CN113448061B - Full-picture double-aspheric lens - Google Patents
Full-picture double-aspheric lens Download PDFInfo
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- CN113448061B CN113448061B CN202110933712.9A CN202110933712A CN113448061B CN 113448061 B CN113448061 B CN 113448061B CN 202110933712 A CN202110933712 A CN 202110933712A CN 113448061 B CN113448061 B CN 113448061B
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- spherical
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- 238000003384 imaging method Methods 0.000 claims abstract description 21
- 239000006185 dispersion Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 27
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000005304 optical glass Substances 0.000 claims description 9
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 230000004075 alteration Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention relates to the field of full-frame lens cameras, in particular to a full-frame double-aspheric lens with an effective focal length of 24mm and a relative aperture F6.4, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side; the first lens is a spherical lens protruding to the object space and comprises a convex first spherical surface and a concave second spherical surface; the second lens is an aspheric lens protruding to the object space and comprises a convex third aspheric surface and a convex fourth aspheric surface; the third lens has the same structure as the second lens and is arranged opposite to the second lens, and is an aspheric lens protruding to the object space and comprises a convex fifth aspheric surface and a convex sixth aspheric surface; the fourth lens is a spherical lens concave to the object space and comprises a concave seventh spherical surface and a concave eighth spherical surface; the fifth lens is a spherical lens protruding to the object space and comprises a convex ninth spherical surface and a convex tenth spherical surface. The lens adopts the combination of a spherical lens and an aspherical lens, so that the aberration among the lenses is corrected, and the imaging quality is improved.
Description
Technical Field
The invention relates to the field of full-frame lens cameras, in particular to a full-frame double-aspheric lens with an effective focal length of 24mm and a relative aperture F6.4.
Background
In the camera lens, the double-aspheric-surface full-frame lens has a large number of fans and large demand, but domestic design and manufacture are blank, and the foreign identical lens has low cost performance and high price. Under the background, the dual-aspherical full-width lens with high urgent cost performance appears.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a full-frame double-aspheric lens with high imaging quality, high cost performance, 24mm effective focal length and relative aperture F6.4.
The invention aims at realizing the following technical scheme:
The invention provides a full-frame double-aspheric lens with an effective focal length of 24mm and a relative aperture F6.4, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side; the first lens is a spherical lens protruding to the object space and comprises a convex first spherical surface and a concave second spherical surface; the second lens is an aspheric lens protruding to the object space and comprises a convex third aspheric surface and a convex fourth aspheric surface; the third lens has the same structure as the second lens and is arranged opposite to the second lens, and is an aspheric lens protruding to the object space and comprises a convex fifth aspheric surface and a convex sixth aspheric surface; the fourth lens is a spherical lens concave to the object space and comprises a concave seventh spherical surface and a concave eighth spherical surface; the fifth lens is a spherical lens protruding to the object space and comprises a convex ninth spherical surface and a convex tenth spherical surface;
the full-frame double-aspheric lens realizes full-frame double-aspheric lens imaging with the effective focal length of 24mm and the relative aperture F6.4 through the lens structures and arrangement settings of the first lens and the fifth lens.
Further, the refractive index of the first lens is more than 1.45 and less than 1.6, and the dispersion is more than 40 and less than 55; the refractive index of the second lens is more than 1.5 and less than 1.65, and the dispersion is more than 50 and less than 65; the refractive index of the third lens is more than 1.5 and less than 1.65, and the dispersion is more than 50 and less than 65; the refractive index of the fourth lens is more than 1.6 and less than 1.75, and the dispersion is more than 25 and less than 40; the refractive index of the fifth lens is more than 1.65 and less than 1.80, and the dispersion is more than 35 and less than 45.
Further, the refractive index of the first lens is 1.40, and the dispersion is 47.2; the second lens has a refractive index of 1.534 and a dispersion of 53.7; the third lens has a refractive index of 1.534 and a dispersion of 53.7; the fourth lens has a refractive index of 1.673 and a chromatic dispersion of 32.2; the fifth lens had a refractive index 1.702 and a dispersion of 41.14.
