Achromatic waveplates los ntawm kev siv ob daim phiaj.Nws zoo ib yam li Zero-order waveplate tshwj tsis yog tias ob daim hlau yog tsim los ntawm cov khoom sib txawv, xws li siv lead ua quartz thiab magnesium fluoride.Txij li thaum lub dispersion ntawm birefringence tuaj yeem sib txawv rau ob cov ntaub ntawv, nws muaj peev xwm hais kom meej cov nqi retardation ntawm lub wavelength ntau.
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