CN115091665A - Preparation method of myopia-preventing glasses lens mold with gradual compound eye structure - Google Patents
Preparation method of myopia-preventing glasses lens mold with gradual compound eye structure Download PDFInfo
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- CN115091665A CN115091665A CN202210837155.5A CN202210837155A CN115091665A CN 115091665 A CN115091665 A CN 115091665A CN 202210837155 A CN202210837155 A CN 202210837155A CN 115091665 A CN115091665 A CN 115091665A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
- B23K26/364—Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
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- Optics & Photonics (AREA)
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Abstract
The invention discloses a method for preparing a myopia prevention spectacle lens mold with a gradual change type compound eye structure, which comprises the following steps: s1, cleaning a substrate: performing ultrasonic bath, removing impurities, and drying for later use; s2, substrate fixing and ablation preparation: fixing the substrate on a three-dimensional precision workbench, and focusing the femtosecond laser beam on the surface of the substrate; s3, femtosecond laser modification: forming ablation craters in orderly arrangement; s4, wet etching: and performing ultrasonic bath chemical corrosion. The invention adopts the femtosecond laser humidifying method to process the compound eye structure template with specific numerical aperture, specific appearance and specific focal length on the surface of the substrate, has high technology efficiency, strong controllability and high precision, can form a large-scale micro-lens array on the substrate, and can further prepare the myopia-preventing glasses lens with the gradual change compound eye structure in a large batch, fast and low cost by a template copying method, thereby meeting the requirements of wide myopia patients.
Description
Technical Field
The invention relates to the technical field of micromachining of optical devices, in particular to a method for preparing a myopia prevention spectacle lens mold with a gradual compound eye structure.
Background
In recent years, myopia has become a significant threat to visual health. The prevalence rate of myopia increases sharply and tends to be low-aged. Myopia is irreversible once it occurs and as myopia progresses, the risk of developing complications of myopia increases, which can seriously affect visual health. It has been shown that the use of peripheral defocus is effective in slowing the progression of myopia. The myopia-preventing lens of the type has an out-of-focus area formed by a micro-lens array. In this lens, light rays pass through different dioptric regions, focusing an image on the retina of the eye such that light rays incident on the spectacle lens are focused at a position closer to the object than the predetermined position, thereby inhibiting the progression of myopia.
At present, the lens capable of gradually adjusting the cone angle of the eye can inhibit the myopia development, the lens is prepared by a cutting technology traditionally, the method is low in efficiency and high in cost, the lens is in a gradual change type, so that the laser energy in the process of ablating the inner ring and the outer ring cannot be well controlled in a laser ablation mode, and at the moment, the mold for preparing the myopia prevention glasses lens with the gradual change type compound eye structure is significant in high efficiency and low cost.
Disclosure of Invention
The invention aims to provide a method for preparing a myopia prevention glasses lens mold with a gradual change type compound eye structure on a substrate, wherein a compound eye structure template with a specific numerical aperture, a specific shape and a specific focal length is processed on the surface of the substrate by a femtosecond laser humidifying method etching processing method, the technology is efficient, strong in controllability and high in precision, a large-scale micro-lens forming array can be formed on the substrate, and then myopia prevention glasses lenses with the gradual change type compound eye structure can be prepared in a large-scale, rapid and low-cost mode by a template copying method, so that the requirements of wide myopia patients are met, and the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for preparing a myopia prevention spectacle lens mold with a gradual change type compound eye structure comprises the following steps:
s1, cleaning a substrate: carrying out ultrasonic bath on the substrate by an ultrasonic cleaner, removing impurities on the surface of the substrate, and drying for later use;
s2, substrate fixing and ablation preparation: fixing a substrate on a three-dimensional precision workbench, starting a femtosecond laser, and focusing a femtosecond laser beam on the surface of the substrate through an optical focusing lens;
s3, femtosecond laser modification: controlling the movement of a three-dimensional precise workbench through a computer program to enable a femtosecond laser beam focus to form orderly-arranged ablation craters on the surface of a substrate, wherein the distance between two adjacent ablation craters of a first ring at the inner side is 100 micrometers, the distance between two adjacent ablation craters of a second ring is 165 micrometers, the distance between the second ring and the first ring is 33 micrometers, and the distances between two adjacent ablation points on the two adjacent rings and the same ring are gradually increased by 65 micrometers, so that a central effective light forming area and a peripheral defocusing forming area which are positioned between the center and the periphery of the substrate are formed on the substrate, wherein the unprocessed area of the central area is a central effective light forming area, and the peripheral defocusing forming area is formed by gradually arranging the ablation craters around the central effective light forming area;
s4, wet etching: placing the modified substrate in a corrosive liquid, carrying out ultrasonic bath chemical corrosion, and utilizing selective corrosion of the corrosive liquid to enable the corrosion rate of the ablated crater area and the surrounding modified area to be far greater than that of the unmodified area, after a period of corrosion, forming a peripheral defocusing forming area of a closely-arranged circular or regular polygonal structure by the ablated crater area and the surrounding modified area, and finally forming the myopia prevention spectacle lens mold with a gradual change type compound eye structure with a smooth surface.
