Unlike standard waveplate, Achromatic Waveplate( AWP) provide a constant phase shift independent of the wavelength of light that is used. This wavelength independence is achieved by using two different crystalline materials to yield quarter- or half-wave retardation over a broad spectral range. The Retardation tolerance of our AWP is better than λ/100 over the entire wavelength range. The flat response of an AWP is ideal for use with tunable lasers, multiple laser-line systems and other broad spectrum sources.
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Attribute
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Specification
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Material
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Crystal Quartz&MgF2
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Typical Diameter (Φmm)
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10.0, 12.7, 15.0, 20.0
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Diameter Tolerance (mm)
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+0.0/-0.2
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Wavefront distortion
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λ/4@633nm
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Retardation
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λ/2 and λ/4
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Retardation tolerance
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<λ/100 over wavelength range
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Parallelism
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<5 arc second.(General） , <3 arc second. (High Precision)
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Surface Quality
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40/20
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Clear Aperture
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Central 90%
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Coating
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<0.5% @wavelength range
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