CN108535851A - Nothing surpasses in reverse wide-angle zoom lens - Google Patents
Nothing surpasses in reverse wide-angle zoom lens Download PDFInfo
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- CN108535851A CN108535851A CN201810600134.5A CN201810600134A CN108535851A CN 108535851 A CN108535851 A CN 108535851A CN 201810600134 A CN201810600134 A CN 201810600134A CN 108535851 A CN108535851 A CN 108535851A
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- 238000011982 device technology Methods 0.000 abstract description 2
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
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- Optics & Photonics (AREA)
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Abstract
The invention belongs to field of optical device technology, and in particular to a kind of nothing surpasses in reverse wide-angle zoom lens, includes the third lens group G3 of negative first lens group G1 of diopter, the second lens group G2 of positive diopter, positive diopter successively to image planes side from object side；Wherein, in the third lens group G3, by image planes it is nearest be one group of negative diopter negative and positive cemented doublet, the focal length of the negative and positive cemented doublet of the negative diopter is B03；First lens group G1, the second lens group G2 and the third lens group G3 realizes zoom by changing each group group distance, when object is mobile to short distance from infinity, the first lens group G1 and the third lens group G3 is kept fixed, and the second lens group G2 is moved to image planes side and realized focus；And it satisfies the following conditional expression：0.45≤|F1/WI|≤0.75；0.7≤|B03/WI|≤1.2；0.45≤|Tw/WI|≤0.75；The present invention realizes a kind of miniaturization, high-performance, the wide-angle side of low cost draw the ultra-wide angle zoom lens that angle is more than 120 °.
Description
Technical field
The invention belongs to field of optical device technology, and in particular to a kind of nothing surpasses in reverse wide-angle zoom lens.
Background technology
Wide-angle lens, also known as short-focus lens are exactly briefly station on same position, and wide-angle can shoot bigger
Area, wide-angle lens is very short,, more can be in addition to that can shoot more scenery so the scenery projected on egative film just becomes smaller
The image of broad angle is shot under narrow environment.Currently, the wide-angle lens that well known wide-angle side picture angle is more than 120 ° is all
It is relatively more with the structure that negative diopter starts, such as well known Japanese Unexamined Patent Publication 2013-15621 patents, from object side,
By negative the first lens set of diopter, multigroup ingredient such as second lens set of positive diopter is constituted, wherein there are two portions for the first component
Point, latter half plays the role of focus, because separately design, mechanical structure are more complicated in group；Meanwhile because focus is to move
Dynamic, certain spatial margin is needed, the volumetric spaces of such first lens set just have to increase, and lead to entire camera lens
Preceding group huge, is difficult to realize the bugeye lens of miniaturization, cost is caused to increase, and manufacture difficulty increases.
For another example well known Japanese Unexamined Patent Publication 2015-203736 patents, from object side, by negative the first eyeglass of diopter
Group, bears diopter the second lens set, positive monolithic eyeglass third lens set, the 4th lens set of positive diopter, and the of positive diopter
Five lens sets, the 6th positive lens set are constituted, and when object is mobile to short distance from infinity, third group monolithic lens set is to image planes
Focus is realized in direction movement.Although this structure realizes lighter focus group structure, but up to 6 groups of zoom group, structure
Complexity, it is of high cost, it is not easy to realize, while volume is also huge, is difficult to realize compact, inexpensive requirement.
Invention content
For the problems of the prior art, the purpose of the present invention is to provide a kind of nothings to surpass in reverse wide-angle zoom lens so that
Wide-angle side draws the ultra-wide angle zoom lens that angle is more than 120 ° and realizes miniaturization, high-performance and low cost entirely.
To achieve the goals above, the present invention is achieved by the following scheme：
A kind of nothing surpasses in reverse wide-angle zoom lens, includes the first lens group of negative diopter successively to image planes side from object side
The third lens group G3 of G1, the second lens group G2 of positive diopter, positive diopter；
Wherein, in the third lens group G3, by image planes it is nearest be one group of negative diopter negative and positive cemented doublet, it is described negative
The focal length of the negative and positive cemented doublet of diopter is B03；
First lens group G1, the second lens group G2 and the third lens group G3 is by changing each group group distance come real
Existing zoom, when object is mobile to short distance from infinity, the first lens group G1 and the third lens group G3 are kept fixed,
And the second lens group G2 is moved to image planes side and is realized focus；And it satisfies the following conditional expression：
0.45≤|F1/WI|≤0.75 (1)；
0.7≤|B03/WI|≤1.2 (2)；
0.45≤|Tw/WI|≤0.75 (3)；
Wherein, F1：The focal length of first lens group G1；
WI：When the state of infinity, the paraxial image height of maximum of wide-angle side；
B03：There is in the third lens group G3 near image planes the focal length of the negative and positive cemented doublet of negative diopter；
Tw：Under the state of infinity, the airspace of the first lens group G1 and the second lens group G2 of wide-angle side.
