CN213843660U - High-resolution large-view-field industrial lens - Google Patents
High-resolution large-view-field industrial lens Download PDFInfo
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- CN213843660U CN213843660U CN202023309123.3U CN202023309123U CN213843660U CN 213843660 U CN213843660 U CN 213843660U CN 202023309123 U CN202023309123 U CN 202023309123U CN 213843660 U CN213843660 U CN 213843660U
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Abstract
The utility model discloses a big visual field industrial lens of high resolution, including optical system, optical system sets gradually the focusing group that has negative focal power and the fixed group that has positive focal power by the object space to the image space, and fixed group is including well group, the diaphragm that has positive focal power, the back group that has positive focal power, optical system's focus f, and the focus of focusing group is fS1Focal length of the fixed group is fS2Respectively satisfy the relational expressions: 1.10<|fS1/f|<1.30，1.20<|fS2/f|<1.45. The low distortion and image F number with the focal length of 35mm are realized by the structureThe image quality is 4.5, the maximum imaging surface is phi 44mm, the highest resolution can reach 160lp/mm, the image quality can be matched with a 3.2 mu m pixel chip, when the corresponding full-frame chip is used, the pixel can reach nine million pixels, and the maximum optical distortion of the full field of view is lower than 0.5 percent; the light aperture can be flexibly adjusted by adopting a floating focusing mode.
Description
Technical Field
The utility model belongs to the technical field of optical imaging, concretely relates to optical system of big visual field industrial lens of high resolution.
Background
With the continuous iterative development of industrial lenses, the industrial lenses with small target surfaces cannot meet the detection requirements of industries such as large-scale mechanical manufacturing, spinning, printing, display manufacturing and the like. Wide-angle industrial lenses with larger target surfaces are urgently needed to meet the requirements of large-scale manufacturing industry. Meanwhile, with the continuous improvement of the detection precision, the application of the high-resolution camera is more and more extensive, and accordingly, higher requirements are provided for the resolution of the lens, so that the improvement of the resolution of the lens and the improvement of the image quality are the permanent targets for improving the performance of the lens. However, there are few optical lenses available on the market that can match a large target surface, and there are some disadvantages in terms of resolution, especially in short-range imaging for industrial applications.
Therefore, the research and development of the optical lens with high resolution, large target surface and large field of view are more urgent.
SUMMERY OF THE UTILITY MODEL
In view of the problems in the related art, the present application aims to provide a high-resolution large-field industrial lens, which has the highest resolution up to 160lp/mm, can match with a 3.2 μm pixel chip, has the maximum target surface size of a full frame, and has low distortion performance.
In order to achieve the above object, the present application provides a high resolution large field industrial lens, comprising an optical system, which is provided with a focusing group S1 having negative optical power and a fixed group S2 having positive optical power in order from an object side to an image side; wherein the fixed group S1 includes a middle group T1 having positive optical power, a diaphragm, a rear group T2 having positive optical power;
the focus group S1 includes a first lens G1 having a negative power, meniscus configuration; a second lens G2 having a positive optical power, a double convex structure; a third lens G3 having a negative power, biconcave structure; a fourth lens G4 having a negative power, biconcave structure; a fifth lens G5 having a positive power, meniscus configuration; wherein the second lens G2 and the third lens G3 are cemented into a first cemented lens group U1 with negative power, and the fourth lens G4 and the fifth lens G5 are cemented into a second cemented lens group U2 with negative power;
the middle group T1 includes a sixth lens G6 having a positive optical power, a double convex structure; a seventh lens G7 with negative focal power and a meniscus structure, wherein the sixth lens G6 and the seventh lens G7 are cemented into a third cemented lens group U3 with positive focal power;
the rear group T2 includes an eighth lens G8 having a positive optical power, a double convex structure; a ninth lens G9 having a negative power, biconcave structure; a tenth lens G10 having a positive power, meniscus configuration; an eleventh lens G11 having a positive optical power, a double convex structure; a twelfth lens G12 having a positive power, meniscus configuration; a thirteenth lens G13 having a negative power, meniscus configuration. The eighth lens G8 and the ninth lens G9 are cemented into a fourth cemented lens group U4 with negative power; the twelfth lens G12 and the thirteenth lens G13 are cemented into a fifth cemented lens group U5 having negative power;
the focal length of the optical system is f, and the focal length of the focusing group S1 is fS1The focal length of the fixed group S2 is fS2Respectively satisfy the relational expressions: 1.10<|fS1/f|<1.30，1.20<|fS2/f|<1.45。
Further, a distance L from a vertex of a front surface of the first lens G1 to a vertex of a rear surface of the thirteenth lens G13 of the optical system and a focal length f of the optical system satisfy the following relation: l/f > 3.20.
