CN107861229B - High definition wide angle unmanned aerial vehicle camera lens - Google Patents
High definition wide angle unmanned aerial vehicle camera lens Download PDFInfo
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- CN107861229B CN107861229B CN201711317057.4A CN201711317057A CN107861229B CN 107861229 B CN107861229 B CN 107861229B CN 201711317057 A CN201711317057 A CN 201711317057A CN 107861229 B CN107861229 B CN 107861229B
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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
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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
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Abstract
The invention discloses a high-definition wide-angle unmanned aerial vehicle lens, which comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an optical filter, and an imaging device; the light emitted from the object sequentially passes through the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the diaphragm, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the optical filter and then outputs light, and the output light forms an image on the imaging device. By arranging the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the diaphragm, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the optical filter and the imaging equipment, high definition is realized, meanwhile, the phenomenon of purple fringing is eliminated, and the quality of an acquired image is improved.
Description
Technical Field
The invention relates to the field of unmanned aerial vehicles, in particular to a high-definition wide-angle unmanned aerial vehicle lens.
Background
Unmanned aerial vehicles rapidly develop, and the requirements on components such as lenses in the unmanned aerial vehicles are higher and higher, for example, the resolution requirements are from common 1080P to 5MP high definition, or 4K extremely clear, and the unmanned aerial vehicles are close to 9MP and even 12MP; the target surface is also large, such as 1/2.3'; but also focus more and more on details such as broad spectrum blushing.
When the traditional visible light imaging lens is designed, the wavelength is usually F light (486 nm), d light (588 nm) and C light (656 nm), and the specific gravity is 1:1:1. The lens designed in this way has serious purple-edge phenomenon with large visual field when in use, for example, a straight and white-brushed street lamp pole is shot at a far distance, and the street lamp pole is found to be accompanied with purple edge.
In order to solve the problem of purple fringing, the plastic aspheric lens is introduced into the enterprise development lens, so that the weight is reduced, the structural composition is simplified, the overall size is small, but the temperature characteristic is poor, and the high definition can not be maintained within the temperature range of-20 ℃ to +80 ℃.
Disclosure of Invention
The invention aims to provide a high-definition wide-angle unmanned aerial vehicle lens capable of eliminating purple edges of images under the condition of ensuring high definition.
In order to achieve the above-mentioned object, the invention provides the following scheme:
high definition wide angle unmanned aerial vehicle camera lens, unmanned aerial vehicle camera lens is photographed the object, acquires the image of object, unmanned aerial vehicle camera lens specifically includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an optical filter, and an imaging device;
the light emitted from the object sequentially passes through the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the diaphragm, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the optical filter to output light, and the output light forms an image on the imaging device;
the first lens is a biconvex lens with positive focal power;
the second lens is a meniscus lens with positive focal power, the incident surface of the second lens is a convex surface of the meniscus lens, and the emergent surface of the second lens is a concave surface of the meniscus lens;
the third lens is a meniscus lens with negative focal power, the incident surface of the third lens is a convex surface of the meniscus lens, and the emergent surface of the third lens is a concave surface of the meniscus lens;
the fourth lens is a biconvex lens with positive focal power;
the fifth lens is a biconcave lens with negative focal power;
the emergent surface of the fourth lens is attached to the incident surface of the fifth lens;
the sixth lens is a biconvex lens with positive focal power;
the seventh lens is a biconvex lens with positive focal power;
the eighth lens is a meniscus lens with negative focal power, the incident surface of the eighth lens is a convex surface of the meniscus lens, and the emergent surface of the eighth lens is a concave surface of the meniscus lens;
the ninth lens is a biconvex lens with positive focal power;
the tenth lens is a meniscus lens with negative focal power, the incident surface of the tenth lens is a concave surface of the meniscus lens, and the emergent surface of the tenth lens is a convex surface of the meniscus lens;
and the emergent surface of the ninth lens is attached to the incident surface of the tenth lens.