Further, parameters of the full-frame double-aspherical lens are shown in the following table (unit: mm):
further, the first lens, the fourth lens and the fifth lens are made of glass materials, and the second lens and the third lens are made of resin materials.
Further, the material of the first lens is H-QF8CDGM, which belongs to colorless optical glass; the material of the second lens is ZEONF R, which is cycloolefin polymer optical material; the material of the third lens is ZEONF R, which is cycloolefin polymer optical material; the fourth lens is H-ZF2CDGM, which belongs to colorless optical glass; the fifth lens is H-ZBAF, 20 and CDGM, and belongs to colorless optical glass.
The full-frame double-aspheric lens with the effective focal length of 24mm and the relative aperture F6.4 realizes the full-frame double-aspheric lens imaging with the effective focal length of 24mm and the relative aperture F6.4 through the lens structures and arrangement of the first lens to the fifth lens, adopts the combined design of the spherical lens and the aspheric lens, the spherical lens can cause spherical aberration, edge distortion and the like for off-axis light rays, and the aspheric lens combined with the adaptive design can effectively correct the distortion, the edge blurring and the like, correct aberration among the lenses, improve imaging quality, improve imaging definition and integrally improve imaging performance of the lens.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of a full-frame double-aspherical lens with an effective focal length of 24mm and a relative aperture F6.4;
FIG. 2 is an MTF diagram of a full-frame double-aspherical lens with an effective focal length of 24mm and a relative aperture F6.4;
FIG. 3 is a field curvature diagram of a full-frame double-aspherical lens with an effective focal length of 24mm and a relative aperture F6.4;
FIG. 4 is a distortion chart of a full-frame double-aspherical lens with an effective focal length of 24mm and a relative aperture F6.4;
FIG. 5 is a graph of the relative illuminance of a full-frame double-aspherical lens with an effective focal length of 24mm and a relative aperture F6.4;
wherein the reference numerals are as follows: 1. a first lens; 2. a second lens; 3. a third lens; 4. a fourth lens; 5. and a fifth lens.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which 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, shall fall within the scope of the present invention.
As shown in fig. 1 to 5, a full-frame double-aspherical lens with an effective focal length of 24mm and a relative aperture F6.4 according to an embodiment of the present invention includes, in order from the object, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, and a fifth lens 5; the first lens 1 is a spherical lens protruding to the object space and comprises a convex first spherical surface and a concave second spherical surface; the second lens 2 is an aspheric lens protruding to the object space and comprises a convex third aspheric surface and a convex fourth aspheric surface; the third lens 3 has the same structure as the second lens 2 and is arranged opposite to the second lens 2, and the third lens 3 is an aspheric lens protruding to the object space and comprises a convex fifth aspheric surface and a convex sixth aspheric surface; the fourth lens 4 is a spherical lens concave to the object space and comprises a concave seventh spherical surface and a concave eighth spherical surface; the fifth lens 5 is a spherical lens protruding to the object space and comprises a convex ninth spherical surface and a convex tenth spherical surface;
The full-frame double-aspheric lens realizes full-frame double-aspheric lens imaging with the effective focal length of 24mm and the relative aperture F6.4 through the lens structures and arrangement settings of the first lens 1 to the fifth lens 5.
The full-frame double-aspheric lens with the effective focal length of 24mm and the relative aperture F6.4 realizes full-frame double-aspheric lens imaging with the effective focal length of 24mm and the relative aperture F6.4 through the lens structure and arrangement of the first lens 1 to the fifth lens 5, adopts the combined design of combining the spherical lens and the aspheric lens, and can effectively correct distortion, edge blurring and the like for off-axis light rays, and the aspheric lens combined with the adaptive design can effectively correct the distortion, the edge blurring and the like, correct aberration among the lenses, improve imaging quality, improve imaging definition and integrally improve imaging performance of the lens.
