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Anti-Reflection Coatings

Broadband anti-reflection (AR-) coated glass, ARC-Series

Special Properties

  • Very low residual reflection
  • High transmittance in the visible range
  • Low absorption
  • Color neutral in transmission
  • Broad-band multilayer coatings
  • Significant reduction of light loss
  • Abrasion resistant to MIL-M-13508 C
  • Adherence to MIL-C-675 C

Typical Applications

  • Anti-reflection coated optical windows
  • Laser scanner devices
  • Contrast enhancement
  • Display covers
  • Optics for sensor technology
  • Vision systems
  • Non-reflective camera windows and lens systems
  • Holography applications
  • Automotive cockpit window
  • AR-coating for photography optics
  • Optical laser window
  • Camera lens optics

Suppression of reflections by the help of physics

Our anti-reflection coatings consist of alternating thin-film-coated layers, each with a different refractive index. The thickness and the refractive index of each layer is chosen, to generate a self-extinguishing interference for the light reflected by the surface and to cause constructive interference in the associated transmitted light beam for a defined wavelength range. The highly efficient broadband-multilayer thin films of our ARC are adapted to the refractive index of air. They can drastically reduce the reflections, which for physical reasons occur on uncoated or blank glass surfaces. At the same time they greatly increase the transmissivity of a window or a lens, because most of the light which is normally reflected, is available in transmission.

 

Eliminating ghosting & increasing light transmission

The reflective surface of a blank, transparent glass causes secondary reflections that are superimposed on a transmitted image. This usually is the cause for ghost imaging. This undesirable effect of residual reflection is almost completely eliminated by our anti-reflection coating. The natural reflectivity of a normal glass sums up to about 4,25 % per side. This amount of reflected light can even be reduced to below 0,2 % in partial ranges of the visible wavelength spectrum by our standard ARC-layers. Compared to ordinary single-layer AR-coatings which have residual reflections of for example 2 % per surface, this is a technically remarkable and visible improvement for the eye.

 

AR-coatings are omnipresent

Anti-reflection coatings are often used in everyday life applications like eye-glasses, magnifying lenses, camera lenses, optical lenses, quality displays, automotive cockpit windows etc to reduce glare effects. However, the type of AR-coatings used for such applications usually doesn't provide the high effectiveness and high quality of our ARC coating design. All our ARC-materials are using premium-quality substrates and their primarily use is for technical optics applications in the visible wavelength spectrum.

 

AR-coatings from stock or custom-made

Our ARC anti-reflective coatings are vacuum deposited on flat, premium grade white float material. Our ARC-B series is based on high quality BOROFLOAT® substrates. The AR-thin-film layers are matched to the index of refraction of the respective material and to the one of air. Both ARC materials are always in stock at several thicknesses, since we coat them on a regular basis. However, we are not restricted to these substrate materials and also a custom substrate thickness is possible if the quantity is large enough to fill one coating run. The ARC-coatings can be applied to virtually any suitable material and they can be adapted to the corresponding refractive index of the substrate material used, to create the best possible solution. Of course, our ARC multi-layer coatings can be applied to lenses too and all of our anti-reflection coatings can be optimized for other wavelength ranges, a different index of refraction, specific laser lines, even lower rest reflections or for an even higher light transmittance. Please use our inquiry form to request a quote for a customized anti-reflection coating or for pricing to get your lenses AR-coated. Our standard ARC anti-reflection coated materials are available from stock. Same applies to our our single-side anti-reflective coating called ARC–1S, which is based on the same high quality substrate as the double side coated ARC.

 

How can I order stock sizes?

You might be wondering why we do not have a shop system on our website. For this, there is a simple reason. We are not dependent on a few stock dimensions. We specialized to manufacture and supply customized dimensions as fast as commonly catalog items can ship. In order to quickly get a quotation for individually sized ARC, ARC-B or ARC-1S anti-reflection coatings, please push the button below or follow the link to the listed thickness in the technical data area of this page to be redirected to our inquiry page.

 

Request for Quotation

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48-h Express Optics Service available

 

 

Note: We often get inquiries to coat eye-glasses with anti-reflective layers for better vision quality. We do not coat eye-glasses or glass parts like ophthalmic lenses at all. We only make technical grade coatings for optical windows, lenses and substrates for optical applications. Also, it is not practicable to coat a single lens or a single piece of material. The deposition of lenses and any kind of custom coating are only possible if case the production quantities are large enough for at least one small production run. Please use our information request page form to inquire information about whether your lens quantity or customized coating quantity will qualify for using a customized deposition run.

Specifications

 

View on the rest reflection curve of ARC anti-reflection coating for visble light

View rest-reflection of the ARC-anti-reflection coating

 

Product Codes

  • ARC (double side BBAR-coated, index matched
    to selected float)
    (BBAR = Broad-band AR-coating)
  • ARC-1S (single side BBAR-coated, index matched to
    selected float)
  • ARC-B (double side AR-coated, index matched to BOROFLOAT® material)

Substrate Materials

Coating Construction

  • ARC: Double side multi-layer coated
  • ARC-1S: Single side multi-layer coated
  • ARC-B: Double side multi-layer coated
  • Modified anti-reflection coating design as well as single layer coating design per enquiry

Spectral Characteristics

  • Absolute reflections Rabs </= 0,6 % at wavelength
    range 450-650 nm (i=0°) for unpolarized light
    (reflected light per surface, matched to air)
  • Average reflections Ravg < 0,3 % at wavelength
    range 430-660nm (i=0-15°) for unpolarized light
    (reflected light per surface, matched to air)
  • Coatings for other wavelengths per inquiry

Flatness

Surface Quality

  • typ. 80-50 scratch & dig (MIL-0-13830A)
  • Other on request

Standard Thicknesses

(click on desired thickness for a quote)

Other Specifications

  • Adhesion according to MIL-C-675 C
  • Abrasion resistance according to MIL-M-13508 C

 

All given details and specifications are mean reference values and are not guaranteed. In addition, please consider our "Notes on specifications"