CN114063256A - Unmanned aerial vehicle camera lens - Google Patents
Unmanned aerial vehicle camera lens Download PDFInfo
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- CN114063256A CN114063256A CN202111506257.0A CN202111506257A CN114063256A CN 114063256 A CN114063256 A CN 114063256A CN 202111506257 A CN202111506257 A CN 202111506257A CN 114063256 A CN114063256 A CN 114063256A
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- 230000003287 optical effect Effects 0.000 claims abstract description 24
- 239000011521 glass Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims 1
- 230000004304 visual acuity Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 description 5
- 230000004075 alteration Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000012149 noodles Nutrition 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
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Classifications
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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
-
- 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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
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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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
- G02B15/1421—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only the first group being positive
Abstract
The invention relates to an unmanned aerial vehicle lens, which comprises a first lens group (G1) and a second lens group (G2) which are arranged in sequence from an object side to an image side along an optical axis, wherein the second lens group (G2) is a focusing group, and the first lens group (G1) and the second lens group (G2) both have positive focal power. The unmanned aerial vehicle lens has the characteristics of large target surface, high resolving power, small volume and miniaturization, and is free of virtual focus within the temperature range of-30-70 ℃.
Description
Technical Field
The invention relates to the technical field of optical imaging, in particular to an unmanned aerial vehicle lens.
Background
With the development of science and technology, the lens of the unmanned aerial vehicle is gradually widely applied in the fields of aerial photography, detective, surveillance, communication, electronic interference and the like, and becomes an important tool in industries such as civil use, military use and the like. But current unmanned aerial vehicle camera lens has various defects, for example, the processing degree of difficulty is great, and the structure is lengthy, does not satisfy miniaturized development trend. In addition, the focal length of the lens is generally small, so that the target surface of the chip which can be matched is not large enough. And some lenses have large temperature drift, so that the imaging quality of the lenses can be influenced when the temperature disturbance is too large. In addition, the resolution of the existing lens is low, so that the definition of a shot picture is low, and the imaging quality of the unmanned aerial vehicle camera lens is seriously influenced.
Disclosure of Invention
The invention aims to provide an unmanned aerial vehicle lens.
In order to achieve the above object, the present invention provides an unmanned aerial vehicle lens, including a first lens group and a second lens group arranged in sequence from an object side to an image side along an optical axis, where the second lens group is a focusing group, and both the first lens group and the second lens group have positive power.
According to an aspect of the present invention, the first lens group includes a first lens of a concavo-convex type, a second lens of a concavo-convex type, a third lens of a concavo-convex type, a fourth lens of a concavo-convex type or a concavo-convex type, a fifth lens of a concavo-convex type, a sixth lens of a concavo-concave type, a seventh lens of a concavo-convex type, and an eighth lens of a concavo-convex type.
According to an aspect of the present invention, the first lens has a negative power, the second lens has a negative power, the third lens has a positive power, the fourth lens has a positive power, the fifth lens has a positive power, the sixth lens has a negative power, the seventh lens has a positive power, and the eighth lens has a negative power.
According to an aspect of the present invention, the second lens group includes a ninth lens of a concavo-convex type and a tenth lens of a concavo-convex type.
According to an aspect of the invention, the ninth lens has a positive optical power, and the tenth lens has a negative or positive optical power.
According to one aspect of the invention, further comprising a stop located between the third lens and the fourth lens.
According to one aspect of the present invention, at least four aspheric lenses are included.
According to an aspect of the present invention, at least one of the aspheric lenses is made of glass.
According to an aspect of the invention, the refractive index Nd of the aspherical lens satisfies the following condition: nd is more than or equal to 1.5.
According to one aspect of the present invention, the lens comprises at least one cemented lens group.
According to an aspect of the invention, the focal length Fa of the cemented lens group and the focal length F of the unmanned aerial vehicle lens satisfy the following relationship: Fa/F is less than or equal to-34.25 and less than or equal to 21.97.
According to an aspect of the invention, the focal length F1 of the first lens group and the focal length F of the drone lens satisfy the following relation: F1/F is more than or equal to 1.11 and less than or equal to 1.56.
According to an aspect of the invention, the focal length F2 of the second lens group and the focal length F of the drone lens satisfy the following relation: F2/F is more than or equal to 1.67 and less than or equal to 2.76.
According to one aspect of the invention, the focal length F and the total optical length TTL of the lens of the unmanned aerial vehicle satisfy the following relationship: F/TTL is more than or equal to 0.34 and less than or equal to 0.36.
