CN115945797A - Microchannel and lens array type myopia prevention glasses - Google Patents
Microchannel and lens array type myopia prevention glasses Download PDFInfo
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- CN115945797A CN115945797A CN202211258699.2A CN202211258699A CN115945797A CN 115945797 A CN115945797 A CN 115945797A CN 202211258699 A CN202211258699 A CN 202211258699A CN 115945797 A CN115945797 A CN 115945797A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a micro-channel and lens array type myopia prevention glasses, and the manufacturing method comprises the steps of substrate cleaning, micro-lens array forming, micro-channel forming, wet etching process and ultrasonic bath washing. The method adopts the femtosecond laser technology to prepare the micro-lens array with micron grade and any shape on the surface of the base material, and vertically and correspondingly processes the micro-channel structure with high coaxiality on the lower surface of the base material and the micro-lens array, thereby being capable of meeting the myopia prevention glasses of different patients. The micro-lens is composed of a defocusing area formed by a micro-lens array, then the micro-lens and the micro-channel are coupled together, light rays pass through different refraction areas, after passing through the micro-channel, the micro-channel is more favorable for focusing an image on the retina of an eye, so that the light rays incident to the glasses lens are focused at a position closer to an object than a preset position, the micro-channel can eliminate the influence of stray light, the development of myopia is inhibited, and different requirements of different patients on glasses are met.
Description
Technical Field
The invention relates to the technical field of micromachining of optical devices, in particular to a micro-channel and lens array type myopia-preventing glasses.
Background
In recent years, myopia has become a significant threat to visual health. The prevalence of myopia increases sharply and tends to be low. 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 demonstrated that the use of peripheral defocus is effective in slowing the progression of myopia. The anti-myopia lens of the type is provided with an out-of-focus area formed by micro-lens array integrated micro-channels. In this lens, light rays pass through different dioptric regions, focusing the image on the retina of the eye so that the light rays incident on the spectacle lens are focused at a position closer to the object than the predetermined position, thereby inhibiting the development of myopia, in which the micro-channels act as diaphragms.
Therefore, the invention aims to prepare the myopia prevention glasses with the micro lens array combined with the micro channels, so as to be applied to treating myopia and further inhibit the development of the myopia.
Disclosure of Invention
In view of the above problems, the present invention is directed to provide a micro-channel and lens array type myopia prevention glasses, which is a pair of myopia prevention glasses that integrates a micro-lens array and a micro-channel structure and can meet the myopia needs of different patients by a femtosecond laser technology, and the further development of myopia can be effectively alleviated by preparing an out-of-focus area formed by the micro-lens array on the myopia prevention glasses and then coupling the micro-lens and the micro-channel together.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the micro-channel and lens array type myopia prevention glasses are characterized in that the manufacturing method of the myopia prevention glasses comprises the following steps:
1) Cleaning a base material: selecting K9 glass with a plano-convex curved surface as a base material, sequentially cleaning the base material for 5min by using acetone, alcohol and deionized water in an ultrasonic water bath, removing impurities on the surface of the base material, and drying for later use;
2) Forming a micro lens array: fixing a substrate on a three-dimensional translation stage of a femtosecond laser, focusing a femtosecond laser beam with the energy of 3mW on the surface of the substrate through an optical focusing lens with NA =0.5, and controlling the movement of the three-dimensional translation stage through a computer program to enable the femtosecond laser to prepare a molded spherical micro-lens array on the upper surface of the substrate;
3) Forming a micro-channel: focusing a femtosecond laser focus point under a spherical micro lens array to process a micro channel;
4) And (3) wet etching process: placing the substrate processed by the femtosecond laser in a hydrofluoric acid solution, carrying out ultrasonic water bath chemical corrosion, and forming a micro lens and a micro channel with smooth surfaces after 60-80min of corrosion;
5) Ultrasonic bath washing: and sequentially washing the residues on the surface of the base material by using acetone, alcohol and deionized water in an ultrasonic water bath to finally obtain the clean spectacle lens with the single-sided micro lens.
Preferably, the femtosecond laser has a center wavelength of 800nm, a pulse width of 50fs, and a repetition frequency of 1KHz.
