CN106932889A - Wide-angle lens - Google Patents
Wide-angle lens Download PDFInfo
- Publication number
- CN106932889A CN106932889A CN201710296809.7A CN201710296809A CN106932889A CN 106932889 A CN106932889 A CN 106932889A CN 201710296809 A CN201710296809 A CN 201710296809A CN 106932889 A CN106932889 A CN 106932889A
- Authority
- CN
- China
- Prior art keywords
- lens
- wide
- angle
- convex surface
- image side
- 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
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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
- 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
- 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
Abstract
The invention discloses a kind of wide-angle lens, it includes the first lens group being sequentially distributed by thing side to image side along optical axis, the second lens group and image planes, wherein, first lens group includes the first lens, and system meets 0.12<EFL/TTL<0.3, wherein EFL are the effective focal length of wide-angle lens, and TTL is the optics overall length of wide-angle lens.The system parameter setting of wide-angle lens of the invention is realized realizing focus with one group of lens movement, distortion and aberration are preferably controlled simultaneously, the lens of introducing are few, focusing load is small, focusing speed easily ensures, while camera lens small volume, low cost, the purchase of production and sales and consumer beneficial to producer.
Description
Technical field
The present invention relates to fields of light devices, more particularly to a kind of wide-angle lens.
Background technology
At present, wide-angle lens of the known picture angle more than 90 degree is all that focus, Er Qiewei are realized with multiple lens movement
Control distortion and aberration, introduce a large amount of lens, cause lens many, and focusing load is big, the speed bad guarantee of focusing, while camera lens
Volume is big, and high cost causes larger burden to consumer.
The content of the invention
Wide-angle lens it is an object of the invention to solve a kind of less lens, camera lens small volume, small distortion.
The present invention proposes a kind of wide-angle lens, and it includes the first lens group being sequentially distributed by thing side to image side along optical axis
Group, the second lens group and image planes, wherein, first lens group includes the first lens, and system meets 0.12<EFL/
TTL<0.3, wherein EFL are the effective focal length of wide-angle lens, and TTL is the optics overall length of wide-angle lens.
Further, first lens group is included on optical axis the second lens successively and the 3rd lens, wherein, tool
The thing side for having first lens of negative power is convex surface, and image side surface is concave surface；The second lens with negative power
Thing side is convex surface, and image side surface is concave surface；The thing side of the 3rd lens with negative power is convex surface, and image side surface is recessed
Face.
Further, first lens group also includes the 4th lens, and the 4th lens exist relative to the 3rd lens
Be may move between thing side and image side, the stroke of the 4th lens meets：0.02<L/H<0.07, wherein L are the total of the 4th lens
Stroke, H is system image planes size.
Further, the 3rd lens are even aspheric surface lens.
Further, first lens group also includes the 5th lens, and the thing side of the 5th lens is convex surface, as
Side is convex surface.
Further, second lens group also includes the 6th lens and the 7th lens, the 6th lens and the 7th
Lens are glued fixed.
Further, the thing side of the 6th lens is concave surface, and image side surface is concave surface；The thing side of the 7th lens
It is convex surface, image side surface is convex surface.
Further, second lens group also includes that the be located at the image side surface of first lens group the 9th is saturating
Mirror, the 9th lens are even aspheric surface lens, and the 9th lens meet 1.7<n<1.9,30<λ<45, wherein n are glass
Refractive index, λ for glass Abbe number.
Further, also including being located at the 8th lens of the 9th lens thing side, the 8th lens have positive light
Focal power, the thing side of the 8th lens is convex surface, and image side surface is convex surface.
Further, it is provided with diaphragm between first lens group and the second lens group.
Compared with prior art, the present invention has the advantages that：
The system parameter setting of wide-angle lens of the invention is realized realizing focus with one group of lens movement, while preferably
Distortion and aberration are controlled, the lens of introducing are few, focusing load is small, focusing speed easily ensures, while camera lens small volume, cost
It is low, the purchase of production and sales and consumer beneficial to producer.
Brief description of the drawings
Fig. 1 is the structural representation of the wide-angle lens described in the embodiment of the present invention.
Fig. 2 is chromaticity difference diagram on the axle of the wide-angle lens described in the embodiment of the present invention.
