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
Material
Quartz + MgF2
Dimension Tolerance
+0.0, -0.2 mm
Retardation Tolerance
λ/100
Clear Aperture
>90% central area
Wavefront Distortion
λ/4 @ 632.8 nm
Surface Quality
40-20 scratch & dig
Parallelism Error
<30 arcsec
Laser Damage Threshold
5 J/cm2 10 ns pulsed @ 1064 nm typical
AR Coatings
BBAR coated by default
Mounting
Mounted in 25.4 mm black anodized metal mount
Drawing of achromatic waveplates
Standard codes
Wavelength, nm
Ordering Code
λ/2 Retardation
λ/4 Retardation
Clear Aperture 8 mm
340-560
14WPA.2-340-560-10
14WPA.4-340-560-10
450-650
14WPA.2-450-650-10
14WPA.4-450-650-10
550-750
14WPA.2-550-750-10
14WPA.4-550-750-10
650-1000
14WPA.2-650-1100-10
14WPA.4-650-1100-10
900-2100
14WPA.2-900-2100-10
14WPA.4-900-2100-10
Clear Aperture 12 mm
340-560
14WPA.2-340-560-12.7
14WPA.4-340-560-12.7
450-650
14WPA.2-450-650-12.7
14WPA.4-450-650-12.7
550-750
14WPA.2-550-750-12.7
14WPA.4-550-750-12.7
650-1100
14WPA.2-650-1100-12.7
14WPA.4-650-1100-12.7
900-2100
14WPA.2-900-2100-12.7
14WPA.4-900-2100-12.7
Clear Aperture 18 mm
340-560
14WPA.2-340-560-15
14WPA.4-340-560-15
450-650
14WPA.2-450-650-15
14WPA.4-450-650-15
550-750
14WPA.2-550-750-15
14WPA.4-550-750-15
650-1100
14WPA.2-650-1100-15
14WPA.4-650-1100-15
900-2100
14WPA.2-900-2100-15
14WPA.4-900-2100-15
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