Optical Coating
Optical Coating
Optical coating typically consist of thin films made up of single or multiple layers of either metallic or dielectric materials. When properly designed and fabricated, the coating can dramatically modify the reflection and transmission properties of an optical component. The properties can be controlled from the deep UV to the IR with narrowband, broadband, or multi-band response, and can be polarization sensitive.
Optical coating can be applied directly to the surface of an optical component to tailor its reflectivity, as in the case of an optical mirror or beamsplitter. For other components, such as lenses, the applied coating may simply improve their overall transmission properties by reducing surface reflectivity. When optical coating are integrated into a monolithic component for the express purpose of controlling the spectral transmission of light, the component is referred to as an optical filter.
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Process of Optical Coating
The individual layers that make up optical coating are typically a few tens of nanometers to a few hundred nanometers in thickness, while a single optical coating can be comprised of several hundred layers. Consequently, the techniques used to deposit these layers require a high degree of precision. Generally, the process begins with surface fabrication to minimize surface roughness and sub-surface damage. It continues with surface cleaning and preparation and is followed by deposition of high-performance thin film designs. The deposition technologies include thermal evaporation, electron-beam, ion-assisted deposition, and advanced plasma deposition.
Types of Optical Coating
RZ Optics Co., Ltd. focus on providing high-quality Antireflection Coating and Reflective Coating and other optical coatings as required, including single-layer magnesium fluoride antireflection coating, broadband antireflection coating, single wavelength antireflection coating, dual-band antireflection coating, high reflective dielectric coating, metal coating and enhanced metal coating.
