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Optical Windows

Flat windows made of optical glasses & high-quality flat glasses

We fabricate optical windows for a wide range of applications. For the manufacturing of this kind of optics we only process very pure optical glasses and specialty flat glasses, because the material quality is crucial to keep distortions low and to ensure an excellent optical imaging performance for each window. Besides, the material selection is critical if maximum light transmission and low absorption are essential requirements.

Below please find links to a selection of optical materials from which we mainly manufacture optical windows and optical flats:

 

Round optical windows, transmissive optics

 

 

Optical Windows:

 

N-BK7 windows

BK7 is the industry standard for optical quality windows for applications in the visible wavelength range. We make all types of precision optics for general use, such as windows, lenses, prisms, filters, optical flats, and laser optics from BK7. More...

 

Quartz Glass windows made of synthetic Fused-Silica

Our windows made of high purity synthetic optical Fused Silica offer an excellent transmission from the ultraviolet to the infrared. Already at a wavelength of 185 nm, more than 80% of light transmission is available, which allows using this material for UV-optics. Operating temperatures up to 1000 °C are possible with this optical grade quartz glass. All types of demanding high quality- and precision laser optics can be made of Fused Silica with these optical characteristics. More...

 

BOROFLOAT® windows

The high-quality borosilicate glass BOROFLOAT® has a temperature resistance of up to 500 °C. It provides good optical quality, low absorption, and an exceptionally high chemical resistance. The material is an ideal choice for industrial grade window optics up to the infrared range. More...

 

B 270® - Superwite windows

B 270® is a clear crown glass with superb light transmission. The optical quality of the natural blank B 270® surfaces is only moderate according to optical standards. However, through an additional polishing process also demanding window optics, optical flats, other precision optics, and even laser optics can be produced from B 270®. More...

 

Windows made of selected float glass

Our selected float glass is cost-effective and has excellent quality and flatness. It offers high optical transmissivity for visible light. The material is an ideal choice for applications with increased optical requirements compared to conventional glasses such as substrates for mirrors or anti-reflection-coatings. More...

 

 

Thin- and Ultra Thin Optical Windows:

 

Windows made of D 263 T

D 263 T is a perfect material for thin and ultra-thin windows. It is available at a large variety of standard thicknesses. Even at low thickness D 263 T has a remarkable flatness* and low warpage. Rectangular shapes can be manufactured from D 263 T beginning at a thickness of only 50 µm and above. Round and free window shapes are possible beginning at 0,1 up to 1,1 mm thickness. More...

 

Windows made of 1737F

1737F is an alkali-free boro-aluminum silicate material with a low microroughness suitable for COG (chip-on-glass) processes. It features an excellent flatness* and surface quality. More...

 

Windows made of EAGLE2000

EAGLE2000 is lightweight and belongs to the alkali-free glasses. It offers display quality and can even be used for more demanding optical window applications. EAGLE2000 is color neutral and can withstand elevated temperatures. More...

 

Windows made of MEMpax®

MEMpax® is a high-quality borosilicate thin glass with almost the same thermal expansion as BOROFLOAT®. It has a better surface quality, and planarity* than most mechanical polishing processes can achieve at such small thicknesses. It features a remarkable good transmission from the UV to infrared range. More...

 

Windows made of AF 32® eco

The new thin alkali-free AF 32® eco glasses are often used in micro-optic and optoelectronic applications. They can withstand temperatures up to 600 °C and feature a consistent optical transmission and an outstanding surface quality. More...

 

Windows made of AS 87 eco

AS 87 eco is an ultra-thin aluminosilicate glass which offers a high transmission beginning at UVC-wavelengths and which is flexible within certain limits and suitable for the production of thin windows for optoelectronics. The material features good optical quality and a low micro-roughness. More...

 

*Note: The optical flatness of thin and ultra-thin windows is limited for physical reasons. Please take into account that the planarity in the case of thin glasses depends directly on the thickness since, with low material thicknesses, the inherent mass already influences the flatness. Optical flatnesses as are possible with window optics based on thicker glasses cannot be achieved with thin glass. However, windows made from the aforementioned thin materials in most cases represent the best possible choice for the best possible planarity at such low thicknesses.

 

 

Coated Windows:

 

ITO-coated optical windows

Our ITO-coated glass windows have a thin optically transparent and electrically conductive indium-tin oxide coating on one or both surfaces. We continuously produce a large variety of resistances based on various exotic substrate glasses. More...

 

Multilayer-broadband-anti-reflection coated windows

Antireflection-coated optical windows prevent reflections from the surfaces of substrate glasses. They are used to eliminate ghost images, phantom laser beams or to reduce the optical attenuation and to increase light transmission of an optical window. More...

 

Custom Optical Windows:

We manufacture flat optical windows in almost any form from virtually any kind of available materials on request. Each optical window can be polished for a particular flatness or other optical parameters. Custom coatings, for example, an antireflection coating for a specific wavelength or optical coatings for laser applications per production run are also part of our capabilities.

 

 

None of the optical windows listed here is suitable for your application?

If you cannot find the flat optical window, you are looking for please send us your inquiry by e-mail, use our inquiry form, send us a fax, or give us a call. We manufacture optical windows made of numerous other glasses which are possibly not listed in this overview.