Preferably, the radius of spherical microlens array is 300um, the microchannel is located 500um department under the spherical microlens array, and the radius of microchannel is 50um, the degree of depth is 300um.
Preferably, the spherical microlens array and the micro channel are vertically corresponding and are arranged in an annular mode, the distance between two adjacent rings is 600um, the distance between two adjacent ablation points between the same ring is 600um, and two rings are arranged totally. The size of the micro lens array is guaranteed to be within a hundred-micron range, the size of the micro channel is not larger than the diameter of the lens, the distance between the micro channel and the lens is guaranteed to be within the range of the depth of field of the micro lens, the clear imaging effect is achieved, and the problem that imaging cannot be achieved when the depth of field is exceeded exists.
Preferably, the concentration of the hydrofluoric acid solution is 5% -10%, and the corrosion temperature is 20-50 ℃. The micro lens with good appearance can be obtained under the corrosion condition, the hydrofluoric acid with different concentrations has different etching rates on the modified area, the surface quality of a sample corroded at the temperature higher than 50 ℃ is poor, the corrosion speed is slow when the temperature is lower than 20 ℃, and the corrosion speed and the surface quality after corrosion can be well controlled within the temperature range.
The beneficial effects of the invention are: femtosecond laser can reduce any material by virtue of ultrahigh peak power thereof, and has processing precision exceeding diffraction limit, except for preparing millimeter-sized or even larger micro-lens by adopting a point-by-point scanning mode, micro-lens array with micron-sized and any appearance can be prepared, and a micro-channel structure with high coaxiality is processed on the lower surface of a substrate in vertical correspondence with the micro-lens array, and then through wet etching technology, the appearance of the micro-lens array becomes smooth, and the myopia prevention glasses integrated with the micro-lens array and micro-channel can meet the myopia requirements of different patients are formed.
The further development of myopia can be effectively relieved by preparing the defocusing area formed by the micro-lens array on the myopia-preventing glasses and then coupling the micro-lenses and the micro-channels together. In this type of lens, the light rays pass through the different dioptric zones, and after passing through the microchannels, it is more advantageous to focus the image on the retina of the eye, so that the light rays incident on the spectacle lens are focused at a position closer to the object than the predetermined position, wherein the microchannels eliminate the effect of stray light, thus inhibiting the development of myopia, achieving the satisfaction of different needs of different patients on the spectacles.
Because of the difference of the lens materials and the refractive indexes, the micro lens manufactured on the single surface of the lens with low refractive index can not reach the preset focal length sometimes, and by the method, the micro lens can be processed on the double surfaces of the lens, so that the focal length can be adjusted in a larger range, thereby reaching the preset requirement.
Drawings
FIG. 1 is a side view of a myopic lens substrate of the present invention.
FIG. 2 is a top view of a myopic lens substrate of the present invention.
Figure 3 is a side view of a femtosecond laser processed single microlens integrated single microchannel of the present invention.
FIG. 4 is a top view of a femtosecond laser processed single microlens integrated single microchannel according to the present invention.
Figure 5 is a side view of a femtosecond laser process for fabricating a plurality of microlens-integrated microchannels in accordance with the present invention.
FIG. 6 is a top view of a femtosecond laser process for processing a plurality of microlens integrated micro-channels according to the present invention.
Wherein: 1-a substrate; 2-single ablation spot of microlens array; 3-Single microchannel ablation Point.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description will be made with reference to the accompanying drawings and embodiments.
Example one
The manufacturing method of the micro-channel and lens array type myopia-preventing glasses comprises the following steps:
1) Cleaning a base material: the substrate is preferably K9 glass with a plano-convex curved surface, the substrate is sequentially cleaned by acetone, alcohol and deionized water in an ultrasonic water bath for 5min, impurities on the surface of the substrate are removed, and the substrate is dried for later use.
2) Forming a micro lens array: the method comprises the steps of fixing a base material on a three-dimensional translation table of a femtosecond laser, adjusting the central wavelength of the femtosecond laser to be 800nm, the pulse width of the femtosecond laser to be 50fs, the repetition frequency of the femtosecond laser to be 1KHz, focusing the femtosecond laser beam with the energy of 3mW on the surface of the base material through an optical focusing lens with NA =0.5, and controlling the movement of the three-dimensional translation table through a computer program to enable the femtosecond laser to prepare a spherical micro-lens array with the radius of 300um, the distance between two adjacent ablation points of 600um, the distance between two adjacent rings of 600um and two rings in total on the upper surface of the base material along an annular shape. Preferably, a rectangular or hexagonal microlens array can be processed according to the requirement.
