Precision Glass Discs

Product Description

Precision glass discs from SCHOTT refer to small glass windows for a variety of optical and optoelectronic applications.

Precision glass discs can be made from a variety of flat glass materials. They are typically round in shape, but can also be offered in any other contour. Diameters of the glass discs can be as small as 1 mm and thickness could range from as low as 100 µm to more than 1 mm. Upon request, SCHOTT also can offer customised anti-reflective or beamsplitter coatings.


SCHOTT offers customized solutions with the following advantages:
  • Application-specific glass recommendation
  • Various shapes are available
  • Tight tolerances
  • Customized coating services
  • Washing and packing in cleanroom


Glass discs are used in a variety of optical and optoelectronic applications, such as:

Technical Details


Glass discs are manufactured using flat glass substrates. A high precision mask featuring the desired final disc shape is placed onto the glass substrate. Using different abrasive technologies, the glass between the masked portions of the substrate is taken away. After removal of the mask and a cleaning process, the glass discs are ready for packing.
Glass Process
Features / Specifications

SCHOTT offers glass discs of the following standard glass types:
Glass Description Alpha (20°C – 300°C) in 10–6 K-1 Tg in °C Dielectric Constant at
1 MHz
D 263 Chemically resistant
borosilicate glass
with high optical
7.2 557 6.7
BF 33 Borosilicate glass
with high
3.25 525 4.7
B 270® i Colorless crown
glass with high
9.4 533 7.0
AF 37T Aluminium-silicate glass (free of arsenic and alkalis) 3.77 711 5.5

The respective shape of the contour will be designed based upon the individual customer requirements. Optical coating (AR or beamsplitter) can be provided either single- or double-sided.

Forms of Supply and Product Packaging

SCHOTT Electronic Packaging offers individual packaging solutions based on the diverse needs and subsequent processing systems of our customers (e.g. packaging in trays to allow individual pick-up of discs using vacuum).

Please feel free to contact us for detailed information.


All precision glass discs are produced under clean-room conditions (Clean Room Class 10,000, ISO Category 7; US Federal Standard 209E; DIN EN 150 14644-1) and packed under a flowbox of Clean Room Class 1,000.

100% inspection by automated vision system is available as an added option. Upon request, discs can also be washed before packing. For more information on the different quality assurance programs, please click on our quality assurance process pages for more information.
Exhibitions & Events
Exhibition CIOE - China International Optoelectronic Exposition, Shenzhen, China, 09-01 to 09-03-2021
Exhibition Gastech, Singapore, Singapore, 09-13 to 09-16-2021
Electronic Packaging
SCHOTT North America, Inc.

15 Wells Street
Southbridge, MA 01550
E-Mail to SCHOTT+1 (508) 765-7450
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