i-Line Glass

Product Information

i-Line glass - for applications requiring high uv-transmittance

i-Line glasses are optical glass types named after the i-wavelength, which offer both high UV-transmittance at 365 nm and high refractive index homogeneity. These glass types, such as N-BK7HTi, FK5HTi, LF5HTi and LLF1HTi are available in customized shapes and as a final component.


  • High refractive index homogeneity (PV < 0.5 ppm at 200 mm diameter)
  • Excellent internal quality
  • Negligible stress birefringence due to a well-defined annealing process
  • Variation of absolute refractive index values per lot of less than 5 x 10-5
  • Availability of a wide range of high transmission glass types ensures high flexibility in optical designs

Supply Forms

i-Line glass is available as:
Supply Forms
Customized shapes
  • CNC machined
  • coated
  • polished
  • sub-assembled
Diameter: up to 300 mm
Thicknesses: up to 100 mm

* Customized dimensions are possible. Please contact us.
We also offer high-precision optical components made of i-Line glass.

Technical Information


Homogeneity, bubbles/inclusions, and dispersion values according to the ‘Optical Glass - Catalogue', which you can find under Downloads.

Quality Assurance
  • i-Line glass is subject to a 100% control of homogeneity, stress birefringence, striae, bubbles, and inclusions
  • Refractive index and transmittance are statistically controlled
Advanced Optics

Hattenbergstrasse 10
55122 Mainz
E-Mail to SCHOTT+49 (0) 6131/66-1812
News, Trade Fairs & Events
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.