CN114114613A - Ultralow distortion optical system and industrial lens - Google Patents
Ultralow distortion optical system and industrial lens Download PDFInfo
- Publication number
- CN114114613A CN114114613A CN202111285872.3A CN202111285872A CN114114613A CN 114114613 A CN114114613 A CN 114114613A CN 202111285872 A CN202111285872 A CN 202111285872A CN 114114613 A CN114114613 A CN 114114613A
- Authority
- CN
- China
- Prior art keywords
- lens
- optical system
- refractive index
- abbe number
- ultra
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention discloses an ultra-low distortion optical system and an industrial lens, wherein the optical system comprises: a first lens having a negative focal power; the second lens has positive focal power and is arranged at an interval with the first lens; a third lens having negative focal power and spaced from the second lens; a fourth lens having a negative focal power; a fifth lens having a positive refractive power; a sixth lens having a positive refractive power; a seventh lens having a negative power; a diaphragm; the eighth lens has negative focal power and is arranged at an interval with the diaphragm; a ninth lens having positive optical power; a tenth lens having positive optical power; an eleventh lens having a positive refractive power; a twelfth lens having a negative optical power; a thirteenth lens having positive optical power; a fourteenth lens having a negative power; a photosensitive chip; by arranging lens combinations with different structures and reasonably distributing focal power of each lens, high resolution is obtained, and simultaneously low distortion and high relative illumination of the optical system are realized.
Description
Technical Field
The invention relates to the technical field of optical lenses, in particular to an ultralow-distortion optical system and an industrial lens.
Background
The industrial lens has the characteristics of high resolution and good stability, and the product is widely applied to the fields of defect detection, size measurement, security monitoring and the like. In order to achieve a good imaging effect, the specification and performance requirements of such lenses are very high, high resolution capability is required to be achieved, the degree of image distortion is small, high relative illumination is required, and uniformity of image plane illumination is guaranteed.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an ultra-low distortion optical system and an industrial lens, which can solve the problems of low resolution, large distortion and low relative illumination of the conventional lens.
An ultra-low distortion optical system according to an embodiment of the first aspect of the present invention includes, arranged in order from an object side to a phase side: a first lens having a negative optical power; a second lens having positive refractive power and disposed at an interval from the first lens; a third lens having a negative focal power and disposed at an interval from the second lens; a fourth lens having a negative focal power and disposed at an interval from the third lens; a fifth lens having positive refractive power and disposed at an interval from the fourth lens; a sixth lens having positive refractive power and disposed at a distance from the fifth lens; a seventh lens having a negative refractive power and constituting a cemented lens with the sixth lens; the diaphragm is arranged at a distance from the seventh lens and used for limiting the aperture of the light beam; an eighth lens having a negative focal power and disposed at an interval from the diaphragm; a ninth lens having positive refractive power and constituting a cemented lens with the eighth lens; a tenth lens having positive refractive power and disposed apart from the ninth lens; an eleventh lens having positive optical power and disposed at a distance from the tenth lens; a twelfth lens having a negative refractive power and constituting a cemented lens with the eleventh lens; a thirteenth lens having positive optical power and disposed apart from the twelfth lens; a fourteenth lens having a negative refractive power and disposed apart from the thirteenth lens; and the photosensitive chip is arranged at a distance from the fourteenth lens and is used for capturing an imaging signal and forming an image.
The ultra-low distortion optical system according to the embodiment of the first aspect of the invention has at least the following beneficial effects: by arranging lens combinations with different structures and reasonably distributing focal power of each lens, high resolution is obtained, and simultaneously low distortion and high relative illumination of the optical system are realized.
According to some embodiments of the first aspect of the present disclosure, a surface of the first lens element facing the object side is convex, and a surface of the first lens element facing the image side is concave; both surfaces of the second lens are convex surfaces; one surface of the third lens, facing the object side, is a convex surface, and one surface of the third lens, facing the image side, is a concave surface; one surface of the fourth lens, facing the object side, is a concave surface, and one surface of the fourth lens, facing the image side, is a convex surface; both surfaces of the fifth lens are convex surfaces; one surface of the sixth lens element, which faces the object side, is a concave surface, and one surface of the sixth lens element, which faces the image side, is a convex surface; one surface of the seventh lens element facing the object side is a concave surface, and the other surface of the seventh lens element facing the image side is a convex surface; both surfaces of the eighth lens are concave surfaces; both surfaces of the ninth lens are convex surfaces; both surfaces of the tenth lens are convex surfaces; both surfaces of the eleventh lens are convex surfaces; both surfaces of the twelfth lens are concave surfaces; the thirteenth lens element is a convex lens element, and the fourteenth lens element has a concave surface facing the object side and a convex surface facing the image side.
