CN108169881B - Automatic focusing camera camera lens - Google Patents
Automatic focusing camera camera lens Download PDFInfo
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- CN108169881B CN108169881B CN201810052855.7A CN201810052855A CN108169881B CN 108169881 B CN108169881 B CN 108169881B CN 201810052855 A CN201810052855 A CN 201810052855A CN 108169881 B CN108169881 B CN 108169881B
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
Abstract
A kind of automatic focusing camera camera lens successively includes: the first lens group, diaphragm, the second lens group with positive light coke and the condenser lens with negative power with negative power from the object side to image side；The present invention has the characteristics that small in size, lightweight, high image quality, focusing range are wide.
Description
Technical field
The present invention relates to a kind of technology in optical device field, specifically a kind of automatic focusing camera camera lens.
Background technique
Unmanned plane and video conference at present generally uses tight shot with Portable belt and installation, but conventional tight shot is poly-
Burnt position often immobilizes, and distant objects or near objects can not blur-free imagings in picture while causing pixel lower；And
The fixed aperture of tight shot is easy the overexposure under ambient lighting situation of change.Existing settling mode includes increasing eyeglass etc.,
But it equally will cause the increase of camera lens volume and weight in this way, and also more intractable field angle is smaller and that distorts lacks for this kind of camera lens
It falls into.
Summary of the invention
The present invention In view of the above shortcomings of the prior art, proposes a kind of automatic focusing camera camera lens, have it is small in size,
The features such as lightweight, high image quality, wide focusing range.
The present invention is achieved by the following technical solutions:
The present invention successively includes: the first lens group with negative power, diaphragm, has positive light coke from the object side to image side
The second lens group and condenser lens with negative power.
First lens group includes: the first eyeglass with negative power, the second eyeglass with negative power, tool
There is the third eyeglass of positive light coke.
Second lens group includes: the 4th eyeglass with positive light coke, the with negative power the 5th glued mirror
Piece, the 6th eyeglass with positive light coke, the 7th eyeglass with positive light coke.
Third, the 6th eyeglass and the equal aspherical lens of condenser lens.
The total length of automatic focusing camera camera lens of the present invention and the ratio of effective focal length are (2.6,4.6), preferably
For (3.2,4), the ratio of total length and image height is (1.8,2).
The ratio of the effective focal length of the focal length and automatic focusing camera camera lens of first lens group is (- 1.7, -1),
To guarantee that field angle maximizes, and image quality is further promoted.
The ratio of the effective focal length of the focal length and automatic focusing camera camera lens of second lens group is (0.9,1.4),
To realize the miniaturization of camera lens, while image quality is further promoted.
The ratio of the effective focal length of the focal length and automatic focusing camera camera lens of the condenser lens is (- 2.8, -1.2),
In favor of the reduction at key light angle, while being convenient for the reduction of focusing amount.
The lens design use athermal design, i.e., the refractive index of the four, the 6th and the 7th eyeglass with temperature change
Rate is less than zero, by the face type and focal power of reasonable distribution eyeglass, influence of the eyeglass in temperature changing process to rear coke
It cancels out each other, so that camera lens not empty coke under high/low temperature, to reach the purpose used in more complex environments.
Technical effect
Compared with prior art, lens length < 30mm of the present invention, front end bore < 19mm, total weight < 19g are adapted to an English
Very little 20,000,000 pixel image sensor, 5K image quality；90 degree of wide-angles are undistorted；With auto iris and automatic focusing function, focusing
Range is wide, the advantages that from 0.3m to infinity.
Detailed description of the invention
Fig. 1 is the semi-cutaway of embodiment 1；
Fig. 2 is each aberration diagram of embodiment 1；
Fig. 3 is the light chromaticity difference diagram of embodiment 1；
Fig. 4 is each aberration diagram of embodiment 2；
Fig. 5 is the light chromaticity difference diagram of embodiment 2；
Fig. 6 is each aberration diagram of embodiment 3；
Fig. 7 is the light chromaticity difference diagram of embodiment 3；
In figure: S1~S20 is the first to the 20th surface, F1~F3 be the first, second lens group and condenser lens, L1~
L8 is the first to the 8th eyeglass, STP is diaphragm surface, ICF is optical filter surface, the radius of curvature that R is each surface, and represents
Aspherical paraxial curvature, D be Current surface to the refractive index that the distance on next surface, Nd are d line, vd be Abbe number, object
Away from for infinity；The unit of length measuring is mm.