Fig. 3 is the astigmatism curve map of the wide-angle lens described in the embodiment of the present invention.
Fig. 4 is the distortion curve figure of the wide-angle lens described in the embodiment of the present invention.
Fig. 5 is the ratio chromatism, curve map of the wide-angle lens described in the embodiment of the present invention.
Specific embodiment
In order to further illustrate principle of the invention and structure, the preferred embodiments of the present invention are carried out in detail in conjunction with accompanying drawing
Describe in detail bright.
Refer to Fig. 1, a kind of wide-angle lens, it includes the first lens group being sequentially distributed by thing side to image side along optical axis
10, the second lens group 20 and image planes 30, wherein, first lens group 10 includes the first lens 1, and system meets 0.12
<EFL/TTL<0.3, wherein EFL are the effective focal length of wide-angle lens, and TTL is the optics overall length of wide-angle lens.TTL is represented from
Distance of one lens apex to image planes 30.
When EFL/TTL ratios are less than 0.12, visual angle can be caused excessively wide, distortion and spherical aberration are difficult correction, or system mistake
Length is unfavorable for system compact.When EFL/TTL ratios are more than 0.3, easy visual angle is not enough, or system it is too short be difficult to carry out it is abnormal
Become and aberration correction.
First lens group 10 is additionally included on optical axis the second lens 2 and the 3rd lens 3 successively, wherein, have
The thing side of first lens 1 of negative power is convex surface, and image side surface is concave surface.The second lens 2 with negative power
Thing side is convex surface, and image side surface is concave surface.The thing side of the 3rd lens 3 with negative power is convex surface, and image side surface is recessed
Face.
3rd lens 3 are even aspheric surface lens.The Main Function of 3rd lens 3 is correction systematical distortion.
First lens group 10 also includes the 4th lens 4, and the 4th lens 4 are relative to the 3rd lens 3 in thing side
Be may move between image side, the stroke of the 4th lens 4 meets：0.02<L/H<0.07, wherein L are the head office of the 4th lens 4
Journey, H is the size of system image planes 30.4th lens 4, when lens are toward thing side shifting, are realized remote as focusing microscope group of floating
Focus, when lens are moved toward image side, realizes closely focus.
First lens group 10 also includes the 5th lens 5, and the thing side of the 5th lens 5 is convex surface, image side surface
It is convex surface.
Second lens group 20 also includes the 6th lens 6 and the 7th lens 7, and the 6th lens 6 are located at described the
The image side surface of five lens 5, the 6th lens 6 and the 7th lens 7 are glued fixed.
The thing side of the 6th lens 6 is concave surface, and image side surface is concave surface；The thing side of the 7th lens 7 is convex surface,
Image side surface is convex surface.
Second lens group 20 also includes the 9th lens of the image side surface positioned at first lens group 10, described
9th lens 9 are non-spherical lens, and the 9th lens 9 meet 1.7<n<1.9,30<λ<45, wherein n are the refractive index of glass,
λ is the Abbe number of glass.The Main Function of 9th lens 9 be aberration correction, lack it is a piece of can all introduce a large amount of glass spherical lenses,
It is unfavorable for the miniaturization of total system.
Also include the 8th lens 8, the 8th lens 8 have positive light coke, and the thing side of the 8th lens 8 is convex surface, as
Side is convex surface.
Diaphragm is provided between the lens group 20 of first lens group 10 and second.
In a specific embodiment, the optical lens is sequentially included by thing side to image side：With negative power
One lens 1, its thing side is convex surface, including the first sphere (convex surface), the second sphere (concave surface).
The second lens 2 with negative power, its thing side is convex surface, including the 3rd sphere (convex surface), the 4th sphere is (recessed
Face).
The 3rd lens 3 with negative power, its thing side is convex surface, including the 5th aspherical (convex surface), the 6th sphere
Non- (concave surface).
The 4th lens 4 with positive light coke, its thing side is convex surface, including the 7th sphere (convex surface), the 8th sphere is (recessed
Face).The 5th lens 5 with positive light coke, its thing side is convex surface, including the 9th sphere (convex surface), the tenth sphere (convex surface).