3) Forming a micro-channel: the femtosecond laser focus point is focused at 500um under the spherical micro lens array to process a micro channel, the radius of the micro channel is 50um, the depth of the micro channel is 300um, and the micro channel is vertically in one-to-one correspondence with each ablation point of the spherical micro lens array.
4) And (3) wet etching process: placing the substrate treated by the femtosecond laser in a hydrofluoric acid solution with the concentration of 5% and the corrosion temperature of 50 ℃, carrying out ultrasonic water bath chemical corrosion, and forming a micro lens and a micro channel with smooth surfaces after 80min of corrosion.
5) Ultrasonic bath washing: and washing to remove the residue on the surface of the base material, and finally obtaining the clean spectacle lens with the single-sided micro lens.
Example two
The manufacturing method of the micro-channel and lens array type myopia prevention glasses comprises the following steps:
1) Cleaning a base material: and cleaning the base material for 5min by sequentially using acetone, alcohol and deionized water in an ultrasonic water bath, removing impurities on the surface of the base material, and drying for later use.
2) Forming a micro lens array: the method comprises the steps of fixing a base material on a three-dimensional translation table of a femtosecond laser, adjusting the central wavelength of the femtosecond laser to be 800nm, the pulse width of the femtosecond laser to be 50fs, the repetition frequency of the femtosecond laser to be 1KHz, focusing the femtosecond laser beam with the energy of 3mW on the surface of the base material through an optical focusing lens with NA =0.5, and controlling the movement of the three-dimensional translation table through a computer program to enable the femtosecond laser to prepare a spherical micro-lens array with the radius of 300um, the distance between two adjacent ablation points of 600um, the distance between two adjacent rings of 600um and two rings in total on the upper surface of the base material along an annular shape.
3) Forming a micro-channel: the femtosecond laser focus point is focused at 500um under the spherical micro lens array to process a micro channel, the radius of the micro channel is 50um, the depth of the micro channel is 300um, and the micro channel is vertically in one-to-one correspondence with each ablation point of the spherical micro lens array.
4) And (3) wet etching process: placing the substrate treated by the femtosecond laser in a hydrofluoric acid solution with the concentration of 7% and the corrosion temperature of 35 ℃, carrying out ultrasonic water bath chemical corrosion, and forming a micro lens and a micro channel with smooth surfaces after 60min of corrosion.
5) Ultrasonic bath washing: and washing to remove the residue on the surface of the base material, and finally obtaining the clean spectacle lens with the single-sided micro lens.
EXAMPLE III
The manufacturing method of the micro-channel and lens array type myopia prevention glasses comprises the following steps:
1) Cleaning a base material: and cleaning the base material for 5min by sequentially using acetone, alcohol and deionized water in an ultrasonic water bath, removing impurities on the surface of the base material, and drying for later use.
2) Forming a micro lens array: the method comprises the steps of fixing a base material on a three-dimensional translation table of a femtosecond laser, adjusting the central wavelength of the femtosecond laser to be 800nm, the pulse width of the femtosecond laser to be 50fs, the repetition frequency of the femtosecond laser to be 1KHz, focusing the femtosecond laser beam with the energy of 3mW on the surface of the base material through an optical focusing lens with NA =0.5, and controlling the movement of the three-dimensional translation table through a computer program to enable the femtosecond laser to prepare a spherical micro-lens array with the radius of 300um, the distance between two adjacent ablation points of 600um, the distance between two adjacent rings of 600um and two rings in total on the upper surface of the base material along an annular shape.
3) Forming a micro-channel: focusing femtosecond laser focus points on 500um positions right below the spherical micro-lens array to process micro-channels, wherein the radius of each micro-channel is 50um, the depth of each micro-channel is 300um, and the micro-channels are vertically in one-to-one correspondence with each ablation point of the spherical micro-lens array.