Further, the optical back intercept BFL of the optical system and the focal length f of the optical system satisfy the relation: i BFL/f I is less than 1.30; the half image height y' of the optical system and the focal length f of the optical system satisfy the relation: the | y'/f | is less than 0.75.
Further, the focal length of the middle group T1 is fT1The focal length of the rear group T2 is fT2Wherein, the focal length fT1Focal length fT2Ratio to the focal length f of the optical systemThe relation is satisfied: 1.10 < | fT1/f|＜1.40，1.60＜|fT2/f|＜1.95。
Further, the first lens G1 has a focal length fG1Focal length f thereofG1And the ratio of the optical system to the focal length f of the optical system satisfies the relation: 1.90 < | fG1The/| < 2.30; the tenth lens G10 has a focal length fG10Focal length f thereofG10And the ratio of the optical system to the focal length f of the optical system satisfies the relation: 2.10 < | fG10The/| < 2.30; the focal length of the eleventh lens G11 is fG11Focal length f thereofG11And the ratio of the optical system to the focal length f of the optical system satisfies the relation: 1.85 < | fG11/f|＜2.20。
Further, the focal length f of the first cemented lens group U1U1Focal length f thereofU1And the focal length f of the optical system satisfies the relation: 6.80 < | fU1/f|＜8.00。
Further, the focal length f of the second cemented lens group U2U2Focal length f thereofU2And the focal length f of the optical system satisfies the relation: 7.50 < | fU2/f|＜8.50。
Further, the focal length f of the fourth cemented lens group U3U4Focal length f thereofU4And the focal length f of the optical system satisfies the relation: 1.30 < | fU4/f|＜1.70。
Further, the focal length f of the fifth cemented lens group U5U5Focal length f thereofU5And the focal length f of the optical system satisfies the relation: 14.5 < | fU4/f|＜17.5
Further, when the object distance of the optical system is changed, the relative position of the fixed group S2 and the image plane is not changed, and the air space D between the focusing group S1 and the fixed group S2 is changedtTo make the image clear, wherein the air space DtThe ratio to the focal length f of the optical system satisfies the relation: i Dt/f|＜0.48。
Furthermore, each lens of the optical system is a spherical mirror, the aperture of the diaphragm of the optical system is a circular hole, and the aperture of the diaphragm is adjustable within the range of F4.5-F32.
The technical scheme provided by the application can achieve the following beneficial effects: the application relates to a high-resolution large-visual-field industrial lens which comprises an optical system, wherein a focusing group S1 with negative focal power and a fixed group S2 with positive focal power are sequentially arranged from an object side to an image side; wherein the fixed group S2 includes a middle group T1 having positive optical power, a diaphragm, a rear group T2 having positive optical power; the focal length of the optical system is f, and the focal length of the focusing group S1 is fS1The focal length of the fixed group S2 is fS2It satisfies the relation: 1.10<|fS1/f|<1.30，1.20<|fS2/f|<1.45. The optical system of the low-distortion optical lens with the focal length of 35mm is realized through the structure, the number of an image F is 4.5, the maximum imaging surface is phi 44mm, the highest resolution can reach 160lp/mm, the optical system can be matched with a 3.2-micrometer pixel chip, when a corresponding full-picture chip is adopted, the number of pixels can reach nine million pixels, and the maximum optical distortion of a full view field is lower than 0.50%; the light aperture can be flexibly adjusted by adopting a floating focusing mode.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an optical system in the present application.