The 6th lens 6 with negative power, its thing side is concave surface, including the 11st sphere (concave surface), the 12nd ball
Face (concave surface).
The 7th lens 7 with positive light coke, its thing side is convex surface, including the 13rd sphere (convex surface), the 14th ball
Face (convex surface).
The 8th lens 8 with positive light coke, its thing side is convex surface, including the 15th sphere (convex surface), the 16th ball
Face (convex surface).
The 9th lens 9 with negative power, its thing side is convex surface, including the 17th aspherical (convex surface), the 18th
Aspherical (concave surface).Wherein, the 13rd sphere of the 12nd sphere of the 6th lens and the 7th lens is glued.
Illustrated with a specific example, the systematic parameter of wide-angle lens is：TTL=51.4；EFL=10.13；H=
21.6；F/#=2, w=47 °, w are angle of half field-of view.Interval when thickness column has that numerical value is infinity before "/", is nearest after "/"
Interval during focusing.
Following table is the parameter list of the 3rd lens and the 9th lens, aspherical parameter list：
Even aspheric surface is defined：
Wherein,
y：The radial coordinate since optical axis；
Z：Aspherical and optical axis joining starts, the side-play amount of optical axis direction；
r：The radius of curvature of aspherical benchmark sphere；
K, 4 times, 6 times, 8 times, 10 times, the asphericity coefficient of 12 times.
Fig. 2 is chromaticity difference diagram on the axle of the wide-angle lens described in the embodiment of the present invention, and aberration figure represents that different-waveband exists on axle
Different pupil bands deviates the degree of preferable image planes position.Transverse axis represents side-play amount, and the longitudinal axis represents normalized pupil band.Mainly
The side-play amount of all wavelengths minimum seen near 0.707 pupil band, such as in this figure, in ripple of 0.84 pupil with 435.8nm and 656.3nm
Transverse axis distance about 0.04mm of the joining long to 486.1nm wavelength.
Fig. 3 is the astigmatism curve map of the wide-angle lens described in the embodiment of the present invention.Astigmatism figure represents design meridian and the sagitta of arc
The degrees of offset of the image field in direction and preferable image field.Transverse axis represents side-play amount, and the longitudinal axis represents half image height.As drawing system is entirely being regarded
Within 0.1, meridian and sagitta of arc curve maximum deviation are 0.05 or so for image field skew in the range of.
Fig. 4 is the distortion curve figure of the wide-angle lens described in the embodiment of the present invention.Distortion figure represents actual image height and ideal
The difference of image height.Transverse axis represents distortion percentage, and the longitudinal axis represents half image height.As seen from the figure the distortion of the system 1.2% with
Interior, in general human eye can not be identified the torsional deformation for shooting object.
Fig. 5 is the ratio chromatism, curve map of the wide-angle lens described in the embodiment of the present invention.Entirely regarded from system from the point of view of the figure
Field maximum is in 10 microns.
The system parameter setting of wide-angle lens of the invention is realized realizing focus with one group of lens movement, while preferably
Distortion and aberration are controlled, the lens of introducing are few, focusing load is small, focusing speed easily ensures, while camera lens small volume, cost
It is low, the purchase of production and sales and consumer beneficial to producer.
Preferable possible embodiments of the invention are these are only, is not limited the scope of the invention, it is all with the present invention
Equivalent structure change done by specification and accompanying drawing content, is all contained in protection scope of the present invention.
Claims (10)
1. a kind of wide-angle lens, it is characterised in that including the first lens group being sequentially distributed by thing side to image side along optical axis,
Two lens groups and image planes, wherein, first lens group includes the first lens, and system meets 0.12<EFL/TTL<
0.3, wherein EFL are the effective focal length of wide-angle lens, and TTL is the optics overall length of wide-angle lens.
2. wide-angle lens as claimed in claim 1, it is characterised in that first lens group is additionally included on optical axis successively
Second lens and the 3rd lens, wherein, the thing side of first lens with negative power is convex surface, and image side surface is recessed
Face；The thing side of the second lens with negative power is convex surface, and image side surface is concave surface；The 3rd lens with negative power
Thing side is convex surface, and image side surface is concave surface.
