Expanding the application field of optical coating, rare metals add color to life

With the continuous promotion of coating technology, the application fields of optical coating technology are also constantly expanding. The vast majority of optical coating materials used in different fields are rare metals with very small reserves. These rare metals and rare earths are used in small quantities in the industrial field, but they are indispensable and are known as“ Industrial vitamins;.

In the application of optical coating materials, coating targets are the core technology. Different optical coating materials are formed by the different rare metals contained in different targets. Commonly used rare metals include yttrium fluoride, praseodymium fluoride, germanium, zinc sulfide, magnesium fluoride, titanium dioxide, zirconium oxide, cobalt, gallium, selenium and other metals. Copper, molybdenum, silicon, germanium and other metals are commonly used in optical materials for mirrors, and germanium, gallium arsenide, zinc selenide and other metals are widely used in output and transmission optical components.

Coating is the process of physically or chemically depositing a transparent electrolyte film or a metal film on the surface of a material, with the aim of altering its reflective and transmissive properties. Optical coating is a fundamental technology in the field of optics that cannot be ignored, based on the principle of optical interference, to achieve a reflectivity between 78-98% in the visible and infrared wavelength ranges, in order to achieve transparency.

In our daily lives, optical coatings can be seen everywhere, such as glasses, digital cameras, various household appliances, anti-counterfeiting technology on banknotes, various equipment in the medical field, weapons in the military field, and so on. The most common way is to read characters on a mobile phone screen under sunlight. Due to the weak reflection of light, the screen becomes blurry, which requires an optical coating on the screen to achieve clear transmission.

Rare metals, as important materials for optical coating applications, have penetrated into high-end technology fields, especially playing an important and irreplaceable role in national defense, aerospace, precision instrument manufacturing, and the electronics industry. At present, 14 rare metals and rare earths including germanium, gallium, selenium, cobalt, etc. have been listed on the Pan Asian Nonferrous Metals Exchange and Xiamen Commodity Exchange. Through the unique warehouse receipt pledge financing business of Panrong Network, ordinary investors can directly participate in the investment of rare metals, combining industrial capital and financial capital, allowing industrial enterprises and individual investors to share the benefits of resource appreciation.