CN114994879A - Unmanned aerial vehicle camera lens - Google Patents

Unmanned aerial vehicle camera lens Download PDF

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CN114994879A
CN114994879A CN202210822709.4A CN202210822709A CN114994879A CN 114994879 A CN114994879 A CN 114994879A CN 202210822709 A CN202210822709 A CN 202210822709A CN 114994879 A CN114994879 A CN 114994879A
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lens
aerial vehicle
unmanned aerial
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focal length
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CN114994879B (en
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何明可
范家永
何均顺
应永茂
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Sunny Optics Zhongshan Co Ltd
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Sunny Optics Zhongshan Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below

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Abstract

The invention relates to an unmanned aerial vehicle lens, along the direction from the object side to the image side of the optical axis, include sequentially: the focusing group comprises a first lens (L1), a second lens (L2), a third lens (L3), a diaphragm, a fourth lens (L4), a fifth lens (L5), a sixth lens (L6) and a seventh lens (L7), wherein the first lens (L1), the second lens (L2), the third lens (L3), the diaphragm, the fourth lens (L4), the fifth lens (L5), the sixth lens (L6) and the seventh lens (L7) are sequentially arranged, the focusing group has negative focal power, and the focusing group comprises an eighth lens (L8) and a ninth lens (L9) which are sequentially arranged. The unmanned aerial vehicle lens realizes clear imaging with infinite object distance up to 0.4m, has the characteristics of miniaturization, low production cost, low distortion and large target surface, can meet the high resolving power of more than twenty million pixels, and does not have virtual focus within the temperature range of-40 ℃ to +85 ℃.

Description

Unmanned aerial vehicle camera lens
Technical Field
The invention relates to the technical field of imaging optics, in particular to an unmanned aerial vehicle lens.
Background
Along with the promotion of unmanned aerial vehicle technique, unmanned aerial vehicle application scope of taking photo by plane is more and more extensive, but present unmanned aerial vehicle camera lens have various defects, for example, the processing degree of difficulty is great, and the structure is long, unsatisfied miniaturized development trend. In addition, the resolution of the aerial image is not high, which causes the image to be unclear, and the aerial lens is greatly distorted, which causes the image to be deformed, so that the requirements of small volume, high pixel, large target surface and low distortion can not be met, and the application scene is limited.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide an unmanned aerial vehicle lens which can meet the requirement of clear imaging with an object distance of infinity to 0.4m and does not have virtual focus within a temperature range of-40 ℃ to +85 ℃.
In order to achieve the above object, the present invention provides an unmanned aerial vehicle lens, which sequentially includes, along a direction from an object side to an image side along an optical axis: the focusing group moves along an optical axis to perform focusing when the object distance changes, the fixed group comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged, the focusing group has negative focal power, and the focusing group comprises an eighth lens and a ninth lens which are sequentially arranged.
According to an aspect of the present invention, the first lens, the second lens, the fifth lens, and the eighth lens have negative optical power;
the third lens, the fourth lens, the sixth lens, and the seventh lens have positive optical power;
the ninth lens has positive power or negative power.
According to an aspect of the present invention, in a direction from an object side to an image side along an optical axis,
the first lens and the ninth lens are both convex-concave lenses;
the second lens and the seventh lens are both meniscus lenses;
the third lens, the fourth lens and the sixth lens are all convex lenses;
the fifth lens is a concave-concave lens;
the eighth lens is a concave-concave lens or a convex-concave lens.
According to an aspect of the present invention, the first lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the eighth lens are all spherical lenses;
the second lens, the seventh lens, and the ninth lens are all aspheric lenses.
According to an aspect of the present invention, the first lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the eighth lens are all glass lenses;
the second lens, the seventh lens and the ninth lens are all plastic lenses.
According to an aspect of the invention, the fourth lens and the fifth lens are cemented to form a double cemented lens.
According to one aspect of the invention, the following conditional expression is satisfied between the focal length F45 of the double cemented lens and the focal length F of the unmanned aerial vehicle lens: F45/F is more than or equal to-2.7 and less than or equal to-1.1.
