Lens, lens or mirror heart, is mounting after the heart painting, suitable for clamped in the frame, so that the mirror heart. In the form of horizontal, vertical can be, is a simple, convenient installation type.

Classification: the lens according to the different materials can be divided into the following four:

Resin lens special lens a lens space glass lens

The main classification

Glass lens

Glass lens, with more than any other lens material characteristics of scratch, butrelative to its weight is heavy, the relative refractive index: common tablets for 1.523,thin film: more than 1.72, up to 2.

The main raw material for glass lens is the optical glass. The refractive index than the resin lens with high degree, so in the same conditions, the glass lens than resin thin lenses. Glass lens transmittance and mechanical and chemical properties are quite good, have a constant refractive index, stable physical and chemical properties. No color lens optical white (white tablets), pink piece of colored in the piece calledKeluokesai lens (red chip). Keluokesai lens can absorb ultraviolet light, a slightabsorption of light.

The piece of glass optical properties are superior, not easy to draw flowers, high refractive index. Refractive index is higher, then the more thin lenses. But the glass is fragile, material stresses.

Resin lenses

Resin is a kind of from a variety of plants, especially conifers hydrocarbons (HCS)secretion of substances. Because of its special chemical structure and can make thelatex paint and adhesive agent used is to be valued by. It is a mixture of high molecular compounds, so have different melting point. The resin can be divided into natural resin and synthetic resin two. The kind of resin is very much, light industry and heavy industry are widely used in people's daily life, in which often can see, such asplastic, resin lenses, paint etc.. Resin lens is used as raw material of synthetic resinchemical processing after the grinding lenses.