According to some embodiments of the first aspect of the present invention, the ultra-low distortion optical system satisfies the following relation
-2<f1/f<-1；
0.5<f2/f<1.5；
-2<f3/f<-1；
-2<f4/f<-1；
0.5<f5/f<1；
-6<f6-7/f<-2；
-2<f8-9/f<-1；
1<f10/f<2；
5<f11-12/f<9；
0.5<f13/f<1.5；
-1.5<f14/f<-0.5；
2.5<TL/f<4；
Wherein the content of the first and second substances,f is the focal length of the optical system, f1Is the focal length of the first lens, f2Is the focal length of the second lens, f3Is the focal length of the third lens, f4Is the focal length of the fourth lens, f5Is the focal length of the fifth lens, f6-7Is the combined focal length of the sixth lens and the seventh lens, f8-9Is the combined focal length of the eighth lens and the ninth lens, f10Is the focal length of the tenth lens, f11-12Is the combined focal length of the eleventh lens and the twelfth lens, f13Is the focal length of the thirteenth lens, f14TL is the total length of the optical system of the lens, which is the focal length of the fourteenth lens.
According to some embodiments of the first aspect of the present invention, the ultra-low distortion optical system satisfies the following relation
Nd1≥1.6；Nd2≥1.7；
Nd3≤1.6；Nd4≥1.6；
Nd5≥1.6；Nd6≤1.8；
Nd7≥1.6；Nd8≥1.6；
Nd9≤1.7；Nd10≤1.6；
Nd11≥1.8；Nd12≤1.7；
Nd13≥1.6；Nd14≥1.7；
Wherein, Nd1Is the refractive index of the first lens, Nd2Refractive index of the second lens, Nd3Refractive index of the third lens, Nd4Refractive index of the fourth lens, Nd5Refractive index of fifth lens, Nd6Refractive index of sixth lens, Nd7Refractive index of seventh lens, Nd8Refractive index of the eighth lens, Nd9Refractive index of ninth lens, Nd10Refractive index of tenth lens, Nd11Refractive index of the eleventh lens, Nd12Refractive index of the twelfth lens, Nd13Refractive index of thirteenth lens, Nd14Is the refractive index of the fourteenth lens.
According to some embodiments of the first aspect of the present invention, the ultra-low distortion optical system satisfies the following relation
Vd1≥40；Vd2≤40；
Vd3≥50；Vd4≤40；
Vd5≤50；Vd6≥40；
Vd7≤40；Vd8≤40；
Vd9≥50；Vd10≥50；
Vd11≤40；Vd12≤40；
Vd13≥30；Vd14≤40；
Wherein, Vd1Is the Abbe number of the first lens, Vd2Is the Abbe number of the second lens, Vd3Is the Abbe number of the third lens, Vd4Is the Abbe number of the fourth lens, Vd5Is the Abbe number, Vd, of the fifth lens6Is the Abbe number, Vd, of the sixth lens7Is the Abbe number, Vd, of the seventh lens8Is the Abbe number, Vd, of the eighth lens9Is the Abbe number, Vd, of the ninth lens10Is the Abbe number, Vd, of the tenth lens11Is the Abbe number, Vd, of the eleventh lens12Is the Abbe number, Vd, of the twelfth lens13Is the Abbe number, Vd, of the thirteenth lens14The abbe number of the fourteenth 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 made of glass.
According to some embodiments of the first aspect of the present disclosure, an optical filter is disposed between the thirteenth lens and the photosensitive chip in sequence.
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.
An industrial lens according to an embodiment of the second aspect of the present invention includes a lens barrel, and the ultra-low distortion optical system disposed in the lens barrel.
The ultra-low distortion optical system according to the embodiment of the second aspect of the invention has at least the following advantages: by arranging the lens combinations with different structures and reasonably distributing the focal power of each lens, high resolution is obtained, and low distortion and high relative illumination are realized.