Preferably, in the S1, acetone, alcohol and deionized water are sequentially added into the ultrasonic cleaner to perform ultrasonic bath on the substrate, and the cleaning time is 5-15 min.
Preferably, in the method for manufacturing a mold for an anti-myopia spectacle lens with a gradual compound eye structure according to the present invention, the initial energy of the femtosecond laser beam emitted by the femtosecond laser device focused on the substrate surface in S2 is 3 MW.
As a preferable method for manufacturing the anti-myopia spectacle lens mold with the gradual change compound eye structure, in S2, the numerical aperture NA of the optical focusing lens is 0.8.
Preferably, in the preparation method of the myopia-preventing spectacle lens mold with the gradual change type compound eye structure, in the step S3, the femtosecond laser emits the femtosecond laser beam with the pulse width of 50fs, the central wavelength of 800nm and the repetition frequency of 1 KHz.
Preferably, in the method for manufacturing a mold for a myopia prevention eyeglass lens with a progressive compound eye structure, the central effective light forming region in S3 is a circular region with a central diameter of 3 to 9 mm of the substrate or a regular polygon region with a symmetry axis of 3 to 9 mm.
Preferably, in the method for manufacturing an anti-myopia spectacle lens mold with a gradual change compound eye structure according to the present invention, the ablation craters on the substrate in S3 are arranged in 20 to 40 rings around the central effective light forming area in a circular or regular polygonal manner.
Preferably, in the preparation method of the myopia prevention eyeglass lens mold with the gradual compound eye structure, the etching solution in the step S4 is a hydrofluoric acid solution with a concentration of 5-10%.
Preferably, in the method for preparing a myopia prevention spectacle lens mold with a gradual compound eye structure, the corrosion temperature of the acid solution in the step S4 is 20-50 ℃ when the acid solution is subjected to ultrasonic bath chemical corrosion.
Preferably, the method for preparing the myopia prevention spectacle lens mold with the gradual change type compound eye structure is that the myopia prevention spectacle lens mold with the gradual change type compound eye structure formed in the step S4 is sequentially added with alcohol and deionized water in an ultrasonic cleaner for ultrasonic bath for 5-15 min, and then is placed in a vacuum drying oven for drying.
Compared with the prior art, the invention has the beneficial effects that:
the compound eye structure template with the specific numerical aperture, the specific morphology and the specific focal length is processed on the surface of the substrate by adopting the femtosecond laser humidifying method etching processing method, compared with the traditional cutting technology preparation method, the femtosecond laser humidifying method etching technology has high efficiency, strong controllability and high precision, can form a large-scale micro-lens forming array on the substrate, and further can prepare the myopia prevention glasses lens with the gradual change type compound eye structure in a large scale, fast and low cost by a template copying method, thereby meeting the requirements of wide myopia patients.
Drawings
FIG. 1 is a schematic view of a substrate after being modified by a femtosecond laser;
FIG. 2 is a schematic front view of a substrate after wet etching;
fig. 3 is a schematic cross-sectional side view of a planar K9 glass substrate after wet etching;
FIG. 4 is a schematic cross-sectional side view of a concave K9 glass substrate after wet etching;
FIG. 5 is a schematic flow chart of the present invention.