According to an aspect of the invention, the refractive index Nd of the third lens 3 And Abbe number Vd 3 The following conditional expressions are respectively satisfied: nd of not less than 1.58 3 ≤1.63；60≤Vd 3 ≤70。
According to an aspect of the invention, the refractive index Nd of the fifth lens 5 And Abbe number Vd 5 The following conditional expressions are respectively satisfied: nd of not less than 1.8 5 ≤1.95；20≤Vd 5 ≤40。
According to one aspect of the invention, the following conditional expression is satisfied between the focal length F of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens: F/TTL is more than or equal to 0.32 and less than or equal to 0.38.
According to one aspect of the invention, the following conditional expression is satisfied between the total length TTL of the unmanned aerial vehicle lens and the focal length Fg of the fixed group: TTL/Fg is more than or equal to 3.3 and less than or equal to 3.9.
According to one aspect of the invention, the following conditional expression is satisfied between the focal length F of the unmanned aerial vehicle lens and the focal length Fg of the fixed group: F/Fg is more than or equal to 1.1 and less than or equal to 1.4.
According to one aspect of the invention, the following conditional expression is satisfied between the focal length F of the unmanned aerial vehicle lens and the focal length Ft of the focusing group: F/Ft is more than or equal to-0.7 and less than or equal to-0.4.
According to the scheme of the invention, an internal focusing mode of a first fixed group (namely a fixed group) with positive focal power and a second focusing group (namely a focusing group) with negative focal power is adopted, so that the focusing stability and speed of the lens of the unmanned aerial vehicle are improved, and the lens can realize clear imaging with the object distance of infinity to 0.4 m. The aberration is effectively corrected by optimally configuring the positive and negative focal powers of all the lenses and matching different shapes of all the lenses, the lens has the characteristics of miniaturization, low distortion and large target surface, can meet the high resolution of more than twenty million pixels, and can clearly image in the temperature range of-40 ℃ to +85 ℃.
According to one scheme of the invention, an optical framework of nine lenses and two lens groups is adopted, and a specific combination of a plastic aspheric lens and a glass spherical lens is adopted in a mixed manner, so that on one hand, the defect that the focus drifts easily under different environments of high temperature and low temperature due to large expansion coefficient of the plastic aspheric lens is overcome, the lens is not virtual focus under different temperature environments, and the imaging performance of the lens in the temperature range of-40 ℃ to +85 ℃ is improved. On the other hand, the use of three plastic aspheric lenses reduces the production cost of the lens.
According to one scheme of the invention, the double-cemented lens formed by the fourth lens and the fifth lens through cementing and the relation and the range between the focal length of the double-cemented lens and the focal length of the unmanned aerial vehicle lens are limited, so that the tolerance sensitivity of the lens unit caused by inclination/core deviation and the like in the assembling process can be reduced, the assembling parts between the lenses and the lenses are reduced, the working procedures are reduced, and the cost is reduced.
According to an aspect of the invention, the refractive index Nd of the third lens 3 And Abbe number Vd 3 The following conditional expressions are respectively satisfied: nd of 1.58 or more 3 ≤1.63；60≤Vd 3 Less than or equal to 70 ℃, and is more beneficial to preventing virtual focus of an optical system in the temperature range of minus 40 ℃ to plus 85 ℃.
According to an aspect of the invention, the refractive index Nd of the fifth lens 5 And Abbe number Vd 5 The following conditional expressions are respectively satisfied: nd of not less than 1.8 5 ≤1.95；20≤Vd 5 Be less than or equal to 40, be favorable to optical lens's epaxial aberration can obtain better compensation, further promote the imaging quality of this unmanned aerial vehicle camera lens.
According to one scheme of the invention, the following conditional expression is satisfied between the focal length F of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens: F/TTL is not less than 0.32 and not more than 0.38, so that the size of the unmanned aerial vehicle lens is miniaturized, and the resolution power of the lens is improved.
According to one scheme of the invention, the following conditional expression is satisfied between the total length TTL of the lens of the unmanned aerial vehicle and the focal length Fg of the fixed group: TTL/Fg is more than or equal to 3.3 and less than or equal to 3.9, which is beneficial to improving the resolution power of the lens and reducing the sensitivity of the lens.
