CN114153104B - High-magnification anti-shake camera device and zoom lens - Google Patents
High-magnification anti-shake camera device and zoom lens Download PDFInfo
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- CN114153104B CN114153104B CN202210119660.6A CN202210119660A CN114153104B CN 114153104 B CN114153104 B CN 114153104B CN 202210119660 A CN202210119660 A CN 202210119660A CN 114153104 B CN114153104 B CN 114153104B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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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 +-+
Abstract
The invention relates to the technical field of camera shooting, in particular to a high-magnification anti-shake camera shooting device and a zoom lens. The method comprises the following steps: a zoom lens; and an image pickup element configured to receive an image formed by the zoom lens; the zoom lens consists of five lens groups; the zoom lens sequentially comprises from an object plane side to an image plane side: the zoom lens comprises a fixed lens group with positive focal power, a first zoom lens group with negative focal power, a second zoom lens group with positive focal power, an anti-shake lens group with negative focal power and a focusing lens group with positive focal power; the first zoom lens group, the second zoom lens group and the focusing lens group move along the direction of a main optical axis of the zoom lens; the light in the camera device is better converged, the light aberration and the coma after the light is converged by the fixed lens group are corrected by the arrangement of the sixth lens, and the imaging quality of the camera device is improved.
Description
Technical Field
The invention relates to the technical field of camera shooting, in particular to a high-magnification anti-shake camera shooting device and a zoom lens.
Background
The camera devices are various in types, and the basic principle of the operation is the same: the optical image signal is converted into an electrical signal for storage or transmission. When an object is shot, light reflected by the object is collected by a lens of the camera device, so that the light is focused on a light receiving surface of the camera device, and then the light is converted into electric energy through the camera device, so that a video signal is obtained.
With the continuous development and progress of the technology level, the requirement of the user on the imaging quality of the camera device is higher and higher, and the application of the anti-shake technology to the camera device is an inevitable trend. Anti-shake techniques can be divided into three major categories: optical anti-shake, electronic anti-shake, and photoreceptor (CCD) anti-shake.
At present, for an anti-shake camera device with a large magnification, a plurality of moving groups are arranged inside the anti-shake camera device, the moving range of the moving groups is large, the size of the camera device is large, the front group still requires high correction capability on front group aberration and coma in the process of converging light, and the camera device in the market is difficult to meet the requirements.
Disclosure of Invention
The invention solves the technical problems in the prior art, and provides a high-magnification anti-shake camera device and a zoom lens, which realize better convergence of light in the camera device, realize the correction of light aberration and coma after convergence of a fixed lens group through the arrangement of a sixth lens, and increase the imaging quality of the camera device.
The technical scheme provided by the invention is as follows:
a high-magnification anti-shake camera device,
the method comprises the following steps:
a zoom lens;
and an image pickup element configured to receive an image formed by the zoom lens;
the zoom lens consists of five lens groups;
the zoom lens sequentially comprises from an object plane side to an image plane side:
the zoom lens comprises a fixed lens group with positive focal power, a first zoom lens group with negative focal power, a second zoom lens group with positive focal power, an anti-shake lens group with negative focal power and a focusing lens group with positive focal power;
the first zoom lens group, the second zoom lens group and the focusing lens group move along the direction of a main optical axis of the zoom lens;
the fixed lens group comprises the following components in sequence from the object plane side to the image plane side:
a first fixed lens with positive focal power, a second fixed lens with negative focal power, a third fixed lens with positive focal power, a fourth fixed lens with positive focal power, a fifth fixed lens with negative focal power and a sixth fixed lens with positive focal power; the first fixed lens is glued with the second fixed lens, and the fifth fixed lens is glued with the sixth fixed lens;
the first variable power lens group includes, in order from the object plane side to the image plane side:
the zoom lens comprises a first zoom lens with negative focal power, a second zoom lens with negative focal power, a third zoom lens with positive focal power, a fourth zoom lens with negative focal power and a fifth zoom lens with positive focal power; the third zoom lens, the fourth zoom lens and the fifth zoom lens form a triple cemented lens;
the second variable power lens group includes in order from the object plane side to the image plane side:
a sixth variable power lens with positive focal power, a seventh variable power lens with positive focal power, an eighth variable power lens with negative focal power, and a ninth variable power lens with positive focal power; the eighth variable power lens is glued with the ninth variable power lens;
the anti-shake lens group includes in order from the object plane side to the image plane side:
a first anti-shake lens with negative focal power and a second anti-shake lens with positive focal power;
the focusing lens group comprises the following components in sequence from the object plane side to the image plane side:
a first focusing lens with positive focal power, a second focusing lens with negative focal power, a third focusing lens with positive focal power, wherein the second focusing lens and the third focusing lens are glued;
the zoom lens satisfies the following conditional expression:
ft/fw＞55；
0.35＜Db6/fw＜0.45；
ft is a focal length of the zoom lens in a telephoto state, fw is a focal length of the zoom lens in a wide-angle state, and Db6 is a thickness of the sixth variable power lens.
Preferably, the image plane side curvature of the fifth variable power lens is curved toward the object plane side.
Preferably, the zoom lens satisfies the following conditional expression:
ΣDG1/LG1＞0.9；
where Σ DG1 is the sum of the thicknesses of all lenses in the fixed lens group, and LG1 is the total optical length of the fixed lens group.
