Lens: A piece of glass or other transparent material with one or more curved surfaces through which objects appear clear, larger, or smaller. Usually used in glasses, cameras, telescopes, etcClassification: Lenses can be divided into the following five types according to different materials:Resin lens special lens space lens glass lens PVC lensThe index of refraction refers to the refractive index of the lens, and the higher the index, the thinner the lens. Refractive index generally: 1.49, 1.56, 1.61, 1.67, 1.74.BORIS OPTICALis one of the most Potential Finished and Semi-Finished Optical Lenses factory located in Danyang City, China. It was establish in 2012 with covering 20000 spm and 150 employees. The annual production and sales of lenses are 30 million pieces, and the annual sales have exceeded 100 million for five consecutive years.Our Key & Advantage Products:Single Vision Lens:1.49;1.56;1.59;1.60;1.67;1.74Bifocal Lens: 1.49; 1.56Progressive Lens: CR-39; 1.56; 1.60Functional Lens: Blue Cut, Photochromic; Photochromic +UV420 Blue cut; Sunglasses; Polarized; PolycarbonateRX Service: Free Form; Special Coating; Special Power Range
Lens: A piece of glass or other transparent material with one or more curved surfaces through which objects appear clear, larger, or smaller. Usually used in glasses, cameras, telescopes, etcClassification: Lenses can be divided into the following five types according to different materials:Resin lens special lens space lens glass lens PVC lensThe index of refraction refers to the refractive index of the lens, and the higher the index, the thinner the lens. Refractive index generally: 1.49, 1.56, 1.61, 1.67, 1.74.BORIS OPTICALis one of the most Potential Finished and Semi-Finished Optical Lenses factory located in Danyang City, China. It was establish in 2012 with covering 20000 spm and 150 employees. The annual production and sales of lenses are 30 million pieces, and the annual sales have exceeded 100 million for five consecutive years.Our Key & Advantage Products:Single Vision Lens:1.49;1.56;1.59;1.60;1.67;1.74Bifocal Lens: 1.49; 1.56Progressive Lens: CR-39; 1.56; 1.60Functional Lens: Blue Cut, Photochromic; Photochromic +UV420 Blue cut; Sunglasses; Polarized; PolycarbonateRX Service: Free Form; Special Coating; Special Power Range
The dyeing lensesWith the rapid development of glasses science and technology, resin glasses with its light, safety, light transmittance close to optical glass and other advantages into the consumer market of glasses, and more and more varieties, never hard to hard; From low refractive index to medium refraction to high refraction; Never change color to dye, and even develop to change color.The dyed lens is made by soaking the resin lens in hot water dissolved with organic pigment to make the lens colored. The shades of color can be controlled to a standard level, and can be dyed a consistent color throughout the lens, or can be gradually changing colors.The dye is dispersed in a certain proportion into the solvent (dyeing solution), and the lens is immersed in the dyeing solution at a certain speed and frequency through the dyeing device, and the dye gradually penetrates into the lens matrix to make the lens color darker. The typical molecular structure of a dye is shown in the figure below. It can be seen that the structure contains various chromophore groups, which have strong absorption in a specific range of the visible spectrum, resulting in various colors. Under suitable process parameters, lenses can obtain a specific uniform color, also known as solid color, dyeing depth or gradient dyeing depth.
In life, there are too many light sources will produce harmful light, especially the sun; There are three kinds of light emitted from sunlight: visible light, infrared light and Ultraviolet light. Among them, ultraviolet light causes serious damage to human skin and eyes. Above, Visible light ray (310~780nm); Ultraviolet rays are divided into UVA, UVB, UVC (310nm) and above, Blue light, among which UVA, UVB, UVC are harmful rays. If exposed to the sun for a long time, they will cause damage to the body. UVB has a serious impact on vision, and Tanning Ray is the light that burns black skin. Most corners of the eye absorb this UVB light, so be sure to block it out. Polarized sunglasses because it has the function of polarizing light, so it can block all the harmful light but does not affect the transmission of visual light, can really achieve the function of protecting the eyes. Polarized sunglasses in addition to the basic UV protection function, but also anti-glare, road reflection light, water scale light, etc., suitable for driving, fishing, tourism, daily wear.
