阅读说明：本技术 一种电致变色镜片的贴合工艺及电致变色镜片 (Attaching process of electrochromic lens and electrochromic lens ) 是由 陈烨玥 童彬彬 马广剑 于 2021-09-16 设计创作，主要内容包括：本发明公开了一种电致变色镜片的贴合工艺及电致变色镜片,包括步骤S1：对波导片及变色片的进行清洁；步骤S2:沿变色片的贴合面的边缘形成环绕一周的第一OCA胶墙,第一OCA胶墙上预留有若干个第一开口；步骤S3:将若干T型限位插片分别插入第一开口内,在第一开口处涂布UV解粘胶黏剂以形成对第二开口进行遮挡及固定限位插片的胶块；步骤S4：在T型限位插片的限位引导下使波导片与变色片对位后抵触完成预固定；步骤S5：将波导片和变色片放入贴合机内部,贴合机对波导片和变色片进行压合形成电致变色镜片；步骤S6:对压合完成的电致变色镜片进行紫外光照射,降低UV解粘胶黏剂的黏性后移除UV解粘胶黏剂后对第一开口填充密封完成贴合。(The invention discloses a bonding process of an electrochromic lens and the electrochromic lens, which comprises the following steps of S1: cleaning the waveguide sheet and the color changing sheet; step S2, forming a first OCA glue wall surrounding a circle along the edge of the binding surface of the color-changing sheet, wherein a plurality of first openings are reserved on the first OCA glue wall; step S3, inserting a plurality of T-shaped limiting insertion pieces into the first openings respectively, and coating UV viscose glue on the first openings to form rubber blocks for shielding the second openings and fixing the limiting insertion pieces; step S4: aligning the waveguide sheet and the color-changing sheet under the limit guidance of the T-shaped limit inserting sheet, and then butting to finish pre-fixing; step S5: placing the waveguide sheet and the color-changing sheet into a laminating machine, and laminating the waveguide sheet and the color-changing sheet by the laminating machine to form an electrochromic lens; and step S6, performing ultraviolet irradiation on the laminated electrochromic lens, reducing the viscosity of the UV debonding adhesive, removing the UV debonding adhesive, and filling and sealing the first opening to complete the lamination.)

1. The fitting process of the electrochromic lens is characterized by comprising the following steps of:

step S1: cleaning the waveguide sheet and the color changing sheet;

step S2, forming a first OCA glue wall surrounding a circle along the edge of the binding surface of the color changing sheet, wherein a plurality of first openings are reserved on the first OCA glue wall;

step S3, inserting a plurality of T-shaped limiting insertion sheets into the first openings respectively, and coating UV viscose glue on the first openings to form rubber blocks for shielding the second openings and fixing the limiting insertion sheets;

step S4: aligning the waveguide sheet and the color-changing sheet under the limit guidance of the T-shaped limit inserting sheet, and then butting to finish pre-fixing;

step S5: placing the waveguide sheet and the color-changing sheet into a laminating machine, and laminating the waveguide sheet and the color-changing sheet by the laminating machine to form an electrochromic lens;

and step S6, performing ultraviolet irradiation on the laminated electrochromic lens, reducing the viscosity of the UV debonding adhesive, removing the UV debonding adhesive, and filling and sealing the first opening to complete the lamination.

2. The process of claim 1, wherein a step S3-1 of forming a second OCA glue wall around the periphery of the bonding surface of the waveguide sheet is further included between the step S3 and the step S4.

3. The attaching process of an electrochromic lens according to claim 2, wherein the step S4 of completing the pre-fixing specifically comprises: make the first OCA on the color chip glue the wall with the binding face of waveguide piece is contradicted, second OCA on the waveguide piece glue the wall with the binding face of color chip is contradicted, just second OCA glues the wall and is located first OCA and glues the wall and first OCA glues the wall with it is formed with the packing clearance to glue between the wall to the second OCA.

4. The process of claim 3, wherein the step S6 of filling and sealing the first opening comprises the following specific steps:

step S6-1: injecting LOCA liquid glue between the waveguide sheet and the color-changing sheet through the first openings until the filling gaps are filled;

step S6-2, ultraviolet irradiation is carried out on the electrochromic lens until all LOCA liquid glue is cured and formed;

step S6-3: and carrying out secondary cleaning on the electrochromic lens.