Preferably, the zoom lens satisfies the following conditional expression:
0.4＜SG3/SG2＜0.45；
wherein SG2 is a moving distance of the first variable magnification lens group, and SG3 is a moving distance of the second variable magnification lens group.
Preferably, the zoom lens satisfies the following conditional expression:
0.3＜SG5/SG2＜0.35；
wherein SG5 represents a moving distance of the focusing lens group.
Preferably, the zoom lens satisfies the following conditional expression:
fa12/ft＞3；
|Ra22/Ra11|＞2；
fa12 is the focal length after the first fixed lens and the second fixed lens are cemented, Ra11 is the radius of curvature of the object-side curved surface of the first fixed lens, and Ra22 is the radius of curvature of the image-side curved surface of the second fixed lens.
Preferably, the zoom lens satisfies the following conditional expression:
Db67/LG3＞0.35；
wherein Db67 is a distance between the sixth variable power lens and the seventh variable power lens, and LG3 is an optical total length of the second variable power lens group.
Preferably, the zoom lens satisfies the following conditional expression:
0.5＜|Rc11/Rc12|＜2；
where Rc11 is the radius of curvature of the object-side curved surface of the first anti-shake lens, and Rc12 is the radius of curvature of the image-side curved surface of the first anti-shake lens.
Preferably, the zoom lens satisfies the following conditional expression:
0.15＜ΦG4/ΦG1＜0.2；
wherein Φ G4 is an outer diameter of the anti-shake lens group, and Φ G1 is an outer diameter of the fixed lens group.
It is still another object of the present invention to provide a zoom lens composed of five lens groups, the zoom lens comprising, in order from an object plane side to an image plane side:
the zoom lens comprises a fixed lens group with positive focal power, a first zoom lens group with negative focal power, a second zoom lens group with positive focal power, an anti-shake lens group with negative focal power and a focusing lens group with positive focal power;
the first zoom lens group, the second zoom lens group and the focusing lens group move along the direction of a main optical axis of the zoom lens;
the fixed lens group comprises the following components in sequence from the object plane side to the image plane side:
a first fixed lens with positive focal power, a second fixed lens with negative focal power, a third fixed lens with positive focal power, a fourth fixed lens with positive focal power, a fifth fixed lens with negative focal power and a sixth fixed lens with positive focal power; the first fixed lens is glued with the second fixed lens, and the fifth fixed lens is glued with the sixth fixed lens;
the first variable power lens group includes, in order from the object plane side to the image plane side:
the zoom lens comprises a first zoom lens with negative focal power, a second zoom lens with negative focal power, a third zoom lens with positive focal power, a fourth zoom lens with negative focal power and a fifth zoom lens with positive focal power; the third zoom lens, the fourth zoom lens and the fifth zoom lens form a triple cemented lens;
the second variable power lens group includes in order from the object plane side to the image plane side:
a sixth variable power lens with positive focal power, a seventh variable power lens with positive focal power, an eighth variable power lens with negative focal power, and a ninth variable power lens with positive focal power; the eighth variable power lens is glued with the ninth variable power lens;
the anti-shake lens group includes in order from the object plane side to the image plane side:
a first anti-shake lens with negative focal power and a second anti-shake lens with positive focal power;
the focusing lens group comprises the following components in sequence from the object plane side to the image plane side:
a first focusing lens with positive focal power, a second focusing lens with negative focal power, a third focusing lens with positive focal power, wherein the second focusing lens and the third focusing lens are glued;
the zoom lens satisfies the following conditional expression:
ft/fw＞55；
0.35＜Db6/fw＜0.45；
ft is a focal length of the zoom lens in a telephoto state, fw is a focal length of the zoom lens in a wide-angle state, and Db6 is a thickness of the sixth variable power lens.
Compared with the prior art, the large-magnification anti-shake camera device and the zoom lens provided by the invention have the following beneficial effects:
1. the effect of large multiplying power of the camera device is achieved, and meanwhile, the optical anti-shake effect of the camera device is achieved through the anti-shake lens group; through the setting of more lens in the fixed lens group, better the assembling of light in the camera device has been realized, through the setting of sixth lens, realized the correction to light aberration and coma after the fixed lens group assembles, increased camera device's image quality.
2. The direction of light rays entering the sixth variable power lens is further adjusted through limitation of the curvature radius of the fifth variable power lens, so that the correction capability of the sixth variable power lens on the aberration and the coma aberration of the light rays is increased, and the imaging quality of the camera device is further improved.
3. The thickness of all the lenses in the fixed lens group is limited, so that the clearance in the fixed lens group is reduced, the space utilization rate in the fixed lens group is increased, the transmittance of the camera device under a certain optical total length is increased, and the miniaturization of the camera device is realized.
4. The moving distance of the first variable power lens group and the second variable power lens group is limited, so that the zoom lens can be miniaturized, a large zooming range of the zoom lens can be realized, and the application range of the image pickup device is enlarged.
