CN114637126A - Optical image stabilizing lens and assembling method thereof - Google Patents

Optical image stabilizing lens and assembling method thereof Download PDF

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Publication number
CN114637126A
CN114637126A CN202210535867.1A CN202210535867A CN114637126A CN 114637126 A CN114637126 A CN 114637126A CN 202210535867 A CN202210535867 A CN 202210535867A CN 114637126 A CN114637126 A CN 114637126A
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CN
China
Prior art keywords
lens
optical image
barrel
front cover
space ring
Prior art date
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Granted
Application number
CN202210535867.1A
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Chinese (zh)
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CN114637126B (en
Inventor
朱海海
王克民
胡聪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Lianchuang Optical Co ltd
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Jiangxi Lianchuang Electronic Co Ltd
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Priority to CN202210535867.1A priority Critical patent/CN114637126B/en
Publication of CN114637126A publication Critical patent/CN114637126A/en
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Publication of CN114637126B publication Critical patent/CN114637126B/en
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/025Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue

Abstract

The invention relates to the technical field of lenses, in particular to an optical image stabilizing lens and an assembling method thereof. An optical image stabilizing lens comprises a lens barrel, a lens group, an elastic piece and a front cover, wherein the lens group comprises a first lens, a first step is arranged in the lens barrel, and the first lens is arranged on the first step; the upper part of the front cover is clamped with the first lens, and the lower part of the front cover is fixedly connected with the lens barrel; an elastic piece is arranged between the front cover and the first lens and applies axial pressing force to the first lens. The optical image stabilizing lens compresses the internal parts of the lens through the elasticity of the elastic piece, so that the internal parts of the lens are prevented from micro offset, the performance and the stability of the lens under severe working conditions are improved, and potential safety hazards are reduced; according to the assembling method of the optical image stabilizing lens, the gap between the internal part and the inner cavity of the lens cone is increased by adopting high-temperature baking, and the internal part of the lens is installed in place through the elasticity generated by the elastic part, so that the imaging stability is ensured.

