CN107315238B - A kind of high-resolution zoom camera lens - Google Patents
A kind of high-resolution zoom camera lens Download PDFInfo
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- CN107315238B CN107315238B CN201710707720.5A CN201710707720A CN107315238B CN 107315238 B CN107315238 B CN 107315238B CN 201710707720 A CN201710707720 A CN 201710707720A CN 107315238 B CN107315238 B CN 107315238B
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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
- G02B15/163—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 first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—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 first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—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 first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
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Abstract
The present invention proposes that a kind of high-resolution zoom camera lens, the camera lens include the first lens group A, the second lens group B, a third lens group C and a 4th lens group D with positive light coke with negative power with negative power with positive light coke being arranged successively along optical axis direction from object end to the image end；The focal length of first lens groupMaximum clear aperture is, the focal length of the second lens groupMaximum clear aperture is, the focal length of the third lens groupMaximum clear aperture is, the focal length of the 4th lens groupMaximum clear aperture is, the focal length of each lens group, maximum clear aperture meet the following conditions；,,,；The present invention can provide resolution ratio close to the zoom lens of diffraction limit.
Description
Technical field
The present invention relates to field of optical lens, especially a kind of high-resolution zoom camera lens.
Background technique
With the development of engineering technology, zoom lens is always toward higher rate respectively, bigger light passing amount and bigger zoom ratio
Development.Major part zoom lens now has done many effort in terms of improving light passing amount and zoom ratio, but has mentioned high-resolution
It reports rarely found.In view of this, the present invention provides a kind of resolution ratio close to the zoom lens of diffraction limit.
Summary of the invention
The present invention proposes a kind of high-resolution zoom camera lens, can provide resolution ratio close to diffraction limit zoom lens.
The present invention uses following technical scheme.
A kind of high-resolution zoom camera lens, the camera lens include one be arranged successively along optical axis direction from object end to the image end
The first lens group A with positive light coke, a second lens group B with negative power, one with negative power the
Three lens group C and a 4th lens group D with positive light coke.
The focal length f of first lens groupAMaximum clear aperture is DA, the focal length f of the second lens groupBMaximum clear aperture
For DB, the focal length f of the third lens groupCMaximum clear aperture is DC, the focal length f of the 4th lens groupDMaximum clear aperture is DD, each
The focal length of microscope group, maximum clear aperture meet the following conditions；
1.4≤|fA/DA|≤2
1.4≤|fB/DB|≤2
1.4≤|fC/DC|≤2
1.4≤|fD/DD|≤2。
It is L that each lens group of camera lens, which is formed by total length of light path,t, the second lens group B, the third lens group C are
It is moved between one lens group and the 4th lens group, the second lens group moving range LB, the moving range L of the third lens groupC,
System overall length Lt, meet the following conditions:
0.3≤LB/Lt≤0.4
0.1≤LC/Lt≤0.2。
First positive lens groups A is made of crescent moon positive lens A-1, bent moon negative lens A-2 and crescent moon positive lens A-3, wherein A-2
It is glued together with A-3；Second negative lens group B is by bent moon negative lens B-1, bent moon negative lens B-2 and bent moon positive lens B-3 group
At wherein B-2 and B-3 are glued together；Third negative lens group C is made of double-concave negative lens C-1 and bent moon positive lens C-2, C-1
It is glued together with C-2；4th positive lens groups D is by biconvex positive lens D-1, plano-convex positive lens D-2, biconvex positive lens D-3, concave-concave
Negative lens D-4, biconvex positive lens D-5, double-concave negative lens D-6 and crescent moon positive lens D-7 composition, wherein D-3 and D-4 are glued at one
It rises, D-5 and D-6 are glued together.
Crescent moon positive lens A-3 and biconvex positive lens D-3 is using unusual glass.
The abnormality glass is the optical glass with especial dispersion, i.e. the glass of dispersion and Abbe constant deviation linear relationship
Glass.