In the figure: 1. a substrate; 2. ablating the crater; 3. a central effective light forming region; 4. the periphery is out of focus to form the area.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
A method for preparing a myopia prevention spectacle lens mold with a gradual compound eye structure comprises the following steps:
s1, cleaning a substrate: sequentially adding acetone, alcohol and deionized water into an ultrasonic cleaner to perform ultrasonic bath on the substrate 1 for 5min, wherein the substrate 1 adopts a planar K9 glass substrate, removing impurities on the surface of the substrate 1, and drying for later use;
s2, substrate fixing and ablation preparation: fixing a substrate on a three-dimensional precision workbench, starting a femtosecond laser, and focusing a femtosecond laser beam with initial energy of 3MW to the surface of the substrate 1 through an optical focusing lens with numerical aperture NA of 0.8;
s3, femtosecond laser modification: controlling the movement of a three-dimensional precise workbench through a computer program to enable the focus of a femtosecond laser beam to form ablation craters 2 in an orderly arrangement on the surface of a substrate 1, wherein the distance between two adjacent ablation craters 2 of a first ring is set to be 100 mu m, the distance between two adjacent ablation craters 2 of a second ring is 165 mu m, the distance between the second ring and the first ring is 33 mu m, and the distances between two adjacent ablation points on the two adjacent rings and the same ring are gradually increased in a 65 mu m step by step mode, wherein the pulse width of the femtosecond laser emitted by a femtosecond laser is 50fs, the central wavelength is 800nm, the repetition frequency is 1KHz, so that a central effective light forming area 3 and a peripheral defocusing forming area 4 which are positioned between the center and the periphery are formed on the substrate 1, wherein the unprocessed area of the central area is the central effective light forming area 3 and is a circular area with the diameter of 3 mm, and the peripheral defocusing forming area 4 is formed by surrounding the central effective light forming area by the ablation craters 2 with the intervals sequentially increased from inside to outside 3, 20 rings are arranged in a close and orderly manner;
s4, wet etching: placing the modified substrate 1 in a hydrofluoric acid solution with the concentration of 5%, carrying out ultrasonic bath chemical corrosion at the temperature of 20 ℃, and utilizing selective corrosion of a corrosive liquid to enable the corrosion rate of an ablated crater 2 area and a surrounding modified area to be far greater than that of an unmodified area, wherein after a period of corrosion, the ablated crater 2 area and the surrounding modified area form a peripheral defocusing forming area 4 with a closely-arranged circular structure, and finally a progressive compound eye structure myopia prevention spectacle lens mold with a smooth surface is formed.
S5, cleaning and drying a finished product: and (3) sequentially adding alcohol and deionized water into the formed myopia-preventing spectacle lens mold with the gradual change compound eye structure in an ultrasonic cleaner for ultrasonic bath for 5min, and then placing the lens mold in a vacuum drying oven for drying for later use.
Example 2
A method for preparing a myopia prevention spectacle lens mold with a gradual compound eye structure comprises the following steps:
s1, cleaning a substrate: sequentially adding acetone, alcohol and deionized water into an ultrasonic cleaner to perform ultrasonic bath on the substrate 1 for 10min, wherein the substrate 1 adopts a planar K9 glass substrate, removing impurities on the surface of the substrate 1, and drying for later use;
s2, substrate fixing and ablation preparation: fixing a substrate on a three-dimensional precision workbench, starting a femtosecond laser, and focusing a femtosecond laser beam with initial energy of 3MW to the surface of the substrate 1 through an optical focusing lens with numerical aperture NA of 0.8;
s3, femtosecond laser modification: controlling the movement of a three-dimensional precise workbench through a computer program to enable the focus of a femtosecond laser beam to form ablation craters 2 in an orderly arrangement on the surface of a substrate 1, wherein the distance between two adjacent ablation craters 2 of a first ring is set to be 100 mu m, the distance between two adjacent ablation craters 2 of a second ring is 165 mu m, the distance between the second ring and the first ring is 33 mu m, and the distances between two adjacent ablation points on the two adjacent rings and the same ring are gradually increased in steps of 65 mu m, wherein the pulse width of the femtosecond laser emitted by a femtosecond laser is 50fs, the central wavelength is 800nm, the repetition frequency is 1KHz, so that a central effective light forming area 3 and a peripheral defocus forming area 4 are formed on the substrate 1 and positioned between the center and the periphery, wherein the unprocessed area of the central area is the central effective light forming area 3 and is a circular area with the diameter of 6 mm, and the peripheral defocus forming area 4 is formed by surrounding the central effective light forming area by the ablation craters 2 with the sequentially increased intervals from inside to outside 3, the materials are arranged in a close and orderly way, and specifically, 30 rings are arranged;
s4, wet etching: placing the modified substrate 1 in a hydrofluoric acid solution with the concentration of 8%, carrying out chemical corrosion in an ultrasonic bath at the temperature of 35 ℃, and utilizing selective corrosion of a corrosive solution to enable the corrosion rate of the ablated crater 2 area and the surrounding modified area to be far greater than that of an unmodified area, after a period of corrosion, forming a peripheral defocusing forming area 4 of a closely-arranged regular polygon structure by the ablated crater 2 area and the surrounding modified area, and finally forming the myopia-preventing spectacle lens mold with a gradual change type compound eye structure with a smooth surface.