Description

Optical image stabilizing lens and assembling method thereof
Technical Field
The invention relates to the technical field of lenses, in particular to an optical image stabilizing lens and an assembling method thereof.
Background
The lens generates an optical image to be projected onto the image sensor, converts an optical signal into an electric signal, and finally forms a clear and stable digital image, so that the lens is widely applied to the fields of vehicle-mounted, security protection, intelligent manufacturing and the like. The lens is used as a precise optical component, the requirement on manufacturing and mounting precision is strict, and the imaging performance of the lens is sensitive to factors such as lens spacing, an optical axis, diaphragm aperture and the like. And part of the lens is often used under the severe working conditions of high temperature, high humidity, high frequency vibration and the like, and the internal structure inevitably generates tiny deviation due to the thermal expansion property, the water absorption property and the manufacturing process of the lens material, so that the lens distance, the optical axis and the diaphragm aperture are changed, the performance of the lens is finally reduced, and clear imaging cannot be stably provided. In the field of vehicle-mounted work needing real-time image transmission and the like, accidents can even be caused, and great damage is caused to personal and property safety.
In addition, the lens is often mounted and inclined in the assembling process of internal parts, which affects the performance of the finished lens.
In summary, the structural design of the lens is necessary to be further optimized for the existing problem, so as to reduce the adverse effect of the assembly error on the performance of the lens and improve the stability of the imaging performance of the lens under the severe working conditions.
Disclosure of Invention
The present invention is directed to at least one of the problems of the prior art, and provides an optical image stabilizing lens and an assembling method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an optical image stabilizing lens comprises a lens barrel, a lens group, an elastic piece and a front cover, wherein the lens group comprises a first lens, a first step is arranged in the lens barrel, and the first lens is arranged on the first step; the upper part of the front cover is clamped with the first lens, and the lower part of the front cover is fixedly connected with the lens cone; an elastic piece is arranged between the front cover and the first lens and applies axial pressing force to the first lens; a waterproof ring is arranged between the first lens and the first step, the first lens comprises a lower optical inactive area, and the waterproof ring is in contact with the lower optical inactive area.
Further, the lens group further comprises a second lens and a third lens, and the first lens, the second lens and the third lens are sequentially arranged in the lens barrel from top to bottom.
Furthermore, a first space ring is arranged between the first lens and the second lens, and a second space ring is arranged between the second lens and the third lens.
Further, a second step and a third step are arranged in the lens barrel, the second lens is arranged on the second step, and the third lens is arranged on the third step.
Further, the diameters of the first step, the second step and the third step are sequentially decreased progressively.
Further, the first lens includes an upper optically inactive area, and the elastic member is in contact with the upper optically inactive area.
Furthermore, the bottom of the joint of the front cover and the lens cone is coated with sealant.
The invention also provides an assembling method of the optical image stabilizing lens, which comprises the following steps:
preparing a lens barrel, a lens group, an elastic piece, a front cover and a waterproof ring which need to be assembled, wherein the lens group comprises a first lens, a second lens and a third lens;
sequentially installing a third lens, a second space ring, a second lens and a first space ring into the lens barrel, wherein the third lens is installed on a third step, the second space ring is installed on the third lens, the second lens is installed on a second step, and the first space ring is installed on the second lens;
installing a waterproof ring on the first step, and installing a first lens on the first step and the waterproof ring;
the elastic member is mounted on the upper optically inactive area of the first lens, and the front cover is screwed to the lens barrel so that the elastic member is in a compressed state, and the elastic member applies a downward pressing force to the first lens.
Further, the thermal expansion coefficient of the lens barrel is larger than that of the lens group.
Further, the method also comprises the following steps:
testing the assembled lens, and judging whether the lens group, the first space ring and the second space ring are installed obliquely or not;
if not, the installation is finished;
if the lens is inclined, the lens is baked at high temperature, so that radial gaps among the lens barrel, the lens group, the first space ring and the second space ring are increased, downward pressing force is applied to the lens group, the first space ring and the second space ring by the elastic piece, the lens group, the first space ring and the second space ring are installed in place, and the installation is completed.
As can be seen from the above description of the present invention, compared with the prior art, the present invention includes at least one of the following advantages:
1. the optical image stabilizing lens compresses the internal parts of the lens through the elasticity of the elastic piece, so that the internal parts of the lens are prevented from micro offset, the performance and the stability of the lens under severe working conditions are improved, and potential safety hazards are reduced;
2. the optical image stabilizing lens has the advantages of simple structure, small volume and easy realization of automatic assembly;
3. according to the assembling method of the optical image stabilizing lens, when the internal parts of the lens are installed and inclined, the gap between the internal parts and the inner cavity of the lens barrel is increased by adopting high-temperature baking, and the internal parts of the lens are installed in place by the elasticity generated by the elastic part, so that the imaging stability is ensured;
4. the assembling method of the optical image stabilizing lens reduces the adverse effect of assembling errors on the performance of the lens and improves the manufacturing yield.
Drawings
FIG. 1 is a schematic cross-sectional view of an optical image stabilization lens according to a preferred embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a schematic sectional view of a lens barrel according to a preferred embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a first lens in a preferred embodiment of the invention;
