CN211348834U - Global high-magnification lens - Google Patents
Global high-magnification lens Download PDFInfo
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- CN211348834U CN211348834U CN201922074381.9U CN201922074381U CN211348834U CN 211348834 U CN211348834 U CN 211348834U CN 201922074381 U CN201922074381 U CN 201922074381U CN 211348834 U CN211348834 U CN 211348834U
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Abstract
The utility model discloses a global high magnification lens, which is characterized in that a first lens group with positive focal power is included in sequence from an object side to an image side; the second lens group has negative focal power; an aperture diaphragm; a third lens group having positive focal power; the fourth lens group has positive focal power; the fifth lens group is provided with positive focal power, wherein the first lens group and the fifth lens group are composed of spherical lenses, the second lens group and the fourth lens group are movably arranged, so that zooming from a wide-angle end to a telephoto end is realized by moving along an optical axis through the second lens group and the fourth lens group, and the fifth lens group is movably arranged so as to move along the optical axis through the fifth lens group to correct virtual focus brought by zooming process and object distance change. The utility model overcomes there is the low and deformation scheduling problem of definition in global face lens to lead to the formation of image quality matter of camera lens to be difficult to guarantee, and the difficult problem that reaches 4M level standard of camera lens performance provides a global face high magnification camera lens.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a global face high magnification camera lens.
[ background of the invention ]
The lens surface of the spherical lens is in spherical radian, when light rays with different wavelengths are incident to different positions on the rear lens through parallel optical axes, the problem of aberration can be formed, the quality of an image is influenced, and then phenomena such as definition reduction and deformation occur. The problem can be solved by adding a lens for correction, but the imaging quality is further weakened, and the volume and weight of the lens are increased. Therefore, high magnification lens on the market now, in order to reach higher definition, generally need use aspheric surface lens to promote the performance, save space and reduce the lens volume simultaneously, but the manufacturing cost of aspheric surface lens is higher, and it is comparatively complicated to detect, because production efficiency is low in the manufacturing, high in production cost, be unfavorable for the popularization and application of product, for this reason the enterprise is not great to volume production quantity, the higher lens product of yield requirement, often adopt global lens as optical lens component, however because global lens has the low and deformation scheduling problem of definition, make the formation of image quality matter of camera lens difficult to guarantee, lead to the difficult 4M level standard that reaches of camera lens performance.
The utility model discloses it is just based on above not enough and produce.
[ Utility model ] content
The utility model aims at overcoming prior art's not enough, providing a global face high magnification camera lens, keeping that present volume does not increase the condition under possess preceding 10 times infrared confocal, have characteristics such as low cost, high magnification, focus fast to there is good performance at whole focus section, can correspond the photographic solid-state camera element of 4M level image.
The utility model discloses a realize through following technical scheme:
a global high power lens includes, in order from an object side to an image side: a first lens group G1 having positive optical power; the second lens group G2 has negative focal power; an aperture stop S; a third lens group G3 having positive optical power; a fourth lens group G4 having positive optical power; a fifth lens group G5 having positive optical power; wherein, constitute by spherical lens from first lens group G1 to fifth lens group G5, second lens group G2 and fourth lens group G4 be movable setting to realize along the optical axis removal along wide-angle end to the variable power of telephoto end through both, thereby fifth lens group G5 is movable setting and moves along the optical axis through fifth lens group G5 and in order to rectify the virtual focus that variable power process and object distance change brought.
The global high power lens assembly as described above, wherein the first lens group G1 includes, in order from an object: the optical lens comprises a first lens 1 with negative focal power, a second lens 2 with positive focal power, a third lens 3 with positive focal power, a fourth lens 4 with positive focal power and a fifth lens 5 with negative focal power, wherein the first lens 1 and the second lens 2 are combined into a cemented lens, and the fourth lens 4 and the fifth lens 5 are combined into the cemented lens.
