CN114114616B - High-resolution ultralow-distortion optical system and lens - Google Patents
High-resolution ultralow-distortion optical system and lens Download PDFInfo
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- CN114114616B CN114114616B CN202111286031.4A CN202111286031A CN114114616B CN 114114616 B CN114114616 B CN 114114616B CN 202111286031 A CN202111286031 A CN 202111286031A CN 114114616 B CN114114616 B CN 114114616B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 116
- 238000003384 imaging method Methods 0.000 claims abstract description 8
- 239000006185 dispersion Substances 0.000 claims description 36
- 239000011521 glass Substances 0.000 claims description 9
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Abstract
The invention discloses a high-resolution ultra-low distortion optical system and a lens, wherein the optical system comprises: a first lens having negative optical power; the second lens is provided with positive focal power and is arranged at intervals with the first lens; the third lens is provided with negative focal power and is arranged at intervals with the second lens; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens having positive optical power; a seventh lens having negative optical power; a diaphragm; an eighth lens having negative focal power and disposed at an interval from the diaphragm; a ninth lens having positive optical power; a tenth lens having positive optical power; an eleventh lens having positive optical power; a twelfth lens having positive optical power; a thirteenth lens having negative power; and the photosensitive chip is used for capturing imaging signals and forming images. By arranging lens combinations with different structures and reasonably distributing the focal power of each lens, the low distortion and high relative illuminance of the optical system are realized while the high definition resolution is obtained.
Description
Technical Field
The invention relates to the technical field of optical lenses, in particular to a high-resolution ultralow-distortion optical system and a lens.
Background
The industrial lens has the characteristics of high resolution and good stability, and is widely applied to the machine vision fields of defect detection, size measurement, security monitoring and the like. In order to ensure good imaging effect, the specifications and performance requirements of the lens are very high, the requirements of high-definition resolution capability and smaller picture distortion degree are met, the uniformity of the image plane illuminance is ensured by relatively high relative illuminance, along with the development and production capability improvement of imaging chips, the corresponding requirements on the lens are higher, and the existing lens in the market cannot be matched with the image quality requirement of a new generation chip.
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-resolution ultralow-distortion optical system and a lens, which can solve the problems of low resolution, large distortion and low relative illumination of the existing lens.
According to an embodiment of the first aspect of the present invention, a high-resolution ultra-low distortion optical system includes, in order from an object side to a phase side: a first lens having negative optical power; a second lens having positive optical power and disposed at a distance from the first lens; a third lens having negative optical power and disposed at a distance from the second lens; a fourth lens having negative optical power and disposed at a distance from the third lens; a fifth lens having positive optical power and disposed at a distance from the fourth lens; a sixth lens having positive optical power and disposed at an interval from the fifth lens; a seventh lens having negative optical power and constituting a cemented lens with the sixth lens; a diaphragm disposed at a distance from the seventh lens and configured to limit a beam aperture; an eighth lens having negative optical power and disposed at an interval from the diaphragm; a ninth lens having positive optical power and constituting a cemented lens with the eighth lens; a tenth lens having positive optical power and disposed at an interval from the ninth lens; an eleventh lens having positive optical power and disposed at a distance from the tenth lens; a twelfth lens having positive optical power and disposed at a distance from the eleventh lens; a thirteenth lens having negative optical power and constituting a cemented lens with the twelfth lens; and a photosensitive chip spaced apart from the thirteenth lens for capturing an imaging signal and forming an image.
The high-resolution ultra-low distortion optical system according to the embodiment of the first aspect of the present invention has at least the following advantageous effects: by arranging lens combinations with different structures and reasonably distributing the focal power of each lens, the low distortion and high relative illuminance of the optical system are realized while the high definition resolution is obtained.
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 surface of the second lens facing the object side is a convex surface, and the surface facing the image side is a concave surface; the surface of the third lens facing the object side is a convex surface, and the surface facing the image side is a concave surface; both surfaces of the fourth lens are concave surfaces; both surfaces of the fifth lens are convex surfaces; both surfaces of the sixth lens are convex surfaces; the seventh lens is concave on one surface facing the object side and convex on one surface facing the image side; both surfaces of the eighth lens are concave surfaces; both faces of the ninth lens are convex; both surfaces of the tenth lens are convex; both surfaces of the eleventh lens are convex; both surfaces of the twelfth lens are convex; both faces of the thirteenth lens are concave.
