Glass efficiently transmitting 290-305 nm ultraviolet light and visible light and blocking sunlight of other wavelengths, and use thereof

Abstract

Glass efficiently transmitting 290-305 nm ultraviolet light and visible light and blocking sunlight of other wavelengths. The glass is either multi-component glass composed of SiO2, B2O3, Na2O, ZnO, BaO, K2O, CaO, and Sb2O3 and doped with the rare earth element dysprosium, or prepared by adding a 0.2-0.5 μm dysprosium film layer to a glass substrate made of SiO2, B2O3, Na2O, ZnO, BaO, K2O, CaO, and Sb2O3. When the thickness is 1 mm, the glass prepared by either of the two methods has light transmittance of 75-85% for 290-305 nm ultraviolet light that promotes the synthesis of vitamin D in human body, and can efficiently transmit visible light that has a caring effect on human skin and spirit, and mostly block ultraviolet light harmful to human body and infrared light that causes a sensation of heat; thus, the glass can achieve a health care function for human by sunlight that transmits through the glass without the concern of tanning and heat.

Description

Glass that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks sunlight of other wavelengths and its application Technical Field

[0001] The present invention belongs to the field of glass material preparation, and in particular relates to glass that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks sunlight of other wavelengths, and applications thereof. Background Art

[0002] Sunbathing promotes metabolism, enhances calcium and phosphorus absorption, stimulates vasodilation, increases blood flow, improves skin and tissue nutrition, and boosts immunity, all of which contribute to health and slows aging. However, sunlight is composed of visible light (400-780nm), infrared (>780nm) with wavelengths longer than visible light, and ultraviolet (<400nm) with wavelengths shorter than visible light. Of all solar radiation, visible light accounts for approximately 50%, infrared for about 43%, and ultraviolet radiation for only about 7%. Ultraviolet radiation is further divided into far-ultraviolet (UVC) (wavelength 100-280nm), medium-wave ultraviolet (UVB) (wavelength 280-315nm), and long-wave ultraviolet (UVA) (wavelength 315-400nm).

[0003] Far-UVC is largely absorbed by the Earth's atmosphere, and the amount that reaches the ground is very weak, so it has no direct effect on the human body. However, medium-wave UVB and long-wave UVA, which reach the Earth's surface and reach the human body, have strong physiological and biochemical effects on the body. The 290-305nm band of medium-wave UVB plays a vital role in maintaining human health and supporting growth and development. Bone growth, vitamin D synthesis, and the prevention of anemia and tuberculosis all rely primarily on this wavelength. Less than 10% of the vitamin D in the human body comes from food; the majority comes from exposure to UV rays in this wavelength band. Therefore, this wavelength band is called the "health ray." Other wavelengths of medium-wave UVB and long-wave UVA, on the other hand, primarily cause harmful effects on the human body, including skin burns, sagging, aging, oxidative stress dermatitis, and even tumors and cancer. They can also cause vitreous opacities and cataracts, and weaken the immune system. This wavelength band is also known as the tanning band.

[0004] Because the visible portion of sunlight has less energy, aside from the blue light component that can cause skin pigmentation and influence the brain's circadian rhythm through the visual pathway, it has few adverse effects on the human body and primarily has beneficial effects, particularly on the skin. The infrared portion of sunlight primarily produces a warming effect on the body. While far-infrared light (wavelengths of 4 to 14 μm) is beneficial, high levels of near-infrared light (wavelengths of 780 nm to 1.5 μm) and mid-infrared light (wavelengths of 1.5 to 4 μm) can directly cause adverse effects on the skin, such as increased skin temperature, capillary dilation, congestion, and increased epidermal water evaporation. These effects primarily manifest as red papules, premature aging, and pigmentation disorders. Furthermore, these effects can lead to decreased vision and corneal ulcers.

