CN211180378U - Large-light-transmission zoom lens capable of being used in day and night - Google Patents
Large-light-transmission zoom lens capable of being used in day and night Download PDFInfo
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- CN211180378U CN211180378U CN202020136763.XU CN202020136763U CN211180378U CN 211180378 U CN211180378 U CN 211180378U CN 202020136763 U CN202020136763 U CN 202020136763U CN 211180378 U CN211180378 U CN 211180378U
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Abstract
The utility model relates to a camera lens technical field. The utility model discloses a large-light-transmission zoom lens for both day and night use, which is provided with thirteen lenses, wherein a focusing lens group is formed by a first lens to a third lens, a zooming lens group is formed by a fourth lens to an eleventh lens, and a fixed lens group is formed by a twelfth lens and a thirteenth lens; the diaphragm is arranged between the third lens and the fourth lens, the second lens and the third lens are mutually cemented, the object side surface and the image side surface of the fourth lens are both aspheric surfaces, and the refractive indexes and the surface types of the first lens to the thirteenth lens are correspondingly designed. The utility model has the advantages of large light transmission; the transfer function is well controlled and has high resolution; the focal length span is large, and the field angle span is large; the infrared confocal property is good; the blue-violet side is optimized well, and the color reducibility of the image is improved.
Description
Technical Field
The utility model belongs to the technical field of the camera lens, specifically relate to a dual-purpose zoom lens of big light-passing day night for security protection control.
Background
With the continuous progress of the technology, in recent years, the optical imaging lens is also rapidly developed and widely applied to various fields such as smart phones, tablet computers, video conferences, vehicle-mounted monitoring, security monitoring and the like, so that the requirement on the optical imaging lens is higher and higher.
The zoom lens is a camera lens which can change focal length in a certain range, thereby obtaining different field angles, images with different sizes and different scene ranges. The zoom lens can change the shooting range by varying the focal length without changing the shooting distance, and thus is very convenient to use.
However, the zoom lens currently applied to the field of security monitoring has the following defects: the light transmission is small, the low-light characteristic is poor, and a clear color image cannot be realized under the condition of poor light; the transfer function is not well controlled, the resolution is low, the image sharpness is poor, and the image is not uniform; the focal length span is small, the field angle span is small, and the switching flexibility is poor; the infrared confocal performance is poor, the defocusing amount is large when the visible infrared is switched, and a switching piece or an optical filter is required to compensate; the blue-violet phenomenon is serious and affects the imaging quality. Therefore, the existing zoom lens applied to the field of security monitoring needs to be improved urgently to meet the increasing requirements of consumers.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a big dual-purpose zoom of day night that leads to light is used for solving the technical problem that above-mentioned exists.
In order to achieve the above object, the utility model adopts the following technical scheme: a large-light-transmission day and night zoom lens sequentially comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a; the first lens element to the thirteenth lens element respectively comprise an object side surface facing the object side and allowing the imaging light to pass and an image side surface facing the image side and allowing the imaging light to pass;
the first lens element with negative refractive index has a convex object-side surface and a concave image-side surface; the second lens element with negative refractive index has a concave object-side surface and a concave image-side surface; the third lens element with positive refractive index has a convex object-side surface and a convex image-side surface; the first lens to the third lens form a focusing lens group;
the fourth lens element with positive refractive index has a convex object-side surface and a concave image-side surface; the fifth lens element with positive refractive index has a convex object-side surface and a convex image-side surface; the sixth lens element with negative refractive index has a concave object-side surface and a convex image-side surface; the seventh lens element with negative refractive index has a concave object-side surface and a concave image-side surface; the eighth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the ninth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the tenth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the eleventh lens element with negative refractive power has a concave object-side surface and a concave image-side surface; the fourth lens to the eleventh lens form a variable power lens group;
the twelfth lens element with a positive refractive index has a convex object-side surface and a convex image-side surface; the thirteenth lens element with a negative refractive index has a concave object-side surface and a concave image-side surface; the twelfth lens and the thirteenth lens form a fixed lens group;
the second lens and the third lens are mutually glued, and the object-side surface and the image-side surface of the fourth lens are both aspheric surfaces; the zoom lens has only the thirteen lenses with the refractive index.
Further, the zoom lens further satisfies: vd2-vd3>30, where vd2 and vd3 are the abbe numbers of the second and third lenses, respectively.
Further, the object-side surface and the image-side surface of the fourth lens are both 14-order even-order aspheric surfaces.
