CN220526089U - Unmanned aerial vehicle camera lens - Google Patents
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- CN220526089U CN220526089U CN202321951492.3U CN202321951492U CN220526089U CN 220526089 U CN220526089 U CN 220526089U CN 202321951492 U CN202321951492 U CN 202321951492U CN 220526089 U CN220526089 U CN 220526089U
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Abstract
The utility model relates to an unmanned aerial vehicle lens, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens along the direction from an object side to an image side, wherein the first lens is a convex-concave lens with positive focal power; the second lens is a convex-concave lens with negative focal power; the third lens is a convex-concave lens with negative focal power; the fourth lens is a lens with positive focal power and a convex image side surface; the fifth lens is a concave-convex lens with negative focal power; the sixth lens is a convex-concave lens with positive focal power; the seventh lens is a concave lens with negative focal power; the maximum image height IH of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens meet the following conditions: IH/TTL is more than or equal to 0.8 and less than or equal to 1.1.
Description
Technical Field
The utility model relates to the technical field of optics, in particular to an unmanned aerial vehicle lens.
Background
With the development of the conventional image processing algorithm and AI technology, in recent years, the types of fixed focus lenses have become more diversified, and are widely used in various fields such as unmanned aerial vehicles.
The existing unmanned aerial vehicle lens at least has the following defects:
1. the focal length of some existing lenses is generally smaller, so that the target surface of a matched chip is not large enough;
2. the wavelength design range of some existing lenses is short, so that the existing lenses are difficult to use at night;
3. some existing lenses are low in resolution, so that the resolution of pictures shot by the existing lenses is low, and the imaging quality of the unmanned aerial vehicle camera lens is seriously affected;
4. some existing lenses have poor light permeability and cannot meet shooting use requirements in dark environments at night or in overcast and rainy days;
5. some existing lenses are more matched with glass lenses, so that the requirements of light weight and low cost are not met;
6. the existing lenses have large temperature drift, and imaging quality can be influenced when temperature disturbance is too large.
Disclosure of Invention
In view of the above, the utility model provides an unmanned aerial vehicle lens, which solves the problems that the current unmanned aerial vehicle lens cannot achieve the effects of small volume, light weight, low cost, good photographing effect at night, high definition, balanced chromatic aberration, reduced ghost images, large target surface and large aperture, and is not suitable for unmanned aerial vehicle carrying and photographing under different light and temperature conditions.
The unmanned aerial vehicle lens provided by the embodiment of the utility model sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens along the direction from an object side to an image side of an optical axis, wherein the first lens is a convex-concave lens with positive focal power; the second lens is a convex-concave lens with negative focal power; the third lens is a convex-concave lens with negative focal power; the fourth lens is a lens with positive focal power and a convex image side surface; the fifth lens is a concave-convex lens with negative focal power; the sixth lens is a convex-concave lens with positive focal power; the seventh lens is a concave lens with negative focal power; the maximum image height IH of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens meet the following conditions: IH/TTL is more than or equal to 0.8 and less than or equal to 1.1.
Preferably, the effective focal length f1 of the first lens and the total effective focal length f of the unmanned aerial vehicle lens satisfy: f1/f is more than or equal to 0.9 and less than or equal to 1.2.
Preferably, the effective focal length f2 of the second lens and the total effective focal length f of the unmanned aerial vehicle lens satisfy: -9.5.ltoreq.f2/f.ltoreq.5.2.
Preferably, the combined effective focal length f12 of the first lens and the second lens and the total effective focal length f of the unmanned aerial vehicle lens satisfy: f12/f is more than or equal to 0.9 and less than or equal to 1.4.
Preferably, the effective focal length f3 of the third lens and the total effective focal length f of the unmanned aerial vehicle lens satisfy: -3.5.ltoreq.f3/f.ltoreq.2.4.
Preferably, the effective focal length f4 of the fourth lens and the total effective focal length f of the unmanned aerial vehicle lens satisfy: f4/f is more than or equal to 0.7 and less than or equal to 1.1.
Preferably, the effective focal length f5 of the fifth lens and the total effective focal length f of the unmanned aerial vehicle lens satisfy: -1.7.ltoreq.f5/f.ltoreq.0.9.
Preferably, the effective focal length f6 of the sixth lens and the total effective focal length f of the unmanned aerial vehicle lens satisfy: f6/f is more than or equal to 1.2 and less than or equal to 2.4.
Preferably, the effective focal length f7 of the seventh lens and the total effective focal length f of the unmanned aerial vehicle lens satisfy: -0.9.ltoreq.f7/f.ltoreq.0.7.
Preferably, the combined effective focal length f67 of the sixth lens and the seventh lens and the total effective focal length f of the unmanned aerial vehicle lens satisfy: -4.3.ltoreq.f67/f.ltoreq.1.2.
Preferably, the interval T45 between the fourth lens and the fifth lens, and the interval T23 between the second lens and the third lens satisfy: T45/T23 is more than or equal to 0.1 and less than or equal to 0.4.
Preferably, the back focal length BFL of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens satisfy: BFL/TTL is more than or equal to 0 and less than or equal to 0.2.
Preferably, the maximum light transmission full aperture D1 of the first lens and the maximum image height IH of the unmanned aerial vehicle lens satisfy: D1/IH is more than or equal to 0.6 and less than or equal to 0.8.
Preferably, the object-side surface curvature radius R11 of the first lens and the maximum light-transmitting full aperture D1 of the first lens satisfy: R11/D1 is more than or equal to 0.6 and less than or equal to 0.8.
Preferably, a diaphragm is located between the second lens and the third lens, and a length TH12 from an object side surface of the first lens to the diaphragm and a total length TTL of the unmanned aerial vehicle lens satisfy: TH12/TTL is more than or equal to 0 and less than or equal to 0.3.
