Folded Light-Path Lens Module for Thin Long-Focus Cameras
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional long-focus lens modules are too large to fit within the thin form factor of modern mobile devices, limiting their adaptability and functionality.
Innovation Solution
A lens module design that folds the light path using reflection regions on lenses to reduce size, incorporating a first lens module for long focal length and a second lens module for focusing, supported by a bracket and driven by elastic members for focusing, with an optional image stabilization mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a conventional long-focus lens module is used to achieve long focal length imaging, then the imaging quality and zoom capability are improved, but the module size becomes too large to fit within thin mobile devices
Solution Approach 1:
The patent introduces a light reflection region that folds the optical path, transforming a linear optical arrangement into a folded configuration. This allows the optical path length to be extended in one dimension while keeping the physical module size compact in other dimensions, effectively resolving the contradiction between long focal length and small module size
Solution Approach 2:
The light reflection region is integrated within the lens structure itself, with the reflection path nested within the lens module boundaries. This nested configuration allows the optical path to fold back within the compact module volume, achieving long focal length without proportionally increasing module size
2Adaptability or versatility
If the lens module size is reduced to adapt to thin mobile device form factors, then the adaptability and integration are improved, but the imaging quality and optical performance may deteriorate
Solution Approach 1:
The patent applies different functional regions to different parts of the lens: the light transmission region maintains standard optical properties for image formation, while the light reflection region is specifically designed with reflective characteristics to fold the optical path. This localized functional differentiation allows the compact lens to achieve both size reduction and maintained imaging quality
Solution Approach 2:
The lens surface is segmented into distinct functional regions: a light transmission region for normal optical passage and a light reflection region for path folding. This segmentation allows independent optimization of each region's properties, ensuring that imaging quality is maintained in the transmission region while the reflection region enables compact form factor
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 design allows for a compact lens module that maintains imaging quality while adapting to the thin form factor of mobile devices, enabling long-focus capabilities and improved image stabilization.
Implementation Method 1
the first reflection region and the second reflection region are configured to refract light incident into the first lens from the light transmission region
Implementation Method 2
a light incident side surface of the first lens includes a light transmission region and a first reflection region; a light outgoing side surface of the first lens includes a second reflection region and a light outgoing region
Data Source
AI summary
This application provides a lens module. The lens module includes a first lens module and a second lens module, and the first lens module and the second lens module are arranged along an optical axis. The first lens module is configured to implement a long focal length, and the second lens module is configured to implement focusing. During specific disposition, the first lens module includes a first lens, and a light incident side surface of the first lens includes a light transmission region and a first reflection region; a light outgoing side surface of the first lens includes a second reflection region and a light outgoing region; and the first reflection region and the second reflection region are configured to refract light incident into the first lens. The second lens module includes at least one second lens, and the at least one second lens is a focusing lens.