According to one scheme of the invention, by reasonably setting the focal power of each group and the focal power and the shape of each lens in each group, the light trend of the whole unmanned aerial vehicle lens can be stable, the unmanned aerial vehicle lens has high resolving power, virtual focus is not generated within the temperature range of minus 30-70 ℃, and the unmanned aerial vehicle lens has the characteristic of a large target surface.
According to one scheme of the invention, the unmanned aerial vehicle lens has high resolution by reasonably setting the aspheric lens, the material and the refractive index of the aspheric lens.
According to one scheme of the invention, by reasonably setting the cemented lens group and the relationship between the focal length of the cemented lens group and the focal length of the lens, the chromatic aberration and the aberration of the unmanned aerial vehicle lens can be reduced, so that tolerance sensitivity is reduced, and the production yield is improved.
According to one scheme of the invention, the relation between the focal length of each lens group and the focal length of the lens is reasonably set, so that the tolerance sensitivity among the groups can be reduced, the unmanned aerial vehicle lens has high resolution, the assembly yield can be improved, and the characteristic of wide angle can be realized.
According to one scheme of the invention, the small size and miniaturization of the unmanned aerial vehicle lens can be realized by reasonably setting the relationship between the focal length and the optical total length of the lens.
Drawings
Fig. 1 schematically shows a structure of a lens of an unmanned aerial vehicle according to a first embodiment of the present invention;
fig. 2 schematically shows a structure view of a lens of an unmanned aerial vehicle according to a second embodiment of the present invention;
fig. 3 schematically shows a structure view of a lens of an unmanned aerial vehicle according to a third embodiment of the present invention.
Detailed Description
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.
In describing embodiments of the present invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship that is based on the orientation or positional relationship shown in the associated drawings, which is for convenience and simplicity of description only, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above-described terms should not be construed as limiting the present invention.
The present invention is described in detail below with reference to the drawings and the specific embodiments, which are not repeated herein, but the embodiments of the present invention are not limited to the following embodiments.
Referring to fig. 1, the unmanned aerial vehicle lens of the present invention includes a first lens group G1 and a second lens group G2 arranged in order from an object side to an image side along an optical axis. The second lens group G2 is a focusing group, that is, when the object distance changes, the second lens group G2 can move along the optical axis to complete focusing. In the present invention, the first lens group G1 and the second lens group G2 each have positive power.
In the present invention, the first lens group G1 includes a concave-convex first lens L1, a concave-convex second lens L2, a concave-convex third lens L3, a stop STO, a convex-convex or concave-convex fourth lens L4, a convex-convex fifth lens L5, a concave-concave sixth lens L6, a concave-convex seventh lens L7, and a concave-convex eighth lens L8. The first lens L1 has a negative power, the second lens L2 has a negative power, the third lens L3 has a positive power, the fourth lens L4 has a positive power, the fifth lens L5 has a positive power, the sixth lens L6 has a negative power, the seventh lens L7 has a positive power, and the eighth lens L8 has a negative power. The second lens group G2 includes a concavo-convex type ninth lens L9 and a concavo-convex type tenth lens L10. The ninth lens L9 has positive optical power, and the tenth lens L10 has negative or positive optical power.
The arrangement is met, the light trend of the whole unmanned aerial vehicle lens is stable, the high-resolution-power unmanned aerial vehicle lens has high resolving power, virtual focus is not generated within the temperature range of minus 30-70 ℃, and the characteristic of a large target surface is realized.
The unmanned aerial vehicle lens at least comprises four aspheric lenses, wherein at least one aspheric lens is made of glass. The refractive index Nd of the aspherical lens satisfies the following conditions: nd is more than or equal to 1.5. So, can make the unmanned aerial vehicle camera lens possess high resolution power.
The unmanned aerial vehicle lens at least comprises a gluing lens group, and the focal length Fa of the gluing lens group and the focal length F of the unmanned aerial vehicle lens meet the following relation: Fa/F is less than or equal to-34.25 and less than or equal to 21.97. Therefore, the chromatic aberration and the aberration of the lens of the unmanned aerial vehicle can be reduced, the tolerance sensitivity of the system is reduced, and the production yield of the lens is improved.
In the invention, the focal length F1 of the first lens group G1 and the focal length F of the unmanned aerial vehicle lens satisfy the following relation: F1/F is more than or equal to 1.11 and less than or equal to 1.56. The focal length F2 of the second lens group G2 and the focal length F of the unmanned aerial vehicle lens satisfy the following relationship: F2/F is more than or equal to 1.67 and less than or equal to 2.76. So, can effectively reduce the tolerance sensitivity between the unmanned aerial vehicle camera lens group, make the unmanned aerial vehicle camera lens possess high resolution power to can improve the equipment yield of camera lens, realize the wide-angle characteristic of unmanned aerial vehicle camera lens simultaneously.