Preferably, the object-side radius of curvature R21 of the second lens and the image-side radius of curvature R22 of the second lens satisfy: (R21-R22)/(R21+R22) is less than or equal to 0.1 and less than or equal to 0.6.
Preferably, the object-side radius of curvature R31 of the third lens and the image-side radius of curvature R32 of the third lens satisfy: and (R31-R32)/(R31+R32) is less than or equal to 0.2.
According to the unmanned aerial vehicle lens provided by the embodiment of the utility model, seven lenses are adopted, through the collocation of the focal power and the shape of each lens and the reasonable optical parameter setting, at least one of the beneficial effects of small volume (TTL is less than or equal to 20 mm), low cost, light weight (2G 5P), large aperture (FNO is less than or equal to 1.55), good night shooting effect, high definition (wavelength range 435-950 nm), large target surface (18.21 mm) and the like can be realized, and the unmanned aerial vehicle lens is suitable for unmanned aerial vehicle carrying and shooting under different light and temperature conditions, and meanwhile, the balanced chromatic aberration can be effectively optimized, and the ghost image is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic optical structure of a lens of an unmanned aerial vehicle according to a first embodiment of the present utility model;
fig. 2 is a schematic MTF diagram of a lens of an unmanned aerial vehicle according to a first embodiment of the present utility model;
fig. 3 is a schematic diagram of chromatic aberration of a lens of an unmanned aerial vehicle according to a first embodiment of the present utility model;
fig. 4 is a schematic optical structure of a lens of an unmanned aerial vehicle according to a second embodiment of the present utility model;
fig. 5 is a schematic MTF diagram of a lens of a drone according to a second embodiment of the present utility model;
fig. 6 is a schematic diagram of chromatic aberration of a lens of an unmanned aerial vehicle according to a second embodiment of the present utility model;
fig. 7 is a schematic optical structure of a lens of a unmanned aerial vehicle according to a third embodiment of the present utility model;
fig. 8 is a schematic MTF diagram of a lens of a drone according to a third embodiment of the present utility model;
fig. 9 is a schematic diagram of chromatic aberration of a lens of an unmanned aerial vehicle according to a third embodiment of the present utility model;
fig. 10 is a schematic optical structure of a lens of a unmanned aerial vehicle according to a fourth embodiment of the present utility model;
fig. 11 is a schematic MTF diagram of a lens of a unmanned aerial vehicle according to a fourth embodiment of the present utility model;
fig. 12 is a schematic diagram of chromatic aberration of a lens of an unmanned aerial vehicle according to a fourth embodiment of the present utility model;
fig. 13 is an optical structural diagram of a lens of a unmanned aerial vehicle according to a fifth embodiment of the present utility model;
fig. 14 is a schematic view of MTF of a lens of a unmanned aerial vehicle according to a fifth embodiment of the present utility model;
fig. 15 is a schematic diagram of chromatic aberration of a lens of an unmanned aerial vehicle according to a fifth embodiment of the present utility model;
fig. 16 is an optical structural diagram of a lens of a unmanned aerial vehicle according to a sixth embodiment of the present utility model;
fig. 17 is a schematic MTF diagram of a lens of a unmanned aerial vehicle according to a sixth embodiment of the present utility model;
fig. 18 is a schematic diagram of chromatic aberration of a lens of an unmanned aerial vehicle according to a sixth embodiment of the present utility model.
Detailed Description
The description of the embodiments of this specification should be taken in conjunction with the accompanying drawings, which are a complete description of the embodiments. In the drawings, the shape or thickness of the embodiments may be enlarged and indicated simply or conveniently. Furthermore, portions of the structures in the drawings will be described in terms of separate descriptions, and it should be noted that elements not shown or described in the drawings are in a form known to those of ordinary skill in the art.
Any references to directions and orientations in the description of the embodiments herein are for convenience only and should not be construed as limiting the scope of the utility model in any way. The following description of the preferred embodiments will refer to combinations of features, which may be present alone or in combination, and the utility model is not particularly limited to the preferred embodiments. The scope of the utility model is defined by the claims.
In the present utility model, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is referred to as the object side of the lens, and the surface of each lens closest to the imaging side is referred to as the image side of the lens.
As shown in fig. 1, 4, 7, 10, 13, and 16, the unmanned aerial vehicle lens according to the embodiment of the present utility model sequentially includes, along the direction from the object side to the IMAGE side along the optical axis, a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a panel CG, and an IMAGE plane IMAGE. The first lens L1 is a convex-concave lens having positive optical power. The second lens L2 is a convex-concave lens having negative optical power. The third lens L3 is a convex-concave lens having negative optical power. The fourth lens L4 is a lens having positive optical power and a convex image side surface. The fifth lens L5 is a meniscus lens having negative optical power. The sixth lens L6 is a convex-concave lens having positive optical power. The seventh lens L7 is a concave lens having negative optical power; the maximum image height IH of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens meet the following conditions: IH/TTL is more than or equal to 0.8 and less than or equal to 1.1. Therefore, the unmanned aerial vehicle lens of the embodiment can realize small volume, light weight, low cost, good night photographing effect and high definition, is suitable for unmanned aerial vehicle carrying and photographing under different light and temperature conditions, and simultaneously, controls the maximum image height IH and the total length TTL of the unmanned aerial vehicle lens in the above range, is favorable for controlling the maximum image circle size and the total length of an optical system, and is further favorable for realizing miniaturization of the lens.
The first lens L1 is in a meniscus shape with a convex surface facing the object space, has positive focal power, is favorable for collecting light to smoothly enter the optical system, and can effectively regulate and control the caliber of the optical system so as to realize the longitudinal miniaturization of the optical lens. The first lens L1 may be cemented with the second lens L2, thereby effectively correcting chromatic aberration.