Drawings
The above features, technical features, advantages and implementation manners of a zoom lens and an imaging device will be further described in the following detailed description of preferred embodiments in a clearly understandable manner with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a high-magnification anti-shake camera device according to the present invention;
FIG. 2 is an aberration diagram of a telescopic state of the high-magnification anti-shake camera device according to the present invention;
FIG. 3 is an aberration diagram of an intermediate state of the high magnification anti-shake camera device according to the present invention;
FIG. 4 is an aberration diagram of a wide-angle state of the high-magnification anti-shake camera device according to the present invention;
FIG. 5 is a schematic structural diagram of another high-magnification anti-shake camera device according to the present invention;
FIG. 6 is an aberration diagram of the telescopic state of another high magnification anti-shake camera device according to the present invention;
FIG. 7 is an aberration diagram of an intermediate state of another high magnification anti-shake camera device according to the present invention;
fig. 8 is an aberration diagram of another high-magnification anti-shake imaging apparatus according to the present invention in a wide-angle state.
The reference numbers illustrate: g1, fixing the lens group; g2, a first zoom lens group; g3, a second variable power lens group; g4, an anti-shake lens group; g5, a focusing lens group; g6, auxiliary components; a1, a first fixed lens; a2, a second stationary lens; a3, third stationary lens; a4, fourth stationary lens; a5, fifth stationary lens; a6, sixth stationary lens; b1, a first variable power lens; b2, a second variable power lens; b3, a third variable power lens; b4, a fourth variable power lens; b5, a fifth variable power lens; b6, a sixth variable power lens; b7, a seventh variable power lens; b8, an eighth variable power lens; b9, ninth variable power lens; c1, a first anti-shake lens; c2, a second anti-shake lens; d1, a first focusing lens; d2, second focusing lens; d3, third focusing lens; STO, stop; CG. And (4) protecting the glass.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
Example 1
As shown in fig. 1, fig. 1 is a schematic structural diagram of a high-magnification anti-shake imaging apparatus.
A high magnification anti-shake image pickup apparatus comprising: a zoom lens and an image pickup element configured to receive an image formed by the zoom lens; the image pickup element is a CCD or CMOS, and the image pickup element can be disposed on the image side IMG of the zoom optical lens.
The zoom lens is composed of five lens groups.
The zoom lens sequentially comprises from an object plane side to an image plane side:
the zoom lens comprises a fixed lens group G1 with positive focal power, a first variable power lens group G2 with negative focal power, a second variable power lens group G3 with positive focal power, an anti-shake lens group G4 with negative focal power and a focusing lens group G5 with positive focal power.
The first variable power lens group G2, the second variable power lens group G3, and the focusing lens group G5 move along the main optical axis direction of the zoom lens.
The fixed lens group G1 includes, in order from the object plane side to the image plane side:
a first fixed lens a1 of positive power, a second fixed lens a2 of negative power, a third fixed lens a3 of positive power, a fourth fixed lens a4 of positive power, a fifth fixed lens a5 of negative power, a sixth fixed lens a6 of positive power; the first fixed lens a1 is cemented with the second fixed lens a2, and the fifth fixed lens a5 is cemented with the sixth fixed lens a 6.
The first variable power lens group G2 includes, in order from the object plane side to the image plane side:
a first variable power lens b1 with negative power, a second variable power lens b2 with negative power, a third variable power lens b3 with positive power, a fourth variable power lens b4 with negative power and a fifth variable power lens b5 with positive power. The third variable power lens b3, the fourth variable power lens b4, and the fifth variable power lens b5 constitute a triple cemented lens.
The second variable power lens group G3 includes, in order from the object plane side to the image plane side:
a sixth variable power lens b6 of positive power, a seventh variable power lens b7 of positive power, an eighth variable power lens b8 of negative power, a ninth variable power lens b9 of positive power; the eighth variable power lens b8 is cemented with the ninth variable power lens b 9.
The anti-shake lens group G4 includes, in order from the object plane side to the image plane side:
a first anti-shake lens c1 of negative power, and a second anti-shake lens c2 of positive power.
The focusing lens group G5 includes, in order from the object plane side to the image plane side:
a first focusing lens d1 of positive power, a second focusing lens d2 of negative power, a third focusing lens d3 of positive power, the second focusing lens d2 being cemented with the third focusing lens d 3.
The zoom lens satisfies the following conditional expression:
ft/fw＞55；
0.35＜Db6/fw＜0.45；
ft is a focal length of the zoom lens in a telephoto state, fw is a focal length of the zoom lens in a wide-angle state, and Db6 is a thickness of the sixth variable power lens b 6.
In this embodiment, the configuration and parameters are limited to realize a high magnification effect of the imaging device, and the anti-shake lens group G4 is provided to realize an optical anti-shake effect of the imaging device; through the setting of more lens in the fixed lens crowd G1, better the gathering of light in the camera device has been realized, through the setting of sixth zoom lens b6, realized the correction to light aberration and coma after the fixed lens crowd G1 gathers, increased camera device's image quality.
The image plane side curvature of the fifth variable power lens b5 is curved toward the object plane side.
In this embodiment, the direction of the light entering the sixth variable power lens b6 is further adjusted by limiting the bending direction of the fifth variable power lens b5, so that the correction capability of the sixth variable power lens b6 on the aberration and coma of the light is increased, and the imaging quality of the imaging device is further increased.
The zoom lens satisfies the following conditional expression:
ΣDG1/LG1＞0.9；
where Σ DG1 is the sum of the thicknesses of all lenses in the fixed lens group G1, and LG1 is the total optical length of the fixed lens group G1.
In the present embodiment, the thickness of all the lenses in the fixed lens group G1 is limited, so that the gap in the fixed lens group G1 is reduced, the space utilization rate in the fixed lens group G1 is increased, the transmittance of the imaging device is increased at a certain total optical length, and the imaging device is miniaturized.