Optionally, the unmanned aerial vehicle lens further includes: the lens barrel, the space ring and the end cover are used for packaging the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the diaphragm, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the optical filter.
Optionally, the imaging device is a CMOS image sensor or a CCD image sensor.
Optionally, the refractive index nd1 of the first lens is more than or equal to 1.8, and the Abbe number Vd1 of the first lens is more than or equal to 40;
the refractive index nd2 of the second lens is more than or equal to 1.9, and the Abbe number Vd2 of the second lens is less than or equal to 30;
the refractive index nd3 of the third lens is less than or equal to 1.7, and the Abbe number Vd3 of the third lens is more than or equal to 40;
the refractive index nd4 of the fourth lens is less than or equal to 1.7, and the Abbe number Vd4 of the fourth lens is more than or equal to 40;
the refractive index nd5 of the fifth lens is more than or equal to 1.8, and the Abbe number Vd5 of the fifth lens is less than or equal to 25;
the difference nd5-nd4 between the refractive index of the fifth lens and the refractive index of the fourth lens is more than or equal to 0.15, and the difference Vd4-Vd5 between the Abbe number of the fourth lens and the Abbe number of the fifth lens is more than or equal to 25;
the refractive index nd6 of the sixth lens is more than or equal to 1.9, and the Abbe number Vd6 of the sixth lens is less than or equal to 20;
the refractive index nd7 of the seventh lens is less than or equal to 1.7, the Abbe number Vd7 of the seventh lens is more than or equal to 40;
the refractive index nd9 of the ninth lens is less than or equal to 1.65, and the Abbe number Vd9 of the ninth lens is more than or equal to 50;
the refractive index nd10 of the tenth lens is more than or equal to 1.9, and the Abbe number Vd10 of the tenth lens is less than or equal to 36;
and the difference nd10-nd9 between the refractive index of the tenth lens and the refractive index of the ninth lens is more than or equal to 0.25, and the difference Vd9-Vd10 between the Abbe number of the ninth lens and the Abbe number of the tenth lens is more than or equal to 30.
Optionally, the first lens, the second lens, the third lens, the fourth lens and the fifth lens form a front group lens group, and the sixth lens, the seventh lens, the eighth lens, the ninth lens and the tenth lens form a rear group lens group;
the focal length of the front group lens group is f Front part The focal length of the rear group lens group is f Rear part (S) ；
Focal length f of the front group lens group Front part Focal length f of the rear group lens group Rear part (S) Is f in ratio of Front part /f Rear part (S) ；
The ratio f Front part /f Rear part (S) In the range of-2.0.ltoreq.f Front part /f Rear part (S) ≤-1.0。
Optionally, the filter is capable of passing light in the 436nm to 656nm wavelength band.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention discloses a high-definition wide-angle unmanned aerial vehicle lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an optical filter and imaging equipment, wherein light rays emitted from an object sequentially pass through the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the diaphragm, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the optical filter and then are output, the light rays are imaged on the imaging equipment, a 12MP high-definition image is realized, and meanwhile, the purple edge of the 12MP high-definition image is eliminated.
