CN109212725A - A kind of wide-angle lens - Google Patents
A kind of wide-angle lens Download PDFInfo
- Publication number
- CN109212725A CN109212725A CN201811342771.3A CN201811342771A CN109212725A CN 109212725 A CN109212725 A CN 109212725A CN 201811342771 A CN201811342771 A CN 201811342771A CN 109212725 A CN109212725 A CN 109212725A
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- CN
- China
- Prior art keywords
- lens
- wide
- angle
- focal length
- angle 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.)
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- 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
- G02B13/001—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
Abstract
The present invention provides a kind of wide-angle lens, the incidence surface including setting gradually from object side to image side is the first lens that convex surface light-emitting surface is concave surface, incidence surface be the second lens that convex surface light-emitting surface is concave surface, the third lens of biconvex structure, diaphragm, biconvex structure the 4th lens, the 5th lens of bi-concave structure and the 6th lens of biconvex structure；First lens and the third lens are glass material, and the light of object side is successively imaged through first lens, the second lens, the third lens, diaphragm, the 4th lens, the 5th lens and the 6th lens transmission to image side.Wide-angle lens provided by the invention can guarantee in temperature change, keep its original imaging effect, substantially increase the environmental suitability of wide-angle lens, in the environment of -20 DEG C~60 DEG C can blur-free imaging, with the high-resolution having under room temperature.
Description
Technical field
The present invention relates to optical imaging field, in particular to a kind of wide-angle lens.
Background technique
Wide-angle lens is widely used in the photographing devices such as mobile phone, slr camera, deep to be liked by the vast good person that photographs, with
Application need continuous promotion, it is increasing for the demand of small size low cost camera lens.Wide-angle lens is environmentally sensitive,
It in the prior art, can the wide-angle lens of blur-free imaging be glass lens in high temperature or low temperature environment, cost is very high, and mirror
Piece number is more, is unfavorable for minimizing；Plastic cement eyeglass is at low cost, but environmental suitability is poor, in higher temperatures or low temperature environment
Image quality is unable to satisfy requirement；The combination of plastic lens and glass lens can while improving environmental suitability energy
Enough guarantee lower production cost, but existing compound lens is only by plastic lens and glass lens simple combination, environment
Adaptability is not improved still.
Summary of the invention
The main object of the present invention is to provide a kind of wide-angle lens, it is intended to which the combination for solving plastic lens and glass lens is wide
The problem of angle mirror headring border bad adaptability.
To achieve the above object, a kind of wide-angle lens proposed by the present invention, enters including what is set gradually from object side to image side
Smooth surface is the first lens that convex surface light-emitting surface is concave surface, incidence surface is the second lens that convex surface light-emitting surface is concave surface, biconvex knot
The third lens of structure, diaphragm, the 4th lens of biconvex structure, the 5th lens of bi-concave structure and biconvex structure the 6th
Lens；First lens and the third lens are glass material, the light of object side successively through first lens, the second lens,
The third lens, diaphragm, the 4th lens, the 5th lens and the 6th lens transmission to image side are imaged.
Preferably, second lens, the 4th lens, the 5th lens and the 6th lens are plastic cement material.
Preferably, second lens compensate the focal shift of the 4th lens with the 5th lens.
Preferably, second lens, the 4th lens, the 5th lens and the 6th lens are aspherical mirror.
Preferably, the edge thickness of the third lens is greater than 2mm.
Preferably, first lens, the second lens and the 5th power of lens are negative, the third lens, the 4th
Lens and the 6th power of lens are positive.
Preferably, the intersection point of the curved surface where the light emission side of first lens and the wide-angle lens optical axis is C point, institute
The ratio for stating the distance between plane where the endpoint of C point and the curved surface and first lens center thickness is 1~
2.5。
Preferably, the ratio of the focal length of the focal length of the wide-angle lens and second lens is -0.3~-0.2；It is described
The ratio of the focal length of wide-angle lens and the focal length of the third lens is 0.4~0.5；The focal length of the wide-angle lens and described the
The ratio of the focal length of four lens is 0.7~0.8；The ratio of the focal length of the focal length of the wide-angle lens and the 5th lens is-
0.95~-0.85；The ratio of the focal length of the focal length of the wide-angle lens and the 6th lens is 0.3~0.4.