According to one scheme of the invention, the focal length F of the lens of the unmanned aerial vehicle, the focal length Fg of the fixed group and the focal length Ft of the focusing group respectively satisfy the following conditional expressions: F/Fg is more than or equal to 1.1 and less than or equal to 1.4; F/Ft is more than or equal to-0.7 and less than or equal to-0.4, so that various aberrations of the optical lens are sufficiently corrected, and the optical performance such as the resolution of lens imaging, distortion optimization and Chief Ray Angle (CRA) optimization can be realized while the structure of the optical lens is compact.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 schematically shows a schematic structural diagram of a lens of an unmanned aerial vehicle according to a first embodiment of the present invention;
fig. 2 schematically shows a schematic structural view of a lens of an unmanned aerial vehicle according to a second embodiment of the present invention;
fig. 3 schematically shows a schematic structural diagram of a lens of an unmanned aerial vehicle according to a third embodiment of the present invention;
fig. 4 schematically shows a schematic structural diagram of an unmanned aerial vehicle lens according to a fourth embodiment of the present invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The embodiments described in this specification are to be considered in all respects as illustrative and not restrictive, and the appended drawings are intended to be part of the entire specification. In the drawings, the shape or thickness of the embodiments may be exaggerated and simplified or conveniently indicated. Further, the components of the structures in the drawings are described separately, and it should be noted that the components not shown or described in the drawings are well known to those skilled in the art.
Any reference to directions and orientations to the description of the embodiments herein is merely for convenience of description and should not be construed as limiting the scope of the invention in any way. The following description of the preferred embodiments refers to combinations of features which may be present independently or in combination, and the present invention is not particularly limited to the preferred embodiments. The scope of the invention is defined by the claims.
Referring to fig. 1, an unmanned aerial vehicle lens provided in the embodiment of the present invention sequentially includes, in a direction from an object side to an image side along an optical axis: a fixed group having positive power and a focusing group having negative power. The fixed group comprises a first lens L1, a second lens L2, a third lens L3, a diaphragm, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 which are sequentially arranged, and the focusing group comprises an eighth lens L8 and a ninth lens L9 which are sequentially arranged. When the object distance is changed, the focusing group can move along the optical axis to perform focusing.
In the embodiment of the present invention, the first lens L1, the second lens L2, the fifth lens L5, and the eighth lens L8 each have negative optical power, the third lens L3, the fourth lens L4, the sixth lens L6, and the seventh lens L7 each have positive optical power, and the ninth lens L9 has positive optical power or negative optical power.
In the embodiment of the present invention, the object side surfaces of the first lens L1 and the ninth lens L9 are both convex, and the image side surfaces thereof are both concave. The second lens L2 and the seventh lens L7 both have a concave object-side surface shape and a convex image-side surface shape. The object-side and image-side surfaces of the third lens L3, the fourth lens L4, and the sixth lens L6 are all convex in shape. The object-side surface and the image-side surface of the fifth lens L5 are both concave in shape. The object-side surface of the eighth lens L8 is concave, and the image-side surface thereof is concave or convex.
According to the lens group with different positive and negative focal powers and the lens combination thereof in the unmanned aerial vehicle lens, the internal focusing mode of the first fixed group (namely the fixed group) with the positive focal power and the second focusing group (namely the focusing group) with the negative focal power is adopted, so that the focusing stability and speed of the unmanned aerial vehicle lens are improved, and the lens can realize clear imaging with the object distance of infinity to 0.4 m. The aberration is effectively corrected by optimally configuring the positive and negative focal powers of all the lenses and matching different shapes of all the lenses, the lens has the characteristics of miniaturization, low distortion and large target surface, can meet the high resolution of more than twenty million pixels, and can clearly image in the temperature range of-40 ℃ to +85 ℃.
In the embodiment of the present invention, the first lens L1, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the eighth lens L8 are all spherical lenses, and the second lens L2, the seventh lens L7 and the ninth lens L9 are all aspheric lenses.
In the embodiment of the invention, the first lens L1, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the eighth lens L8 are all glass lenses, and the second lens L2, the seventh lens L7 and the ninth lens L9 are all plastic lenses.