The global high power lens assembly as described above is characterized in that the second lens group G2 includes, in order from the object side to the image side, a sixth lens 6 with negative power, a seventh lens 7 with negative power, an eighth lens 8 with positive power, and a ninth lens 9 with negative power, the seventh lens 7 and the eighth lens 8 are combined to form a cemented lens, the third lens group G3 includes, in order from the object side, a tenth lens 10 with positive power, an eleventh lens 11 with positive power, a twelfth lens 12 with negative power, a thirteenth lens 13 with positive power, a fourteenth lens 14 with positive power, the eleventh lens 11 and the twelfth lens 12 are combined to form a cemented lens, and the fourth lens group G4 includes, in order from the object side, a fifteenth lens 15 with positive power, a sixteenth lens 16 with positive power, a ninth lens 9 with negative power, A seventeenth lens 17 with negative focal power and an eighteenth lens 18 with positive focal power, wherein the seventeenth lens 17 and the eighteenth lens 18 are combined to form a cemented lens, and the conditional expression is satisfied: nd6 is more than 1.85; nd9 is more than 1.85; nd15 is more than 1.85; nd16 is more than 1.85; nd12-Nd13 is less than 0.3; wherein Nd6, Nd9, Nd12, Nd13, Nd15, and Nd16 are refractive indices of the sixth lens sheet 6, the ninth lens sheet 9, the twelfth lens sheet 12, the thirteenth lens sheet 13, the fifteenth lens sheet 15, and the sixteenth lens sheet 16, respectively.
The global high-magnification lens is characterized by satisfying the following conditional expression: 3 < ft1/f1 < 4; -4 < f001/ft < -2.5; ft1 is the focal length of the first lens group G1 at the telephoto end, f1 is the focal length of the first lens group, f001 is the focal length of the first lens 1, and ft is the focal length of the entire system at the telephoto end.
The global high-magnification lens is characterized by satisfying the following conditional expression: f006/f2 is more than 1.5 and less than 3; fw/L1-2 is more than 18 and less than 22; ft-fw/Lt-w is more than 4.5 and less than 5.5
Wherein f006 is a focal length of the sixth lens element 6, f2 is a focal length of the second lens group G2, fw is a focal length of the entire system at the wide-angle end, ft is a focal length of the entire system at the telephoto end, L1-2 is a distance between the first lens group G2 and the second lens group G2 at the wide-angle end, and Lt-w is a moving distance of the entire system from the wide-angle end to the telephoto end.
The global high-magnification lens is characterized by satisfying the following conditional expression: f010/fw is more than 2.5 and less than 4; 2.5 < fw/f3 < 4; ft/L1-3 is more than 3.5 and less than 4.5; where f010 is a focal length of the tenth lens element 10, fw is a focal length of the entire system at the wide-angle end, f3 is a focal length of the third lens group G3, ft is a focal length of the entire system at the telephoto end, and L1-3 is a distance between the first lens group G1 and the third lens group G3.
The global high-magnification lens is characterized by satisfying the following conditional expression: 3.8 < ft4-fw4/f4 < 5.2; f4/f3 is more than 1.4 and less than 2; ft4 is the focal length of the fourth lens group G4 at the telephoto end, fw4 is the focal length of the fourth lens group G4 at the wide-angle end, f4 is the focal length of the fourth lens group G4, and f3 is the focal length of the third lens group G3.
The global high-magnification lens is characterized by satisfying the following conditional expression: fw5/f5 is more than 0.1 and less than 0.3; wherein fw5 is the focal length of the fifth lens group G5 at the wide-angle end, and f5 is the focal length of the fifth lens group G5.
The global high-magnification lens is characterized in that: the fifth lens group G5 includes a nineteenth lens 19 with positive optical power, and the nineteenth lens 19 is an ultra-low dispersion glass lens.
The global high-magnification lens is characterized in that: the aperture stop S is a P-IRIS having an approximately circular shaped aperture.
