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Optical Windows

Flat window optics made of high-quality glasses

Our company produces optical windows for industry, research, and science for more than 25 years. This type of optics has the task of transmitting light, lasers, or images in optical systems without degrading the incident light or image. The selection of the appropriate raw materials for optical windows is decisive for the achievable optical quality. To limit distortions, ensure excellent imaging performance, and achieve maximum transparency, we solely process high-purity optical glasses and high-quality specialty flat glasses to fabricate optical windows.

For every application, there is an optimum solution. A high-end material is not always necessary to accomplish relatively simple tasks. On the other hand, sophisticated applications often require a very high optical purity and quality. We are pleased to help you select the optimal, most economical solution for your optical application.

Below please find the links to a selection of materials from which we mainly manufacture optical windows and optical flats. It will help you to find an optimum solution for your project. Please follow these links to the datasheets of the materials for all technical details and optical specifications:

 

Round window optics

 

 

Optical Windows:

 

BK7 windows

N-BK7 is an industry-standard for optical-quality windows used for applications in the visible wavelength range. We fabricate all types of custom precision optics, such as windows, lenses, prisms, filters, optical flats, and laser optics from BK7. More...

 

Quartz windows made of synthetic Fused-Silica

Fused silica offers excellent purity and outstanding optical quality. This type of optical grade quartz glass offers excellent transmittance from the deep ultraviolet to the infrared. Many precision laser optics are based on Fused Silica. At a wavelength of 185 nm, more than 80% light transmission is already available, which allows using optical grade fused silica for deep UV-transmitting optics. Besides, an operating temperature of up to 1000 °C is possible. We also utilize this high-quality material for the production of our quartz microscope slides. More...

 

BOROFLOAT® windows

BOROFLOAT® borosilicate glass is temperature-resistant up to 500 °C. It provides excellent optical quality, low absorption, and exceptionally high chemical resistance. It is a perfect choice for industrial-grade window optics for visible to infrared wavelengths. It is also an economical substrate for mirror and filter optics. We have a wide range of thicknesses of BOROFLOAT® always available. More...

 

B 270® - Superwite windows

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

 

Windows made of selected float glass

Our cost-effective selected float glass provides excellent optical quality and flatness, much better than the one of conventional soda-lime glasses. It has high transmissivity for visible light and is ideal for applications with increased requirements, such as mirror substrates or anti-reflection-coatings. It is ideally suited for commercial-grade window applications. More...

 

 

Thin- and Ultra-Thin Optical Windows:

 

Windows made of D 263 T

D 263 T is a perfect choice for thin and ultra-thin windows. It is available at a large variety of standard thicknesses. D 263 T offers a remarkable flatness* and low warpage. We manufacture rectangular windows from D 263 T beginning at a thickness of only 50 µm. Round and free window shapes are possible, starting at 0,1 mm and ending at 1,1 mm. 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 excellent flatness* and surface quality. We often use 1737F to fabricate flat thin optical windows with increased requirements regarding smoothness and flatness at small thicknesses. More...

 

Windows made of EAGLE2000

EAGLE2000 is lightweight and alkali-free. It surpasses display quality and can even work in more demanding thin optical window applications. Furthermore, EAGLE2000 is color neutral and can withstand elevated temperatures. More...

 

Windows made of MEMpax®

MEMpax® is a precision borosilicate thin glass with almost the same thermal expansion as BOROFLOAT®. It has superior surfaces and planarity* than most mechanical polishing processes can achieve at such small thicknesses. It features an excellent transmission from the UV to the infrared range. We can fabricate ultra-thin optical windows from MEMpax®. More...

 

Windows made of AF 32® eco

The new alkali-free AF 32® eco thin glass is often used for micro-optics and a perfect choice for many optoelectronic applications. It can withstand temperatures up to 600 °C and features a consistent optical transmission plus an outstanding surface quality. More...

 

Windows made of AS 87 eco

AS 87 eco ultra-thin aluminosilicate glass is capable of offering high transmission beginning at upper UVC-wavelengths. It is flexible within certain limits and suitable for the production of ultrathin windows for optoelectronics. AS 87 eco provides excellent optical quality and micro-roughness. More...

 

*Note: The flatness of thin and ultra-thin windows is limited for physical reasons. Please consider that the planarity of thin glasses depends directly on the thickness since, with small thicknesses, the inherent mass already influences the flatness. Flatnesses, as are possible with window optics based on thicker materials, therefore cannot be achieved. However, those thin glasses mentioned above usually are the best choice for the highest planarity of optical windows at low thicknesses. They usually cannot be outperformed even by mechanical polishing processes.

 

 

Coated Windows:

 

ITO-coated optical windows

Our ITO-coated windows have a thin, optically transparent, electrically conductive indium-tin-oxide coating on one or both surfaces. We continuously produce many surface-resistivities based on different exotic glasses, so these are always available. More...

 

Multilayer-broadband-anti-reflection coated windows

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

 

Anti-reflective coated windows with additional oil-repellent coating NEW!

Our ARC-O series enables the production of oleophobic anti-reflective windows that repel fingerprints, liquids, and dirt. Such AR-coated windows are much easier to clean. More...

 

 

Custom Optical Windows:

We manufacture flat and plane optical windows in almost any custom size and shape on request. We can polish each window to a particular flatness or other optical specifications required for your application. The production of custom coatings, such as an antireflection coating for a specific wavelength or optical coatings for laser applications, is also part of our capabilities.

 

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

If you don't find the flat optical window you are looking for, please use our inquiry form or send your requirements by e-mail. We fabricate custom precision windows from many other glasses that are possibly not listed in this overview.

 

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