[0005] Therefore, sunbathing directly in the sun is generally not recommended. Instead, it's best to use glass that blocks and attenuates the ultraviolet and infrared rays in sunlight. However, ordinary glass is largely impermeable to UVB and medium-wave ultraviolet rays, and only transmits long-wave ultraviolet rays (UVA) with a wavelength of 315 to 400 nm. As mentioned above, long-wave UVA affects melanin in the epidermis and is therefore also known as the tanning zone. Therefore, glass rooms constructed of ordinary glass not only fail to provide health benefits but can also have adverse effects. To this end, attempts have been made to develop glass that is translucent to UVB and medium-wave ultraviolet rays, such as invention patent CN202110160462.X, "Glass Transmitting Medium-Wave Ultraviolet Rays, Its Preparation Method, and Application," and the "High Refractive Index Ultraviolet-Transmitting Glass" reported in China Laser, Vol. A22, No. 9, 1995. However, while these glasses transmit UVB light, they indiscriminately transmit all UVB wavelengths, including the 280-290nm and 305-315nm UVB bands, which can cause skin burns, sagging, aging, tumors, and cancer. Furthermore, they offer little protection against UVA, the "tanning zone." Therefore, while such glasses can provide some beneficial UV radiation, the effects of other harmful UV rays are too strong, resulting in an effect comparable to sun exposure. To date, there have been no reports of glasses that selectively transmit only the beneficial 290-305nm UV and visible light at high rates, while largely blocking other harmful UVB and UVA wavelengths.

[0006] Summary of the Invention

[0007] To overcome the shortcomings of the above-mentioned existing technologies, the purpose of the present invention is to provide a glass that efficiently transmits 290-305nm ultraviolet and visible light and largely blocks sunlight of other wavelengths. It can largely block harmful ultraviolet light bands and near- and mid-infrared rays, and convert harmful ultraviolet rays into beneficial visible light through the down-conversion effect.

[0008] The invention also discloses an application of glass that can efficiently transmit 290-305nm ultraviolet rays and visible light and mostly block sunlight of other wavelengths.

[0009] The purpose of the present invention is achieved through the following technical solutions:

[0010] Solution 1: A glass that efficiently transmits 290-305nm ultraviolet and visible light and blocks sunlight of other wavelengths, wherein the composition of the glass comprises, by weight percentage:

[0011] and doped with 0.5-5 mol% of rare earth element dysprosium.

[0012] Furthermore, the glass blocks light with a wavelength shorter than 280 nm, has a transmittance of 20-30% for light with a wavelength of 280-290 nm, 80-90% for light with a wavelength of 290-305 nm, 25-35% for light with a wavelength of 305-400 nm, 80-90% for visible light with a wavelength of 400-780 nm, and 30-40% for infrared light with a wavelength of 790-2000 nm.

[0013] Solution 2: A glass that efficiently transmits 290-305nm ultraviolet and visible light and blocks sunlight of other wavelengths, comprising a glass substrate and a dysprosium film layer, and includes the following steps:

[0014] (1) Prepare the glass substrate, wherein the composition of the glass substrate comprises, by weight percentage:

[0015] (2) A dysprosium film layer is plated on the surface of the glass substrate prepared above.

[0016] Furthermore, the thickness of the dysprosium film layer is 0.2-0.5 μm.

[0017] Furthermore, the glass substrate plus the dysprosium film layer with a thickness of 0.2-0.5 μm basically blocks light with a wavelength shorter than 280 nm, has a transmittance of 20-30% for light with a wavelength of 280-290 nm, a transmittance of 75-85% for light with a wavelength of 290-305 nm, a transmittance of 20-30% for light with a wavelength of 305-400 nm, a transmittance of 85-93% for visible light with a wavelength of 400-780 nm, and a transmittance of 30-40% for infrared light with a wavelength of 790-2000 nm.

[0018] The invention relates to an application of glass that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks sunlight of other wavelengths. The application can be applied to home glass windows, glass ceilings, outdoor swimming pool glass covers, sunbathing glass rooms, optical instruments and equipment, light-emitting devices, and medical devices that require ultraviolet treatment, which need to selectively transmit beneficial ultraviolet rays and visible light that can help the human body synthesize vitamin D and have health-care effects.

[0019] The present invention has the following advantages and beneficial effects compared to the prior art:

[0020] The health-preserving glass disclosed in this invention selectively transmits UVB (290-305nm), which plays a vital role in vitamin D synthesis in the human body, and visible light, which has a nourishing and healthy effect on both the mind and the skin. It largely blocks other harmful or adverse UVB and UVA rays, as well as near- and mid-wave infrared rays that can cause heat-induced skin dehydration, cracking, aging, and burns. Glass made with components such as boron trioxide, barium oxide, and silicon dioxide, according to the present invention, transmits UVB and UVA wavelengths greater than 285nm. Zinc oxide strongly absorbs UVB wavelengths between 300-400nm, while the rare earth element dysprosium converts UVB wavelengths between 330-460nm into visible light through a down-conversion effect. The combined action of zinc oxide and dysprosium largely blocks harmful UVB and UVA wavelengths between 305-400nm.