Further, in the first lens group G1 that the nothing surpasses in reverse wide-angle zoom lens, since object side, by continuous
4 negative diopter lens and several positive diopter eyeglasses composition；Wherein, continuous 4 negative diopter lens since object side
Synthesis focal length is F14, and the synthesis focal length F14 meets：
0.15≤|F14/WI|≤0.35 (4)
Wherein, F14：Since object side, the synthesis focal length of continuous 4 negative diopter lens in the first lens group G1；
WI：When the state of infinity, the paraxial image height of maximum of wide-angle side.
Further, the focal length F1 of the first lens group G1 under the state of infinity, the optical system focal length Ft of telescope end
Meet following formula：
1≤|Ft/F1|≤2 (5)。
In the present invention, if it exceeds the upper limit of conditional (1), that is to say, that the focal length of the first lens group G1 is excessive, dioptric
Degree is too weak, can not play the effect of miniaturization；And more than the lower limit of conditional (1), although miniaturization can be realized, due to
The diopter of first lens group G1 is too strong, and aberration correction can be caused extremely difficult, hardly results in high performance wide-angle zoom lens
Effect.
If it exceeds if the upper limit of conditional (2), the decline of the third lens group G3 is difficult with without anti-fuselage
Image planes cannot be realized in short distance and be amplified, not realize the effect of miniaturization by the advantage of short flange distance group；If it exceeds condition
If the lower limit of formula (2), although capable of expanding image field in short distance by divergence of beam, camera lens miniaturization being realized, due to dioptric
It spends by force, aberration correction can be caused difficult, hardly result in high performance wide-angle effect.
If it exceeds if the upper limit of conditional (3), the interval of the first lens group G1 and the second lens group G2 are excessive, although
The zoom ratio of bigger easy to implement, but the volume of the first lens group G1 will become larger, it is thus difficult to realize compact, it is big wide
The effect at angle；And when more than the lower limit of conditional (3), although ultra-wide angle and miniaturization are easy to implement, because of the first lens
The interval too small of group G1 and the second lens group G2, zoom ratio is just very small, loses the meaning of zoom.
If it exceeds if the upper limit of conditional (4), continuous 4 negative lenses of the first lens group G1 since object side
Diopter will be excessively weak, leads to the effect of the big picture of miniaturization difficult to realize；, whereas if be more than the lower limit of conditional (4)
Words, since diopter is too strong, although miniaturization easy to implement and big wide-angle lead to such as aberration mistake because curvature is too strong
Voluminous life and can not correct well, do not realize high performance effect.
If it exceeds if the upper limit of conditional (5), the focal length of telescope end is long, that is, zoom ratio is excessive, although
Higher zoom ratio is realized, but camera lens volume can be caused excessive, or because the diopter of the first lens group G1 is too strong, is led
Cause aberration excessively generates and can not correct causes performance that can not ensure；If it exceeds if the lower limit of conditional (5), telescope end
Focal length is too short, that is, zoom ratio is too low, and the diopter of the meaning or the first lens group G1 that lose zoom is too weak, nothing
Method realizes the effect of miniaturization and big wide-angle.
Compared with prior art, the present invention has the following technical effects：
In the present invention, by the design of the first lens group G1, the second lens group G2 and the third lens group G3, one kind is realized
Miniaturization, high-performance, the wide-angle side of low cost draw the ultra-wide angle zoom lens that angle is more than 120 °.