5. The attaching process of the electrochromic lens according to claim 4, wherein the step S6-2 of irradiating the electrochromic lens with ultraviolet light specifically comprises initial fixing and reinforcing, wherein the initial fixing is to respectively irradiate the surfaces, far away from each other, of the waveguide sheet and the color-changing sheet with ultraviolet light, the initial fixing duration of the ultraviolet light irradiation is 25 to 35S, the reinforcing is to irradiate the side surfaces of the electrochromic lens with ultraviolet light, and the reinforcing duration of the ultraviolet light irradiation is 20 to 30S.

6. The attaching process of the electrochromic lens according to claim 4, wherein the second cleaning in step S6-3 includes removing the residual LOCA liquid glue at each first opening, and the specific step of removing the residual LOCA liquid glue at each second opening is to wipe the second opening with absolute alcohol, and scrape the LOCA liquid glue at the second opening extending out of the electrochromic lens to be flush with the side surface of the electrochromic lens by means of a scraper.

7. The attaching process of the electrochromic lens according to claim 1, wherein the step of cleaning in step S1 is cleaning and baking, the cleaning is specifically to clean the waveguide sheet and the color-changing sheet in an ultrasonic cleaning machine, the ultrasonic cleaning frequency is 75-85KHz, the ultrasonic cleaning time is 4-8min, the baking is specifically to bake the cleaned waveguide sheet and the color-changing sheet in a baking machine, the baking temperature is 30-33 ℃, and the baking time is 3-4 min.

8. The process of claim 3, wherein the width of the filling gap is in the range of 1-1.5 mm.

9. The laminating process of electrochromic lens according to claim 1, wherein the T-shaped spacing insertion sheet comprises a spacing riser and a spacing cross piece, one end of the spacing cross piece is connected with the middle portion of the spacing riser to separate the spacing riser into a collision portion and a spacing portion, the collision portion is used for colliding with the side surface of the color changing piece, the spacing portion is used for colliding with the edge of the waveguide piece to guide the same for spacing, and one end of the spacing cross piece away from the spacing riser is used for inserting into the first opening.

10. An electrochromic lens, characterized in that: the electrochromic lens is prepared by the attaching process of the electrochromic lens as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of electrochromic lenses, in particular to a laminating process of an electrochromic lens and the electrochromic lens.

Background

Electrochromism is a phenomenon in which optical properties (reflectivity, transmittance, absorption, and the like) of a material undergo a stable and reversible color change under the action of an applied electric field, and is visually represented as a reversible change in color and transparency. The effect has the advantages of large modulation range, continuous change, memory function, low power consumption and the like, so that development of display devices, automobile rearview mirrors, building glass and the like by utilizing the effect becomes a hot spot of wide attention.

The existing electrochromic lens comprises a color-changing sheet and a waveguide sheet, wherein the color-changing sheet needs to be attached to the waveguide sheet after conductive silver paste is printed, an OCA (optically clear adhesive) tape or LOCA (liquid optically clear adhesive) is generally used for attaching the color-changing sheet and the waveguide sheet at present, the waveguide sheet and the color-changing sheet need to be attached to each other in an alignment way before being put into an attaching machine to complete the attachment, but the alignment is inaccurate due to the fact that deviation is easily generated in the alignment process, and the attachment yield of the lens is low.

Disclosure of Invention

The invention aims to provide a laminating process of an electrochromic lens, which has the advantages of accurate alignment and high yield.

The technical purpose of the invention is realized by the following technical scheme:

the fitting process of the electrochromic lens comprises the following steps:

step S1: cleaning the waveguide sheet and the color changing sheet;

step S2, forming a first OCA glue wall surrounding a circle along the edge of the binding surface of the color changing sheet, wherein a plurality of first openings are reserved on the first OCA glue wall;

step S3, inserting a plurality of T-shaped limiting insertion sheets into the first openings respectively, and coating UV viscose glue on the first openings to form rubber blocks for shielding the second openings and fixing the limiting insertion sheets;

step S4: aligning the waveguide sheet and the color-changing sheet under the limit guidance of the T-shaped limit inserting sheet, and then butting to finish pre-fixing;

step S5: placing the waveguide sheet and the color-changing sheet into a laminating machine, and laminating the waveguide sheet and the color-changing sheet by the laminating machine to form an electrochromic lens;

and step S6, performing ultraviolet irradiation on the laminated electrochromic lens, reducing the viscosity of the UV debonding adhesive, removing the UV debonding adhesive, and filling and sealing the first opening to complete the lamination.