[0021] While blocking harmful or adverse effects on the human body, the rare earth element dysprosium down-converts harmful UVB and long-wave UVA rays into beneficial visible light, enhancing visible light that nourishes and nourishes the body, from the mind to the skin. Sunbathing through the health-preserving glass of this invention produces beneficial photobiological effects on the human body. The selectively transmitted 290-305nm UVB rays promote vitamin D synthesis and bone growth, combat anemia, tuberculosis, osteoporosis, and softening, promote growth in children, and prevent rickets. The enhanced long-wave visible light promotes blood circulation, enhances immunoglobulin production, calms and relaxes nerves, increases skin elasticity, smoothes wrinkles and stretch marks, and slows skin aging. Because harmful UVA and other ultraviolet rays are blocked, sunburn is prevented, and there's no need to worry about the carcinogenic effects of harmful UV rays. Because it also significantly attenuates near- and mid-wave infrared radiation, it eliminates the sensation of heatiness caused by infrared heat generation, as well as the problems associated with skin dehydration, red papules, premature aging, and pigmentation disorders caused by infrared thermal effects. The health-preserving glass of the present invention can be widely used to manufacture various sunbathing glass houses and installed on residential balconies, French windows, and other locations. This makes it a powerful aid for sunbathing for the general public, especially the elderly, pregnant women, and children. They can conveniently enjoy a sunbath at home, which generates beneficial UV rays to synthesize vitamin D, promoting good health without the potential negative effects of conventional naked sunbathing, such as UV damage, sunburn, and heatstroke.

[0022] The health-preserving glass of the present invention has a simple preparation method and is easy to operate. It also exhibits excellent chemical stability, is resistant to oxidation and aging, and possesses strong mechanical strength, a simple structure, good stability, and resistance to oxidation and aging. It can be widely used in the construction of sunbathing glass rooms, home windows, glass ceilings, and outdoor swimming pool glass covers (rooms), as well as in optical instruments and equipment that require selective transmission of beneficial ultraviolet and visible light, medical devices that require specific ultraviolet light for treatment, and light-emitting devices that emit light of specific wavelengths. It has excellent market development prospects. DETAILED DESCRIPTION

[0023] The purpose of the present invention is described in further detail below with reference to the accompanying drawings and specific examples. The examples cannot be described one by one here, but the implementation methods of the present invention are not limited to the following examples.

[0024] Example 1

[0025] A glass doped with the rare earth element dysprosium effectively transmits 290-305nm ultraviolet and visible light while blocking sunlight of other wavelengths. The raw materials are weighed in the following weight percentages: SiO2 60.6%, B2O3 12.8%, Na2O 11.2%, ZnO 5%, BaO 5.6%, K2O 4%, CaO 0.6%, O3Sb2 0.4%, and then doped with 3 mol% of the rare earth element Dy via powder doping. 3+ .

[0026] After the raw material powders are fully mixed, the mixture is melted in a crucible at a temperature of 1200°C. The melt is then pressed into sheets or poured into a preheated copper mold to form glass products of various shapes.

[0027] The prepared dysprosium-doped multi-component glass, with a thickness of 1 mm, basically blocks light with a wavelength shorter than 280 nm, has a transmittance of 20-30% for light with a wavelength of 280-290 nm, 80-90% for light with a wavelength of 290-305 nm, 25-35% for light with a wavelength of 305-400 nm, 80-90% for visible light with a wavelength of 400-780 nm, and 30-40% for infrared light with a wavelength of 790-2000 nm. It is ideal for use in various sunbathing glass houses and installations on balconies, French windows, and other areas. Sunbathing allows users to receive an appropriate amount of 290-305nm ultraviolet light, which promotes vitamin D synthesis in the human body, as well as visible light, which is beneficial for both the skin and the mind. Without the worry of harmful UVB and UVA rays that can cause tanning or even skin cancer, it also significantly reduces the transmission of near- and mid-infrared radiation, minimizing sunburn. This allows for comfortable sunbathing and provides excellent bone and skin health benefits. It also helps prevent anemia, tuberculosis, osteoporosis, and softening, promotes growth and development in children, prevents rickets, helps boost immunity in pregnant women and the bone development of their fetuses, and provides a calming and relaxing effect. This glass, which allows sunlight to pass through it, offers health and wellness benefits.

