CN104880811B - A kind of camera - Google Patents
A kind of camera Download PDFInfo
- Publication number
- CN104880811B CN104880811B CN201510217770.6A CN201510217770A CN104880811B CN 104880811 B CN104880811 B CN 104880811B CN 201510217770 A CN201510217770 A CN 201510217770A CN 104880811 B CN104880811 B CN 104880811B
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- Prior art keywords
- lens
- camera
- refraction
- low
- convex surface
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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
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- 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
- G02B13/004—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 four lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The present invention relates to a kind of camera, including be arranged in order by thing side to image side：First lens, it is positive lens, with low-refraction；Second lens, it is negative lens, with high index of refraction；3rd lens, it is positive lens, with low-refraction；4th lens, it is negative lens, with low-refraction；The diaphragm of the camera is before first lens.Compared with prior art, the present invention uses four lens type structures of " positive and negative ", and four camera lenses are using the combination of refractive indices of " low height is low ", under conditions of extremely short optics overall length is met, all kinds of aberrations are effectively reduced, extraordinary correction especially has been carried out to transverse direction and longitudinal direction chromatic aberation.
Description
Technical field
The present invention relates to a kind of camera.
Background technology
With the popularization that develops rapidly of smart mobile phone, the research and development and design of camera are developed rapidly therewith, especially nearly two
Year, with the appearance of high-end intelligent machine, camera quality has been turned into an important indicator for basing oneself upon market.Traditional high-resolution
Rate camera (more than eight mega pixels) is typically made up of 5 lens, minority using 4 lens composition, for realize big visual field and
Short TTL, while meeting the requirement of the small F numbers of customer requirement, reduces spherical aberration, coma, astigmatism, the curvature of field, distortion and the color of camera lens
Difference is extremely important.
It is eccentric between manufacturing tolerance based on prior art, especially lens and lens, and lens are in an assembling process
The problems such as eccentric and PV changes resolving power caused by declines, distortion is become greatly is not enough caused with lens barrel fitness, is always
The problem of camera manufacturing industry is difficult to capture.
Present packaging technology is that lens barrel more than the bias between eyeglass, five mega pixels images to position dependent on black thing
Head, especially eight mega pixels or 1,003 mega pixel cameras can only typically optimize tolerance to the bias of eyeglass from design
To within 3um, and the manufacturing tolerance of lens barrel only up to ensure within 5um, ensure that 3um can not realize amount steady in a long-term once in a while
Production, the shipment to camera produces very big negative effect.
The camera lens of traditional design, for identical image planes size, TTL is that optics overall length is general longer, so typically can be with
Smoother light is obtained, helps to improve tolerance.But modern cell phones increasingly ultrathin, it is necessary to shorten TTL, this is when proactive
As head designs a main bugbear with producing.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of camera, with low aberrations.The present invention is realized in
's：
A kind of camera, including be arranged in order by thing side to image side：
First lens, it is positive lens, with low-refraction；
Second lens, it is negative lens, with high index of refraction；
3rd lens, it is positive lens, with low-refraction；
4th lens, it is negative lens, with low-refraction；
The diaphragm of the camera is before first lens.
Further, the thing side of first lens has convex surface, and image side has convex surface；The thing side tool of second lens
There is concave surface, image side has concave surface；The thing side of 3rd lens has concave surface, and image side has convex surface；The picture of 4th lens
It is convex surface outside concave surface, axle that the paraxial place in side, which is, and it is concave surface outside convex surface, axle that the paraxial place in thing side, which is,；3rd lens are that moon bending is saturating
Mirror.
Further, first lens to the 4th lens are sized non-spherical resin lens.
Further, the camera is 5,000,000 or eight mega pixels, and F/ST≤2.2；Wherein, F is the camera
Focal length, ST be the camera Entry pupil diameters.
Further, if F1, F2, F3, F4 are respectively the first lens, the second lens, the 3rd lens, Jiao of the 4th lens
Away from F is the focal length of camera, and V1, V2, V3, V4 are respectively the first lens, the second lens, the 3rd lens, the Abbe of the 4th lens
Count, then (F1*V1+F2*V2)/F<4；(F3*V3+F4*V4)/F<2.