Further, the zoom lens further satisfies: nd3>1.9, nd8>1.9, nd11>1.9, where nd3, nd8 and nd11 are refractive indices of the third lens, the eighth lens and the eleventh lens, respectively.
Further, the zoom lens further satisfies: vd2>60, vd4>60, vd5>60, vd9>60, wherein vd2, vd4, vd5 and vd9 are the abbe numbers of the second lens, the fourth lens, the fifth lens and the ninth lens, respectively.
Further, the fifth lens and the sixth lens are cemented with each other.
Further, the tenth lens and the eleventh lens are cemented to each other.
Further, the twelfth lens and the thirteenth lens are cemented to each other.
The utility model has the advantages of:
the utility model adopts thirteen lens, and through the arrangement design of the refractive index and the surface type of each lens, the lens has the advantages of large light transmission and good low-light property, and can realize clear color images under the condition of poor light; the transfer function is well controlled, high resolution and resolution are achieved, the image sharpness is high, and the images are uniform; the focal length span is large, the field angle span is large, and the switching flexibility is strong; the infrared confocal performance is good, and the defocusing amount is small (can be less than 3 mu m) when the visible infrared is switched in a wide-angle mode; the blue-violet side is optimized well, and the color reducibility of the image is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.
Fig. 1 is a schematic structural view of a first embodiment of the present invention at a shortest focal length;
fig. 2 is a schematic structural view of the first embodiment of the present invention at the longest focal length;
fig. 3 is a graph of MTF of 0.436-0.650 μm in visible light at the shortest focal length according to the first embodiment of the present invention;
fig. 4 is a defocus graph of 0.436-0.650 μm visible light at the shortest focal length according to the first embodiment of the present invention;
fig. 5 is an MTF graph of infrared 850nm at the shortest focal length according to the first embodiment of the present invention;
fig. 6 is a defocus graph of 850nm infrared rays at the shortest focal length according to the first embodiment of the present invention;
fig. 7 is a graph of lateral chromatic aberration at the shortest focal length according to the first embodiment of the present invention;
fig. 8 is a schematic view of longitudinal aberration at the shortest focal length according to the first embodiment of the present invention;
fig. 9 is a graph of MTF of 0.436-0.650 μm in visible light at the longest focal length according to the first embodiment of the present invention;
fig. 10 is a defocus graph of 0.436-0.650 μm visible light at the longest focal length according to the first embodiment of the present invention;
fig. 11 is an MTF graph of infrared 850nm at the longest focal length according to the first embodiment of the present invention;
fig. 12 is a defocus graph of 850nm infrared rays at the longest focal length according to the first embodiment of the present invention;
fig. 13 is a graph of lateral chromatic aberration at the longest focal length according to the first embodiment of the present invention;
fig. 14 is a diagram illustrating longitudinal aberrations at the longest focal length according to the first embodiment of the present invention;
fig. 15 is a schematic structural view of the second embodiment of the present invention at the shortest focal length;
fig. 16 is a schematic structural view of the second embodiment of the present invention at the longest focal length;
fig. 17 is an MTF graph of 0.436 to 0.650 μm in visible light at the shortest focal length according to embodiment two of the present invention;
fig. 18 is a defocus graph of 0.436-0.650 μm visible light at the shortest focal length according to the second embodiment of the present invention;
fig. 19 is an MTF graph of infrared 850nm at the shortest focal length according to the second embodiment of the present invention;
fig. 20 is a defocus graph of 850nm infrared rays at the shortest focal length according to the second embodiment of the present invention;
fig. 21 is a lateral chromatic aberration curve diagram of the second embodiment of the present invention at the shortest focal length;
fig. 22 is a schematic view of longitudinal aberration at the shortest focal length according to the second embodiment of the present invention;
fig. 23 is an MTF graph of 0.436 to 0.650 μm in visible light at the longest focal length according to embodiment two of the present invention;
fig. 24 is a defocus graph of 0.436-0.650 μm visible light at the longest focal length according to the second embodiment of the present invention;
fig. 25 is an MTF graph of infrared 850nm at the longest focal length according to the second embodiment of the present invention;
fig. 26 is a defocus graph of 850nm infrared rays at the longest focal length according to the second embodiment of the present invention;
fig. 27 is a lateral chromatic aberration curve diagram of the second embodiment of the present invention at the longest focal length;
fig. 28 is a schematic view of longitudinal aberration at the longest focal length according to the second embodiment of the present invention;
fig. 29 is a schematic structural view of the third embodiment of the present invention at the shortest focal length;
