CN105259640B - A kind of interchangeable camera lens and including the camera lens without anti-digital camera - Google Patents
A kind of interchangeable camera lens and including the camera lens without anti-digital camera Download PDFInfo
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- CN105259640B CN105259640B CN201510745182.XA CN201510745182A CN105259640B CN 105259640 B CN105259640 B CN 105259640B CN 201510745182 A CN201510745182 A CN 201510745182A CN 105259640 B CN105259640 B CN 105259640B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
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- 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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Abstract
The invention discloses a kind of interchangeable lens and including the camera lens without anti-digital camera, the wherein camera lens includes the first lens group with negative index, the second lens group with positive refracting power and the 3rd lens group with negative index sequentially arranged；First lens group is located at close to object space side, and the 3rd lens group is located at close to image side.The camera lens of the present invention has the advantages that super large aperture and good imaging quality.
Description
Technical field
The present invention relates to phtographic lens technical fields, and in particular to a kind of interchangeable camera lens and including the camera lens without anti-
Digital camera, more particularly, to a kind of without anti-digital camera super large aperture silent frame interchangeable lens.
Background technology
At present, no anti-digital camera be it is a kind of can exchange camera lens, the camera by LCD live views, since it is compared
Have many advantages, such as in common slr camera small, light-weight, and there is pixel height etc., city compared to conventional cards machine
Field occupation rate is higher and higher.
No anti-digital camera due to being a kind of emerging product, in the market suitable for this kind of product interchangeable camera lens still
Fewer, and the existing aperture without anti-camera lens is smaller, for example, camera lens as shown in Figure 1 is by nine pieces of lens groups
Into, the aperture maximum i.e. F2.0 of the camera lens of focal length 35mm, so when blurring with being shot under dim light, it can be slightly insufficient,
Image quality is poor, is not suitable for the application field of high-end photography.
The content of the invention
Therefore, the technical problem to be solved in the present invention be it is of the prior art without anti-digital camera lens virtualization and it is weak
Image quality is poor when being shot under light.
For this purpose, a kind of interchangeable camera lens of the present invention, including the first lens group with negative index sequentially arranged,
First lens group includes the first double-concave negative lens 1, has the second lens group of positive refracting power, and the second lens group includes sequentially arranging
The first biconvex positive lens 2, the second biconvex positive lens 3 and the first balsaming lens, the first biconvex positive lens 2 are located at close to object space
Side, the first balsaming lens are located at close to image side：First balsaming lens is by the 3rd biconvex positive lens 4 and the second double-concave negative lens 5
It forms, the 3rd biconvex positive lens 4 are located at close to object space side, and the second double-concave negative lens 5 are located at close to image side：
With the 3rd lens group with negative index, the 3rd lens group is by the 3rd negative lens 6, aspherical sequentially arranged
Microscope group and the second balsaming lens are formed, and the 3rd negative lens is located at close to object space side, and the second balsaming lens is located at close to image side：It is non-
Spherical lens group is made of the first non-spherical lens 7 sequentially arranged and the second non-spherical lens 8, the first non-spherical lens 7
In close to object space side, the second non-spherical lens 8 is located at close to image side：Second balsaming lens by the 4th biconvex sequentially arranged just
9 and the 4th negative lens 10 of lens is formed, and the 4th biconvex positive lens are located at close to object space side, and the 4th negative lens is located at close to image space
Side：3rd negative lens 6, the first non-spherical lens 7, the second non-spherical lens 8 and the 4th negative lens 10 are that object side is concave surface
Meniscus lens；
Wherein, the following conditions are met：
1≤|f1|/fw≤1.2
Wherein, f1Represent the focal length of first lens group, fwRepresent the focal length of the interchangeable camera lens.
Preferably, the interchangeable camera lens also meets the following conditions：
0.7≤f2/fw≤1
Wherein, f2Represent the focal length of second lens group.