Further, the maximum effective diameter edge thickness TE of the 4th lens and center thickness TC on axle meets following article
Part：
0.6<TC/TE<1.0；
Wherein, TE is maximum effective diameter edge thickness；TC is center thickness on axle.
Further, first lens to the distance and camera image planes of camera image planes highly meets following condition：
TTL/D≤0.8；
Wherein, TTL is distance of first lens to image planes；
D is camera image planes height.
Further, F1/F3<1.2；F2/F4<3；
Further, F1/F<1.
Compared with prior art, the present invention uses four lens type structures of " Negative-Positive-Negative-negative ", and four camera lenses are adopted
With the combination of refractive indices of " low-high-low-low ", all kinds of aberrations are effectively reduced, with good imaging effect.
Brief description of the drawings
Fig. 1：Camera of the present invention constitutes structural representation；
Fig. 2：Conventional lenses imaging optical path schematic diagram；
Fig. 3：Camera imaging light path schematic diagram of the present invention；
Fig. 4：The outer visual field point range figure of conventional lenses axle；
Fig. 5：Camera of the present invention is schemed in the Ray Fan of 0,0.2,0.4,0.6,0.8,1.0 visual fields respectively；
Fig. 6：Camera of the present invention is respectively in the point range figure of 0,0.2,0.4,0.6,0.8,1.0 visual fields；
Fig. 7：Camera curvature of field test chart of the present invention；
Fig. 8：Camera distortion test chart of the present invention；
Fig. 9：Camera lateral chromatic aberration test chart of the present invention；
Figure 10：Camera longitudianal aberration test chart of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.
As shown in figure 1, camera of the present invention include be arranged in order by thing side to image side the first lens 1, the second lens 2,
3rd lens 3 and the 4th lens 4.Wherein, the first lens 1 are positive lens, with low-refraction；Second lens 2 are negative lens, tool
There is high index of refraction；3rd lens 3 are positive lens, with low-refraction；4th lens 4 are negative lens, with low-refraction.Typically
For, refractive index 1.59 referred above to high index of refraction, in 1.55 hereinafter referred to as low-refractions.By it is this " Negative-Positive-Negative-
It is negative " quadruple lenses structure and " low-high-low-low " combination of refractive indices, can effectively reduce transverse direction and longitudinal direction chromatic aberation.Fig. 9
And Figure 10 is respectively camera lateral chromatic aberration of the present invention and longitudianal aberration test chart, it can be seen that the present invention takes the photograph
As head controls lateral chromatic aberration within 2um, by longitudianal aberration control within 0.05mm, color is inhibited well
Aberration.
First lens 1 have convex surface using thing side, and image side has the positive lens on convex surface；Second lens 2 are had using thing side
Concave surface, image side has negative lens with concave surfaces；3rd lens 3 have concave surface using thing side, and image side has the positive lens on convex surface；4th
Lens 4 use the paraxial place in image side for concave surface, are convex surface, the negative lens that it is concave surface outside convex surface, axle that the paraxial place in thing side, which is, outside axle.Together
When, the image side of the 4th lens 4 can use cucurbit face structure as shown in Figure 1, the i.e. thin top in middle part and bottom thick.First lens
1 to the 4th lens 4 use sized non-spherical resin lens.Non-spherical lens has the more preferably face type free degree, can maintain good
Lens error correction effect, to obtain required optical property.Non-spherical lens can bring outstanding acutance and Geng Gao resolution
Rate, while more frivolous than spherical lens so that the miniaturization of camera is possibly realized.
The camera is 5,000,000 or eight mega pixels, and F/ST≤2.2；Wherein, F is the focal length of the camera, and ST is
The Entry pupil diameters of the camera.If F1, F2, F3, F4 are respectively the first lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4
Focal length, F is the focal length of camera, and V1, V2, V3, V4 are respectively that the first lens 1, the second lens 2, the 3rd lens the 3, the 4th are saturating
The Abbe number of mirror 4, then (F1*V1+F2*V2)/F<4；(F3*V3+F4*V4)/F<2, meanwhile, the 4th lens 4 of the camera
Maximum effective diameter edge thickness TE meets following condition with center thickness TC on axle：
0.6<TC/TE<1.0；
Wherein, TE is maximum effective diameter edge thickness；TC is center thickness on axle.