The second lens L2 is a lens with negative focal power, and the image side surface is concave, so that light rays can be further collected, and the large-angle light rays enter the optical system as much as possible, and the illuminance of the optical system is effectively improved. The second lens L2 may be cemented with the first lens L1, thereby effectively correcting chromatic aberration.
The third lens L3 is a lens with negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface, so that light rays can be effectively dispersed, and the illumination can be improved while the size requirement of the image plane is met.
The fourth lens L4 is a lens with positive focal power, and the image side surface is convex and is matched with the fifth lens L5 to eliminate chromatic aberration, reduce spherical aberration, correct astigmatism and improve resolution.
The fifth lens L5 is a lens with negative focal power, the object side surface is concave, the image side surface is convex, and the fifth lens L5 is matched with the fourth lens L4, so that the chromatic aberration of the system can be effectively corrected, and a good balance effect is achieved on the high temperature and the low temperature of the optical system.
The sixth lens L6 is a positive focal power lens, the object side surface is convex, the image side surface is concave, the seventh lens L7 is matched with the negative focal power lens, the two lenses are matched with each other to correct aberration, imaging quality is improved, and meanwhile system tolerance sensitivity is reduced.
The object side surface of the paraxial region of the seventh lens L7 is concave, the image side surface is concave, and at least one or more reverse curves exist, so that light rays passing through the seventh lens L7 are lifted upwards and smoothly enter the image surface, and the realization of high illumination and a large target surface is facilitated.
In a preferred embodiment of the utility model, a diaphragm may also be included, which diaphragm may be located, for example, between the second lens and the third lens. It should be noted that the positions of the diaphragms disclosed herein are merely examples and are not limiting; in alternative embodiments, the diaphragm may be arranged in other positions as desired.
In a preferred embodiment of the present utility model, the first lens L1 and the second lens L2 are glass spherical lenses, and the third lens L3 to the seventh lens L7 are plastic aspherical lenses. Therefore, a 2G5P glass-plastic mixed framework is adopted, and the requirements of low cost and light weight design are met.
In a preferred embodiment of the present utility model, the effective focal length f1 of the first lens L1 and the total effective focal length f of the unmanned lens satisfy: f1/f is more than or equal to 0.9 and less than or equal to 1.2. Therefore, the method is beneficial to injecting the light rays with large angles into the optical system so as to realize a large target surface.
In a preferred embodiment of the utility model, the effective focal length f2 of the second lens L2 and the total effective focal length f of the drone lens satisfy: -9.5.ltoreq.f2/f.ltoreq.5.2. Therefore, by reasonably configuring the focal length of the second lens L2, more light can smoothly enter the optical system, chromatic aberration can be effectively corrected, and the resolution of the lens can be improved.
In a preferred embodiment of the present utility model, the combined effective focal length f12 of the first lens L1 and the second lens L2 and the total effective focal length f of the unmanned lens satisfy: f12/f is more than or equal to 0.9 and less than or equal to 1.4. Therefore, by reasonably configuring the focal lengths of the first lens L1 and the second lens L2, chromatic aberration is eliminated, spherical aberration is reduced, astigmatism is corrected, and resolution is improved.
In a preferred embodiment of the present utility model, the effective focal length f3 of the third lens L3 and the total effective focal length f of the unmanned lens satisfy: -3.5.ltoreq.f3/f.ltoreq.2.4. Therefore, the third lens L3 is a lens with negative focal power, so that light rays are effectively dispersed, and the illumination is improved while the requirement of the image plane size is met.
In a preferred embodiment of the present utility model, the effective focal length f4 of the fourth lens L4 and the total effective focal length f of the unmanned lens satisfy: f4/f is more than or equal to 0.7 and less than or equal to 1.1. Therefore, the fourth lens L4 is a positive focal power lens and is matched with the fifth lens L5 to eliminate chromatic aberration, reduce spherical aberration and improve resolution, and meanwhile, the high-low temperature effect of the balance system is achieved.
In a preferred embodiment of the present utility model, the effective focal length f5 of the fifth lens L5 and the total effective focal length f of the unmanned lens satisfy: -1.7.ltoreq.f5/f.ltoreq.0.9. Therefore, the effect of controlling the emergent angle of the main light is achieved, so that a high-illuminance large target surface is achieved, the maximum image height can reach 18.21mm, and the illuminance is more than or equal to 50%.
In a preferred embodiment of the present utility model, the effective focal length f6 of the sixth lens L6 and the total effective focal length f of the unmanned lens satisfy: f6/f is more than or equal to 1.2 and less than or equal to 2.4. Therefore, the sixth lens L6 is a positive focal power lens, the seventh lens L7 is a negative focal power lens, and the two lenses are matched for correcting aberration, so that imaging quality is improved;
in a preferred embodiment of the present utility model, the effective focal length f7 of the seventh lens L7 and the total effective focal length f of the unmanned lens satisfy: -0.9.ltoreq.f7/f.ltoreq.0.7. Therefore, aberration can be corrected, imaging quality is improved, and the relative illumination of the whole system is improved.
In a preferred embodiment of the present utility model, the combined effective focal length f67 of the sixth lens L6 and the seventh lens L7 and the total effective focal length f of the unmanned lens satisfy: -4.3.ltoreq.f67/f.ltoreq.1.2. Therefore, the light rays passing through the sixth lens L6 and the seventh lens L7 are lifted upwards and smoothly enter the image surface, and the high-illumination large target surface is realized.