Specific embodiment
Embodiment 1
As shown in Figure 1, the present embodiment includes: the first lens group F1 with negative power, diaphragm STP, has positive light focus
Second lens group F2 of degree；And the condenser lens F3 with negative power.
The first lens group F1 includes: first to third eyeglass L1, L2, L3, in which: L3 is Glass aspheric mirror
Piece.
The second lens group F2 includes: the 4th to the 7th eyeglass L4, L5, L6 and L7, in which: and L5 is cemented doublet,
L6 is Glass aspheric eyeglass.
The condenser lens F3 is plastic aspherical element eyeglass L8.
It is non-spherical lens that " * " is indicated in table.
Third eyeglass L3, the 6th eyeglass L6 and the 8th eyeglass L8 are non-spherical lens, non-spherical lens in the present embodiment
Coefficient formula is as follows:
Wherein: Z is the sag value of lens, c
For the inverse of radius of curvature, h is lens side to the height of optical axis, and k is circular cone coefficient, and A, B, C, D and E respectively represent high-order aspheric
Face coefficient.
The present embodiment asphericity coefficient is listed in the table below:
Parameter list under different object distances:
| It is infinite | 1m | 0.3m | |
| Focal length F | 8.25 | 8.2 | 8.15 |
| Fno | 2.41 | 2.4 | 2.39 |
| D1 | It is infinite | 1000 | 300 |
| D2 | 0.58 | 0.72 | 1.1 |
| D3 | 3.14 | 3 | 2.62 |
| FOV | 90.3 | 90.5 | 90.7 |
As shown in Fig. 2, being each aberration diagram of embodiment 1, including axial chromatic aberration, the curvature of field and distortion.It can be seen from the figure that should
Camera lens axial chromatic aberration has obtained good correction, blur-free imaging may be implemented, while distortion curve can be seen that distortion very
It is small, meet undistorted requirement.As shown in figure 3, being magnification chromatic aberration diagram, the present embodiment has carried out good amendment to ratio chromatism,
Meet very-high solution requirement.
Embodiment 2
The present embodiment lens parameters are as shown in the table:
The present embodiment asphericity coefficient is listed in the table below:
| S5 | S6 | S13 | S14 | S17 | S18 | |
| K | 1.8027 | 6.1312 | -0.1532 | -0.1781 | -6.5300 | -3.7722 |
| A | 0.0007 | 0.0008 | 0.0004 | 0.0002 | -0.0047 | -0.0036 |
| B | -4.71E-06 | 0.0002 | 3.91E-05 | 5.01E-05 | 0.0001 | 9.70E-05 |
| C | 4.35E-06 | -5.68E-05 | 1.35E-06 | -3.22E-07 | -3.98E-08 | -1.20E-06 |
| D | -8.37E-07 | 7.78E-06 | -4.02E-08 | 3.86E-08 | -3.34E-08 | 3.47E-10 |
| E | 8.35E-08 | -2.03E-07 | -2.17E-09 | -5.33E-10 | -6.02E-11 | 1.26E-10 |
Parameter list under different object distances:
| It is infinite | 1m | 0.3m | |
| Focal length F | 8.35 | 8.3 | 8.25 |
| Fno | 2.61 | 2.6 | 2.59 |
| D1 | It is infinite | 1000 | 300 |
| D2 | 0.57 | 0.71 | 1.06 |
| D3 | 3.24 | 3.1 | 2.75 |
| FOV | 90.1 | 90.3 | 90.5 |
As shown in figure 4, being each aberration diagram of embodiment 2, including axial chromatic aberration, the curvature of field and distortion.It can be seen from the figure that should
Camera lens axial chromatic aberration has obtained good correction, blur-free imaging may be implemented, while distortion curve can be seen that distortion very
It is small, meet undistorted requirement.As shown in figure 5, being magnification chromatic aberration diagram, the present embodiment has carried out good amendment to ratio chromatism,
Meet very-high solution requirement.
