Material Data

We use fused silica (FS), various optical Schott glasses (N-BK7®) and various crystals (CaF2, YAG) as substrate materials. Please look below to find some further details for those, our most used materials.

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
Wavelenght (nm)nti (t = 10mm)
170.01.6150.63
194.21.558860.95
202.21.54710.96
213.91.534270.977
226.51.522930.985
237.81.514710.99
265.21.500020.993
312.61.484490.999
365.01.474530.999
404.71.469610.999
435.81.466690.999
480.01.46350.999
486.11.463120.999
546.11.460080.999
587.61.458460.999
589.31.45840.999
643.81.456710.999
656.31.456360.999
706.51.455150.999
852.11.452460.999
10141.450230.999
10831.44940.999
13851.4450.88
fused silica transmission curve

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
Wavelenght (nm)nti (t=10mm)
170.01.6150.63
194.21.558860.95
202.21.54710.96
213.91.534270.977
226.51.522930.985
237.81.514710.99
265.21.500020.993
312.61.484490.999
365.01.474530.999
404.71.469610.999
435.81.466690.999
480.01.46350.999
486.11.463120.999
546.11.460080.999
587.61.458460.999
589.31.45840.999
643.81.456710.999
656.31.456360.999
706.51.455150.999
852.11.452460.999
10141.450230.999
10831.44940.999
13851.4450.88
2058.11.43720.999
Infrasil transmission curve

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
Wavelenght (nm)nti (t=10mm)
3651.536270.994
404.71.530240.998
435.81.526680.999
4801.522830.999
486.11.522380.999
546.11.518720.999
587.61.51680.999
589.31.516730.999
632.81.515090.999
643.81.514720.999
656.31.514320.999
706.51.512890.999
852.11.509800.999
10141.507310.999
10601.506690.999
15291.500910.997
transmission curve of N-BK7

Applications

  • Plane and curved mirror substrates
  • Windows and spherical lenses
  • Special polishing (rms-roughness 1-2 Å) possible
  • 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

  • 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
Wavelenght (nm)n
143.31.711
160.51.5547
172.51.5289
181.91.5152
1931.5015
2001.49547
2201.4811
2401.4712
2601.46391
2801.45836
3001.45402
5001.43647
10001.42888
20001.42385
30001.41785
40001.40963
50001.39895
60001.38559
70001.36932
transmission curve of calcium fluoride