In a preferred embodiment of the present utility model, the interval T45 between the fourth lens L4 and the fifth lens L5, the interval T23 between the second lens L2 and the third lens L3 satisfy: T45/T23 is more than or equal to 0.1 and less than or equal to 0.4. Therefore, the interval between the lenses is reasonably controlled, and the ghost images generated by the optical system are reduced.
In a preferred embodiment of the present utility model, the back focal length BFL of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens satisfy: BFL/TTL is more than or equal to 0 and less than or equal to 0.2. Therefore, the back focus and the total length of the optical system are controlled, and further miniaturization of the lens is facilitated.
In a preferred embodiment of the present utility model, the maximum light-transmitting full aperture D1 of the first lens L1 and the maximum image height IH of the unmanned aerial vehicle lens satisfy: D1/IH is more than or equal to 0.6 and less than or equal to 0.8. Thus, the entire aperture of the first lens L1 of the optical system is controlled, which is advantageous in achieving downsizing of the lens.
In a preferred embodiment of the present utility model, the object-side surface radius of curvature R11 of the first lens L1 and the maximum light-transmitting full aperture D1 of the first lens L1 satisfy: R11/D1 is more than or equal to 0.6 and less than or equal to 0.8. Therefore, the full caliber and the curvature radius of the first lens L1 of the optical system are controlled, and the miniaturization of the lens is facilitated.
In a preferred embodiment of the present utility model, the length TH12 from the object side surface of the first lens L1 to the stop STO and the total length TTL of the unmanned lens satisfy: TH12/TTL is more than or equal to 0 and less than or equal to 0.3. Therefore, the total length of the front group of the optical system is controlled, and the miniaturization of the lens is facilitated.
In a preferred embodiment of the present utility model, the object-side radius of curvature R21 of the second lens L2 and the image-side radius of curvature R22 of the second lens L2 satisfy: (R21-R22)/(R21+R22) is less than or equal to 0.1 and less than or equal to 0.6. Therefore, the curvature radius of the second lens L2 is effectively controlled, so that the light rays are smooth in trend, and the tolerance sensitivity of the system is reduced.
In a preferred embodiment of the present utility model, the object-side radius of curvature R31 of the third lens L3 and the image-side radius of curvature R32 of the third lens L3 satisfy: and (R31-R32)/(R31+R32) is less than or equal to 0.2. Therefore, the curvature radius of the third lens L3 is effectively controlled, so that the light rays are smooth in trend, and the tolerance sensitivity of the system is reduced.
According to the unmanned aerial vehicle lens provided by the embodiment of the utility model, seven lenses are adopted, through the collocation of the focal power and the shape of each lens and the reasonable optical parameter setting, at least one of the beneficial effects of small volume (TTL is less than or equal to 20 mm), low cost, light weight (2G 5P), large aperture (FNO is less than or equal to 1.55), good night shooting effect, high definition (wavelength range 435-950 nm), large target surface (18.21 mm) and the like can be realized, and the unmanned aerial vehicle lens is suitable for unmanned aerial vehicle carrying and shooting under different light and temperature conditions, and meanwhile, the balanced chromatic aberration can be effectively optimized, and the ghost image is reduced.
The unmanned aerial vehicle lens of the utility model is specifically described below in six embodiments with reference to the accompanying drawings and tables. In the following embodiments, the stop STO is denoted as one side and the IMAGE plane IMAGE is denoted as one side.
The parameters of the respective examples specifically satisfying the above conditional expression are shown in the following table 1:
TABLE 1
In embodiments of the present utility model, the aspheric lens of the unmanned aerial vehicle lens satisfies the following formula:
in the above formula, z is the axial distance from the curved surface to the vertex at the position with the height y perpendicular to the optical axis along the optical axis direction; c represents the curvature at the apex of the aspherical curved surface; k is a conic coefficient; a is that 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 The fourth order, sixth order, eighth order, tenth order, fourteenth order, sixteen order, respectively, are aspherical coefficients.
Example 1
Fig. 1 is a schematic optical structure diagram of a lens of an unmanned aerial vehicle according to a first embodiment of the present utility model.
In this embodiment:
the fourth lens L4 is a meniscus lens.
In the present embodiment, the radius of curvature R (mm), thickness d (mm), refractive index Nd, and abbe number Vd of each face of the unmanned aerial vehicle lens are referred to table 2:
| face number | Surface type | Radius of curvature R | Thickness d | Refractive index Nd | Abbe number Vd |
| 1 | Spherical surface | 7.507 | 3.38 | 1.57 | 71.3 |
| 2 | Spherical surface | 135.951 | 0.75 | 1.69 | 31.2 |
| 3 | Spherical surface | 49.960 | 0.37 | ||
| Stop | Spherical surface | infinity | 0.25 | ||
| 5 | Aspherical surface | 7.538 | 0.75 | 1.64 | 23.5 |
| 6 | Aspherical surface | 5.627 | 2.03 | ||
| 7 | Aspherical surface | -126.499 | 2.58 | 1.54 | 55.7 |
| 8 | Aspherical surface | -8.091 | 0.12 | ||
| 9 | Aspherical surface | -12.160 | 1.30 | 1.66 | 20.4 |
| 10 | Aspherical surface | -49.795 | 0.83 | ||
| 11 | Aspherical surface | 15.924 | 1.36 | 1.64 | 23.5 |
| 12 | Aspherical surface | 84.206 | 2.59 | ||
| 13 | Aspherical surface | -9.195 | 1.12 | 1.54 | 55.7 |
| 14 | Aspherical surface | 22.507 | 0.74 | ||
| 15 | Spherical surface | infinity | 1.15 | 1.52 | 64.2 |
| 16 | Spherical surface | infinity | 0.25 | ||
| IMAGE | Spherical surface | infinity | 0.00 |
TABLE 2
In this embodiment, the K value and aspherical coefficients of the lens of the unmanned aerial vehicle are shown in table 3:
TABLE 3 Table 3
With reference to fig. 1-3 and the foregoing tables 1-3, the unmanned aerial vehicle lens of this embodiment adopts seven lenses, and through the collocation of the focal power and the shape of each lens and reasonable optical parameter setting, at least one of the beneficial effects of small volume (TTL is less than or equal to 20 mm), low cost, light weight (2G 5P), large aperture (fno=1.53), good night shooting effect, high definition (wavelength range 435-950 nm), large target surface and the like can be realized, and the unmanned aerial vehicle lens is suitable for unmanned aerial vehicle carrying and shooting under different light and temperature conditions, and meanwhile, balance chromatic aberration can be effectively optimized, and ghost images can be reduced.