Preferably, first lens group includes the first double-concave negative lens, the focal length f of first double-concave negative lens11It is full
Foot：
-42mm≤f11≤-35mm。
Preferably, second lens group includes the first biconvex positive lens sequentially arranged, the second biconvex positive lens and the
One balsaming lens；First biconvex positive lens are located at close to object space side, and first balsaming lens is located at close to image side；
The focal length f of first biconvex positive lens21Meet：60mm≤f21≤65mm；
The focal length f of second biconvex positive lens22Meet：35mm≤f22≤45mm；
The focal length f of first balsaming lens23Meet：-155mm≤f23≤-145mm。
Preferably, first balsaming lens includes the 3rd positive lens and the second negative lens；3rd positive lens is located at
Close to object space side, second negative lens is located at close to image side.
Preferably, it is glued to include the 3rd negative lens sequentially arranged, non-spherical lens group and second for the 3rd lens group
Lens；3rd negative lens is located at close to object space side, and second balsaming lens is located at close to image side；
The focal length f of 3rd negative lens31Meet：-75mm≤f31≤-70mm；
The focal length f of second balsaming lens32Meet：50mm≤f32≤60mm。
Preferably, the non-spherical lens group includes the first non-spherical lens and the second non-spherical lens sequentially arranged；
First non-spherical lens is located at close to object space side, and second non-spherical lens is located at close to image side.
Preferably, second balsaming lens includes the 4th biconvex positive lens and the 4th negative lens sequentially arranged；It is described
4th biconvex positive lens are located at close to object space side, and the 4th negative lens is located at close to image side.
Preferably, it is additionally provided with aperture diaphragm between second lens group and the 3rd lens group.
Preferably, the interchangeable camera lens is focal length 35mm, the interchangeable camera lens of aperture F1.2.
The present invention's is a kind of without anti-digital camera, including above-mentioned interchangeable camera lens.
Technical solution of the present invention has the following advantages that：
1. interchangeable camera lens provided in an embodiment of the present invention by using negative, positive, negative structural shape, makes its structure
It is compacter, and then the volume of camera lens is reduced, the weight of camera lens is alleviated, especially suitable for without anti-digital camera.And lead to
Cross setting 1≤| f1|/fw≤ 1.2, so as to increase incident amount of light as far as possible in the case of short focus, ensure
The image of good imaging quality can be obtained under virtualization and low light condition, the design for meeting the super large aperture of interchangeable camera lens will
It asks.
2. interchangeable camera lens provided in an embodiment of the present invention, by setting 0.7≤f2/fw≤ 1, and cooperation 1≤| f1|/
fw≤ 1.2 setting, light beam by after first, second lens group can by incident beam reduced width, so as to for it is subsequent into
As lens group, (structure design of the 3rd lens group obtains volume smaller and provides advantage, and can also further meet can
The super large aperture design requirement of switch type camera lens ensure that captured image has outstanding image quality and virtualization effect,
So as to further improve image quality.
3. interchangeable camera lens provided in an embodiment of the present invention by using balsaming lens, can be further simplified camera lens
Structure, to reduce its volume, mitigate its weight.It is just saturating by designing the first negative lens, the first biconvex positive lens, the second biconvex
Mirror, the first balsaming lens, the 3rd negative lens, the scope of the second balsaming lens focal length, can be with by the mutual cooperation between them
Further expand the aperture of camera lens, meet wide-angle, the design requirement of super large aperture.The global design of this camera lens causes compared with other
The MTF performances of similar camera lens are more excellent, and distortion, aberration etc. are smaller, so as to further improve image quality.