According to some embodiments of the second aspect of the present invention, a floating focusing mechanism is disposed in the lens barrel, and the 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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an ultra-low distortion optical system according to an embodiment of a first aspect of the present invention;
FIG. 2 is a graph of MTF at an object distance of infinity according to an embodiment of the first aspect of the present invention;
FIG. 3 is a plot of distortion at object distance of infinity for an embodiment of the first aspect of the present invention;
FIG. 4 is a graph of the relative distance curve for an embodiment of the first aspect of the present invention at infinity;
FIG. 5 is a graph of the MTF at an object distance of 300mm for an embodiment of the first aspect of the present invention;
FIG. 6 is a graph of the distortion curve for an object distance of 300mm in an embodiment of the first aspect of the present invention;
fig. 7 is a graph of the relative distance at 300mm for an embodiment of the first aspect of the present invention.
Reference numerals:
the lens system 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 fourteenth lens 14, a light-sensing chip 15, a filter 16 and a protective glass 17.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, an ultra-low distortion optical system according to an embodiment of the first aspect of the present invention includes, sequentially from an object side to a phase side: a first lens 1 having a negative power; a second lens 2 having a positive refractive power and disposed at a distance from the first lens 1; a third lens 3 having a negative refractive power and disposed at a distance from the second lens 2; a fourth lens 4 having a negative refractive power and disposed at a distance from the third lens 3; a fifth lens 5 having a positive refractive power and disposed at a distance from the fourth lens 4; a sixth lens 6 having a positive refractive power and disposed at a distance from the fifth lens 5; a seventh lens 7 having a negative power and constituting a cemented lens with the sixth lens 6; a stop STO provided at a distance from the seventh lens 7 and limiting the beam aperture; an eighth lens 8 having a negative power and disposed at a distance from the stop STO; a ninth lens 9 having positive refractive power and constituting a cemented lens with the eighth lens 8; a tenth lens 10 having positive refractive power and disposed apart from the ninth lens 9; an eleventh lens 11 having positive refractive power and disposed apart from the tenth lens 10; a twelfth lens 12 having a negative power and constituting a cemented lens with the eleventh lens 11; a thirteenth lens 13 having positive refractive power and disposed apart from the twelfth lens 12; a fourteenth lens 14 having a negative refractive power and disposed at a distance from the thirteenth lens 13; and a light sensing chip 15 disposed apart from the fourteenth lens 14 for capturing an imaging signal and forming an image.
The focal power of each lens of the embodiment has a reasonable distribution proportion, the lenses are divided into a front group lens and a rear group lens by taking a diaphragm STO as a boundary, the front group lens and the rear group lens are both positive focal power, and the front three lenses are arranged in a negative-positive-negative mode separated at intervals, so that the height of incident light rays can be reduced, off-axis aberration is reduced, smaller spherical aberration is formed, a good basis is provided for correcting the aberration of the rear group light rays, the system distortion can be corrected conveniently, and ultra-low picture distortion is realized; the first lens 1 and the second lens 2 are separated by a certain distance, and the structural form is favorable for correcting curvature of field; after the light passes through the eighth lens 8, the height of the light is increased, the aperture is increased, the rear group continuously uses 3 positive lenses to realize convergence, the light height is reduced, the aperture of the light beam is reduced, the spherical aberration of the system is favorably reduced, and the resolution of the system is improved; the rear group of lenses is far away from the image surface, and the incident angle of the chief ray on the image surface is small, so that the relative illumination of the system is favorably improved.