Compared with the prior art, the utility model discloses there is following advantage:
1. the utility model discloses a make second lens group removes from the object side to picture side along the optical axis, simultaneously fourth lens group remove along the optical axis, the lens group in the epaxial position with the position of second lens group corresponding to the realization is from the zoom of wide-angle end to the telephoto end, removes along the optical axis direction through removing fifth lens group simultaneously, and the virtual burnt that the correction system brought in zoom process and object distance change guarantees that the zoom in-process image picture is clear all the time. Additionally, the utility model discloses a third lens group can set up to fixed group, then changes the structure as required and makes lens group can incline or perpendicular optical axis micromotion compensate the shake of camera lens and guarantee the stability of image picture to realize camera lens entire system's anti-shake function, under the less prerequisite of the whole volume of camera lens, produce the high magnification camera lens of low cost, high performance.
2. The utility model discloses a camera lens, fifth lens group wherein is including the nineteenth lens that has positive focal power, the nineteenth lens be ultra-low dispersion glass's lens, adopt ultra-low dispersion glass material can tighten up the red light and the purple light of camera lens telescope end by a wide margin, make the camera lens can obtain more sharp color experience.
3. The utility model discloses an aperture diaphragm of camera lens adopts P-IRIS, and the shape in hole is approximate circular. Therefore, the defect that the roundness of the cat eye aperture is not high when the aperture is reduced can be avoided, and the image quality in the sagittal direction and the meridional direction in each state can be balanced and uniform.
[ description of the drawings ]
Fig. 1 is a schematic structural view of a first embodiment of the present invention;
fig. 2 is a schematic structural view of a second embodiment of the present invention;
fig. 3 is respective aberration diagrams of the first embodiment at the wide-angle end with respect to the e-line;
fig. 4 is respective aberration diagrams of the first embodiment at the wide-angle end with respect to the e-line;
FIG. 5 is respective aberration diagrams of the telephoto end with respect to the e-line of the first embodiment;
FIG. 6 is respective aberration diagrams of the telephoto end with respect to the e-line of the first embodiment;
fig. 7 is respective aberration diagrams with respect to the e-line at the wide-angle end of the second embodiment;
fig. 8 is respective aberration diagrams with respect to the e-line at the wide-angle end of the second embodiment;
FIG. 9 is respective aberration diagrams of the telephoto end with respect to the e-line of the second embodiment;
fig. 10 is each aberration diagram of the telephoto end with respect to the e-line of the second embodiment.
[ detailed description ] embodiments
The invention will be further described with reference to the accompanying drawings:
the following is a first embodiment.
As shown in fig. 1, a global high power lens includes, in order from an object side to an image side: a first lens group G1 having positive optical power; the second lens group G2 has negative focal power; an aperture stop S; a third lens group G3 having positive optical power; a fourth lens group G4 having positive optical power; a fifth lens group G5 having positive optical power; wherein, constitute by spherical lens from first lens group G1 to fifth lens group G5, second lens group G2 and fourth lens group G4 be movable setting to realize along the optical axis removal along wide-angle end to the variable power of telephoto end through both, thereby fifth lens group G5 is movable setting and moves along the optical axis through fifth lens group G5 and in order to rectify the virtual focus that variable power process and object distance change brought. When the lens is in full-light state, the second lens group G2 is moved along the optical axis from the object side to the image side, the fourth lens group G4 is moved along the optical axis, and the positions of the fourth lens group G4 and the second lens group G2 on the optical axis are corresponding to each other, so that the zoom from the wide-angle end to the telephoto end is realized, and meanwhile, the fifth lens group G5 is moved along the optical axis direction, so that the virtual focus brought by the zoom process and the object distance change of the correction system is realized, and the image picture is ensured to be always clear in the zoom process. In addition, because the third lens group G3 is a fixed group, the structure of the third lens group can be changed as required to make the lens group tilt or slightly move perpendicular to the optical axis to compensate the shake of the lens and ensure the stability of the image, so as to realize the anti-shake function of the whole lens system.
