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A thin lens is a type of lens where the thickness of the central part is relatively large compared to the curvature radius of both sides. In the early days, cameras were only equipped with a convex lens, hence the name "single lens". With the increasing development of technology, modern lenses have several different forms and functions of convex and concave lenses to form a converging lens, known as a "compound lens". The concave lens in a compound lens serves to correct various aberrations. Optical glass has high transparency, purity, colorless, uniform texture, and good refractive ability, so it is the main raw material for lens production. Due to the different chemical composition and refractive index, optical glass includes flint glass, coronal glass and lanthanum crown glass.
隐藏域元素占位
A lens is an optical element made of transparent substances such as glass, crystal, etc. Convex lens: thick in the middle and thin at the edge, with three types: biconvex, flat convex, and concave convex; Concave lens: thin in the middle and thick in the edge, with three types: double concave, flat concave, and convex concave. Lenses play an important role in fields such as astronomy, military, transportation, medicine, and art. There are two types of lenses: plastic and glass, and glass lenses are more expensive than plastic. The lens is composed of several lenses. Lens can be widely used in security, vehicle, digital camera, laser, optical instrument and other fields. With the continuous development of the market, lens technology is also more and more widely used.
隐藏域元素占位
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