Low Tg Glass for Precision Molding

Product Information

Low transformation temperatures suitable for precision molding

Precision molding is one of the state-of-the-art-technologies for the volume production of complex lenses (e. g. aspheres), for various applications.

SCHOTT offers several optical glasses specifically developed for precision molding – the low Tg glasses, such as P-SF68, P-SK57Q1, P-SK58A and P-BK7.

Low Tg glasses have a glass transformation temperature suitable for precision molding and a special glass composition to decrease the tendency for devitrification and to reduce the reaction with mold materials within the molding temperature range.

During precision glass molding, a polished or fire polished preform is shaped into a final geometry, while conserving its surface quality. The typical temperature range for the molding process is between 500 °C and 700 °C, enabling the extension of the operating lifetime of the mold material and a significant time reduction of the press process.

SCHOTT low Tg glasses are provided in the form of optical glass rods as well as ball lenses in different formats.

Advantages

  • Low transformation temperatures, mostly below 550 °C, to increase lifetime of molds and to reduce process time
  • Low tendency for chemical interaction between glass constituents and mold materials within the molding temperature range
  • Tight optical tolerance
  • Wide range of dimensions
  • Various forms of supply
  • Application support

Supply Forms

Low Tg glass for precision molding is available as:
 
Supply Forms*
Dimensions*
Optical glass rods
  • various shapes
  • various surface qualities

Diameter: < 1 mm - 7.5 mm; length: up to 1,000 mm
Diameter: > 7.5 mm - 12.5 mm; length: up to 140 mm
Ball lenses
  • different formats
Diameter: 0.8 mm - 14 mm

* Other supply forms and dimensions upon request. Please contact us.

Technical Information

Materials used

Low Tg Optical Glasses
Contact
contact-home.png
Advanced Optics
SCHOTT AG

Hattenbergstrasse 10
55122 Mainz
Germany
contact-phone.png
E-Mail to SCHOTT+49 (0) 6131/66-1812
News, Trade Fairs & Events
22.
November
Trade fair C-Touch & Display, Shenzhen, China, 22.11 - 24.11.2018
20.
November
Trade fair Future Interior Summit, Böblingen, Germany, 20.11 - 21.11.2018
SCHOTT uses Cookies on this Website to enhance the user experience and provide the best possible Service. By continuing to browse the Website, you consent to our use of Cookies.