Design of Miniature Camera Lens Including Diffractive Optical Elements

To meet the demand for miniature camera lens, in this paper, there designed a new type of miniature plastic lens, which is made up of three lenses. The second surface of the first lens is designed as a diffractive surface. The diffractive lens is used to eliminate aberration. There has investigated the primary aberration about the systems expressed by PWC. The function relation among P
_x
, W
_x
, C
_x
, and the diffractive lens structure have been established. These three lens materials are 'PMMAO', 'P-CARBO' and 'PMMAO'. The F-number is 2. 4 and FOV is 50°. The overall length of this optical system is 6.52mm. The MTF at 250lp/mm is higher than 0. 3.