Abstract: According to the large aberration of conformal optical system caused by the large slope and eccentric, the rotation double Zernike phase plates were combined with fixed corrector based on Wossermann-Wolf equation. The aberration of optical system in different field of regard(FOR) was effectively corrected by rotating the two plates. It can both improve the image quality and make the structure more compact. An optical system with f=90 mm, diameter D=48 mm, wavelength 3.7-4.8 m, field of regard(FOR) 42, instant view angle 2.44 was designed. The results show that each field of optical transfer function is close to the diffraction limit. An optical passive athermal infrared conformal system is realized by using DOE elements. During -20-60C the merit transmitting function in each FOR is more than 0.45 at 17 lp/mm. The image quality performs well.