fig. 30 is a schematic structural view of the third embodiment of the present invention at the longest focal length;
fig. 31 is an MTF graph of 0.436 to 0.650 μm in visible light at the shortest focal length according to the third embodiment of the present invention;
fig. 32 is a defocus graph of 0.436-0.650 μm in visible light at the shortest focal length according to the third embodiment of the present invention;
fig. 33 is an MTF graph of infrared 850nm at the shortest focal length according to the third embodiment of the present invention;
fig. 34 is a defocus graph of 850nm infrared rays at the shortest focal length according to the third embodiment of the present invention;
fig. 35 is a lateral chromatic aberration curve diagram of the third embodiment of the present invention at the shortest focal length;
fig. 36 is a schematic view of longitudinal aberration at the shortest focal length according to the third embodiment of the present invention;
fig. 37 is an MTF graph of 0.436 to 0.650 μm in visible light at the longest focal length according to the third embodiment of the present invention;
fig. 38 is a defocus graph of 0.436-0.650 μm visible light at the longest focal length according to the third embodiment of the present invention;
fig. 39 is an MTF graph of infrared 850nm at the longest focal length according to the third embodiment of the present invention;
fig. 40 is a defocus graph of 850nm infrared rays at the longest focal length according to the third embodiment of the present invention;
fig. 41 is a lateral chromatic aberration curve diagram of the third embodiment of the present invention at the longest focal length;
fig. 42 is a diagram illustrating longitudinal aberrations at the longest focal length according to the third embodiment of the present invention;
fig. 43 is a schematic structural view of the fourth embodiment of the present invention at the shortest focal length;
fig. 44 is a schematic structural view of the fourth embodiment of the present invention at the longest focal length;
fig. 45 is an MTF graph of 0.436 to 0.650 μm in visible light at the shortest focal length according to embodiment four of the present invention;
fig. 46 is a defocus graph of 0.436-0.650 μm in visible light at the shortest focal length according to the fourth embodiment of the present invention;
fig. 47 is an MTF graph of infrared 850nm at the shortest focal length according to the fourth embodiment of the present invention;
fig. 48 is a defocus graph of 850nm infrared rays at the shortest focal length according to the fourth embodiment of the present invention;
fig. 49 is a graph of lateral chromatic aberration at the shortest focal length according to the fourth embodiment of the present invention;
fig. 50 is a schematic view of longitudinal aberration at the shortest focal length according to the fourth embodiment of the present invention;
fig. 51 is an MTF graph of 0.436 to 0.650 μm in visible light at the longest focal length according to embodiment four of the present invention;
fig. 52 is a defocus graph of 0.436-0.650 μm visible light at the longest focal length according to the fourth embodiment of the present invention;
fig. 53 is an MTF graph of infrared 850nm at the longest focal length according to the fourth embodiment of the present invention;
fig. 54 is a defocus graph of 850nm infrared rays at the longest focal length according to the fourth embodiment of the present invention;
fig. 55 is a graph of lateral chromatic aberration at the longest focal length according to the fourth embodiment of the present invention;
fig. 56 is a diagram illustrating longitudinal aberrations at the longest focal length according to the fourth embodiment of the present invention.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention
The present invention will now be further described with reference to the accompanying drawings and detailed description.
The term "a lens element having positive refractive index (or negative refractive index)" means that the paraxial refractive index of the lens element calculated by Gaussian optics theory is positive (or negative). The term "object-side (or image-side) of a lens" is defined as the specific range of imaging light rays passing through the lens surface. The determination of the surface shape of the lens can be performed by the judgment method of a person skilled in the art, i.e., by the sign of the curvature radius (abbreviated as R value). The R value may be commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in lens data sheets (lens data sheets) of optical design software. When the R value is positive, the object side is judged to be a convex surface; and when the R value is negative, judging that the object side surface is a concave surface. On the contrary, regarding the image side surface, when the R value is positive, the image side surface is judged to be a concave surface; when the R value is negative, the image side surface is judged to be convex.
The utility model provides a large-light-transmission zoom lens for day and night use, which sequentially comprises a first lens, a third lens, a diaphragm, a fourth lens, a thirteenth lens and a lens from an object side to an image side along an optical axis; the first lens element to the thirteenth lens element each include an object-side surface facing the object side and passing the image light and an image-side surface facing the image side and passing the image light.