It, can by the cooperation of this positive and negative lens in balsaming lens 4. interchangeable camera lens provided in an embodiment of the present invention
To correct paraxial spherical aberration, aberration is corrected, further improves image quality.By introducing non-spherical lens, avoid because complete
The larger spherical aberration that portion is generated using spherical mirror, so as to improve image quality.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the lens structure schematic diagram of the anti-digital camera lens of list of the prior art；
Fig. 2 is the lens structure schematic diagram of a specific example of interchangeable camera lens in the embodiment of the present invention 1；
Fig. 3 is the lens surface distribution schematic diagram of a specific example of interchangeable camera lens in the embodiment of the present invention 1；
Fig. 4 is focal length 35mm, the MTF figures of the interchangeable camera lens of aperture F1.2；
Fig. 5 is focal length 35mm, the lateral chromatic aberration figure of the interchangeable camera lens of aperture F1.2；
Fig. 6 is focal length 35mm, the relative illumination figure of the interchangeable camera lens of aperture F1.2.
Reference numeral：I-the first lens group, II-the second lens group, III-the three lens group, the first double-concave negative lens of 1-, 2-
First biconvex positive lens, the second biconvex positive lens of 3-, the 3rd biconvex positive lens of 4-, the second double-concave negative lens of 5-, 6- the 3rd are negative
Mirror, the first non-spherical lenses of 7-, the second non-spherical lenses of 8-, the 4th biconvex positive lens of 9-, the 4th negative lenses of 10-, 11- aperture lights
Door screen, 12- screens.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's all other embodiments obtained without making creative work, belong to the scope of protection of the invention.
In the description of the present invention, it is necessary to which the orientation of the instructions such as explanation, term "left", "right" or position relationship are base
In orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or imply
Signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that this
The limitation of invention.In addition, term " first ", " second ", " the 3rd " etc. are only used for description purpose, and it is not intended that instruction or dark
Show relative importance.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It can be combined with each other into conflict.
Embodiment 1
The present embodiment provides a kind of interchangeable camera lens, such as suitable for without anti-digital camera, as shown in Fig. 2, left is
Object space side, right are image side, and light beam is ultimately imaged from left incidence on the screen 12 of right.Have including what is sequentially arranged
First lens group of negative index, the first lens group include the first double-concave negative lens, second lens group with positive refracting power, the
Two lens groups include the first biconvex positive lens, the second biconvex positive lens and the first balsaming lens sequentially arranged, and the first biconvex is just
Lens are located at close to object space side, and the first balsaming lens is located at close to image side：First balsaming lens by the 3rd biconvex positive lens and
Second double-concave negative lens are formed, and the 3rd biconvex positive lens are located at close to object space side, and the second double-concave negative lens are located at close to image side：
With the 3rd lens group with negative index, the 3rd lens group is by the 3rd negative lens, aspherical sequentially arranged
Microscope group and the second balsaming lens are formed, and the 3rd negative lens is located at close to object space side, and the second balsaming lens is located at close to image side：It is non-
Spherical lens group is made of the first non-spherical lens sequentially arranged and the second non-spherical lens, and the first non-spherical lens, which is located at, to be leaned on
Nearly object space side, the second non-spherical lens are located at close to image side：Second balsaming lens is by the 4th biconvex positive lens sequentially arranged
It is formed with the 4th negative lens, the 4th biconvex positive lens are located at close to object space side, and the 4th negative lens is located at close to image side：3rd is negative
Lens, the first non-spherical lens, the second non-spherical lens and the 4th negative lens are the meniscus lens that object side is concave surface；
Wherein, the following conditions are met：
1≤|f1|/fw≤1.2
Wherein, f1Represent the focal length of first lens group I, fwRepresent the focal length of the interchangeable camera lens.
Above-mentioned interchangeable camera lens by using negative, positive, negative structural shape, makes its structure compacter, and then reduces
The volume of camera lens alleviates the weight of camera lens, especially suitable for without anti-digital camera.And by set 1≤| f1|/fw≤
1.2, so as to increase incident amount of light as far as possible in the case of short focus, ensure blurring and energy under low light condition
The image of good imaging quality is enough obtained, meets the design requirement of the super large aperture of interchangeable camera lens.