In the invention, the focal length F and the total optical length TTL (i.e., the distance from the object side of the first lens L1 to the image plane) of the lens of the unmanned aerial vehicle satisfy the following relationship: F/TTL is more than or equal to 0.34 and less than or equal to 0.36. So, can realize little volume, the miniaturized characteristic of unmanned aerial vehicle camera lens.
In conclusion, the unmanned aerial vehicle lens has the characteristics of large target surface, high resolution, small size and miniaturization. In addition, the production yield of the lens is high, the tolerance sensitivity among the groups is low, the moving response speed among the groups is high, and the lens is not burnt within the temperature range of minus 30 ℃ to 70 ℃.
In the following, the unmanned aerial vehicle lens of the present invention will be described in detail by using three embodiments, in which the surfaces of the optical elements are denoted by 1, 2, …, and N, the stop is denoted by STO, and the Image plane is denoted by Image. The aspheric formula is:
wherein z is the axial distance from the curved surface to the vertex at the position with the height h perpendicular to the optical axis along the direction of the optical axis; c represents the curvature at the apex of the aspherical surface; k is a conic coefficient; a. the4、A6、A8、A10、A12、A14、A16The aspherical coefficients of the fourth, sixth, eighth, tenth, twelfth, fourteenth and sixteenth orders are expressed respectively.
The parameters of each embodiment specifically satisfying the above conditional expressions are shown in table 1 below:
TABLE 1
First embodiment
Referring to fig. 1, in the present embodiment, the tenth lens L10 has a negative power, and the parameters of each optical element of the drone lens are as shown in table 2 below:
TABLE 2
The aspherical surface coefficients of the aspherical lenses in the present embodiment are shown in table 3 below:
| number of noodles | Value of K | A4 | A6 | A8 | A10 | A12 | A14 |
| 3 | -2.19 | 2.03E-05 | -8.18E-06 | 1.74E-07 | -1.65E-09 | 4.30E-12 | 0.00E+00 |
| 4 | -0.58 | 2.55E-05 | -2.61E-06 | 1.20E-07 | -2.02E-09 | 1.10E-11 | 0.00E+00 |
| 5 | -1.17 | -2.51E-05 | 5.83E-07 | 6.87E-08 | 7.14E-10 | -3.10E-11 | 0.00E+00 |
| 6 | -4.23 | 8.06E-05 | 2.57E-06 | -1.17E-07 | 9.68E-09 | -1.90E-10 | 0.00E+00 |
| 13 | -0.22 | 1.63E-04 | 1.33E-05 | 2.39E-06 | -9.72E-08 | 1.20E-09 | 0.00E+00 |
| 14 | -0.5 | 4.21E-04 | -1.18E-06 | 1.97E-06 | -5.35E-08 | 4.60E-10 | 0.00E+00 |
| 19 | 0.12 | -3.70E-04 | 4.81E-06 | -3.35E-08 | 1.24E-10 | -1.80E-13 | 0.00E+00 |
| 20 | 0.57 | -4.50E-04 | 2.09E-06 | 5.04E-09 | -1.15E-10 | 3.30E-13 | 0.00E+00 |
TABLE 3
Second embodiment
Referring to fig. 2, in the present embodiment, the tenth lens L10 has positive optical power, and the parameters of each optical element of the drone lens are as shown in table 4 below:
TABLE 4
The aspherical surface coefficients of the aspherical lenses in the present embodiment are shown in table 5 below:
TABLE 5
Third embodiment
Referring to fig. 3, in the present embodiment, the tenth lens L10 has positive optical power, and the parameters of each optical element of the drone lens are as shown in table 6 below:
TABLE 6
The aspherical surface coefficients of the aspherical lenses in the present embodiment are shown in table 7 below:
| number of noodles | Value of K | A4 | A6 | A8 | A10 | A12 | A14 |
| 3 | -2.77 | 2.99E-05 | -8.91E-06 | 2.33E-07 | -3.98E-09 | 3.00E-11 | 0.00E+00 |
| 4 | -2.44 | 1.35E-04 | -8.04E-06 | 1.42E-07 | -1.69E-09 | 1.10E-11 | 0.00E+00 |
| 5 | -1.19 | -1.17E-04 | 6.11E-06 | 6.22E-08 | -6.30E-09 | 1.10E-10 | 0.00E+00 |
| 6 | -13 | -1.14E-05 | 9.96E-06 | -7.33E-08 | -7.08E-09 | 1.70E-10 | 0.00E+00 |
| 13 | -0.33 | 7.27E-04 | 1.25E-05 | 1.41E-06 | -6.80E-08 | 9.50E-10 | 0.00E+00 |
| 14 | -0.33 | 5.77E-04 | 1.00E-05 | 9.37E-07 | -3.28E-08 | 3.30E-10 | 0.00E+00 |
| 19 | -0.5 | -2.44E-04 | 3.80E-06 | -3.23E-08 | 1.58E-10 | -3.90E-13 | 0.00E+00 |
| 20 | -33.55 | -2.78E-04 | 2.87E-06 | -1.22E-08 | 1.34E-11 | -3.40E-14 | 0.00E+00 |
