UV Grade Fused Silica Optical Glass

Density

2.20g/cm³

Abbe Constant

67.6

Refractive Index (nd) at 588nm

1.4586

Wavelength (um)

Refractive Index (n)

Wavelength (um)

Refractive Index (n)

0.200

1.55051

1.000

1.45042

0.220

1.52845

1.064

1.44962

0.250

1.50745

1.100

1.44920

0.300

1.48779

1.200

1.44805

0.320

1.48274

1.300

1.44692

0.360

1.47529

1.500

1.44462

0.400

1.47012

1.600

1.44342

0.450

1.46557

1.700

1.44217

0.488

1.46302

1.800

1.44087

0.500

1.46233

1.900

1.43951

0.550

1.46008

2.000

1.43809

0.588

1.45860

2.200

1.43501

0.600

1.45804

2.400

1.43163

0.633

1.45702

2.600

1.42789

0.650

1.45653

2.800

1.42377

0.700

1.45529

3.000

1.41925

0.750

1.45424

3.200

1.41427

0.800

1.45332

3.370

1.40990

0.850

1.45250

3.507

1.40566

0.900

1.45175

3.707

1.39936

Hardness

5.5 - 6.5 Mohs' Scale 570 KHN 100

Design Tensile Strength

4.8x10⁷ Pa (N/mm2) (7000 psi)

Design Compressive Strength

Greater than 1.1x10⁹ Pa (160,000 psi)

Bulk Modulus

3.7x10¹⁰ Pa (5.3x10⁶ psi)

Rigidity Modulus

3.1x10¹⁰ Pa (4.5x10⁶ psi)

Young's Modulus

7.2x10^-10 Pa (10.5x10⁶ psi)

Poisson's Ratio

0.17

Coefficient of Thermal Expansion

5.5x10^-7cm/cm.°C (20°C-320°C)

Thermal Conductivity

1.4 W/m.°C

Specific Heat

670 J/kg.°C

Softening Point

1683°C

Annealing Point

1215°C

Strain Point

1120°C

Electrical Receptivity

7x10⁷ ohm.cm (350°C)

Dielectric Properties (20°C and 1 MHz)
Constant
Strength
Loss Factor
Dissipation Factor

3.75
5x10⁷ V/m
Less than 4x10^-4
Less than 1x10^-4

Chemical Stability (except hydrofluoric)

High resistance to water and acids