Fig. 2 is a graph of optical distortion of the optical system of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, it should be understood that the term "and/or" used in the present application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the description of the present application, it should be understood that the terms "upper" and "lower" used in the description of the embodiments of the present application are used in a descriptive sense only and not for purposes of limitation. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element. The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 1, the high-resolution large-field industrial lens of the present embodiment includes an optical system in which a focusing group S1 having negative optical power and a fixed group S2 having positive optical power are arranged in this order from the object side to the image side; wherein the fixed group S1 includes a middle group T1 having positive optical power, a diaphragm, a rear group T2 having positive optical power;
the focusing group S1 includes a first lens G1 having a negative power, meniscus configuration; a second lens G2 having a positive optical power, a double convex structure; a third lens G3 having a negative power, biconcave structure; a fourth lens G4 having a negative power, biconcave structure; a fifth lens G5 having a positive power, meniscus configuration; wherein the second lens G2 and the third lens G3 are cemented into a first cemented lens group U1 with negative power, and the fourth lens G4 and the fifth lens G5 are cemented into a second cemented lens group U2 with negative power;
the middle group T1 includes a sixth lens G6 having a positive optical power, a double convex structure; a seventh lens G7 with negative focal power and a meniscus structure, wherein the sixth lens G6 and the seventh lens G7 are cemented into a third cemented lens group U3 with positive focal power;
the rear group T2 includes an eighth lens G8 having a positive optical power, a double convex structure; a ninth lens G9 having a negative power, biconcave structure; a tenth lens G10 having a positive power, meniscus configuration; an eleventh lens G11 having a positive optical power, a double convex structure; a twelfth lens G12 having a positive power, meniscus configuration; a thirteenth lens G13 having a negative power, a meniscus configuration; the eighth lens G8 and the ninth lens G9 are cemented into a fourth cemented lens group U4 with negative power; the twelfth lens G12 and the thirteenth lens G13 are cemented into a fifth cemented lens group U5 having negative power;
the focal length of the optical system is f, and the focal length of the focusing group S1 is fS1Fixed set S2 has a focal length fS2Respectively satisfy the relational expressions: 1.10<|fS1/f|<1.30，1.20<|fS2/f|<1.45。
Preferably, a distance L from a vertex of a front surface of the first lens G1 to a vertex of a rear surface of the thirteenth lens G13 of the optical system and a focal length f of the optical system satisfy the following relation: l/f > 3.20.
Preferably, the optical back intercept BFL of the optical system and the focal length f of the optical system satisfy the relation: i BFL/f I is less than 1.30; the half-image height y' of the optical system and the focal length f of the optical system satisfy the relation: the | y'/f | is less than 0.75.
Preferably, the focal length of the middle group T1 is fT1The focal length of the rear group T2 is fT2Wherein, the focal length fT1Focal length fT2Of optical systemsThe ratio of the focal lengths f respectively satisfies the relation: 1.10 < | fT1/f|＜1.40，1.60＜|fT2/f|＜1.95。
Preferably, the first lens G1 has a focal length fG1Focal length f thereofG1And the ratio of the optical system to the focal length f of the optical system satisfies the relation: 1.90 < | fG1The/| < 2.30; the tenth lens G10 has a focal length fG10Focal length f thereofG10And the ratio of the optical system to the focal length f of the optical system satisfies the relation: 2.10 < | fG10The/| < 2.30; the focal length f of the eleventh lens G11G11Focal length f thereofG11And the ratio of the optical system to the focal length f of the optical system satisfies the relation: 1.85 < | fG11/f|＜2.20。
Preferably, the focal length f of the first cemented lens group U1U1Focal length f thereofU1And the focal length f of the optical system satisfies the relation: 6.80 < | fU1/f|＜8.00。
Preferably, the focal length f of the second cemented lens group U2U2Focal length f thereofU2And the focal length f of the optical system satisfies the relation: 7.50 < | fU2/f|＜8.50。
Preferably, the fourth cemented lens group U3 has a focal length fU4Focal length f thereofU4And the focal length f of the optical system satisfies the relation: 1.30 < | fU4/f|＜1.70。
Preferably, the focal length f of the fifth cemented lens group U5U5Focal length f thereofU5And the focal length f of the optical system satisfies the relation: 14.5 < | fU4/f|＜17.5
Preferably, when the object distance of the optical system is changed, the relative position of the fixed group S2 and the image plane is not changed, and the air interval D between the focusing group S1 and the fixed group S2 is changedtTo make the image clear, wherein the air space DtThe ratio to the focal length f of the optical system satisfies the relation: i Dt/f|＜0.48。
Preferably, each lens of the optical system is a spherical mirror, the aperture of the diaphragm of the optical system is a circular hole, and the aperture of the diaphragm is adjustable within the range of F4.5-F32.