The unmanned aerial vehicle lens provided by the embodiment of the invention adopts an optical framework of nine lenses and two lens groups, and adopts the specific plastic aspheric lens and the specific glass spherical lens in a mixing manner, so that on one hand, the defect that the focus drifts easily under different environments of high and low temperature due to large expansion coefficient of the plastic aspheric lens is overcome, the lens is not virtual focus under different temperature environments, and the imaging performance of the lens in the temperature range of-40 ℃ to +85 ℃ is improved. On the other hand, the use of three plastic aspheric lenses reduces the production cost of the lens.
In the embodiment of the present invention, the fourth lens L4 and the fifth lens L5 are cemented together to form a double cemented lens. Further, the following conditional expression is satisfied between the focal length F45 of the double cemented lens and the focal length F of the unmanned aerial vehicle lens: F45/F is more than or equal to-2.7 and less than or equal to-1.1. The double cemented lens is arranged, the relation between the focal length of the double cemented lens and the focal length of the unmanned aerial vehicle lens and the range of the relation are limited, tolerance sensitivity of the lens unit caused by inclination/core deviation and the like in the assembling process can be reduced, assembling parts between the lenses are reduced, the working procedures are reduced, and the cost is reduced.
In the embodiment of the invention, the refractive index Nd of the third lens L3 3 And Abbe number Vd 3 The following conditional expressions are respectively satisfied: nd of not less than 1.58 3 ≤1.63；60≤Vd 3 Less than or equal to 70. By adopting the third lens L3 with the specific refractive index and the specific dispersion coefficient, the optical system is more beneficial to not being virtual focus in the temperature range of-40 ℃ to +85 ℃.
In the embodiment of the invention, the refractive index Nd of the fifth lens L5 5 And Abbe number Vd 5 The following conditional expressions are respectively satisfied: nd of not less than 1.8 5 ≤1.95；20≤Vd 5 Less than or equal to 40. Through carrying out above-mentioned specific design to fifth lens L5's refracting index and abbe number, be favorable to optical lens's the epaxial aberration of an image can obtain better compensation, further promote the imaging quality of this unmanned aerial vehicle camera lens.
In the embodiment of the invention, the following conditional expression is satisfied between the focal length F of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens: F/TTL is more than or equal to 0.32 and less than or equal to 0.38. Through satisfying this conditional expression, not only be favorable to the volume of this unmanned aerial vehicle camera lens to become miniaturized, be favorable to improving the resolution power of camera lens moreover.
In the embodiment of the invention, the total length TTL of the lens of the unmanned aerial vehicle and the focal length Fg of the fixed group satisfy the following conditional expression: TTL/Fg is more than or equal to 3.3 and less than or equal to 3.9. The relationship between the total length of the lens and the focal length of the fixed group is set in such a way, so that the improvement of the resolution of the lens is facilitated, and the sensitivity of the lens is reduced.
In the embodiment of the invention, the following conditional expression is satisfied between the focal length F of the lens of the unmanned aerial vehicle and the focal length Fg of the fixed group: F/Fg is more than or equal to 1.1 and less than or equal to 1.4. The following conditional expression is satisfied between the focal length F of the unmanned aerial vehicle lens and the focal length Ft of the focusing group: F/Ft is more than or equal to-0.7 and less than or equal to-0.4. The relationship and the range between the focal length of the fixed group and the focal length of the focusing group in the optical lens are set, so that various aberrations of the optical lens are fully corrected, the structure of the optical lens is compact, and meanwhile, the imaging resolution of the lens can be improved, the distortion is optimized, and the optical performances such as the Chief Ray Angle (CRA) are optimized.
In summary, the unmanned aerial vehicle lens provided by the embodiment of the invention adopts an internal focusing mode of the fixed group with positive focal power and the focusing group with negative focal power, so that the focusing stability and speed of the unmanned aerial vehicle lens are improved, and the lens can realize clear imaging with the object distance of infinity to 0.4 m. By optimally configuring the positive and negative focal powers, focal lengths and materials of all the lenses and matching different shapes of all the lenses, various aberrations of the lens are effectively corrected, on-axis aberrations are better compensated, the tolerance sensitivity of the lens units and the lens is reduced, so that the lens has the characteristics of miniaturization, low production cost, low distortion and large target surface, can meet the high resolving power of more than two million pixels, and can clearly image in the temperature range of-40 ℃ to +85 ℃. Meanwhile, the lens single part has better assembly tolerance and good manufacturability.
