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.

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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Achromatic Broadband Waveplates λ/2 Retardation14WPA.2-340-560-1014WPA.2-450-650-1014WPA.2-550-750-1014WPA.2-650-1100-1014WPA.2-900-2100-1014WPA.2-340-560-12.714WPA.2-450-650-12.714WPA.2-550-750-12.714WPA.2-650-1100-12.714WPA.2-900-2100-12.714WPA.2-340-560-1514WPA.2-450-650-1514WPA.2-550-750-1514WPA.2-650-1100-1514WPA.2-900-2100-15

Achromatic Broadband Waveplates λ/4 Retardation14WPA.4-340-560-1014WPA.4-450-650-1014WPA.4-550-750-1014WPA.4-650-1100-1014WPA.4-900-2100-1014WPA.4-340-560-12.714WPA.4-450-650-12.714WPA.4-550-750-12.714WPA.4-650-1100-12.714WPA.4-900-2100-12.714WPA.4-340-560-1514WPA.4-450-650-1514WPA.4-550-750-1514WPA.4-650-1100-1514WPA.4-900-2100-15