Optical coating materials used in optical coating machines
The origin of optical coating: Because in the optical industry, the total reflectance requirement needs to be more than 99%, most of the metal reflectivity is relatively high, and the metal materials such as copper, silicon, molybdenum and niobium are made by ordinary coating. Mirrors can only achieve 80% to 98% emissivity, but far from meeting the demand, optical coating method is the process to solve this problem.
The optical coater is a tool for plating optical films and provides an optical system. In many optical systems, the higher the optical system, the more colors the reflected light will be. The difference in the thickness of the coating between different sets of lenses will be used to eliminate the reflected light at different frequencies. is very important.
The optical coating materials used in optical coating machines generally have the following categories:
1. High-purity silicon particles and silicon powder: high purity, good quality and excellent performance.
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Specifications: high purity 99.99%; reagent grade 99.96%; common grade 99.93%;
Particle size: 0-120 mesh, 120-200 mesh, 200-325 mesh, -325 mesh.
2. Zinc Sulfide: Zinc sulfide itself is corrosive and will irritate the skin. Therefore, the production workshop should be well ventilated.
Nature: This product has two crystal forms. Zinc-type zinc sulfide is a colorless hexagonal crystalline powder or a white to off-white or light yellow powder. The relative density is 4.087. Melting point 1700 ° C. Thermal conductivity 25.1 w / (m? K), thermal expansion coefficient (volume): 100 ° C, 0.163; 200 ° C, 0.395; 400 ° C, 0.919; 800 ° C, 2.146;
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Zinc-type zinc sulfide is a cubic crystal. White to off-white or yellow powder. The relative density is 4.102 and the melting point is l700 °C. Coefficient of thermal expansion (volume): 100 ° C, 0.156; 200 ° C, 0.386; 400 ° C, 0.898; 800 ° C, 1.996. It can be slowly oxidized to sulfate in air. The crystal form transition temperature is 1020 °C. Soluble in dilute mineral acids. Insoluble in water.
Third, cerium oxide HfO2: purity: 99.9%, grade: spectral pure SP, specifications: granular and powder particle size custom, can be prepared targets.
4. Magnesium fluoride MGF2: colorless tetragonal crystal or powder. Soluble in nitric acid, slightly soluble in dilute acid, difficult to dissolve in water and alcohol. Uses: manufacturing ceramics. Glass and smelting magnesium, aluminum metal flux, coatings and soldering agents for lenses and filters in optical instruments.
Five, more:
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1. Oxide: silicon monoxide, silicon dioxide, hafnium oxide, zirconium dioxide, titanium dioxide, titanium oxide, trititanium pentoxide, antimony pentoxide, antimony pentoxide, aluminum oxide, trioxide Diterpenoids, indium trioxide, cerium oxide, tungsten trioxide, magnesium oxide, copper oxide, iron oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide, oxidation High-purity oxides such as cerium, cerium oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide, vanadium oxide, nickel oxide, zinc oxide, iron oxide, chromium oxide, cerium oxide, and copper oxide.
2. Fluoride: barium fluoride, barium fluoride, potassium fluoride, barium fluoride, sodium fluoride, barium fluoride, lead fluoride, aluminum fluoride, barium fluoride, magnesium fluoride, barium fluoride, fluorine High-purity fluorides such as antimony, barium fluoride, barium fluoride, barium fluoride, fluoride, barium fluoride, barium fluoride, barium fluoride, barium fluoride, barium fluoride.
3. Metals: aluminum, copper, chromium, cobalt, gold, silver, platinum, rhodium, tungsten, molybdenum, silicon, germanium, manganese, magnesium, antimony, tin, zinc, vanadium, iron, titanium, zirconium, hafnium, nickel ,钽,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Aluminum silicon, nickel vanadium and other alloys, high purity metal.
4. Sulfide: copper sulfide, cadmium sulfide, zinc sulfide, molybdenum sulfide, tin sulfide and other sulfides.
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5. Carbide: Zirconium carbide, tantalum carbide, silicon carbide, boron carbide, tungsten carbide, titanium carbide and other carbides.
6. Nitride: other nitrides such as titanium nitride, aluminum nitride, silicon nitride, and boron nitride.
7. Other compounds: zirconium diboride, titanium diboride, barium diboride, barium titanate, barium titanate, barium titanate, barium titanate, molybdenum disilide, and the like.
Related equipment: vacuum coating machine, vacuum coating equipment, electroplating equipment