In this example, the optical system data is as follows:
in this example, the focal length F of the optical system is 35mm, the maximum aperture F # is 4.5, and the focal length F of the focusing group S1S1Focal length f of set S2 is fixed at-43.46 mmS245.77mm, distance L from the front surface vertex of the first lens G1 to the rear surface vertex of the thirteenth lens G13 is 167.8mm, optical back intercept BFL is 37.7mm, half image height y is 22.0mm, and focal length f of the middle group T1T143.10mm, focal length f of rear group T2T264.17mm, focal length f of the first lens G1G1-75.72mm, focal length f of the first cemented lens groupU1-261.33mm, focal length f of the second cemented lens groupU2-281.31mm, focal length f of the fourth cemented lens groupU4Focal length f of-55.28 mm, tenth lens G10G1077.36mm, focal length f of eleventh lens G11G1168.50mm, focal length f of the fifth cemented lens groupU5-547.95mm, air gap Dt＝15mm。
Each relation: l fS1/f|＝1.24；|fS2/f|＝1.30；|L/f|＝4.79；
|BFL/f|＝1.07；|y`/f|＝0.62；|fT1/f|＝1.23；|fT2/f|＝1.83；
|fG1/f|＝2.16；|fU1/f|＝7.46；|fU2/f|＝8.07；|fU4/f|＝1.57；
|fG10/f|＝2.21；|fG11/f|＝1.95；|fU5/f|＝15.65；|Dt/f|＝0.42；
Satisfy the relation: 1.10<|fS1/f|<1.30；1.20<|fS2/f|<1.45；|L/f|>3.20；
|BFL/f|＜1.30；|y`/f|＜0.75；1.10＜|fT1/f|＜1.40；
1.60＜|fT2/f|＜1.95；1.90＜|fG1/f|＜2.30；
6.80＜|fU1/f|＜8.00；7.50＜|fU2/f|＜8.50；
1.30＜|fU4/f|＜1.70；2.10＜|fG10/f|＜2.30；
1.85＜|fG11/f|＜2.20；14.50＜|fU5/f|＜17.50；|Dt/f|＜0.48。
Fig. 2 is a graph showing the optical distortion of the present embodiment, wherein the maximum optical distortion is less than 0.50% in the full field of view.
This application has realized through above-mentioned structure that focus is 35 mm's low distortion optical lens's optical system, and image space F number is 4.5, and the biggest image plane is
The highest resolution can reach 160lp/mm, can match with a 3.2 mu m pixel chip, and when the corresponding full-frame chip is used, the pixels can reach nine million pixels, and the maximum optical distortion of the full field of view is lower than 0.50 percent; the light aperture can be flexibly adjusted by adopting a floating focusing mode.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (8)
1. A high-resolution large-field industrial lens is characterized in that: the optical system is provided with a focusing group S1 with negative focal power and a fixed group S2 with positive focal power in sequence from an object side to an image side; wherein the fixed group S2 includes a middle group T1 having positive optical power, a diaphragm, a rear group T2 having positive optical power;
the focus group S1 includes a first lens G1 having a negative power, meniscus configuration; a second lens G2 having a positive optical power, a double convex structure; a third lens G3 having a negative power, biconcave structure; a fourth lens G4 having a negative power, biconcave structure; a fifth lens G5 having a positive power, meniscus configuration; wherein the second lens G2 and the third lens G3 are cemented into a first cemented lens group U1 with negative power, and the fourth lens G4 and the fifth lens G5 are cemented into a second cemented lens group U2 with negative power;
the middle group T1 includes a sixth lens G6 having a positive optical power, a double convex structure; a seventh lens G7 with negative focal power and a meniscus structure, wherein the sixth lens G6 and the seventh lens G7 are cemented into a third cemented lens group U3 with positive focal power;
the rear group T2 includes an eighth lens G8 having a positive optical power, a double convex structure; a ninth lens G9 having a negative power, biconcave structure; a tenth lens G10 having a positive power, meniscus configuration; an eleventh lens G11 having a positive optical power, a double convex structure; a twelfth lens G12 having a positive power, meniscus configuration; a thirteenth lens G13 having a negative power, a meniscus configuration; the eighth lens G8 and the ninth lens G9 are cemented into a fourth cemented lens group U4 with negative power; the twelfth lens G12 and the thirteenth lens G13 are cemented into a fifth cemented lens group U5 having negative power;
the focal length of the optical system is f, and the focal length of the focusing group S1 is fS1The focal length of the fixed group S2 is fS2Respectively satisfy the relational expressions: 1.10<|fS1/f|<1.30，1.20<|fS2/f|<1.45。
2. The high resolution large field of view industrial lens of claim 1, wherein: the distance L from the vertex of the front surface of the first lens G1 to the vertex of the rear surface of the thirteenth lens G13 of the optical system and the focal length f of the optical system satisfy the following relation: l/f > 3.20.