Further setting: and a step S3-1 of forming a second OCA glue wall surrounding the periphery along the edge of the attaching surface of the waveguide piece is further included between the step S3 and the step S4.

Further setting: the step S4 of completing the pre-fixing specifically includes: make the first OCA on the color chip glue the wall with the binding face of waveguide piece is contradicted, second OCA on the waveguide piece glue the wall with the binding face of color chip is contradicted, just second OCA glues the wall and is located first OCA and glues the wall and first OCA glues the wall with it is formed with the packing clearance to glue between the wall to the second OCA.

Further setting: the filling and sealing of the first opening in the step S6 includes the following specific steps:

step S6-1: injecting LOCA liquid glue between the waveguide sheet and the color-changing sheet through the first openings until the filling gaps are filled;

step S6-2, ultraviolet irradiation is carried out on the electrochromic lens until all LOCA liquid glue is cured and formed;

step S6-3: and carrying out secondary cleaning on the electrochromic lens.

Further setting: the specific step of performing ultraviolet irradiation on the electrochromic lens in the step S6-2 includes initial fixation and reinforcement, the initial fixation is to perform ultraviolet irradiation on the surfaces, away from each other, of the waveguide sheet and the color-changing sheet, the ultraviolet irradiation time in the initial fixation is 25-35S, the reinforcement is to perform ultraviolet irradiation on the side surface of the electrochromic lens, and the ultraviolet irradiation time in the reinforcement is 20-30S.

Further setting: the secondary cleaning in the step S6-3 includes removing the residual LOCA liquid glue at each first opening, and the specific step of removing the residual LOCA liquid glue at each second opening is to wipe the second opening with absolute alcohol, and scrape the LOCA liquid glue at the second opening, which extends out of the color-changing lens, to be flush with the side face of the electrochromic lens by means of a scraper.

Further setting: the cleaning in the step S1 is cleaning and baking, wherein the cleaning specifically comprises the step of putting the waveguide sheet and the color changing sheet into an ultrasonic cleaning machine for cleaning, the ultrasonic cleaning frequency is 75-85KHz, the ultrasonic cleaning time is 4-8min, the baking specifically comprises the step of putting the cleaned waveguide sheet and the color changing sheet into a baking machine for baking, the baking temperature is 30-33 ℃, and the baking time is 3-4 min.

Further setting: the width of the filling gap ranges from 1 mm to 1.5 mm.

Further setting: the spacing inserted sheet of T type includes spacing riser and spacing horizontal lamella, the one end of spacing horizontal lamella with the middle part of spacing riser is connected and is separated into conflict portion and spacing portion with spacing riser, conflict portion be used for with the side of discolouring piece is contradicted, spacing portion be used for with the marginal conflict of waveguide piece is spacing to its guide, spacing horizontal lamella is kept away from the one end of spacing riser is used for inserting first opening.

By adopting the technical scheme, the method has the advantages that,

it is another object of the present invention to provide an electrochromic lens.

The technical purpose of the invention is realized by the following technical scheme:

an electrochromic lens is prepared by the laminating process of the electrochromic lens.

In conclusion, the invention has the following beneficial effects: insert the spacing horizontal piece of the spacing inserted sheet of T type in first opening, make conflict portion contradict with the side of piece that becomes the look, when counterpointing, guide spacing to the waveguide piece through the spacing portion of the spacing inserted sheet of a plurality of T types, make the waveguide piece fix the within range that the spacing inserted sheet of a plurality of T types encloses, guaranteed the accurate nature of counterpointing, can not produce the deviation. Fix the spacing inserted sheet of T type through UV debonding adhesive, only need to reduce its stickness and just can get rid of the spacing piece of T type to the UV debonding adhesive irradiation ultraviolet ray of first opening part after accomplishing waveguide piece and the laminating of piece that becomes the look, convenient to use easy operation, and the spacing piece of T type can be used repeatedly, the cost is reduced. Glue the wall through the first OCA on the discoloration piece and glue the wall with the second OCA on the waveguide piece and glue and bond each other, the adhesive strength is improved, and because if carry out the full laminating, thereby can influence the propagation of light in the waveguide piece and influence and show image quality effect, if only ordinary frame pastes, middle air bed can receive the dust and the steam pollution of environment in long-time use, influence the use of lens, it is full of the packing clearance to inject LOCA liquid glue in the packing clearance through first opening, on the basis that the inside cavity of assurance electrochromic lens does not influence the formation of image effect, make discoloration piece and waveguide piece closely laminate, isolated dust and steam get into in the inside air layer, the cleanliness factor of lens has been guaranteed, service life is prolonged.