3. wide-angle lens as claimed in claim 2, it is characterised in that first lens group also includes the 4th lens, institute
State the 4th lens to be may move between thing side and image side relative to the 3rd lens, the stroke of the 4th lens meets：0.02<L/
H<0.07, wherein L are the total kilometres of the 4th lens, and H is system image planes size.
4. wide-angle lens as claimed in claim 2, it is characterised in that the 3rd lens are even aspheric surface lens.
5. the wide-angle lens as described in claim any one of 1-4, it is characterised in that first lens group also includes the 5th
Lens, the thing side of the 5th lens is convex surface, and image side surface is convex surface.
6. wide-angle lens as claimed in claim 5, it is characterised in that second lens group also includes the 6th lens and the
Seven lens, the 6th lens and the 7th lens are glued fixed.
7. wide-angle lens as claimed in claim 6, it is characterised in that the thing side of the 6th lens is concave surface, image side surface
It is concave surface；The thing side of the 7th lens is convex surface, and image side surface is convex surface.
8. wide-angle lens as claimed in claim 1, it is characterised in that second lens group also includes being located at described first
9th lens of the image side surface of lens group, the 9th lens are even aspheric surface lens, and the 9th lens meet 1.7<n
<1.9,30<λ<45, wherein n are the refractive index of glass, and λ is the Abbe number of glass.
9. wide-angle lens as claimed in claim 8, it is characterised in that also including being located at the 9th lens thing surveys face the 8th
Lens, the 8th lens have positive light coke, and the thing side of the 8th lens is convex surface, and image side surface is convex surface.
10. wide-angle lens as claimed in claim 1, it is characterised in that first lens group and the second lens group it
Between be provided with diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710296809.7A CN106932889B (en) | 2017-04-28 | 2017-04-28 | Wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710296809.7A CN106932889B (en) | 2017-04-28 | 2017-04-28 | Wide-angle lens |
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| Publication Number | Publication Date |
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| CN106932889A true CN106932889A (en) | 2017-07-07 |
| CN106932889B CN106932889B (en) | 2022-11-15 |
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ID=59437513
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710296809.7A Active CN106932889B (en) | 2017-04-28 | 2017-04-28 | Wide-angle lens |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728290A (en) * | 2017-11-02 | 2018-02-23 | 浙江舜宇光学有限公司 | Optical imaging system |
| WO2019085524A1 (en) * | 2017-11-02 | 2019-05-09 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN110328445A (en) * | 2019-07-12 | 2019-10-15 | 卡门哈斯激光科技（苏州）有限公司 | A kind of near-infrared monochromatie objective |
| CN116027520A (en) * | 2023-03-30 | 2023-04-28 | 深圳市东正光学技术股份有限公司 | Optical imaging system and optical imaging apparatus |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728290A (en) * | 2017-11-02 | 2018-02-23 | 浙江舜宇光学有限公司 | Optical imaging system |
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| CN110328445A (en) * | 2019-07-12 | 2019-10-15 | 卡门哈斯激光科技（苏州）有限公司 | A kind of near-infrared monochromatie objective |
| CN110328445B (en) * | 2019-07-12 | 2020-12-22 | 卡门哈斯激光科技（苏州）有限公司 | Near-infrared monochromatic objective lens |
| CN116027520A (en) * | 2023-03-30 | 2023-04-28 | 深圳市东正光学技术股份有限公司 | Optical imaging system and optical imaging apparatus |
| CN116027520B (en) * | 2023-03-30 | 2023-06-20 | 深圳市东正光学技术股份有限公司 | Optical imaging system and optical imaging apparatus |
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| CN106932889B (en) | 2022-11-15 |
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Address after: 518172 the whole floor of 6 / F, building 1, xinwujing Industrial Park, No. 32, cuibao Road, Baolong street, Longgang District, Shenzhen, Guangdong Province Applicant after: Shenzhen Dongzheng Optical Technology Co.,Ltd. Address before: 518116 east area, 10th floor, tianhengda Industrial Park, No. 2, Chengxin Road, Baolong Industrial Zone, Longgang street, Longgang District, Shenzhen, Guangdong Province Applicant before: SHENZHEN DZO OPTICS TECHNOLOGY Co.,Ltd. |
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