The glass bent moon positive lens B-3 big using thermotropic refractive index.
The 4th positive lens groups are fixed by fixed group mechanism after this camera lens, are equipped with light at the front end of fixed group mechanism after described
Door screen.
The first positive lens groups A, the second negative lens group B, third negative lens group C and the 4th positive lens groups D it is adjacent between
Minimum edge interval be greater than 1mm.
The focal range of the camera lens is 17mm -200mm；Lens parameters F is less than 6；The image planes diameter of camera lens is greater than φ 6；
4. distortion is less than 0.5%；Camera lens overall length is less than 123mm.
In the present invention, the focal length of each lens group, maximum clear aperture are matched with stringent ratio, are spread out to be able to achieve
The resolution ratio of emitter-base bandgap grading limit；Resolution ratio in the entire zooming range of camera lens is all close to diffraction limit.
In the present invention, crescent moon positive lens A-3 and biconvex positive lens D-3 are using unusual glass；It is described abnormality glass be with
The glass of the optical glass of especial dispersion, i.e. dispersion and Abbe constant deviation linear relationship；So as to correct second level when focal length
Spectrum.
In the present invention, 7 eyeglasses are set in the 4th lens group D, can effectively correct spherical aberration when short focus.
In the present invention, the glass bent moon positive lens B-3 big using thermotropic refractive index is able to achieve setting without thermalization for camera lens
Meter.
Detailed description of the invention
The present invention is described in more detail with reference to the accompanying drawings and detailed description:
Fig. 1 is light path schematic diagram of the invention；
Fig. 2 is MTF of the embodiment of the present invention in short focus；
Fig. 3 is MTF of the embodiment of the present invention in focal length；
Fig. 4 is the assembly total figure of the embodiment of the present invention；
Fig. 5 is the preceding fixed group schematic diagram of the embodiment of the present invention；
Fig. 6 a is the zoom component diagram of the embodiment of the present invention；
Fig. 6 b is another schematic diagram of zoom component of the embodiment of the present invention；
Fig. 6 c is the stereoscopic schematic diagram of the zoom component of the embodiment of the present invention；
Fig. 7 a is the rear fixed group schematic diagram of the embodiment of the present invention；
Fig. 7 b is rear fixed another schematic diagram of group of the embodiment of the present invention；
Fig. 7 c is the stereoscopic schematic diagram of the rear fixed group of the embodiment of the present invention；
In figure: fixing group before 31-；32- zoom component；33- compensation component；34- light bar component: 35- cam pack；36-
CCD camera；
Clamp ring is organized before 41-；Pressing ring is organized before 42-；43-A piece；44-AB spacer ring；45- preceding group lens barrel；46-B piece；47-C piece；
51- zoom motor rack；52- zoom motor gear；53- motor；54- cam cover；55- body tube；56- steel ball；
57- zoom cam；58- guide rod；59- zoom cam pressing ring；510- compensation component；511- potentiometer；512- zoom potentiometer tooth
Wheel；513- zoom component；514- connection pedestal
61-J piece；62-I piece；63- rear group lens barrel 1；64-IJ spacer ring；65-JK spacer ring；66-K piece；67-L piece pressing ring；68-
After organize gasket；69- rear group lens barrel 2；610-M piece；611-N piece；612-NO spacer ring；613-O piece；614-O piece pressing ring；615- zoom
Limiting bracket 1；616- zoom limiting bracket 2；617-L piece.
Specific embodiment
A kind of high-resolution zoom camera lens, the camera lens include one be arranged successively along optical axis direction from object end to the image end
The first lens group A with positive light coke, a second lens group B with negative power, one with negative power the
Three lens group C and a 4th lens group D with positive light coke.
