Design of WFOV optical lens for CCD camera

To improve the imaging quality of CCD camera and make the lens small in size，compact in structure，the wide field of view (WFOV) optical lens with the standard quadric surface and even aspheric surface was designed．According to the primary aberration theory, the position of aspheric surface and the solution law of initial structure parameters were analyzed. A design example of a lens whose operating wavelength was 0.4-0.7μm，full fieldofview angle was 80°and relative aperture was 1∶1.5 was given on the basis of the theoretical calculation and the optimization of optical design software ZEMAX. The MTF of the lens，which is composed of four spherical lenses and three aspheric lenses，is better than 0.85 at the spatial frequency of 40lp／mm. The full fieldofview distortion of the lens is less than 3％.