Fig. 2 and Fig. 3 are respectively conventional lenses and camera imaging light path schematic diagram of the present invention, it can be seen that the present invention takes the photograph
As head can be focused on more accurately compared with conventional lenses.
In terms of eccentric correction, camera of the present invention uses the first lens 1 and the Combination Design of the second lens 2, the 3rd lens 3
Optimized with the multiplet of the Combination Design of the 4th lens 4.The eccentric allowance of the first lens 1 of camera is 2um, and second is saturating
The eccentric allowance of mirror 2 is 3.5um, and the eccentric allowance of the 3rd lens 3 is 4um, and the eccentric allowance of the 4th lens 4 is 6um.
During bias correction the first lens 1 need to be made to be zero with the overall bias that the second lens 2 are combined, the 3rd lens 3 are combined with the 4th lens 4
Overall bias be zero.The present invention pays the utmost attention to the tolerance sensitivities of first eyeglass.When the first lens 1, the second lens 2,
Three lens 3, the 4th lens 4 are when group enters lens barrel successively, by manufacture tolerances, the second lens 2, the 3rd lens 3, the 4th lens 4
Lens barrel bias increase successively, the eccentricity of glasses lens of such first lens 1 will be minimum, by eccentricity pressure collection during Tolerance Optimization
In on the first lens 1, so as to reduce the eccentric tolerance of other eyeglasses, especially reduce the eccentric tolerance of the 4th lens 4, from
And reduce the curvature of field and the distortion of camera.
When being designed using Zemax softwares, power specifically can be rationally aggravated by using operands such as FCGT, FCGS
Weight, makes the curvature of field, distortion tends to be reasonable.Fig. 7 and Fig. 8 are respectively the camera curvature of field of the present invention and distortion test chart, pass through above-mentioned side
The optimization of method can make aberration control within 2%, by curvature of field control within 0.05mm.
The present invention is also optimized by the Ray-Fan figures to camera, forces balance to be taken the photograph by DXDX, DYDY operand
As the Ray Fan of head scheme.Fig. 5, which show Ray Fan of the camera respectively in 0,0.2,0.4,0.6,0.8,1.0 visual fields, to scheme, Fig. 6
Camera is shown respectively in the point range figure of 0,0.2,0.4,0.6,0.8,1.0 visual fields.Forced by Ray Fan figures after optimization
Camera obtains good imaging characteristic.Fig. 4 show the outer visual field point range figure of conventional lenses axle, it can be seen that the visual field outside axle
Form comet formation hangover.
If TTL is distance of first lens 1 to image planes 5, D is the height of camera image planes 5, then in camera of the present invention,
TTL/D≤0.8, F1/F3<1.2, F2/F4<3, F1/F<1.Also F1 can be caused by design>F3, may be such that camera has big
Visual angle, while keeping short TTL.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (8)
1. a kind of camera, it is characterised in that including what is be arranged in order by thing side to image side：
First lens, it is positive lens, with low-refraction, and the low-refraction is the refractive index less than 1.55；
Second lens, it is negative lens, with high index of refraction, and the high index of refraction is the refractive index more than 1.59；
3rd lens, it is positive lens, with low-refraction；
4th lens, it is negative lens, with low-refraction；
The diaphragm of the camera is before first lens；
If F1, F2, F3, F4 are respectively the first lens, the second lens, the 3rd lens, the focal length of the 4th lens, F is camera
Focal length, V1, V2, V3, V4 are respectively the first lens, the second lens, the 3rd lens, the Abbe number of the 4th lens, then (F1*V1+
F2*V2)/F<4；(F3*V3+F4*V4)/F<2.
