Lens system for digital camera module, has one of two lens with concavely designed side in one area corresponding to two-thirds of diameter of side and flatly designed side in other area corresponding to two-thirds of diameter of other side

摘要

The system has a lens (9) with a side (11) directed towards an object and another side (12) directed towards a lens (10), and a diffractive optical unit. The lens (10) includes two aspherically designed sides (13, 14). The side (13) is concavely designed in an area, which corresponds to two-thirds of diameter of the side (13). The side (14) is designed flat in another area, which corresponds to two-thirds of diameter of the side (14). The side (13) is directed towards another side (12) of the lens (9) and another side (14) is directed towards image detecting units (16) of a digital camera module. One lens is formed from Zeonex (RTM: olefin) and another lens is formed from polycarbonate.