Embodiment 3
This embodiment differs from embodiment 1 in that: the field angle of the present embodiment is bigger, and aperture is bigger, third eyeglass
L3 and the 6th eyeglass L6 uses plastic aspherical element eyeglass.
The present embodiment include: the first lens group F1 with negative power, diaphragm STP, second with positive light coke thoroughly
Microscope group F2；And the condenser lens F3 with negative power.
The first lens group F1 includes: first to third eyeglass L1, L2, L3, in which: L3 is plastic aspherical element mirror
Piece.
The second lens group F2 includes: the 4th to the 7th eyeglass L4, L5, L6 and L7, in which: and L5 is cemented doublet,
L6 is plastic aspherical element eyeglass.
The condenser lens F3 is plastic aspherical element eyeglass L8.
| R | D | Nd | Vd | |
| OBJ | D1 | |||
| 1 | 11.09 | 0.78 | 1.49 | 70.5 |
| 2 | 5.41 | 1.91 | ||
| 3 | 9.7 | 0.92 | 1.549 | 61.2 |
| 4 | 4.65 | 0.94 | ||
| 5 | 7.3 | 1.04 | 1.64 | 23 |
| 6 | 5.9 | 3.15 | ||
| STP | 0.28 | |||
| 8 | 30.3 | 2.21 | 1.549 | 68.2 |
| 9 | -6.5 | 3.40 | ||
| 10 | 15.51 | 3.32 | 1.49 | 81.5 |
| 11 | -7.21 | 0.50 | ||
| 12 | -50.59 | 0.30 | ||
| 13 | -12.48 | 2.86 | 1.54 | 56 |
| 14 | -4.91 | 0.10 | ||
| 15 | 50.17 | 3.61 | 1.549 | 68.2 |
| 16 | -11.39 | D2 | ||
| 17 | 6.10 | 0.90 | 1.64 | 23 |
| 18 | 3.36 | D3 | ||
| 19 | 0.8 | 1.51 | 64.2 | |
| 20 | 1.2 | |||
| IMG | 0 |
The present embodiment asphericity coefficient is listed in the table below:
Parameter list under different object distances:
| It is infinite | 1m | 0.3m | |
| Focal length F | 7.05 | 7 | 6.95 |
| Fno | 2.01 | 2.0 | 1.99 |
| D1 | It is infinite | 1000 | 300 |
| D2 | 0.48 | 0.6 | 0.98 |
| D3 | 3.32 | 3.2 | 2.82 |
| FOV | 97.8 | 98 | 98.2 |
As shown in fig. 6, being each aberration diagram of embodiment 3, including axial chromatic aberration, the curvature of field and distortion.It can be seen from the figure that should
Camera lens axial chromatic aberration has obtained good correction, blur-free imaging may be implemented, while distortion curve can be seen that distortion very
It is small, meet undistorted requirement.As shown in fig. 7, being magnification chromatic aberration diagram, the present embodiment has carried out good amendment to ratio chromatism,
Meet very-high solution requirement.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the principle of the invention and objective with difference
Mode carry out local directed complete set to it, protection scope of the present invention is subject to claims and not by above-mentioned specific implementation institute
Limit, each implementation within its scope is by the constraint of the present invention.