TABLE 7
The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and it is apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. An unmanned aerial vehicle lens comprises a first lens group (G1) and a second lens group (G2) which are sequentially arranged from an object side to an image side along an optical axis, wherein the second lens group (G2) is a focusing group, the first lens group (G1) and the second lens group (G2) both have positive focal power, and the unmanned aerial vehicle lens further comprises a diaphragm (STO) which is positioned in the first lens group (G1) and is positioned between a third lens and a fourth lens along the optical axis from the object side to the image side.
2. The drone lens of claim 1, wherein the first lens group (G1) comprises a first lens of the convex-concave type (L1), a second lens of the convex-concave type (L2), a third lens of the convex-concave type (L3), a fourth lens of the convex-convex or convex-concave type (L4), a fifth lens of the convex-convex type (L5), a sixth lens of the concave-concave type (L6), a seventh lens of the convex-concave type (L7), and an eighth lens of the convex-concave type (L8).
3. The drone lens of claim 2, wherein the first lens (L1) has a negative power, the second lens (L2) has a negative power, the third lens (L3) has a positive power, the fourth lens (L4) has a positive power, the fifth lens (L5) has a positive power, the sixth lens (L6) has a negative power, the seventh lens (L7) has a positive power, and the eighth lens (L8) has a negative power.
4. The UAV lens set of claim 1, wherein the second lens group (G2) includes a ninth lens (L9) of the concavo-convex type and a tenth lens (L10) of the concavo-convex type.
5. The UAV lens according to claim 4, wherein the ninth lens (L9) has a positive optical power and the tenth lens (L10) has a negative or positive optical power.
6. The unmanned aerial vehicle lens of claim 1, comprising at least four aspheric lenses.
7. The unmanned aerial vehicle lens of claim 6, wherein at least one of the aspheric lenses is made of glass.
8. An unmanned aerial vehicle lens as claimed in claim 6, wherein the refractive index Nd of the aspheric lens satisfies the following condition: nd is more than or equal to 1.5.
9. The UAV lens of claim 1, comprising at least one set of glue lenses.
10. A drone lens according to claim 9, characterised in that the focal length Fa of the cemented lens group and the focal length F of the drone lens satisfy the following relation: Fa/F is less than or equal to-34.25 and less than or equal to 21.97.
11. A drone lens according to any one of claims 1 to 10, characterised in that the focal length F1 of the first lens group (G1) and the focal length F of the drone lens satisfy the following relationship: F1/F is more than or equal to 1.11 and less than or equal to 1.56.
12. A drone lens according to any one of claims 1 to 10, characterised in that the focal length F2 of the second lens group (G2) and the focal length F of the drone lens satisfy the following relationship: F2/F is more than or equal to 1.67 and less than or equal to 2.76.
13. A drone lens according to any one of claims 1 to 10, characterised in that the focal length F and the total optical length TTL of the drone lens satisfy the following relationship: F/TTL is more than or equal to 0.34 and less than or equal to 0.36.
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| CN113589474A (en) * | 2021-07-02 | 2021-11-02 | 舜宇光学(中山)有限公司 | Imaging lens |
| CN216351489U (en) * | 2021-12-10 | 2022-04-19 | 舜宇光学(中山)有限公司 | Unmanned aerial vehicle camera lens |
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2021
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| JP2008151949A (en) * | 2006-12-15 | 2008-07-03 | Nikon Corp | Wide angle lens, imaging apparatus, and focusing method of the wide angle lens |
| JP2014235176A (en) * | 2013-05-30 | 2014-12-15 | 株式会社タムロン | Inner focus type lens |
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