Example two
Fig. 4 is a schematic optical structure diagram of a lens of an unmanned aerial vehicle according to a second embodiment of the present utility model.
In this embodiment:
the fourth lens L4 is a convex lens.
In the present embodiment, the radius of curvature R (mm), thickness d (mm), refractive index Nd, and abbe number Vd of each face of the unmanned aerial vehicle lens are referred to table 4:
TABLE 4 Table 4
In this embodiment, the K value and aspherical coefficients of the lens of the unmanned aerial vehicle are shown in table 5:
| face number | K value | A4 | A6 | A8 | A10 | A12 | A14 |
| 5 | 0.00 | -1.49E-03 | -2.83E-05 | -7.67E-07 | 1.24E-07 | -3.12E-09 | -2.55E-11 |
| 6 | 0.00 | -1.75E-03 | -4.14E-05 | -1.94E-06 | 3.00E-07 | -1.39E-08 | 1.60E-10 |
| 7 | 0.00 | -2.36E-04 | -4.63E-05 | 3.17E-06 | -2.86E-07 | 1.39E-08 | -3.73E-10 |
| 8 | 0.00 | 9.11E-04 | -9.63E-05 | -1.79E-06 | 1.07E-07 | 4.93E-09 | -2.25E-10 |
| 9 | 0.00 | 9.82E-04 | -6.47E-05 | -7.81E-07 | -2.63E-08 | 2.04E-09 | 4.65E-11 |
| 10 | 0.00 | -1.41E-03 | 8.90E-05 | -5.00E-06 | 7.75E-08 | -6.11E-10 | 2.47E-11 |
| 11 | 0.00 | -1.81E-03 | 1.19E-05 | 1.41E-06 | -1.51E-07 | 4.69E-09 | -8.08E-11 |
| 12 | 0.00 | -9.04E-04 | -1.92E-05 | 1.60E-06 | -5.25E-08 | 3.77E-10 | 3.23E-12 |
| 13 | 0.00 | -3.17E-03 | 6.62E-05 | 2.96E-07 | -1.30E-08 | 7.03E-11 | 0.00E+00 |
| 14 | 0.00 | -2.37E-03 | 4.60E-05 | -8.13E-07 | 7.55E-09 | -2.83E-11 | 0.00E+00 |
TABLE 5
With reference to fig. 4-6 and the foregoing tables 1 and 4-5, the unmanned aerial vehicle lens of this embodiment adopts seven lenses, and through the collocation of the focal power and the shape of each lens and reasonable optical parameter setting, at least one of the beneficial effects of small volume (TTL less than or equal to 20 mm), low cost, light weight (2G 5P), large aperture (fno=1.54), good night shooting effect, high definition (wavelength range 435-950 nm), large target surface and the like can be realized, and the unmanned aerial vehicle lens is suitable for unmanned aerial vehicle carrying and shooting under different light and temperature conditions, and meanwhile, the balance chromatic aberration can be effectively optimized, and ghost images can be reduced.
Example III
Fig. 7 is a schematic optical structure diagram of a lens of an unmanned aerial vehicle according to a third embodiment of the present utility model.
In this embodiment:
the fourth lens L4 is a convex lens.
In the present embodiment, the radius of curvature R (mm), thickness d (mm), refractive index Nd, and abbe number Vd of each face of the unmanned aerial vehicle lens are referred to table 6:
TABLE 6
In this embodiment, the K value and aspherical coefficients of the lens of the unmanned aerial vehicle are shown in table 7:
| face number | K value | A4 | A6 | A8 | A10 | A12 | A14 |
| 5 | 0.00 | -1.50E-03 | -2.85E-05 | -6.99E-07 | 1.27E-07 | -3.30E-09 | -2.19E-11 |
| 6 | 0.00 | -1.73E-03 | -4.00E-05 | -1.99E-06 | 3.03E-07 | -1.30E-08 | 1.40E-10 |
| 7 | 0.00 | -2.00E-04 | -4.86E-05 | 3.17E-06 | -2.82E-07 | 1.35E-08 | -3.48E-10 |
| 8 | 0.00 | 9.71E-04 | -9.41E-05 | -1.67E-06 | 9.84E-08 | 4.31E-09 | -2.02E-10 |
| 9 | 0.00 | 1.04E-03 | -5.91E-05 | -7.07E-07 | -2.98E-08 | 2.02E-09 | 5.37E-11 |
| 10 | 0.00 | -1.37E-03 | 9.06E-05 | -4.95E-06 | 8.03E-08 | -5.87E-10 | 2.13E-11 |
| 11 | 0.00 | -1.71E-03 | 1.13E-05 | 1.27E-06 | -1.48E-07 | 4.75E-09 | -8.10E-11 |
| 12 | 0.00 | -7.16E-04 | -2.66E-05 | 1.69E-06 | -5.22E-08 | 3.78E-10 | 3.36E-12 |
| 13 | 0.00 | -3.43E-03 | 6.61E-05 | 2.98E-07 | -1.27E-08 | 6.96E-11 | 0.00E+00 |
| 14 | 0.00 | -2.67E-03 | 4.93E-05 | -7.80E-07 | 6.98E-09 | -3.11E-11 | 0.00E+00 |
TABLE 7
7-9 and tables 1 and 6-7 above show that, the unmanned aerial vehicle lens of this embodiment adopts seven lenses, through the collocation of focal power and shape of each lens, and reasonable optical parameter setting, can realize small volume (TTL is less than or equal to 20 mm), low cost, lightweight (2G 5P), big aperture (FNO=1.55), at night shoot effect good, definition high (wavelength range 435-950 nm) and big target surface etc. at least one beneficial effect, be applicable to unmanned aerial vehicle and shoot under different light and temperature conditions, can effectively optimize balanced colour difference simultaneously, weaken ghost image.