Drawings

Fig. 1 is a structural schematic diagram of a T-shaped limiting insertion sheet.

In the figure, 1, a waveguide sheet; 2. a color-changing sheet; 3. t-shaped limiting insertion pieces; 31. a limiting transverse sheet; 32. a limiting part; 33. a collision part.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1:

as shown in fig. 1, a fitting process of an electrochromic lens includes the following steps:

step S1: cleaning the waveguide sheet 1 and the color-changing sheet 2;

step S2, forming a first OCA glue wall surrounding the periphery along the edge of the binding surface of the color changing sheet 2, wherein a plurality of first openings are reserved on the first OCA glue wall;

step S3, inserting a plurality of T-shaped limiting insertion pieces 3 into the first openings respectively, and coating UV viscose glue on the first openings to form rubber blocks for shielding the second openings and fixing the limiting insertion pieces;

step S4: the waveguide sheet 1 and the color changing sheet 2 are aligned under the limit guidance of the T-shaped limit inserting sheet 3 and then abutted to complete pre-fixing;

step S5: placing the waveguide sheet 1 and the color changing sheet 2 into a laminating machine, and laminating the waveguide sheet 1 and the color changing sheet 2 by the laminating machine to form an electrochromic lens;

and step S6, performing ultraviolet irradiation on the laminated electrochromic lens, reducing the viscosity of the UV debonding adhesive, removing the UV debonding adhesive, and filling and sealing the first opening to complete the lamination.

Wherein, the spacing inserted sheet of T type 3 is including spacing riser and spacing horizontal lamella 31, the one end of spacing horizontal lamella 31 with the middle part of spacing riser is connected and is separated into conflict portion 33 and spacing portion 32 with spacing riser, conflict portion 33 be used for with discolour piece 2's side is contradicted, spacing portion 32 be used for with wave guide piece 1's marginal conflict is spacing to its guide, spacing horizontal lamella 31 is kept away from the one end of spacing riser is used for inserting first opening. Insert first opening with spacing horizontal piece 31 of the spacing inserted sheet of T type 3 in, make conflict portion 33 contradict with the side of discolouring piece 2, when counterpointing, make the side of waveguide piece 1 contradict with spacing portion 32 of the spacing inserted sheet of every T type 3, spacing portion 32 through the spacing inserted sheet of a plurality of T types 3 guides waveguide piece 1 spacingly, make waveguide piece 1 restrict the within range that the spacing inserted sheet of a plurality of T types 3 encloses all the time, the accuracy of counterpointing has been guaranteed, can not produce the deviation. It fixes to the spacing inserted sheet 3 of T type to cross UV and separate the viscose gluing agent, only needs to separate the viscose gluing agent to the UV of first opening part and shine ultraviolet ray and reduce its stickness and just can get rid of the spacing piece of T type after accomplishing waveguide piece 1 and the laminating of color-changing piece 2, convenient to use easy operation, and the spacing piece of T type can use repeatedly, the cost is reduced. The cleaning in the step S1 is cleaning and baking, the cleaning specifically comprises the step of putting the waveguide sheet 1 and the color changing sheet 2 into an ultrasonic cleaning machine for cleaning, the ultrasonic cleaning frequency is 75-85KHz, the ultrasonic cleaning time is 4-8min, and the baking specifically comprises the step of putting the cleaned waveguide sheet 1 and the color changing sheet 2 into a baking machine for baking, the baking temperature is 30-33 ℃, and the baking time is 3-4 min.