In some embodiments of the first aspect of the present disclosure, a surface of the first lens element 1 facing an object side is a convex surface, and a surface facing an image side is a concave surface; both surfaces of the second lens 2 are convex surfaces; one surface of the third lens element 3 facing the object side is a convex surface, and the other surface facing the image side is a concave surface; one surface of the fourth lens element 4 facing the object side is a concave surface, and one surface facing the image side is a convex surface; both surfaces of the fifth lens 5 are convex surfaces; one surface of the sixth lens element 6 facing the object side is a concave surface, and one surface facing the image side is a convex surface; one surface of the seventh lens element 7 facing the object side is a concave surface, and one 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 faces of the tenth lens 10 are convex; both surfaces of the eleventh lens 11 are convex surfaces; both surfaces of the twelfth lens element 12 are concave; both surfaces of the thirteenth lens element 13 are convex, and one surface of the fourteenth lens element 14 facing the object side is concave and the other surface facing the image side is convex. The eighth lens 8 to the twelfth lens 12 of the rear group form a completely symmetrical structure, which is beneficial to the correction of the coma aberration and the vertical axis chromatic aberration of the system, is beneficial to improving the resolution capability of the lens, and simultaneously is beneficial to reducing the sensitivity of parts, improving the yield and correcting the distortion of the system; the surface of the eighth lens 8 close to the diaphragm is bent to the diaphragm surface, so that the angle of light rays incident to the surface of the lens is favorably reduced, the spherical aberration and the coma aberration of the system are favorably reduced, and high resolution capability is realized; the thirteenth lens 13 is a biconcave thick lens, which facilitates the balance of the curvature of field of the system.
In some embodiments of the first aspect of the present invention, the ultra-low distortion optical system satisfies the following relation
-2<f1/f<-1；
0.5<f2/f<1.5；
-2<f3/f<-1；
-2<f4/f<-1；
0.5<f5/f<1；
-6<f6-7/f<-2；
-2<f8-9/f<-1；
1<f10/f<2；
5<f11-12/f<9；
0.5<f13/f<1.5；
-1.5<f14/f<-0.5；
2.5<TL/f<4；
Wherein f is the focal length of the optical system, f1Is the focal length of the first lens 1, f2Is the focal length of the second lens 2, f3Is the focal length of the third lens 3, f4Is the focal length of the fourth lens 4, f5Is the focal length of the fifth lens 5, f6-7Is the combined focal length of the sixth lens 6 and the seventh lens 7, f8-9Is the eighth best modeCombined focal length of mirror 8 and ninth lens 9, f10Is the focal length of the tenth lens 10, f11-12Is the combined focal length of the eleventh lens 11 and the twelfth lens 12, f13Is the focal length of the thirteenth lens 13, f14TL is the total length of the lens optical system, which is the focal length of the fourteenth lens 14.
In some embodiments of the first aspect of the present invention, the ultra-low distortion optical system satisfies the following relation
Nd1≥1.6；Nd2≥1.7；
Nd3≤1.6；Nd4≥1.6；
Nd5≥1.6；Nd6≤1.8；
Nd7≥1.6；Nd8≥1.6；
Nd9≤1.7；Nd10≤1.6；
Nd11≥1.8；Nd12≤1.7；
Nd13≥1.6；Nd14≥1.7；
Wherein, Nd1Is the refractive index of the first lens 1, Nd2Is the refractive index of the second lens 2, Nd3Refractive index of the third lens 3, Nd4Refractive index of the fourth lens 4, Nd5Refractive index of the fifth lens 5, Nd6Refractive index of the sixth lens 6, Nd7Refractive index of the seventh lens 7, Nd8Refractive index of the eighth lens 8, Nd9Refractive index of the ninth lens 9, Nd10Refractive index of the tenth lens 10, Nd11Refractive index of the eleventh lens 11, Nd12Refractive index of the twelfth lens 12, Nd13Refractive index of the thirteenth lens 13, Nd14Is the refractive index of the fourteenth lens 14.
In the embodiment, the lens combination structure meeting the refractive index relationship is beneficial to realizing reasonable distribution of focal power, and spherical aberration, coma aberration and field curvature can be well balanced, so that the resolving power of an optical system is improved, and a high-definition image is obtained; the front group of lenses are made of glass materials with relatively high refractive indexes, so that the surface bending degree of the lenses is reduced, the first lens 1 and the second lens 2 are made of high-refractive-index materials, the light ray height is quickly reduced, meanwhile, the proper shapes are kept, smaller field curvature and spherical aberration are generated, the image quality is favorably improved, and the processing is easy; the fourth lens 4 and the fifth lens 5 are made of high refractive index materials and have similar functions.