Example IV
Fig. 10 is a schematic optical structure diagram of a lens of an unmanned aerial vehicle according to a fourth embodiment of the present utility model.
In this embodiment:
the fourth lens L4 is a convex lens.
In the present embodiment, the radius of curvature R (mm), thickness d (mm), refractive index Nd, and abbe number Vd of each face of the unmanned aerial vehicle lens are referred to table 8:
| face number | Surface type | Radius of curvature R | Thickness d | Refractive index Nd | Abbe number Vd |
| 1 | Spherical surface | 8.127 | 2.76 | 1.57 | 71.3 |
| 2 | Spherical surface | 47.090 | 0.75 | 1.69 | 31.2 |
| 3 | Spherical surface | 28.370 | 0.41 | ||
| Stop | Spherical surface | infinity | 0.75 | ||
| 5 | Aspherical surface | 6.591 | 0.85 | 1.64 | 23.5 |
| 6 | Aspherical surface | 5.170 | 1.55 | ||
| 7 | Aspherical surface | 25.785 | 2.60 | 1.54 | 55.7 |
| 8 | Aspherical surface | -8.349 | 0.13 | ||
| 9 | Aspherical surface | -7.575 | 1.37 | 1.66 | 20.4 |
| 10 | Aspherical surface | -17.321 | 1.36 | ||
| 11 | Aspherical surface | 11.585 | 1.34 | 1.64 | 23.5 |
| 12 | Aspherical surface | 27.704 | 1.98 | ||
| 13 | Aspherical surface | -24.106 | 1.33 | 1.54 | 55.7 |
| 14 | Aspherical surface | 9.882 | 1.48 | ||
| 15 | Spherical surface | infinity | 0.80 | 1.52 | 64.2 |
| 16 | Spherical surface | infinity | 0.54 | ||
| IMAGE | Spherical surface | infinity | 0.00 |
TABLE 8
In this embodiment, the K value and aspherical coefficients of the lens of the unmanned aerial vehicle are shown in table 9:
| face number | K value | A4 | A6 | A8 | A10 | A12 | A14 |
| 5 | 0.00 | -1.59E-03 | -2.42E-05 | -5.85E-07 | 1.22E-07 | -3.74E-09 | -1.29E-11 |
| 6 | 0.00 | -1.85E-03 | -4.11E-05 | -1.82E-06 | 3.06E-07 | -1.27E-08 | 1.35E-10 |
| 7 | 0.00 | -2.69E-04 | -5.42E-05 | 3.07E-06 | -2.76E-07 | 1.23E-08 | -2.28E-10 |
| 8 | 0.00 | 8.93E-04 | -1.03E-04 | -1.08E-06 | 1.01E-07 | 4.33E-09 | -2.06E-10 |
| 9 | 0.00 | 1.13E-03 | -4.92E-05 | -1.10E-06 | -6.13E-09 | 3.14E-09 | 1.52E-11 |
| 10 | 0.00 | -1.39E-03 | 8.68E-05 | -4.39E-06 | 7.73E-08 | -1.21E-09 | 3.82E-11 |
| 11 | 0.00 | -1.44E-03 | 1.64E-06 | 3.09E-07 | -1.21E-07 | 4.66E-09 | -9.53E-11 |
| 12 | 0.00 | 2.06E-04 | -6.40E-05 | 2.01E-06 | -4.85E-08 | 3.89E-10 | 2.80E-12 |
| 13 | 0.00 | -3.53E-03 | 5.49E-05 | 6.31E-07 | -1.19E-08 | 8.16E-12 | 0.00E+00 |
| 14 | 0.00 | -3.48E-03 | 7.59E-05 | -1.42E-06 | 1.09E-08 | -1.33E-11 | 0.00E+00 |
TABLE 9
With reference to fig. 10-12 and tables 1 and 8-9, the unmanned aerial vehicle lens of the present embodiment adopts seven lenses, and through the collocation of the focal power and the shape of each lens and reasonable optical parameter setting, at least one of the beneficial effects of small volume (TTL less than or equal to 20 mm), low cost, light weight (2G 5P), large aperture (fno=1.55), good night shooting effect, high definition (wavelength range 435-950 nm), large target surface and the like can be realized, and the unmanned aerial vehicle lens is suitable for unmanned aerial vehicle carrying and shooting under different light and temperature conditions, and meanwhile, balance chromatic aberration can be effectively optimized, and ghost images can be reduced.
Example five
Fig. 13 is a schematic optical structure diagram of a lens of an unmanned aerial vehicle according to a fifth embodiment of the present utility model.
In this embodiment:
the fourth lens L4 is a convex lens.