FIG. 5 is a flowchart illustrating steps of a method for assembling an optical image stabilization lens according to a preferred embodiment of the present invention;
reference numerals: 1. a lens barrel; 2. a lens group; 3. an elastic member; 4. a front cover; 5. a waterproof ring; 11. a first step; 12. a second step; 13. a third step; 21. a first lens; 22. a second lens; 23. a third lens; 24. a first space ring; 25. a second space ring; 41. sealing glue; 211. an upper optically inactive area; 212. a lower optically inactive area.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 5, in a preferred embodiment of the present invention, an optical image stabilizing lens includes a lens barrel 1, a lens group 2, an elastic member 3, and a front cover 4, where the lens group 2 includes a first lens 21, a first step 11 is disposed in the lens barrel 1, and the first lens 21 is disposed on the first step 11; the upper part of the front cover 4 is clamped with the first lens 21, and the lower part of the front cover is fixedly connected with the lens barrel 1; an elastic member 3 is disposed between the front cover 4 and the first lens 21, and the elastic member 3 applies an axial pressing force to the first lens 21.
According to the optical image stabilization lens, the parts in the lens are tightly pressed through the elasticity of the elastic piece 3, so that the internal parts of the lens are prevented from micro deviation, the performance and the stability of the lens under severe working conditions are improved, and potential safety hazards are reduced; the optical image stabilizing lens has the advantages of simple structure, small volume and easy realization of automatic assembly.
As a preferred embodiment of the present invention, it may also have the following additional technical features:
in this embodiment, the lens group 2 further includes a second lens 22 and a third lens 23, and the first lens 21, the second lens 22 and the third lens 23 are sequentially disposed in the lens barrel 1 from top to bottom. The lens of the invention is also provided with the second lens 22 and the third lens 23, has simple integral structure, is convenient to assemble and is suitable for mass production.
In the present embodiment, a first spacer 24 is disposed between the first lens 21 and the second lens 22, and a second spacer 25 is disposed between the second lens 22 and the third lens 23. The first lens 21 and the second lens 22 are positioned by providing a first spacer 24 between the first lens 21 and the second lens 22, and the second lens 22 and the third lens 23 are positioned by providing a second spacer 25 between the second lens 22 and the third lens 23.
In the present embodiment, the second step 12 and the third step 13 are provided in the lens barrel 1, the second lens 22 is provided on the second step 12, and the third lens 23 is provided on the third step 13. The second lens 22 is supported by providing the second step 12 in the lens barrel 1, and the third lens 23 is supported by providing the third step 13 in the lens barrel 1.
In this embodiment, the diameters of the first step 11, the second step 12 and the third step 13 are sequentially decreased. Since the third lens 23, the second lens 22, and the first lens 21 are assembled from the inside to the outside in the assembling process, that is, the diameters of the first step 11, the second step 12, and the third step 13, which support the first lens 21, the second lens 22, and the third lens 23, respectively, are gradually reduced for the assembling.
In this embodiment, the first lens 21 includes an upper optically inactive area 211, and the elastic member 3 is in contact with the upper optically inactive area 211. The first lens 21 includes an optically effective area that substantially contributes to image formation and an optically ineffective area that is not affected by image formation, and is generally disposed at the periphery of the optically effective area, and the elastic member 3 is prevented from affecting the lens image formation by placing the elastic member 3 on the upper optically ineffective area 211.
In this embodiment, a waterproof ring 5 is disposed between the first lens 21 and the first step 11, the first lens 21 includes a lower optically inactive area 212, and the waterproof ring 5 is in contact with the lower optically inactive area 212. The waterproof ring 5 is arranged between the first lens 21 and the first step 11 to realize the internal sealing of the lens, the lens has waterproof performance, the waterproof ring 5 is in contact with the lower optical inactive area 212 to avoid the influence on the imaging of the lens, and the waterproof ring 5 can adopt a rubber sealing ring, but is not limited to the rubber sealing ring.
In this embodiment, the bottom of the junction of the front cover 4 and the lens barrel 1 is coated with a sealant 41. Through sealed glue 41 of bottom coating at protecgulum 4 and lens cone 1 junction to promote the inside leakproofness of camera lens, waterproof dustproof effect is better, and the lower part of protecgulum 4 can adopt threaded connection's mode with lens cone 1 to be fixed, the dismouting of being convenient for.
The invention also provides an assembling method of the optical image stabilizing lens, which comprises the following steps:
preparing a lens barrel 1, a lens group 2, an elastic part 3, a front cover 4 and a waterproof ring 5 which need to be assembled, wherein the lens group 2 comprises a first lens 21, a second lens 22 and a third lens 23;
sequentially installing a third lens 23, a second space ring 25, a second lens 22 and a first space ring 24 into the lens barrel 1, wherein the third lens 23 is installed on the third step 13, the second space ring 25 is installed on the third lens 23, the second lens 22 is installed on the second step 12, and the first space ring 24 is installed on the second lens 22;
mounting the waterproof ring 5 on the first step 11, and mounting the first lens 21 on the first step 11 and the waterproof ring 5;
the elastic member 3 is mounted on the upper optically ineffective area 211 of the first lens 21, and the front cover 4 is screwed to the lens barrel 1 so that the elastic member 3 is in a compressed state, and the elastic member 3 applies a downward pressing force to the first lens 21.
The assembling method of the optical image stabilizing lens reduces the adverse effect of assembling errors on the performance of the lens and improves the manufacturing yield.
