Optical coating and coating of lenses and prisms

Maximum optical performance thanks to optical coating of lenses and prisms

Meets light to a Glass-air surface e.g. with a Roof prismThe main difference between the roof edge and the Porro system is the roof edge, where one of the reflective surfaces resembles a house roof (see picture below). " More info), the reflection causes a loss of light. This results in a loss of image brightness, contrast and colour brilliance.

Through a CoatingIf light hits a glass-air surface (e.g. with a roof prism), the reflection causes a loss of light. " More info the area of LensesThe use of aspherical lenses leads to a reduction in the overall length of the binoculars and in some cases to a significant reduction in weight. " More info and PrismsLenses have the property of imaging objects upside down and laterally inverted - therefore the image must be rotated again. " More info In the case of binoculars or riflescopes with a thin layer of metal salts, this reflection can be limited.

Thanks to a Multilayer coating can today more than 90 per cent Light transmissionLight transmission is the ability of optical glass or optical systems to "let through" as many light rays as possible. " More info, highest contrast rendition and colour fidelity can be achieved across the entire light spectrum.

The uncoated surface of a lens or prism reflects approx. 10% of the incident light, the other 90% of the light passes through this surface. The standard coating of a glass surface with magnesium fluoride (MgF2) (full remuneration = FC - Fully Coated) already reduces the reflected light to approx. 4%.

The still further Perfected multi-coating (MultiWith the help of a simple coating, this loss of light transmission (transmission loss) is reduced to 1.5%, for example. This already increases the amount of light that reaches your eyes to around 80%. " More info remuneration) enables a Light transmission of over 99% in some cases. The multi-coating consists of 7 to 15 individual layers of a special substrate, which is applied to the surface in a complex process. Glasses of the lenses and prisms vapour-deposited becomes.

Coating process - depth of application

• Full remuneration (FC - Fully Coated): simple coating on all lens surfaces
• Multiple remuneration (MC - Fully Coated): Multiple coating on at least one outer lens surface
• Full multiple remuneration (FMC - Fully Multi Coated): Multiple coating on all lens surfaces