Preferably, the system overall length of the wide-angle lens is less than 8.5mm.
The third lens of glass material are arranged in technical solution of the present invention between the second lens and the 4th lens, thoroughly second
First lens of the incident side setting glass material of mirror, and glass lens are influenced by temperature very little, so that when the temperature is changed,
Focal shift caused by other lens of the third lens two sides can cancel out each other according to the optical property of itself because of temperature change,
To guarantee the whole image quality of camera lens, with the high-resolution having under room temperature, the ring of wide-angle lens is greatly improved
Border adaptability.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of an embodiment of wide-angle lens of the present invention；
Fig. 2 is the modulation transfer function curve graph of wide-angle lens of the present invention；
Fig. 3 is the point range figure of wide-angle lens of the present invention；
Fig. 4 is the distortion figure of wide-angle lens of the present invention；
Fig. 5 is the magnification chromatic aberration diagram of wide-angle lens of the present invention；
Fig. 6 is the illumination figure of wide-angle lens of the present invention；
Fig. 7 is the defocusing curve figure under wide-angle lens room temperature of the present invention；
Fig. 8 is defocusing curve figure of the wide-angle lens of the present invention at -20 DEG C；
Fig. 9 is defocusing curve figure of the wide-angle lens of the present invention at 60 DEG C.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 10 | First lens | 15 | 6th lens |
| 11 | Second lens | 16 | Optical filter |
| 12 | The third lens | 17 | Protect plate |
| 13 | 4th lens | 18 | Image planes |
| 14 | 5th lens | 19 | Diaphragm |
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can
It to be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution occurs
Conflicting or cannot achieve when, will be understood that the combination of this technical solution is not present, also not the present invention claims protection model
Within enclosing.
Please with reference to Fig. 1-9, the invention proposes a kind of wide-angle lens, which is characterized in that the wide-angle lens includes
The first lens 10, the second lens 11, the third lens 12, diaphragm 19, the 4th lens the 13, the 5th set gradually from object side to image side
Lens 14 and the 6th lens 15, first lens 10 and the third lens 12 are glass material；Second lens 11 with it is described
5th lens 14 compensate the focal shift of the 4th lens 13, and the light of object side passes sequentially through first lens
10, second lens 11, the third lens 12, the diaphragm 19, the 4th lens 13, the 5th lens 14 and
Six lens 15 are transmitted to image side imaging；First lens 10, the second lens 11, the third lens 12, diaphragm 19, the 4th lens
13, the optical centre of the 5th lens 14 and the 6th lens 15 is located on same optical axis.
In the present embodiment, the second lens 11, the 4th lens 13, the 5th lens 14 and the 6th lens 15 are plastic cement material,
The lens of plastic cement material are easy to be acted upon by temperature changes, and therefore, when temperature is raised and lowered, the second lens the 11, the 5th are thoroughly
Focal shift can occur for mirror 14 and the 4th lens 13, and optical path can change when light is through the lens that focal shift occurs,
Leading to the imaging definition of camera lens reduces.But since the focal power of the second lens 11 and the 5th lens 14 is negative, to light starting
Effect is dissipated, the focal power of the 4th lens 13 is positive, and converging action is played to light, so the second lens 11 and the 5th lens 14 are just
The focus of the optical path correction that will be shifted by the 4th lens 13, i.e. the second lens 11 and the 5th lens 14 to the 4th lens 13
Offset has compensating action.And the first lens 10 and the third lens 12 are glass material, the focal power of the 6th lens 15 is small, temperature
Influence of the variation to the first lens 10, the third lens 12 and the 6th lens 15 it is little, so the variation of temperature is to wide-angle lens
Whole optical property influence less, be able to maintain its original imaging effect, can be clear in the environment of -20 DEG C~60 DEG C
Imaging, with the high-resolution having under room temperature.