In some embodiments of the first aspect of the present invention, the ultra-low distortion optical system satisfies the following relation
Vd1≥40；Vd2≤40；
Vd3≥50；Vd4≤40；
Vd5≤50；Vd6≥40；
Vd7≤40；Vd8≤40；
Vd9≥50；Vd10≥50；
Vd11≤40；Vd12≤40；
Vd13≥30；Vd14≤40；
Wherein, Vd1Is the Abbe number, Vd, of the first lens 12Is the Abbe number, Vd, of the second lens 23Is the Abbe number, Vd, of the third lens 34Is the Abbe number, Vd, of the fourth lens 45Is the Abbe number, Vd, of the fifth lens 56Is the Abbe number, Vd, of the sixth lens 67Is the Abbe number, Vd, of the seventh lens 78Is the Abbe number, Vd, of the eighth lens 89Is the Abbe number, Vd, of the ninth lens 910Is an Abbe number, Vd, of the tenth lens 1011Is an Abbe number, Vd, of the eleventh lens 1112Is an Abbe number, Vd, of the twelfth lens 1213Vd14 is the abbe number of the thirteenth lens 13, and the abbe number of the fourteenth lens 14. The three bonded lens groups are used in the whole system, for the first two bonded lens groups, high-low dispersion materials are matched with each other, chromatic aberration of the system is corrected, the resolving power of a lens is improved, dispersion coefficients of two lenses of the third bonded lens are close, refractive indexes are greatly different, the combination can correct spherical aberration and field curvature of the system to a certain extent, and the resolving power is further improved.
In some embodiments of the invention, peripheral field light reaches the surface of the photosensitive chip through the lens as much as possible by arranging vignetting as little as possible, so that the lens obtains higher relative illumination and the integral uniformity and permeability of image surface brightness are ensured.
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, and the seventh lens 7 are all made of glass.
In some embodiments of the first aspect of the present invention, an optical filter 16 is sequentially disposed between the fourteenth lens 14 and the light-sensing chip 15, and the optical filter 16 can filter a part of the long wave and the stray light, so as to prevent the light-sensing chip from being interfered by the infrared rays, so that the image quality of the image is clear and the color is bright.
In some embodiments of the first aspect of the present invention, a protective glass 17 is sequentially disposed between the optical filter 16 and the photo sensor chip 15, and the protective glass 17 can protect the photo sensor chip 15 from direct damage caused by an external force.
In some embodiments of the present invention, the design wavelength band of the low distortion optical system is 435-656 nm, when the object distance is infinite, the system focal length f is 25mm, FNO is 2.4, FOV is 49.8 °, the total length TL of the optical system is 87.5mm, and the maximum optical system can be matched with a 1.4 ″ photosensitive chip.
The specific parameters of the lens in this embodiment are shown in table 1 below:
TABLE 1
In table 1 above, the radius R and thickness are both in millimeters;
an industrial lens according to an embodiment of the second aspect of the present invention includes a lens barrel, and the ultra-low distortion optical system disposed in the lens barrel. By arranging the lens combinations with different structures and reasonably distributing the focal power of each lens, high resolution is obtained, and low distortion and high relative illumination are realized.
In some embodiments of the second aspect of the present invention, a floating focusing mechanism is disposed within the lens barrel, and the ultra-low distortion optical system is mounted on the floating focusing mechanism. In order to realize clear imaging of different working distances, an optical system is adjusted in a floating focusing mode. The specific adjustment amounts are shown in table 2 below:
| object distance (mm) | 150 | 300 | 600 | 1000 | 5000 | Infinity |
| Diaphragm interval (mm) | 3.432 | 4.271 | 4.861 | 5.136 | 5.491 | 5.607 |
| S30(mm) | 10.994 | 8.991 | 7.925 | 7.481 | 6.933 | 6.794 |
TABLE 2