The following describes the unmanned aerial vehicle lens according to four embodiments in combination with the accompanying drawings and tables. In the following embodiments, the present invention will be described with the stop as one face, the parallel flat plates positioned between the ninth lens L9 and the image plane as two faces, and the image plane as one face.
The parameters of each example specifically satisfying the above conditional expressions are shown in table 1 below:
conditional formula (II) Example one Example two EXAMPLE III Example four
1.58≤Nd 3 ≤1.63 1.58 1.59 1.59 1.6
60≤Vd 3 ≤70 65 68.3 68.4 68.7
1.8≤Nd 5 ≤1.95 1.91 1.9 1.89 1.9
20≤Vd 5 ≤40 33.9 31.4 31.3 31.2
-2.7≤F45/F≤-1.1 -1.61 -1.20 -1.30 -2.61
0.32≤F/TTL≤0.38 0.34 0.36 0.35 0.36
3.3≤TTL/Fg≤3.9 3.66 3.60 3.65 3.40
1.1≤F/Fg≤1.4 1.23 1.29 1.26 1.22
-0.7≤F/Ft≤-0.4 -0.52 -0.65 -0.56 -0.57
Table 1 in an embodiment of the present invention, an aspheric lens of the unmanned aerial vehicle lens satisfies the following formula:
Figure BDA0003742875110000071
in the above formula, z is the axial distance from the curved surface to the vertex at the position of the height h perpendicular to the optical axis along the optical axis direction; c represents the curvature at the apex of the aspherical surface; k is a conic coefficient; a. the 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 The aspherical coefficients of the fourth, sixth, eighth, tenth, twelfth, fourteenth and sixteenth orders are expressed respectively.
Example one
Referring to fig. 1, the parameters of the lens of the unmanned aerial vehicle of the embodiment are as follows: focal length F ═ 8.76 mm; the focal length Fg of the fixed group is 7.1mm, and the focal length Ft of the focusing group is-16.89 mm; the total length TTL is 26 mm.
Table 2 lists the relevant parameters of each lens in the lens of the unmanned aerial vehicle of this embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, and abbe number.
Figure BDA0003742875110000081
Figure BDA0003742875110000091
TABLE 2
Table 3 lists aspheric coefficients of each aspheric lens of the unmanned aerial vehicle lens of the present embodiment, including: the conic surface constant K and fourth-order aspheric surface coefficient A 4 Sixth order aspherical surface coefficient A 6 Eighth order aspherical surface coefficient A 8 Ten-order aspheric surface coefficient A 10 Twelve-order aspheric surface coefficient A 12 And fourteen order aspheric coefficients A 14 。
Noodle sequence number K A 4 A 6 A 8 A 10 A 12 A 14
S3 -0.45 -5.87E-04 5.18E-05 -2.24E-06 5.51E-08 1.53E-10 -7.25E-17
S4 -0.23 -4.76E-05 4.39E-05 -2.57E-06 9.93E-08 -1.01E-09 1.45E-15
S13 15.88 -9.79E-04 1.24E-04 -4.45E-06 2.59E-08 2.20E-09 -1.01E-15
S14 1.52 -1.11E-03 1.49E-04 -4.12E-06 -2.25E-08 3.07E-09 4.77E-16
S17 -1.18 -5.68E-03 1.29E-04 -7.74E-07 -3.95E-08 2.37E-15 -2.53E-17
S18 -3.78 -3.73E-03 1.04E-04 -1.69E-06 5.79E-09 -2.15E-16 6.64E-18
TABLE 3
With reference to fig. 1 and tables 1 to 3, the lens of the unmanned aerial vehicle of the embodiment realizes clear imaging with an object distance of infinity to 0.4m, has the characteristics of miniaturization, low production cost, low distortion and large target surface, can meet high resolution of more than twenty million pixels, and is free from virtual focus in a temperature range of-40 ℃ to +85 ℃. Meanwhile, the lens unit has better assembly tolerance and good manufacturability.
