Germanium Windows

Download Optics for CO2-Lasers Datasheet (PDF, 198 KB)

Specifications:

1.
Material: optical grade monocrystalline Ge
2.
Clear aperture: > 90% of a size
3.
Diameter (width & length) tolerances, mm: +0.0 / -0.1
4.
Thickness tolerance, mm: +/- 0.1
5.
Parallelism, arc. min.: <= 5
6.
Surface quality, scr/dig:  
  for parts to 3 in.: 40/20
  for parts to 8 in.: 60/40
  for larger parts: 80/50
7.
Surface figure (power-irregularity) @ 633 nm, fringe: 1 - 1/2
8.
Coating (residual reflectivity is specified per surface):  
  AR/AR @ 10.6 µm, %: < 0.5
  BBAR/BBAR @ 9-11 µm, %: 2.0
9.
Damage threshold:  
  CW mode, kW/cm2: 1

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