According to some embodiments of the first aspect of the present invention, the high resolution ultra-low distortion optical system satisfies the following relationship
-3.5<f 1 /f<-1.5；
1<f 2 /f<2；
-2<f 3 /f<-1；
-1<f 4 /f<-0.5；
0.5<f 5 /f<1；
2<f 6-7 /f<4；
-2<f 8-9 /f<-1；
1<f 10 /f<2；
1<f 11 /f<2；
-2<f 12-13 /f<-1；
2.5<TL/f<4；
Wherein f is the focal length of the optical system, f 1 F is the focal length of the first lens 2 F is the focal length of the second lens 3 F is the focal length of the third lens 4 F is the focal length of the fourth lens 5 F is the focal length of the fifth lens 6-7 F is the combined focal length of the sixth lens and the seventh lens 8-9 F is the combined focal length of the eighth lens and the ninth lens 10 Focal length of tenth lens, f 11 Focal length of eleventh lens, f 12-13 TL is the total length of the lens optical system for the combined focal length of the twelfth lens and thirteenth lens.
According to some embodiments of the first aspect of the present invention, the high resolution ultra-low distortion optical system satisfies the following relationship
Nd 1 ≥1.6；Nd 2 ≥1.7；
Nd 3 ≤1.7；Nd 4 ≥1.7；
Nd 5 ≥1.6；Nd 6 ≤1.7；
Nd 7 ≥1.7；Nd 8 ≥1.6；
Nd 9 ≤1.6；Nd 10 ≥1.7；
Nd 11 ≥1.7；Nd 12 ≤1.6；Nd 13 ≥1.6；
Wherein Nd 1 For the refractive index of the first lens, nd 2 For the refractive index of the second lens, nd 3 For the refractive index of the third lens, nd 4 For the refractive index of the fourth lens, nd 5 For the refractive index of the fifth lens, nd 6 For the refractive index of the sixth lens, nd 7 For the refractive index of the seventh lens, nd 8 Refractive index of eighth lens, nd 9 Refractive index of the ninth lens, nd 10 Refractive index of tenth lens, nd 11 Refractive index of the eleventh lens, nd 12 Refractive index of twelfth lens, nd 13 Is the refractive index of the thirteenth lens.
According to some embodiments of the first aspect of the present invention, the high resolution ultra-low distortion optical system satisfies the following relationship
Vd 1 ≥40；Vd 2 ≤40；
Vd 3 ≥50；Vd 4 ≤40；
Vd 5 ≤40；Vd 6 ≥50；
Vd 7 ≤40；Vd 8 ≤40；
Vd 9 ≥50；Vd 10 ≤40；
Vd 11 ≤40；Vd 12 ≥50；Vd 13 ≤40；
Wherein Vd is 1 Is the dispersion coefficient, vd, of the first lens 2 Is the dispersion coefficient of the second lens, vd 3 Is the dispersion coefficient of the third lens, vd 4 Is the dispersion coefficient of the fourth lens, vd 5 Is the dispersion coefficient of the fifth lens, vd 6 For the dispersion coefficient, vd, of the sixth lens 7 For the dispersion coefficient, vd, of the seventh lens 8 Is the dispersion coefficient of the eighth lens, vd 9 Is the dispersion coefficient of the ninth lens, vd 10 Is tenth pass throughDispersion coefficient, vd, of mirror 11 Is the dispersion coefficient, vd, of the eleventh lens 12 Is the dispersion coefficient of the twelfth lens, vd 13 Is the abbe number of the thirteenth 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 and the seventh lens are all glass lenses.
According to some embodiments of the first aspect of the present invention, an optical filter is sequentially disposed between the thirteenth lens and the photosensitive chip.
According to some embodiments of the first aspect of the present invention, a protective glass is sequentially disposed between the optical filter and the photosensitive chip.
A high-resolution ultra-low distortion optical lens according to an embodiment of the second aspect of the present invention includes a lens barrel, and the high-resolution ultra-low distortion optical system provided in the lens barrel.
The high-resolution ultra-low distortion optical system according to the embodiment of the second aspect of the present invention has at least the following advantageous effects: by arranging lens combinations with different structures and reasonably distributing the focal power of each lens, the low distortion and high relative illumination are realized while the high definition resolution is obtained.