Example two
Referring to fig. 2, the parameters of the lens of the unmanned aerial vehicle of the embodiment are as follows: focal length F is 9.29 mm; the focal length Fg of the fixed group is 7.21mm, and the focal length Ft of the focusing group is 14.16 mm; total length TTL is 26.01 mm.
Table 4 lists the relevant parameters of each lens in the lens of the unmanned aerial vehicle of this embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, and abbe number.
Figure BDA0003742875110000092
Figure BDA0003742875110000101
TABLE 4
Table 5 lists aspheric coefficients of each aspheric lens of the unmanned aerial vehicle lens of the present embodiment, including: the quadric surface constant K and the fourth-order aspheric surface coefficient A of the surface 4 Sixth order aspherical surface coefficient A 6 Eighth order aspheric surface coefficient A 8 Ten-order aspheric surface coefficient A 10 Twelve-order aspheric surface coefficient A 12 And fourteen order aspheric coefficients A 14 。
Figure BDA0003742875110000102
Figure BDA0003742875110000111
TABLE 5
With reference to fig. 2 and tables 1, 4, and 5, the lens of the unmanned aerial vehicle of the embodiment realizes clear imaging with an object distance of infinity to 0.4m, has the characteristics of miniaturization, low production cost, low distortion, and large target surface, can satisfy high resolution power of more than twenty million pixels, and is free of virtual focus in a temperature range of-40 ℃ to +85 ℃. Meanwhile, the lens unit has better assembly tolerance and good manufacturability.
EXAMPLE III
Referring to fig. 3, the parameters of the lens of the unmanned aerial vehicle of the embodiment are as follows: the focal length F is 8.99 mm; the focal length Fg of the fixed group is 7.12mm, and the focal length Ft of the focusing group is-15.88 mm; the total length TTL is 26 mm.
Table 6 lists relevant parameters of each lens in the lens of the unmanned aerial vehicle of the present embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, and abbe number.
Figure BDA0003742875110000112
Figure BDA0003742875110000121
TABLE 6
Table 7 lists aspheric coefficients of each aspheric lens of the unmanned aerial vehicle lens of the present embodiment, including: the quadric surface constant K and the fourth-order aspheric surface coefficient A of the surface 4 Sixth order aspherical surface coefficient A 6 Eighth order aspheric surface coefficient A 8 Ten-order aspheric surface coefficient A 10 Twelve-order aspheric surface coefficient A 12 And fourteen order aspheric coefficients A 14 。
Number of noodles K A 4 A 6 A 8 A 10 A 12 A 14
S3 -0.48 -6.03E-04 5.08E-05 -2.28E-06 4.98E-08 1.61E-10 3.03E-12
S4 -0.18 -3.21E-05 4.39E-05 -2.62E-06 9.60E-08 -1.04E-09 4.51E-14
S13 16.75 -9.95E-04 1.23E-04 -4.35E-06 3.56E-08 2.18E-09 5.16E-13
S14 1.57 -1.11E-03 1.49E-04 -4.15E-06 -2.24E-08 3.17E-09 -2.08E-12
S17 -1.56 -5.65E-03 1.29E-04 -7.83E-07 -3.96E-08 1.21E-11 5.04E-13
S18 -4.87 -3.85E-03 1.01E-04 -1.66E-06 4.99E-09 -2.67E-12 -8.02E-14
TABLE 7
With reference to fig. 3 and tables 1, 6, and 7, the lens of the unmanned aerial vehicle of the embodiment realizes clear imaging with an object distance of infinity to 0.4m, has the characteristics of miniaturization, low production cost, low distortion, and large target surface, can satisfy high resolution power of more than twenty million pixels, and is free of virtual focus in a temperature range of-40 ℃ to +85 ℃. Meanwhile, the lens unit has better assembly tolerance and good manufacturability.
Example four
Referring to fig. 4, the parameters of the lens of the unmanned aerial vehicle of the embodiment are as follows: focal length F is 9.10 mm; the focal length Fg of the fixed group is 7.44mm, and the focal length Ft of the focusing group is-15.86 mm; and the total length TTL is 25.36 mm.