The first lens element with negative refractive index has a convex object-side surface and a concave image-side surface; the second lens element with negative refractive index has a concave object-side surface and a concave image-side surface; the third lens element with positive refractive index has a convex object-side surface and a convex image-side surface; the first to third lenses constitute a focusing lens group.
The fourth lens element with positive refractive index has a convex object-side surface and a concave image-side surface; the fifth lens element with positive refractive index has a convex object-side surface and a convex image-side surface; the sixth lens element with negative refractive index has a concave object-side surface and a convex image-side surface; the seventh lens element with negative refractive index has a concave object-side surface and a concave image-side surface; the eighth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the ninth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the tenth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the eleventh lens element with negative refractive power has a concave object-side surface and a concave image-side surface; the fourth lens to the eleventh lens constitute a variable power lens group.
The twelfth lens element with a positive refractive index has a convex object-side surface and a convex image-side surface; the thirteenth lens element with a negative refractive index has a concave object-side surface and a concave image-side surface; the twelfth lens and the thirteenth lens constitute a fixed lens group.
The second lens and the third lens are mutually glued, and the object-side surface and the image-side surface of the fourth lens are both aspheric surfaces; the zoom lens has only the thirteen lenses with the refractive index.
The utility model adopts thirteen lens, and through the arrangement design of the refractive index and the surface type of each lens, the lens has the advantages of large light transmission and good low-light property, and can realize clear color images under the condition of poor light; the transfer function is well controlled, high resolution and resolution are achieved, the image sharpness is high, and the images are uniform; the focal length span is large, the field angle span is large, and the switching flexibility is strong; the infrared confocal performance is good, and the defocusing amount is small (can be less than 3 mu m) when the visible infrared is switched in a wide-angle mode; blue purple limit is optimized, improves the advantage of image color reducibility, simultaneously, the utility model discloses a three components design of zooming, the process of zooming is like matter stability, and structural design is succinct.
Preferably, the zoom lens further satisfies: vd2-vd3>30, where vd2 and vd3 are the abbe numbers of the second lens and the third lens, respectively, which is beneficial for correcting chromatic aberration.
Preferably, the object-side surface and the image-side surface of the fourth lens are both 14-order even-order aspheric surfaces, which is beneficial to correcting second-order spectrum and high-order aberration and is beneficial to lens structure design.
Preferably, the zoom lens further satisfies: nd3>1.9, nd8>1.9, nd11>1.9, wherein nd3, nd8 and nd11 are refractive indexes of the third lens, the eighth lens and the eleventh lens respectively, and an optical structure can be optimized relatively well.
Preferably, the zoom lens further satisfies: vd2>60, vd4>60, vd5>60 and vd9>60, wherein vd2, vd4, vd5 and vd9 are dispersion coefficients of the second lens, the fourth lens, the fifth lens and the ninth lens respectively, so that chromatic dispersion of light is reduced, and chromatic aberration is optimized.
Preferably, the fifth lens and the sixth lens are mutually glued, chromatic aberration is further corrected, and day and night confocality is improved.
Preferably, the tenth lens and the eleventh lens are mutually glued, chromatic aberration is further corrected, and day and night confocality is improved.
Preferably, the twelfth lens and the thirteenth lens are mutually glued, chromatic aberration is further corrected, and day and night confocality is improved.
The zoom lens of the present invention will be described in detail with specific embodiments.
Implement one
As shown in fig. 1 and 2, a large-pass day-night zoom lens includes, in order along an optical axis I, a first lens 1 to a third lens 3, a stop 140, a fourth lens 4 to a thirteenth lens 130, a protective glass 150, and an image plane 160 from an object side a1 to an image side a 2; the first lens element 1 to the thirteenth lens element 130 each include an object-side surface facing the object side a1 and passing the image light, and an image-side surface facing the image side a2 and passing the image light.
The first lens element 1 has a negative refractive index, the object-side surface 11 of the first lens element 1 is a convex surface, and the image-side surface 12 of the first lens element 1 is a concave surface; the second lens element 2 has a negative refractive index, the object-side surface 21 of the second lens element 2 is concave, and the image-side surface 22 of the second lens element 2 is concave; the third lens element 3 with positive refractive index has a convex object-side surface 31 of the third lens element 3 and a convex image-side surface 32 of the third lens element 3; the first to third lenses 1 to 3 constitute a focusing lens group movable back and forth along the optical axis I with respect to the stop 130.
