CN211603701U - High-resolution large-aperture lens - Google Patents
High-resolution large-aperture lens Download PDFInfo
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- CN211603701U CN211603701U CN202020266078.9U CN202020266078U CN211603701U CN 211603701 U CN211603701 U CN 211603701U CN 202020266078 U CN202020266078 U CN 202020266078U CN 211603701 U CN211603701 U CN 211603701U
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Abstract
The utility model belongs to the technical field of the camera lens, concretely relates to big light ring camera lens of high resolution, including mechanical device and install in the inside optical module of mechanical device, optical module sets gradually fixed S1 of group and focusing group S2 by the object space to the image space, the focus f of optical module, the focus of fixed S1 of group is f1Focal length f of said focus group S22，f1The ratio of f to f satisfies the relation: 0.90 < | f1/f|＜1.60；f2The ratio of f to f satisfies the relation: 2.0 < | f2The/| is less than 5.0. By the structure, high resolution is realizedThe maximum aperture of the optical module of the large-aperture lens reaches F1.4, and the resolution of pixels can reach 1000 ten thousand levels; the working distance is wide, a floating focusing mode is adopted, the corresponding imaging requirements can be met from 200mm to infinity, and the clear aperture can be flexibly adjusted.
Description
Technical Field
The utility model belongs to the technical field of the camera lens, concretely relates to big light ring camera lens of high resolution.
Background
Under the background of industrial automation, the industrial lens is widely applied to the fields of machine vision detection such as measurement, judgment and defect detection, food packaging, intelligent logistics, medical diagnosis and the like. The requirements of the application occasions on the performance of the lens are not different, for example, the size measurement application requires the distortion of the lens to be lower; fine defect detection applications require higher resolution of the lens; the online detection application can improve the detection speed by using the line scanning lens; detection in dark fields or environments with dark ambient light requires a larger lens aperture, and so on. However, the resolution of the domestic conventional industrial lens is low although the industrial lens has a large aperture, or the resolution is high but the aperture is small, so the research and development of the high-resolution large-aperture lens are more urgent.
At present, in a machine vision lens on the market, as in patent No. 201720684137.2, the maximum aperture of the lens is F2.2, but the resolution of the lens is only mega pixels, and the resolution cannot meet the requirement of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the defects of the prior art, the optical module of the high-resolution large-aperture lens is developed, can be applied to measurement and detection items under the condition of a darker environment, and meets different industrial development requirements.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high-resolution large-aperture lens comprises a mechanical device and an optical module arranged in the mechanical device, wherein the optical module is provided with a fixed group S1 and a focusing group S2 in sequence from an object side to an image side;
the fixed group S1 comprises a first lens G1 with positive focal power and a meniscus structure, a second lens G2 with positive focal power and a meniscus structure, a third lens G3 with positive focal power and a double convex structure, a fourth lens G4 with negative focal power and a double concave structure, a fifth lens G5 with negative focal power and a double concave structure, a sixth lens G6 with positive focal power and a double convex structure, and a seventh lens G7 with positive focal power and a double convex structure; a diaphragm is arranged between the fourth lens G4 and the fifth lens G5; the fixed group S1 is of a double-Gaussian structure, the diaphragm is arranged between the two cemented lenses, and the structural mode can better correct the vertical axis aberration and is beneficial to improving the optical index performance of the lens.
The focusing group S2 includes an eighth lens G8 having negative optical power and a ninth lens G9 having positive optical power; the fine adjustment of the focusing group can well balance the aberration caused by the object distance, and the imaging with wide working distance is realized.
The focal length f of the optical module is f, and the focal length of the fixed group S1 is f1Focal length f of said focus group S22，f1The ratio of f to f satisfies the relation: 0.90 < | f1/f|＜1.60；f2The ratio of f to f satisfies the relation: 2.0 < | f2/f|＜5.0。
As an improvement of the large aperture lens with high resolution, the first lens G1 is close to the vertex of the object side surface reaches the distance L of the image plane with the focal length f of the optical module, the relational expression is satisfied: l/f < 2.0.
As a big light ring camera lens of high resolution's improvement, optical module's half high y 'of being like the image with optical module's focus f satisfies the relational expression: the | y'/f | is less than 0.4.