Table 8 lists relevant parameters of each lens in the lens of the unmanned aerial vehicle of this embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, and abbe number.
Figure BDA0003742875110000131
Figure BDA0003742875110000141
TABLE 8
Table 9 lists aspheric coefficients of each aspheric lens of the unmanned aerial vehicle lens of the present embodiment, including: the quadric surface constant K and the fourth-order aspheric surface coefficient A of the surface 4 Sixth order aspherical surface coefficient A 6 Eighth order aspheric surface coefficient A 8 Ten-order aspheric surface coefficient A 10 Twelve-order aspheric surface coefficient A 12 And fourteen order aspheric coefficients A 14 。
Number of noodles K A 4 A 6 A 8 A 10 A 12 A 14
S3 -1.13 -2.18E-04 1.25E-05 -6.51E-10 -1.04E-07 3.93E-09 0.00E+00
S4 -0.55 2.12E-04 1.13E-05 -1.08E-06 -1.31E-08 1.99E-09 0.00E+00
S13 -14.68 -9.97E-04 6.72E-05 -2.82E-06 1.26E-07 -2.40E-09 0.00E+00
S14 -1.39 -1.57E-03 1.32E-04 -5.35E-06 1.85E-07 -2.52E-09 0.00E+00
S17 -0.88 -4.82E-03 1.12E-04 -1.58E-06 0.00E+00 0.00E+00 0.00E+00
S18 -3.78 -2.77E-03 5.63E-05 -7.06E-07 0.00E+00 0.00E+00 0.00E+00
TABLE 9
As shown in fig. 4 and tables 1, 8, and 9, the lens of the unmanned aerial vehicle of the present embodiment realizes clear imaging with an infinite object distance of up to 0.4m, has the characteristics of miniaturization, low production cost, low distortion, and large target surface, can satisfy high resolving power of more than twenty million pixels, and is free of virtual focus in a temperature range of-40 ℃ to +85 ℃. Meanwhile, the lens single part has better assembly tolerance and good manufacturability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (13)

1. The utility model provides an unmanned aerial vehicle camera lens, along the direction of optical axis from the object side to the image side, includes in proper order: the focusing group moves along an optical axis to perform focusing when an object distance changes, and comprises a first lens (L1), a second lens (L2), a third lens (L3), a diaphragm, a fourth lens (L4), a fifth lens (L5), a sixth lens (L6) and a seventh lens (L7) which are sequentially arranged, wherein the focusing group has negative focal power, and comprises an eighth lens (L8) and a ninth lens (L35 9) which are sequentially arranged.
2. The UAV lens according to claim 1, wherein the first lens (L1), the second lens (L2), the fifth lens (L5) and the eighth lens (L8) each have a negative power;
the third lens (L3), the fourth lens (L4), the sixth lens (L6), and the seventh lens (L7) each have positive optical power;
the ninth lens (L9) has a positive power or a negative power.
3. The UAV lens of claim 1, wherein along the optical axis in a direction from the object side to the image side,
the first lens (L1) and the ninth lens (L9) are both convex-concave lenses;
the second lens (L2) and the seventh lens (L7) are both meniscus lenses;
the third lens (L3), the fourth lens (L4), and the sixth lens (L6) are each convex lenses;
the fifth lens (L5) is a concave-concave lens;
the eighth lens (L8) is a concave-concave lens or a convex-concave lens.
4. The UAV lens according to claim 1, wherein the first lens (L1), the third lens (L3), the fourth lens (L4), the fifth lens (L5), the sixth lens (L6) and the eighth lens (L8) are all spherical lenses;
the second lens (L2), the seventh lens (L7), and the ninth lens (L9) are all aspheric lenses.
5. The UAV lens according to claim 1, wherein the first lens (L1), the third lens (L3), the fourth lens (L4), the fifth lens (L5), the sixth lens (L6) and the eighth lens (L8) are all glass lenses;
the second lens (L2), the seventh lens (L7), and the ninth lens (L9) are all plastic lenses.
6. A UAV lens according to any of claims 1-5, characterized in that the fourth lens (L4) and the fifth lens (L5) are cemented to form a double cemented lens.