The fourth lens element 4 with positive refractive index has a convex object-side surface 41 of the fourth lens element 4 and a concave image-side surface 42 of the fourth lens element 4; the fifth lens element 5 with positive refractive index has a convex object-side surface 51 of the fifth lens element 5 and a convex image-side surface 52 of the fifth lens element 5; the sixth lens element 6 with negative refractive index has a concave object-side surface 61 of the sixth lens element 6 and a convex image-side surface 62 of the sixth lens element 6; the seventh lens element 7 has a negative refractive index, and an object-side surface 71 of the seventh lens element 7 is concave and an image-side surface 72 of the seventh lens element 7 is concave; the eighth lens element 8 with positive refractive index has a convex object-side surface 81 of the eighth lens element 8 and a convex image-side surface 82 of the eighth lens element 8; the ninth lens element 9 with positive refractive power has a convex object-side surface 91 of the ninth lens element 9 and a convex image-side surface 92 of the ninth lens element 9; the tenth lens element 100 with positive refractive power has a convex object-side surface 101 of the tenth lens element 100 and a convex image-side surface 101 of the tenth lens element 100; the eleventh lens element 110 with negative refractive power has a concave object-side surface 111 of the eleventh lens element 110 and a concave image-side surface of the eleventh lens element 110; the fourth lens 4 to the eleventh lens 110 constitute a variable power lens group that can move back and forth along the optical axis I with respect to the stop 130.
The twelfth lens element 120 with a positive refractive index has a convex object-side surface 121 of the twelfth lens element 120 and a convex image-side surface 122 of the twelfth lens element 120; the thirteenth lens element 130 has a negative refractive index, the object-side surface 131 of the thirteenth lens element 130 is concave, and the image-side surface 132 of the thirteenth lens element 130 is concave; the twelfth lens 120 to the thirteenth lens 130 constitute a fixed lens group.
In this embodiment, the image-side surface 22 of the second lens element 2 and the object-side surface 31 of the third lens element 3 are cemented to each other, the image-side surface 52 of the fifth lens element 5 and the object-side surface 61 of the sixth lens element 6 are cemented to each other, the image-side surface 102 of the tenth lens element 100 and the object-side surface 111 of the eleventh lens element 110 are cemented to each other, and the image-side surface 122 of the twelfth lens element 120 and the object-side surface 131 of the thirteenth lens element 130 are cemented to each other, so as to better optimize the correction of chromatic aberration and the day-night confocality.
Of course, in other embodiments, the fifth lens 5 and the sixth lens 6, the tenth lens 100 and the eleventh lens 110, and the twelfth lens 120 and the thirteenth lens 130 may not be cemented together, and the second lens 5 and the sixth lens 6 may be cemented together, or the tenth lens 100 and the eleventh lens 110 may be cemented together, or the twelfth lens 120 and the thirteenth lens 130 may be cemented together, or any two sets of cemented structures may be cemented together.
In this embodiment, the object-side surface 41 and the image-side surface 42 of the fourth lens element 4 are both 14-order even-order aspheric surfaces.
In the present embodiment, the first lens 1 to the thirteenth lens 130 are made of a glass material, but not limited thereto.
Detailed optical data at the shortest focal length (wide angle) of this embodiment are shown in table 1-1.
TABLE 1-1 detailed optical data at shortest focal length of example one
Detailed optical data at the longest focal length (tele) of this embodiment are shown in tables 1-2.
TABLE 1-2 detailed optical data at longest focal length of example one
In this embodiment, the object-side surface 41 and the image-side surface 42 are defined by the following aspheric curve formula:
wherein:
z: depth of the aspheric surface (the vertical distance between a point on the aspheric surface that is y from the optical axis and a tangent plane tangent to the vertex on the optical axis of the aspheric surface);
c: curvature of aspheric vertex (the vertex curvature);
k: cone coefficient (Conic Constant);
rn: normalized radius (normalysis radius (NRADIUS));
u：r/rn；
am: mth order QconCoefficient (is the m)thQconcoefficient)；
Qm con: mth order QconPolynomial (the m)thQconpolynomial)；
For details of parameters of each aspheric surface, please refer to the following table:
please refer to fig. 3, fig. 5, fig. 9 and fig. 11 for the resolution of the present embodiment, which shows that the transfer function is well controlled and the resolution is high, under the visible light environment, the MTF value of 180lp/mm spatial frequency is greater than 0.3 at wide angle, and the MTF value of 180lp/mm spatial frequency is greater than 0.12 at telephoto; under the infrared environment and under the spatial frequency of 180lp/mm, MTF values are all larger than 0.1, and shooting noise is less; as shown in fig. 4, 6, 10 and 12, the confocal performance of visible light and infrared light is good, the defocusing amount during visible and infrared switching is less than 3 μm at a wide angle, and the defocusing amount during visible and infrared switching is less than 10 μm at a telephoto; the transverse chromatic aberration is shown in detail in fig. 7 and fig. 13, and it can be seen that the transverse chromatic aberration is less than +/-0.01 mm; the longitudinal aberration diagrams are shown in detail in fig. 8 and 14, and it can be seen that the longitudinal chromatic aberration is small.