The global high-magnification lens is characterized in that: the first lens group G1 includes, in order from an object side: the lens comprises a first lens 1 with negative focal power, a second lens 2 with positive focal power, a third lens 3 with positive focal power, a fourth lens 4 with positive focal power and a fifth lens 5 with negative focal power, wherein the first lens 1 and the second lens 2 are combined into a cemented lens, and the fourth lens 4 and the fifth lens 5 are combined into the cemented lens, so that the excessive peripheral chromatic aberration of the lens is ensured through the matching of different refractive indexes and Abbe numbers of lens materials.
The global high power lens assembly as described above is characterized in that the second lens group G2 includes, in order from the object side to the image side, a sixth lens 6 with negative power, a seventh lens 7 with negative power, an eighth lens 8 with positive power, and a ninth lens 9 with negative power, the seventh lens 7 and the eighth lens 8 are combined to form a cemented lens, the third lens group G3 includes, in order from the object side, a tenth lens 10 with positive power, an eleventh lens 11 with positive power, a twelfth lens 12 with negative power, a thirteenth lens 13 with positive power, a fourteenth lens 14 with positive power, the eleventh lens 11 and the twelfth lens 12 are combined to form a cemented lens, and the fourth lens group G4 includes, in order from the object side, a fifteenth lens 15 with positive power, a sixteenth lens 16 with positive power, a ninth lens 9 with negative power, A seventeenth lens 17 with negative focal power and an eighteenth lens 18 with positive focal power, wherein the seventeenth lens 17 and the eighteenth lens 18 are combined to form a cemented lens, and the conditional expression is satisfied: nd6 is more than 1.85; nd9 is more than 1.85; nd15 is more than 1.85; nd16 is more than 1.85; nd12-Nd13 is less than 0.3; wherein Nd6, Nd9, Nd12, Nd13, Nd15, and Nd16 are refractive indices of the sixth lens sheet 6, the ninth lens sheet 9, the twelfth lens sheet 12, the thirteenth lens sheet 13, the fifteenth lens sheet 15, and the sixteenth lens sheet 16, respectively. The fifteenth lens 15 and the sixteenth lens 16 adopt a mode that a negative focal power lens and a positive focal power lens form a cemented lens, so that the magnification chromatic aberration can be effectively reduced, the refractive indexes of the fifteenth lens 15 and the sixteenth lens 16 both meet Nd >1.85, and the cemented lens is matched with a positive lens and a negative lens respectively, so that the effective aperture of light is effectively changed, and meanwhile, the light deflection angle is not large, so that the aberration is effectively compensated and improved.
The global high-magnification lens is characterized by satisfying the following conditional expression:
3＜ft1/f1＜4
-4＜f001/ft1＜-2.5
ft1 is the focal length of the first lens group G1 at the telephoto end, f1 is the focal length of the first lens group, f001 is the focal length of the first lens 1, and ft is the focal length of the entire system at the telephoto end.
The global high-magnification lens is characterized by satisfying the following conditional expression:
1.5＜f006/f2＜3
18＜fw/L1-2＜22
4.5＜(ft-fw)/Lt-w＜5.5
wherein f006 is a focal length of the sixth lens element 6, f2 is a focal length of the second lens group G2, fw is a focal length of the entire system at the wide-angle end, ft is a focal length of the entire system at the telephoto end, L1-2 is a distance between the first lens group G2 and the second lens group G2 at the wide-angle end, and Lt-w is a moving distance of the entire system from the wide-angle end to the telephoto end.
The global high-magnification lens is characterized by satisfying the following conditional expression:
2.5＜f010/fw＜4
2.5＜fw/f3＜4
3.5＜ft/L1-3＜4.5
where f010 is a focal length of the tenth lens element 10, fw is a focal length of the entire system at the wide-angle end, f3 is a focal length of the third lens group G3, ft is a focal length of the entire system at the telephoto end, and L1-3 is a distance between the first lens group G1 and the third lens group G3.