4) And (3) wet etching process: placing the substrate treated by the femtosecond laser in a hydrofluoric acid solution with the concentration of 10% and the corrosion temperature of 20 ℃, carrying out ultrasonic water bath chemical corrosion, and forming a micro lens and a micro channel with smooth surfaces after 70min of corrosion.
5) Ultrasonic bath washing: and washing off the residues on the surface of the base material to finally obtain the clean spectacle lens with the single-sided micro lens.
The principle of the invention is as follows: the integrated microlens array and microchannel structure of shaping on the substrate through femto second laser technique and can satisfy the myopia prevention glasses of different patient's near-sighted demands, prepare the out of focus region that constitutes by the microlens array on the myopia prevention glasses, then couple together microlens and microchannel, can alleviate myopic further development effectively.
The annular microlenses distributed over the lenses act as peripheral defocus to focus the image on the retina of the eye so that light incident on the spectacle lens is focused at a location closer to the object than the predetermined location, thereby inhibiting the development of myopia, with the microchannels therein acting as diaphragms to reduce the effects of stray light.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The micro-channel and lens array type myopia prevention glasses are characterized in that the manufacturing method of the myopia prevention glasses comprises the following steps:
1) Cleaning a base material: selecting K9 glass with a plano-convex curved surface as a base material, sequentially cleaning the base material for 5min by using acetone, alcohol and deionized water in an ultrasonic water bath, removing impurities on the surface of the base material, and drying for later use;
2) Forming a micro lens array: fixing a base material on a three-dimensional translation table of a femtosecond laser, focusing a femtosecond laser beam with the energy of 3mW on the surface of the base material through an optical focusing lens with NA =0.5, and controlling the movement of the three-dimensional translation table through a computer program to enable the femtosecond laser to prepare a molded spherical micro-lens array on the upper surface of the base material;
3) Forming a micro-channel: focusing a femtosecond laser focus point under a spherical micro lens array to process a micro channel;
4) And (3) wet etching process: placing the substrate processed by the femtosecond laser in a hydrofluoric acid solution, carrying out ultrasonic water bath chemical corrosion, and forming a micro lens and a micro channel with smooth surfaces after 60-80min of corrosion;
5) Ultrasonic bath washing: and sequentially washing the residues on the surface of the base material by using acetone, alcohol and deionized water in an ultrasonic water bath to obtain the clean spectacle lens with the single-sided micro lens.
2. The micro-channel and lens array type myopia prevention glasses of claim 1, wherein: the femtosecond laser has a center wavelength of 800nm, a pulse width of 50fs, and a repetition frequency of 1KHz.
3. The micro-channel and lens array type myopia prevention glasses of claim 2, wherein: spherical microlens array's radius is 300um, the microchannel is located 500um departments under the spherical microlens array, and the radius of microchannel is 50um, the degree of depth is 300um.
4. The micro-channel and lens array type myopia prevention glasses of claim 3, wherein: the spherical micro-lens array and the micro-channel are vertically corresponding and are arranged in an annular mode, the distance between every two adjacent rings is 600um, the distance between every two adjacent ablation points between the same rings is 600um, and two rings are arranged totally.
5. The micro-channel and lens array type myopia prevention glasses of claim 4, wherein: the concentration of the hydrofluoric acid solution is 5% -10%, and the corrosion temperature is 20-50 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211258699.2A CN115945797A (en) | 2022-10-14 | 2022-10-14 | Microchannel and lens array type myopia prevention glasses |
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| CN202211258699.2A CN115945797A (en) | 2022-10-14 | 2022-10-14 | Microchannel and lens array type myopia prevention glasses |
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| CN115945797A true CN115945797A (en) | 2023-04-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117139874A (en) * | 2023-08-17 | 2023-12-01 | 北方夜视技术股份有限公司 | Method for processing micropore array and manufacturing microchannel plate based on pulse femtosecond laser |
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2022
- 2022-10-14 CN CN202211258699.2A patent/CN115945797A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117139874A (en) * | 2023-08-17 | 2023-12-01 | 北方夜视技术股份有限公司 | Method for processing micropore array and manufacturing microchannel plate based on pulse femtosecond laser |
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