In the present embodiment, the radius of curvature R (mm), thickness d (mm), refractive index Nd, and abbe number Vd of each face of the unmanned aerial vehicle lens are referred to table 10:
| face number | Surface type | Radius of curvature R | Thickness d | Refractive index Nd | Abbe number Vd |
| 1 | Spherical surface | 8.136 | 2.72 | 1.57 | 71.3 |
| 2 | Spherical surface | 43.746 | 0.75 | 1.69 | 31.2 |
| 3 | Spherical surface | 26.713 | 0.42 | ||
| Stop | Spherical surface | infinity | 0.65 | ||
| 5 | Aspherical surface | 6.482 | 0.85 | 1.64 | 23.5 |
| 6 | Aspherical surface | 5.128 | 1.51 | ||
| 7 | Aspherical surface | 22.379 | 2.58 | 1.54 | 55.7 |
| 8 | Aspherical surface | -9.235 | 0.30 | ||
| 9 | Aspherical surface | -7.608 | 1.13 | 1.66 | 20.4 |
| 10 | Aspherical surface | -25.459 | 1.00 | ||
| 11 | Aspherical surface | 9.893 | 1.33 | 1.64 | 23.5 |
| 12 | Aspherical surface | 32.897 | 2.36 | ||
| 13 | Aspherical surface | -31.043 | 1.33 | 1.54 | 55.7 |
| 14 | Aspherical surface | 9.189 | 0.30 | ||
| 15 | Spherical surface | infinity | 0.80 | 1.52 | 64.2 |
| 16 | Spherical surface | infinity | 1.73 | ||
| IMAGE | Spherical surface | infinity | 0.00 |
Table 10
In this embodiment, the K value and aspherical coefficients of the lens of the unmanned aerial vehicle are shown in table 11:
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TABLE 11
With reference to fig. 13-15 and tables 1 and 10-11, the unmanned aerial vehicle lens of the present embodiment adopts seven lenses, and through matching of focal power and shape of each lens and reasonable optical parameter setting, at least one of the beneficial effects of small volume (TTL is less than or equal to 20 mm), low cost, light weight (2G 5P), large aperture (fno=1.54), good night shooting effect, high definition (wavelength range 435-950 nm), large target surface and the like can be realized, and the unmanned aerial vehicle lens is suitable for unmanned aerial vehicle carrying and shooting under different light and temperature conditions, and meanwhile balance chromatic aberration can be effectively optimized, and ghost images can be reduced.
Example six
Fig. 16 is a schematic optical structure diagram of a lens of an unmanned aerial vehicle according to a sixth embodiment of the present utility model.
In this embodiment:
the fourth lens L4 is a convex lens.
In the present embodiment, the radius of curvature R (mm), thickness d (mm), refractive index Nd, and abbe number Vd of each face of the unmanned aerial vehicle lens are referred to table 12:
| face number | Surface type | Radius of curvature R | Thickness d | Refractive index Nd | Abbe number Vd |
| 1 | Spherical surface | 8.060 | 2.81 | 1.57 | 71.3 |
| 2 | Spherical surface | 45.853 | 0.75 | 1.69 | 31.2 |
| 3 | Spherical surface | 25.647 | 0.48 | ||
| Stop | Spherical surface | infinity | 0.60 | ||
| 5 | Aspherical surface | 6.440 | 0.85 | 1.64 | 23.5 |
| 6 | Aspherical surface | 5.138 | 1.60 | ||
| 7 | Aspherical surface | 23.622 | 2.46 | 1.54 | 55.7 |
| 8 | Aspherical surface | -9.120 | 0.28 | ||
| 9 | Aspherical surface | -7.550 | 1.03 | 1.66 | 20.4 |
| 10 | Aspherical surface | -23.509 | 1.20 | ||
| 11 | Aspherical surface | 10.480 | 1.45 | 1.64 | 23.5 |
| 12 | Aspherical surface | 38.501 | 2.22 | ||
| 13 | Aspherical surface | -39.975 | 1.27 | 1.54 | 55.7 |
| 14 | Aspherical surface | 8.597 | 0.36 | ||
| 15 | Spherical surface | infinity | 0.80 | 1.52 | 64.2 |
| 16 | Spherical surface | infinity | 1.62 | ||
| IMAGE | Spherical surface | infinity | 0.00 |
Table 12
In this embodiment, the K value and aspherical coefficients of the lens of the unmanned aerial vehicle are shown in table 13:
| face number | K value | A4 | A6 | A8 | A10 | A12 | A14 |
| 5 | 0.00 | -1.64E-03 | -3.51E-05 | -6.78E-07 | 1.43E-07 | -3.53E-09 | -3.02E-11 |
| 6 | 0.00 | -1.98E-03 | -6.15E-05 | -1.63E-06 | 3.11E-07 | -1.48E-08 | 2.25E-10 |
| 7 | 0.00 | -3.45E-04 | -5.90E-05 | 1.82E-06 | -2.90E-07 | -2.90E-07 | -1.12E-10 |
| 8 | 0.00 | 4.87E-04 | -9.80E-05 | -1.24E-06 | 8.68E-08 | 6.36E-09 | -2.95E-10 |
| 9 | 0.00 | 1.40E-03 | -5.36E-05 | -1.35E-06 | 7.75E-08 | 4.83E-09 | -1.26E-10 |
| 10 | 0.00 | -1.07E-03 | 6.83E-05 | -2.85E-06 | 5.88E-08 | -3.22E-09 | 1.22E-10 |
| 11 | 0.00 | -1.14E-03 | -2.80E-05 | 7.20E-07 | -1.70E-08 | -5.48E-10 | -2.76E-11 |
| 12 | 0.00 | 6.67E-04 | -1.18E-04 | 4.45E-06 | -7.83E-08 | -6.95E-10 | 2.50E-11 |
| 13 | 0.00 | -4.44E-03 | 7.62E-05 | 4.51E-07 | -6.31E-09 | -6.69E-11 | -1.98E-13 |
| 14 | 0.00 | -4.39E-03 | 1.05E-04 | -2.28E-06 | 3.06E-08 | -2.40E-10 | 1.03E-12 |
TABLE 13
With reference to fig. 16-18 and tables 1 and 12-13, the unmanned aerial vehicle lens of the present embodiment adopts seven lenses, and through matching of focal power and shape of each lens and reasonable optical parameter setting, at least one of the beneficial effects of small volume (TTL less than or equal to 20 mm), low cost, light weight (2G 5P), large aperture (fno=1.55), good night shooting effect, high definition (wavelength range 435-950 nm), large target surface and the like can be realized, and the unmanned aerial vehicle lens is suitable for unmanned aerial vehicle carrying and shooting under different light and temperature conditions, and meanwhile, balance chromatic aberration can be effectively optimized, and ghost images can be reduced.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (17)
1. The unmanned aerial vehicle lens sequentially comprises a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6) and a seventh lens (L7) along the direction from the object side to the image side,
the first lens (L1) is a convex-concave lens with positive focal power;
the second lens (L2) is a convex-concave lens having negative optical power;
the third lens (L3) is a convex-concave lens with negative focal power;
the fourth lens (L4) is a lens with positive focal power and convex image side;
the fifth lens (L5) is a meniscus lens having negative optical power;
the sixth lens (L6) is a convex-concave lens having positive optical power;
the seventh lens (L7) is a concave lens having negative optical power;
the maximum image height IH of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens meet the following conditions: IH/TTL is more than or equal to 0.8 and less than or equal to 1.1.