The global high-magnification lens is characterized by satisfying the following conditional expression:
3.8＜(ft4-fw4)/f4＜5.2
1.4＜f4/f3＜2
ft4 is the focal length of the fourth lens group G4 at the telephoto end, fw4 is the focal length of the fourth lens group G4 at the wide-angle end, f4 is the focal length of the fourth lens group G4, and f3 is the focal length of the third lens group G3.
The global high-magnification lens is characterized by satisfying the following conditional expression:
0.1＜fw5/f5＜0.3
wherein fw5 is the focal length of the fifth lens group G5 at the wide-angle end, and f5 is the focal length of the fifth lens group G5.
The global high-magnification lens is characterized in that: the fifth lens group G5 includes a nineteenth lens 19 with positive refractive power, the nineteenth lens 19 is an ultra-low dispersion glass lens, and the ultra-low dispersion glass material can greatly reduce red light and violet light at the telephoto end of the lens, so that the lens can obtain sharper color experience.
The global high-magnification lens is characterized in that: the aperture diaphragm 6 adopts P-IRIS, and the shape of the hole is approximately circular. Therefore, the defect that the roundness of the cat eye aperture is not high when the aperture is reduced can be avoided, and the image quality in the sagittal direction and the meridional direction in each state can be balanced and uniform.
Numerical data of the first embodiment is as follows:
EFL of 10.6 wide angle end to 329.4 telephoto end
Fno 2.15 wide-angle end-5.8 telephoto end
Where EFL is the effective focal length of the entire system and fno is the ratio of Effective Focal Length (EFL) to aperture diameter.
The following table shows the structural parameters of the first embodiment, and S1 to S36 respectively indicate the surfaces of the respective lenses shown in fig. 1, the unit of the radius of curvature is mm, and the unit of the thickness is mm. The IMG is represented by the IMG shown in fig. 1, and is an image plane, and this plane is generally a solid-state image pickup device such as a CCD or CM 0S.
| Surface number | Surface type | Radius of curvature | Thickness of | Refractive index | Abbe number |
| S1 | Spherical surface | 815.597 | 1.5 | 1.72 | 29.51 |
| S2 | Spherical surface | 129.925 | 6.05 | 1.50 | 81.61 |
| S3 | Spherical surface | -271.621 | 0.07 | ||
| S4 | Spherical surface | 114.792 | 5.05 | 1.59 | 68.62 |
| S5 | Spherical surface | INF | 0.07 | ||
| S6 | Spherical surface | 87.784 | 6.22 | 1.50 | 81.61 |
| S7 | Spherical surface | -1156.087 | 1.5 | 1.71 | 53.87 |
| S8 | Spherical surface | 300.77 | A | ||
| S9 | Spherical surface | 293.704 | 0.8 | 1.88 | 39.23 |
| S10 | Spherical surface | 34.847 | 3.21 | ||
| S11 | Spherical surface | -146.027 | 0.7 | 1.71 | 53.87 |
| S12 | Spherical surface | 22.815 | 5.65 | 2.00 | 25.44 |
| S13 | Spherical surface | -173.571 | 2.36 | ||
| S14 | Spherical surface | -55.519 | 0.8 | 1.91 | 35.26 |
| S15 | Spherical surface | 55.519 | B | ||
| S | Spherical surface | INF | 0.3 | ||
| S17 | Spherical surface | 24.145 | 3.1 | 159 | 68.62 |
| S18 | Spherical surface | -70.696 | 0.06 | ||
| S19 | Spherical surface | 16.552 | 3.95 | 1.50 | 81.61 |
| S20 | Spherical surface | -44.061 | 0.7 | 2.00 | 25.44 |
| S21 | Spherical surface | 21.043 | 0.06 | ||
| S22 | Spherical surface | 17.642 | 2.35 | 1.95 | 17.94 |
| S23 | Spherical surface | INF | 0.65 | ||
| S24 | Spherical surface | 67.011 | 0.95 | 1.70 | 30.05 |
| S25 | Spherical surface | 10.806 | C | ||
| S26 | Spherical surface | -19.018 | 0.8 | 1.88 | 39.23 |
| S27 | Spherical surface | 19.018 | 2.05 | ||
| S28 | Spherical surface | 29.702 | 5.87 | 2.00 | 25.44 |
| S29 | Spherical surface | -49.609 | 4.92 | ||
| S30 | Spherical surface | 77.639 | 5.29 | 1.78 | 25.72 |
| S31 | Spherical surface | 16.13 | 4.53 | 1.59 | 68.62 |
| S32 | Spherical surface | -23.123 | D | ||
| S33 | Spherical surface | 23.803 | 2.88 | 1.50 | 81.61 |
| S34 | Spherical surface | -127.188 | E | ||
| S35 | Spherical surface | INF | 1 | 1.52 | 64.21 |
| S36 | Spherical surface | INF | 0.7 | ||
| IMG | Spherical surface | INF | \ |
The following table shows lens zoom parameters of the first embodiment.