Since the cost of plastic lens is cheaper than glass lens, it only include the wide-angle lens of two panels glass lens
Can there are good image quality and and good environmental suitability in the case where low cost.It as Figure 7-9, can from figure
To see, compared to room temperature, the clarity that wide-angle lens is imaged in -20 DEG C and 60 ° is declined slightly, but whole optical property
Variation is little.
The wide-angle lens meets following relational expression: tan (HFOV)/TTL > 0.91, wherein HFOV be wide-angle lens most
The half of big visual field, TTL are distance of the incidence surface of the first lens of wide-angle lens to image planes 18 on optical axis, that is, wide-angle lens
Overall length, in the present embodiment, the system overall length of wide-angle lens is less than 8.5mm.The relational expression enables wide-angle lens in picture
Side blur-free imaging guarantees the high-resolution of wide-angle lens.
The visual field of the wide-angle lens is 165 °.
The wide-angle lens further includes the optical filter 16 being arranged successively from object side to image side and protection plate 17, and the filter
Mating plate 16 and protection plate 17 are in the light emission side of the 6th lens 15.Wherein, optical filter 16 plays filter action, so that imaging is not
Distortion, the material object for enabling wide-angle lens height reduzate side to shoot guarantee image quality；Protect plate 17 flat for a sheet glass
Plate, the light emission side of protection plate 17 are provided with sensor (not indicating in figure) and image planes 18, and the major function of protection plate 17 is
It shields to sensor and image planes 18.
In the present embodiment, since the hardness of glass is higher, the first lens 10 are in addition to playing deviation to injection optical path therein
Effect is outer, additionally it is possible to which protection setting is not damaged in the light path element of 10 light emission side of the first lens by the external world.
Since diaphragm 19 has direct influence, the position of diaphragm 19 to the visual field of wide-angle lens and the light intensity for entering camera lens
Set the volume and field range that will affect wide-angle lens；In the preferred embodiment, diaphragm 19 is in the third lens 12 and the 4th thoroughly
Between mirror 13, be conducive to the length and diameter that reduce camera lens.
As shown in Figure 1, as one embodiment, the incidence surface of the first lens 10 is convex surface, light-emitting surface is concave surface, and first thoroughly
The focal power of mirror 10 is negative, and light is bigger than entering the angle dissipated before the first lens 10 after the injection of the first lens 10, if the
The intersection point of curved surface and the wide-angle lens optical axis where the light-emitting surface of one lens 10 is C point, the end of the C point and the curved surface
The ratio of the distance between plane where point and 10 center thickness of the first lens is 1~2.5.
The focal power of second lens 11 is negative, what light dissipated before comparing after the injection of the second lens 11 into the second lens 11
Angle is bigger, and incidence surface is convex surface, and light-emitting surface is concave surface, and there are one with edge for any one depressed area of light-emitting surface
The ratio of the focal length of fixed spacing, the focal length of the wide-angle lens and second lens 11 is -0.3~-0.2.
The focal power of the third lens 12 is positive, what light dissipated before comparing after the injection of the third lens 12 into the third lens 12
Angle becomes smaller；The third lens 12 are biconvex structure, and the incidence surface of the third lens 12 is protruded since edge to incident side, out light
Face is protruded not since edge to light emission side, between any one boss of light-emitting surface exists centainly with edge
Away from the ratio of the focal length of the focal length of the wide-angle lens and the third lens 12 is 0.4~0.5, and edge thickness is greater than 2mm.
The focal power of 4th lens 13 is positive, what light dissipated before comparing after the injection of the 4th lens 13 into the 4th lens 13
Angle becomes smaller；4th lens 13 have biconvex structure, any one boss of incidence surface exists with edge certain
Spacing, light-emitting surface are protruded since edge to light emission side, the ratio of the focal length of the focal length of wide-angle lens and the 4th lens 13
It is 0.7~0.8.