In the specific embodiment, the focal length f of the zoom lens is 4-10mm, the aperture value FNO is 1.30-1.85, the distance TT L w from the object-side surface 11 of the first lens 1 to the imaging surface 160 on the optical axis I is 66.62mm at wide angle, the distance TT L t from the object-side surface 11 of the first lens 1 to the imaging surface 160 on the optical axis I is 45.45mm at telephoto angle, and the field angle FOV is 146-53 °.
Carry out two
As shown in fig. 15 and 16, in this embodiment, the surface-type convexo-concave and the refractive index of each lens element are the same as those of the first embodiment, and only the optical parameters such as the curvature radius of the surface of each lens element and the thickness of the lens element are different.
Detailed optical data at the shortest focal length (wide angle) of this embodiment are shown in table 2-1.
TABLE 2-1 detailed optical data at shortest focal Length for example two
Detailed optical data at the longest focal length (tele) of this embodiment are shown in table 2-2.
TABLE 2-2 detailed optical data at longest focal Length for example two
| Surface of | Type (B) | Caliber/mm | Radius of curvature/mm | Thickness/mm | Material of | Refractive index | Coefficient of dispersion | Focal length/mm |
| - | Shot object surface | Infinity | Infinity | |||||
| 11 | First lens | 28.103 | 500.000 | 1.567 | H-LAF50B | 1.773 | 49.613 | -15.582 |
| 12 | 19.358 | 11.781 | 7.454 | |||||
| 21 | Second lens | 18.699 | -35.781 | 1.124 | H-K9L | 1.517 | 64.212 | -22.416 |
| 22 | 17.867 | 17.388 | 0 | |||||
| 31 | Third lens | 17.867 | 17.388 | 3.009 | TAFD55 | 2.001 | 29.135 | 22.522 |
| 32 | 17.427 | 69.000 | 1.988 | |||||
| 140 | Diaphragm | 9.161 | Infinity | 0.709 | ||||
| 41 | Fourth lens | 10.836 | 16.972 | 1.503 | M-BACD5N | 1.589 | 61.251 | 153.202 |
| 42 | 11.285 | 20.201 | 0.975 | |||||
| 51 | Fifth lens element | 12.161 | 31.000 | 4.959 | H-ZPK5 | 1.593 | 68.525 | 10.773 |
| 52 | 12.410 | -7.614 | 0 | |||||
| 61 | Sixth lens element | 12.410 | -7.614 | 0.803 | H-ZF71 | 1.808 | 22.691 | -35.013 |
| 62 | 13.253 | -10.880 | 0.115 | |||||
| 71 | Seventh lens element | 13.013 | -13.487 | 0.828 | H-ZF71 | 1.808 | 22.691 | -11.058 |
| 72 | 14.185 | 27.860 | 0.567 | |||||
| 81 | Eighth lens element | 12.800 | 32.500 | 3.211 | H-ZF88 | 1.946 | 17.944 | 11.829 |
| 82 | 15.000 | -16.420 | 0.115 | |||||
| 91 | Ninth lens | 14.555 | 138.000 | 2.147 | H-ZPK5 | 1.593 | 68.525 | 51.091 |
| 92 | 14.242 | -38.698 | 0.232 | |||||
| 101 | Tenth lens | 11.200 | 18.231 | 3.496 | H-LAK53B | 1.755 | 52.337 | 10.021 |
| 102 | 12.728 | -12.000 | 0 | |||||
| 111 | Eleventh lens | 12.728 | -12.000 | 0.907 | H-ZLAF90 | 2.001 | 25.435 | -6.993 |
| 112 | 11.370 | 17.865 | 6.861 | |||||
| 121 | Twelfth lens element | 11.318 | 16.353 | 2.846 | H-ZLAF50E | 1.804 | 46.568 | 12.223 |
| 122 | 11.318 | -23.000 | 0 | |||||
| 131 | Thirteenth lens | 11.318 | -23.000 | 0.849 | H-ZF2 | 1.673 | 32.179 | -13.912 |
| 132 | 9.914 | 16.198 | 1.500 | |||||
| 150 | Cover glass | 9.239 | Infinity | 0.500 | H-K9L | 1.517 | 64.212 | Infinity |
| - | 9.223 | Infinity | 4.651 | |||||
| 160 | Image plane | 9.017 | Infinity |
For the detailed data of the parameters of each aspheric surface of this embodiment, refer to the following table:
