surface, and the image side surface is a concave surface;
the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface;
the object side surface of the fifth lens is a convex surface, and the image side surface is a convex surface;
the object side surface of the sixth lens at the center of the optical axis is a concave surface, and the image side surface is a concave surface.
3. The imaging optical lens according to claim 1, wherein: the imaging optical lens satisfies the following relation:
0.7≤f2/f5≤0.8；
-1.4≤f3/f4≤-1.3；
wherein f2 is the second lens focal length, f3 is the third lens focal length, f4 is the fourth lens focal length, and f5 is the fifth lens focal length.
4. The imaging optical lens according to claim 1, wherein: the imaging optical lens satisfies the following relation:
1.6≤(R1+R2)/(R1-R2)≤1.65；
-5.0≤(R11+R12)/(R11-R12)≤-4.0；
wherein R1 is a radius of curvature of the first lens object-side surface, R2 is a radius of curvature of the first lens image-side surface, R11 is a radius of curvature of the sixth lens object-side surface, and R12 is a radius of curvature of the sixth lens image-side surface.
5. The imaging optical lens according to claim 1, wherein: the imaging optical lens satisfies the following relation:
1.8<Fno<2.2；
FOV>70°；
wherein FNO is the f-number of the imaging optical lens, and FOV is the full field angle of the imaging optical lens.
6. The imaging optical lens according to claim 1, wherein: the third lens and the fourth lens are combined into a cemented lens.
7. The imaging optical lens according to claim 1, wherein: the first lens, the second lens, the third lens, the fourth lens and the fifth lens are all spherical lenses, wherein,
the material of the first lens is LAKN7;
the material of the second lens is N-LASF43;
the material of the third lens is SFL57;
the fourth lens is made of LAK31;
the fifth lens is made of LAKN6.
8. The imaging optical lens according to claim 1, wherein: the sixth lens is an aspherical lens.
9. The imaging optical lens according to claim 8, wherein: the sixth lens is made of resin, and the resin is PMMA or E48R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311274488.2A CN117270163B (en) | 2023-09-28 | 2023-09-28 | Image pickup optical lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311274488.2A CN117270163B (en) | 2023-09-28 | 2023-09-28 | Image pickup optical lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117270163A true CN117270163A (en) | 2023-12-22 |
| CN117270163B CN117270163B (en) | 2024-05-28 |
Family
ID=89220965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311274488.2A Active CN117270163B (en) | 2023-09-28 | 2023-09-28 | Image pickup optical lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117270163B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111538140A (en) * | 2020-07-13 | 2020-08-14 | 瑞声通讯科技(常州)有限公司 | Image pickup optical lens |
| CN111983779A (en) * | 2019-05-24 | 2020-11-24 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
| CN112154362A (en) * | 2019-07-10 | 2020-12-29 | 深圳市大疆创新科技有限公司 | Optical imaging system and electronic device |
| CN114252975A (en) * | 2020-09-21 | 2022-03-29 | 光燿科技股份有限公司 | Optical imaging lens |
| CN115079382A (en) * | 2022-08-19 | 2022-09-20 | 杭州德适生物科技有限公司 | Monitoring lens, camera equipment and head-mounted monitoring device |
-
2023
- 2023-09-28 CN CN202311274488.2A patent/CN117270163B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983779A (en) * | 2019-05-24 | 2020-11-24 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
| CN112154362A (en) * | 2019-07-10 | 2020-12-29 | 深圳市大疆创新科技有限公司 | Optical imaging system and electronic device |
| CN111538140A (en) * | 2020-07-13 | 2020-08-14 | 瑞声通讯科技(常州)有限公司 | Image pickup optical lens |
| CN114252975A (en) * | 2020-09-21 | 2022-03-29 | 光燿科技股份有限公司 | Optical imaging lens |
| CN115079382A (en) * | 2022-08-19 | 2022-09-20 | 杭州德适生物科技有限公司 | Monitoring lens, camera equipment and head-mounted monitoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117270163B (en) | 2024-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108363169B (en) | Image pickup optical lens | |
| CN108873262B (en) | Image pickup optical lens | |
| CN110361842B (en) | Image pickup optical lens | |
| CN111596444B (en) | Image pickup optical lens | |
| CN110488462B (en) | Image pickup optical lens | |
| CN203480119U (en) | Image pick-up lens for solid-state imaging element | |
| CN108363170B (en) | Image pickup optical lens | |
| CN111221104B (en) | Image pickup optical lens | |
| CN111736316B (en) | Image pickup optical lens | |
| CN111736305B (en) | Image pickup optical lens | |
| CN111538138B (en) | Image pickup optical lens | |
| CN109061850B (en) | Image pickup optical lens | |
| CN107065150B (en) | Image pickup optical lens | |
| CN117270163B (en) | Image pickup optical lens | |
| CN112285895B (en) | Image pickup optical lens | |
| CN112230398B (en) | Image pickup optical lens | |
| CN112269244B (en) | Image pickup optical lens | |
| CN111929840B (en) | Image pickup optical lens | |
| CN109031600B (en) | Image pickup optical lens | |
| CN110850556A (en) | Optical lens assembly | |
| CN112269243B (en) | Image pickup optical lens | |
| CN112285899B (en) | Image pickup optical lens | |
| CN112285902B (en) | Image pickup optical lens | |
| CN112285901B (en) | Image pickup optical lens | |
| CN112285894B (en) | Image pickup optical lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |