Optical filter, eye protection device, preparation method of optical filter and application thereof

Abstract

The present invention relates to a filter, an eye protection device, a preparation method of the filter, and an application. The filter includes a substrate, on which a coating layer is provided to allow light with a wavelength of 671nm to 690nm to pass through, and can reduce or prevent other light from passing through. The present invention provides an eye protection device, including a support component, which has a filter provided at the position where light passes through. The present invention also provides a method for preparing the filter, comprising: placing the blanked and cleaned substrate into a coating machine for preheating; placing silicon dioxide and titanium dioxide into the coating machine, and allowing them to sublime and collide and crystallize on the surface of the substrate to form a coating layer. The present invention also provides an application of a filter, which can improve the activity of catalase in the mitochondria of retinal cells. The present invention can quickly enhance the activity of retinal cells in a short period of time, delay aging, save eyesight, significantly improve the problem of aging of visual cells on the retina of the human eye, play a health-care role, and achieve the purpose of treating retinal aging in people over 40 years old.

Description

Technical Field

[0001] The present invention relates to the field of optical application technology, and in particular to an optical filter, an eye protection device, a preparation method of the optical filter, and applications. Background Art

[0002] Photoreceptors are divided into cones and rods. The human retina contains approximately 6 to 8 million cones and 120 million rods, distributed in different parts of the retina. Only cones, not rods, are found in the fovea. Rods begin to appear at the edge of the fovea, and the number of rods gradually increases and the number of cones decreases as you move outward. Photoreceptors contain photosensitive substances. When stimulated by light, a series of photochemical changes and electrical potential changes occur, causing the photoreceptors to fire nerve impulses. These impulses are transmitted to bipolar cells via the end feet of the photoreceptors (cones or rods).

[0003] Studies have shown that when people reach a certain age, especially after 40, their cones and rods begin to age. The main symptoms are vision loss and color vision abnormalities. When rods are damaged, night blindness can also occur. The latest research shows that irradiating the human eye with red light of a wavelength of 671nm to 690nm can effectively improve retinal aging. Summary of the Invention

[0004] The purpose of the present invention is to provide a filter, an eye protection device, a preparation method of the filter and its application, so as to improve the problem of aging of cones and rods on the human retina.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A filter comprises a transparent substrate, at least one surface of which is provided with a coating layer;

[0007] The substrate provided with the coating layer allows red light with a wavelength of 671nm to 690nm to pass through, and can reduce or prevent light of other wavelengths from passing through.

[0008] Preferably, the coating layer is formed by alternating crystallization of titanium dioxide and silicon dioxide.

[0009] Preferably, the thickness of the coating layer is 7-8 μm.

[0010] Preferably, the substrate provided with the coating layer has a transmittance greater than 80% for red light with a wavelength of 671 nm to 690 nm, and a transmittance of ≦0.01% for light of other wavelengths.

[0011] Preferably, the substrate is optical glass, the thickness of the optical glass is 0.3 mm to 6.2 mm, and the shape of the optical glass includes but is not limited to round, oval or square.

[0012] The present invention also provides an eye protection device, comprising a supporting component, wherein the supporting component is equipped with a filter as described in the present invention at a position for light to pass through. When a user wears or uses the device, red light with a wavelength of 671nm to 690nm can pass through the filter and enter the retinal cells of the human eye, while reducing or preventing light of other wavelengths from passing through the filter.

[0013] Preferably, the supporting component includes but is not limited to a glasses frame, an eye mask frame, a face mask frame, a lampshade or a lens barrel.

[0014] Preferably, the device is a pair of glasses, the supporting component is a glasses frame, the filter is mounted on the frame of the glasses frame, and the head of the frame is hinged to the temples;

[0015] When the device is an eye mask, the supporting component is an eye mask frame, and the eye mask frame is equipped with the filter at the eye mask frame;

[0016] When the device is a mask, the supporting component is a mask frame, and the mask frame is equipped with the filter at the mask glasses frame;

[0017] When the device is an eye protection lamp, the supporting component is a lampshade, which is fixed to the bracket, and a light source is provided in the lampshade. The filter is installed at the cover opening through which the light passes.

[0018] When the device is a goggles barrel, the supporting component is a barrel, and the barrel is equipped with the filter at the entrance of the light.

[0019] The present invention also provides a method for preparing the optical filter according to the present invention, comprising the following steps:

[0020] S1. Cutting the transparent substrate into pieces according to the target size, and then ultrasonically cleaning the cut substrate;

[0021] S2, placing the substrate on a coating umbrella in a vacuum chamber of a vacuum coating machine for preheating;

[0022] S3. Place silicon dioxide and titanium dioxide at the bottom of a vacuum furnace of a vacuum coating machine, sublime the silicon dioxide and titanium dioxide at a temperature ≥ 1800°C and a vacuum degree of 2E-3Pa to 6E-3Pa, and simultaneously rotate the coating umbrella to cause the sublimated silicon dioxide and titanium dioxide to collide and alternately crystallize on the surface of the substrate to form a coating layer;

[0023] The added mass of silicon dioxide or titanium dioxide accounts for 45% to 50% of the total mass of the two, and the number of rotations of the coated umbrella is greater than or equal to 86;

[0024] The cutoff depth of the manufactured filter is above OD1 on average.

[0025] Numerous experiments have shown that the wavelength range of red light transmitted by the coating layer on the surface of the substrate is determined by the preheating temperature of the vacuum coating machine, the sublimation temperature of silicon dioxide and titanium dioxide, the addition ratio of silicon dioxide and titanium dioxide, and the number of rotations of the coating umbrella. During the vacuum coating process, by controlling the number of rotations of the coating umbrella, that is, the thickness of the coating layer, the filter with the coating layer can reach the set center wavelength, thereby allowing only red light of a certain wavelength to pass through while blocking other wavelengths.

[0026] Preferably, in S2, the vacuum degree of the preheating treatment is 5-10 Pa and the temperature is 280°C-300°C.

[0027] After many experiments, it has been proved that preheating before coating and setting the vacuum degree of preheating to 5-10Pa and the temperature to 280℃-300℃ can further effectively ensure the uniformity of the subsequent coating layer, thereby effectively ensuring the filtering effect of the filter.

[0028] The present invention also provides an application of the optical filter according to the present invention, wherein the optical filter can be used to improve the activity of catalase in mitochondria of retinal cells, specifically: red light passing through the optical filter can increase the activity of catalase in mitochondria of retinal cells.

[0029] Beneficial effects of the present invention:

[0030] 1) The optical filter of the present invention allows red light of 671nm to 690nm to pass through when light or sunlight passes through the filter, and can reflect and prevent light of other frequencies from passing through. The red light that passes through can illuminate the retina, which can increase the activity of mitochondrial catalase in retinal cells. It can quickly improve retinal cell activity in a short period of time, delay aging, save eyesight, and significantly improve the aging of retinal photoreceptors in the human eye, playing a health-care role, and achieving the purpose of treating retinal aging in people over 40 years old;

[0031] 2) The method for preparing the optical filter of the present invention determines the wavelength range passing through the optical filter by controlling the preheating temperature of the vacuum coating machine, the sublimation temperature of silicon dioxide and titanium dioxide, the addition ratio of silicon dioxide and titanium dioxide, the number of rotations of the coating umbrella, and the coating time during the vacuum coating process, thereby obtaining a red light filter with a central wavelength of 671nm to 690nm, thereby reducing or preventing light of other wavelengths from passing through, achieving the purpose of selective light transmission, and having the advantages of simple operation and low cost. It has a value for promotion and application in the field of optical application technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1Schematic diagram of the structure of the optical filter of the present invention;

[0033] Figure 2 Schematic diagram of the structure of the optical glass in Example 1 of the present invention;

[0034] Figure 3 This is a result diagram of the wavelengths allowed to pass through by the filter prepared in Example 2 of the present invention;

[0035] Figure 4 Schematic diagram of the structure of glasses in Example 7 of the present invention;

[0036] Figure 5 A schematic diagram of the principle of light passing through the optical filter of the present invention to reach the human eye;

[0037] Figure 6 Schematic diagram of the structure of the eye mask in Example 8 of the present invention;

[0038] Figure 7 Schematic diagram of the structure of the mask in Example 9 of the present invention;

[0039] Figure 8 Schematic diagram of the structure of the eye protection lamp in embodiment 10 of the present invention;

[0040] Figure 9 Schematic diagram of the structure of the eye protection tube in embodiment 11 of the present invention.

[0041] Among them, 1-filter, 11-substrate, 111-circular, 112-elliptical, 113-square, 12-coating layer; 2-glasses, 21-frame, 22-head, 23-temples; 3-human eye; 4-light; 5-daylight; 6-red light with a wavelength of 671nm; 7-light of other wavelengths; 8-eye mask, 81-eye mask and glasses frame; 9-face mask, 91-face mask and glasses frame; 10-eye protection lamp, 101-lampshade, 102-bracket, 103-light source; 13-eye protection tube; 131-lens tube. DETAILED DESCRIPTION

[0042] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustration of the present invention.

[0043] It is not intended to limit the scope of protection of the present invention.

[0044] Example 1

[0045] like Figure 1 As shown, a filter comprises a transparent substrate 11, wherein at least one surface of the substrate 11 is provided with a coating layer 12;

[0046] The substrate 11 provided with the coating layer 12 allows red light with a wavelength of 671 nm to 690 nm to pass through, and can reduce or prevent light of other wavelengths from passing through.

[0047] The coating layer 12 is formed by alternating crystallization of titanium dioxide and silicon dioxide.

[0048] The thickness of the coating layer 12 is 7-8 μm.

[0049] The substrate 11 provided with the coating layer 12 has a transmittance greater than 80% for red light with a wavelength of 671 nm to 690 nm, and a transmittance of less than or equal to 0.01% for light of other wavelengths.

[0050] like Figure 2 As shown, the substrate 11 is optical glass with a thickness of 0.3 mm to 6.2 mm. The shape of the optical glass includes but is not limited to a circle 111 , an ellipse 112 or a square 113 . The optical glass can be flat or curved.

[0051] Example 2

[0052] A method for preparing a circular filter comprises the following steps:

[0053] S1. Use a fully automatic CNC glass cutting machine to cut the Schott glass according to the target size, and use ultrasonic cleaning to clean the cut Schott glass;

[0054] Among them, the target size and detection tools of Schott glass are shown in Table 1;

[0055] S2. Place the cleaned Schott glass on a coating umbrella in the vacuum chamber of a 1350 vacuum coating machine and perform a preheating treatment under the conditions of a vacuum degree of 6 Pa and a temperature of 285°C;

[0056] S3. Place silicon dioxide and titanium dioxide in a mass ratio of 9:11 into the bottom of the vacuum furnace of the vacuum coating machine. Under the conditions of vacuum degree of 3E-3Pa and temperature of 2100℃, sublime silicon dioxide and titanium dioxide. Rotate the coating umbrella at the same time to make the sublimated silicon dioxide and titanium dioxide collide and crystallize alternately on one side of the Schott glass to form a coating layer. The coating umbrella rotates 90 times. After the coating layer passes the online thickness test, stop the furnace, cool it down and take it out of the furnace.

[0057] After testing, the optical parameters of the Schott glass with the coating layer prepared in Example 2 are shown in Table 1.

[0058] Table 1 Target size, detection tool and optical parameters of Schott glass in Example 2

[0059]

[0060]

[0061] After testing, in this embodiment 2, the thickness of the coating layer on one side of the Schott glass is 7 μm, the number of crystal layers is 90, and the wavelength of red light that can pass through the Schott glass is 671 nm (as shown in FIG. Figure 3 As shown, the transmittance is greater than 90%, and 99.99% of other wavelengths of light are filtered out. Because this Schott glass allows red light with a wavelength of 671nm to pass through, this Schott glass filter has a therapeutic effect on aging retinal cells.

[0062] Among them, the number of crystallization layers of the coating layer is 90, which is determined by the number of rotations of the coating umbrella set by the control system of the 1350 vacuum coating machine. When the coating umbrella rotates one circle, it indicates that a crystal layer is formed on the surface of the Schott glass. Therefore, the number of crystallization layers of the coating layer is determined by controlling the number of rotations of the coating umbrella.

[0063] Experimental verification has shown that a higher cutoff depth filters out more light of other wavelengths. However, single-sided coating offers lower costs and a lower cutoff depth. Double-sided coating costs slightly more (primarily due to the need to shut down the furnace to cool, flip the filter on the coating umbrella, and then heat it up again for coating), but it also offers a higher cutoff depth. Therefore, when choosing a coating method, the choice should be based on actual needs.

[0064] Example 3

[0065] A method for preparing a circular filter comprises the following steps:

[0066] S1. Use a fully automatic CNC glass cutting machine to cut the Schott glass according to the target size, and use ultrasonic cleaning to clean the cut Schott glass;

[0067] Among them, the target size and detection tools of Schott glass are shown in Table 2;

[0068] S2. Place the cleaned Schott glass on a coating umbrella in the vacuum chamber of a 1350 vacuum coating machine and perform a preheating treatment under the conditions of a vacuum degree of 6 Pa and a temperature of 285°C;

[0069] S3. Place silicon dioxide and titanium dioxide in a mass ratio of 9:11 into the bottom of the vacuum furnace of the vacuum coating machine. Under the conditions of vacuum degree of 3E-3Pa and temperature of 2100℃, sublime silicon dioxide and titanium dioxide. Rotate the coating umbrella at the same time to make the sublimated silicon dioxide and titanium dioxide collide and crystallize alternately on one side of the Schott glass to form a coating layer. The number of rotations of the coating umbrella is set to 91 by the control system of the 1350 vacuum coating machine. After the coating layer passes the online thickness test, stop the furnace, cool it down and take it out of the furnace.

[0070] After testing, the optical parameters of the Schott glass with the coating layer prepared in Example 3 are shown in Table 2.

[0071] Table 2 Target size, detection tool and optical parameters of Schott glass in Example 3

[0072]

[0073]

[0074] Testing revealed that the coating layer on a single surface of the Schott glass in Example 3 was 7.1 μm thick and contained 91 crystal layers. The Schott glass allowed red light with a wavelength of 675 nm to pass through with a transmittance of >90%, while filtering out 99.99% of other wavelengths. Because the Schott glass allows red light with a wavelength of 675 nm to pass through, this Schott glass filter has a therapeutic effect on retinal cell aging.

[0075] Example 4

[0076] A method for preparing a circular filter comprises the following steps:

[0077] S1. Use a fully automatic CNC glass cutting machine to cut the Schott glass according to the target size, and use ultrasonic cleaning to clean the cut Schott glass;

[0078] Among them, the target size and detection tools of Schott glass are shown in Table 3;

[0079] S2. Place the cleaned Schott glass on a coating umbrella in the vacuum chamber of a 1350 vacuum coating machine and perform a preheating treatment under the conditions of a vacuum degree of 6 Pa and a temperature of 285°C;

[0080] S3. Place silicon dioxide and titanium dioxide in a mass ratio of 9:11 into the bottom of the vacuum furnace of the vacuum coating machine. Under the conditions of vacuum degree of 3E-3Pa and temperature of 2100℃, sublime silicon dioxide and titanium dioxide. Rotate the coating umbrella at the same time to make the sublimated silicon dioxide and titanium dioxide collide and crystallize alternately on one side of the Schott glass to form a coating layer. The number of rotations of the coating umbrella is set to 92 by the control system of the 1350 vacuum coating machine. After the coating layer passes the online thickness test, stop the furnace, cool down and take it out of the furnace.

[0081] After testing, the optical parameters of the Schott glass with the coating layer prepared in Example 4 are shown in Table 3.

[0082] Table 3 Target size, detection tool and optical parameters of Schott glass in Example 4

[0083]

[0084] Testing revealed that the coating layer on a single surface of the Schott glass in Example 4 was 7.15 μm thick and contained 92 crystal layers. The Schott glass allowed red light with a wavelength of 680 nm to pass through with a transmittance of >90%, while filtering out 99.99% of other wavelengths. Because the Schott glass allows red light with a wavelength of 680 nm to pass through, this Schott glass filter has a therapeutic effect on retinal cell aging.

[0085] Example 5

[0086] A method for preparing a circular filter comprises the following steps:

[0087] S1. Use a fully automatic CNC glass cutting machine to cut the Schott glass according to the target size, and use ultrasonic cleaning to clean the cut Schott glass;

[0088] Among them, the target size and detection tools of Schott glass are shown in Table 4;

[0089] S2. Place the cleaned Schott glass on a coating umbrella in the vacuum chamber of a 1350 vacuum coating machine and perform a preheating treatment under the conditions of a vacuum degree of 6 Pa and a temperature of 285°C;

[0090] S3. Place silicon dioxide and titanium dioxide in a mass ratio of 9:11 into the bottom of the vacuum furnace of the vacuum coating machine. Under the conditions of vacuum degree of 3E-3Pa and temperature of 2100℃, sublime silicon dioxide and titanium dioxide. Rotate the coating umbrella at the same time to make the sublimated silicon dioxide and titanium dioxide collide and crystallize alternately on one side of the Schott glass to form a coating layer. The number of rotations of the coating umbrella is set to 93 by the control system of the 1350 vacuum coating machine. After the coating layer passes the online thickness test, stop the furnace, cool down and take it out of the furnace.

[0091] After testing, the optical parameters of the Schott glass with the coating layer prepared in Example 5 are shown in Table 4.

[0092] Table 4 Target size, detection tool and optical parameters of Schott glass in Example 5

[0093]

[0094] Testing revealed that the coating layer on a single surface of the Schott glass in Example 5 was 7.20 μm thick and contained 93 crystal layers. The maximum wavelength of red light that could pass through the Schott glass was 685 nm, with a transmittance exceeding 90%, while 99.99% of light at other wavelengths was filtered out. Because the Schott glass allows red light with a wavelength of 685 nm to pass through, this Schott glass filter has a therapeutic effect on aging retinal cells.

[0095] Example 6

[0096] A method for preparing a circular filter comprises the following steps:

[0097] S1. Use a fully automatic CNC glass cutting machine to cut the Schott glass according to the target size, and use ultrasonic cleaning to clean the cut Schott glass;

[0098] Among them, the target size and detection tools of Schott glass are shown in Table 5;

[0099] S2. Place the cleaned Schott glass on a coating umbrella in the vacuum chamber of a 1350 vacuum coating machine and perform a preheating treatment under the conditions of a vacuum degree of 6 Pa and a temperature of 285°C;

[0100] S3. Place silicon dioxide and titanium dioxide in a mass ratio of 9:11 into the bottom of the vacuum furnace of the vacuum coating machine. Under the conditions of vacuum degree of 3E-3Pa and temperature of 2100℃, evaporate and sublime the silicon dioxide and titanium dioxide. At the same time, rotate the coating umbrella to make the sublimated silicon dioxide and titanium dioxide collide and crystallize alternately on one side of the Schott glass to form a coating layer. The number of rotations of the coating umbrella is set to 94 by the control system of the 1350 vacuum coating machine. After the coating layer passes the online thickness test, stop the furnace, cool it down and take it out of the furnace.

[0101] After testing, the optical parameters of the Schott glass with the coating layer prepared in Example 6 are shown in Table 5.

[0102] Table 5 Target size, detection tool and optical parameters of Schott glass in Example 6

[0103]

[0104] Testing revealed that the coating layer on a single surface of the Schott glass in Example 6 was 7.25 μm thick and contained 94 crystal layers. The Schott glass allowed red light with a wavelength of 690 nm to pass through with a transmittance of >90%, while filtering out 99.99% of other wavelengths. Because the Schott glass allows red light with a wavelength of 690 nm to pass through, this Schott glass filter has a therapeutic effect on retinal cell aging.

[0105] Example 7

[0106] like Figure 4 As shown, a pair of glasses 2 includes a supporting component, which is a glasses frame. The frame 21 of the glasses frame is equipped with a filter 1 made of Schott glass coating as in Example 2, and the head 22 of the frame 21 is hinged to the temple 23.

[0107] Among them, the coated Schott glass filter needs to be chamfered and polished around the edges before being installed in the corresponding frame.

[0108] like Figure 5 As shown, instructions for use are as follows: When wearing the glasses of Example 7, position the Schott glass filter 1 in a suitable position in front of the eye 3, allowing light 4 or sunlight 5 to enter at an angle close to perpendicular to the plane of the Schott glass filter. At this point, red light 6 with a wavelength of 671 nm can pass through the Schott glass filter and enter the retinal cells of the eye 3, while reducing or preventing light 7 of other wavelengths from passing through the Schott glass filter. The glasses should be worn for at least three minutes. The 671 nm red light 6 has a photoelectric effect on the mitochondria of the cone and rod cells of the retina 3, thereby increasing the activity of catalase in the mitochondria of the retinal cells, thereby treating and restoring retinal aging. Over 99.9% of the remaining light, including ultraviolet light, blue light, and infrared light, is reflected or blocked.

[0109] Example 8

[0110] like Figure 6 As shown, an eye mask 8 includes a supporting component, which is an eye mask frame. The eye mask frame has a filter 1 made of coated Schott glass, as described in Example 2, mounted on the eye mask frame 81. The coated Schott glass filter is chamfered and polished around its periphery before being mounted in the corresponding eye mask of the eye mask frame.

[0111] Instructions for use: When wearing the eye mask described in Example 8, position the Schott glass filter in a suitable position in front of the eye, allowing light from lamplight or sunlight to enter at a nearly perpendicular angle to the plane of the Schott glass filter. This allows red light with a wavelength of 671 nm to pass through the Schott glass filter and enter the retinal cells, while reducing or preventing light of other wavelengths from passing through the filter. Wear the mask for at least three minutes. The 671 nm red light has a photoelectric effect on the mitochondria of the retinal cones and rods, thereby increasing the activity of catalase in these mitochondria and promoting the treatment and restoration of retinal aging. Over 99.9% of the remaining light, including ultraviolet light, blue light, and infrared light, is reflected or blocked.

[0112] Example 9

[0113] like Figure 7 As shown, a mask 9 includes a support component, which is a mask frame. The mask frame is equipped with a filter as described in Example 2 at the mask frame 91. The coated Schott glass filter is chamfered and polished at its periphery before being installed in the corresponding mask of the mask frame.

[0114] Instructions for use: When wearing the mask described in Example 9, position the Schott glass filter in a suitable position in front of the eye, allowing light from lamplight or sunlight to enter at a nearly perpendicular angle to the plane of the Schott glass filter. This allows red light with a wavelength of 671 nm to pass through the Schott glass filter and enter the retinal cells, while reducing or preventing light of other wavelengths from passing through the filter. This mask should be worn for at least three minutes. The 671 nm red light has a photoelectric effect on the mitochondria of the retinal cones and rods, thereby increasing the activity of catalase in these mitochondria and promoting the treatment and restoration of retinal aging. Over 99.9% of the remaining light, including ultraviolet light, blue light, and infrared light, is reflected or blocked.

[0115] Example 10

[0116] like Figure 8 As shown, an eye protection lamp 10 includes a support member, which is a lampshade 101. Lampshade 101 is fixed to a bracket 102. A light source 103 is disposed within lampshade 101. A filter such as that described in Example 2 is mounted at the opening of lampshade 101 through which the light passes. The coated Schott glass filter is chamfered and polished around its perimeter before being mounted at the corresponding opening of lampshade 101.

[0117] Instructions for use: When the user turns on the eye protection lamp described in Example 10, position the Schott glass filter in a suitable position in front of the eye, allowing the light to enter at an angle close to perpendicular to the plane of the Schott glass filter. This allows red light with a wavelength of 671 nm to pass through the Schott glass filter and enter the retinal cells of the eye, while reducing or preventing light of other wavelengths from passing through the Schott glass filter. This light should be used for at least three minutes. The 671 nm red light has a photoelectric effect on the mitochondria of the retinal cones and rods, thereby increasing the activity of catalase in the mitochondria of these retinal cells, thereby treating and restoring retinal aging. Over 99.9% of the remaining light, including ultraviolet light, blue light, and infrared light, is reflected or blocked.

[0118] Example 11

[0119] like Figure 9 As shown, a goggle tube 13 includes a supporting member, which is a lens barrel 131. The lens barrel 131 can be a single barrel or a double barrel. The lens barrel 131 is installed with a filter such as that described in Example 2 at the entrance of the light or sunlight. The coated Schott glass filter is chamfered and polished at its periphery before being installed at the corresponding light entrance position of the lens barrel 131.

