The elliptical polarizer, which is designed using linear polarizer and wave plate combination, is a very important polarization modulation device. It can meet the need of the different wavelengths or ellipticity angle through the orientation compensation and adjustment of the various components. And it has high practical value as it has wide wavelength tuning range and the stability output state. According to the elliptic matrix and Poincare Sphere Theory, there exist regular relationship among the devices′ orientation, phase and the wavelength. The different wavelength polarization state is affected by the matching condition. This design consists of a broadband transmission polarizing prism and two identical zero order plates. The prism can ensure the stability polarization direction of the incident light and, the wave plate can select the wavelength and change the ellipticity angle. The results show that the material properties limit the application range of the elliptical polarizer. The designed mica wave plate, whose continuous adjustable range is 700 nm, can be applied in the range of 300 ~1400 nm.