CN111929816B - High-definition aerial photographing optical system and lens - Google Patents
High-definition aerial photographing optical system and lens Download PDFInfo
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- CN111929816B CN111929816B CN202010841819.6A CN202010841819A CN111929816B CN 111929816 B CN111929816 B CN 111929816B CN 202010841819 A CN202010841819 A CN 202010841819A CN 111929816 B CN111929816 B CN 111929816B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 90
- 239000000463 material Substances 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000005499 meniscus Effects 0.000 claims description 3
- 230000004075 alteration Effects 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000005286 illumination Methods 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 5
- 206010010071 Coma Diseases 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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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
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The invention discloses a high-definition aerial photographing optical system, which comprises the following components in sequence from an object side to an image side: a first lens having negative optical power; the second lens is provided with negative focal power and is arranged at intervals with the first lens; a third lens having positive power and forming a cemented lens with the second lens; a fourth lens having positive optical power and disposed at an interval from the third lens; a diaphragm STO which is arranged at intervals with the fourth lens and is used for limiting the caliber of the light beam; a fifth lens having positive optical power and disposed at an interval from the stop STO; a sixth lens having negative power and forming a cemented lens with the fifth lens; a seventh lens having negative power and disposed at an interval from the sixth lens; and an eighth lens having positive optical power and disposed at a distance from the seventh lens. Through setting up the lens combination of different structures to the optical power of each lens of rational distribution, when obtaining high definition resolution, realized high definition optical system's that takes photo by plane big target surface, low distortion and high relative illuminance.
Description
Technical Field
The invention relates to the technical field of optical lenses, in particular to a high-definition aerial photographing optical system and a lens.
Background
With the development of image wireless transmission technology, unmanned aerial vehicle carries camera system and carries out taking photo by plane and is favored by more and more people, and market potential is huge. In order to obtain images with clear pictures, real proportion and uniform illumination, the lens often requires higher pixels, smaller picture distortion degree and higher relative illumination, the current aerial lens in the market is generally smaller in target surface, basically adopts a glass-plastic mixed structure, and has the common defects of a plastic lens, such as low pixels, large-view-field lens distortion, serious object-image contrast distortion, lower relative illumination, small temperature application range, easiness in aging and short service life.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a high-definition aerial photographing optical system and a lens, which can solve the problems of low pixels and small target surface of the traditional aerial photographing lens.
According to an embodiment of the first aspect of the present invention, a high-definition aerial photographing optical system includes, in order from an object side to an image side: a first lens having negative optical power; a second lens having negative optical power and disposed at a distance from the first lens; a third lens having positive optical power and constituting a cemented lens with the second lens; a fourth lens having positive optical power and disposed at a distance from the third lens; a stop STO spaced from the fourth lens and configured to limit a beam aperture; a fifth lens having positive optical power and disposed at an interval from the stop STO; a sixth lens having negative optical power and constituting a cemented lens with the fifth lens; a seventh lens having negative optical power and disposed at a distance from the sixth lens; and an eighth lens having positive optical power and disposed at a distance from the seventh lens.
The high-definition aerial photographing optical system provided by the embodiment of the first aspect of the invention has at least the following beneficial effects: through setting up the lens combination of different structures to the optical power of each lens of rational distribution, when obtaining high definition resolution, realized high definition optical system's that takes photo by plane big target surface, low distortion and high relative illuminance.
According to some embodiments of the first aspect of the present invention, a surface of the first lens facing the object side is a convex surface, and a surface facing the image side is a concave surface; the second lens is concave on one surface facing the object side, and is convex on one surface facing the image side; the third lens is of a meniscus structure, one surface facing the object side is a concave surface, and one surface facing the image side is a convex surface; both surfaces of the fourth lens are convex surfaces; both surfaces of the fifth lens are convex surfaces; the surface of the sixth lens facing the object side is a concave surface, and the surface facing the image side is a convex surface; both surfaces of the seventh lens are concave surfaces; both surfaces of the eighth lens are convex.