In the present embodiment, the coefficient of thermal expansion of the lens barrel 1 is larger than that of the lens group 2. When the thermal expansion coefficient of the lens barrel 1 is greater than that of the lens group 2, the assembly of the lens can be adjusted by adopting a high-temperature baking process, and because the thermal expansion coefficient of the lens barrel 1 is greater, a gap can be generated between the lens barrel 1 and the lens group 2 so as to adjust the position, specifically, the lens barrel 1 can be made of a metal material, and the lens group 2 can be made of a glass material, but the invention is not limited to the above, for the first space ring 24 and the second space ring 25, the same metal material as the lens barrel 1 is usually adopted in production, and because the inner diameter of the lens barrel 1 is greater than the outer diameters of the first space ring 24 and the second space ring 25, a gap can be generated when the lens barrel is heated.
In this embodiment, the method further includes the following steps:
testing the assembled lens, and judging whether the lens group 2, the first space ring 24 and the second space ring 25 are installed obliquely or not; the test can adopt an imaging quality test mode, but is not limited to the imaging quality test mode;
if not, the installation is finished;
if the lens is inclined, the lens is baked at a high temperature, so that radial gaps between the lens barrel 1 and the lens group 2, the first space ring 24 and the second space ring 25 are increased, the elastic element 3 applies downward pressing force to the lens group 2, the first space ring 24 and the second space ring 25, and the lens group 2, the first space ring 24 and the second space ring 25 are installed in place, and the installation is completed.
According to the assembling method of the optical image stabilizing lens, when the internal parts of the lens are installed and inclined, a high-temperature baking process is adopted for the lens, as the thermal expansion coefficient of the lens barrel 1 is larger than that of the lens group 2, the effect of outward expansion of the heated lens barrel 1 is larger, the internal space is larger, the gap between the internal parts and the inner cavity of the lens barrel 1 is increased, the internal parts of the lens are extruded through the elasticity generated by the elastic part 3, the internal parts of the lens are installed in place, and the imaging stability is ensured.
The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.
It is to be understood that the present invention has been described with reference to certain embodiments and that various changes in form and details may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. An optical image stabilization lens is characterized in that: the lens assembly comprises a lens barrel (1), a lens group (2), an elastic piece (3) and a front cover (4), wherein the lens group (2) comprises a first lens (21), a first step (11) is arranged in the lens barrel (1), and the first lens (21) is arranged on the first step (11); the upper part of the front cover (4) is clamped with the first lens (21), and the lower part of the front cover is fixedly connected with the lens cone (1); an elastic piece (3) is arranged between the front cover (4) and the first lens (21), and the elastic piece (3) applies axial pressing force to the first lens (21); a waterproof ring (5) is arranged between the first lens (21) and the first step (11), the first lens (21) comprises a lower optical non-effective area (212), and the waterproof ring (5) is in contact with the lower optical non-effective area (212).
2. An optical image stabilization lens according to claim 1, characterized in that said lens group (2) further comprises a second lens (22) and a third lens (23), and said first lens (21), said second lens (22) and said third lens (23) are sequentially disposed from top to bottom in said lens barrel (1).
3. An optical image stabilization lens according to claim 2, characterized in that a first spacer (24) is arranged between the first lens (21) and the second lens (22), and a second spacer (25) is arranged between the second lens (22) and the third lens (23).
4. An optical image stabilization lens according to claim 2, characterized in that a second step (12) and a third step (13) are provided in the lens barrel (1), the second lens (22) is provided on the second step (12), and the third lens (23) is provided on the third step (13).
5. An optical image stabilization lens according to claim 4, characterized in that the diameters of the first step (11), the second step (12) and the third step (13) decrease in sequence.
6. An optical image stabilization lens according to claim 1, characterized in that the first lens (21) comprises an upper optically inactive area (211), the elastic element (3) being in contact with the upper optically inactive area (211).
7. An optical image stabilization lens according to claim 1, characterized in that the bottom of the junction of the front cover (4) and the barrel (1) is coated with a sealant (41).
8. An assembling method of an optical image stabilizing lens is characterized by comprising the following steps:
preparing a lens barrel (1), a lens group (2), an elastic piece (3), a front cover (4) and a waterproof ring (5) which need to be assembled, wherein the lens group (2) comprises a first lens (21), a second lens (22) and a third lens (23);
sequentially installing a third lens (23), a second space ring (25), a second lens (22) and a first space ring (24) into the lens barrel (1), wherein the third lens (23) is installed on a third step (13), the second space ring (25) is installed on the third lens (23), the second lens (22) is installed on a second step (12), and the first space ring (24) is installed on the second lens (22);
installing a waterproof ring (5) on the first step (11), and installing a first lens (21) on the first step (11) and the waterproof ring (5);
an elastic member (3) is mounted on an upper optically ineffective area (211) of the first lens (21), and a front cover (4) is screwed to the lens barrel (1) so that the elastic member (3) is in a compressed state, the elastic member (3) applying a downward pressing force to the first lens (21).
9. An assembly method of an optical image stabilization lens according to claim 8, characterized in that the coefficient of thermal expansion of the lens barrel (1) is larger than the coefficient of thermal expansion of the lens group (2).
10. An assembly method for an optical image stabilization lens according to claim 9, further comprising the steps of:
testing the assembled lens, and judging whether the lens group (2), the first space ring (24) and the second space ring (25) are installed and inclined;
if not, the installation is finished;
if the lens is inclined, the lens is baked at high temperature, so that radial gaps among the lens barrel (1), the lens group (2), the first space ring (24) and the second space ring (25) are increased, the elastic piece (3) applies downward pressing force to the lens group (2), the first space ring (24) and the second space ring (25), the lens group (2), the first space ring (24) and the second space ring (25) are installed in place, and installation is completed.
CN202210535867.1A 2022-05-18 2022-05-18 Optical image stabilizing lens and assembling method thereof Active CN114637126B (en)