As an improvement of the high-resolution large-aperture lens of the present invention, the refractive index of the first lens G1 is n1, the refractive index of the second lens G2 is n2, the refractive index n1 and the refractive index n2 satisfy the relation, 1.6 is not less than n1, and n2 is not less than 1.9.
As an improvement of the high resolution large aperture lens of the present invention, the third lens G3 and the fourth lens G4 form a first cemented lens group U1, the fifth lens G5 and the sixth lens G6 form a second cemented lens group U2, the first glueFocal length f of combined lens group U1u1The focal length of the second cemented lens group U2 is fu2，fu1The ratio of f to f satisfies the relation: 0.3 < | fu1/f|＜1.0，fu2The ratio of f to f satisfies the relation: 20 < | fu2/f|＜30。
As an improvement of the high-resolution large-aperture lens of the present invention, the refractive index of the seventh lens G7 is n7, 1.8 is not less than n7 is not less than 2.0.
As an improvement of the high resolution large aperture lens of the present invention, the eighth lens G8 and the ninth lens G9 form a third cemented lens group U3, the focal length of the eighth lens G8 is fG8The focal length of the ninth lens G9 is fG9，fG8And fG9The ratio of (A) satisfies the relation: 1.0 < | fG8/fG9|＜2.0。
As an improvement of the large aperture lens with high resolution, each lens is a spherical mirror.
The beneficial effects of the utility model reside in that: the optical module of the high-resolution large-aperture lens is realized through the structure, the maximum aperture reaches F1.4, and the resolution of pixels can reach 1000 ten thousand levels; the working distance is wide, a floating focusing mode is adopted, corresponding imaging requirements can be met from 200mm to infinity, different application requirements can be met, and meanwhile the clear aperture can be flexibly adjusted.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided to explain the invention and not to constitute an undue limitation on the invention. In the drawings:
fig. 1 is a schematic view of a lens optical module according to a first embodiment;
FIG. 2 is a schematic view of a lens optical module according to a second embodiment;
in the figure: 1-diaphragm, 2-image plane, G1-first lens, G2-second lens, G3-third lens, G4-fourth lens, G5-fifth lens, G6-sixth lens, G7-seventh lens, G8-eighth lens, G9-ninth lens and U1-first cemented lens group; u2-second cemented lens group, U3-third cemented lens group, S1-fixed group, S2-focusing group.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do 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 present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.
Example one
As shown in fig. 1, the present embodiment provides a high resolution large aperture lens, which includes a mechanical device and an optical module installed inside the mechanical device, wherein the optical module is sequentially provided with a fixed group S1 and a focusing group S2 from an object side to an image side;
the fixed group S1 comprises a first lens G1 with positive focal power and a meniscus structure, a second lens G2 with positive focal power and a meniscus structure, a third lens G3 with positive focal power and a double convex structure, a fourth lens G4 with negative focal power and a double concave structure, a fifth lens G5 with negative focal power and a double concave structure, a sixth lens G6 with positive focal power and a double convex structure, and a seventh lens G7 with positive focal power and a double convex structure; a diaphragm 1 is arranged between the fourth lens G4 and the fifth lens G5; the fixed group is of a double-Gaussian-like structure, the diaphragm 1 is placed between the two cemented lenses, and the structure mode can better correct the vertical axis aberration and is beneficial to improving the optical index performance of the lens.
The focusing group S2 includes an eighth lens G8 having negative optical power and a ninth lens G9 having positive optical power; the fine adjustment of the focusing group S2 can well balance the aberration caused by the object distance, and realize the imaging with wide working distance.
The focal length f of the optical module and the focal length f of the fixed set S11Focal length f of focusing group S22，f1The ratio of f to f satisfies the relation: 0.90 < | f1/f|＜1.60；f2The ratio of f to f satisfies the relation: 2.0 < | f2/f|＜5.0。
Further, the distance L from the vertex of the first lens G1 close to the object side surface to the image plane 2 and the focal length f of the optical module satisfy the following relation: l/f < 2.0.
Further, the half-image height y' of the optical module and the focal length f of the optical module satisfy the relation: the | y'/f | is less than 0.4.