Claims (6)
1. a kind of automatic focusing camera camera lens, which is characterized in that from the object side to image side successively include: first with negative power
Lens group, diaphragm, the second lens group with positive light coke and the condenser lens with negative power；
First lens group includes: the first eyeglass with negative power, the second eyeglass with negative power, has just
The third eyeglass of focal power, in which: the object side of the first eyeglass be it is convex, image side surface be it is recessed, the object side of the second eyeglass be it is convex, as
Side be it is recessed, the object side of third eyeglass be it is convex, image side surface is recessed；
Second lens group includes: the 4th eyeglass with positive light coke, the 5th cemented doublet with negative power, tool
The 6th eyeglass, the 7th eyeglass with positive light coke for having positive light coke, in which: the 4th eyeglass is biconvex eyeglass, the 6th eyeglass
Object side be it is recessed, image side surface be it is convex, the 7th eyeglass be biconvex eyeglass；
The object side of the condenser lens be it is convex, image side surface be it is recessed；
The ratio of the effective focal length of the focal length and automatic focusing camera camera lens of first lens group is (- 1.7, -1)；
The ratio of the effective focal length of the focal length and automatic focusing camera camera lens of second lens group is (0.9,1.4)；
The ratio of the effective focal length of the focal length and automatic focusing camera camera lens of the condenser lens is (- 2.8, -1.2)；
The lens design uses athermal design, i.e. the refractive index variation with temperature rate of the four, the 6th and the 7th eyeglass
Less than zero.
2. automatic focusing camera camera lens according to claim 1, characterized in that third, the 6th eyeglass and the focusing
The equal aspherical lens of lens.
3. automatic focusing camera camera lens according to claim 1, characterized in that the automatic focusing camera camera lens it is total
The ratio of length and effective focal length is (2.6,4.6).
4. automatic focusing camera camera lens according to claim 1 or 3, characterized in that the automatic focusing camera camera lens
Total length and the ratio of effective focal length be (3.2,4), the ratio of the total length of automatic focusing camera camera lens and image height be (1.8,
2)。
5. automatic focusing camera camera lens according to claim 1, characterized in that the third eyeglass L3, the 6th eyeglass
L6 and the 8th eyeglass L8 is non-spherical lens, and non-spherical lens coefficient formula is as follows:
Wherein: Z is the sag value of lens, and c is song
The inverse of rate radius, h are lens side to the height of optical axis, and k is circular cone coefficient, and A, B, C, D and E respectively represent order aspherical system
Number.
6. according to automatic focusing camera camera lens described in any of the above-described claim, characterized in that the automatic focusing camera
Camera lens be it is following any one:
1. the radius of curvature of the object side of the first eyeglass is 10.68, lens thickness 0.7, refractive index 1.59, Abbe number is
61.3；The radius of curvature of the image side surface of first eyeglass is 5.32, the image side surface of the first eyeglass to the object side of the second eyeglass away from
From being 1.26；
The radius of curvature of the object side of second eyeglass is 8.74, lens thickness 0.5, refractive index 1.52, and Abbe number is
64.2；The radius of curvature of the image side surface of second eyeglass is 4.6, the distance of the image side surface of the second eyeglass to the object side of third eyeglass
It is 0.9；
The radius of curvature of the object side of third eyeglass is 5.57, lens thickness 1.56, refractive index 1.69, and Abbe number is
53.2；The radius of curvature of the image side surface of third eyeglass is 6.837, and the distance of image side surface to the diaphragm of third eyeglass is 1.66；
The distance of diaphragm to the object side of the 4th eyeglass is 2.18；
The radius of curvature of the object side of 4th eyeglass is 21.7, lens thickness 1.92, refractive index 1.59, and Abbe number is
61.2；The radius of curvature of the image side surface of 4th eyeglass is -7.1, the image side surface of the 4th eyeglass to the object side of the 5th eyeglass away from
