Evaporation Materials MgF2 Granule, Optical Coating Use MgF2 99.99%

Evaporation Materials MgF2 Granule, Optical Coating Use MgF2 99.99%

MF : MgF2
MW: 62.3
CAS: 7783-40-6
EINECS: 231-995-1

Size: 0.5-1mm, 1-2mm, 1-2.5mm, 1-3mm, 2-3mm, 3-4mm, 3-5mm, 4-8mm

Colorless transparent crystal

Magnesium fluoride film, also known as magnesium fluoride, has tetragonal crystal structure, melting point of 1255 ℃, thermal conductivity of 0.3w/m · K, refractive index of 1.38, extinction coefficient of 0.

Amorphous magnesium fluoride films can be prepared by vacuum evaporation or sputtering deposition

Magnesium fluoride optical coating material is an important raw material in the field of optical applications. As an antireflective coating for optical devices, it is widely used in lens imaging optical system, laser element and window to improve the performance of antireflection, reflection, light splitting and filtering. It is not only widely used in optics, optical instruments, optical fiber communication, laser technology, integrated optics, cold light source and other high-tech fields, but also has been used in photochromic pigments, automobiles, communication equipment, toys, handicrafts and other industries. The photochromic anti-counterfeiting ink prepared with magnesium fluoride coating material as the main raw material has been included in the currencies of more than 60 countries such as US dollar, RMB, etc Anti counterfeiting trademark.

Single layer MgF 2 film can be used as antireflection coating on the surface of optical glass. Because its refractive index is lower than that of optical glass (1.52), the reflection of incident light at the upper and lower interfaces of the film has the same phase change. Therefore, if the reflection wavelength of the incident light is equal to one fourth of the optical thickness of the incident light, then the reflection wavelength of the incident light is equal to one fourth of the incident light. For example, if a single layer of MgF 2 is coated on the glass with refractive index of 1.52, the reflectivity of the central wavelength decreases from 4.2% to 1.3%, and the reflectivity is 2% smaller in the visible light (450-760nm). After the coating treatment of glass, will show a light blue and purple color, a typical camera or telescope lens, the usual coating treatment is magnesium fluoride (MgF2), the refractive index of magnesium fluoride is 1.38, which is far lower than that of ordinary glass, and even lower than that of sapphire glass (refractive index of ordinary glass is 1.52, that of sapphire is 1.76) The higher the light, the stronger the reflection. Therefore, the effect of sapphire coated glass will be better. Among the available optical thin film materials, the refractive index of magnesium fluoride (MgF2) is about the smallest, which is only 1.38. Using magnesium fluoride coating can reduce the light reflectivity from 4% to 1.8%, which also increases the transmission ratio. Of course, in order to improve the transmittance, multilayer coating can also be used to enhance the transmittance, that is, both inside and outside the glass are coated. A kind of

Application:

Optical lens coating. The coating of magnesium fluoride film on optical equipment can reduce the reflection of the lens interface to the incoming light, reduce the halo, and improve the imaging quality (film interference). In addition, magnesium fluoride is also used in ceramic and electronic industry, manufacturing ceramics and glass, flux for magnesium metal metallurgy, fluorescent material for cathode ray screen, flux, etc