According to some embodiments of the first aspect of the invention, the Gao Qinghang-beat optical system satisfies the following relationship
-3<f1/f<-1；
-19<f2-3/f<-16；
2<f4/f<4；
1<f5-6/f<3；
-3<f7/f<-1；
2<f8/f<4；
3<TL/f<6；
Wherein f is the focal length of the Gao Qinghang th lens, f 1 is the focal length of the first lens, f 2-3 is the combined focal length of the second lens and the third lens, f 4 is the focal length of the fourth lens, f 5-6 is the combined focal length of the fifth lens and the sixth lens, f 7 is the focal length of the seventh lens, f 8 is the focal length of the eighth lens, and TL is the total length of the Gao Qinghang th lens.
According to some embodiments of the first aspect of the invention, the Gao Qinghang-beat optical system satisfies the following relationship
Nd1≤1.7;Nd2≥1.8；
Nd3≥1.8;Nd4≥1.8；
|Nd5-Nd6|≥0.3;Nd7≥1.8；
Nd8≤1.8；
Wherein Nd 1 is the refractive index of the first lens, nd 2 is the refractive index of the second lens, nd 3 is the refractive index of the third lens, nd 4 is the refractive index of the fourth lens, nd 5 is the refractive index of the fifth lens, nd 6 is the refractive index of the sixth lens, nd 7 is the refractive index of the seventh lens, and Nd 8 is the refractive index of the eighth lens.
According to some embodiments of the first aspect of the invention, the Gao Qinghang-beat optical system satisfies the following relationship
Vd1≥50;|Vd2-Vd3|≥25；
Vd4≤30;|Vd5-Vd6|≥40；
Vd7≤30;Vd8≤50；
Wherein Vd 1 is the abbe number of the first lens, vd 2 is the abbe number of the second lens, vd 3 is the abbe number of the third lens, vd 4 is the abbe number of the fourth lens, vd 5 is the abbe number of the fifth lens, vd 6 is the abbe number of the sixth lens, vd 7 is the abbe number of the seventh lens, and Vd 8 is the abbe number of the eighth lens.
According to some embodiments of the first aspect of the present invention, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are all made of glass materials.
According to some embodiments of the first aspect of the invention, the first lens and the eighth lens are aspherical lenses.
According to some embodiments of the first aspect of the invention, a filter is disposed between the eighth lens and the image side.
According to some embodiments of the first aspect of the present invention, a protective glass is disposed between the optical filter and the image side.
A video lens according to an embodiment of the second aspect of the present invention includes a barrel, and the Gao Qinghang-shot optical system disposed in the barrel.
The high-definition aerial photographing optical system according to the embodiment of the second aspect of the invention has at least the following beneficial effects: through setting up the lens combination of different structures to the optical power of each lens of rational distribution, when obtaining high definition resolution, realized high definition optical system's that takes photo by plane big target surface, low distortion and high relative illuminance.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a high definition aerial photography optical system according to an embodiment of the first aspect of the present invention;
FIG. 2 is a graph of the MTF of a high definition aerial optical system according to an embodiment of the first aspect of the present invention;
FIG. 3 is a graph of the defocus MTF of a high-definition aerial photographing optical system according to an embodiment of the first aspect of the present invention;
FIG. 4 is a graph of distortion in a high definition aerial optical system according to an embodiment of the first aspect of the present invention;
Fig. 5 is a graph of relative illuminance of a high-definition aerial photographing optical system according to an embodiment of the first aspect of the present invention.
Reference numerals:
the optical lens comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a photosensitive chip 9, an optical filter 10 and a protective glass 11.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1, a high-definition aerial photographing optical system according to an embodiment of the first aspect of the present invention includes, in order from an object side to an image side: a first lens 1 having negative optical power; a second lens 2 having negative optical power and disposed at a distance from the first lens 1; a third lens 3 having positive optical power and constituting a cemented lens with the second lens 2; a fourth lens 4 having positive optical power and disposed at a distance from the third lens 3; a diaphragm STO disposed at a distance from the fourth lens 4 and configured to limit a beam aperture; a fifth lens 5 having positive optical power and disposed at a distance from the stop STO; a sixth lens 6 having negative optical power and constituting a cemented lens with the fifth lens 5; a seventh lens 7 having negative optical power and disposed at a distance from the sixth lens 6; an eighth lens 8 having positive optical power and disposed at a distance from the seventh lens 7. The image side is used for arranging a photosensitive chip 9, and the photosensitive chip 9 is arranged at intervals with the eighth lens 8 and used for capturing imaging signals and forming images.
