BK7 Schott glass optical properties

BK7 Optical Glass

Optical glass with high transmission, can be selected nearly free of bubbles and inclusions and has very good homogeneity (down to 1x10-6)

Thermal/Mechanical Properties

Density (at 20 °C/68 °F): 2.51 g/cm 3
Thermal Coefficient of Expansion (20/300 °C): 7.0 x 10-6/°C
Strain Point:°C/ °F
Annealing Point:°C/ °F
Softening Point:°C/ °F

Optical Properties

Refractive Index(l=582.1nm): 1.509
Optical transmission

Chemical Properties

Hydrolytic resistance: class 2
Acid resistance: class 1
Alkali resistance: class 2

Electrical Properties

Dielectric Constant: E=







Return to Home Page Optical polishing, lapping, dicing and optical components polishing

print page

Last Updated 15 January 2013


Power Search Powered by KSearch


Valley Design East
Two Shaker Road, Bldg. E-001
Shirley, MA 01464
Phone: 978.425.3030
Fax: 978.425.3031

Valley Design
Santa Cruz, CA 95060 
Phone: 831.420.0595 
Fax: 831.420.0592

©2014 Valley Design Corp. All Rights Reserved