2. The unmanned aerial vehicle lens according to claim 1, wherein the effective focal length f1 of the first lens (L1) and the total effective focal length f of the unmanned aerial vehicle lens satisfy: f1/f is more than or equal to 0.9 and less than or equal to 1.2.
3. The unmanned aerial vehicle lens according to claim 1, wherein the effective focal length f2 of the second lens (L2) and the total effective focal length f of the unmanned aerial vehicle lens satisfy: -9.5.ltoreq.f2/f.ltoreq.5.2.
4. The unmanned aerial vehicle lens according to claim 1, wherein the combined effective focal length f12 of the first lens (L1) and the second lens (L2) and the total effective focal length f of the unmanned aerial vehicle lens satisfy: f12/f is more than or equal to 0.9 and less than or equal to 1.4.
5. The unmanned aerial vehicle lens according to claim 1, wherein the effective focal length f3 of the third lens (L3) and the total effective focal length f of the unmanned aerial vehicle lens satisfy: -3.5.ltoreq.f3/f.ltoreq.2.4.
6. The unmanned aerial vehicle lens according to claim 1, wherein the effective focal length f4 of the fourth lens (L4) and the total effective focal length f of the unmanned aerial vehicle lens satisfy: f4/f is more than or equal to 0.7 and less than or equal to 1.1.
7. The unmanned aerial vehicle lens according to claim 1, wherein the effective focal length f5 of the fifth lens (L5) and the total effective focal length f of the unmanned aerial vehicle lens satisfy: -1.7.ltoreq.f5/f.ltoreq.0.9.
8. The unmanned aerial vehicle lens according to claim 1, wherein the effective focal length f6 of the sixth lens (L6) and the total effective focal length f of the unmanned aerial vehicle lens satisfy: f6/f is more than or equal to 1.2 and less than or equal to 2.4.
9. The unmanned aerial vehicle lens according to claim 1, wherein the effective focal length f7 of the seventh lens (L7) and the total effective focal length f of the unmanned aerial vehicle lens satisfy: -0.9.ltoreq.f7/f.ltoreq.0.7.
10. The unmanned aerial vehicle lens according to claim 1, wherein the combined effective focal length f67 of the sixth lens (L6) and the seventh lens (L7) and the total effective focal length f of the unmanned aerial vehicle lens satisfy: -4.3.ltoreq.f67/f.ltoreq.1.2.
11. The unmanned aerial vehicle lens according to claim 1, wherein the interval T45 of the fourth lens (L4) and the fifth lens (L5), the interval T23 of the second lens (L2) and the third lens (L3) satisfy: T45/T23 is more than or equal to 0.1 and less than or equal to 0.4.
12. The unmanned aerial vehicle lens of claim 1, wherein the back focal length BFL of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens satisfy: BFL/TTL is more than or equal to 0 and less than or equal to 0.2.
13. The unmanned aerial vehicle lens according to claim 1, wherein the maximum clear full aperture D1 of the first lens (L1) and the maximum image height IH of the unmanned aerial vehicle lens satisfy: D1/IH is more than or equal to 0.6 and less than or equal to 0.8.
14. The unmanned aerial vehicle lens according to claim 1, wherein the object side radius of curvature R11 of the first lens (L1) and the maximum clear full aperture D1 of the first lens (L1) satisfy: R11/D1 is more than or equal to 0.6 and less than or equal to 0.8.
15. The unmanned aerial vehicle lens according to claim 1, wherein a Stop (STO) is located between the second lens (L2) and the third lens (L3), the length TH12 of the object side of the first lens (L1) to the Stop (STO) and the total length TTL of the unmanned aerial vehicle lens satisfy: TH12/TTL is more than or equal to 0 and less than or equal to 0.3.
16. The unmanned aerial vehicle lens according to claim 1, wherein the object-side radius of curvature R21 of the second lens (L2) and the image-side radius of curvature R22 of the second lens (L2) satisfy: (R21-R22)/(R21+R22) is less than or equal to 0.1 and less than or equal to 0.6.
17. The unmanned aerial vehicle lens according to claim 1, wherein the object-side radius of curvature R31 of the third lens (L3) and the image-side radius of curvature R32 of the third lens (L3) satisfy: and (R31-R32)/(R31+R32) is less than or equal to 0.2.
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