Description of the drawings
Fig. 1 is the schematic diagram that the nothing that embodiment 1 provides surpasses in reverse wide-angle zoom lens；
Fig. 2 is the infinity of embodiment 1, spherical aberration when nearest photo distance, curvature of field aberration, distortion aberration and again
Rate aberration；
Fig. 3 is the schematic diagram that the nothing that embodiment 2 provides surpasses in reverse wide-angle zoom lens；
Fig. 4 is the infinity of embodiment 2, spherical aberration when nearest photo distance, curvature of field aberration, distortion aberration and again
Rate aberration；
Fig. 5 is the schematic diagram that the nothing that embodiment 3 provides surpasses in reverse wide-angle zoom lens；
Fig. 6 is the infinity of embodiment 3, spherical aberration when nearest photo distance, curvature of field aberration, distortion aberration and again
Rate aberration.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Specific embodiment is closed, the present invention is furture elucidated.
Embodiment 1
In conjunction with shown in Fig. 1, a kind of nothing surpasses in reverse wide-angle zoom lens：
Include bearing the first lens group G1 of diopter, the second lens group of positive diopter successively from object side to image planes side
G2 and the third lens group G3 composition with positive diopter；Object from infinitely as far as short distance when, the first lens group G1 and
The third lens group G3 is fixed, and the second lens group G2 is moved to image planes side direction, realizes focus.
The infinity of embodiment 1, spherical aberration when nearest photo distance, curvature of field aberration, distortion aberration and multiplying power color
It is poor as shown in Figure 2.
The data of embodiment 1 are as follows：
Wherein, R (mm)：The radius of curvature in each face；
D(mm)：Each eyeglass interval and lens thickness；
Nd：The refractive index of each glass of d lines；
Vd：The Abbe number of glass
Focal length：10.4~17.472；
Fno：4.6~5.8；
Half draws angle ω：65.5~50.8
Embodiment 2
In conjunction with shown in Fig. 3, a kind of nothing surpasses in reverse wide-angle zoom lens：
Include bearing the first lens group G1 of diopter, the second lens group of positive diopter successively from object side to image planes side
G2 and the third lens group G3 with positive diopter；Object from infinitely as far as short distance when, the first lens group G1 and third
Lens group G3 is fixed, and the second lens group G2 is moved to image planes side direction, realizes focus.
The infinity of embodiment 2, spherical aberration when nearest photo distance, curvature of field aberration, distortion aberration and multiplying power color
It is poor as shown in Figure 4.
The data of embodiment 2 are as follows：
Wherein, R (mm)：The radius of curvature in each face；
D(mm)：Each eyeglass interval and lens thickness；
Nd：The refractive index of each glass of d lines；
Vd：The Abbe number of glass；
Focal length：11.4~21.43；
Fno：4.6~5.7；
Half draws angle ω：63.44~44.9；
| K | 4(B) | 6(C) | 8(D) | 10(E) | 12(F) | |
| 5 | 0.00000 | 8.63915E-05 | -3.38968E-07 | 8.36150E-10 | -8.94771E-13 | -1.04733E-15 |
| 6 | 0.00000 | 6.43015E-05 | -3.25791E-07 | -1.37527E-09 | 2.08357E-12 | -5.89193E-15 |
| 25 | 0.00000 | 6.58307E-05 | -3.68022E-07 | 5.21879E-09 | -5.36587E-11 | -8.10257E-13 |
| Focal length | 11.4000 | 14.0000 | 21.4324 | 0.0533 times | 0.0651 times | 0.1016 times |
| D(0) | inf | inf | inf | 190.9691 | 193.2007 | 190.4876 |
| D(10) | 13.6967 | 8.7114 | 1.5003 | 14.5281 | 9.4979 | 2.2736 |
| D(13) | 7.1105 | 5.3362 | 2.9518 | 6.2790 | 4.5497 | 2.1785 |
| D(25) | 17.4134 | 21.9412 | 34.2507 | 17.4246 | 21.9579 | 34.2911 |
Embodiment 3
In conjunction with shown in Fig. 5, a kind of nothing surpasses in reverse wide-angle zoom lens：
Include bearing the first lens group G1 of diopter, the second lens group of positive diopter successively from object side to image planes side
G2 and the third lens group G3 with positive diopter；Object from infinitely as far as short distance when, the first lens group G1 and third
Lens group G3 is fixed, and the second lens group G2 is moved to image planes side direction, realizes focus.
The infinity of embodiment 3, spherical aberration when nearest photo distance, curvature of field aberration, distortion aberration and multiplying power color
It is poor as shown in Figure 6.
