HR Right Angle Retroreflector, 380-420nm

Manufacturer's part number :


Manufacturer Altechna


Description :

HR right angle retroreflector is optimised for a spectral bandwith from 380nm to 420nm with an incidence angle of 45°, this right angle retroreflector is well suited for femetosecond applications. Ultrashort pulse back-reflection task requires group delay management. Due to this reason common retroreflector prism is not applicable as it introduces considerable group delay dispersion which distorts pulse's temporal shape. Hollow configuration of right angle retroreflector, consists of two HR coated mirrors, featuring total reflectance higher than 99,6 %. Moreover, group delay dispersion (GDD) of HR coatings is optimized to be <20 fs², what makes HR right angle retroreflector a perfect solution for fs applications.

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  • Material: UVFS
  • Spectral range: 380nm - 420nm
  • Group delay dispersion (GDD): < 20fs²
  • Angle of incidence: 45°
  • Reflection Rs/Rp/R average: 99,5% /98 %/99%
  • Dimensions 40mm x 20mm
  • Dimension tolerance: +0.0/-0.2 mm
  • Clear Aperture: >80%
  • Angle tolerance at 90°: ±30 arcsec
  • Pyramidal error: <1 arcmin
  • Surface quality: 20/10 S/D
  • Surface Flatness: <λ/8 @ 632.8 nm
  • Benefits

  • Hollow configuration
  • Reflectance >99,6 % per surface
  • Mirrors are deposited on UVFS substrates
  • Negligible pulse dispersion