According to the embodiment, the lens combinations with different structures are arranged, the focal power of each lens is reasonably distributed, the high-definition resolution is obtained, and meanwhile, the large target surface, the low distortion and the high relative illumination of the high-definition aerial photographing optical system are realized.
In some embodiments of the first aspect of the present invention, a surface of the first lens 1 facing the object side is a convex surface, and a surface facing the image side is a concave surface; the second lens 2 has a concave surface facing the object side and a convex surface facing the image side; the third lens 3 has a meniscus structure, and a concave surface facing the object side and a convex surface facing the image side; both surfaces of the fourth lens 4 are convex surfaces; both surfaces of the fifth lens 5 are convex; the surface of the sixth lens 6 facing the object side is a concave surface, and the surface facing the image side is a convex surface; both surfaces of the seventh lens 7 are concave surfaces; both surfaces of the eighth lens 8 are convex.
In some embodiments of the first aspect of the present invention, the Gao Qinghang-beat optical system satisfies the following relationship
-3<f1/f<-1；
-19<f2-3/f<-16；
2<f4/f<4；
1<f5-6/f<3；
-3<f7/f<-1；
2<f8/f<4；
3<TL/f<6；
Wherein f is the focal length of the Gao Qinghang th lens, f 1 is the focal length of the first lens 1, f 2-3 is the combined focal length of the second lens 2 and the third lens 3, f 4 is the focal length of the fourth lens 4, f 5-6 is the combined focal length of the fifth lens 5 and the sixth lens 6, f 7 is the focal length of the seventh lens 7, f 8 is the focal length of the eighth lens 8, and TL is the total length of the Gao Qinghang th lens.
In the embodiment, the focal power of each lens has reasonable distribution proportion, and the first lens 1 of the front group has negative focal power, so that the height of an off-axis light beam can be rapidly reduced, the incident angle of the light beam of the rear lens is reduced, and the correction of off-axis aberration is facilitated; the front group of the second lens 2, the third lens 3, the fourth lens 4, the rear group of the fifth lens 5, the sixth lens 6 and the seventh lens 7 form an approximately symmetrical structure, which is beneficial to correcting coma and distortion; the eighth lens element 8 has positive refractive power, which can reduce the incidence angle of the final light beam on the image plane, thereby improving the relative illuminance. The front group and the rear group of the optical system are pulled back and forth by a certain distance in the front and the rear of the diaphragm, which is beneficial for light to reach the target height at the position of the image surface and realize a larger target surface.
In some embodiments of the first aspect of the present invention, the Gao Qinghang-beat optical system satisfies the following relationship
Nd1≤1.7;Nd2≥1.8；
Nd3≥1.8;Nd4≥1.8；
|Nd5-Nd6|≥0.3;Nd7≥1.8；
Nd8≤1.8；
Wherein Nd 1 is the refractive index of the first lens 1, nd 2 is the refractive index of the second lens 2, nd 3 is the refractive index of the third lens 3, nd 4 is the refractive index of the fourth lens 4, nd 5 is the refractive index of the fifth lens 5, nd 6 is the refractive index of the sixth lens 6, nd 7 is the refractive index of the seventh lens 7, and Nd 8 is the refractive index of the eighth lens 8. In this embodiment, the lens combination structure satisfying the refractive index relationship is beneficial to realizing reasonable distribution of optical power, and can better balance spherical aberration, coma aberration and curvature of field, thereby improving the resolving power of the optical system and obtaining a high-definition image.
In some embodiments of the first aspect of the present invention, the Gao Qinghang-beat optical system satisfies the following relationship
Vd1≥50;|Vd2-Vd3|≥25；
Vd4≤30;|Vd5-Vd6|≥40；
Vd7≤30;Vd8≤50；
Where Vd 1 is the abbe number of the first lens 1, vd 2 is the abbe number of the second lens 2, vd 3 is the abbe number of the third lens 3, vd 4 is the abbe number of the fourth lens 4, vd 5 is the abbe number of the fifth lens 5, vd 6 is the abbe number of the sixth lens 6, vd 7 is the abbe number of the seventh lens 7, and Vd 8 is the abbe number of the eighth lens 8.