The high-definition wide-angle unmanned aerial vehicle lens also has the advantages of large target surface, large aperture, wide angle, low distortion, anti-ultraviolet, less parasitic light and compact structure, the angle of view is larger than 55 degrees, and the distortion is less than or equal to 2.5%.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a light path diagram of a high-definition wide-angle unmanned aerial vehicle lens provided by the invention;
fig. 2 is a structural cross-sectional view of the high-definition wide-angle unmanned aerial vehicle lens provided by the invention;
fig. 3 is a point column diagram of a high-definition wide-angle unmanned aerial vehicle lens provided by the invention;
FIG. 4 shows a high definition wide angle lens without the present invention a modulation transfer function graph of the man-machine lens;
fig. 5 is a field curvature and distortion diagram of the high-definition wide-angle unmanned aerial vehicle lens provided by the invention;
fig. 6 is a graph of relative illuminance of a high definition wide angle unmanned aerial vehicle lens provided by the present invention;
fig. 7 is an axial chromatic aberration diagram of the high-definition wide-angle unmanned aerial vehicle lens provided by the invention;
fig. 8 is a vertical axis color difference chart of the high-definition wide-angle unmanned aerial vehicle lens;
fig. 9 is a graph of defocus modulation transfer function of a high-definition wide-angle unmanned aerial vehicle lens provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a high-definition wide-angle unmanned aerial vehicle lens capable of eliminating purple edges of images under the condition of ensuring high definition.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the optical path diagram of the high-definition wide-angle unmanned aerial vehicle lens and the structural cross-section of the high-definition wide-angle unmanned aerial vehicle lens shown in fig. 2. The unmanned aerial vehicle camera lens is shot to the object, acquires the image of object, unmanned aerial vehicle camera lens specifically includes: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a stop 13, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a tenth lens 10, a filter 11, and an imaging device.
The light rays emitted from the object sequentially pass through the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the diaphragm 13, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 10 and the optical filter 11, and then the light rays are imaged on the imaging device.
The first lens 1 is a biconvex lens having positive optical power.
The second lens 2 is a meniscus lens with positive focal power, the incident surface of the second lens 2 is a convex surface of the meniscus lens, and the emergent surface of the second lens 2 is a concave surface of the meniscus lens.
The third lens 3 is a meniscus lens with negative focal power, the incident surface of the third lens 3 is a convex surface of the meniscus lens, and the emergent surface of the third lens 3 is a concave surface of the meniscus lens.
The fourth lens 4 is a biconvex lens having positive optical power.
The fifth lens 5 is a biconcave lens having negative optical power.
The emergent surface of the fourth lens 4 is attached to the incident surface of the fifth lens 5, and the emergent surface of the fourth lens 4 and the fifth lens 5 are connected in a gluing way to form a combined lens with positive focal power.
The sixth lens 6 is a biconvex lens having positive optical power.
The seventh lens 7 is a biconvex lens having positive optical power.
The eighth lens 8 is a meniscus lens with negative focal power, the incident surface of the eighth lens 8 is a convex surface of the meniscus lens, and the exit surface of the eighth lens 8 is a concave surface of the meniscus lens.
The ninth lens 9 is a biconvex lens having positive optical power.
The tenth lens 10 is a meniscus lens with negative optical power, the incident surface of the tenth lens 10 is a concave surface of the meniscus lens, and the exit surface of the tenth lens 10 is a convex surface of the meniscus lens.
The outgoing surface of the ninth lens 9 is attached to the incoming surface of the tenth lens 10, and the outgoing surface of the ninth lens 9 and the incoming surface of the tenth lens 10 are glued and connected to form a positive-power combined lens.
A structural cross-sectional view of a high definition wide angle unmanned aerial vehicle lens as shown in fig. 2, the unmanned aerial vehicle lens further comprising: the lens cone 14, the end cover and the space ring are tightly screwed on the top end of the lens cone 14 through the space ring, and the lens cone 14, the end cover and the space ring are used for packaging the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the diaphragm 13, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 10 and the optical filter 11.
The imaging device is a CMOS image sensor or a CCD image sensor, and a sealing cover glass 12 is provided in front of the CMOS image sensor or the CCD image sensor.
The refractive index nd1 of the first lens 1 is more than or equal to 1.8, and the Abbe number Vd1 of the first lens 1 is more than or equal to 40.
The refractive index nd2 of the second lens 2 is more than or equal to 1.9, and the Abbe number Vd2 of the second lens 2 is less than or equal to 30.
The refractive index nd3 of the third lens 3 is less than or equal to 1.7, and the Abbe number Vd3 of the third lens 3 is more than or equal to 40.
