Short pass interference coatings
ITO conductive coatings
Glass, polymer and hybrid filters
Tested and certified to relevant standards
Three main coating types are commonly used on NVG filters. Consolite can offer all the following:
- Short pass interference coatings provide a means of selectively reflecting unwanted wavelengths and so can form the basis of a high transmission NVG compatible filter. They can also be used in combination with absorption filter types to enhance performance by “sharpening up” cut off wavelengths or by increasing blocking levels.
- Anti-reflection (AR) coatings do exactly what the name says. They use thin film coating technology to reduce unwanted reflections from filter surfaces. The advantages are two-fold – displays and other devices are more visible because reflections are removed, especially in daylight, and transmission is enhanced so filtered displays are brighter. Coatings can be supplied on glass filters to comply with standards such as MIL-C-675 and MIL-C-14806. AR coatings are also available on many of our polymeric filter materials, or we can also supply these with a textured anti-glare finish.
- Electrically conductive coatings, usually achieved with indium tin oxide (ITO) technology, are commonly used to enhance electromagnetic compatibility (EMC) for displays and other instruments where the display front would represent a break in the “Faraday cage” effect. Coating performance is expressed in “ohms per square” and we can offer a range of levels. We can also add metallised bus bars to permit electrical connection to the instrument frame. A similar effect can be achieved by laminating a fine metal mesh between two layers of filter material.
Please contact us for further information.