3. The high resolution large field of view industrial lens of claim 1, wherein: the optical back intercept BFL of the optical system and the focal length f of the optical system satisfy the relation: i BFL/f I is less than 1.30; the half image height y' of the optical system and the focal length f of the optical system satisfy the relation: the | y'/f | is less than 0.75.
4. The high resolution large field of view industrial lens of claim 1, wherein: the focal length of the middle group T1 is fT1The focal length of the rear group T2 is fT2Wherein the middle group focal length fT1Ratio to focal length f of the optical system, back group focal length fT2The ratio of the optical system to the focal length f of the optical system respectively satisfies the following relation: 1.10 < | fT1/f|＜1.40；1.60＜|f T2/f|＜1.95。
5. The high resolution large field of view industrial lens of claim 1, wherein: the focal length of the first lens G1 is fG1Focal length f thereofG1And the ratio of the optical system to the focal length f of the optical system satisfies the relation: 1.90 < | fG1The/| < 2.30; the tenth lens G10 has a focal length fG10Focal length f thereofG10And the ratio of the optical system to the focal length f of the optical system satisfies the relation: 2.10 < | fG10The/| < 2.30; the focal length of the eleventh lens G11 is fG11Focal length f thereofG11And the ratio of the optical system to the focal length f of the optical system satisfies the relation: 1.85 < | fG11/f|＜2.20。
6. The high resolution large field of view industrial lens of claim 1, wherein: the focal length of the first cemented lens group U1 is fU1Focal length f thereofU1And the focal length f of the optical system satisfies the relation: 6.80 < | fU1The/| is less than 8.00; the focal length of the second cemented lens group U2 is fU2Focal length f thereofU2And the focal length f of the optical system satisfies the relation: 7.50 < | fU2The/| is less than 8.50; the focal length of the fourth cemented lens group U4 is fU4Focal length f thereofU4And the focal length f of the optical system satisfies the relation: 1.30 < | fU4The/| < 1.70; the focal length of the fifth cemented lens group U5 is fU5Focal length f thereofU5And the focal length f of the optical system satisfies the relation: 14.5 < (R) >|f U5/f|＜17.5。
7. The high resolution large field of view industrial lens of claim 1, wherein: when the object distance of the optical system is changed, the relative position of the fixed group S2 and the image plane is unchanged, and the air interval D between the focusing group S1 and the fixed group S2 is changedtTo make the image clear, wherein the air space DtThe ratio to the focal length f of the optical system satisfies the relation: i Dt/f|＜0.48。
8. The high resolution large field of view industrial lens of claim 1, wherein: each lens of the optical system is a spherical mirror, the aperture of the diaphragm of the optical system is a circular hole, and the aperture of the diaphragm is adjustable within the range of F4.5-F32.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112649952A (en) * | 2020-12-30 | 2021-04-13 | 广东奥普特科技股份有限公司 | High-resolution large-view-field industrial lens |
| WO2023216386A1 (en) * | 2022-05-11 | 2023-11-16 | 广东奥普特科技股份有限公司 | High-resolution wide-angle optical lens and optical device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649952A (en) * | 2020-12-30 | 2021-04-13 | 广东奥普特科技股份有限公司 | High-resolution large-view-field industrial lens |
| WO2023216386A1 (en) * | 2022-05-11 | 2023-11-16 | 广东奥普特科技股份有限公司 | High-resolution wide-angle optical lens and optical device |
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