The zoom lens satisfies the following conditional expression:
0.4＜SG3/SG2＜0.45；
wherein SG2 is a moving distance of the first variable magnification lens group G2, and SG3 is a moving distance of the second variable magnification lens group G3.
The limitation of the moving distance of the first variable power lens group G2 and the second variable power lens group G3 enables the zoom lens to be miniaturized, enables a wide zoom range to be achieved, and increases the application range of the imaging device.
The zoom lens satisfies the following conditional expression:
0.3＜SG5/SG2＜0.35；
wherein SG5 is a moving distance of the focusing lens group G5.
The adjustment of the focusing lens group G5 to the imaging quality of the zoom lens is increased through the limitation of the moving distance of the focusing lens group G5, and the imaging reliability of the imaging device is increased.
The zoom lens satisfies the following conditional expression:
fa12/ft＞3；
|Ra22/ Ra11|＞2；
fa12 represents the focal length of the cemented first fixed lens a1 and second fixed lens a2, Ra11 represents the radius of curvature of the object-side curved surface of the first fixed lens a1, and Ra22 represents the radius of curvature of the image-side curved surface of the second fixed lens a 2.
The possibility of large chromatic aberration after the optical path passes through is reduced by the definition of the focal length after the first fixed lens a1 and the second fixed lens a2 are cemented, and the angle of the optical path after the optical path passes through the first fixed lens a1 and the second fixed lens a2 is further reduced by the definition of the curvature radius, so that the correction of the optical path by a subsequent group is facilitated.
The zoom lens satisfies the following conditional expression:
Db67/LG3＞0.35；
wherein Db67 is a distance between the sixth variable power lens b6 and the seventh variable power lens b7, and LG3 is an optical total length of the second variable power lens group G3.
In this embodiment, the seventh variable power lens b7 is facilitated to receive light by limiting the distance between the sixth variable power lens b6 and the seventh variable power lens b7, and the received light aberration and coma are reduced, so that the imaging reliability of the imaging device is improved.
The zoom lens satisfies the following conditional expression:
0.5＜|Rc11/Rc12|＜2；
where Rc11 is the radius of curvature of the first anti-shake lens c1 on the object plane side curved surface, and Rc12 is the radius of curvature of the first anti-shake lens c1 on the image plane side curved surface.
The optical path of the zoom lens can be greatly corrected without causing large coma aberration and aberration by limiting the curvature radius of both sides of the first anti-shake lens c 1.
The zoom lens satisfies the following conditional expression:
0.15＜ΦG4/ΦG1＜0.2；
wherein Φ G4 is an outer diameter of the anti-shake lens group G4, and Φ G1 is an outer diameter of the fixed lens group G1.
The maximum outer diameter of the anti-shake lens group G4 with proper size is limited, so that the anti-shake lens group G4 can move in the zoom lens along the direction perpendicular to the main optical axis conveniently, the anti-shake lens group G4 can correct optical path aberration and coma aberration conveniently, and the imaging quality of the camera device is improved.
Example 2
As shown in fig. 1 to 4, fig. 1 is a schematic structural diagram of a high-magnification anti-shake imaging apparatus, fig. 2 is aberration diagrams of a telescopic state of the high-magnification anti-shake imaging apparatus described in this embodiment, fig. 3 is aberration diagrams of an intermediate state of the high-magnification anti-shake imaging apparatus described in this embodiment, and fig. 4 is aberration diagrams of a wide-angle state of the high-magnification anti-shake imaging apparatus described in this embodiment; the left drawings in fig. 2 to 4 are spherical aberration diagrams of a high-magnification anti-shake imaging apparatus described in this embodiment, the middle drawings in fig. 2 to 4 are field curvature diagrams of a high-magnification anti-shake imaging apparatus described in this embodiment, and the right drawings in fig. 2 to 4 are distortion diagrams of a high-magnification anti-shake imaging apparatus described in this embodiment.
As shown in fig. 1, a high magnification anti-shake imaging apparatus includes: a zoom lens and an image pickup element configured to receive an image formed by the zoom lens; the image pickup element is a CCD or CMOS, and the image pickup element can be disposed on the image side IMG of the zoom optical lens.
The zoom lens is composed of five lens groups.
The zoom lens sequentially comprises from an object plane side to an image plane side:
the lens comprises a fixed lens group G1 with positive focal power, a first variable power lens group G2 with negative focal power, a second variable power lens group G3 with positive focal power, an anti-shake lens group G4 with negative focal power, a focusing lens group G5 with positive focal power and an auxiliary component G6.
The first variable power lens group G2, the second variable power lens group G3 and the focusing lens group G5 move along the main optical axis direction of the zoom lens;
the fixed lens group G1 includes, in order from the object plane side to the image plane side:
a first fixed lens a1 of positive power, a second fixed lens a2 of negative power, a third fixed lens a3 of positive power, a fourth fixed lens a4 of positive power, a fifth fixed lens a5 of negative power, a sixth fixed lens a6 of positive power; the first fixed lens a1 is cemented with the second fixed lens a2, and the fifth fixed lens a5 is cemented with the sixth fixed lens a 6.
