Optical system i.e. compact lens, for camera module of e.g. mobile phone, for reproducing digital object, has groups of lenses arranged from distance from object in direction of detection unit, where screen is attached to one of groups

摘要

The optical system has groups (G1, G2) of lenses (L1-L5) arranged from distance from an object in the direction of an image detection unit (BE), where the group (G1) of lenses (L1, L2) has negative refraction power and the group (G2) of lenses (L3-L5) has positive refraction power. A screen (B) is attached to the group (G2), and the image detection unit is movably arranged in the system. A beam switching unit is provided with a mirror or a prism, which is designed as Porro prism.