What is Optical coating?

Optical coating is a technique of depositing a thin film on the surface of a material with the purpose of altering the reflection and transmission characteristics of the material's surface. Common materials used in optical coatings include metals, oxides, sulfides, and fluorocarbons, among others. The fundamental principle of coating relies on the phenomenon of optical interference. By controlling the thickness of the coating material, different interference effects for various wavelengths of light can be achieved, thereby altering the transmission and reflection properties of light. Common optical coating technologies include vacuum evaporation, sputtering, and ion plating, among different techniques.

MLOptic's Coating Technologies

MLOptic offers a variety of coating technologies: low-stress coating, laser coating, DUV (Deep Ultraviolet) coating, hydrophobic coating, and conductive films. The diversification of coating technologies leads to a variety of application fields and innovations.

· The primary purpose of low-stress coating is to achieve high surface accuracy coated products, such as dielectric mirrors, filters, and the like.

· Laser coating typically refers to the application in laser systems, requiring optical components with high reflectivity and throughput.

· DUV coatings mainly include AR (Anti-Reflection) / HR (High-Reflection) coatings for wavelengths of 193nm and 266nm, as well as AR/HR coatings for 355nm lasers. 

· The principle of hydrophobic coatings is based on wettability theory, with surfaces that are hydrophobic, repelling water molecules while allowing gas to pass through. Hydrophobic coatings have low surface energy, a large static water contact angle, and are characterized by waterproof, fog-proof, snow-proof, anti-pollution, anti-adhesion, anti-oxidation, anti-corrosion, self-cleaning, and prevention of current conduction.

· Conductive films are thin films with conductive functions, also possessing the capability to transmit visible light.

Application Fields

Optical coatings are widely used in various fields such as optical components, optical instruments, electronic devices, solar cells, and display technologies. For example, they are applied in eyeglass lenses, photographic and video lenses, laser optical components, and microscope optical systems.