From being 0.97；
The radius of curvature of the object side of the front lens of 5th eyeglass is 9.95, and the front lens of the 5th eyeglass reflects with a thickness of 2.54
Rate is 1.497, Abbe number 81.5；The radius of curvature of the image side surface of the front lens of 5th eyeglass is -18.3, the 5th eyeglass
Rear lens with a thickness of 0.5, refractive index 1.91, Abbe number 35.2；The curvature of the image side surface of the rear lens of 5th eyeglass
Radius is 16.9, and the distance of image side surface to the object side of the 6th eyeglass of the rear lens of the 5th eyeglass is 1.29；
The radius of curvature of the object side of 6th eyeglass is -9.2, lens thickness 2.68, refractive index 1.497, and Abbe number is
81.5；The radius of curvature of the image side surface of 6th eyeglass is -6.43, the image side surface of the 6th eyeglass to the object side of the 7th eyeglass away from
From being 0.1；
The radius of curvature of the object side of 7th eyeglass is 20.2, lens thickness 4.04, refractive index 1.59, and Abbe number is
68.6；The radius of curvature of the image side surface of 7th eyeglass is -12.5；
The radius of curvature of the object side of 8th eyeglass is 5.16, lens thickness 1.2, refractive index 1.64, Abbe number 23；
The radius of curvature of the image side surface of 8th eyeglass is 3.14；
The object side of third eyeglass is aspherical, circular cone coefficient 1.50966, and quadravalence asphericity coefficient is 0.0008, and six ranks are non-
Asphere coefficient is -2.32E-05, and eight rank asphericity coefficients are 1.39E-05, and ten rank asphericity coefficients are -2.95E-06, ten second orders
Asphericity coefficient is 2.99E-07；
The image side surface of third eyeglass is aspherical, circular cone coefficient 4.5483, and quadravalence asphericity coefficient is 0.00064, and six ranks are non-
Asphere coefficient is 0.0003, and eight rank asphericity coefficients are -0.00012, and ten rank asphericity coefficients are 2.22E-05, ten second order aspheric
Face coefficient is -1.68E-06；
The object side of 6th eyeglass be it is aspherical, circular cone coefficient be -0.1537, quadravalence asphericity coefficient be 0.000406, six ranks
Asphericity coefficient is 3.68E-05, and eight rank asphericity coefficients are 7.61E-07, and ten rank asphericity coefficients are -3.83E-08,12
Rank asphericity coefficient is 1.31E-09；
The image side surface of 6th eyeglass be it is aspherical, circular cone coefficient be -0.324467, quadravalence asphericity coefficient be -1.77E-05, six
Rank asphericity coefficient be 6.72E-05, eight rank asphericity coefficients be -1.70E-06, ten rank asphericity coefficients be 8.38E-08, ten
Second order asphericity coefficient is -4.21E-10；
The object side of 8th eyeglass be it is aspherical, circular cone coefficient be -6.75017, quadravalence asphericity coefficient be -0.00501, six ranks
Asphericity coefficient is 0.000154, eight rank asphericity coefficients be 2.24E-10, ten rank asphericity coefficients be -3.84E-08,12
Rank asphericity coefficient is 1.49E-11；
The image side surface of 8th eyeglass be it is aspherical, circular cone coefficient be -3.81638, quadravalence asphericity coefficient be -0.003864, six
Rank asphericity coefficient be 0.000103, eight rank asphericity coefficients be -1.31E-06, ten rank asphericity coefficients be 1.57E-09, ten
Second order asphericity coefficient is 1.10E-10；
2. the radius of curvature of the object side of the first eyeglass is 12.075, lens thickness 0.7, refractive index 1.52, Abbe number
It is 64.2；The radius of curvature of the image side surface of first eyeglass is 5.54, the image side surface of the first eyeglass to the object side of the second eyeglass
Distance is 1.3；
The radius of curvature of the object side of second eyeglass is 9.487, lens thickness 0.5, refractive index 1.52, and Abbe number is
64.2；The radius of curvature of the image side surface of second eyeglass is 4.911, the image side surface of the second eyeglass to the object side of third eyeglass away from
From being 0.9；
The radius of curvature of the object side of third eyeglass is 5.644, lens thickness 1.6, refractive index 1.77, and Abbe number is
49；The radius of curvature of the image side surface of third eyeglass is 7.794, and the distance of image side surface to the diaphragm of third eyeglass is 1.6；