According to some embodiments of the second aspect of the present invention, a floating focusing mechanism is provided in the lens barrel, and the high resolution ultra-low distortion optical system is mounted on the floating focusing mechanism.
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 diagram of a high resolution ultra low distortion optical system according to an embodiment of the first aspect of the present invention;
FIG. 2 is a graph of MTF for an object distance of infinity according to the first aspect of the present invention;
FIG. 3 is a graph of distortion at infinity for an embodiment of the present invention in accordance with the first aspect of the present invention;
FIG. 4 is a graph of a contrast curve when the object distance is infinity according to an embodiment of the first aspect of the present invention;
FIG. 5 is a graph of MTF for an example of the first aspect of the present invention at an object distance of 300 mm;
FIG. 6 is a graph of distortion at an object distance of 300mm for an embodiment of the first aspect of the present invention;
fig. 7 is a graph of contrast curves for an object at 300mm in accordance with 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 diaphragm STO, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a tenth lens 10, an eleventh lens 11, a twelfth lens 12, a thirteenth lens 13, a photosensitive chip 14, an optical filter 15 and a protective glass 16.
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-resolution ultra-low distortion optical system according to an embodiment of the first aspect of the present invention includes, in order from an object side to a phase side: a first lens 1 having negative optical power; a second lens 2 having positive optical power and disposed at a distance from the first lens 1; a third lens 3 having negative optical power and disposed at a distance from the second lens 2; a fourth lens 4 having negative optical power and disposed at a distance from the third lens 3; a fifth lens 5 having positive optical power and disposed at a distance from the fourth lens 4; a sixth lens 6 having positive optical power and disposed at a distance from the fifth lens 5; a seventh lens 7 having negative optical power and constituting a cemented lens with the sixth lens 6; a stop STO provided at a distance from the seventh lens 7 and for limiting the aperture of the light beam; an eighth lens 8 having negative optical power and disposed at an interval from the stop STO; a ninth lens 9 having positive optical power and constituting a cemented lens with the eighth lens 8; a tenth lens 10 having positive optical power and disposed at a distance from the ninth lens 9; an eleventh lens 11 having positive optical power and disposed at a distance from the tenth lens 10; a twelfth lens 12 having positive optical power and disposed at a distance from the eleventh lens 11; a thirteenth lens 13 having negative optical power and constituting a cemented lens with the twelfth lens 12; a photosensitive chip 14, which is disposed at a distance from the thirteenth lens 13, for capturing an imaging signal and forming an image.
The optical power of each lens has reasonable distribution proportion, takes the diaphragm STO as a limit, is divided into a front group lens and a rear group lens, the front group lens and the rear group lens are positive optical power, and the front three lenses are arranged in a negative positive-negative mode separated at intervals, so that the incident light height can be reduced, off-axis aberration and aberration can be reduced, and meanwhile, smaller spherical aberration and curvature of field can be formed, a good basis is provided for correcting the aberration of the rear group light, correction of system distortion is facilitated, and ultralow picture distortion is realized; after the light passes through the eighth lens 8, the height of the light is increased, the caliber is increased, 4 positive lenses are continuously used for realizing convergence by the rear group, the light height is reduced, and meanwhile, the caliber of the light beam is reduced, so that the spherical aberration of a system is reduced, and the resolution of the system is improved; the rear group lens is far away from the image plane, and the incidence angle of the principal ray on the image plane is small, so that the relative illumination of the system is improved.
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 convex surface facing the object side and a concave surface facing the image side; the third lens 3 has a convex surface facing the object side and a concave surface facing the image side; both surfaces of the fourth lens 4 are concave surfaces; both faces of the fifth lens 5 are convex; both surfaces of the sixth lens 6 are convex; the seventh lens 7 has a concave surface on the object side and a convex surface on the image side; both surfaces of the eighth lens 8 are concave surfaces; both faces of the ninth lens 9 are convex; both faces of the tenth lens 10 are convex; both surfaces of the eleventh lens 11 are convex; both faces of the twelfth lens 12 are convex; both faces of the thirteenth lens 13 are concave. Wherein, the fourth lens 4 and the thirteenth lens 13 are biconcave thick lenses, which is beneficial to the balance of system field curvature; the rear group lens is in a completely symmetrical structure, so that the correction of system coma aberration and vertical axis chromatic aberration is facilitated, the lens resolution capability is improved, the sensitivity of parts is reduced, the yield is improved, and the correction of system distortion is facilitated; the surface of the eighth lens 8, which is close to the diaphragm STO, is bent to the diaphragm surface, so that the angle of incidence of light rays to the surface of the lens is reduced, the spherical aberration and the coma aberration of the system are reduced, and the high-definition resolution is realized.