S5, cleaning and drying a finished product: and sequentially adding alcohol and deionized water into the formed myopia prevention glasses lens mold with the gradual change type compound eye structure in an ultrasonic cleaner for ultrasonic bath for 10min, and then placing the myopia prevention glasses lens mold in a vacuum drying oven for drying for later use.
Example 3
A method for preparing a myopia prevention spectacle lens mold with a gradual change type compound eye structure comprises the following steps:
s1, cleaning a substrate: sequentially adding acetone, alcohol and deionized water into an ultrasonic cleaner to perform ultrasonic bath on the substrate 1 for 15min, wherein the substrate 1 adopts a concave K9 glass substrate, removing impurities on the surface of the substrate 1, and drying for later use;
s2, substrate fixing and ablation preparation: fixing a substrate on a three-dimensional precision workbench, starting a femtosecond laser, and focusing a femtosecond laser beam with initial energy of 3MW to the surface of the substrate 1 through an optical focusing lens with numerical aperture NA of 0.8;
s3, femtosecond laser modification: the movement of a three-dimensional precise workbench is controlled by a computer program to enable a femtosecond laser beam focus to form ablation craters 2 in order arrangement on the surface of a substrate 1, specifically, the distance between two adjacent ablation craters 2 of a first ring is set to be 100 micrometers, the distance between two adjacent ablation craters 2 of a second ring is 165 micrometers, the distance between the second ring and the first ring is 33 micrometers, and the distances between two adjacent ablation points on the two adjacent rings and on the same ring are gradually increased in steps of 65 micrometers, wherein the femtosecond laser emits the femtosecond laser beam with the pulse width of 50fs, the central wavelength of 800nm and the repetition frequency of 1KHz, so that a central effective light forming area 3 and a peripheral defocus forming area 4 which are positioned between the center and the periphery are formed on the substrate 1, wherein the unprocessed area of the central area is the central effective light forming area 3 and is a positive hexagonal defocus forming area with the symmetry axis of 9 mm, and the peripheral ablation forming area 4 is formed by surrounding the central effective light forming area by the femtosecond laser beam 2 with the sequentially increased distance from inside to outside The forming area 3 is formed by closely and orderly arranging 40 rings;
s4, wet etching: placing the modified substrate 1 in 10% hydrofluoric acid solution, carrying out ultrasonic bath chemical corrosion at 50 ℃, and utilizing selective corrosion of corrosive liquid to enable the corrosion rate of the ablated crater 2 area and the surrounding modified area to be far greater than that of the unmodified area, after a period of corrosion, forming a peripheral defocusing forming area 4 of a tightly-arranged regular polygon structure by the ablated crater 2 area and the surrounding modified area, and finally forming the myopia-preventing spectacle lens mold with a gradual change type compound eye structure with a smooth surface.