The focal length f of first lens groupAMaximum clear aperture is DA, the focal length f of the second lens groupBMaximum clear aperture
For DB, the focal length f of the third lens groupCMaximum clear aperture is DC, the focal length f of the 4th lens groupDMaximum clear aperture is DD, each
The focal length of microscope group, maximum clear aperture meet the following conditions；
1.4≤|fA/DA|≤2
1.4≤|fB/DB|≤2
1.4≤|fC/DC|≤2
1.4≤|fD/DD|≤2。
It is L that each lens group of camera lens, which is formed by total length of light path,t, the second lens group B, the third lens group C are
It is moved between one lens group and the 4th lens group, the second lens group moving range LB, the moving range L of the third lens groupC,
System overall length Lt, meet the following conditions:
0.3≤LB/Lt≤0.4
0.1≤LC/Lt≤0.2。
First positive lens groups A is made of crescent moon positive lens A-1, bent moon negative lens A-2 and crescent moon positive lens A-3, wherein A-2
It is glued together with A-3；Second negative lens group B is by bent moon negative lens B-1, bent moon negative lens B-2 and bent moon positive lens B-3 group
At wherein B-2 and B-3 are glued together；Third negative lens group C is made of double-concave negative lens C-1 and bent moon positive lens C-2, C-1
It is glued together with C-2；4th positive lens groups D is by biconvex positive lens D-1, plano-convex positive lens D-2, biconvex positive lens D-3, concave-concave
Negative lens D-4, biconvex positive lens D-5, double-concave negative lens D-6 and crescent moon positive lens D-7 composition, wherein D-3 and D-4 are glued at one
It rises, D-5 and D-6 are glued together.
Crescent moon positive lens A-3 and biconvex positive lens D-3 is using unusual glass.
The abnormality glass is the optical glass with especial dispersion, i.e. the glass of dispersion and Abbe constant deviation linear relationship
Glass.
The glass bent moon positive lens B-3 big using thermotropic refractive index.
The 4th positive lens groups are fixed by fixed group mechanism after this camera lens, are equipped with light at the front end of fixed group mechanism after described
Door screen.
The first positive lens groups A, the second negative lens group B, third negative lens group C and the 4th positive lens groups D it is adjacent between
Minimum edge interval be greater than 1mm.
The focal range of the camera lens is 17mm -200mm；Lens parameters F is less than 6；The image planes diameter of camera lens is greater than φ 6；
4. distortion is less than 0.5%；Camera lens overall length is less than 123mm.
In the present embodiment, the camera lens mechanical structure includes the body tube 55 positioned at middle part, 55 installed in front of body tube
There is a preceding group lens barrel 45 to group fixed before installing, body tube 55 is equipped with the rear group of mirror 63 to group fixed after installing, and rear group
There is installation rear group lens barrel 69 on rear side of lens barrel 63；55 interior forward end of body tube have to install zoom component 513 and can front and back shifting
Dynamic zoom lens barrel, body tube Internal back end have the compensation lens barrel to install compensation group 510 and can be moved forward and backward.
In the present embodiment, A piece 43, B piece 46, C piece 47 are installed by spacer ring pressing ring in the preceding group lens barrel 45.A piece and B
AB spacer ring 44 is installed, B piece C piece is glue pellet between piece.Front and back is fixed with pressing ring.
In the present embodiment, outer on the body tube 55 to be cased with zoom cam 57, it is additionally provided with inside body tube 55 and master
It slides axially the zoom Mobile base of cooperation in the middle part of lens barrel and compensation Mobile base, zoom cam 57 is led by zoom guide pin and compensation
Nail drives zoom Mobile base and compensation Mobile base along moving axially back and forth respectively, and the zoom lens barrel and compensation lens barrel are installed respectively
In on zoom Mobile base and compensation Mobile base；Positioned at rear group lens barrel side be provided with zoom limiting bracket 615/616 and with change
The zoom motor 53 and zoom potentiometer 511 that times cam 57 is driven by tooth engagement, have on the zoom cam and Hall member
The magnet steel that part matches.