The data of embodiment 3 are as follows：
Wherein, R (mm)：The radius of curvature in each face；
D(mm)：Each eyeglass interval and lens thickness；
Nd：The refractive index of each glass of d lines；
Vd：The Abbe number of glass；
Focal length：12.5~23.75；
Fno：4.1~5.7；
Half draws angle ω：61.28~42.0
| K | 4(B) | 6(C) | 8(D) | 10(E) | 12(F) | |
| 5 | 0.0000 | 5.71276E-05 | -1.72578E-07 | 4.84863E-10 | -2.83331E-13 | -1.43923E-15 |
| 6 | 0.0000 | 3.71435E-05 | -2.29962E-07 | -5.93431E-11 | -8.86387E-13 | -1.17708E-14 |
| 26 | 0.0000 | 5.70229E-05 | -3.57566E-07 | 1.69382E-09 | -2.82593E-11 | -8.10257E-13 |
| Focal length | 12.5 | 15.7 | 23.7503 | 0.0592 | 0.074 | 0.1145 |
| D(0) | inf | inf | inf | 187.5956 | 189.6543 | 186.4134 |
| D(10) | 15.3941 | 9.3234 | 1.5000 | 16.4989 | 10.3640 | 2.5578 |
| D(13) | 8.5000 | 7.3831 | 5.9033 | 7.3952 | 6.3425 | 4.8455 |
| D(26) | 23.0332 | 28.1221 | 40.5883 | 23.0332 | 28.1221 | 40.5883 |
Conditional meets situation：
| Serial number | Conditional | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| (1) | 0.45≤|F1/WI|≤0.75 | 0.555 | 0.583 | 0.671 |
| (2) | 0.7≤|B03/WI|≤1.2 | 0.863 | 0.913 | 1.043 |
| (3) | 0.45≤|Tw/WI|≤0.75 | 0.534 | 0.601 | 0.675 |
| (4) | 0.15≤|F14/WI|≤0.35 | 0.229 | 0.276 | 0.289 |
| (5) | 1≤|Ft/F1|≤2 | 1.382 | 1.612 | 1.552 |
The basic principles and main features and the features of the present invention of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement is both fallen in the range of claimed invention.The scope of protection of present invention is by appended claims
And its equivalent thereof.
Claims (3)
1. a kind of nothing surpasses in reverse wide-angle zoom lens, it is characterised in that：To image planes side successively including negative diopter from object side
The third lens group G3 of first lens group G1, the second lens group G2 of positive diopter, positive diopter；
Wherein, in the third lens group G3, by image planes it is nearest be one group of negative diopter negative and positive cemented doublet, the negative dioptric
The focal length of the negative and positive cemented doublet of degree is B03；
First lens group G1, the second lens group G2 and the third lens group G3 is become by changing each group group distance to realize
Coke, when object is mobile to short distance from infinity, the first lens group G1 and the third lens group G3 are kept fixed, and the
Two lens group G2 are moved to image planes side and are realized focus；And it satisfies the following conditional expression：
0.45≤|F1/WI|≤0.75 (1)；
0.7≤|B03/WI|≤1.2 (2)；
0.45≤|Tw/WI|≤0.75 (3)；
Wherein, F1：The focal length of first lens group G1；
WI：When the state of infinity, the paraxial image height of maximum of wide-angle side；
B03：There is in the third lens group G3 near image planes the focal length of the negative and positive cemented doublet of negative diopter；
Tw：Under the state of infinity, the airspace of the first lens group G1 and the second lens group G2 of wide-angle side.
2. nothing according to claim 1 surpasses in reverse wide-angle zoom lens, it is characterised in that：Wide-angle zoom mirror is surpassed in reverse in the nothing
In first lens group G1 of head, since object side, it is made of continuous 4 negative diopter lens and several positive diopter eyeglasses；
Wherein, the synthesis focal length of continuous 4 negative diopter lens is F14 since object side, and the synthesis focal length F14 meets：
0.15≤|F14/WI|≤0.35 (4)
Wherein, F14：Since object side, the synthesis focal length of continuous 4 negative diopter lens in the first lens group G1；
WI：When the state of infinity, the paraxial image height of maximum of wide-angle side.