Example 2:

as shown in fig. 1, a fitting process of an electrochromic lens includes the following steps:

step S1: cleaning the waveguide sheet 1 and the color-changing sheet 2;

step S2, forming a first OCA glue wall surrounding the periphery along the edge of the binding surface of the color changing sheet 2, wherein a plurality of first openings are reserved on the first OCA glue wall;

step S3, inserting a plurality of T-shaped limiting insertion pieces 3 into the first openings respectively, and coating UV viscose glue on the first openings to form rubber blocks for shielding the second openings and fixing the limiting insertion pieces;

step S3-1, forming a second OCA rubber wall surrounding a circle along the edge of the binding surface of the waveguide sheet 1;

step S4: the waveguide sheet 1 and the color changing sheet 2 are aligned under the limit guidance of the T-shaped limit inserting sheet 3 and then abutted to complete pre-fixing;

step S5: placing the waveguide sheet 1 and the color changing sheet 2 into a laminating machine, and laminating the waveguide sheet 1 and the color changing sheet 2 by the laminating machine to form an electrochromic lens;

and step S6, performing ultraviolet irradiation on the laminated electrochromic lens, reducing the viscosity of the UV debonding adhesive, removing the UV debonding adhesive, and filling and sealing the first opening to complete the lamination.

Wherein, the spacing inserted sheet of T type 3 is including spacing riser and spacing horizontal lamella 31, the one end of spacing horizontal lamella 31 with the middle part of spacing riser is connected and is separated into conflict portion 33 and spacing portion 32 with spacing riser, conflict portion 33 be used for with discolour piece 2's side is contradicted, spacing portion 32 be used for with wave guide piece 1's marginal conflict is spacing to its guide, spacing horizontal lamella 31 is kept away from the one end of spacing riser is used for inserting first opening.

The step S4 of completing the pre-fixing specifically includes: make the first OCA on the piece that becomes colour film 2 glue the wall with the binding face of wave guide piece 1 is contradicted, second OCA on the wave guide piece 1 glue the wall with the binding face of the piece that becomes colour film 2 is contradicted, just the second OCA glues the wall and is located first OCA and glues the wall and first OCA glues and be formed with the packing clearance between the wall is glued to the second OCA.

The filling and sealing of the first opening in the step S6 includes the following specific steps:

step S6-1: injecting LOCA liquid glue between the waveguide sheet 1 and the color changing sheet 2 through the first openings until the filling gaps are filled;

step S6-2, ultraviolet irradiation is carried out on the electrochromic lens until all LOCA liquid glue is cured and formed;

step S6-3: and carrying out secondary cleaning on the electrochromic lens.

The specific step of performing ultraviolet irradiation on the electrochromic lens in the step S6-2 includes initial fixation and reinforcement, the initial fixation is to perform ultraviolet irradiation on the surfaces, away from each other, of the waveguide sheet 1 and the color-changing sheet 2, the ultraviolet irradiation duration in the initial fixation is 25-35S, the reinforcement is to perform ultraviolet irradiation on the side surface of the electrochromic lens, and the ultraviolet irradiation duration in the reinforcement is 20-30S.

The secondary cleaning in the step S6-3 includes removing the residual LOCA liquid glue at each first opening, and the specific step of removing the residual LOCA liquid glue at each second opening is to wipe the second opening with absolute alcohol, and scrape the LOCA liquid glue at the second opening, which extends out of the color-changing lens, to be flush with the side face of the electrochromic lens by means of a scraper.

Because if carry out the full laminating, thereby can influence the propagation of light in waveguide piece 1 and influence the display image quality effect, if only ordinary frame pastes, middle air bed can receive the dust and the steam pollution of environment in long-time use, influence the use of lens, it is full of the packing clearance to inject LOCA liquid glue in the packing clearance through first opening, on the basis that guarantees that the inside cavity of electrochromic lens does not influence the formation of image effect, make color-changing piece 2 and waveguide piece 1 closely laminate, isolated dust and steam get into in the inside air bed, the cleanliness factor of lens has been guaranteed, and service life is prolonged. Simultaneously, the LOCA liquid glue is injected by the first opening for fixing the T-shaped limiting inserting sheet 3, the use is convenient, the additional treatment is not needed,

the cleaning in the step S1 is cleaning and baking, the cleaning specifically comprises the step of putting the waveguide sheet 1 and the color changing sheet 2 into an ultrasonic cleaning machine for cleaning, the ultrasonic cleaning frequency is 75-85KHz, the ultrasonic cleaning time is 4-8min, and the baking specifically comprises the step of putting the cleaned waveguide sheet 1 and the color changing sheet 2 into a baking machine for baking, the baking temperature is 30-33 ℃, and the baking time is 3-4 min. The width range of the filling gap is 1-1.5mm, the area is reduced in the range on the basis of ensuring the attaching tightness of the waveguide sheet 1 and the color-changing sheet 2, and the influence on the main color-changing area of the electrochromic lens is avoided.

