Compact Optical Imaging With Movable Lens Groups and Reflectors
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Solution Overview
Problem
Existing camera modules in mobile devices require multiple lenses for optical zoom, leading to a complex structure.
Innovation Solution
An optical imaging system with movable lens groups and reflecting members that vary the focal length and field of view, utilizing a first lens group with negative refractive power and a second lens group with positive refractive power, and incorporating reflecting members to refract light multiple times, allowing for a compact design with adjustable focal length and field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple camera modules with different focal lengths are mounted to implement optical zoom, then the optical zoom function is achieved, but the structure becomes complicated
Solution Approach 1:
The patent combines multiple lens groups (first lens group with negative refractive power and second lens group with positive refractive power) into a single integrated optical system. This merging approach achieves optical zoom functionality through coordinated movement of lens groups and reflecting members, rather than using separate camera modules, thereby reducing structural complexity while maintaining adaptability
Solution Approach 2:
The patent employs dynamic adjustment mechanisms where at least one lens group and reflecting members can move along the optical axis to vary the interval between lens groups. This dynamic configuration enables focal length adjustment and optical zoom without requiring multiple fixed camera modules, simplifying the overall structure while preserving versatility
2Adaptability or versatility
If multiple camera modules are used for optical zoom, then the zoom function is achieved, but the device size increases
Solution Approach 1:
The patent introduces reflecting members that redirect light paths at angles, utilizing spatial dimensions beyond the simple linear arrangement of traditional lens systems. This allows the optical system to achieve compact folding of light paths, enabling zoom capability within a reduced device volume by exploiting three-dimensional space more efficiently
Solution Approach 2:
The patent arranges the first lens group, second lens group, and reflecting members in a nested configuration where components are positioned within the space created by light path folding. The reflecting members enable the system to nest optical elements more compactly, achieving zoom functionality without proportionally increasing device size
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves an optical zoom function and focusing capability while minimizing device size, utilizing a simplified structure with adjustable focal length and field of view.
Implementation Method 1
a first lens group including a plurality of lenses; a second lens group including a plurality of lenses... The first lens group may have negative refractive power, and the second lens group may have positive refractive power
Implementation Method 2
a first reflecting member disposed on an object side of the first lens group; and a plurality of second reflecting members arranged between the second lens group and an image sensor
Data Source
AI summary
An optical imaging system includes: a first lens group including a plurality of lenses; a second lens group including a plurality of lenses; a first reflecting member disposed on an object side of the first lens group; and a plurality of second reflecting members arranged between the second lens group and an image sensor. One or both of the first lens group and the second lens group is movable along an optical axis, an interval along the optical axis between the first lens group and the second lens group is varied between a first interval and a second interval smaller than the first interval, and as at least one of the first lens group and the second lens group is moved, one or more of the second reflecting members are moved.