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STANDA in Lithuania
STANDA  P.Box.2684, LT-03001 Vilnius 9 P.O., Lithuania
Phone +370 5 2651474, Fax +370 5 2651483
E-mail: sales@standa.LT
   
Standa in the World
   
 
Home > Polarizing Optics > 14WPA - Achromatic (Broadband) Waveplates
Operates over Broad Bandwidth wavelength range
 
We specialize in Air-spaced Achromatic Waveplates
 
All waveplates are BBAR coated and mounted by default
 
Custom design waveplates are available in small and mass production quantities


Achromatic waveplate (AWP) is a pair of crystal quartz and magnesium fluoride plates. Because of difference in dispersion in these uniaxial positive crystals it is possible to calculate thickness of each plate so that birefringent phase shift in assembly changes very slowly over certain wavelength range. This is a way to obtain achromatic zero order waveplates. Such AWPs are necessary for various devices and may replace a number of ordinary quartz waveplates operating at single wavelength only. We can offer series of achromatic waveplates with phase shifts shown in graphs below.

Typical retardation curves for 650-1100 nm achromatic waveplates

Standard Specifications
MaterialQuartz + MgF2
Dimension Tolerance+0.0, -0.2 mm
Retardation Toleranceλ/100
Clear Aperture>90% central area
Wavefront Distortionλ/4 @ 632.8 nm
Surface Quality40-20 scratch & dig
Parallelism Error<30 arcsec
Laser Damage Threshold5 J/cm2 10 ns pulsed @ 1064 nm typical
AR CoatingsBBAR coated by default
MountingMounted in 25.4 mm black anodized metal mount
  Drawing of achromatic waveplates


Standard codes
Wavelength, nmOrdering Code
λ/2 Retardationλ/4 Retardation
Clear Aperture 8 mm
340-56014WPA.2-340-560-1014WPA.4-340-560-10
450-65014WPA.2-450-650-1014WPA.4-450-650-10
550-75014WPA.2-550-750-1014WPA.4-550-750-10
650-100014WPA.2-650-1100-1014WPA.4-650-1100-10
900-210014WPA.2-900-2100-1014WPA.4-900-2100-10
Clear Aperture 12 mm
340-56014WPA.2-340-560-12.714WPA.4-340-560-12.7
450-65014WPA.2-450-650-12.714WPA.4-450-650-12.7
550-75014WPA.2-550-750-12.714WPA.4-550-750-12.7
650-110014WPA.2-650-1100-12.714WPA.4-650-1100-12.7
900-210014WPA.2-900-2100-12.714WPA.4-900-2100-12.7
Clear Aperture 18 mm
340-56014WPA.2-340-560-1514WPA.4-340-560-15
450-65014WPA.2-450-650-1514WPA.4-450-650-15
550-75014WPA.2-550-750-1514WPA.4-550-750-15
650-110014WPA.2-650-1100-1514WPA.4-650-1100-15
900-210014WPA.2-900-2100-1514WPA.4-900-2100-15
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