In the present embodiment, zoom cam 57 is placed in body tube 55 by steel ball 56 and forms rolling bearing, by zoom cam
Pressing ring 59 is locked；The zoom cam 57 processes zoom, compensated curve slot by the requirement of the optical zoom equation of motion, respectively with change
Times guide pin and compensation guide pin zoom cam 57 and zoom Mobile base, compensate Mobile base and link together；The zoom motor 53,
Zoom potentiometer 511 is placed on body tube 55 by zoom electric machine support 51, and the zoom limiting bracket 515/516 is placed in
It organizes on body tube afterwards；Zoom motor gear 52 is engaged with zoom cam 57, is when 53 rotor of zoom motor does positive and negative rotary motion,
It drives zoom cam 57 to correspondingly rotate, zoom group is driven by zoom, compensated curve slot and zoom guide pin, compensation guide pin
513, compensation group 510 moves in the way of zoom, compensated curve slot, and two on body tube 55 straight trough plays limitation zoom guide pin
Part, the effect for compensating guide pin, and the rotary motion of zoom group 513, compensation group 510 is made to become moving along a straight line；Strict control zoom
The fit clearance between straight-line groove on the curved groove and body tube 55 of guide pin component and compensation guide pin component and zoom cam 57,
Guarantee that zoom component and compensation component slide steadily, without cassette tape.It is rotated in this way by motor and realizes zoom lens barrel and compensation lens barrel
Linear motion back and forth is done by zoom motion equation requirement, to realize the consecutive variations function of system focal length.
When the focal length of system changes, zoom potentiometer gear 51 is engaged with zoom cam 57, synchronize and zoom
Opposite rotation occurs for cam 57, and the resistance value of potentiometer changes, and can find out potentiometer by sample circuit appropriate
Changing value, and it is transmitted to control centre, to realize the display of zoom value；Conversely, respective resistance values order is provided by control centre,
The real-time control of focal length can be achieved.Hall element plays the limit to system in zooming procedure and guarantor by magnet steel cooperating
Shield effect.
In the present embodiment, the rear group lens barrel 1 (63) installs I piece, J piece, K piece, L piece by pressing ring spacer ring.After organize mirror
It is connected through a screw thread rear group lens barrel 2 (69) on rear side of 1 (63) of cylinder, passes through spacer ring pressing ring installation M piece, N piece, O in rear group lens barrel 2 (69)
Piece.
A piece described in this example, B piece, C piece, K piece, L piece, M piece, N piece respectively refer to each eyeglass in optical path and its corresponding
Fixed structure.
In the present embodiment, the optical parameter of each eyeglass is as shown in the table,
There are three zoom position, spacing parameter such as following tables for the present embodiment；
| Surface | Short focus | Middle coke | Focal length |
| D5 | 1.3 | 37.7 | 43.2 |
| D10 | 35.0 | 3.6 | 6.8 |
| D13 | 16.2 | 11.1 | 2.5 |
Claims (4)
1. a kind of high-resolution zoom camera lens, it is characterised in that: the camera lens include along optical axis direction from object end to the image end successively
One the first lens group A with positive light coke of arrangement, a second lens group B with negative power, one with bearing
The third lens group C of focal power and a 4th lens group D with positive light coke；The focal length f of first lens groupAIt is maximum
Clear aperture is DA, the focal length f of the second lens groupBMaximum clear aperture is DB, the focal length f of the third lens groupCMaximum clear aperture
For DC, the focal length f of the 4th lens groupDMaximum clear aperture is DD, the focal length of each lens group, maximum clear aperture meet following item
Part；
1.4≤|fA/DA|≤2
1.4≤|fB/DB|≤2
1.4≤|fC/DC|≤2
1.4≤|fD/DD|≤2；
It is L that each lens group of camera lens, which is formed by total length of light path,t, the second lens group B, the third lens group C are in the first lens
