Optical Windows

Präzisions Glas & Optik GmbH has been a leading manufacturer of optical windows serving industry, research, and science for over 25 years. Optical windows are essential elements that transmit light, images, or lasers within optical systems without degrading quality. The selection of the appropriate raw material is crucial in achieving the desired optical performance. Therefore, we exclusively use high-purity and specialty flat glass to manufacture optical windows, ensuring minimal distortion, excellent imaging, and maximum transparency.

 

Optimal Solutions for Various Optical Requirements

For every optical requirement, there is an optimal solution. While using high-end glass may not be necessary for basic applications, advanced uses often require highly pure materials to function effectively. We are here to help you select the most optimal and economical solution for your optical application.

 

 

Glasses for Optical Windows

We offer various glasses for manufacturing translucent optical windows and optical flats. Below are links to data sheets with technical details and optical specifications to assist you in finding the best solution for your project:

 

BK7 Windows

BK7 is a standard in the industry for the visible wavelength range that require optical-grade windows. Due to its purity, we fabricate custom precision optics from BK7, making it ideal for laser applications as well as lenses. Read more ...

 

Quartz Windows Made of Optical-Grade Synthetic Fused Silica

Optical-grade synthetic fused silica provides nearly perfect purity and outstanding optical characteristics. It provides exceptional transmission from deep ultraviolet to infrared light. UV optics typically require fused silica, as it already provides a T > 80% at 185 nm. Additionally, it can operate at temperatures up to 1000 °C. Read more ...

 

BOROFLOAT^® Windows

BOROFLOAT^® is resistant to temperatures up to 500 °C and has excellent optical characteristics, low absorption, and high chemical resistance. It is ideal for industrial-grade windows from visible to infrared wavelengths and is an economical choice for components like mirrors and filter optics. It is available at various standard thicknesses. Read more ...

 

B 270^® – Superwite Windows

B 270^® is a clear crown glass known for its superb light transmission. When optically polished, it can be used to produce demanding optical windows, optical flats, and even laser optics. Read more ...

 

Windows Made of Selected Float Glass

The cost-effective material offers superior optical properties and flatness, making it suitable for optical mirrors, filters, and anti-reflection coatings. It offers good transmissivity for visible light and is available in thicknesses from 0.4 mm to 4 mm. Read more ...

 

 

Thin and Ultra-Thin Optical Windows

 

Windows Made of D 263 T

D 263 T is ideal for thin and ultra-thin optics and is available in various standard thicknesses. Featuring remarkable flatness and low warp, we fabricate rectangular windows starting at 50 µm thickness. Read more ...

 

Windows Made of CORNING^® EAGLE XG^®

Alkali-free EAGLE XG^® serves as a base for modern LCD and OLED displays. It is suitable for wafer-level optics, offering low micro-roughness, excellent surfaces, and high flatness. Read more ...

 

Windows Made of 1737F

This alkali-free boro-aluminum silicate material has low micro-roughness and is suitable for COG (chip-on-glass) processes. We use 1737F to create flat, thin optical windows with specific requirements regarding micro-roughness, smoothness, and flatness. Read more ...

 

Windows Made of EAGLE²⁰⁰⁰

The lightweight, alkali-free EAGLE²⁰⁰⁰ surpasses display quality and works in demanding thin optical window applications. It is color-neutral and withstands elevated temperatures. Read more ...

 

Windows Made of MEMpax^®

MEMpax^® borosilicate glass offers similar thermal expansion properties as BOROFLOAT^®, but with superior surfaces and planarity. It is perfect for ultra-thin window optics with transmittance from UV to infrared. Read more ...

 

Windows Made of AF 32^® eco

Alkali-free AF 32® eco is a perfect choice for sensor covers in micro-optics and numerous optoelectronic use cases. It can withstand temperatures up to 600 °C and offers uniform optical transmittance and excellent surface quality. Read more ...

 

Windows Made of AS 87 eco

This aluminosilicate glass offers high transmittance at upper UVC wavelengths and provides exceptional optical characteristics and low micro-roughness, making it suitable for ultra-thin windows in optoelectronics. Read more ...

 

*Note: The flatness of thin and ultra-thin glass parts is physically limited. Planarity depends on thickness because at smaller thicknesses, the glass’s own mass affects flatness. Therefore, the flatness achievable with thicker glasses cannot be matched by thinner ones. Nonetheless, the materials listed above are typically the best option for maximum planarity at low thicknesses and generally surpass what mechanical polishing can achieve.

 

 

Coated Windows:

 

ITO-Coated Optical Windows

Our ITO-coated windows feature a thin, optically transparent, electrically conductive indium-tin-oxide coating and are produced to accommodate various surface resistivities. Read more ...

 

Multilayer Broadband Anti-Reflection-Coated Windows

Eliminate ghost images and phantom laser beams with our anti-reflection-coated windows that reduce optical attenuation and significantly increase transparency. Read more ...

 

Anti-Reflective-Coated Windows with Additional Oil-Repellent Coating

Our ARC-O series creates oleophobic windows that repel fingerprints, liquids, and dirt, making them easier to clean. Read more ...

 

 

Custom Optical Windows:

We manufacture flat and plane window optics in almost any custom size and shape on request. Customized windows polished to specific flatness or optical specifications, including AR-coated windows for specific wavelengths or lasers, are part of our capabilities.

 

Cannot Find What You’re Looking For?

If the optical windows listed here don’t meet your needs, feel free to use our inquiry form. We regularly fabricate custom precision optics from other glasses not listed in this overview.

 

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Last update: July 28, 2025