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Optics / Waveplates / Achromatic air spaced

  • Achromatic waveplates – air spaced – 12.7 mm

    The achromatic waveplates are designed to eliminate wavelength dependence effectively over a wide spectral range, typically several hundred nanometres. The achromatic waveplates are available for four wavelength ranges: 465 nm to 610 nm (VIS), 610 nm to 850 nm (VIS/NIR), 700 nm to 1000 nm (NIR) and 1200 nm to 1650 nm (IR).
      • Wavelength options: 465 nm – 610 nm (VIS) | 610 nm – 850 nm (VIS/NIR) | 700 nm – 1000 nm (NIR) | 1200 nm – 1650 nm (IR)
      • Low retardance variation
      • With air space for high outputs
      • Free aperture of 12 mm
      • Retardance λ/2 and λ/4
      • Material: Crystalline quartz & MgF2
    • Thickness 0.3 to 1.3 mm
      Wave front deformation λ/4 @ 633 nm
      Surface quality 20/10 scratch/dig
      Parallelism 0.5 seconds
      Retardance tolerance λ/100 with respect to wavelength range
      Temp. coefficient of retardance less than λ/500 per °C
      Beam divergence/parallelism Less than 1 minute
      Angle of incidence tolerance For max. 1 %
      Retardance variation +/- 3°
      Storage temperature range -40°C to +75°C
      Coating (medium reflection) > 1% for 465–610 nm per surface, > 0.7% for 610–850 nm per surface, > 0.6% for 700–1000 nm per surface, > 0.5% for 1200–1650 nm per surface
      Damage threshold 2 J/cm2 (8 ns pulse @ 1064 nm); 500 kW/cm2, CW
      Diameter 25.4 mm with retaining ring
      Ring thickness 30 mm
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