| Surface number | W | T |
| A | 0.5 | 66.86 |
| B | 69.36 | 3.00 |
| C | 5.07 | 33.38 |
| D | 13.15 | 1.10 |
| E | 17.88 | 1.62 |
The following is a second embodiment.
Numerical data of the second embodiment is as follows:
EFL of 10.6 wide angle end to 330 telephoto end
Fno 2.0 wide-angle end-5.8 telephoto end
Where EFL is the effective focal length of the entire system and fno is the ratio of Effective Focal Length (EFL) to aperture diameter.
The following table shows the structural parameters of the second embodiment, and S1 to S36 respectively indicate the surfaces of the respective lenses shown in fig. 2, the radius of curvature being in mm, and the thickness being in mm.
| Surface number | Surface type | Radius of curvature | Thickness of | Refractive index | Abbe number |
| S1 | Spherical surface | INF | 1.5 | 1.72 | 29.51 |
| S2 | Spherical surface | 187.130 | 5.57 | 1.50 | 81.61 |
| S3 | Spherical surface | -337.055 | 0.07 | ||
| S4 | Spherical surface | 99.911 | 7.32 | 1.59 | 68.62 |
| S5 | Spherical surface | -380.119 | 0.07 | ||
| S6 | Spherical surface | 80.317 | 8.35 | 1.50 | 81.61 |
| S7 | Spherical surface | -225.195 | 1.5 | 1.71 | 53.87 |
| S8 | Spherical surface | 179.036 | A | ||
| S9 | Spherical surface | 166.786 | 0.8 | 1.88 | 39.23 |
| S10 | Spherical surface | 40.109 | 3.50 | ||
| S11 | Spherical surface | -73.822 | 0.7 | 1.71 | 53.87 |
| S12 | Spherical surface | 23.775 | 4.71 | 2.00 | 25.44 |
| S13 | Spherical surface | -248.889 | 0.69 | ||
| S14 | Spherical surface | -101.055 | 0.8 | 1.88 | 39.23 |
| S15 | Spherical surface | 35.850 | B | ||
| S | Spherical surface | INF | 0.3 | ||
| S17 | Spherical surface | 19.381 | 2.75 | 1.59 | 68.62 |
| S18 | Spherical surface | -259.913 | 0.06 | ||
| S19 | Spherical surface | 18.053 | 2.97 | 1.50 | 81.61 |
| S20 | Spherical surface | -60.248 | 0.7 | 2.00 | 25.44 |
| S21 | Spherical surface | 72.059 | 0.06 | ||
| S22 | Spherical surface | 17.353 | 2.25 | 1.95 | 17.94 |
| S23 | Spherical surface | 627.316 | 0.25 | ||
| S24 | Spherical surface | 495.798 | 0.4 | 2.00 | 25.44 |
| S25 | Spherical surface | 10.994 | C | ||
| S26 | Spherical surface | -55.5694 | 0.8 | 1.88 | 39.23 |
| S27 | Spherical surface | 15.706 | 6.07 | ||
| S28 | Spherical surface | 35.607 | 2.27 | 2.00 | 25.44 |
| S29 | Spherical surface | -70.336 | 11.79 | ||
| S30 | Spherical surface | 396.421 | 0.6 | 1.78 | 25.72 |
| S31 | Spherical surface | 17.036 | 4.68 | 1.59 | 68.62 |
| S32 | Spherical surface | -24.054 | D | ||
| S33 | Spherical surface | 25.54 | 2.76 | 1.50 | 81.61 |
| S34 | Spherical surface | -130 | E | ||
| S35 | Spherical surface | INF | 1 | 1.52 | 64.21 |
| S36 | Spherical surface | INF | 2.6 | ||
| IMG | Spherical surface | INF | \ |
The following table shows lens zoom parameters of the first embodiment.
