Anti-Reflection Coatings

Special Properties

• Low surface reflection
• High visible transmission
• No double reflections, ghost images, phantom light, or doubled laser beams
• Refractive index matched to air/substrate transition
• Multi-layer broadband thin-film coating design
• Small light absorption
• High abrasion-resistance and adhesive strength

Typical Applications

• Anti-reflection coatings for optics
• Sensor covers
• Laser windows
• Coatings for optical measuring devices
• Automotive cockpits
• Camera front glasses
• Robotics applications
• Non-reflective windows
• AR-coating for lenses and lens assemblies

 

Request for Quotation

Also available in 48 h Express-Service

Anti-reflection coatings are used whenever reflections from glass surfaces must be minimized. Our ARC-coatings offer a high optical light transmission and an excellent antireflection effect in the visible wavelength range. We achieve this by vacuum-deposition of a dielectric multi-layer coating that adapts the refractive index of the substrate to the refractive index of the air. As a result, very little incident light is reflected by the surface of the substrate.

While a glass without anti-reflection coating has a reflection of typically 8,5% in the visible wavelength spectrum, our ARC-coating layers can reduce these reflections in parts of this spectral light region to less than 0,2% per surface. Compared to a conventional single-layer anti-reflection coating which still reflects about 1-2% of light this is a noticeable improvement that can be perceived with the naked eye.

In addition, our ARC anti-reflective coatings effectively suppress unwanted secondary reflections. These typically occur with uncoated glass, superimposing the transmitted image and making it appear blurred. By using our ARC coating, the image remains sharper and brighter and has a significantly better contrast, so that overall a high optical image quality is maintained. When used as a laser window, double laser beams are suppressed and the ARC-coating increase the usable laser power because most of the light is available in transmission and nearly none is reflected.

We vacuum deposit the layers of the double side coated ARC materials and of the single-side coated ARC–1S anti-reflection coatings on selected float with a high-grade surface quality. For the ARC-B materials, we use a BOROFLOAT® substrate. We match the refractive index of each anti-reflection coating to the respective substrate/air transition.

Both ARC coating-series are always available from stock as we produce them regularly. However, we do not restrict ourselves to the coatings, layers, and materials described above but can also apply anti-reflective coatings to other types of glasses and optics by adapting the refractive index accordingly. An ARC-anti-reflection coating can also be applied to lenses and other optics on a batch basis. A customized coating design for other operating wavelength ranges, infrared light or different refractive index is possible on request.

 

How do I get a quotation? Are there fixed sizes?

We are not limited to a few standard dimensions! Our company specializes in the rapid production and delivery of optics with individual dimensions. We quote, manufacture, and deliver custom sized optics as fast as usually fixed dimensions can be delivered.

To get a quotation for one of our existing ARC anti-reflective coatings on glass with individual dimensions, please use the following button:

 

Request for Quotation

 

Specifications & Properties

Reflection curve of the ARC multi-layer coating compared to a surface without coating in the visible wavelength area.

 

Substrate Materials

• ARC and ARC-1S coatings: Selected float glass
• ARC-B coating: BOROFLOAT®
• Other substrate material or custom coatings for
  lenses per request

Coating Construction

• ARC and ARC-B coatings:
  Double side index-matched multi-layer coating
• ARC-1S coating:
  Single side index-matched multi-layer coating
• The refractive index of the coatings can be matched to substrate material

Spectral Characteristics

• Rabs </= 0,6% per single surface at wavelength range 450-650 nm (i = 0°), unpolarized light
• Ravg < 0,3% per single surface at wavelength range
  430-660 nm (i = 0-15°), unpolarized light
• Coating for other wavelength ranges per inquiry
• Characteristics for laser use per inquiry

Flatness

• Depending on the substrate and thickness used
• Other on request

Surface Quality

• better than 80-50 scratch & dig (MIL-0-13830A)
  (typically better than 60-40)
• Higher surface quality on request

Standard Thickness

(click on the desired material thickness to open an inquiry)

• ARC: 1,10 mm / 2,00 mm / 3,00 mm thickness
• ARC-1S: 2,00 mm thickness
• ARC-B: 1,10 mm / 2,00 mm / 3,30 mm thickness
• Other thicknesses possible per inquiry

Other Specifications

• Coating layer adhesion according to MIL-C-675 C
• Abrasion resistance according to MIL-M-13508 C

In case you want to get a batch of optical lenses anti-reflection coated, please let us know the exact specifications of the lenses you are supplying. It is essential to specify the refraction index of the lens material as well as the exact lens dimensions and focal length. The lenses to be coated must not already have a coating layer. Please specify the maximum allowed amount of light that still might be reflected (residual reflection) by the lens surface, the relevant wavelength area, and the light source used.

 

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

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