please refer to fig. 17, fig. 19, fig. 23 and fig. 25 for the resolution of the present embodiment, which shows that the transfer function is well controlled and the resolution is high, and under the visible light environment, the MTF value of 180lp/mm spatial frequency is greater than 0.3 at wide angle and greater than 0.12 at long focus; under the infrared environment and under the spatial frequency of 180lp/mm, MTF values are all larger than 0.1, and shooting noise is less; as shown in fig. 18, 20, 24 and 26, the confocal performance of visible light and infrared light is good, and the defocusing amount during visible and infrared switching is less than 3 μm at a wide angle and less than 10 μm at visible and infrared switching; the transverse chromatic aberration is shown in detail in fig. 21 and 27, and it can be seen that the transverse chromatic aberration is less than ± 0.01 mm; the longitudinal aberration diagrams are shown in detail in fig. 22 and 28, and it can be seen that the longitudinal chromatic aberration is small.
In the specific embodiment, f is 4-10mm, FNO is 1.30-1.85, TT L w is 66.66mm, TT L t is 52.91mm, and FOV is 146-53 degrees.
Implementation III
As shown in fig. 29 and 30, the lens elements of this embodiment have the same surface type convexo-concave and refractive index as those of the first embodiment, and only the optical parameters such as the curvature radius of the surface of each lens element and the thickness of the lens element are different.
Detailed optical data at the shortest focal length (wide angle) of this embodiment are shown in table 3-1.
TABLE 3-1 detailed optical data at shortest focal length for example III
The detailed optical data at the longest focal length (tele) of this embodiment is shown in table 3-2.
TABLE 3-2 detailed optical data at longest focal length for example III
For the detailed data of the parameters of each aspheric surface of this embodiment, refer to the following table:
please refer to fig. 31, 33, 37 and 39 for the resolution of the present embodiment, which shows that the transfer function is well controlled and the resolution is high, under the visible light environment, the MTF value of 180lp/mm spatial frequency is greater than 0.3 at wide angle, and the MTF value of 180lp/mm spatial frequency is greater than 0.12 at telephoto; under the infrared environment and under the spatial frequency of 180lp/mm, MTF values are all larger than 0.1, and shooting noise is less; as shown in fig. 32, 34, 38 and 40, the confocal performance of visible light and infrared light is good, and the defocusing amount at the time of visible light and infrared switching is less than 3 μm at a wide angle and less than 10 μm at the time of visible light and infrared switching; the transverse chromatic aberration is shown in detail in fig. 35 and fig. 41, and it can be seen that the transverse chromatic aberration is less than ± 0.01 mm; the longitudinal aberration diagrams are shown in fig. 36 and 42 in detail, and it can be seen that the longitudinal chromatic aberration is small.
In the specific embodiment, f is 4-10mm, FNO is 1.30-1.85, TT L w is 66.64mm, TT L t is 52.68mm, and FOV is 146-53 degrees.
Practice four
As shown in fig. 43 and 44, the lens of this embodiment has the same surface type convexo-concave and refractive index as the lens of the first embodiment, and only the optical parameters such as the curvature radius of the surface of each lens and the thickness of the lens are different.
Detailed optical data at the shortest focal length (wide angle) of this embodiment is shown in table 4-1.
TABLE 4-1 detailed optical data at shortest focal length for example four
The detailed optical data at the longest focal length (tele) of this embodiment is shown in table 4-2.