Preferably, above-mentioned interchangeable camera lens also meets the following conditions：0.7≤f2/fw≤ 1, wherein, f2Represent described
The focal length of two lens groups II.By setting 0.7≤f2/fw≤ 1, and cooperation 1≤| f1|/fw≤ 1.2 setting, light beam pass through
It first, can be by incident beam reduced width, so as to be the subsequent imaging lens group (structure of the 3rd lens group after the second lens group
It is designed volume smaller and provides advantage, and the super large aperture design that can also further meet interchangeable camera lens will
It asks, ensure that captured image has outstanding image quality and virtualization effect, so as to further improve image quality.
Preferably, aperture diaphragm 11 is additionally provided between the second lens group II and the 3rd lens group III, imaging can be improved
Clarity and brightness.
Preferably, the first lens group I of above-mentioned interchangeable camera lens includes the first double-concave negative lens 1, the second lens group II
Including the first biconvex positive lens 2, the second biconvex positive lens 3 and the first balsaming lens sequentially arranged；First biconvex positive lens 2
In close to object space side, the first balsaming lens is located at close to image side, and the 3rd lens group III includes the 3rd negative lens sequentially arranged
6th, non-spherical lens group and the second balsaming lens；3rd negative lens 6 is located at close to object space side, and the second balsaming lens is located at close to picture
Square side.
The focal length f of first double-concave negative lens 111Meet：-42mm≤f11≤-35mm。
The focal length f of first biconvex positive lens 221Meet：60mm≤f21≤65mm；
The focal length f of second biconvex positive lens 322Meet：35mm≤f22≤45mm；
The focal length f of first balsaming lens23Meet：-155mm≤f23≤-145mm；
The focal length f of 3rd negative lens 631Meet：-75mm≤f31≤-70mm；
The focal length f of second balsaming lens32Meet：50mm≤f32≤60mm。
The aspherical mode of non-spherical lens in non-spherical lens group can be represented by following formula：
Wherein, parameter R, K, AR4, AR6, AR8, AR10, AR12, AR14 is asphericity coefficient, can be obtained as needed
Aspherical shape and be adjusted.
Above-mentioned interchangeable camera lens by using balsaming lens, can be further simplified the structure of camera lens, to reduce its body
Product, mitigates its weight.By designing the first double-concave negative lens, the first biconvex positive lens, the second biconvex positive lens, the first gluing thoroughly
Mirror, the 3rd negative lens, the scope of the second balsaming lens focal length, can further magnascope by the mutual cooperation between them
The aperture of head, meets wide-angle, the design requirement of super large aperture.The global design of this camera lens causes compared with other similar camera lenses
MTF performances are more excellent, and distortion, aberration etc. are smaller, so as to further improve image quality.
It is further preferred that the first balsaming lens includes the 3rd positive lens 4 and the second negative lens 5；3rd positive lens is located at
Close to object space side, the second negative lens is located at close to image side.
Non-spherical lens group includes the first non-spherical lens 7 and the second non-spherical lens 8 sequentially arranged；First is aspherical
Lens 7 are in close to object space side, and the second non-spherical lens 8 is in close to image side.
Second balsaming lens includes the 4th biconvex positive lens 9 and the 4th negative lens 10 sequentially arranged；4th biconvex is just saturating
Mirror 9 is in close to object space side, and the 4th negative lens 10 is close to image side.
Above-mentioned interchangeable camera lens by the cooperation of this positive and negative lens in balsaming lens, can correct paraxial spherical aberration,
Aberration is corrected, further improves image quality.By introducing non-spherical lens, avoid and produce because all using spherical mirror due to
Raw larger spherical aberration, so as to improve image quality.
A kind of numerical example of above-mentioned interchangeable camera lens will be specifically introduced below, as shown in figure 3, surface number from left to right
Respectively r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15, r16, r17, r18, concrete numerical value
It is as shown in the table, unit：mm.
