A window with a substrate made of single-crystal silicon. No absorption in the infrared region up to 6μm. With anti-reflective (AR) coating on the both faces, the product delivers even superior transmission properties highly suitable for windows.





  • The AR-coated model offers high transmission properties for a wide range of light (3μm-5μm).
  • The product can be used as a window forspecimen observation, laser irradiation, etc.



Typical Specifications

Model SIWI
Wavelength Range 3 – 5μm or 2 – 6μm
AR Coating Y N
Reflectance < 2.0%
(One Side)
Size Φ25 x 1tmm, Φ30 x 1tmm
Substrate Single-crystal silicon
Parallelism Within 3 minutes
Scratch-Dig  60-40
Effective Diameter 80% of the actual diameter

Wavelength Characteristics of Reflectance(AR-coated)


ength Characteristics of Reflectance(AR-uncoated)