The first variable power lens group G2 includes, in order from the object plane side to the image plane side:
a first variable power lens b1 with negative power, a second variable power lens b2 with negative power, a third variable power lens b3 with positive power, a fourth variable power lens b4 with negative power, and a fifth variable power lens b5 with positive power; the third variable power lens b3, the fourth variable power lens b4, and the fifth variable power lens b5 constitute a triple cemented lens.
The second variable power lens group G3 includes, in order from the object plane side to the image plane side:
a sixth variable power lens b6 of positive power, a seventh variable power lens b7 of positive power, an eighth variable power lens b8 of negative power, a ninth variable power lens b9 of positive power; the eighth variable power lens b8 is cemented with the ninth variable power lens b 9.
The anti-shake lens group G4 includes, in order from the object plane side to the image plane side:
a first anti-shake lens c1 of negative power, and a second anti-shake lens c2 of positive power.
The focusing lens group G5 includes, in order from the object plane side to the image plane side:
a first focusing lens d1 of positive power, a second focusing lens d2 of negative power, a third focusing lens d3 of positive power, the second focusing lens d2 being cemented with the third focusing lens d 3.
The auxiliary component G6 is a piece of cover glass CG.
Table 1 shows basic lens data of the high-magnification image pickup apparatus according to the present embodiment, table 2 shows variable parameters in table 1, and table 3 shows aspheric coefficients.
The plane number column indicates the plane number when the number is increased one by one toward the image side with the plane on the object side being the 1 st plane; the surface type column shows the surface type of a certain lens; the radius of curvature of a lens is shown in the column of radius of curvature, positive radius of curvature indicates that the surface is curved in the object side direction, and negative radius of curvature indicates that the surface is curved in the image side direction; the surface spacing on the optical axis of each surface from the surface adjacent to its image side is shown in the center thickness column; the refractive index of a certain lens is shown in the refractive index column; the abbe number of a certain lens is shown in the abbe number column.
In table 2, the WIDE column indicates specific numerical values of the variable parameters when the high-magnification anti-shake imaging apparatus is in the WIDE-angle end state, and the TELE column indicates specific numerical values of the variable parameters when the high-magnification anti-shake imaging apparatus is in the telephoto end state.
In Table 3, K is the conic coefficient and e is the scientific count number, e.g. e-005 means 10-5。
[ TABLE 1 ]
[ TABLE 2 ]
[ TABLE 3 ]
In the embodiment, fw =12.5mm, ft =750mm, ft/fw =60, fno = 2.31-6.52, and TTL =350 mm;
ft is the focal length of the zoom lens in the telephoto state, fw is the focal length of the zoom lens in the wide-angle state, fno is the f-number of the zoom lens, and TTL is the total optical length of the zoom lens.
Db6=4.8mm；Db6/fw=0.384；
Db6 is the thickness of the sixth variable power lens b 6.
Db67=9.17mm，LG3=25.23mm，Db67/LG3=0.36；
LG3 is the total optical length of the second variable power lens group G3, and Db67 is the distance between the sixth variable power lens b6 and the seventh variable power lens b 7.
ΣDG1=60.5mm，LG1=64.75mm；ΣDG1/LG1=0.934；
Where Σ DG1 is the sum of the thicknesses of all lenses in the fixed lens group G1, and LG1 is the total optical length of the fixed lens group G1.
SG3=39.29mm，SG2=92.26mm；SG3/SG2=0.426；
SG5=29.15mm，SG5/SG2=0.316；
Wherein SG2 is a moving distance of the first variable magnification lens group G2, SG3 is a moving distance of the second variable magnification lens group G3, and SG5 is a moving distance of the focusing lens group G5.
fa12= 2505.82mm；fa12/ft=3.34；
Ra11=413.99，Ra22= -1051.14mm；|Ra22/ Ra11|=2.54；
Fa12 represents the focal length of the cemented first fixed lens a1 and second fixed lens a2, Ra11 represents the radius of curvature of the object-side curved surface of the first fixed lens a1, and Ra22 represents the radius of curvature of the image-side curved surface of the second fixed lens a 2.
Rc11=-34.49mm，Rc12=19.96mm，|Rc11/Rc12|=1.73；
Where Rc11 is the radius of curvature of the first anti-shake lens c1 on the object plane side curved surface, and Rc12 is the radius of curvature of the first anti-shake lens c1 on the image plane side curved surface.
ΦG4=18.6mm，ΦG1=112.12mm；ΦG4/ΦG1=0.166；
Wherein Φ G4 is an outer diameter of the anti-shake lens group G4, and Φ G1 is an outer diameter of the fixed lens group G1.
As shown in fig. 2 to 4, in both the telephoto state and the wide-angle state, as can be seen from the left-side diagram, the convergence of the three RGB colors is good, the distance between the three colors and the coordinate axis is small, and the spherical aberration of the described high-magnification anti-shake imaging device is good; as can be seen from the middle diagram, the field curvature is controlled within a better range; as can be seen from the right diagram, the distortion value is small, and the requirement of ultra-high image quality is satisfied.
Example 3
As shown in fig. 5 to 8, fig. 5 is a schematic structural diagram of another high-magnification anti-shake imaging apparatus, fig. 6 is aberration diagrams of a telescopic state of the another high-magnification anti-shake imaging apparatus described in this embodiment, fig. 7 is aberration diagrams of an intermediate state of the another high-magnification anti-shake imaging apparatus described in this embodiment, and fig. 8 is aberration diagrams of a wide-angle state of the another high-magnification anti-shake imaging apparatus described in this embodiment; the drawings on the left side in fig. 6 to 8 are spherical aberration diagrams of another high-magnification anti-shake imaging apparatus described in this embodiment, the drawings in the middle in fig. 6 to 8 are field curvature diagrams of another high-magnification anti-shake imaging apparatus described in this embodiment, and the drawings on the right side in fig. 6 to 8 are distortion diagrams of another high-magnification anti-shake imaging apparatus described in this embodiment.