Firstly, confirming the range of refractive index and chromatic dispersion number according to the design requirement of a full-image-width double-aspheric lens with an effective focal length of 24mm and a relative aperture F6.4, and selecting conventional materials according to the principle of benefiting the structural image quality of the optical lens: the refractive index of the first lens 1 is more than 1.45 and less than 1.6, and the dispersion is more than 40 and less than 55; the refractive index of the second lens 2 is more than 1.5 and less than 1.65, and the dispersion is more than 50 and less than 65; the refractive index of the third lens 3 is more than 1.5 and less than 1.65, and the dispersion is more than 50 and less than 65; the refractive index of the fourth lens 4 is more than 1.6 and less than 1.75, and the dispersion is more than 25 and less than 40; the refractive index of the fifth lens 5 is more than 1.65 and less than 1.80, and the dispersion is more than 35 and less than 45.
According to the structure of the optical lens, the refractive index and the dispersion number are determined, the refractive index and the dispersion number of a group of better image quality are selected, and under the state of better aberration and distortion, the optical material is determined: the refractive index of the first lens 1 is 1.40 and the dispersion is 47.2; the refractive index of the second lens 2 is 1.534 and the dispersion is 53.7; the refractive index of the third lens 3 is 1.534 and the dispersion is 53.7; the fourth lens 4 has a refractive index of 1.673 and a chromatic dispersion of 32.2; the refractive index of the fifth lens 5 is 1.702 and the dispersion is 41.14.
According to the design requirement of the full-frame double-aspheric lens with the effective focal length of 24mm and the relative aperture F6.4, the relative size of a group of lenses with better quality is selected and confirmed, the preferred scheme can simultaneously meet the requirement of high quality of imaging, the appearance shape of the formed lens structure is more attractive, and the parameters of the full-frame double-aspheric lens are shown in the following table (unit: mm):
According to the optical path structure and design requirements of the lens, a better lens material combination is selected, and the combination of the spherical lens and the aspherical lens is selected, so that the aberration such as spherical aberration and distortion can be reduced: the first lens 1, the fourth lens 4, and the fifth lens 5 are made of glass materials, and the second lens 2 and the third lens 3 are made of resin materials.
According to the optical path structure, refractive index and dispersion number of the lens, a group of conventional materials with better imaging quality are selected, so that the imaging quality is improved: the material of the first lens 1 is H-QF8CDGM, which belongs to colorless optical glass; the material of the second lens 2 is ZEONF R, which is cycloolefin polymer optical material; the material of the third lens 3 is ZEONF R, which is cycloolefin polymer optical material; the material of the fourth lens 4 is H-ZF2CDGM, which belongs to colorless optical glass; the fifth lens 5 is made of H-ZBAF, 20 and CDGM, and belongs to colorless optical glass.