[0028] Example 2

[0029] Adding Dy to the surface of multi-component glass substrate 3+ This glass, composed of a film layer, efficiently transmits 290-305nm ultraviolet and visible light while blocking sunlight of other wavelengths. The raw materials are weighed according to the following weight percentages: SiO2 61.6%, B2O3 12.8%, Na2O 10.2%, ZnO 5.4%, BaO 5.8%, K2O 3.2%, CaO 0.6%, and O3Sb2 0.4%.

[0030] After the raw material powders were fully mixed, they were preheated at 300°C for 20 minutes, then melted at 1200°C, and then poured into a preheated copper mold and annealed at 400°C for 3 hours to form a glass substrate. -2 Pa~6×10 -2 Pa is evaporated and deposited onto the surface of a glass substrate, which is then annealed in air to a film thickness of 0.3 μm. This produces the glass that efficiently transmits ultraviolet and visible light with a wavelength of 290-305 nm and blocks sunlight of other wavelengths. The resulting glass, coated with a dysprosium film on the surface of the glass substrate, substantially blocks light with a wavelength shorter than 280 nm, achieving a transmittance of 20-30% for light with a wavelength of 280-290 nm, 75-85% for light with a wavelength of 290-305 nm, 20-30% for light with a wavelength of 305-400 nm, 85-93% for visible light with a wavelength of 400-780 nm, and 30-40% for infrared light with a wavelength of 790-2000 nm. This product can transmit 290-305nm ultraviolet light, which plays an important role in the synthesis of vitamin D in the human body, with high transmittance. At the same time, it absorbs and blocks most of the 280-290nm and 305-400nm UVA ultraviolet rays in the UVB spectrum that are harmful to the human body, converting them into red and yellow visible light that is beneficial to the human body, thereby enhancing the health-care and maintenance effects of these visible light rays on the human body. Sunbathing glass made with this product can provide excellent health-care and beauty effects on the human body.

[0031] The above specific implementation manner is a preferred embodiment of the present invention and does not limit the present invention. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A glass that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks other wavelengths of sunlight, characterized in that: The composition of the glass includes by weight percentage: And doped with 0.5-5mol% of rare earth element dysprosium.

2. The glass according to claim 1 that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks other wavelengths of sunlight, characterized in that: The glass blocks light with a wavelength shorter than 280nm, has a transmittance of 20-30% for light with a wavelength of 280-290nm, 80-90% for light with a wavelength of 290-305nm, 25-35% for light with a wavelength of 305-400nm, 80-90% for visible light with a wavelength of 400-780nm, and 30-40% for infrared light with a wavelength of 790-2000nm.

3. A glass that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks other wavelengths of sunlight, characterized in that: The method is composed of a glass substrate and a dysprosium film layer, and includes the following steps: (1) Preparing the glass substrate, the composition of the glass substrate includes, by weight percentage: (2) A dysprosium film is plated on the surface of the glass substrate prepared as above.

4. The glass according to claim 3 that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks other wavelengths of sunlight, characterized in that: The thickness of the dysprosium film layer is 0.2-0.5 μm.

5. The glass according to claim 4 that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks other wavelengths of sunlight, characterized in that: The glass blocks light with a wavelength shorter than 280nm, has a transmittance of 20-30% for light with a wavelength of 280-290nm, 75-85% for light with a wavelength of 290-305nm, 20-30% for light with a wavelength of 305-400nm, 85-93% for visible light with a wavelength of 400-780nm, and 30-40% for infrared light with a wavelength of 790-2000nm.

6. Use of the glass according to claim 1 or 3 that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks other wavelengths of sunlight, characterized in that: It can be applied to home glass windows, glass ceilings, outdoor swimming pool glass covers, sunbathing glass rooms, optical instruments and equipment, light-emitting devices, and medical devices that need to selectively transmit beneficial ultraviolet rays and visible light that can help the human body synthesize vitamin D and have a health-care effect.

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