FIGS. 2 to 4 are graphs of optical performance of an embodiment of the present invention at an infinite object distance, wherein FIG. 2 is an MTF curve of an optical system for evaluating a resolving power of the optical system, and it can be seen from the graphs that MTFs of all fields are greater than 0.3 at 200lp/mm, the field has an excellent resolving power, and the trends of the on-axis MTFs and the off-axis MTFs are substantially consistent; FIG. 3 is a distortion curve of the optical system, the maximum optical distortion of the full view field is only-0.15%, the distortion is very small, and the authenticity of the imaging picture can be ensured; fig. 4 is a relative illumination curve of the optical system, where the full-field relative illumination is 68%, and the high relative illumination can ensure the uniformity of the overall brightness distribution of the image, and the brightness difference between the center and the brightness of the image is very small even at the corners of the image. In addition, as a comparison, an optical performance diagram of the embodiment at an object distance of 300mm is provided, as shown in fig. 5 to 7.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An ultra-low distortion optical system, comprising: comprising, arranged in sequence from the object side to the phase side
A first lens (1) having a negative optical power;
a second lens (2) having a positive refractive power and disposed at a distance from the first lens (1);
a third lens (3) having a negative refractive power and disposed at a distance from the second lens (2);
a fourth lens (4) having a negative refractive power and disposed at a distance from the third lens (3);
a fifth lens (5) having positive refractive power and disposed at a distance from the fourth lens (4);
a sixth lens (6) having positive refractive power and disposed at a distance from the fifth lens (5);
a seventh lens (7) having a negative power and constituting a cemented lens with the sixth lens (6);
a Stop (STO) which is provided at a distance from the seventh lens (7) and limits the aperture of the light beam;
an eighth lens (8) having a negative power and disposed at a distance from the Stop (STO);
a ninth lens (9) having a positive refractive power and constituting a cemented lens with the eighth lens (8);
a tenth lens (10) having positive refractive power and disposed at a distance from the ninth lens (9);
an eleventh lens (11) having positive refractive power and disposed at a distance from the tenth lens (10);
a twelfth lens (12) which has a negative refractive power and constitutes a cemented lens with the eleventh lens (11);
a thirteenth lens (13) having positive refractive power and disposed at a distance from the twelfth lens (12);
a fourteenth lens (14) which has a negative refractive power and is disposed at a distance from the thirteenth lens (13);
and the photosensitive chip (15) is arranged at a distance from the fourteenth lens (14) and is used for capturing an imaging signal and forming an image.
2. The ultra-low distortion optical system of claim 1, wherein: one surface of the first lens (1) facing to the object side is a convex surface, and one surface facing to the image side is a concave surface; both surfaces of the second lens (2) are convex surfaces; one surface of the third lens (3) facing the object side is a convex surface, and one surface facing the image side is a concave surface; one surface of the fourth lens (4) facing the object side is a concave surface, and one surface facing the image side is a convex surface; both surfaces of the fifth lens (5) are convex surfaces; one surface of the sixth lens (6) facing the object side is a concave surface, and one surface facing the image side is a convex surface; one surface of the seventh lens (7) facing the object side is a concave surface, and one 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 surfaces; both surfaces of the eleventh lens (11) are convex surfaces; both surfaces of the twelfth lens (12) are concave surfaces; both surfaces of the thirteenth lens (13) are convex surfaces, and one surface of the fourteenth lens (14) facing the object side is a concave surface and the other surface facing the image side is a convex surface.
3. The ultra-low distortion optical system of claim 1 or 2, wherein: the ultra-low distortion optical system satisfies the following relational expression
-2<f1/f<-1；
0.5<f2/f<1.5；
-2<f3/f<-1；
-2<f4/f<-1；
0.5<f5/f<1；
-6<f6-7/f<-2；
-2<f8-9/f<-1；
1<f10/f<2；
5<f11-12/f<9；
0.5<f13/f<1.5；
-1.5<f14/f<-0.5；
2.5<TL/f<4；
Wherein f is the focal length of the optical system, f1Is the focal length of the first lens (1), f2Is the focal length of the second lens (2), f3Is the focal length of the third lens (3), f4Is the focal length of the fourth lens (4), f5Is the focal length of the fifth lens (5), f6-7Is the combined focal length of the sixth lens (6) and the seventh lens (7), f8-9Is the combined focal length of the eighth lens (8) and the ninth lens (9), f10Is the focal length of the tenth lens (10), f11-12Is the combined focal length of the eleventh lens (11) and the twelfth lens (12), f13Is the focal length of the thirteenth lens (13), f14Is the focal length of the fourteenth lens (14), and TL is the overall length of the lens optics.