The full-frame double-aspheric lens with the effective focal length of 24mm and the relative aperture F6.4 has the advantages of clear imaging, high cost performance and attractive appearance. The quality of the lens is improved by adopting the aspheric surface, and the imaging performance of the lens is improved. The lens adopts the combination of the spherical surface and the aspherical surface, so that the aberration among the lenses is corrected, and the resin optical material is used for replacing glass, so that the weight of the lens is reduced, the imaging quality is improved, the imaging definition is improved, and the imaging performance of the lens is improved as a whole.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (3)
1. The full-picture double-aspheric lens is characterized by comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object side; the first lens is a spherical lens protruding to the object space and comprises a convex first spherical surface and a concave second spherical surface; the second lens is an aspheric lens protruding to the object space and comprises a convex third aspheric surface and a convex fourth aspheric surface; the third lens has the same structure as the second lens and is arranged opposite to the second lens, and is an aspheric lens protruding to the object space and comprises a convex fifth aspheric surface and a convex sixth aspheric surface; the fourth lens is a spherical lens concave to the object space and comprises a concave seventh spherical surface and a concave eighth spherical surface; the fifth lens is a spherical lens protruding to the object space and comprises a convex ninth spherical surface and a convex tenth spherical surface;
the full-frame double-aspheric lens realizes full-frame double-aspheric lens imaging with an effective focal length of 24mm and a relative aperture F6.4 through lens structures and arrangement of the first lens to the fifth lens;
The refractive index of the first lens is 1.40, and the chromatic dispersion is 47.2; the refractive index of the second lens is 1.534, and the dispersion is 53.7; the refractive index of the third lens is 1.534, and the dispersion is 53.7; the refractive index of the fourth lens is 1.673, and the chromatic dispersion is 32.2; the refractive index of the fifth lens is 1.702, and the chromatic dispersion is 41.14;
parameters of the full-frame double-aspheric lens are shown in the following table (unit: mm):
2. The full-frame double-aspherical lens according to claim 1 wherein the first lens, the fourth lens and the fifth lens are made of glass materials, and the second lens and the third lens are made of resin materials.
3. The full-frame double-aspherical lens according to claim 1 wherein the material of the first lens is H-QF8CDGM, which is colorless optical glass; the material of the second lens is ZEONF R, which is cycloolefin polymer optical material; the material of the third lens is ZEONF R, which is cycloolefin polymer optical material; the fourth lens is made of H-ZF2CDGM, and belongs to colorless optical glass; the fifth lens is made of H-ZBAF-20 CDGM and belongs to colorless optical glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110933712.9A CN113448061B (en) | 2021-08-15 | 2021-08-15 | Full-picture double-aspheric lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110933712.9A CN113448061B (en) | 2021-08-15 | 2021-08-15 | Full-picture double-aspheric lens |
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| Publication Number | Publication Date |
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| CN113448061A CN113448061A (en) | 2021-09-28 |
| CN113448061B true CN113448061B (en) | 2024-05-17 |
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| CN115201968B (en) * | 2022-06-14 | 2024-04-19 | 核工业理化工程研究院 | Optical fiber coupler and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005316071A (en) * | 2004-04-28 | 2005-11-10 | Olympus Corp | Laser machining device |
| CN201654312U (en) * | 2010-02-08 | 2010-11-24 | 浙江舜宇光学有限公司 | High pixel wide-angle pick-up lens |
| KR20180087133A (en) * | 2017-01-22 | 2018-08-01 | 둥관 위퉁 옵티컬 테크놀로지 컴퍼니 리미티드 | Small-sized low-cost 4mp non-thermal fixed-focus lens |
| CN215416076U (en) * | 2021-08-15 | 2022-01-04 | 博圳道(深圳)科技有限公司 | Full-picture double-aspheric lens with effective focal length of 24mm and relative aperture F6.4 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6066179B2 (en) * | 2013-01-11 | 2017-01-25 | カンタツ株式会社 | Imaging lens |
| JP6105317B2 (en) * | 2013-01-25 | 2017-03-29 | カンタツ株式会社 | Wide-angle imaging lens |
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- 2021-08-15 CN CN202110933712.9A patent/CN113448061B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005316071A (en) * | 2004-04-28 | 2005-11-10 | Olympus Corp | Laser machining device |
| CN201654312U (en) * | 2010-02-08 | 2010-11-24 | 浙江舜宇光学有限公司 | High pixel wide-angle pick-up lens |
| KR20180087133A (en) * | 2017-01-22 | 2018-08-01 | 둥관 위퉁 옵티컬 테크놀로지 컴퍼니 리미티드 | Small-sized low-cost 4mp non-thermal fixed-focus lens |
| CN215416076U (en) * | 2021-08-15 | 2022-01-04 | 博圳道(深圳)科技有限公司 | Full-picture double-aspheric lens with effective focal length of 24mm and relative aperture F6.4 |
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| CN113448061A (en) | 2021-09-28 |
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