Lens in film and television has two fingers. One refers to the optical components used by film cameras and projectors to generate images, and the other refers to a continuous picture taken from Startup to shutdown, or the segment between two splicing points, which is also called a lens.

"One finger" and "two finger" are two completely different concepts. In order to distinguish them, one refers to optical lens and the other refers to lens picture. According to the origin of lenses, they are mainly Japanese lens and German lens. The Japanese lens mainly has good color restoration, while the German lens has a strong sense of hierarchy. In the market, China's lens has gradually occupied a certain market, mainly because the price is relatively low.

Huicheng vacuum optical coating machine is applied to lens, lens, vehicle, digital camera, smart phone, projector, filter and other industries. It is specially designed for the production of optical film products with few layers but high production capacity and high efficiency. The antireflection film can reduce the surface reflected light of lens and increase the transmission light. When there are many lenses, they must be low reflection. In addition to multilayer films, double-layer films with specific wavelengths are also used on MgF2 monolayer and laser head, which can be coated on plastic products at low temperature.