In some embodiments of the first aspect of the present invention, the high resolution ultra-low distortion optical system satisfies the following relationship
-3.5<f 1 /f<-1.5；
1<f 2 /f<2；
-2<f 3 /f<-1；
-1<f 4 /f<-0.5；
0.5<f 5 /f<1；
2<f 6-7 /f<4；
-2<f 8-9 /f<-1；
1<f 10 /f<2；
1<f 11 /f<2；
-2<f 12-13 /f<-1；
2.5<TL/f<4；
Wherein f is the focal length of the optical system, f 1 F is the focal length of the first lens 1 2 Is the focal length f of the second lens 2 3 F is the focal length of the third lens 3 4 F is the focal length of the fourth lens 4 5 Is the focal length f of the fifth lens 5 6-7 F is the combined focal length of the sixth lens 6 and the seventh lens 7 8-9 F is the combined focal length of the eighth lens 8 and the ninth lens 9 10 F is the focal length of the tenth lens 10 11 Is the focal length f of the eleventh lens 11 12-13 TL is the total length of the lens optical system, which is the combined focal length of the twelfth lens 12 and the thirteenth lens 13.
In some embodiments of the first aspect of the present invention, the high resolution ultra-low distortion optical system satisfies the following relationship
Nd 1 ≥1.6；Nd 2 ≥1.7；
Nd 3 ≤1.7；Nd 4 ≥1.7；
Nd 5 ≥1.6；Nd 6 ≤1.7；
Nd 7 ≥1.7；Nd 8 ≥1.6；
Nd 9 ≤1.6；Nd 10 ≥1.7；
Nd 11 ≥1.7；Nd 12 ≤1.6；Nd 13 ≥1.6；
Wherein Nd 1 For the refractive index of the first lens 1, nd 2 For the refractive index of the second lens 2, nd 3 For the refractive index of the third lens 3, nd 4 For the refractive index of the fourth lens 4, nd 5 For the refractive index of the fifth lens 5, nd 6 For the refractive index of the sixth lens 6, nd 7 For the refractive index of the seventh lens 7, nd 8 For the refractive index of the eighth lens 8, nd 9 For the refractive index of the ninth lens 9, nd 10 Nd for refractive index of tenth lens 10 11 Nd for the refractive index of the eleventh lens 11 12 Nd for refractive index of twelfth lens 12 13 Is the refractive index of the thirteenth lens 13.
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 resolution of the optical system and obtaining a high-definition image.
In some embodiments of the first aspect of the present invention, the high resolution ultra-low distortion optical system satisfies the following relationship
Vd 1 ≥40；Vd 2 ≤40；
Vd 3 ≥50；Vd 4 ≤40；
Vd 5 ≤40；Vd 6 ≥50；
Vd 7 ≤40；Vd 8 ≤40；
Vd 9 ≥50；Vd 10 ≤40；
Vd 11 ≤40；Vd 12 ≥50；Vd 13 ≤40；
Wherein Vd is 1 For the dispersion coefficient, vd, of the first lens 1 2 Is the dispersion coefficient, vd, of the second lens 2 3 Is the dispersion coefficient, vd, of the third lens 3 4 For the dispersion coefficient, vd, of the fourth lens 4 5 For the dispersion coefficient, vd, of the fifth lens 5 6 For the dispersion coefficient, vd, of the sixth lens 6 7 For the dispersion coefficient, vd, of the seventh lens 7 8 For the dispersion coefficient of the eighth lens 8, vd 9 For the dispersion coefficient, vd, of the ninth lens 9 10 Is the dispersion coefficient Vd of the tenth lens 10 11 Is the dispersion coefficient Vd of the eleventh lens 11 12 Vd13 is the abbe number of the twelfth lens 12, and Vd13 is the abbe number of the thirteenth lens 13. Three bonding lens groups are used in the whole system, high-low dispersion materials are matched with each other, chromatic aberration of the system is corrected, and the lens resolving power is further improved.
