The CR39 Polaroid lens is an organic material with a high molecular chain structure and a three-dimensional network structure. The structure between the molecules is relatively relaxed and there is room for relative displacement between the molecular chains....
Because of the gap between the molecular chains, so the number of molecules per unit volume is small, determines the advantages of resin lenses: low specific gravity, light texture, is a glass lens 1/3-1/2....
Good transmittance: in the visible region, the resin lens transmittance is close to glass; in the infrared region, slightly higher than glass; in the ultraviolet region, the transmittance decreases with the decrease of wavelength at 0.4um, and almost all the light with wavelength less than 0.3um is absorbed, so the transmittance is poor....
Tea is recognized as the best lens color in sunglasses products. It absorbs almost 100% of ultraviolet and infrared radiation; and soft tones make vision comfortable, so that the eyes are not easy to fatigue.
Polycarbonate: PC material, specific gravity 1.2, non-flammable, odorless non-toxic resin, in line with FDA and the United States Drug Administration regulations, its characteristics with PC lenses....
Discoloration function: add silver halide chemicals to the lenses, so that the original transparent colorless lenses, when exposed to strong light will become colored lenses....
Polarizer is the full name of polarizer, LCD imaging must rely on polarized light, all liquid crystals have two polarized light plates close to the liquid crystal glass, forming a total thickness of about 1 mm of liquid crystal. If any polarizer is missing, the LCD will not be able to display the image....
The basic structure of the polarizer includes: the most intermediate PVA (polyvinyl alcohol), two layers of TAC (cellulose triacetate), PSA film (pressure sensitive adhesive), Release film (release film) and Protective film (protection film)...
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