Camera Module Optical Path Folding for Compact Zoom

The patent introduces optical path folding units that redirect the optical path in directions intersecting the optical axis, transforming the linear arrangement into a multi-dimensional folded structure. This allows the optical imaging system to achieve adjustable focus and magnification while maintaining a compact overall length by utilizing spatial dimensions perpendicular to the optical axis.

The patent arranges multiple lens groups and optical path folding units in a nested configuration where components are positioned within the space created by folded optical paths. The first and second lens groups are sequentially disposed with optical path folding units between them, creating a compact nested structure that reduces the overall system length while maintaining zoom functionality.

The patent designs lens groups where each lens serves multiple functions. The first lens group includes lenses for both focus adjustment and magnification control, while the second lens group similarly provides dual functionality. This multi-functional design reduces the total number of lenses needed compared to separate dedicated lens groups for each function.

The patent incorporates movable reflective members that can dynamically adjust the optical path lengths between lens groups and the imaging plane. This dynamic adjustment mechanism allows the system to achieve variable focus and magnification by changing the positions of movable components rather than requiring multiple fixed lens groups, thereby reducing overall device complexity.