4. The ultra-low distortion optical system of claim 1 or 2, wherein: the ultra-low distortion optical system satisfies the following relational expression
Nd1≥1.6；Nd2≥1.7；
Nd3≤1.6；Nd4≥1.6；
Nd5≥1.6；Nd6≤1.8；
Nd7≥1.6；Nd8≥1.6；
Nd9≤1.7；Nd10≤1.6；
Nd11≥1.8；Nd12≤1.7；
Nd13≥1.6；Nd14≥1.7；
Wherein, Nd1Is the refractive index of the first lens (1), Nd2Is the refractive index of the second lens (2), Nd3Is the refractive index of the third lens (3), Nd4Is the refractive index of the fourth lens (4), Nd5Is a refractive index of the fifth lens (5), Nd6Is a refractive index of the sixth lens (6), Nd7Is a refractive index of the seventh lens (7), Nd8Is a refractive index of the eighth lens (8), Nd9Is a refractive index of the ninth lens (9), Nd10Is a refractive index of the tenth lens (10), Nd11Is a refractive index of the eleventh lens (11), Nd12Is a refractive index of the twelfth lens (12), Nd13Is a refractive index of the thirteenth lens (13), Nd14Is the refractive index of the fourteenth lens (14).
5. The ultra-low distortion optical system of claim 1 or 2, wherein: the ultra-low distortion optical system satisfies the following relational expression
Vd1≥40；Vd2≤40；
Vd3≥50；Vd4≤40；
Vd5≤50；Vd6≥40；
Vd7≤40；Vd8≤40；
Vd9≥50；Vd10≥50；
Vd11≤40；Vd12≤40；
Vd13≥30；Vd14≤40；
Wherein, Vd1Is the Abbe number, Vd, of the first lens (1)2Is the Abbe number, Vd, of the second lens (2)3Is the Abbe number, Vd, of the third lens (3)4Is the Abbe number, Vd, of the fourth lens (4)5Is the Abbe number, Vd, of the fifth lens (5)6Is the Abbe number, Vd, of the sixth lens (6)7Is the Abbe number, Vd, of the seventh lens (7)8Is the Abbe number, Vd, of the eighth lens (8)9Is the Abbe number, Vd, of the ninth lens (9)10Is an Abbe number, Vd, of a tenth lens (10)11Is an Abbe number, Vd, of an eleventh lens (11)12Is an Abbe number, Vd, of a twelfth lens (12)13Is the Abbe number, Vd, of the thirteenth lens (13)14The Abbe number of the fourteenth lens (14).
6. The ultra-low distortion optical system of claim 1 or 2, 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) and the seventh lens (7) are all made of glass.
7. The ultra-low distortion optical system of claim 1, wherein: an optical filter (16) is sequentially arranged between the fourteenth lens (14) and the photosensitive chip (15).
8. The ultra-low distortion optical system of claim 7, wherein: and protective glass (17) is sequentially arranged between the optical filter (16) and the photosensitive chip (15).
9. An industrial lens, characterized in that: comprising a lens barrel, and the ultra-low distortion optical system according to any one of claims 1 to 8 disposed inside the lens barrel.
10. Industrial lens according to claim 9, characterized in that: the lens cone is internally provided with a floating focusing mechanism, and the ultra-low distortion optical system is arranged on the floating focusing mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111285872.3A CN114114613B (en) | 2021-11-01 | 2021-11-01 | Ultralow distortion optical system and industrial lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111285872.3A CN114114613B (en) | 2021-11-01 | 2021-11-01 | Ultralow distortion optical system and industrial lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114114613A true CN114114613A (en) | 2022-03-01 |
| CN114114613B CN114114613B (en) | 2023-08-29 |
Family
ID=80379893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111285872.3A Active CN114114613B (en) | 2021-11-01 | 2021-11-01 | Ultralow distortion optical system and industrial lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114114613B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118033871A (en) * | 2024-03-13 | 2024-05-14 | 广州长步道光学科技有限公司 | 10 Times large-angle industrial microscope objective lens |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001194590A (en) * | 1999-10-29 | 2001-07-19 | Minolta Co Ltd | Image pickup lens device |
| JP2012220527A (en) * | 2011-04-04 | 2012-11-12 | Canon Inc | Optical system and optical device having the same |
| US20150131162A1 (en) * | 2013-11-13 | 2015-05-14 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| JP2017156741A (en) * | 2016-02-29 | 2017-09-07 | リコーイメージング株式会社 | Zoom lens system |