TABLE 4-2 detailed optical data at longest focal length for example four
For the detailed data of the parameters of each aspheric surface of this embodiment, refer to the following table:
please refer to fig. 45, 47, 51 and 53 for the resolution of the present embodiment, which shows that the transfer function is well controlled and the resolution is high, under the visible light environment, the MTF value of 180lp/mm spatial frequency is greater than 0.3 at wide angle, and the MTF value of 180lp/mm spatial frequency is greater than 0.12 at telephoto; under the infrared environment and under the spatial frequency of 180lp/mm, MTF values are all larger than 0.1, and shooting noise is less; as shown in fig. 46, 48, 52 and 54, the confocal performance of visible light and infrared light is good, and the defocusing amount at the time of visible light and infrared switching is less than 3 μm at a wide angle and less than 10 μm at the time of visible light and infrared switching; the transverse chromatic aberration is shown in detail in fig. 49 and fig. 55, and it can be seen that the transverse chromatic aberration is less than +/-0.01 mm; the longitudinal aberration diagrams are shown in detail in fig. 50 and 56, and it can be seen that the longitudinal chromatic aberration is small.
In the specific embodiment, f is 4-10mm, FNO is 1.30-1.85, TT L w is 66.48mm, TT L t is 52.32mm, and FOV is 146-53 degrees.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A big dual-purpose zoom of light day night that leads to, its characterized in that: the lens assembly comprises first to third lenses, a diaphragm, and fourth to thirteenth lenses in sequence from an object side to an image side along an optical axis; the first lens element to the thirteenth lens element respectively comprise an object side surface facing the object side and allowing the imaging light to pass and an image side surface facing the image side and allowing the imaging light to pass;
the first lens element with negative refractive index has a convex object-side surface and a concave image-side surface; the second lens element with negative refractive index has a concave object-side surface and a concave image-side surface; the third lens element with positive refractive index has a convex object-side surface and a convex image-side surface; the first lens to the third lens form a focusing lens group;
the fourth lens element with positive refractive index has a convex object-side surface and a concave image-side surface; the fifth lens element with positive refractive index has a convex object-side surface and a convex image-side surface; the sixth lens element with negative refractive index has a concave object-side surface and a convex image-side surface; the seventh lens element with negative refractive index has a concave object-side surface and a concave image-side surface; the eighth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the ninth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the tenth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the eleventh lens element with negative refractive power has a concave object-side surface and a concave image-side surface; the fourth lens to the eleventh lens form a variable power lens group;
the twelfth lens element with a positive refractive index has a convex object-side surface and a convex image-side surface; the thirteenth lens element with a negative refractive index has a concave object-side surface and a concave image-side surface; the twelfth lens and the thirteenth lens form a fixed lens group;
the second lens and the third lens are mutually glued, and the object-side surface and the image-side surface of the fourth lens are both aspheric surfaces; the zoom lens has only the thirteen lenses with the refractive index.
2. A large-pass day-night zoom lens according to claim 1, further comprising: vd2-vd3>30, where vd2 and vd3 are the abbe numbers of the second and third lenses, respectively.
3. A large-pass day-night zoom lens according to claim 1, wherein: the object-side surface and the image-side surface of the fourth lens are both 14-order even-order aspheric surfaces.
4. A large-pass day-night zoom lens according to claim 1, further comprising: nd3>1.9, nd8>1.9, nd11>1.9, where nd3, nd8 and nd11 are refractive indices of the third lens, the eighth lens and the eleventh lens, respectively.
5. A large-pass day-night zoom lens according to claim 1, further comprising: vd2>60, vd4>60, vd5>60, vd9>60, wherein vd2, vd4, vd5 and vd9 are the abbe numbers of the second lens, the fourth lens, the fifth lens and the ninth lens, respectively.
6. A large-pass day-night zoom lens according to claim 1, wherein: the fifth lens and the sixth lens are cemented with each other.
7. A large-pass day-night zoom lens according to claim 1, wherein: the tenth lens and the eleventh lens are cemented to each other.
8. A large-pass day-night zoom lens according to claim 1, wherein: the twelfth lens and the thirteenth lens are cemented to each other.
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| CN202020136763.XU CN211180378U (en) | 2020-01-21 | 2020-01-21 | Large-light-transmission zoom lens capable of being used in day and night |
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| CN202020136763.XU CN211180378U (en) | 2020-01-21 | 2020-01-21 | Large-light-transmission zoom lens capable of being used in day and night |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111142247A (en) * | 2020-01-21 | 2020-05-12 | 厦门力鼎光电股份有限公司 | Large-light-transmission zoom lens capable of being used in day and night |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111142247A (en) * | 2020-01-21 | 2020-05-12 | 厦门力鼎光电股份有限公司 | Large-light-transmission zoom lens capable of being used in day and night |
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