2. camera as claimed in claim 1, it is characterised in that the thing side of first lens has convex surface, and image side has
Convex surface；The thing side of second lens has concave surface, and image side has concave surface；The thing side of 3rd lens has concave surface, image side
With convex surface；The paraxial place in image side of 4th lens is concave surface, is convex surface outside axle, and it outside convex surface, axle is recessed that the paraxial place in thing side, which is,
Face；3rd lens are moon bending lens.
3. camera as claimed in claim 1, it is characterised in that first lens to the 4th lens are sized non-spherical resin
Lens.
4. camera as claimed in claim 1, it is characterised in that the camera is 5,000,000 or eight mega pixel, and F/
ST≤2.2；Wherein, F is the focal length of the camera, and ST is the Entry pupil diameters of the camera.
5. camera as claimed in claim 1, it is characterised in that the maximum effective diameter edge thickness TE of the 4th lens with
Center thickness TC meets following condition on axle：
0.6<TC/TE<1.0；
Wherein, TE is maximum effective diameter edge thickness；TC is center thickness on axle.
6. camera as claimed in claim 3, it is characterised in that distance and shooting of first lens to camera image planes
Head portrait face highly meets following condition：
TTL/D≤0.8；
Wherein, TTL is distance of first lens to image planes；
D is camera image planes height.
7. the camera as described in claim any one of 2-6, it is characterised in that F1/F3<1.2；F2/F4<3.
8. the camera as described in claim any one of 2-6, it is characterised in that F1/F<1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217770.6A CN104880811B (en) | 2015-04-30 | 2015-04-30 | A kind of camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217770.6A CN104880811B (en) | 2015-04-30 | 2015-04-30 | A kind of camera |
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| Publication Number | Publication Date |
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| CN104880811A CN104880811A (en) | 2015-09-02 |
| CN104880811B true CN104880811B (en) | 2017-10-17 |
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| CN201510217770.6A Expired - Fee Related CN104880811B (en) | 2015-04-30 | 2015-04-30 | A kind of camera |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI604218B (en) * | 2016-09-30 | 2017-11-01 | 大立光電股份有限公司 | Optical imaging lens system, image capturing unit and electronic device |
| CN106454325A (en) * | 2016-10-12 | 2017-02-22 | 芜湖赋兴光电有限公司 | Mobile phone camera module distortion test method |
| CN110596856B (en) * | 2019-08-16 | 2021-07-30 | 诚瑞光学(常州)股份有限公司 | Image pickup optical lens |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101503396B1 (en) * | 2009-02-16 | 2015-03-18 | 삼성테크윈 주식회사 | Lens system |
| US8988795B2 (en) * | 2010-09-10 | 2015-03-24 | Genius Electronic Optical Co., Ltd. | Imaging lens |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101364974B1 (en) * | 2012-04-06 | 2014-02-20 | 주식회사 코렌 | Photographic lens optical system |
| CN202758129U (en) * | 2012-08-01 | 2013-02-27 | 三洋电机株式会社 | Camera lens and camera device |
| JP2015102849A (en) * | 2013-11-28 | 2015-06-04 | カンタツ株式会社 | Image capturing lens |
| CN204731476U (en) * | 2015-04-30 | 2015-10-28 | 深圳市霸王贝思特光学有限公司 | Camera |
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2015
- 2015-04-30 CN CN201510217770.6A patent/CN104880811B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101503396B1 (en) * | 2009-02-16 | 2015-03-18 | 삼성테크윈 주식회사 | Lens system |
| US8988795B2 (en) * | 2010-09-10 | 2015-03-24 | Genius Electronic Optical Co., Ltd. | Imaging lens |
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| CN104880811A (en) | 2015-09-02 |
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Effective date of registration: 20190228 Address after: 313100 No. 5-11, Changhe Road, Paixi Street, Changxing County, Huzhou City, Zhejiang Province Patentee after: Zhejiang Nalan Optical Technology Co., Ltd. Address before: 518000 West Development Zone on the East Side of Guangshen Road, Xixiang Street, Baoan District, Shenzhen City, Guangdong Province, 3 buildings, 2 floors and 6 floors Patentee before: Overlord Bei Site Optical Co., Ltd of Shenzhen |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20171017 Termination date: 20210430 |