Because of their many performance advantages and new low cost, Spectral Optics is now offering only zero-order waveplates in all the standard wavelengths and sizes. There is no reason to design-in multiple-order waveplates ever again!
Multiple-order waveplates show rapid changes in retardation as the wavelength changes, as seen at left. For a small change ∆λ (or equivalent change in temperature), the multi-order waveplate shows a large transmission change ∆Tmulti. By contrast, the change in retardation of the zero-order plate is very slow, so the same ∆λ gives a much smaller change, ∆Tzero.
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