S5, cleaning and drying a finished product: and (3) sequentially adding alcohol and deionized water into the formed myopia-preventing spectacle lens mold with the gradual change compound eye structure in an ultrasonic cleaner for ultrasonic bath for 15min, and then placing the lens mold in a vacuum drying oven for drying for later use.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A method for preparing a myopia prevention spectacle lens mold with a gradual compound eye structure is characterized by comprising the following steps:
s1, cleaning a substrate: carrying out ultrasonic bath on the substrate by an ultrasonic cleaner, removing impurities on the surface of the substrate, and drying for later use;
s2, substrate fixing and ablation preparation: fixing a substrate on a three-dimensional precision workbench, starting a femtosecond laser, and focusing a femtosecond laser beam on the surface of the substrate through an optical focusing lens;
s3, femtosecond laser modification: controlling the movement of a three-dimensional precise workbench through a computer program to enable a femtosecond laser beam focus to form orderly-arranged ablation craters on the surface of a substrate, wherein the distance between two adjacent ablation craters of a first ring at the inner side is 100 micrometers, the distance between two adjacent ablation craters of a second ring is 165 micrometers, the distance between the second ring and the first ring is 33 micrometers, and the distances between two adjacent ablation points on the two adjacent rings and the same ring are gradually increased by 65 micrometers, so that a central effective light forming area and a peripheral defocusing forming area which are positioned between the center and the periphery of the substrate are formed on the substrate, wherein the unprocessed area of the central area is a central effective light forming area, and the peripheral defocusing forming area is formed by gradually arranging the ablation craters around the central effective light forming area;
s4, wet etching: placing the modified substrate in a corrosive liquid, carrying out ultrasonic bath chemical corrosion, and utilizing selective corrosion of the corrosive liquid to enable the corrosion rate of the ablated crater area and the surrounding modified area to be far greater than that of the unmodified area, after a period of corrosion, forming a peripheral defocusing forming area of a closely-arranged circular or regular polygonal structure by the ablated crater area and the surrounding modified area, and finally forming the myopia prevention spectacle lens mold with a gradual change type compound eye structure with a smooth surface.
2. The method for preparing a mold for a myopia prevention spectacle lens with a gradual change type compound eye structure according to claim 1, wherein the method comprises the following steps: and S1, sequentially adding acetone, alcohol and deionized water into the ultrasonic cleaner to perform ultrasonic bath on the substrate, wherein the cleaning time is 5-15 min.
3. The method for preparing a mold for a myopia prevention spectacle lens with a gradual change type compound eye structure according to claim 1, wherein the method comprises the following steps: the initial energy of the femtosecond laser beam emitted by the femtosecond laser device and focused on the surface of the substrate in the step S2 is 3 MW.
4. The method for preparing a mold for a myopia prevention spectacle lens with a gradual change type compound eye structure according to claim 1, wherein the method comprises the following steps: in S2, the numerical aperture NA of the optical focusing lens is 0.8.
5. The method for preparing a mold for a myopia prevention spectacle lens with a gradual change type compound eye structure according to claim 1, wherein the method comprises the following steps: in S3, the femtosecond laser emits femtosecond laser beam with pulse width of 50fs, center wavelength of 800nm, and repetition frequency of 1 KHz.
6. The method for preparing a mold for a myopia prevention spectacle lens with a gradual change type compound eye structure according to claim 1, wherein the method comprises the following steps: the central effective light forming region in S3 is a circular region having a central diameter of the substrate of 3 to 9 mm or a regular polygon region having a symmetry axis of 3 to 9 mm.
7. The method for preparing a mold for a myopia prevention spectacle lens with a gradual change type compound eye structure according to claim 1, wherein the method comprises the following steps: and in the S3, the ablation craters on the substrate surround the central effective light forming area, and 20-40 rings are arranged around the central effective light forming area in a circular or regular polygon mode.
8. The method for preparing a mold for a myopia prevention spectacle lens with a gradual change type compound eye structure according to claim 1, wherein the method comprises the following steps: and the corrosive liquid in the S4 is hydrofluoric acid solution with the concentration of 5-10%.
9. The method for preparing a mold for a myopia prevention spectacle lens with a gradual change type compound eye structure according to claim 1, wherein the method comprises the following steps: and the corrosion temperature of the acid solution in the S4 is 20-50 ℃ when the ultrasonic bath chemical corrosion is carried out.
10. The method for preparing a mold for a myopia prevention spectacle lens with a gradual change type compound eye structure according to claim 1, wherein the method comprises the following steps: and further comprising cleaning and drying finished products: and (4) sequentially adding alcohol and deionized water into the myopia-preventing spectacle lens mold with the gradual compound eye structure formed in the step S4 in an ultrasonic cleaner for ultrasonic bath for 5-15 min, and then placing the myopia-preventing spectacle lens mold in a vacuum drying oven for drying.
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| JP2005250446A (en) * | 2004-02-06 | 2005-09-15 | Victor Co Of Japan Ltd | Micro lens array and method of manufacturing replication mold for the same |
| US10252460B1 (en) * | 2014-09-15 | 2019-04-09 | Lockheed Martin Corporation | Method of forming an optical element using an additive manufactured component, and related devices, components, and systems |
| EP3722070A1 (en) * | 2017-12-05 | 2020-10-14 | Furukawa Electric Co., Ltd. | Functional member and method for manufacturing same |
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