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< Tech. doc. < properties and transmission of optical materials


BOROSILICATE - (PDF Properties and Curves)


PROPERTIES of BOROSILICATE


MECHANICAL PROPERTIES
Density : 2.76 g/cm3


THERMAL PROPERTIES
Softening Point : 844°C
Annealing Point : 593°C
Max Service Temperature : 639°C
Thermal Expansion Coefficient : 46 x10-7 °C-1 aT 0...300°C


ELECTRICAL PROPERTIES
Dielectric Constant at 1MHz a 20°C : 5.84


OPTICAL PROPERTIES

Transmission (0.5mm thick) :70% a 320nm
  : 90% a 360nm
  : 90% a 380...2200nm
Refraction Index : 1.5440 a 435,8nm
  : 1.5354 a 546,1nm
  : 1.5311 a 643,8nm