As shown in fig. 5, a high magnification anti-shake imaging apparatus includes: a zoom lens and an image pickup element configured to receive an image formed by the zoom lens; the image pickup element is a CCD or CMOS, and the image pickup element can be disposed on the image side IMG of the zoom optical lens.
The zoom lens is composed of five lens groups.
The zoom lens sequentially comprises from an object plane side to an image plane side:
the lens comprises a fixed lens group G1 with positive focal power, a first variable power lens group G2 with negative focal power, a second variable power lens group G3 with positive focal power, an anti-shake lens group G4 with negative focal power, a focusing lens group G5 with positive focal power and an auxiliary component G6.
The first variable power lens group G2, the second variable power lens group G3, and the focusing lens group G5 move along the main optical axis direction of the zoom lens.
The fixed lens group G1 includes, in order from the object plane side to the image plane side:
a first fixed lens a1 of positive power, a second fixed lens a2 of negative power, a third fixed lens a3 of positive power, a fourth fixed lens a4 of positive power, a fifth fixed lens a5 of negative power, a sixth fixed lens a6 of positive power; the first fixed lens a1 is cemented with the second fixed lens a2, and the fifth fixed lens a5 is cemented with the sixth fixed lens a 6.
The first variable power lens group G2 includes, in order from the object plane side to the image plane side:
a first variable power lens b1 with negative power, a second variable power lens b2 with negative power, a third variable power lens b3 with positive power, a fourth variable power lens b4 with negative power, and a fifth variable power lens b5 with positive power; the third variable power lens b3, the fourth variable power lens b4, and the fifth variable power lens b5 constitute a triple cemented lens.
The second variable power lens group G3 includes, in order from the object plane side to the image plane side:
a sixth variable power lens b6 of positive power, a seventh variable power lens b7 of positive power, an eighth variable power lens b8 of negative power, a ninth variable power lens b9 of positive power; the eighth variable power lens b8 is cemented with the ninth variable power lens b 9.
The anti-shake lens group G4 includes, in order from the object plane side to the image plane side:
a first anti-shake lens c1 of negative power, and a second anti-shake lens c2 of positive power.
The focusing lens group G5 includes, in order from the object plane side to the image plane side:
a first focusing lens d1 of positive power, a second focusing lens d2 of negative power, a third focusing lens d3 of positive power, the second focusing lens d2 being cemented with the third focusing lens d 3.
The auxiliary component G6 is a piece of cover glass CG.
Table 4 shows basic lens data of the high-magnification image pickup apparatus according to the present embodiment, table 5 shows variable parameters in table 4, and table 6 shows aspheric coefficients.
The plane number column indicates the plane number when the number is increased one by one toward the image side with the plane on the object side being the 1 st plane; the surface type column shows the surface type of a certain lens; the radius of curvature of a lens is shown in the column of radius of curvature, positive radius of curvature indicates that the surface is curved in the object side direction, and negative radius of curvature indicates that the surface is curved in the image side direction; the surface spacing on the optical axis of each surface from the surface adjacent to its image side is shown in the center thickness column; the refractive index of a certain lens is shown in the refractive index column; the abbe number of a certain lens is shown in the abbe number column.
In table 5, the WIDE column indicates specific numerical values of the variable parameters when the high-magnification anti-shake imaging apparatus is in the WIDE-angle end state, and the TELE column indicates specific numerical values of the variable parameters when the high-magnification anti-shake imaging apparatus is in the telephoto end state.
In Table 6, K is the conic coefficient and e is the scientific count number, e.g. e-005 means 10-5。
[ TABLE 4 ]
[ TABLE 5 ]
[ TABLE 6 ]
In the embodiment, fw =12.5mm, ft =745mm, ft/fw =59.6, fno = 2.33-6.51, and TTL =342.93 mm;
ft is the focal length of the zoom lens in the telephoto state, fw is the focal length of the zoom lens in the wide-angle state, fno is the f-number of the zoom lens, and TTL is the total optical length of the zoom lens.
Db6=5.44mm；Db6/fw=0.435；
Db67=9.97mm，LG3=27.27mm，Db67/LG3=0.366；
Db6 is the thickness of the sixth variable power lens b6, LG3 is the total optical length of the second variable power lens group G3, and Db67 is the distance between the sixth variable power lens b6 and the seventh variable power lens b 7.
ΣDG1=60.39mm，LG1=63.96mm；ΣDG1/LG1=0.944；
Where Σ DG1 is the sum of the thicknesses of all lenses in the fixed lens group G1, and LG1 is the total optical length of the fixed lens group G1.
SG3=39.44mm，SG2=91.19mm；SG3/SG2=0.433；
SG5=30.42mm，SG5/SG2=0.334；
Wherein SG2 is a moving distance of the first variable magnification lens group G2, SG3 is a moving distance of the second variable magnification lens group G3, and SG5 is a moving distance of the focusing lens group G5.
fa12=2486.55mm；fa12/ft=3.34；
Ra11=395.77，Ra22=-1187.89mm；|Ra22/Ra11|=3；
Fa12 represents the focal length of the cemented first fixed lens a1 and second fixed lens a2, Ra11 represents the radius of curvature of the object-side curved surface of the first fixed lens a1, and Ra22 represents the radius of curvature of the image-side curved surface of the second fixed lens a 2.