| CN207216112U (en) * | 2017-09-19 | 2018-04-10 | 舜宇光学(中山)有限公司 | Machine visual lens |
| KR20180119886A (en) * | 2017-04-26 | 2018-11-05 | 주식회사 삼양옵틱스 | Lens optical system and photographing apparatus having the same |
| CN109884780A (en) * | 2019-04-16 | 2019-06-14 | 中山联合光电科技股份有限公司 | A kind of inexpensive, high-resolution ultrashort out-of-focus projection's optical system |
| WO2020048474A1 (en) * | 2018-09-04 | 2020-03-12 | 中国科学院长春光学精密机械与物理研究所 | Microscope objective optical system and optical device |
| WO2020063249A1 (en) * | 2018-09-30 | 2020-04-02 | Zhejiang Dahua Technology Co., Ltd. | Zoom lens and optical device having the same |
| CN213069315U (en) * | 2020-10-13 | 2021-04-27 | 厦门力鼎光电股份有限公司 | Internal focusing optical imaging lens |
-
2021
- 2021-11-01 CN CN202111285872.3A patent/CN114114613B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001194590A (en) * | 1999-10-29 | 2001-07-19 | Minolta Co Ltd | Image pickup lens device |
| JP2012220527A (en) * | 2011-04-04 | 2012-11-12 | Canon Inc | Optical system and optical device having the same |
| US20150131162A1 (en) * | 2013-11-13 | 2015-05-14 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| JP2017156741A (en) * | 2016-02-29 | 2017-09-07 | リコーイメージング株式会社 | Zoom lens system |
| KR20180119886A (en) * | 2017-04-26 | 2018-11-05 | 주식회사 삼양옵틱스 | Lens optical system and photographing apparatus having the same |
| CN207216112U (en) * | 2017-09-19 | 2018-04-10 | 舜宇光学(中山)有限公司 | Machine visual lens |
| WO2020048474A1 (en) * | 2018-09-04 | 2020-03-12 | 中国科学院长春光学精密机械与物理研究所 | Microscope objective optical system and optical device |
| WO2020063249A1 (en) * | 2018-09-30 | 2020-04-02 | Zhejiang Dahua Technology Co., Ltd. | Zoom lens and optical device having the same |
| CN109884780A (en) * | 2019-04-16 | 2019-06-14 | 中山联合光电科技股份有限公司 | A kind of inexpensive, high-resolution ultrashort out-of-focus projection's optical system |
| CN213069315U (en) * | 2020-10-13 | 2021-04-27 | 厦门力鼎光电股份有限公司 | Internal focusing optical imaging lens |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118033871A (en) * | 2024-03-13 | 2024-05-14 | 广州长步道光学科技有限公司 | 10 Times large-angle industrial microscope objective lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114114613B (en) | 2023-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11733490B2 (en) | Optical system | |
| US11333857B2 (en) | Optical system | |
| US10386603B2 (en) | Optical lens assembly and image capturing device | |
| US9372325B2 (en) | Photographic lens optical system | |
| TWI435138B (en) | Optical imaging system for pickup | |
| CN113341538B (en) | High-resolution optical system suitable for different object distances and FA lens | |
| US9715084B2 (en) | Photographic lens optical system | |
| US9658434B2 (en) | Photographic lens optical system | |
| CN108845417B (en) | Parallax error eliminating machine vision optical system | |
| CN114153064A (en) | Integrated microscopic optical system and microscope | |
| CN114114613B (en) | Ultralow distortion optical system and industrial lens | |
| CN111352211A (en) | Small-head high-resolution lens | |
| CN114114616B (en) | High-resolution ultralow-distortion optical system and lens | |
| CN112612115A (en) | Optical imaging lens | |
| CN114114615B (en) | High-resolution floating focusing system and lens suitable for different object distances | |
| CN114740599B (en) | Optical system, camera module and electronic equipment | |
| CN114509862B (en) | Optical system, camera module and electronic equipment | |
| CN213780517U (en) | Optical imaging lens | |
| CN108802971B (en) | Low-distortion machine vision optical system | |
| CN112859295A (en) | Optical system, camera module and electronic equipment | |
| CN215494316U (en) | Low-distortion optical system and lens | |
| CN215494319U (en) | Low distortion optical system and lens | |
| CN215494320U (en) | Fixed-focus optical system and lens | |
| CN113504630B (en) | Fixed-focus optical system and lens | |
| CN113406773B (en) | Low-distortion optical system and lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |