Advantages And Disadvantages Of Optical Resin Glasses
Resin lens is a kind of organic material, inside is a kind of polymer chain structure, the connection is a stereo net structure, the molecular structure is relatively slack, the molecular chain has the space which can produce relative displacement. The light transmittance is 84%-90%, the transmission is good, and the optical resin lens has strong impact resistance. Resin is a kind of hydrocarbon (hydrocarbon) secretion from many kinds of plants, especially conifers. Because of its special chemical structure and can be used for this latex paint and adhesives are valued. It is a mixture of multiple polymers, so there are different melting points.
Resin can be divided into natural resin and synthetic resin two. Resin species are very much, widely used in people's light industry and heavy industry, in the daily life is often seen, such as plastic, resin glasses, paint and so on. Resin lenses are used for the chemical processing of raw materials to synthesize polished lenses. Optical Resin Glasses
Advantages: Resin lens is a kind of optical lens with resin as material. There are many kinds of materials, compared with glass lenses, has its unique advantages: 1, light. The general resin lens is 0. 83-1. 5, and optical glass 2. 27. $number。 2. Strong impact resistance. The impact of the resin lens is generally Inter 10k, is several times the glass, therefore not easy to break, safe and durable. 3. Good transmittance. In the visible area, the transmittance of the resin lens is similar to that of the glass, the infrared light region is slightly higher than the glass, and the ultraviolet area is 0. 4um begins to decrease the transmittance of the wavelength, and the wavelength is less than 0. 3um of light absorbs almost entirely. 4. Low cost. Injection molding of the lens, just create a precise mold, it can be a large number of production, saving processing costs and time. 5, can meet the special needs. such as aspheric lenses are not difficult to make, and glass lenses are difficult to do. Disadvantages are: surface wear resistance, chemical ability than glass poor, easy scratches on the surface, water absorption ratio glass, these shortcomings can be improved by coating methods. The fatal disadvantage is that the thermal expansion coefficient is high, the thermal conductivity is poor, the softening temperature is low, the deformation is easy and the optical property is affected.Optical Resin Glasses
Scratch resistance: Refers to the lens surface under external force to the lens surface transmittance of the degree of damage. The scratching of the lens is an important factor affecting the service life and visual effect of the lens. Domestic commonly used friction fog value (HS), the value is generally between 0.2-4.5, the lower the better. The Bayer method is used in foreign countries, the value is between 0.8-4, the higher the better. Generally referred to the hard resin lens, its scratch resistance than the general resin lens better.Optical Resin Glasses