Anti-Reflection Coatings

Special Properties

• Low surface reflection
• High transmission in the visible wavelength area
• Suppresses double reflection, ghost images, and phantom light- or doubled laser beams
• Refractive index of the coating matches to
  air-glass transition
• Broadband-multi-layer thin-film coating design
• Small light absorption
• High abrasion resistance and adhesive strength

Typical Applications

• Anti-reflection-coating for optics
• Sensor windows
• Laser windows
• Coating for optical measuring devices
• Automotive cockpit windows
• Windows used for camera housings
• Robotics applications
• Reflex free sight glasses
• AR-coating for lenses and lens assemblies

 

Request for Quotation

Also available in 48 h Express-Service

Our ARC anti-reflection coating is used whenever reflections from glass surfaces must be eliminated. The coatings offer a high optical light transmission and an excellent antireflection effect in the visible wavelength range. We achieve this by the use of an optical multi-layer coating adapting the refractive index of the glass substrate to the refractive index of the air. The result is that only a small part of the incident light is reflected. While an uncoated glass surface causes a reflection of about 8,5% in the visible wavelength spectrum, our anti-reflection coating layers can reduce these reflections in parts of this spectral light region to less than 0,2% per glass surface. Compared to a conventional single-layer anti-reflection layer with approx. 1-2% still reflected light this is a noticeable improvement that can be perceived with the naked eye. Our ARC anti-reflective coatings effectively suppress unwanted secondary reflections which overlay transmitted images and make them appear blurred. In transmission, this preserves a sharper and brighter image with significantly better contrast and higher optical image quality. When used as a laser window, double laser beams are suppressed, and the AR-coating layers increase light transmission.

We apply the layers of the double side coated ARC materials and of the single-side coated ARC–1S anti-reflection coatings to selected float glass substrates with a high-grade surface quality. For the ARC-B materials, we use BOROFLOAT® substrates. The refractive index of each multi-layer anti-reflection coating matches to the respective glass-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 glass and optics by adapting the refractive index accordingly. A coating of glass lenses and other optics also is possible on a batch basis. Customized adaptation of coating layers for other operating wavelength ranges, infrared light or different refractive index is available 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 manufacture and deliver custom sized optics as fast as usually fixed dimensions can be delivered.

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

 

Request for Quotation

 

Specifications

Reflection curve of the ARC multi-layer coating compared to an uncoated glass surface in the visible wavelength area.

 

Substrate Material

• ARC and ARC-1S coatings: Selected float glass
• ARC-B coating: BOROFLOAT® borosilicate glass
• Other glass 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 any other suitable glass

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 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".