The refractive index nd4 of the fourth lens 4 is less than or equal to 1.7, and the Abbe number Vd4 of the fourth lens 4 is more than or equal to 40.
The refractive index nd5 of the fifth lens 5 is more than or equal to 1.8, and the Abbe number Vd5 of the fifth lens 5 is less than or equal to 25.
And the difference nd5-nd4 between the refractive index of the fifth lens 5 and the refractive index of the fourth lens 4 is more than or equal to 0.15, and the difference Vd4-Vd5 between the Abbe number of the fourth lens 4 and the Abbe number of the fifth lens 5 is more than or equal to 25.
The refractive index nd6 of the sixth lens 6 is more than or equal to 1.9, and the Abbe number Vd6 of the sixth lens 6 is less than or equal to 20.
The refractive index nd7 of the seventh lens 7 is less than or equal to 1.7, and the Abbe number Vd7 of the seventh lens 7 is more than or equal to 40.
The refractive index nd9 of the ninth lens 9 is less than or equal to 1.65, and the Abbe number Vd9 of the ninth lens 9 is more than or equal to 50.
The refractive index nd10 of the tenth lens 10 is more than or equal to 1.9, and the Abbe number Vd10 of the tenth lens 10 is less than or equal to 36.
And the difference nd10-nd9 between the refractive index of the tenth lens 10 and the refractive index of the ninth lens 9 is more than or equal to 0.25, and the difference Vd9-Vd10 between the Abbe number of the ninth lens 9 and the Abbe number of the tenth lens 10 is more than or equal to 30.
The first lens 1, the second lens 2, the third lens 3, the fourth lens 4 and the fifth lens 5 form a front group lens group, and the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9 and the tenth lens 10 form a rear group lens group.
The focal length of the front group lens group is f Front part The focal length of the rear group lens group is f Rear part (S) Focal length f of the front group lens group Front part Focal length f of the rear group lens group Rear part (S) Is f in ratio of Front part /f Rear part (S) The method comprises the steps of carrying out a first treatment on the surface of the The ratio f Front part /f Rear part (S) In the range of-2.0.ltoreq.f Front part /f Rear part (S) ≤-1.0。
The optical filter 11 can filter light in the wave band of 436nm to 656nm, so that the high-definition wide-angle unmanned aerial vehicle lens works in the wave band of 436nm to 656 nm.
In the specific examples, the parameters of the glasses used for the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, and the tenth lens 10 are shown in table 1.
The invention relates to a high-definition wide-angle unmanned aerial vehicle lens, the overall focal length value is 7.48mm, the aperture value is 2.5, the angle of view is 58 degrees, the length of the lens is 24.71mm, the incidence angle of the principal ray is less than or equal to 15 degrees, and the image sensor adopted by the imaging equipment is the IMX117 of SONY.
Table 1 units: mm (mm)
As can be seen from fig. 1 and fig. 2, the number of lenses arranged in front of the diaphragm 13 is the same as the number of lenses arranged behind the diaphragm 13, and the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9 and the tenth lens 10 are made of high-performance glass materials, so that the cost is low, and the high-definition wide-angle unmanned aerial vehicle lens can maintain excellent performance in high and low temperature (-20 ℃ to 80 ℃) environments and has good reliability.
The high-definition wide-angle unmanned aerial vehicle lens has good permeability for g light (436 nm), F light (486 nm), e light (546 nm), d light (588 nm) and C light (656 nm), aberration and chromatic aberration correction are carried out, and the problem of purple fringing of visible light wave band imaging is solved.
As shown in the dot column diagram of the high-definition wide-angle unmanned aerial vehicle lens shown in FIG. 3, the weight ratio of g light (436 nm), F light (486 nm), e light (546 nm), d light (588 nm) and C light (656 nm) is 9:23:29:27:10, and it can be seen from FIG. 3 that the diffuse spots under each view are concentrated and distributed uniformly, and the phenomenon that the diffuse spots under a certain view are separated up and down along with the wavelength does not occur, which indicates that the ratio of eliminating purple fringing is better.
As shown in fig. 4, the modulation transfer function graph of the high-definition wide-angle unmanned aerial vehicle lens can be seen from fig. 4, and various aberrations of the high-definition wide-angle unmanned aerial vehicle lens are corrected to a good level, that is, the comprehensive resolution level of the high-definition wide-angle unmanned aerial vehicle lens is high.
The field curvature and distortion map of the lens of the high-definition wide-angle unmanned aerial vehicle as shown in fig. 5 represent distortion values of the lens at different angles of view. The optical distortion of the lens can be seen in fig. 5 as barrel distortion, the absolute value of which is <2.5%.
As shown in fig. 6, the graph of the relative illuminance of the lens of the high-definition wide-angle unmanned aerial vehicle can be seen from fig. 6 that the curve is smoothly reduced, the relative illuminance value under the maximum view field is >0.6, and the imaging picture is bright.
The axial chromatic aberration diagram of the high-definition wide-angle unmanned aerial vehicle lens shown in fig. 7 and the vertical chromatic aberration diagram of the high-definition wide-angle unmanned aerial vehicle lens shown in fig. 8 can obtain that the chromatic aberration of the high-definition wide-angle unmanned aerial vehicle lens is smaller.
As shown in fig. 9, the defocus modulation transfer function curve of the high-definition wide-angle unmanned aerial vehicle lens has a spatial frequency of 160lp/mm and a defocus range of-0.03 mm to 0.03mm, and the field curvature correction degree is better as can be seen from fig. 9. When the lens has a field curvature, the center and the periphery of the acquired image cannot be synchronous clear as a result, namely, when the center of the field of view is adjusted to be the sharpest, the edge is not clear enough, and the edge of the field of view needs to be clearer by reducing the definition of the center of the field of view by callback.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (5)
1. High definition wide angle unmanned aerial vehicle camera lens, unmanned aerial vehicle camera lens is photographed the object, acquires the image of object, its characterized in that, unmanned aerial vehicle camera lens specifically includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an optical filter, and an imaging device;
the light emitted from the object sequentially passes through the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the diaphragm, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the optical filter to output light, and the output light forms an image on the imaging device;
the first lens is a biconvex lens with positive focal power;
the second lens is a meniscus lens with positive focal power, the incident surface of the second lens is a convex surface of the meniscus lens, and the emergent surface of the second lens is a concave surface of the meniscus lens;
the third lens is a meniscus lens with negative focal power, the incident surface of the third lens is a convex surface of the meniscus lens, and the emergent surface of the third lens is a concave surface of the meniscus lens;
the fourth lens is a biconvex lens with positive focal power;
the fifth lens is a biconcave lens with negative focal power;
the emergent surface of the fourth lens is attached to the incident surface of the fifth lens;
the sixth lens is a biconvex lens with positive focal power;
the seventh lens is a biconvex lens with positive focal power;
the eighth lens is a meniscus lens with negative focal power, the incident surface of the eighth lens is a convex surface of the meniscus lens, and the emergent surface of the eighth lens is a concave surface of the meniscus lens;
the ninth lens is a biconvex lens with positive focal power;
the tenth lens is a meniscus lens with negative focal power, the incident surface of the tenth lens is a concave surface of the meniscus lens, and the emergent surface of the tenth lens is a convex surface of the meniscus lens;
the emergent surface of the ninth lens is attached to the incident surface of the tenth lens;
the first lens, the second lens, the third lens, the fourth lens and the fifth lens form a front group lens group, and the sixth lens, the seventh lens, the eighth lens, the ninth lens and the tenth lens form a rear group lens group;
the focal length of the front group lens group is f Front part The focal length of the rear group lens group is f Rear part (S) ；
Focal length f of the front group lens group Front part Focal length f of the rear group lens group Rear part (S) Is f in ratio of Front part /f Rear part (S) ；
The ratio f Front part /f Rear part (S) In the range of-2.0.ltoreq.f Front part /f Rear part (S) ≤-1.0。
2. The high definition wide angle unmanned aerial vehicle lens of claim 1, wherein the unmanned aerial vehicle lens further comprises: the lens barrel, the space ring and the end cover are used for packaging the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the diaphragm, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the optical filter.
3. The high definition wide angle unmanned aerial vehicle lens of claim 1, wherein the imaging device is a CMOS image sensor or a CCD image sensor.
4. The high-definition wide-angle unmanned aerial vehicle lens according to claim 1, wherein the refractive index nd1 of the first lens is more than or equal to 1.8, and the Abbe number Vd1 of the first lens is more than or equal to 40;
the refractive index nd2 of the second lens is more than or equal to 1.9, and the Abbe number Vd2 of the second lens is less than or equal to 30;
the refractive index nd3 of the third lens is less than or equal to 1.7, and the Abbe number Vd3 of the third lens is more than or equal to 40;
the refractive index nd4 of the fourth lens is less than or equal to 1.7, and the Abbe number Vd4 of the fourth lens is more than or equal to 40;
the refractive index nd5 of the fifth lens is more than or equal to 1.8, and the Abbe number Vd5 of the fifth lens is less than or equal to 25;
the difference nd5-nd4 between the refractive index of the fifth lens and the refractive index of the fourth lens is more than or equal to 0.15, and the difference Vd4-Vd5 between the Abbe number of the fourth lens and the Abbe number of the fifth lens is more than or equal to 25;
the refractive index nd6 of the sixth lens is more than or equal to 1.9, and the Abbe number Vd6 of the sixth lens is less than or equal to 20;
the refractive index nd7 of the seventh lens is less than or equal to 1.7, and the Abbe number Vd7 of the seventh lens is more than or equal to 40;
the refractive index nd9 of the ninth lens is less than or equal to 1.65, and the Abbe number Vd9 of the ninth lens is more than or equal to 50;
the refractive index nd10 of the tenth lens is more than or equal to 1.9, and the Abbe number Vd10 of the tenth lens is less than or equal to 36;
and the difference nd10-nd9 between the refractive index of the tenth lens and the refractive index of the ninth lens is more than or equal to 0.25, and the difference Vd9-Vd10 between the Abbe number of the ninth lens and the Abbe number of the tenth lens is more than or equal to 30.
5. The high definition wide angle unmanned aerial vehicle lens of claim 1, wherein the optical filter is capable of passing light in the 436nm to 656nm wavelength band.
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| CN111931659B (en) | 2018-08-21 | 2021-05-14 | 深圳市汇顶科技股份有限公司 | Lens system, fingerprint identification device and terminal equipment |
| CN110361833B (en) * | 2019-06-17 | 2024-04-19 | 厦门力鼎光电股份有限公司 | Optical imaging lens |
| CN110579861B (en) * | 2019-09-12 | 2021-07-20 | 浙江大华技术股份有限公司 | Lens |
| CN112269238B (en) * | 2020-11-04 | 2022-07-29 | 中国航空工业集团公司洛阳电光设备研究所 | Day and night dual-purpose athermal lens with wide illumination range |
| CN113219638B (en) * | 2021-04-28 | 2022-07-22 | 江苏大学 | Ultra-wide-angle high-definition monitoring lens device, monitoring system and correction algorithm |
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| JP2012022105A (en) * | 2010-07-14 | 2012-02-02 | Canon Inc | Optical system and optical equipment including the same |
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| CN105319672A (en) * | 2014-05-26 | 2016-02-10 | 奥林巴斯株式会社 | Wide angle lens and image pickup apparatus using the same |
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