Material Data

Applications

• Plane and curved mirror substrates
• Windows and spherical lenses
• All with any type of coating (HR, PR, AR) for the wavelength range given in the table
• High quality polishing (rms-roughness about 2Å) available

Properties

• High transmission from UV to NIR
• Very good homogeneity
• Small thermal expansion coefficient
• Resistent against laser induced damage

Optical Data

• Homogeneity (dn): Standard: < 3 x 10^-6 On request: down to 0.5 x 10^-6
• Max. bubble diameter: < 0.1 mm
• Max. cross section of bubbles in 100 cm³ of glass: < 0.03 mm²
• Max. cross section of inclusions in 100 cm³ of glass: < 0.03 mm²

Mechanical Data

• Density: 2.2 g/cm³
• Mohs hardness: 4.9 … 5.0
• Young modulus: 73 GPa
• Poisson ratio: 0.17

Thermal Data

• Thermal linear expansion coefficient: 0 … +200°C: 0.57 x 10^-6 K^-1 | -100 … +200°C: 0.48 x 10^-6 K^-1
• Specific heat capacity: 772 J/(kg*K)
• Thermal conductivity: 1.38 W/(m*K)
• Melting point: 1900°C

Applications

• Plane and curved mirror substrates
• Windows and spherical lenses
• All with any type of coating (HR, PR, AR) for the wavelength range given in the table
• High quality polishing (rms-roughness about 2Å) available

Properties

• High transmission from VIS to NIR (3µm)
• Very good homogeneity
• Small thermal expansion coefficient
• Resistent against laser induced damage

Optical Data

• Homogeneity (dn): Standard: < 3 x 10^-6, On request: down to 0.5 x 10^-6
• Max. bubble diameter: < 0.1 mm
• Max. cross section of bubbles in 100 cm³ of glass: < 0.03 mm²
• Max. cross section of inclusions in 100 cm³ of glass: < 0.03 mm²

Mechanical Data

• Density: 2.2 g/cm³
• Mohs hardness: 4.9 … 5.0
• Young modulus: 73 GPa
• Poisson ratio: 0.17

Thermal Data

• Thermal linear expansion coefficient: 0 … +200°C: 0.57 x 10^-6 K^-1 | -100 … +200°C: 0.48 x 10^-6 K^-1
• Specific heat capacity: 772 J/(kg*K)
• Thermal conductivity: 1.38 W/(m*K)
• Melting point: 1900°C

Applications

• Plane and curved mirror substrates
• Windows and spherical lenses
• All with any type of coating (HR, PR, AR) for the wavelength range given in the table
• All transmittive components are selected to be free of bubbles and inclusions

Properties

• High transmission from VIS to NIR
• Very good homogeneity

Optical Data

• Homogeneity (dn): Standard: < 2 x10^-5, On request: down to 1 x 10^-6
• Max. bubble diameter: < 0.1 mm
• Max. cross section of bubbles in 100 cm³ of glass: < 0.03 mm²
• Max. cross section of inclusions in 100 cm³ of glass: < 0.03 mm²

Mechanical Data

• Density: 2.51 g/cm³
• Young modulus: 82 GPa
• Poisson ratio: 0.206

Thermal Data

• Thermal linear expansion coefficient: -30 … +70°C: 7.1 x 10^-6 K^-1 | +20 … +300°C: 8.3 x 10^-6 K^-1
• Specific heat capacity: 858 J/(kg*K)
• Thermal conductivity: 1.114 W/(m*K)
• Melting point: 559°C

Applications

• Plane and curved mirror substrates
• Windows and spherical lenses
• HR-, PR-, AR-coatings for the NIR and DUV / VUV wavelength

Properties

• High transmission from VIS to NIR
• IR grade, UV grade und VUV grade material available
• Optical isotropic crystal

Optical Data

• Homogeneity (dn): Standard: < 2 x10^-5, On request: down to 1 x 10^-6
• Optical thermal coefficient: - 10.6 x 10^-6 K^-1

Crystallographic Data

• Structure: cubic
• Lattice constant: a = 5.462 Å

Mechanical Data

• Density: 3.98 g/cm³
• Mohs hardness: 4
• Young modulus: 75.8 GPa
• Poisson ratio: 0.26

Thermal Data

• Thermal linear expansion coefficient 18.85 x 10^-6 K^-1
• Specific heat capacity: 854 J/(kg?K)
• Thermal conductivity: 9.71 W/(m?K)
• Melting point: 1360 °C

Chemical Data

• Molecular Weight: 78.08
• Solubility: in Water: 0.0016 gram/cm³