Material type in upper table is the material type in glass storehouse in simulation software, such as ZEMAX simulation softwares, different
Material type embody different refractive index.
The asphericity coefficient of first non-spherical lens 7 is as shown in the table：
| Asphericity coefficient | r12 | r13 |
| R | -19.229±0.02 | -11.135±0.01 |
| K | -1 | -1 |
| AR4 | -8.6579e-005 | 1.3912e-004 |
| AR6 | 9.8817e-007 | 9.7332e-007 |
| AR8 | 3.6718e-008 | 3.0973e-009 |
| AR10 | -6.7101e-010 | -1.6643e-010 |
| AR12 | 4.6474e-012 | 1.153e-012 |
| AR14 | -1.1905e-014 | -2.1893e-015 |
The asphericity coefficient of second non-spherical lens 8 is as shown in the table：
Focal length 35mm, the aperture F1.2 of above-mentioned interchangeable camera lens are a kind of professional, high-end phtographic lenses of silent frame.
It will be understood by those of skill in the art that the numerical example of the interchangeable camera lens of focal length 35mm, aperture F1.2 is not limited to above-mentioned number
It is worth example, the silent frame interchangeable camera lens of focal length 35mm, aperture F1.2 can be also realized by other numerical examples.
As shown in figure 4, the diagonal half for defining CMOS effective areas is maximum image height, 1.0 visual fields are set to, to measure not
With the spatial frequency of image height, 0.8 visual field, 0.6 visual field, 0 visual field are taken.The interchangeable camera lens of Fig. 4 mid-focal lengths 35mm, aperture F1.2
CMOS diagonal half be 21.32mm, i.e. 1.0 visual fields image height, the image height of 0.8 visual field is 21.32 × 0.8=
17.056mm, the image height of 0.6 visual field is 21.32 × 0.6=12.792mm, and the image height of 0 visual field is 0mm, is CMOS central points.
As shown in figure 5, the lateral chromatic aberration of the interchangeable camera lens blue light of focal length 35mm, aperture F1.2 is 0.0016mm, it is red
The lateral chromatic aberration of light is 0.0048mm, the equal very little of red, blue light lateral chromatic aberration and the two difference is also very small, have it is excellent into
As characteristic.
As shown in fig. 6, the relative illumination at the edge of the interchangeable camera lens of focal length 35mm, aperture F1.2 reach 10% with
On, meet imaging performance requirement.
Embodiment 2
The present embodiment provides a kind of without anti-digital camera, including the interchangeable camera lens in embodiment 1.It is commutative using this
Formula camera lens has the advantages that image quality height etc. without anti-digital camera, and since camera lens has super large aperture, captured figure
As having outstanding virtualization effect, under low light environment, shutter speed can be improved, it is easier to shoot good photo, especially
It is used suitable for professional photography.
Obviously, the above embodiments are merely examples for clarifying the description, and is not intended to limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And the obvious variation thus extended out or
Among changing still in the protection domain of the invention.