Rc11=-34.30mm，Rc12=20.04mm，|Rc11/Rc12|=1.22；
Where Rc11 is the radius of curvature of the first anti-shake lens c1 on the object plane side curved surface, and Rc12 is the radius of curvature of the first anti-shake lens c1 on the image plane side curved surface.
ΦG4=18.28mm，ΦG1=112.18mm；ΦG4/ΦG1=0.163；
Wherein Φ G4 is an outer diameter of the anti-shake lens group G4, and Φ G1 is an outer diameter of the fixed lens group G1.
As shown in fig. 6 to 8, in both the telephoto state and the wide-angle state, as can be seen from the left-side diagram, the convergence of the three RGB colors is good, the distance between the three colors and the coordinate axis is small, and the spherical aberration of the described high-magnification anti-shake imaging device is good; as can be seen from the middle diagram, the field curvature is controlled within a better range; as can be seen from the right diagram, the distortion value is small, and the requirement of ultra-high image quality is satisfied.
Example 4
As shown in fig. 1 to 8, a zoom lens is composed of five lens groups.
The zoom lens sequentially comprises from an object plane side to an image plane side:
the zoom lens comprises a fixed lens group G1 with positive focal power, a first variable power lens group G2 with negative focal power, a second variable power lens group G3 with positive focal power, an anti-shake lens group G4 with negative focal power and a focusing lens group G5 with positive focal power.
The first variable power lens group G2, the second variable power lens group G3, and the focusing lens group G5 move along the main optical axis direction of the zoom lens.
The fixed lens group G1 includes, in order from the object plane side to the image plane side:
a first fixed lens a1 of positive power, a second fixed lens a2 of negative power, a third fixed lens a3 of positive power, a fourth fixed lens a4 of positive power, a fifth fixed lens a5 of negative power, a sixth fixed lens a6 of positive power; the first fixed lens a1 is cemented with the second fixed lens a2, and the fifth fixed lens a5 is cemented with the sixth fixed lens a 6.
The first variable power lens group G2 includes, in order from the object plane side to the image plane side:
a first variable power lens b1 with negative power, a second variable power lens b2 with negative power, a third variable power lens b3 with positive power, a fourth variable power lens b4 with negative power, and a fifth variable power lens b5 with positive power; the third variable power lens b3, the fourth variable power lens b4, and the fifth variable power lens b5 constitute a triple cemented lens.
The second variable power lens group G3 includes, in order from the object plane side to the image plane side:
a sixth variable power lens b6 of positive power, a seventh variable power lens b7 of positive power, an eighth variable power lens b8 of negative power, a ninth variable power lens b9 of positive power; the eighth variable power lens b8 is cemented with the ninth variable power lens b 9.
The anti-shake lens group G4 includes, in order from the object plane side to the image plane side:
a first anti-shake lens c1 of negative power, and a second anti-shake lens c2 of positive power.
The focusing lens group G5 includes, in order from the object plane side to the image plane side:
a first focusing lens d1 of positive power, a second focusing lens d2 of negative power, a third focusing lens d3 of positive power, the second focusing lens d2 being cemented with the third focusing lens d 3.
The zoom lens satisfies the following conditional expression:
ft/fw＞55；
0.35＜Db6/fw＜0.45；
ft is a focal length of the zoom lens in a telephoto state, fw is a focal length of the zoom lens in a wide-angle state, and Db6 is a thickness of the sixth variable power lens b 6.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a big multiplying power anti-shake camera device which characterized in that:
the method comprises the following steps:
a zoom lens;
and an image pickup element configured to receive an image formed by the zoom lens;
the zoom lens consists of five lens groups;
the zoom lens sequentially comprises from an object plane side to an image plane side:
the zoom lens comprises a fixed lens group with positive focal power, a first zoom lens group with negative focal power, a second zoom lens group with positive focal power, an anti-shake lens group with negative focal power and a focusing lens group with positive focal power;
the first zoom lens group, the second zoom lens group and the focusing lens group move along the direction of a main optical axis of the zoom lens;
the fixed lens group comprises the following components in sequence from the object plane side to the image plane side:
a first fixed lens with positive focal power, a second fixed lens with negative focal power, a third fixed lens with positive focal power, a fourth fixed lens with positive focal power, a fifth fixed lens with negative focal power and a sixth fixed lens with positive focal power; the first fixed lens is glued with the second fixed lens, and the fifth fixed lens is glued with the sixth fixed lens;
the first variable power lens group includes, in order from the object plane side to the image plane side:
the zoom lens comprises a first zoom lens with negative focal power, a second zoom lens with negative focal power, a third zoom lens with positive focal power, a fourth zoom lens with negative focal power and a fifth zoom lens with positive focal power; the third zoom lens, the fourth zoom lens and the fifth zoom lens form a triple cemented lens;
the second variable power lens group includes in order from the object plane side to the image plane side:
a sixth variable power lens with positive focal power, a seventh variable power lens with positive focal power, an eighth variable power lens with negative focal power, and a ninth variable power lens with positive focal power; the eighth variable power lens is glued with the ninth variable power lens;
the anti-shake lens group includes in order from the object plane side to the image plane side:
a first anti-shake lens with negative focal power and a second anti-shake lens with positive focal power;
the focusing lens group comprises the following components in sequence from the object plane side to the image plane side:
a first focusing lens with positive focal power, a second focusing lens with negative focal power, a third focusing lens with positive focal power, wherein the second focusing lens and the third focusing lens are glued;
the zoom lens satisfies the following conditional expression:
ft/fw＞55；
0.35＜Db6/fw＜0.45；
ft is a focal length of the zoom lens in a telephoto state, fw is a focal length of the zoom lens in a wide-angle state, and Db6 is a thickness of the sixth variable power lens.