| Surface number | W | T |
| A | 0.5 | 64.07 |
| B | 66.14 | 2.57 |
| C | 2.96 | 31.18 |
| D | 14.42 | 1 |
| E | 18.10 | 3.3 |
Other structural parameters of the second embodiment are the same as those of the first embodiment.
In addition, the IR-CUT shown in fig. 1 is represented as an electromagnetically driven switching sheet, and the switching sheet is composed of a red sheet or a blue sheet and a transparent anti-reflection sheet, the red sheet or the blue sheet is used for filtering light and stray light of unnecessary wavelength bands, and generally used in daytime, the switching sheet is automatically switched to the transparent anti-reflection sheet at night, the transparent sheet is highly transparent to visible light and infrared light, and the high transmittance means high transmittance, so that the infrared light source can be used for compensating insufficient illumination at night when the light is weak.
The present invention is not limited to the above-described embodiments, and other modifications can be made in the form and structure, and the above-described embodiments can be modified in various ways by those skilled in the art without departing from the principle and spirit of the invention.
Claims (10)
1. A global high power lens includes, in order from an object side to an image side:
a first lens group (G1) having positive optical power;
a second lens group (G2) having a negative power;
an aperture stop (S);
a third lens group (G3) having positive optical power;
a fourth lens group (G4) having positive optical power;
a fifth lens group (G5) having positive optical power;
the zoom lens comprises a first lens group (G1) and a fifth lens group (G5), wherein the first lens group (G1) and the fifth lens group (G5) are all arranged movably, so that zooming from a wide angle end to a telephoto end is achieved by moving the first lens group (G2) and the fourth lens group (G4) along an optical axis through the first lens group and the fourth lens group, and the fifth lens group (G5) is arranged movably and moves along the optical axis through the fifth lens group (G5) so as to correct virtual focus brought by a zooming process and object distance change.
2. The global high power lens assembly as claimed in claim 1, wherein said first lens group (G1) comprises, in order from an object side: the optical lens comprises a first lens (1) with negative focal power, a second lens (2) with positive focal power, a third lens (3) with positive focal power, a fourth lens (4) with positive focal power and a fifth lens (5) with negative focal power, wherein the first lens (1) and the second lens (2) are combined into a cemented lens, and the fourth lens (4) and the fifth lens (5) are combined into the cemented lens.