Example 3:

an electrochromic lens is prepared by the following process steps:

step S1: cleaning the waveguide sheet 1 and the color-changing sheet 2;

step S2, forming a first OCA glue wall surrounding the periphery along the edge of the binding surface of the color changing sheet 2, wherein a plurality of first openings are reserved on the first OCA glue wall;

step S3, inserting a plurality of T-shaped limiting insertion pieces 3 into the first openings respectively, and coating UV viscose glue on the first openings to form rubber blocks for shielding the second openings and fixing the limiting insertion pieces;

step S3-1, forming a second OCA rubber wall surrounding a circle along the edge of the binding surface of the waveguide sheet 1;

step S4: the waveguide sheet 1 and the color changing sheet 2 are aligned under the limit guidance of the T-shaped limit inserting sheet 3 and then abutted to complete pre-fixing;

step S5: placing the waveguide sheet 1 and the color changing sheet 2 into a laminating machine, and laminating the waveguide sheet 1 and the color changing sheet 2 by the laminating machine to form an electrochromic lens;

and step S6, performing ultraviolet irradiation on the laminated electrochromic lens, reducing the viscosity of the UV debonding adhesive, removing the UV debonding adhesive, and filling and sealing the first opening to complete the lamination.

The step S4 of completing the pre-fixing specifically includes: make the first OCA on the piece that becomes colour film 2 glue the wall with the binding face of wave guide piece 1 is contradicted, second OCA on the wave guide piece 1 glue the wall with the binding face of the piece that becomes colour film 2 is contradicted, just the second OCA glues the wall and is located first OCA and glues the wall and first OCA glues and be formed with the packing clearance between the wall is glued to the second OCA.

The filling and sealing of the first opening in the step S6 includes the following specific steps:

step S6-1: injecting LOCA liquid glue between the waveguide sheet 1 and the color changing sheet 2 through the first openings until the filling gaps are filled;

step S6-2, ultraviolet irradiation is carried out on the electrochromic lens until all LOCA liquid glue is cured and formed;

step S6-3: and carrying out secondary cleaning on the electrochromic lens.

The specific step of performing ultraviolet irradiation on the electrochromic lens in the step S6-2 includes initial fixation and reinforcement, the initial fixation is to perform ultraviolet irradiation on the surfaces, away from each other, of the waveguide sheet 1 and the color-changing sheet 2, the ultraviolet irradiation duration in the initial fixation is 25-35S, the reinforcement is to perform ultraviolet irradiation on the side surface of the electrochromic lens, and the ultraviolet irradiation duration in the reinforcement is 20-30S.

The secondary cleaning in the step S6-3 includes removing the residual LOCA liquid glue at each first opening, and the specific step of removing the residual LOCA liquid glue at each second opening is to wipe the second opening with absolute alcohol, and scrape the LOCA liquid glue at the second opening, which extends out of the color-changing lens, to be flush with the side face of the electrochromic lens by means of a scraper.

The cleaning in the step S1 is cleaning and baking, the cleaning specifically comprises the step of putting the waveguide sheet 1 and the color changing sheet 2 into an ultrasonic cleaning machine for cleaning, the ultrasonic cleaning frequency is 75-85KHz, the ultrasonic cleaning time is 4-8min, and the baking specifically comprises the step of putting the cleaned waveguide sheet 1 and the color changing sheet 2 into a baking machine for baking, the baking temperature is 30-33 ℃, and the baking time is 3-4 min. The width range of the filling gap is 1-1.5mm, the area is reduced in the range on the basis of ensuring the attaching tightness of the waveguide sheet 1 and the color-changing sheet 2, and the influence on the main color-changing area of the electrochromic lens is avoided.

The electrochromic lens prepared by the steps is high in yield, and dust and water vapor are isolated from entering the internal air layer, so that the cleanliness of the lens is guaranteed, and the service life of the lens is long.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.