Furthermore, the refractive index of the first lens G1 is n1, the refractive index of the second lens G2 is n2, the refractive index n1 and the refractive index n2 simultaneously satisfy the relational expression, wherein n1 is larger than or equal to 1.6, and n2 is smaller than or equal to 1.9.
Further, the third lens G3 and the fourth lens G4 form a first glueThe combined lens group U1, the fifth lens G5 and the sixth lens G6 form a second cemented lens group U2, and the focal length f of the first cemented lens group U1u1The focal length of the second cemented lens group U2 is fu2，fu1The ratio of f to f satisfies the relation: 0.3 < | fu1/f|＜1.0，fu2The ratio of f to f satisfies the relation: 20 < | fu2/f|＜30。
Further, the refractive index of the seventh lens G7 is n7, 1.8 ≦ n7 ≦ 2.0.
Further, the eighth lens G8 and the ninth lens G9 form a third cemented lens group U3, and the focal length f of the eighth lens G8 isG8The focal length of the ninth lens G9 is fG9，fG8And fG9The ratio of (A) satisfies the relation: 1.0 < | fG8/fG9|＜2.0。
Further, each lens is a spherical mirror.
The specific optical module data is as follows:
in this embodiment, the focal length F of the optical module is 25mm, the maximum aperture F # is 1.4, and the focal length F of the fixed group S1 is set131.23mm, focal length f of focus group S2269.79mm, the distance L from the vertex of the first lens G1 close to the object side surface to the image plane 2 is 41.49mm, the half-image height y' is 8.8mm, and the focal length f of the first cemented lens group U1U1-16.74mm, focal length f of the second cemented lens group U2U2Focal length f of the eighth lens G8 of-671.01 mmG8-54.87mm, focal length f of ninth lens G9G9＝30.53mm
Each relation: l f1/f|＝1.25；|f2/f|＝2.79；|L/f|＝1.66；
|y’/f|＝0.35；|fu1/f|＝0.67；|fu2/f|＝26.84；
|fG8/fG9|＝1.80
Satisfy the relation: 0.90<|f1/f|<1.60；2.0<|f2/f|<5.0；|L/f|＜2.0；
|y’/f|＜0.4；0.3＜|fu1/f|＜1.0；
20＜|fu2/f|＜30；1.0＜|fG8/fG9|＜2.0。
Example two
As shown in fig. 2, the present embodiment provides a high resolution large aperture lens, and the specific optical module data is as follows:
| surface of | Radius (mm) | Thickness (mm) | Refractive index |
| Front surface of G1 | 28.6 | 4.3 | 1.6 |
| Rear surface of G1 | 1300.0 | 0.1 | |
| Front surface of G2 | 18.7 | 4.0 | 1.8 |
| Rear surface of G2 | 40.4 | 0.7 | |
| U1 front surface | 111.0 | 3.4 | 1.7 |
| U1 cemented surface | -55.5 | 1.2 | 1.6 |
| U1 rear surface | 10.9 | 4.0 | |
| Diaphragm | Plane surface | 9.6 | |
| U2 front surface | -14.2 | 1.0 | 1.6 |
| U2 cemented surface | 22.4 | 4.0 | 1.8 |
| U2 rear surface | -22.6 | 0.1 | |
| Front surface of G7 | 312 | 2.2 | 1.9 |
| Rear surface of G7 | -43.1 | 1.9 | |
| U3 front surface | 39.0 | 6.4 | 1.8 |
| U3 cemented surface | 14.9 | 5.1 | 1.6 |
| U3 rear surface | 155.8 | 11.3 | |
| Image plane | Plane surface |
In example two, the focal length F of the optical module is 35mm, the maximum aperture F # is 1.4, and the focal length F of the fixed set S1 is143.10mm, focal length f of focus group S22135.39mm, the distance L from the vertex of the first lens G1 close to the object side surface to the image plane 2 is 53.03mm, the half-image height y' is 8.8mm, and the focal length f of the first cemented lens group U1U1-18.55mm, focal length f of the second cemented lens group U2U2Focal length f of the eighth lens G8 of-721.23 mmG8-34.25mm, focal length f of ninth lens G9G9＝24.98mm
Each relation: l f1/f|＝1.23；|f2/f|＝3.87；|L/f|＝1.52；
|y’/f|＝0.25；|fu1/f|＝0.53；|fu2/f|＝20.61；
|fG8/fG9|＝1.37。
Satisfy the relation: 0.90<|f1/f|<1.60；2.0<|f2/f|<5.0；|L/f|＜2.0；
|y’/f|＜0.4；0.3＜|fu1/f|＜1.0；20＜|fu2/f|＜30；
1.0＜|fG8/fG9|＜2.0。
The optical module of the high-resolution large-aperture lens is realized through the structure, the maximum aperture reaches F1.4, and the resolution of pixels can reach 1000 ten thousand levels; the working distance is wide, a floating focusing mode is adopted, corresponding imaging requirements can be met from 200mm to infinity, different application requirements can be met, and meanwhile the clear aperture can be flexibly adjusted.