[0120] Instructions for use: When the user places the goggle tube of Example 11 in front of the eye, with the Schott glass filter positioned appropriately in front of the eye and allowing sunlight or lamplight to enter at an angle close to perpendicular to the plane of the Schott glass filter, red light with a wavelength of 671 nm can pass through the Schott glass filter and enter the retinal cells of the eye, while reducing or preventing light of other wavelengths from passing through the Schott glass filter. This can be used for at least three minutes. The 671 nm red light has a photoelectric effect on the mitochondria of the retinal cones and rods, thereby increasing the activity of catalase in the mitochondria of the retinal cells, thereby treating and restoring retinal aging. Over 99.9% of the remaining light, including ultraviolet light, blue light, and infrared light, is reflected or blocked.

[0121] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A method for preparing a filter, characterized in that: The optical filter comprises a transparent substrate (11), and a coating layer (12) is provided on at least one side of the substrate (11); The coating layer (12) is formed by alternating crystallization of titanium dioxide and silicon dioxide; The substrate (11) provided with the coating layer (12) has a transmittance greater than 80% for red light with a wavelength of 671nm to 690nm, and a transmittance of ≦0.01% for light of other wavelengths; The steps of the preparation method are as follows: S1. Cutting the transparent substrate into pieces according to the target size, and then ultrasonically cleaning the cut substrate; S2. placing the substrate on a rotatable coating umbrella in a vacuum chamber of a vacuum coating machine for preheating; S3. Place silicon dioxide and titanium dioxide at the bottom of a vacuum furnace of a vacuum coating machine, sublime the silicon dioxide and titanium dioxide at a temperature ≥ 1800°C and a vacuum degree of 2E-3Pa to 6E-3Pa, and simultaneously rotate the coating umbrella to cause the sublimated silicon dioxide and titanium dioxide to collide and alternately crystallize on the surface of the substrate to form a coating layer; Among them, the mass of silicon dioxide or titanium dioxide added accounts for 45% to 50% of the total mass of the two; The cutoff depth of the manufactured filter is above OD1 on average.

2. The method for preparing the optical filter according to claim 1, wherein: The thickness of the coating layer (12) is 7-8 μm.

3. The method for preparing the optical filter according to claim 1, wherein: The substrate (11) is optical glass, the thickness of the optical glass is 0.3 mm to 6.2 mm, and the shape of the optical glass includes but is not limited to circular (111), elliptical (112) or square (113).

4. An eye protection device, comprising a supporting component, characterized in that: The support component is installed with a filter made by the preparation method according to any one of claims 1 to 3 at a position for light to pass through. When the user wears or uses the device, red light with a wavelength of 671nm to 690nm can pass through the filter and enter the retinal cells of the eye, while reducing or preventing light of other wavelengths from passing through the filter.

5. The eye protection device according to claim 4, characterized in that: The supporting component includes but is not limited to a glasses frame, an eye mask frame, a mask frame, a lampshade or a lens barrel.

6. The eye protection device according to claim 5, characterized in that: When the device is a pair of glasses (2), the supporting component is a glasses frame, the filter is mounted on the frame (21) of the glasses frame, and the head (22) of the frame (21) is hinged to the temple (23); When the device is an eye mask (8), the supporting component is an eye mask frame, and the eye mask frame is provided with the filter at the eye mask frame (81); When the device is a mask (9), the supporting component is a mask frame, and the mask frame is provided with the filter at the mask glasses frame (91); When the device is an eye protection lamp (10), the supporting component is a lampshade (101), the lampshade (101) is fixed on the bracket (102), a light source (103) is provided in the lampshade (101), and the lampshade (101) is provided with the filter at the cover opening through which the light passes; When the device is a goggle barrel (13), the supporting component is a barrel (131), and the barrel (131) is provided with the filter at an entrance through which light passes.

7. The preparation method according to claim 1, characterized in that In the above-mentioned S2, the vacuum degree of the preheating treatment is 5-10 Pa, and the temperature is 280°C-300°C.

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