The distance of diaphragm to the object side of the 4th eyeglass is 2.3；
The radius of curvature of the object side of 4th eyeglass is 25.015, lens thickness 1.9, refractive index 1.58, and Abbe number is
63；The radius of curvature of the image side surface of 4th eyeglass is -7.006, the image side surface of the 4th eyeglass to the object side of the 5th eyeglass away from
From being 0.5；
The radius of curvature of the object side of the front lens of 5th eyeglass is 10.389, the front lens of the 5th eyeglass with a thickness of 2.4, folding
Penetrating rate is 1.49, Abbe number 81.5；The radius of curvature of the image side surface of the rear lens of 5th eyeglass is -16.286, the 5th mirror
The rear lens of piece with a thickness of 0.5, refractive index 1.93, Abbe number 35.5；The image side surface of the rear lens of 5th eyeglass
Radius of curvature is 18.516, and the distance of image side surface to the object side of the 6th eyeglass of the rear lens of the 5th eyeglass is 1.26；
The radius of curvature of the object side of 6th eyeglass is -8.641, lens thickness 3, refractive index 1.49, and Abbe number is
81.5；The radius of curvature of the image side surface of 6th eyeglass is -6.55, the image side surface of the 6th eyeglass to the object side of the 7th eyeglass away from
From being 0.1；
The radius of curvature of the object side of 7th eyeglass is 22.654, lens thickness 3.9, refractive index 1.58, and Abbe number is
61.2；The radius of curvature of the image side surface of 7th eyeglass is -12.327；
The radius of curvature of the object side of 8th eyeglass is 5.594, lens thickness 1.2, refractive index 1.64, and Abbe number is
23；The radius of curvature of the image side surface of 8th eyeglass is 3.516；
The object side of third eyeglass is aspherical, circular cone coefficient 1.8027, and quadravalence asphericity coefficient is 0.0007, six rank aspheric
Face coefficient is -4.71E-06, and eight rank asphericity coefficients are 4.35E-06, and ten rank asphericity coefficients are -8.37E-07, and ten second orders are non-
Asphere coefficient is 8.35E-08；
The image side surface of third eyeglass is aspherical, circular cone coefficient 6.1312, and quadravalence asphericity coefficient is 0.0008, six rank aspheric
Face coefficient is 0.0002, and eight rank asphericity coefficients are -5.68E-05, and ten rank asphericity coefficients are 7.78E-06, ten second order aspheric
Face coefficient is -2.03E-07；
The object side of 6th eyeglass be it is aspherical, circular cone coefficient be -0.1532, quadravalence asphericity coefficient be 0.0004, six ranks are non-
Asphere coefficient is 3.91E-05, and eight rank asphericity coefficients are 1.35E-06, and ten rank asphericity coefficients are -4.02E-08, ten second orders
Asphericity coefficient is -2.17E-09；
The image side surface of 6th eyeglass be it is aspherical, circular cone coefficient be -0.1781, quadravalence asphericity coefficient be 0.0002, six ranks are non-
Asphere coefficient is 5.01E-05, and eight rank asphericity coefficients are -3.22E-07, and ten rank asphericity coefficients are 3.86E-08, ten second orders
Asphericity coefficient is -5.33E-10；
The object side of 8th eyeglass be it is aspherical, circular cone coefficient be -6.53, quadravalence asphericity coefficient be -0.0047, six rank aspheric
Face coefficient is 0.0001, and eight rank asphericity coefficients are -3.98E-08, and ten rank asphericity coefficients are -3.34E-08, ten second order aspheric
Face coefficient is -6.02E-11；
The image side surface of 8th eyeglass be it is aspherical, circular cone coefficient be -3.7722, quadravalence asphericity coefficient be -0.0036, six ranks are non-
Asphere coefficient is 9.70E-05, and eight rank asphericity coefficients are -1.20E-06, and ten rank asphericity coefficients are 3.47E-10, ten second orders
Asphericity coefficient is 1.26E-10；
3. the radius of curvature of the object side of the first eyeglass is 11.09, lens thickness 0.78, refractive index 1.49, Abbe number
It is 70.5；The radius of curvature of the image side surface of first eyeglass is 5.41, the image side surface of the first eyeglass to the object side of the second eyeglass
Distance is 1.91；
The radius of curvature of the object side of second eyeglass is 9.7, lens thickness 0.92, refractive index 1.549, and Abbe number is