While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed above, or as otherwise known in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (8)
1. A high-resolution large-aperture lens is characterized by comprising a mechanical device and an optical module arranged in the mechanical device, wherein the optical module is provided with a fixed group S1 and a focusing group S2 in sequence from an object side to an image side;
the fixed group S1 comprises a first lens G1 with positive focal power and a meniscus structure, a second lens G2 with positive focal power and a meniscus structure, a third lens G3 with positive focal power and a double convex structure, a fourth lens G4 with negative focal power and a double concave structure, a fifth lens G5 with negative focal power and a double concave structure, a sixth lens G6 with positive focal power and a double convex structure, and a seventh lens G7 with positive focal power and a double convex structure; a diaphragm is arranged between the fourth lens G4 and the fifth lens G5;
the focusing group S2 includes an eighth lens G8 having negative optical power and a ninth lens G9 having positive optical power;
the focal length f of the optical module is f, and the focal length of the fixed group S1 is f1Focal length f of said focus group S22，f1The ratio of f to f satisfies the relation: 0.90 < | f1/f|＜1.60；f2The ratio of f to f satisfies the relation: 2.0 < | f2/f|＜5.0。
2. The high-resolution large-aperture lens according to claim 1, wherein the distance L from the vertex of the first lens G1 close to the object side surface to the image plane and the focal length f of the optical module satisfy the following relation: l/f < 2.0.
3. The high resolution large aperture lens according to claim 1, wherein the half-image height y' of the optical module and the focal length f of the optical module satisfy the following relation: the | y'/f | is less than 0.4.
4. The high-resolution large-aperture lens according to claim 1, wherein the refractive index of the first lens G1 is n1, the refractive index of the second lens G2 is n2, and the refractive index n1 and the refractive index n2 satisfy the relations of 1.6 ≦ n1 and n2 ≦ 1.9.
5. The high resolution large aperture lens according to claim 1, wherein the third lens G3 and the fourth lens G4 form a first cemented lens group U1, the fifth lens G5 and the sixth lens G6 form a second cemented lens group U2, and the focal length of the first cemented lens group U1 is fu1The focal length of the second cemented lens group U2 is fu2，fu1The ratio of f to f satisfies the relation: 0.3 < | fu1/f|＜1.0，fu2The ratio of f to f satisfies the relation: 20 < | fu2/f|＜30。
6. The high-resolution large-aperture lens according to claim 1, wherein the refractive index of the seventh lens G7 is n7, 1.8 ≦ n7 ≦ 2.0.
7. The high resolution large aperture lens according to claim 1, wherein the eighth lens G8 and the ninth lens G9 constitute a third cemented lens group U3, and the focal length of the eighth lens G8 is fG8The focal length of the ninth lens G9 is fG9，fG8And fG9The ratio of (A) satisfies the relation: 1.0 < | fG8/fG9|＜2.0。
8. The high resolution large aperture lens according to claim 1, wherein each of said lenses is a spherical mirror.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111190272A (en) * | 2020-03-06 | 2020-05-22 | 广东奥普特科技股份有限公司 | High-resolution large-aperture lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111190272A (en) * | 2020-03-06 | 2020-05-22 | 广东奥普特科技股份有限公司 | High-resolution large-aperture lens |
| CN111190272B (en) * | 2020-03-06 | 2025-03-07 | 广东奥普特科技股份有限公司 | A high-resolution, large-aperture lens |
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