Because the incidence height of the off-axis light beam on the first sheet is larger, larger vertical axis chromatic aberration is easy to generate, and therefore, the first lens 1 is made of a material with lower dispersion coefficient, which is favorable for reducing the off-axis chromatic aberration; the aperture of the marginal ray of the central view field on the bonding lens formed by the second lens 2 and the third lens 3 is increased after the marginal ray of the central view field is diverged by the first lens 1, so that the second lens 2 and the third lens 3 are made of materials with high refractive indexes, thereby being beneficial to reducing the influence caused by spherical aberration and coma aberration and reducing the field curvature of the lens; after light propagates a long distance before and after passing through the diaphragm, chromatic aberration accumulation becomes large, so that the fifth lens 5 adopts an ultra-low dispersion material to reduce the difference between different wavelengths, thereby reducing chromatic aberration and further improving the lens resolution.
In some embodiments of the first aspect of the present invention, 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, and the eighth lens 8 are all made of glass materials. Compared with plastic materials, the plastic material has higher transmittance to visible light, less final light energy loss, better imaging permeability, and longer service life, and meanwhile, the glass material is not easy to age and deform.
In some embodiments of the first aspect of the present invention, the first lens element 1 and the eighth lens element 8 are aspheric lenses, and because of the large degree of freedom of the aspheric surface, the correction capability for the deflection and aberration of the light is significantly stronger than that of the spherical surface, and the lens distortion can be corrected while the resolution of the lens is further improved.
In some embodiments of the present invention, by setting vignetting as little as possible or not setting vignetting, the peripheral view field light reaches the chip surface through the lens as much as possible, so that the lens obtains higher relative illuminance, and the overall uniformity and permeability of the image plane brightness are ensured.
In some embodiments of the first aspect of the present invention, a filter 10 is disposed between the eighth lens element 8 and the image side, and the filter 10 can filter a part of long waves and stray light, so as to prevent the photosensitive chip from being interfered by infrared rays, thereby making the image quality clear and the color bright.
In some embodiments of the first aspect of the present invention, a protective glass 11 is disposed between the optical filter 10 and the image side, so as to protect the photosensitive chip 9 on the image side from direct damage caused by external force.
According to the video lens provided by the embodiment of the second aspect of the invention, the video lens comprises the lens barrel and the high-definition aerial photographing optical system arranged in the lens barrel, and the large target surface, the low distortion and the high relative illumination of the video lens are realized while the high-definition resolution is obtained by arranging lens combinations with different structures and reasonably distributing the focal power of each lens.
In some embodiments of the present invention, the focal length f=9mm, fno=2.4, fov of 84 °, total length tl= 47.48mm of the optical system of the high-definition aerial lens can be matched with the photosensitive chip for 1″.
The specific parameters of the lens of this embodiment are shown in the following table:
| Face numbering | Radius R | Thickness of (L) | Refractive index Nd | Abbe number Vd |
| Object plane | Infinity | Infinity | - | - |
| *S1 | 12.4177 | 1.000 | 1.6209 | 63.876 |
| *S2 | 5.0354 | 7.702 | - | - |
| S3 | -9.9215 | 1.183 | 1.9229 | 20.882 |
| S4 | -27.7815 | 3.104 | 1.8028 | 46.774 |
| S5 | -11.8108 | 0.097 | - | - |
| S6 | 67.2245 | 2.354 | 1.8467 | 23.787 |
| S7 | -35.8546 | 7.531 | - | - |
| Diaphragm | Infinity | 2.191 | - | - |
| S9 | 10.1248 | 4.746 | 1.4378 | 94.577 |
| S10 | -7.5602 | 1.124 | 1.816 | 46.571 |
| S11 | -10.3897 | 2.558 | - | - |
| S12 | -18.1313 | 1.168 | 1.8052 | 25.477 |
| S13 | 30.9291 | 0.067 | - | - |
| *S14 | 26.4688 | 1.811 | 1.774 | 49.604 |
| *S15 | -33.8897 | 0.500 | - | - |
| S16 | Infinity | 0.300 | 1.5168 | 64.212 |
| S17 | Infinity | 0.200 | - | - |
| S18 | Infinity | 0.400 | 1.5168 | 64.212 |
| S19 | Infinity | 9.449 | - | - |
| S20 | Image plane | - | - | - |
In the table above, the units of radius R, thickness and half caliber are all millimeters; the surface marked "×" indicates an aspherical surface, and the surface shape of the aspherical lens satisfies the following relationship:
Wherein, the parameter c is the curvature corresponding to the radius of the lens, y is a radial coordinate, the unit of the radial coordinate is the same as the unit of the length of the lens, and k is a conic coefficient; when the k coefficient is smaller than-1, the surface type curve of the lens is a hyperbola, and when the k coefficient is equal to-1, the surface type curve of the lens is a parabola; when the k coefficient is between-1 and 0, the surface profile of the lens is elliptical, when the k coefficient is equal to 0, the surface profile of the lens is circular, and when the k coefficient is greater than 0, the surface profile of the lens is flat elliptical; a 1 to a 8 each represent a coefficient corresponding to each radial coordinate. The detailed aspheric related parameters are shown in the following table:
| k | a1 | a2 | a3 | a4 | |
| *S1 | -0.0777 | 0 | -1.6484E-04 | -5.9237E-07 | 2.0502E-09 |
| *S2 | -0.9658 | 0 | 3.7627E-04 | 9.8285E-07 | 3.3751E-08 |
| *S14 | 4.2262 | 0 | -5.0108E-05 | 6.6273E-07 | -6.5885E-09 |
| *S15 | -95.5671 | 0 | 2.5926E-05 | 1.2128E-05 | -2.0893E-07 |
And (5) continuing the table:
| a5 | a6 | a7 | a8 | |
| *S1 | -1.1511E-11 | 0 | 0 | 0 |
| *S2 | -6.3350E-10 | 0 | 0 | 0 |
| *S13 | -4.0351E-09 | 0 | 0 | 0 |
| *S14 | -9.2001E10 | 0 | 0 | 0 |
FIGS. 2 to 5 are graphs showing optical performance of embodiments of the present invention, wherein FIG. 2 is an MTF curve of an optical system for evaluating resolution of the optical system, and it can be seen from the graph that MTF within a 0.9 field of view is greater than 0.2 at 200lp/mm, and the MTF curves on and off axes have excellent resolution and substantially consistent trends; FIG. 3 is a defocused MTF curve of an optical system for analyzing the overall uniformity and sharpness of imaging of light after passing through the system, wherein it can be seen that the optimal image plane coincidence of each field of view is very good, ensuring the imaging consistency of the peripheral field of view and the central field of view, and being applicable to high-pixel chips; FIG. 4 is a distortion curve of an optical system, wherein the distortion is only-2% in the whole field of view, the distortion amount is small, and the imaging picture is ensured to have the deformation amount as small as possible; fig. 5 shows the relative illuminance curve of the optical system, the relative illuminance of the full field is 60%, and the higher relative illuminance ensures uniformity of the overall screen brightness, and no dark corner exists even at the corners of the screen.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A high definition optical system that takes photo by plane, its characterized in that: comprising the following steps from the object side to the image side
A first lens (1) having negative optical power;
A second lens (2) having negative optical power and disposed at a distance from the first lens (1);
a third lens (3) having positive optical power and constituting a cemented lens with the second lens (2);
A fourth lens (4) having positive optical power and disposed at a distance from the third lens (3);
A diaphragm STO which is arranged at a distance from the fourth lens (4) and is used for limiting the aperture of the light beam;
a fifth lens (5) having positive optical power and disposed at a distance from the stop STO;
A sixth lens (6) having negative optical power and constituting a cemented lens with the fifth lens (5);
a seventh lens (7) having negative optical power and disposed at a distance from the sixth lens (6);
an eighth lens (8) having positive optical power and disposed at a distance from the seventh lens (7);
The number of lenses of the Gao Qinghang-piece optical system is 8;
the first lens (1) has a convex surface facing the object side and a concave surface facing the image side;
the second lens (2) has a concave surface facing the object side and a convex surface facing the image side;
The third lens (3) is of a meniscus structure, one surface facing the object side is a concave surface, and one surface facing the image side is a convex surface;
both surfaces of the fourth lens (4) are convex surfaces;
both surfaces of the fifth lens (5) are convex surfaces;
the surface of the sixth lens (6) facing the object side is a concave surface, and the surface facing the image side is a convex surface;
both surfaces of the seventh lens (7) are concave surfaces;
Both surfaces of the eighth lens (8) are convex surfaces;
The Gao Qinghang-beat optical system satisfies the following relation
-3<f1/f<-1；
2<f4/f<4；
Wherein f is the focal length of the Gao Qinghang th beat optical system, f 1 is the focal length of the first lens (1), and f 4 is the focal length of the fourth lens (4).
