Optical lens manufacturers material classification
Optical lens manufacturers include optical glass lenses and high-refractive index lenses (usually called ultra-thin filters), which have high hardness and good wear resistance. Generally, their quality and various parameters will not change with time. However, the impact resistance and weight of Optical lens manufacturersare slightly inferior to resin lenses.
Resin lenses are generally much lighter than glass lenses, and their impact resistance is better than that of glass lenses. Due to their soft characteristics, the resin lenses and coated lenses in Optical lens manufacturers should be careful not to let the mirror surface directly contact hard objects. When scrubbing, it needs to be cleaned with water (or mixed with a small amount of detergent), and then use a special test cloth or High-quality tissue paper wicks away water droplets from eyeglass lenses. In addition, Optical lens manufacturers should be careful to use coated lenses in places with poor environmental conditions, so as not to be stained with dirt and difficult to clean.
Cosmic (PC) lenses: high refractive index, strong, but easy to wear. Mostly used in children's eyeglasses, frameless fittings or athlete's goggles
Spherical and aspherical lenses
The traditional spherical lens, not only the lens is thick, but also the phenomenon of distortion and deformation occurs when looking through the periphery of the lens, which is called aberration. By observing the wearer through the spherical lens, the deformation of the facial contour can also be clearly found. Aspherical lenses not only reduce the thickness of the center, center and edge of the lens, make the lens thinner and eliminate peripheral aberrations, and give the wearer natural vision. For consumers with high visual acuity, it may be more convenient to choose aspherical lenses. Suitable.
