In this colorful world we are living in, one needs to properly see how everything looks like. One can only fully appreciate the beauty of this world if you can accurately see your surroundings.
However, there are times when one cannot achieve the desired effect due to a variety of factors. Among these factors, the most renowned of them all is reflection.
Technically speaking, a reflection is produced when light, instead of passing through two mediums with different refractive indexes, bounces of instead. The result? Lesser light making its way through the medium, hence, lesser visual acuity and image contrast.
However, thanks to the latest technology that ECI uses, one can already address this problem with the help of optical coatings.
What is an optical coating?
- One or more thin layers of material that are deposited on any optical component available, like a mirror or a lens
- It alters the way that optical component reflects and transmits the light passing through it
Types of optical coatings available in the market
- Metal coating
- Simplest optical coating available in the market
- Makes use of thin layers of metals (aluminium, silver, or gold)
- Metal used is deposited on to the glass substrate in a process called silvering
- The reflective properties of the mirror depends on the metal used
- Dielectric coating
- Application of materials with different refractive indexes to the substrate
- Materials commonly used: magnesium fluoride, calcium fluoride, and other metal oxides
- Commonly used method in producing scientific optical instruments (microscopes, telescopes, interferometers) and consumer devices (binoculars, spectacles, lenses)
- Antireflection (AR) coating
- Reduces the reflection given off from surfaces, hence, reducing reflection
- High-reflection coating
- Works the opposite of AR coating
- Makes use of high-index (zinc sulfide, titanium dioxide) and low-index (magnesium fluoride, silicon dioxide) to enhance reflectivity through a band-stop.
- Extreme ultraviolet (EUV) coating
- Makes use of multilayer layers of mirrors made of high-mass metals (molybdenum, tungsten) and a low-mass spacer (silicon, vacuum) to be deposited on a substrate
- Transparent conductive coating
- Used where coatings should conduct electricity or produce static charge
For more information on this, ask the optical engineer of your trustworthy optical company.