2. The high definition aerial optical system of claim 1, wherein: the Gao Qinghang-beat optical system satisfies the following relation
-19<f2-3/f<-16；
1<f5-6/f<3；
-3<f7/f<-1；
2<f8/f<4；
3<TL/f<6；
Wherein f 2-3 is the combined focal length of the second lens (2) and the third lens (3), f 5-6 is the combined focal length of the fifth lens (5) and the sixth lens (6), f 7 is the focal length of the seventh lens (7), f 8 is the focal length of the eighth lens (8), and TL is the overall length of the Gao Qinghang-beat optical system.
3. The high definition aerial optical system of claim 1, wherein: the Gao Qinghang-beat optical system satisfies the following relation
Nd1≤1.7;Nd2≥1.8;
Nd3≥1.8; Nd4≥1.8；
|Nd5-Nd6|≥0.3;Nd7≥1.8;
Nd8≤1.8;
Wherein Nd 1 is the refractive index of the first lens (1), nd 2 is the refractive index of the second lens (2), nd 3 is the refractive index of the third lens (3), nd 4 is the refractive index of the fourth lens (4), nd 5 is the refractive index of the fifth lens (5), nd 6 is the refractive index of the sixth lens (6), nd 7 is the refractive index of the seventh lens (7), and Nd 8 is the refractive index of the eighth lens (8).
4. The high definition aerial optical system of claim 1, wherein: the Gao Qinghang-beat optical system satisfies the following relation
Vd1≥50;|Vd2-Vd3|≥25；
Vd4≤30;|Vd5-Vd6|≥40；
Vd7≤30;Vd8≤50；
Wherein Vd 1 is the Abbe number of the first lens (1), vd 2 is the Abbe number of the second lens (2), vd 3 is the Abbe number of the third lens (3), vd 4 is the Abbe number of the fourth lens (4), vd 5 is the Abbe number of the fifth lens (5), vd 6 is the Abbe number of the sixth lens (6), vd 7 is the Abbe number of the seventh lens (7), and Vd 8 is the Abbe number of the eighth lens (8).
5. The high definition aerial optical system of claim 1, wherein: 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) and the eighth lens (8) are all made of glass materials.
6. The high definition aerial optical system of claim 5 wherein: the first lens (1) and the eighth lens (8) are aspheric lenses.
7. The high definition aerial optical system of claim 1, wherein: an optical filter (10) is arranged between the eighth lens (8) and the image side.
8. The high definition aerial optical system of claim 7 wherein: a protective glass (11) is arranged between the optical filter (10) and the image side.
9. A high definition camera lens, its characterized in that: comprising a lens barrel and a high definition aerial optical system as claimed in any one of claims 1 to 8 disposed within the lens barrel.
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| CN104145201B (en) * | 2012-10-02 | 2016-08-24 | 奥林巴斯株式会社 | endoscope objective optical system |
| CN111796405B (en) * | 2019-01-07 | 2022-04-15 | 广东弘景光电科技股份有限公司 | High-pixel wide-angle day and night confocal optical system |
| CN209640588U (en) * | 2019-05-08 | 2019-11-15 | 中山联合光电科技股份有限公司 | A kind of infrared confocal wide-angle lens device |
| CN110888222A (en) * | 2019-11-14 | 2020-03-17 | 舜宇光学(中山)有限公司 | Imaging lens |
| CN111552061B (en) * | 2020-07-01 | 2024-07-02 | 湖南长步道光学科技有限公司 | Projection lens optical system |
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