Take you to understand optical coating

Optical film refers to the preparation or coating of one or more layers of dielectric film or metal film or a combination of these two types of films on optical components or independent substrates to change the transmission characteristics of light waves, including light transmission, Reflection, absorption, scattering, polarization and phase change. Therefore, through appropriate design, the transmittance and reflectivity of the surface of the element in different wavelength bands can be adjusted, and the light of different polarization planes can also have different characteristics.

With the development of science and technology and economic globalization, today's human beings have entered the knowledge economy society and the information society. And with the development of "Made in China", optical manufacturing is in the ascendant on the mainland of China, and it is developing rapidly. Chinese optical manufacturing has begun to have an important position on the international economic stage.

Optical films are one or more layers of films that are coated on the surface of optical parts by changing the surface characteristics of optical parts. It can be a metal film, a dielectric film, or a combination of these two types of films. Optical film is an indispensable part of various advanced optoelectronic technologies. It can not only improve system performance, but also a necessary means to meet design goals. The application field of optical film involves all aspects of optical systems, including laser systems, optical communications, Optical display, optical storage, etc., the main optical thin film devices include reflective films, anti-reflection films, polarizing films, interference filters and beam splitters, etc. They have been widely used in the national economy and national defense construction, and have received increasing attention from scientific and technological workers.

Definition of Optical Film

It is composed of a thin layered medium, and a class of optical medium materials that propagate light beams through interfaces. The application of optical thin films began in the 1930s. Optical thin films have been widely used in the fields of optics and optoelectronics technology to manufacture various optical instruments. The preparation conditions are high and precise.

The definition of an optical film is: a dielectric film with a thin and uniform thickness attached to the surface of an optical device during the propagation path of light, and the reflection, transmission (refraction) and polarization characteristics when passing through the layered dielectric film, to It achieves the light of various special forms such as the total transmission of the light in one or more wavelength ranges, the total reflection of the light, or the polarization separation.

Optical films are ubiquitous in our lives, from precision and optical equipment, display equipment to optical film applications in daily life; for example, glasses, digital cameras, various household appliances, or anti-counterfeiting on banknotes technology, can be called an extension of the application of optical film technology. If there is no optical thin film technology as the basis for development, modern optoelectronics, communication or laser technology will not be able to make progress, which also shows the importance of the research and development of optical thin film technology.