Claims (7)
1. a kind of interchangeable camera lens, which is characterized in that including the first lens group with negative index sequentially arranged, first
Lens group includes the first double-concave negative lens (1), has the second lens group of positive refracting power, and the second lens group includes what is sequentially arranged
First biconvex positive lens (2), the second biconvex positive lens (3) and the first balsaming lens, the first biconvex positive lens (2) are located at close to object
Square side, the first balsaming lens are located at close to image side：First balsaming lens is born by the 3rd biconvex positive lens (4) and the second concave-concave
Mirror (5) is formed, and the 3rd biconvex positive lens (4) are located at close to object space side, and the second double-concave negative lens (5) are located at close to image side：
With the 3rd lens group with negative index, the 3rd lens group is by the 3rd negative lens (6), the non-spherical lens sequentially arranged
Group and the second balsaming lens are formed, and the 3rd negative lens is located at close to object space side, and the second balsaming lens is located at close to image side：Aspheric
Face lens group is made of the first non-spherical lens (7) and the second non-spherical lens (8) sequentially arranged, the first non-spherical lens
(7) it is located at close to object space side, the second non-spherical lens (8) is located at close to image side：Second balsaming lens by sequentially arrange
Four biconvex positive lens (9) and the 4th negative lens (10) are formed, and the 4th biconvex positive lens are located at close to object space side, the 4th negative lens position
In close to image side：3rd negative lens (6), the first non-spherical lens (7), the second non-spherical lens (8) and the 4th negative lens
(10) it is meniscus lens of the object side for concave surface；
Wherein, the following conditions are met：
1≤|f1|/fw≤1.2
Wherein, f1Represent the focal length of first lens group, fwRepresent the focal length of the interchangeable camera lens；
First lens group includes the first double-concave negative lens, the focal length f of first double-concave negative lens11Meet：
-42mm≤f11≤-35mm。
2. interchangeable camera lens according to claim 1, which is characterized in that the interchangeable camera lens also meets following item
Part：
0.7≤f2/fw≤1
Wherein, f2Represent the focal length of second lens group.
3. according to claim 1-2 any one of them interchangeable camera lenses, which is characterized in that
The focal length f of first biconvex positive lens21Meet：60mm≤f21≤65mm；
The focal length f of second biconvex positive lens22Meet：35mm≤f22≤45mm；
The focal length f of first balsaming lens23Meet：-155mm≤f23≤-145mm。
4. interchangeable camera lens according to claim 3, which is characterized in that
The focal length f of 3rd negative lens31Meet：-75mm≤f31≤-70mm；
The focal length f of second balsaming lens32Meet：50mm≤f32≤60mm。
5. interchangeable camera lens according to claim 4, which is characterized in that second lens group and the 3rd lens group it
Between be additionally provided with aperture diaphragm.
6. interchangeable camera lens according to claim 5, which is characterized in that the interchangeable camera lens for focal length 35mm,
The interchangeable camera lens of aperture F1.2.
It is 7. a kind of without anti-digital camera, which is characterized in that including such as claim 1-6 any one of them interchangeable camera lens.
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| CN201510745182.XA CN105259640B (en) | 2015-11-03 | 2015-11-03 | A kind of interchangeable camera lens and including the camera lens without anti-digital camera |
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| US11372208B2 (en) | 2017-05-27 | 2022-06-28 | Zhejiang Sunny Optical Co., Ltd | Imaging lens assembly |
| CN113703131B (en) * | 2021-07-19 | 2022-08-16 | 中国科学院福建物质结构研究所 | Full-frame single-lens reflex lens |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164004A (en) * | 2005-04-22 | 2008-04-16 | 柯尼卡美能达精密光学株式会社 | Variable power optical system, imaging lens system and digital apparatus |
| CN102411195A (en) * | 2010-09-22 | 2012-04-11 | 株式会社尼康 | Imaging Lens, Optical Device Equipped With The Imaging Lens And Method Used For Manufacturing The Imaging Lens |
| CN205121049U (en) * | 2015-11-03 | 2016-03-30 | 中山市思锐摄影器材工业有限公司 | Commutative formula camera lens reaches no anti - digital camera including this camera lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7626768B2 (en) * | 2006-02-13 | 2009-12-01 | Casio Computer Co., Ltd. | Zoom lens and camera with zoom lens |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164004A (en) * | 2005-04-22 | 2008-04-16 | 柯尼卡美能达精密光学株式会社 | Variable power optical system, imaging lens system and digital apparatus |
| CN102411195A (en) * | 2010-09-22 | 2012-04-11 | 株式会社尼康 | Imaging Lens, Optical Device Equipped With The Imaging Lens And Method Used For Manufacturing The Imaging Lens |
| CN205121049U (en) * | 2015-11-03 | 2016-03-30 | 中山市思锐摄影器材工业有限公司 | Commutative formula camera lens reaches no anti - digital camera including this camera lens |
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