The focal power of 5th lens 14 is negative, what light dissipated before comparing after the injection of the 5th lens 14 into the 5th lens 14
Angle becomes larger, and the 5th lens 14 have bi-concave structure, and wherein incidence surface is not recessed since edge, and any the one of incidence surface
Locate depressed area with edge there are certain spacing, light-emitting surface is recessed since edge；The focal length of wide-angle lens and described the
The ratio of the focal length of five lens is -0.95~-0.85.
The focal power of 6th lens 15 is positive, what light dissipated before comparing after the injection of the 6th lens 15 into the 6th lens 15
Angle becomes smaller；6th lens 15 have biconvex structure, on light-emitting surface there is an at least point of inflexion, light-emitting surface to open from the point of inflexion
Begin to protrude to light emission side, incidence surface protrusion not since edge, any one boss of incidence surface exists with edge
Certain spacing；The ratio of the focal length of the focal length of wide-angle lens and the 6th lens is 0.3~0.4.
In the preferred embodiment, the second lens 11, the 4th lens 13, the 5th lens 14 and the 6th lens 15 are aspherical
Mirror, aspherical mirror have higher freedom degree than spherical mirror, can preferably aberration correction, but the aspherical mirror of plastic cement material
It is not much different with the cost of spherical mirror, therefore can be imaged apparent with being realized with a low cost high-resolution.
In the present embodiment, the first lens 10 of glass material and the refractive index of the third lens 12 are 1.7~1.85, dispersion
Coefficient is 30~50；Second lens 11 of plastic cement material, the 4th lens 13, the 5th lens 14 and the 6th lens 15 refractive index be
1.45~1.75, the abbe number of the second lens 11, the 4th lens 13 and the 6th lens 15 is 50~70, the color of the 5th lens 14
Dissipating coefficient is 20~30.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the design of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/it is used in it indirectly
He is included in scope of patent protection of the invention relevant technical field.
Claims (9)
1. a kind of wide-angle lens, which is characterized in that the wide-angle lens includes that the incidence surface set gradually from object side to image side is
Convex surface light-emitting surface be the first lens, the incidence surface of concave surface be the second lens that convex surface light-emitting surface is concave surface, biconvex structure
Three lens, diaphragm, biconvex structure the 4th lens, the 5th lens of bi-concave structure and the 6th lens of biconvex structure；
First lens and the third lens are glass material；
The light of object side is successively through first lens, the second lens, the third lens, diaphragm, the 4th lens, the 5th lens and
Six lens transmissions to image side is imaged.
2. wide-angle lens according to claim 1, which is characterized in that second lens, the 4th lens, the 5th lens and
6th lens are plastic cement material.
3. wide-angle lens according to claim 2, which is characterized in that second lens are with the 5th lens to described
The focal shift of 4th lens compensates.
4. wide-angle lens according to claim 2, which is characterized in that second lens, the 4th lens, the 5th lens and
6th lens are aspherical mirror.
5. wide-angle lens according to claim 1, which is characterized in that the edge thickness of the third lens is greater than 2mm.
6. wide-angle lens according to claim 1, which is characterized in that first lens, the second lens and the 5th lens
Focal power be negative, the third lens, the 4th lens and the 6th power of lens are positive.
7. wide-angle lens according to claim 1, which is characterized in that curved surface where the light emission side of first lens with
The intersection point of the wide-angle lens optical axis is C point, the distance between the C point and plane where the endpoint of the curved surface with it is described
The ratio of first lens center thickness is 1~2.5.
8. wide-angle lens according to claim 1, which is characterized in that the focal length of the wide-angle lens and second lens
Focal length ratio be -0.3~-0.2；The ratio of the focal length of the focal length of the wide-angle lens and the third lens is 0.4~
0.5；The ratio of the focal length of the focal length of the wide-angle lens and the 4th lens is 0.7~0.8；The focal length of the wide-angle lens
Ratio with the focal length of the 5th lens is -0.95~-0.85；The coke of the focal length of the wide-angle lens and the 6th lens
Away from ratio be 0.3~0.4.