61.2；The radius of curvature of the image side surface of second eyeglass is 4.65, the image side surface of the second eyeglass to the object side of third eyeglass away from
From being 0.94；
The radius of curvature of the object side of third eyeglass is 7.3, lens thickness 1.04, refractive index 1.64, Abbe number 23；
The radius of curvature of the image side surface of third eyeglass is 5.9, and the distance of image side surface to the diaphragm of third eyeglass is 3.15；
The distance of diaphragm to the object side of the 4th eyeglass is 0.28；
The radius of curvature of the object side of 4th eyeglass is 30.3, lens thickness 2.21, refractive index 1.549, and Abbe number is
68.2；The radius of curvature of the image side surface of 4th eyeglass is -6.5, the image side surface of the 4th eyeglass to the object side of the 5th eyeglass away from
From being 3.4；
The radius of curvature of the object side of the front lens of 5th eyeglass is 15.51, the front lens of the 5th eyeglass with a thickness of 3.32, folding
Penetrating rate is 1.49, Abbe number 81.5；The radius of curvature of the image side surface of the front lens of 5th eyeglass is -7.21, the 5th eyeglass
Rear lens with a thickness of 0.5；The radius of curvature of the image side surface of the rear lens of 5th eyeglass is -50.59, the rear mirror of the 5th eyeglass
The distance of the image side surface of piece to the object side of the 6th eyeglass is 0.3；
The radius of curvature of the object side of 6th eyeglass is -12.48, lens thickness 2.86, refractive index 1.54, and Abbe number is
56；The radius of curvature of the image side surface of 6th eyeglass is -4.91, the distance of the image side surface of the 6th eyeglass to the object side of the 7th eyeglass
It is 0.1；
The radius of curvature of the object side of 7th eyeglass is 50.17, lens thickness 3.61, refractive index 1.549, and Abbe number is
68.2；The radius of curvature of the image side surface of 7th eyeglass is -11.39；
The radius of curvature of the object side of 8th eyeglass is 6.1, lens thickness 0.9, refractive index 1.64, Abbe number 23；
The radius of curvature of the image side surface of 8th eyeglass is 3.36；
The object side of third eyeglass is aspherical, circular cone coefficient 2.5115, and quadravalence asphericity coefficient is 0.0019, six rank aspheric
Face coefficient is -9.59E-05, and eight rank asphericity coefficients are 1.17E-05, and ten rank asphericity coefficients are -2.73E-06, and ten second orders are non-
Asphere coefficient is 2.24E-07；
The image side surface of third eyeglass is aspherical, circular cone coefficient 0.7342, and quadravalence asphericity coefficient is 0.0028, six rank aspheric
Face coefficient is 0.0003, and eight rank asphericity coefficients are -0.0001, and ten rank asphericity coefficients are 1.78E-05, and ten second orders are aspherical
Coefficient is -1.61E-06；
The object side of 6th eyeglass be it is aspherical, circular cone coefficient be -3.8544, quadravalence asphericity coefficient be 0.0014, six ranks are non-
Asphere coefficient is 3.07E-05, and eight rank asphericity coefficients are -5.58E-07, and ten rank asphericity coefficients are -4.15E-08, ten second orders
Asphericity coefficient is 1.69E-09；
The image side surface of 6th eyeglass be it is aspherical, circular cone coefficient be -1.1561, quadravalence asphericity coefficient be 0.0011, six ranks are non-
Asphere coefficient is 4.72E-05, and eight rank asphericity coefficients are -1.10E-06, and ten rank asphericity coefficients are 5.77E-08, ten second orders
Asphericity coefficient is -1.96E-09；
The object side of 8th eyeglass be it is aspherical, circular cone coefficient be -7.5267, quadravalence asphericity coefficient be -0.0037, six ranks are non-
Asphere coefficient is 5.97E-05, and eight rank asphericity coefficients are 1.09E-07, and ten rank asphericity coefficients are -3.04E-08, ten second orders
Asphericity coefficient is 1.34E-10；
The image side surface of 8th eyeglass be it is aspherical, circular cone coefficient be -3.6851, quadravalence asphericity coefficient be -0.0036, six ranks are non-
Asphere coefficient is 9.54E-05, and eight rank asphericity coefficients are -1.58E-06, and ten rank asphericity coefficients are 1.09E-08, ten second orders
Asphericity coefficient is 1.03E-10.
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