Focus on challenging optical components

Optimal defects of optical glass lenses

by:ChangHui     2020-07-22
Advantages: under the high refractive index has lower dispersion coefficient, good hardness, easy dyeing, pervious to light and thin lens with a contrast, uv protection, suitable for all glasses, glass lenses of the refractive index of 1. 7 - 1. 89. Defect: the lens is heavy, fragile, poor impact resistance, is not suitable as a child, teenager wearing, low security, inappropriate half box, wu kuang frames. 吗? Optimal defects of optical resin lenses advantages: light weight. Not easy to break: if the lens is break, not only fragments are less, and less sharp, can make eye and facial injury phenomenon reduced to a minimum. Anti-fog strong sex: due to the resin lenses of thermal conductivity was lower than those of glass, not easily confused by steam, hot water gas attack unknown phenomenon, confused even attack will also soon. Can prevent dent: general heat small volume material briefly in the glass forming dent and colors, but if touched the resin lens, bounce off automatically, formed in the lens looks no trace. Defect: a brief scratches: scraping resistance of resin lens is glass lenses. Thickness of the thick glass lenses: the love of beauty is human talent, too thick lens is very awkward, deepness myopia more regarded as more difficult. Although recently there is a lot of improvement, but still relatively thick glass lenses. Not resistant to high temperature, although for thermosetting resin material, but once the plating on multilayer film, multilayer membrane appearance may attack by high temperature cracking phenomenon.
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