Imaging Lens Assembly with Tilting Mirrors for Compact Multi-Focal Design
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Solution Overview
Problem
Conventional imaging lens assemblies face challenges in compactly mounting multiple collapsible optical systems with different focal lengths, making it difficult to achieve both miniaturization and good optical performance.
Innovation Solution
The imaging lens assembly includes a first lens group for short focal length, a second lens group for long focal length, and a third lens group that can switch between focal lengths, with mirrors that tilt to form optical paths and secure storage space, allowing for compact configuration and optical performance maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional imaging lens assembly positions a prism on the object side of a lens group to secure focal length within restricted space, then the focal length is secured within restricted space, but it becomes difficult to compactly mount multiple collapsible optical systems with different focal lengths
Solution Approach 1:
The patent employs movable mirrors that can tilt between a shooting state (forming optical paths) and a storage state (perpendicular to optical axis). This dynamic configuration allows the optical system to adapt between different operational modes, enabling compact mounting of multiple collapsible optical systems with different focal lengths while maintaining the ability to secure focal length within restricted space during operation
Solution Approach 2:
The patent introduces mirrors positioned at angles to the optical axis, utilizing three-dimensional spatial arrangement rather than conventional linear positioning. By tilting mirrors to form optical paths at angles and positioning them in multiple dimensions, the system achieves compact folding of optical paths, enabling multiple optical systems to be mounted compactly while maintaining their respective focal lengths within restricted space
2Volume of moving object
If the imaging lens assembly is miniaturized to meet portable device requirements, then the device size is reduced, but optical performance may deteriorate
Solution Approach 1:
The patent implements a nested configuration where multiple lens groups (first, second, and third lens groups with different focal lengths) are arranged in a compact, space-efficient manner. The collapsible design allows lens groups to be nested or folded into each other when not in use, significantly reducing the overall volume of the imaging device while maintaining full optical performance when deployed
Solution Approach 2:
The patent creates a multi-functional optical system where a single imaging lens assembly can operate at multiple focal lengths (short, medium, and long) through the coordinated movement of different lens groups and mirrors. This universal design eliminates the need for separate optical systems for different focal lengths, reducing overall device size while maintaining excellent optical performance across all shooting modes
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
This configuration enables the miniaturization of the camera module while maintaining excellent optical performance by allowing the lens groups to change positions and form optical paths efficiently, addressing the challenge of compactly integrating multiple focal lengths.
Implementation Method 1
the first mirror or the second mirror is configured to form an optical path optically connecting a corresponding lens group, which is among the first lens group and the second lens group, and the third lens group by tilting with respect to both of an optical axis direction of the corresponding lens group and an optical axis direction of the third lens group in the shooting state
Data Source
AI summary
An imaging lens assembly includes a first lens group for shooting at a short focal length, a second lens group for shooting at a long focal length, a third lens group for shooting at the short focal length and the long focal length, a first minor positioned between the first lens group and the third lens group; and a second mirror positioned between the second lens group and the third lens group. The first lens group and second lens group change its position in an optical axis direction between a shooting state and a lens storage state. The first minor or second mirror forms an optical path optically connecting a corresponding lens group and the third lens group. The first minor or second minor secure a storage space for the corresponding lens group.