In some embodiments of the first aspect of the present invention, all of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6 and the seventh lens 7 are glass lenses. The glass material with relatively high refractive index is used, the bending degree of the lens surface is reduced, the first lens 1 and the second lens 2 are made of high refractive index materials, the light height is reduced rapidly, meanwhile, a proper shape is kept, smaller field curvature and spherical aberration are generated, the image quality is improved, and the processing is easy; the fourth lens 4 and the fifth lens 5 use a high refractive index material and have similar functions.
In some embodiments of the first aspect of the present invention, a light filter 15 is sequentially disposed between the thirteenth lens 13 and the photosensitive chip 14, where the light filter 15 can filter a part of long waves and stray light, and prevent the photosensitive chip from being interfered by infrared rays, so that the image quality is clear and the color is bright.
In some embodiments of the first aspect of the present invention, a protective glass 16 is disposed between the optical filter 15 and the photosensitive chip 14 in sequence, where the protective glass 16 can protect the photosensitive chip 14 from direct damage caused by external force.
In some embodiments of the present invention, by setting vignetting as few as possible, light rays of a peripheral field of view reach the surface of the photosensitive chip through the lens as much as possible, so that the lens obtains higher relative illuminance, and the overall uniformity and permeability of the brightness of the image plane are ensured.
In some embodiments of the present invention, the design wavelength band of the low distortion optical system is 435-656 nm, and when the object distance is infinity, the focal length f=25 mm, fno=2.8, fov is 49.8 °, the total length tl=88 mm of the optical system can be matched with 1.4″ at maximum.
The specific parameters of the lens of this embodiment are shown in the following table 1:
TABLE 1
In table 1 above, the units of radius R and thickness are millimeters;
a high-resolution ultra-low distortion optical lens according to an embodiment of the second aspect of the present invention includes a lens barrel, and the high-resolution ultra-low distortion optical system provided in the lens barrel. By arranging lens combinations with different structures and reasonably distributing the focal power of each lens, the low distortion and high relative illumination are realized while the high definition resolution is obtained.
In some embodiments of the second aspect of the present invention, a floating focus mechanism is provided within the barrel, and the high resolution ultra-low distortion optical system is mounted on the floating focus mechanism. In order to realize clear imaging of different working distances, an optical system is adjusted in a floating focusing mode, in the system, the system is divided into a front group and a rear group from a diaphragm position, and focusing is realized by adjusting the interval between the two groups and the length of a rear focus. Specific adjustment amounts are shown in table 2 below:
| object distance (mm) | 150 | 300 | 500 | 1000 | 5000 | Infinity |
| Diaphragm spacing (mm) | 3.565 | 4.225 | 4.537 | 4.799 | 5.021 | 5.096 |
| S28(mm) | 14.545 | 12.609 | 11.792 | 11.161 | 10.645 | 10.513 |
TABLE 2
FIGS. 2 to 4 are graphs showing optical performance at an infinite object distance according to an embodiment 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 of all fields of view is greater than 0.3 at 200lp/mm, and the MTF curves on and off axes have excellent resolution and substantially consistent trends; FIG. 3 is a distortion curve of an optical system, wherein the maximum optical distortion of the whole field of view is only-0.25%, the distortion amount is very small, and the authenticity of an imaging picture can be ensured; fig. 4 shows the relative illuminance curve of the optical system, the relative illuminance of the full field is 70%, and the high relative illuminance ensures uniformity of the overall brightness distribution of the picture, and even at the corners of the picture, the difference between the brightness and the center brightness is very small. In addition, as a comparison, optical performance diagrams of the embodiment at an object distance of 300mm are also provided, as shown in fig. 5 to 7.
