Precision Optical Coatings
Antireflection Coatings reduce the reflections present the interface between an optic and the air or other background medium. These can be single wavelength coatings for lasers or complex broad or multband coatings. Light Coatings can produce coatings from UV - FIR wavelengths.
A metallic mirror can be a 1st or 2nd surface coating of metal, typically Aluminium, SIlver or Gold to a produce a wide angle, high reflectivity surface. These coatings can be complemented with optical layers to improve reflectivity in select wavelengths or with layers to protect the metal from oxidation, abrasion and chemical degredation.
A beam splitter coating is used to split the incident light into 2 different paths, either for rejection purposes or the split a signal. These coating types typically work by;
- Splitting the wavelengths of incident light
- Splitting the light based on polarisation
- Splitting the intensity with a partial mirror
A dielectric mirror is a stack of high and low index optical materials which provide a very high reflection level. These coatings are generally give the highest reflectivity (>99.9% possible) but can be very thick and time consuming to produce compared to a metal mirror.
Edge filters are typically versions of a high/low index stack and combined antireflection optimisations to provide a sharp transition from high reflection to high transmission. These can be in the form of long or short pass filters or other iterations to selectively filter incident light.
Custom Optical Coatings
Light Coatings regularly undertake custom coatings including transparent conductive oxides such as ITO, speciliased functional coatings such a thermochromics as well as a range of other optoelectronic coatings.