CN115945797A - Microchannel and lens array type myopia prevention glasses - Google Patents

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

Micro-channel and lens array anti-myopia glasses

technical field

The invention relates to the technical field of microprocessing of optical devices, in particular to microchannel and lens array anti-myopia glasses.

Background technique

In recent years, myopia has become an important threat to visual health. The prevalence of myopia has risen sharply, and there is a trend of younger age. Once myopia occurs, it is irreversible, and with the aggravation of myopia, the risk of myopic complications increases, which will seriously affect visual health. It has been proven that the use of peripheral defocus can effectively slow down the further development of myopia. This type of anti-myopia lens has a defocused area formed by microlens arrays integrated with microchannels. In this lens, light rays pass through different refractive 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 a predetermined position, thereby inhibiting the development of myopia, where the microchannels are in This plays the role of the aperture.

Therefore, the present invention aims to prepare anti-myopia glasses with microlens arrays combined with microchannels, so as to be used in the treatment of myopia, thereby inhibiting the development of myopia.

Contents of the invention

In view of the above existing problems, the present invention aims to provide micro-channel and lens array anti-myopia glasses, which integrate micro-lens arrays and micro-channel structures on the substrate through femtosecond laser technology and can meet the needs of different patients for myopia prevention. For myopia glasses, the out-of-focus area composed of microlens arrays is prepared on the anti-myopia glasses, and then the microlenses and microchannels are coupled together, which can effectively alleviate the further development of myopia.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows: micro-channel and lens array anti-myopia glasses, it is characterized in that, the manufacture method of described anti-myopia glasses comprises the following steps:

1) Substrate cleaning: The substrate is K9 glass with a plano-convex surface, and the substrate is cleaned with acetone, alcohol and deionized water in an ultrasonic water bath for 5 minutes to remove impurities on the surface of the substrate and dried for later use;

2) Microlens array forming: the substrate is fixed on the three-dimensional translation platform of the femtosecond exciter, the femtosecond laser beam with an energy of 3mW is focused on the surface of the substrate through an optical focusing lens with NA=0.5, and the three-dimensional translation is controlled by a computer program The movement of the stage enables the femtosecond laser to prepare a spherical microlens array on the upper surface of the substrate;

3) Microchannel forming: focus the femtosecond laser focus point directly under the spherical microlens array to process the microchannel;

4) Wet etching process: place the femtosecond laser-treated substrate in a hydrofluoric acid solution, and perform chemical etching in an ultrasonic water bath. After 60-80 minutes of etching, microlenses and microchannels with smooth surfaces are formed;

5) Ultrasonic bath washing: use acetone, alcohol and deionized water in an ultrasonic water bath to wash away residues on the surface of the substrate, and finally obtain a clean spectacle lens with a single-sided microlens.

Preferably, the central wavelength of the femtosecond laser used is 800 nm, the pulse width is 50 fs, and the repetition frequency is 1 KHz.

Preferably, the radius of the spherical microlens array is 300um, the microchannel is located 500um directly below the spherical microlens array, the radius of the microchannel is 50um, and the depth is 300um.

Preferably, the spherical microlens array and the microchannels are all vertically corresponding and arranged in a circular manner, the distance between two adjacent rings is 600um, and the distance between two adjacent ablation points between the same rings It is 600um, and there are two rings arranged in total. The size of the microlens array is guaranteed to be within the range of 100 microns, the size of the microchannel is not larger than the diameter of the lens, and the distance between the two is guaranteed to be within the depth of field of the microlens to meet the effect of clear imaging. If it exceeds the depth of field, there will be no imaging problem.

Preferably, the concentration of the hydrofluoric acid solution is 5%-10%, and the corrosion temperature is 20-50°C. Under this corrosion condition, microlenses with good morphology can be obtained. Different concentrations of hydrofluoric acid have different etching rates on the modified area. The surface quality of the sample corroded when the temperature is higher than 50 ° C is poor, and the temperature is lower than 20 ° C. Then there is a slow corrosion rate, and this temperature range can well control the corrosion rate and the surface quality after corrosion.

The beneficial effects of the present invention are: the femtosecond laser can perform subtractive manufacturing on any material by virtue of its ultra-high peak power, and has a processing accuracy exceeding the diffraction limit. By adopting point-by-point scanning, it can prepare millimeter-scale or even larger lasers. In addition to microlenses, it is also possible to prepare microlens arrays of micron size and arbitrary shape, and process a microchannel structure with high coaxiality on the lower surface of the substrate corresponding to the microlens array vertically, and then through wet etching technology , making the shape of the microlens array smooth, forming the anti-myopia glasses integrated with the microlens array and the microchannel, which can meet the myopia needs of different patients.

The out-of-focus area formed by the microlens array is prepared on the anti-myopia glasses, and then the microlens and the microchannel are coupled together, which can effectively alleviate the further development of myopia. In this type of lens, light rays pass through different refractive regions, and after passing through micro-channels, it is more conducive to focus the image on the retina of the eye, so that the light rays incident on the spectacle lens are at a position closer to the object than the predetermined position The micro-channel will eliminate the influence of stray light, thereby inhibiting the development of myopia and meeting the different needs of different patients for glasses.

Due to the difference of the lens material, the refractive index is different, and the microlens made on one side of the low refractive index lens sometimes cannot reach the preset focal length, but through the method of the present invention, the microlens can be processed on both sides of the lens, Then the focal length can be adjusted in a larger range, so as to meet the preset requirements.

Description of drawings

Fig. 1 is a side view of the base material of myopia glasses of the present invention.

Fig. 2 is a plan view of the base material of the myopia glasses of the present invention.

Fig. 3 is a side view of a single microlens integrated with a single microchannel processed by a femtosecond laser according to the present invention.

Fig. 4 is a top view of a single microlens integrated with a single microchannel processed by a femtosecond laser according to the present invention.

Fig. 5 is a side view of a plurality of microlens integrated microchannels processed by a femtosecond laser according to the present invention.

Fig. 6 is a top view of multiple microlens integrated microchannels processed by femtosecond laser according to the present invention.

Among them: 1-substrate; 2-single ablation point of microlens array; 3-single microchannel ablation point.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiment one

Micro-channel and lens array anti-myopia glasses, the manufacturing method of which comprises the following steps:

1) Substrate cleaning: The substrate is preferably K9 glass with a plano-convex surface. Use acetone, alcohol, and deionized water in an ultrasonic water bath to clean the substrate for 5 minutes in order to remove impurities on the surface of the substrate, and dry it for later use.

2) Microlens array forming: fix the base material on the three-dimensional translation stage of the femtosecond exciter, adjust the femtosecond laser beam with a center wavelength of 800nm, a pulse width of 50fs, a repetition frequency of 1KHz, and an energy of 3mW to pass through The optical focusing lens with NA=0.5 is focused on the surface of the substrate, and the movement of the three-dimensional translation stage is controlled by a computer program, so that the femtosecond laser prepares a circle with a radius of 300um and between two adjacent ablation points on the upper surface of the substrate. A spherical microlens array with a distance of 600um, a distance between two adjacent rings of 600um and a total of two rings. Preferably, a rectangular or hexagonal microlens array can also be processed as required.

3) Microchannel forming: Focus the femtosecond laser focus point at 500um directly below the spherical microlens array to process a microchannel. The radius of the microchannel is 50um and the depth is 300um. Vertical one-to-one correspondence.

4) Wet etching process: place the femtosecond laser-treated substrate in a hydrofluoric acid solution with a concentration of 5% and an etching temperature of 50°C, and perform chemical etching in an ultrasonic water bath. After 80 minutes of etching, the surface is formed Smooth microlenses and microchannels.

5) Ultrasonic bath washing: wash away the residue on the surface of the substrate, and finally obtain a clean spectacle lens with a single-sided microlens.

Embodiment two

Micro-channel and lens array anti-myopia glasses, the manufacturing method of which comprises the following steps:

1) Substrate cleaning: Use acetone, alcohol and deionized water in an ultrasonic water bath to clean the substrate for 5 minutes, remove impurities on the surface of the substrate, and dry for later use.

2) Microlens array forming: fix the base material on the three-dimensional translation stage of the femtosecond exciter, adjust the femtosecond laser beam with a center wavelength of 800nm, a pulse width of 50fs, a repetition frequency of 1KHz, and an energy of 3mW to pass through The optical focusing lens with NA=0.5 is focused on the surface of the substrate, and the movement of the three-dimensional translation stage is controlled by a computer program, so that the femtosecond laser prepares a circle with a radius of 300um and between two adjacent ablation points on the upper surface of the substrate. A spherical microlens array with a distance of 600um, a distance between two adjacent rings of 600um and a total of two rings.

3) Microchannel forming: Focus the femtosecond laser focus point at 500um directly below the spherical microlens array to process a microchannel. The radius of the microchannel is 50um and the depth is 300um. Vertical one-to-one correspondence.

4) Wet etching process: place the femtosecond laser-treated substrate in a hydrofluoric acid solution with a concentration of 7% and an etching temperature of 35°C for chemical etching in an ultrasonic water bath. After 60 minutes of etching, the surface is formed Smooth microlenses and microchannels.

5) Ultrasonic bath washing: wash away the residue on the surface of the substrate, and finally obtain a clean spectacle lens with a single-sided microlens.

Embodiment three

Micro-channel and lens array anti-myopia glasses, the manufacturing method of which comprises the following steps:

1) Substrate cleaning: Use acetone, alcohol and deionized water in an ultrasonic water bath to clean the substrate for 5 minutes, remove impurities on the surface of the substrate, and dry for later use.

2) Microlens array forming: fix the base material on the three-dimensional translation stage of the femtosecond exciter, adjust the femtosecond laser beam with a center wavelength of 800nm, a pulse width of 50fs, a repetition frequency of 1KHz, and an energy of 3mW to pass through The optical focusing lens with NA=0.5 is focused on the surface of the substrate, and the movement of the three-dimensional translation stage is controlled by a computer program, so that the femtosecond laser prepares a circle with a radius of 300um and between two adjacent ablation points on the upper surface of the substrate. A spherical microlens array with a distance of 600um, a distance between two adjacent rings of 600um and a total of two rings.

3) Microchannel forming: Focus the femtosecond laser focus point at 500um directly below the spherical microlens array to process a microchannel. The radius of the microchannel is 50um and the depth is 300um. Vertical one-to-one correspondence.

4) Wet etching process: place the femtosecond laser-treated substrate in a hydrofluoric acid solution with a concentration of 10% and an etching temperature of 20°C, and perform chemical etching in an ultrasonic water bath. After 70 minutes of etching, the surface is formed Smooth microlenses and microchannels.

5) Ultrasonic bath washing: wash away the residue on the surface of the substrate, and finally obtain a clean spectacle lens with a single-sided microlens.

The principle of the present invention is: form anti-myopia glasses integrated with microlens array and microchannel structure on the base material by femtosecond laser technology and can meet the myopia needs of different patients, and prepare off-the-shelf glasses composed of microlens arrays on the anti-myopia glasses The focal area, and then coupling the microlenses and microchannels together, can effectively alleviate the further development of myopia.

The annular microlens distributed on the lens has the effect of peripheral defocusing, focusing the image on the retina of the eye so that the light incident on the spectacle lens is focused at a position closer to the object than the predetermined position, thereby inhibiting the development of myopia. The channel acts as a stop here to reduce the influence of stray light.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. microchannel and lens array type anti-myopia glasses, it is characterized in that, the manufacture method of described anti-myopia glasses comprises the following steps: 1) Substrate cleaning: The substrate is K9 glass with a plano-convex surface, and the substrate is cleaned with acetone, alcohol and deionized water in an ultrasonic water bath for 5 minutes to remove impurities on the surface of the substrate and dried for later use; 2) Microlens array forming: the substrate is fixed on the three-dimensional translation platform of the femtosecond exciter, the femtosecond laser beam with an energy of 3mW is focused on the surface of the substrate through an optical focusing lens with NA=0.5, and the three-dimensional translation is controlled by a computer program The movement of the stage enables the femtosecond laser to prepare a spherical microlens array on the upper surface of the substrate; 3) Microchannel forming: focus the femtosecond laser focus point directly under the spherical microlens array to process the microchannel; 4) Wet etching process: place the femtosecond laser-treated substrate in a hydrofluoric acid solution, and perform chemical etching in an ultrasonic water bath. After 60-80 minutes of etching, microlenses and microchannels with smooth surfaces are formed; 5) Ultrasonic bath washing: use acetone, alcohol and deionized water in an ultrasonic water bath to wash away residues on the surface of the substrate, and finally obtain a clean spectacle lens with a single-sided microlens. 2. The microchannel and lens array anti-myopia glasses according to claim 1, characterized in that: the central wavelength of the femtosecond laser used is 800nm, the pulse width is 50fs, and the repetition frequency is 1KHz. 3. microchannel and lens array type anti-myopia glasses according to claim 2, is characterized in that: the radius of described spherical microlens array is 300um, and described microchannel is positioned at the 500um place directly below spherical microlens array, and microchannel The radius is 50um and the depth is 300um. 4. The microchannel and lens array type anti-myopia glasses according to claim 3, characterized in that: the spherical microlens array and the microchannel are all vertically corresponding and arranged in a circular manner, between adjacent two rings The distance between them is 600um, the distance between two adjacent ablation points in the same ring is 600um, and there are two rings in total. 5. The anti-myopia glasses of micro-channel and lens array according to claim 4, characterized in that: the concentration of the hydrofluoric acid solution is 5%-10%, and the corrosion temperature is 20-50°C.

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