It is moved between group and the 4th lens group, the second lens group moving range LB, the moving range L of the third lens groupC, system is total
Long Lt, meet the following conditions:
0.3≤LB/Lt≤0.4
0.1≤LC/Lt≤0.2；
The focal length of each lens group, the ratio of maximum clear aperture strictly match, and realize the resolution ratio of diffraction limit, and keep camera lens whole
Resolution ratio in a zooming range is all close to diffraction limit；
First positive lens groups A is made of crescent moon positive lens A-1, bent moon negative lens A-2 and crescent moon positive lens A-3, wherein A-2 and A-
3 is glued together；Second negative lens group B is made of bent moon negative lens B-1, bent moon negative lens B-2 and bent moon positive lens B-3,
Middle B-2 and B-3 are glued together；Third negative lens group C is made of double-concave negative lens C-1 and bent moon positive lens C-2, C-1 and C-2
It is glued together；4th positive lens groups D is negative saturating by biconvex positive lens D-1, plano-convex positive lens D-2, biconvex positive lens D-3, concave-concave
Mirror D-4, biconvex positive lens D-5, double-concave negative lens D-6 and crescent moon positive lens D-7 composition, wherein D-3 and D-4 are glued together,
D-5 and D-6 are glued together；
The focal range of the camera lens is 17mm -200mm；Lens parameters F is less than 6；The image planes diameter of camera lens is greater than φ 6；Distortion
Less than 0.5%；Camera lens overall length is less than 123mm.
2. a kind of high-resolution zoom camera lens according to claim 1, it is characterised in that: crescent moon positive lens A-3 and biconvex
Positive lens D-3 is using unusual glass；
The abnormality glass is the optical glass with especial dispersion, i.e. the glass of dispersion and Abbe constant deviation linear relationship.
3. a kind of high-resolution zoom camera lens according to claim 2, it is characterised in that: fixed group mechanism after this camera lens
The 4th positive lens groups are fixed, are equipped with diaphragm at the front end of fixed group mechanism after described.
4. a kind of high-resolution zoom camera lens according to claim 3, it is characterised in that: the first positive lens groups A,
Two negative lens group B, third negative lens group C and the 4th positive lens groups D it is adjacent between minimum edge interval be greater than 1mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710707720.5A CN107315238B (en) | 2017-08-17 | 2017-08-17 | A kind of high-resolution zoom camera lens |
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| CN201710707720.5A CN107315238B (en) | 2017-08-17 | 2017-08-17 | A kind of high-resolution zoom camera lens |
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| CN107315238A CN107315238A (en) | 2017-11-03 |
| CN107315238B true CN107315238B (en) | 2019-10-25 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116530B (en) * | 2018-08-17 | 2020-09-11 | 福建福光股份有限公司 | Short-wave infrared optical athermalization continuous zoom lens |
| CN109358419B (en) * | 2018-12-04 | 2023-07-28 | 福建福光股份有限公司 | Wide-spectrum high-definition low-light zoom lens and working method thereof |
| CN115421285B (en) * | 2022-09-05 | 2024-07-12 | 成都优视光电技术有限公司 | Ultra-high definition video zoom lens |
| CN116149034B (en) * | 2022-12-31 | 2024-05-03 | 福建福光股份有限公司 | Continuous zooming camera lens |
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| CN1797060A (en) * | 2004-12-28 | 2006-07-05 | 柯尼卡美能达精密光学株式会社 | Zoom lens and image pickup apparatus |
| CN101131466A (en) * | 2006-08-25 | 2008-02-27 | 奥林巴斯映像株式会社 | Zoom lens system and electronic image pickup apparatus using the same |
| CN101215085A (en) * | 2007-01-06 | 2008-07-09 | 湖北新华光信息材料股份有限公司 | Optical glass with especial dispersion |
| CN103424852A (en) * | 2013-08-22 | 2013-12-04 | 福建福光数码科技有限公司 | High-magnification and high-definition electric camera lens with magnification varying and zooming functions |
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| CN107315238A (en) | 2017-11-03 |
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