3. The global high power lens according to claim 1, wherein the second lens group (G2) comprises, in order from the object side to the image side, a sixth lens (6) having a negative power, a seventh lens (7) having a negative power, an eighth lens (8) having a positive power, and a ninth lens (9) having a negative power, the seventh lens (7) and the eighth lens (8) are combined to form a cemented lens, the third lens group (G3) comprises, in order from the object side, a tenth lens (10) having a positive power, an eleventh lens (11) having a positive power, a twelfth lens (12) having a negative power, a thirteenth lens (13) having a positive power, and a fourteenth lens (14) having a positive power, the eleventh lens (11) and the twelfth lens (12) are combined to form a cemented lens, the fourth lens group (G4) comprises a fifteenth lens (15) with negative focal power, a sixteenth lens (16) with positive focal power, a seventeenth lens (17) with negative focal power and an eighteenth lens (18) with positive focal power in sequence from the object side, the seventeenth lens (17) and the eighteenth lens (18) are combined to form a cemented lens, and the conditional expression is satisfied:
Nd6＞1.85；Nd9＞1.85；Nd15＞1.85；Nd16＞1.85
Nd12-Nd13＜0.3
the refractive indexes of the sixth lens (6), the ninth lens (9), the twelfth lens (12), the thirteenth lens (13), the fifteenth lens (15) and the sixteenth lens (16) are Nd6, Nd9, Nd12, Nd13, Nd15 and Nd16 respectively.
4. The global high magnification lens of claim 3, wherein the conditional expression is satisfied:
3＜ft1/f1＜4
-4＜f001/ft＜-2.5
wherein ft1 is the focal length of the first lens group (G1) at the far end, f1 is the focal length of the first lens group, f001 is the focal length of the first lens (1), and ft is the focal length of the whole system at the far end.
5. The global high magnification lens of claim 3, wherein the conditional expression is satisfied:
1.5＜f006/f2＜3
18＜fw/L1-2＜22
4.5＜(ft-fw)/Lt-w＜5.5
wherein f006 is a focal length of the sixth lens element (6), f2 is a focal length of the second lens group (G2), fw is a focal length of the entire system at the wide-angle end, ft is a focal length of the entire system at the telephoto end, L1-2 is a distance between the first lens group (G1) and the second lens group (G2) at the wide-angle end, and Lt-w is a moving distance of the entire system lens group from the wide-angle end to the telephoto end.
6. The global high magnification lens of claim 3, wherein the conditional expression is satisfied:
2.5＜f010/fw＜4
2.5＜fw/f3＜4
3.5＜ft/L1-3＜4.5
wherein f010 is a focal length of the tenth lens (10), fw is a focal length of the entire system at the wide angle end, f3 is a focal length of the third lens group (G3), ft is a focal length of the entire system at the telephoto end, and L1-3 is a distance from the first lens group (G1) to the third lens group (G3).
7. The global high magnification lens of claim 3, wherein the conditional expression is satisfied:
3.8＜(ft4-fw4)/f4＜5.2
1.4＜f4/f3＜2
ft4 is the focal length of the fourth lens group (G4) at the telephoto end, fw4 is the focal length of the fourth lens group (G4) at the wide-angle end, f4 is the focal length of the fourth lens group (G4), and f3 is the focal length of the third lens group (G3).
8. The global high magnification lens of claim 3, wherein the conditional expression is satisfied:
0.1＜fw5/f5＜0.3
wherein fw5 is the focal length of the fifth lens group (G5) at the wide-angle end, and f5 is the focal length of the fifth lens group (G5).
9. The global high power lens of claim 3, wherein: the fifth lens group (G5) comprises a nineteenth lens (19) with positive focal power, and the nineteenth lens (19) is made of ultra-low dispersion glass.
10. The global high power lens of claim 3, wherein: the aperture stop (S) is a P-IRIS having an approximately circular aperture.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110941080A (en) * | 2019-11-26 | 2020-03-31 | 中山联合光电科技股份有限公司 | Global high-magnification lens |
| EP4209815A4 (en) * | 2020-09-04 | 2024-04-03 | Autel Robotics Co., Ltd. | Photographing camera and unmanned aerial vehicle |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110941080A (en) * | 2019-11-26 | 2020-03-31 | 中山联合光电科技股份有限公司 | Global high-magnification lens |
| EP4209815A4 (en) * | 2020-09-04 | 2024-04-03 | Autel Robotics Co., Ltd. | Photographing camera and unmanned aerial vehicle |
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