7. The UAV lens of claim 6, wherein the following conditional expression is satisfied between the focal length F45 of the cemented doublet and the focal length F of the UAV lens: F45/F is more than or equal to minus 2.7 and less than or equal to minus 1.1.
8. A UAV lens according to any of claims 1-5, characterized in that the refractive index Nd of the third lens (L3) 3 And Abbe number Vd 3 The following conditional expressions are respectively satisfied: nd of not less than 1.58 3 ≤1.63；60≤Vd 3 ≤70。
9. A UAV lens according to any of claims 1-5, characterized in that the refractive index Nd of the fifth lens (L5) 5 And Abbe number Vd 5 The following conditional expressions are respectively satisfied: nd of not less than 1.8 5 ≤1.95；20≤Vd 5 ≤40。
10. An unmanned aerial vehicle lens as claimed in any one of claims 1-5, wherein the following conditional expression is satisfied between the focal length F of the unmanned aerial vehicle lens and the total length TTL of the unmanned aerial vehicle lens: F/TTL is more than or equal to 0.32 and less than or equal to 0.38.
11. A UAV lens according to any of claims 1-5, wherein the total length TTL of the UAV lens and the focal length Fg of the fixed group satisfy the following condition: TTL/Fg is more than or equal to 3.3 and less than or equal to 3.9.
12. An unmanned aerial vehicle lens as claimed in any one of claims 1-5, wherein the following conditional expression is satisfied between the focal length F of the unmanned aerial vehicle lens and the focal length Fg of the fixed group: F/Fg is more than or equal to 1.1 and less than or equal to 1.4.
13. An unmanned aerial vehicle lens as claimed in any one of claims 1-5, wherein the following conditional expression is satisfied between the focal length F of the unmanned aerial vehicle lens and the focal length Ft of the focusing group: F/Ft is more than or equal to-0.7 and less than or equal to-0.4.
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0281015A (en) * 1988-09-19 1990-03-22 Nikon Corp Telephoto lens capable of short-distance photographing
US5144489A (en) * 1990-05-18 1992-09-01 Nikon Corporation Compact wide-angle zoom lens
TW305028B (en) * 1994-02-03 1997-05-11 Nicon Kk
US20040076417A1 (en) * 2001-04-02 2004-04-22 Yoshito Miyatake Zoom lens and electronic still camera using it
US20130265648A1 (en) * 2012-04-06 2013-10-10 Pentax Ricoh Imaging Company, Ltd. Macro lens system
JP2013210604A (en) * 2012-02-28 2013-10-10 Ricoh Imaging Co Ltd Close range correction lens system
CN104238075A (en) * 2014-08-19 2014-12-24 利达光电股份有限公司 Large-aperture large-view-field high-resolution monitoring lens confocal in day and night
CN113703144A (en) * 2021-09-26 2021-11-26 江西凤凰光学科技有限公司 High-pixel large-target-surface lens
CN217587746U (en) * 2022-07-12 2022-10-14 舜宇光学(中山)有限公司 Unmanned aerial vehicle camera lens

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0281015A (en) * 1988-09-19 1990-03-22 Nikon Corp Telephoto lens capable of short-distance photographing
US5144489A (en) * 1990-05-18 1992-09-01 Nikon Corporation Compact wide-angle zoom lens
TW305028B (en) * 1994-02-03 1997-05-11 Nicon Kk
US20040076417A1 (en) * 2001-04-02 2004-04-22 Yoshito Miyatake Zoom lens and electronic still camera using it
JP2013210604A (en) * 2012-02-28 2013-10-10 Ricoh Imaging Co Ltd Close range correction lens system
US20130265648A1 (en) * 2012-04-06 2013-10-10 Pentax Ricoh Imaging Company, Ltd. Macro lens system
CN104238075A (en) * 2014-08-19 2014-12-24 利达光电股份有限公司 Large-aperture large-view-field high-resolution monitoring lens confocal in day and night
CN113703144A (en) * 2021-09-26 2021-11-26 江西凤凰光学科技有限公司 High-pixel large-target-surface lens
CN217587746U (en) * 2022-07-12 2022-10-14 舜宇光学(中山)有限公司 Unmanned aerial vehicle camera lens

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