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 (10)
1. A high resolution ultra low distortion optical system, characterized by: comprising sequentially arranged from an object side to a phase side
A first lens (1) having negative optical power;
a second lens (2) having positive optical power and disposed at a distance from the first lens (1);
a third lens (3) having negative optical power and disposed at a distance from the second lens (2);
a fourth lens (4) having negative optical power and disposed at a distance from the third lens (3);
a fifth lens (5) having positive optical power and disposed at a distance from the fourth lens (4);
a sixth lens (6) having positive optical power and disposed at a distance from the fifth lens (5);
a seventh lens (7) having negative optical power and constituting a cemented lens with the sixth lens (6);
a diaphragm (STO) which is arranged at a distance from the seventh lens (7) and which limits the beam aperture;
an eighth lens (8) having negative optical power and disposed at an interval from the Stop (STO);
a ninth lens (9) having positive optical power and constituting a cemented lens with the eighth lens (8);
a tenth lens (10) having positive optical power and disposed at a distance from the ninth lens (9);
an eleventh lens (11) having positive optical power and disposed at a distance from the tenth lens (10);
a twelfth lens (12) having positive optical power and disposed at a distance from the eleventh lens (11);
a thirteenth lens (13) having negative optical power and constituting a cemented lens with the twelfth lens (12);
a photosensitive chip (14) disposed at a distance from the thirteenth lens (13) for capturing an imaging signal and forming an image.
2. The high resolution ultra low distortion optical system according to claim 1, wherein: the first lens (1) has a convex surface facing the object side and a concave surface facing the image side; the surface of the second lens (2) facing the object side is a convex surface, and the surface facing the image side is a concave surface; the surface of the third lens (3) facing the object side is a convex surface, and the surface facing the image side is a concave surface; both surfaces of the fourth lens (4) are concave surfaces; both surfaces of the fifth lens (5) are convex surfaces; both surfaces of the sixth lens (6) are convex surfaces; the surface of the seventh lens (7) facing the object side is a concave surface, and the surface facing the image side is a convex surface; both surfaces of the eighth lens (8) are concave surfaces; both surfaces of the ninth lens (9) are convex surfaces; both surfaces of the tenth lens (10) are convex; both surfaces of the eleventh lens (11) are convex surfaces; both surfaces of the twelfth lens (12) are convex surfaces; both faces of the thirteenth lens (13) are concave.
3. The high-resolution ultra-low distortion optical system according to claim 1 or 2, characterized in that: the high resolution ultra-low distortion optical system satisfies the following relation
-3.5<f 1 /f<-1.5；
1<f 2 /f<2；
-2<f 3 /f<-1；
-1<f 4 /f<-0.5；
0.5<f 5 /f<1；
2<f 6-7 /f<4；
-2<f 8-9 /f<-1；
1<f 10 /f<2；
1<f 11 /f<2；
-2<f 12-13 /f<-1；
2.5<TL/f<4；
Wherein f is the focal length of the optical system, f 1 Is the focal length f of the first lens (1) 2 Is the focal length f of the second lens (2) 3 Is the focal length f of the third lens (3) 4 Is the focal length f of the fourth lens (4) 5 Is the focal length f of the fifth lens (5) 6-7 Is the combined focal length of the sixth lens (6) and the seventh lens (7), f 8-9 Is the combined focal length of the eighth lens (8) and the ninth lens (9), f 10 Is the focal length f of the tenth lens (10) 11 Is the focal length f of the eleventh lens (11) 12-13 TL is the overall length of the optical system, being the combined focal length of the twelfth lens (12) and the thirteenth lens (13).
4. The high-resolution ultra-low distortion optical system according to claim 1 or 2, characterized in that: the high resolution ultra-low distortion optical system satisfies the following relation
Nd 1 ≥1.6；Nd 2 ≥1.7；
Nd 3 ≤1.7；Nd 4 ≥1.7；
Nd 5 ≥1.6；Nd 6 ≤1.7；
Nd 7 ≥1.7；Nd 8 ≥1.6；
Nd 9 ≤1.6；Nd 10 ≥1.7；
Nd 11 ≥1.7；Nd 12 ≤1.6；Nd 13 ≥1.6；
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 For the refractive index of the seventh lens (7), nd 8 A refractive index of the eighth lens (8), nd 9 A refractive index Nd of the ninth lens (9) 10 Is the refractive index of the tenth lens (10), nd 11 Is the refractive index of the eleventh lens (11), nd 12 Is the refraction of the twelfth lens (12)Rate, nd 13 Is the refractive index of the thirteenth lens (13).