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CN114637126B CN114637126B (en) 2022-09-13

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CN213042047U (en) * 2020-06-24 2021-04-23 鹤山市嘉米基光电科技有限公司 Stress lens
CN113721343A (en) * 2021-11-01 2021-11-30 华中光电技术研究所(中国船舶重工集团公司第七一七研究所) High-precision attitude sensor optical lens assembly test method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006292927A (en) * 2005-04-08 2006-10-26 Matsushita Electric Ind Co Ltd Lens unit and manufacturing method therefor
JP2006330120A (en) * 2005-05-24 2006-12-07 Smk Corp Camera module
JP2009244393A (en) * 2008-03-28 2009-10-22 Fujinon Corp Lens assembling method and imaging device
JP2010211079A (en) * 2009-03-12 2010-09-24 Sigma Corp Method of assembling optical correction unit, optical correction unit, and lens barrel and imaging device having optical correction unit
US20160195690A1 (en) * 2012-12-20 2016-07-07 Raytheon Canada Limited Optical assembly
CN108780206A (en) * 2016-03-03 2018-11-09 宁波舜宇光电信息有限公司 MEMS devices for lens barrel positioning
CN109791270A (en) * 2016-08-12 2019-05-21 奥普托图尼康苏默尔股份公司 Optical device, especially camera especially include the automatic camera focused with image stabilization
JP2019109381A (en) * 2017-12-19 2019-07-04 マクセル株式会社 Lens unit and camera module
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CN113721343A (en) * 2021-11-01 2021-11-30 华中光电技术研究所(中国船舶重工集团公司第七一七研究所) High-precision attitude sensor optical lens assembly test method

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Address after: 230088 A2-06, Floor 14, Block A, Building J1, Phase II, Innovation Industrial Park, No. 2800, Innovation Avenue, High tech Zone, Hefei, China (Anhui) Pilot Free Trade Zone, Hefei, Anhui Province

Patentee after: Hefei Lianchuang Optical Co.,Ltd.

Address before: 330096 No. 1699, Jingdong Avenue, Nanchang high tech Industrial Development Zone, Nanchang City, Jiangxi Province

Patentee before: Lianchuang Electronic Technology Co.,Ltd.

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Denomination of invention: An optical image stabilization lens and its assembly method

Effective date of registration: 20231218

Granted publication date: 20220913

Pledgee: Anhui pilot Free Trade Zone Hefei area sub branch of Huishang Bank Co.,Ltd.

Pledgor: Hefei Lianchuang Optical Co.,Ltd.

Registration number: Y2023980072240

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Granted publication date: 20220913

Pledgee: Anhui pilot Free Trade Zone Hefei area sub branch of Huishang Bank Co.,Ltd.

Pledgor: Hefei Lianchuang Optical Co.,Ltd.

Registration number: Y2023980072240