Lens can be widely used in security, vehicle, digital camera, laser, optical instruments and other fields. With the continuous development of the market, lens technology is more and more widely used.
Lens is made according to the law of refraction of light. Lens is an optical element made of transparent material (such as glass, crystal, etc.). A lens is a refractor whose refracting surface is a transparent body with two spheres (part of the sphere) or one sphere (part of the sphere) and one plane. Its images are real and virtual.
Convex lens: thick in the middle, thin edge, biconvex, flat convex, concave convex three kinds;
Concave lens: thin in the middle, thick at the edge, double concave, flat concave and convex concave.