9. wide-angle lens as described in claim 1, which is characterized in that the system overall length of the wide-angle lens is less than 8.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811342771.3A CN109212725B (en) | 2018-11-09 | 2018-11-09 | Wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811342771.3A CN109212725B (en) | 2018-11-09 | 2018-11-09 | Wide-angle lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109212725A true CN109212725A (en) | 2019-01-15 |
| CN109212725B CN109212725B (en) | 2020-11-24 |
Family
ID=64995702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811342771.3A Active CN109212725B (en) | 2018-11-09 | 2018-11-09 | Wide-angle lens |
Country Status (1)
| Country | Link |
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| CN (1) | CN109212725B (en) |
Citations (9)
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|---|---|---|---|---|
| CN1493014A (en) * | 2001-02-28 | 2004-04-28 | 3M创新有限公司 | Projection lenses for use with reflective pixelized panels |
| EP1734393A1 (en) * | 2005-06-15 | 2006-12-20 | Ricoh Company, Ltd. | Photographic optical system, photocographic lens unit, camera and mobile information terminal |
| EP1947497A2 (en) * | 2007-01-22 | 2008-07-23 | Fujinon Corporation | Compact fisheye objective lens |
| WO2010113669A1 (en) * | 2009-04-03 | 2010-10-07 | Ricoh Company, Ltd. | Wide angle lens and imaging device |
| CN106154487A (en) * | 2015-04-02 | 2016-11-23 | 大立光电股份有限公司 | Optical lens, image-taking device and electronic installation |
| CN106501922A (en) * | 2016-12-27 | 2017-03-15 | 东莞市宇瞳光学科技股份有限公司 | The low distortion tight shot of small-sized ultra-wide angle |
| JP2017068164A (en) * | 2015-10-01 | 2017-04-06 | オリンパス株式会社 | Wide angle optical system and image capturing device having the same |
| CN107577030A (en) * | 2016-07-05 | 2018-01-12 | 信泰光学(深圳)有限公司 | Wide-angle lens |
| US20180149834A1 (en) * | 2016-11-28 | 2018-05-31 | Sintai Optical (Shenzhen) Co., Ltd. | Lens Assembly |
-
2018
- 2018-11-09 CN CN201811342771.3A patent/CN109212725B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493014A (en) * | 2001-02-28 | 2004-04-28 | 3M创新有限公司 | Projection lenses for use with reflective pixelized panels |
| EP1734393A1 (en) * | 2005-06-15 | 2006-12-20 | Ricoh Company, Ltd. | Photographic optical system, photocographic lens unit, camera and mobile information terminal |
| EP1947497A2 (en) * | 2007-01-22 | 2008-07-23 | Fujinon Corporation | Compact fisheye objective lens |
| WO2010113669A1 (en) * | 2009-04-03 | 2010-10-07 | Ricoh Company, Ltd. | Wide angle lens and imaging device |
| CN106154487A (en) * | 2015-04-02 | 2016-11-23 | 大立光电股份有限公司 | Optical lens, image-taking device and electronic installation |
| JP2017068164A (en) * | 2015-10-01 | 2017-04-06 | オリンパス株式会社 | Wide angle optical system and image capturing device having the same |
| CN107577030A (en) * | 2016-07-05 | 2018-01-12 | 信泰光学(深圳)有限公司 | Wide-angle lens |
| US20180149834A1 (en) * | 2016-11-28 | 2018-05-31 | Sintai Optical (Shenzhen) Co., Ltd. | Lens Assembly |
| CN106501922A (en) * | 2016-12-27 | 2017-03-15 | 东莞市宇瞳光学科技股份有限公司 | The low distortion tight shot of small-sized ultra-wide angle |
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| CN109212725B (en) | 2020-11-24 |
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Effective date of registration: 20201014 Address after: 261031, north of Jade East Street, Dongming Road, Weifang hi tech Zone, Shandong province (GoerTek electronic office building, Room 502) Applicant after: GoerTek Optical Technology Co.,Ltd. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Applicant before: GOERTEK Inc. |
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