Tell us what Fresnel lenses are made of

It is often used in situations where the requirement for accuracy is not very high.Mostly around 1mm, Fresnel lenses are in many cases equivalent to convex lenses of infrared and visible light.Its texture is designed using the dry interference of light and according to the requirements of relative sensitivity and receiving Angle, Fresnel lenses are mostly thin sheets made of polyolefin material.

Fresnel lens optical lens surface side is smooth, the other side made from small to large concentric circles, such as slide projector, film magnifying glass, infrared detector, etc., is very tall to the requirement of lens, a lens of high quality must be the surface bright and clean, texture clear, its thickness varies with the purpose, but few people know what he is made of, and features for the larger area, the thickness of the thin and long detection distance, the following to you explain what Fresnel lens made of, effect is good, but this is much lower than normal convex lens, a lot of people know that the Fresnel lens, are made of glass.