3. nothing according to claim 1 or 2 surpasses in reverse wide-angle zoom lens, it is characterised in that：The focal length of first lens group G1
For F1 under the state of infinity, the optical system focal length Ft of telescope end meets following formula：
1≤|Ft/F1|≤2 (5)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810600134.5A CN108535851B (en) | 2018-06-12 | 2018-06-12 | Non-reflection ultra-wide angle zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810600134.5A CN108535851B (en) | 2018-06-12 | 2018-06-12 | Non-reflection ultra-wide angle zoom lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108535851A true CN108535851A (en) | 2018-09-14 |
| CN108535851B CN108535851B (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810600134.5A Active CN108535851B (en) | 2018-06-12 | 2018-06-12 | Non-reflection ultra-wide angle zoom lens |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1152246A (en) * | 1997-08-05 | 1999-02-26 | Nikon Corp | Zoom lens |
| KR20020004183A (en) * | 2000-07-03 | 2002-01-16 | 이중구 | Compact zoom lens |
| JP2003177313A (en) * | 2001-12-12 | 2003-06-27 | Nikon Corp | Optical system |
| JP2007003774A (en) * | 2005-06-23 | 2007-01-11 | Nikon Corp | Zoom lens |
| CN1924632A (en) * | 2006-09-12 | 2007-03-07 | 亚洲光学股份有限公司 | Zoom lens |
| DE102005055712A1 (en) * | 2005-11-23 | 2007-05-24 | Carl Zeiss | Optical system e.g. zoom lens system, for digital camera module of e.g. digital camera, for imaging object on e.g. charge-coupled device, has lens group with fixed distance to device, and another two lens groups movably arranged |
| CN101251638A (en) * | 2007-02-20 | 2008-08-27 | 富士能株式会社 | Three-group zoom lens and imaging device |
| KR20090077494A (en) * | 2008-01-11 | 2009-07-15 | 삼성디지털이미징 주식회사 | Wide field-of-view zoom optics |
| JP2015203736A (en) * | 2014-04-11 | 2015-11-16 | 株式会社シグマ | Super wide angle zoom lens |
| CN208399792U (en) * | 2018-06-12 | 2019-01-18 | 安徽老蛙光学科技有限公司 | Nothing surpasses in reverse wide-angle zoom lens |
-
2018
- 2018-06-12 CN CN201810600134.5A patent/CN108535851B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1152246A (en) * | 1997-08-05 | 1999-02-26 | Nikon Corp | Zoom lens |
| KR20020004183A (en) * | 2000-07-03 | 2002-01-16 | 이중구 | Compact zoom lens |
| JP2003177313A (en) * | 2001-12-12 | 2003-06-27 | Nikon Corp | Optical system |
| JP2007003774A (en) * | 2005-06-23 | 2007-01-11 | Nikon Corp | Zoom lens |
| DE102005055712A1 (en) * | 2005-11-23 | 2007-05-24 | Carl Zeiss | Optical system e.g. zoom lens system, for digital camera module of e.g. digital camera, for imaging object on e.g. charge-coupled device, has lens group with fixed distance to device, and another two lens groups movably arranged |
| CN1924632A (en) * | 2006-09-12 | 2007-03-07 | 亚洲光学股份有限公司 | Zoom lens |
| CN101251638A (en) * | 2007-02-20 | 2008-08-27 | 富士能株式会社 | Three-group zoom lens and imaging device |
| KR20090077494A (en) * | 2008-01-11 | 2009-07-15 | 삼성디지털이미징 주식회사 | Wide field-of-view zoom optics |
| JP2015203736A (en) * | 2014-04-11 | 2015-11-16 | 株式会社シグマ | Super wide angle zoom lens |
| CN208399792U (en) * | 2018-06-12 | 2019-01-18 | 安徽老蛙光学科技有限公司 | Nothing surpasses in reverse wide-angle zoom lens |
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| Publication number | Publication date |
|---|---|
| CN108535851B (en) | 2023-11-10 |
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Effective date of registration: 20190508 Address after: 230001 7 building, Luyang Pioneer Park, Luyang Tianshui Road, Luyang, Hefei, Anhui 11 Applicant after: ANHUI CHANGGENG OPTICS TECHNOLOGY Co.,Ltd. Address before: 230000 Building 5, innovation park, University of science and technology, Tianshui road and Taihe Road, Luyang, Hefei, Anhui Applicant before: ANHUI LAOWA OPTICS TECHNOLOGY Co.,Ltd. |
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