Device for selectively filtering light rays

Abstract

The invention provides a device for selectively filtering light rays. The device comprises substrate resin, an ultraviolet light absorber and a colorant. Under the circumstance that an antireflection film is effectively used, the device can effectively prevent the light rays within the range of 400 nm to 450 nm from entering the eyes, the transmittance of the light rays within the range of 500 nm to 700 nm is kept over 90%, and the transmittance of the light rays near 600 nm reaches nearly 99%. The device can simulate xanthophylls on the retinas of the eyes of a person to absorb blue light; under the circumstance that the blue light in the light rays is filtered out, a wearer of glasses cannot feel that the light rays are darkened, the blue light is well filtered out, and the eyes are protected. Thus, the glasses made of the device enable the wearer to feel relaxed in eyes, reduce fatigue of the eyes, and are particularly suitable for people needing to look at devices such as a television, a mobile phone, a computer and a tablet computer with the high blue light intensity for a long time.

Description

technical field [0001] The invention relates to a device for selectively filtering light, in particular to a device for selectively filtering light to protect human eyes for people who look at liquid crystal screens for a long time, and a manufacturing and production method of the device. Background technique [0002] The reflection of the LCD screen is composed of three colors of light sources, namely red, green and blue. In order to produce different colors through the light sources of these three colors, the three light sources need to be combined, which leads to the fact that in order to produce a specific color, the light intensity of the wavelength of the specific color will be much higher than the corresponding light intensity in nature. However, blue light has been confirmed by many studies to accelerate the oxidation of cells in the macular area of ​​the retina, and excessive exposure can even damage visual cells. If the macular area is exposed to blue light for a ...

AI Technical Summary

Problems solved by technology

The product using this technology is between 400-500nm, and the two sides can reflect about 25% of the light at most, and can reflect about 10% of the light on average, while the product using the ordinary anti-reflection film can reduce the use of matrix resin by about 10% %, the extra 10% increase is not obvious, and the effect of improving eye comfort for long-term viewing of computers is not obvious, and the interference of light works on both sides of the lens, which will cause a large amount of ambient light to be reflected to the direction of the eyes when passing through the inner side of the lens , cause strong light interference, and may increase the intake of blue light between 400-500nm

The other is the dyed film, which absorbs the pigment on the surface of the lens, but this kind of technology has extremely high requirements for the temperature of the dyeing solution and the concentration of the pigment, which makes the color of the lens difficult to control and unstable, and the cost of mass production is high

In addition, there is another kind of film filter lens, but the film filter lens will make the blue light filtered by the LCD screen insufficient, and the wearer who wears the eyes looks at the LCD screen for a long time will still cause damage to the eyes, resulting in eye discomfort for the wearer. Symptoms; the film filter lens is also easy to filter wavelengths exceeding non-blue light, resulting in a decrease in light transmittance of the lens, resulting in a decrease in comfort, and the previously used dyes are not used in high refractive index spectacle lenses

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