5. The high-resolution ultra-low distortion optical system according to claim 1 or 2, characterized in that: the high resolution ultra-low distortion optical system satisfies the following relation
Vd 1 ≥40；Vd 2 ≤40；
Vd 3 ≥50；Vd 4 ≤40；
Vd 5 ≤40；Vd 6 ≥50；
Vd 7 ≤40；Vd 8 ≤40；
Vd 9 ≥50；Vd 10 ≤40；
Vd 11 ≤40；Vd 12 ≥50；Vd 13 ≤40；
Wherein Vd is 1 Is the dispersion coefficient, vd, of the first lens (1) 2 Is the dispersion coefficient, vd, of the second lens (2) 3 Is the dispersion coefficient, vd, of the third lens (3) 4 Is the dispersion coefficient, vd, of the fourth lens (4) 5 Is the dispersion coefficient, vd, of the fifth lens (5) 6 Is the dispersion coefficient, vd, of the sixth lens (6) 7 Is the dispersion coefficient, vd, of the seventh lens (7) 8 Is the dispersion coefficient, vd, of the eighth lens (8) 9 Is the dispersion coefficient, vd, of the ninth lens (9) 10 Is the dispersion coefficient, vd, of the tenth lens (10) 11 Is the dispersion coefficient, vd, of the eleventh lens (11) 12 Is the dispersion coefficient, vd, of the twelfth lens (12) 13 Is the dispersion coefficient of the thirteenth lens (13).
6. The high-resolution ultra-low distortion optical system according to claim 1 or 2, characterized in that: the first lens (1), the second lens (2), the third lens (3), the fourth lens (4), the fifth lens (5), the sixth lens (6) and the seventh lens (7) are all made of glass lenses.
7. The high resolution ultra low distortion optical system according to claim 1, wherein: an optical filter (15) is sequentially arranged between the thirteenth lens (13) and the photosensitive chip (14).
8. The high resolution ultra low distortion optical system according to claim 7, wherein: and a protective glass (16) is sequentially arranged between the optical filter (15) and the photosensitive chip (14).
9. A high resolution ultra low distortion optical lens, characterized by: comprising a lens barrel, and the high-resolution ultra-low distortion optical system according to any one of claims 1 to 8 disposed within the lens barrel.
10. The high resolution ultra low distortion optical lens of claim 9, wherein: a floating focusing mechanism is arranged in the lens barrel, and the high-resolution ultra-low distortion optical system is arranged on the floating focusing mechanism.
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| CN101153954A (en) * | 2006-09-29 | 2008-04-02 | 佳能株式会社 | Zoom lens and image pickup apparatus including the same |
| JP2010175899A (en) * | 2009-01-30 | 2010-08-12 | Nikon Corp | Variable power optical system, optical device including the variable power optical system, and method for manufacturing the variable power optical system |
| CN105403983A (en) * | 2014-09-05 | 2016-03-16 | 三星电子株式会社 | Inner Focusing Telephoto Lens System And Photographing Apparatus Including The Same |
| CN108563003A (en) * | 2018-07-03 | 2018-09-21 | 嘉兴中润光学科技有限公司 | telecentric lens |
| CN208569170U (en) * | 2018-07-03 | 2019-03-01 | 嘉兴中润光学科技有限公司 | Telecentric lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6230933B2 (en) * | 2014-02-28 | 2017-11-15 | 富士フイルム株式会社 | Macro lens and imaging device |
| JP6266497B2 (en) * | 2014-11-25 | 2018-01-24 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153954A (en) * | 2006-09-29 | 2008-04-02 | 佳能株式会社 | Zoom lens and image pickup apparatus including the same |
| JP2010175899A (en) * | 2009-01-30 | 2010-08-12 | Nikon Corp | Variable power optical system, optical device including the variable power optical system, and method for manufacturing the variable power optical system |
| CN105403983A (en) * | 2014-09-05 | 2016-03-16 | 三星电子株式会社 | Inner Focusing Telephoto Lens System And Photographing Apparatus Including The Same |
| CN108563003A (en) * | 2018-07-03 | 2018-09-21 | 嘉兴中润光学科技有限公司 | telecentric lens |
| CN208569170U (en) * | 2018-07-03 | 2019-03-01 | 嘉兴中润光学科技有限公司 | Telecentric lens |
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