2. The high magnification anti-shake imaging apparatus according to claim 1, characterized in that:
the image plane side curvature of the fifth variable power lens is curved toward the object plane side.
3. The high magnification anti-shake imaging apparatus according to claim 1, characterized in that:
the zoom lens satisfies the following conditional expression:
ΣDG1/LG1＞0.9；
where Σ DG1 is the sum of the thicknesses of all lenses in the fixed lens group, and LG1 is the total optical length of the fixed lens group.
4. The high magnification anti-shake imaging apparatus according to claim 1, characterized in that:
the zoom lens satisfies the following conditional expression:
0.4＜SG3/SG2＜0.45；
wherein SG2 is a moving distance of the first variable magnification lens group, and SG3 is a moving distance of the second variable magnification lens group.
5. The high magnification anti-shake imaging apparatus according to claim 4, characterized in that:
the zoom lens satisfies the following conditional expression:
0.3＜SG5/SG2＜0.35；
wherein SG5 represents a moving distance of the focusing lens group.
6. The high magnification anti-shake imaging apparatus according to claim 1, characterized in that:
the zoom lens satisfies the following conditional expression:
fa12/ft＞3；
|Ra22/Ra11|＞2；
fa12 is the focal length after the first fixed lens and the second fixed lens are cemented, Ra11 is the radius of curvature of the object-side curved surface of the first fixed lens, and Ra22 is the radius of curvature of the image-side curved surface of the second fixed lens.
7. The high magnification anti-shake imaging apparatus according to claim 1, characterized in that:
the zoom lens satisfies the following conditional expression:
Db67/LG3＞0.35；
wherein Db67 is a distance between the sixth variable power lens and the seventh variable power lens, and LG3 is an optical total length of the second variable power lens group.
8. The high magnification anti-shake imaging apparatus according to claim 1, characterized in that:
the zoom lens satisfies the following conditional expression:
0.5＜|Rc11/Rc12|＜2；
where Rc11 is the radius of curvature of the object-side curved surface of the first anti-shake lens, and Rc12 is the radius of curvature of the image-side curved surface of the first anti-shake lens.
9. The high magnification anti-shake imaging apparatus according to claim 1, characterized in that:
the zoom lens satisfies the following conditional expression:
0.15＜ΦG4/ΦG1＜0.2；
wherein Φ G4 is an outer diameter of the anti-shake lens group, and Φ G1 is an outer diameter of the fixed lens group.
10. A zoom lens composed of five lens groups,
the zoom lens sequentially comprises from an object plane side to an image plane side:
the zoom lens comprises a fixed lens group with positive focal power, a first zoom lens group with negative focal power, a second zoom lens group with positive focal power, an anti-shake lens group with negative focal power and a focusing lens group with positive focal power;
the first zoom lens group, the second zoom lens group and the focusing lens group move along the direction of a main optical axis of the zoom lens;
the fixed lens group comprises the following components in sequence from the object plane side to the image plane side:
a first fixed lens with positive focal power, a second fixed lens with negative focal power, a third fixed lens with positive focal power, a fourth fixed lens with positive focal power, a fifth fixed lens with negative focal power and a sixth fixed lens with positive focal power; the first fixed lens is glued with the second fixed lens, and the fifth fixed lens is glued with the sixth fixed lens;
the first variable power lens group includes, in order from the object plane side to the image plane side:
the zoom lens comprises a first zoom lens with negative focal power, a second zoom lens with negative focal power, a third zoom lens with positive focal power, a fourth zoom lens with negative focal power and a fifth zoom lens with positive focal power; the third zoom lens, the fourth zoom lens and the fifth zoom lens form a triple cemented lens;
the second variable power lens group includes in order from the object plane side to the image plane side:
a sixth variable power lens with positive focal power, a seventh variable power lens with positive focal power, an eighth variable power lens with negative focal power, and a ninth variable power lens with positive focal power; the eighth variable power lens is glued with the ninth variable power lens;
the anti-shake lens group includes in order from the object plane side to the image plane side:
a first anti-shake lens with negative focal power and a second anti-shake lens with positive focal power;
the focusing lens group comprises the following components in sequence from the object plane side to the image plane side:
a first focusing lens with positive focal power, a second focusing lens with negative focal power, a third focusing lens with positive focal power, wherein the second focusing lens and the third focusing lens are glued;
the zoom lens satisfies the following conditional expression:
ft/fw＞55；
0.35＜Db6/fw＜0.45；
ft is a focal length of the zoom lens in a telephoto state, fw is a focal length of the zoom lens in a wide-angle state, and Db6 is a thickness of the sixth variable power lens.
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