Achromatic waveplate
Achromatic waveplate is similar to zero order waveplate except that the two plates are made from different birefringent crystals.
Since the dispersion of the birefringence of two materials is different, it is possible to specify the retardation values at a broad wavelength range. So, the retardation will be less sensitive to wavelength change. In other words, it can be used at a broadband wavelength range.
Since the dispersion of the birefringence of two materials is different, it is possible to specify the retardation values at a broad wavelength range. So, the retardation will be less sensitive to wavelength change. In other words, it can be used at a broadband wavelength range.
Specifications
|
Material |
Crystal Quartz+MgF2 |
|
Dimension Tolerance |
+0.0/-0.1mm |
|
Wavefront Distortion |
λ/[email protected] (for air spaced type) |
|
Retardation Tolerance |
λ/100 |
|
Parallelism |
<10 arc seconds (for single plate) |
|
Surface Quality |
40/20 scratch and dig |
|
Clear Aperture |
>90% central area |
|
Standard Wave |
Quarter-wave(λ/4), Half-wave(λ/2) |
|
Standard Wavelength |
450-650nm |
|
Coating |
Both sides AR coated |
|
Epoxy Cemented or Air Spaced Available |
|
|
Other Wavelength Available |
|
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