Folded Camera Module Lens Ratio for Compact Stabilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to design a camera module that integrates a telephoto function and an image stabilization function within a small electronic device, while maintaining high power efficiency and minimizing installation space.
Innovation Solution
The camera module incorporates a first lens group, a reflection member, a second lens group, and an image sensor, where the first lens group has a focal length of f1, and the total focal length of the optical system, including both lens groups, satisfies the condition 1.2 < |f1/f| < 3, allowing for efficient use of space and power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a camera module with telephoto function and image stabilization function is installed in a small electronic device, then image quality and stabilization performance are improved, but installation space requirement increases
Solution Approach 1:
The patent applies folded optics by introducing a reflection member (prism) that redirects light at an angle, transforming the optical path from a linear arrangement to a folded geometry. This allows the telephoto lens group and image sensor to be positioned in a compact configuration that fits within the constraints of small electronic devices while maintaining the necessary focal length for telephoto functionality and space for image stabilization mechanisms
2Reliability
If a camera module with telephoto function and image stabilization function is installed in a small electronic device, then image quality is improved, but power consumption increases
Solution Approach 1:
The patent divides the optical system into distinct lens groups (first lens group with at least one lens, second lens group with at least three lenses) separated by a reflection member. This segmentation allows for optimized optical paths that reduce unnecessary light reflections and absorptions, thereby minimizing energy loss in the optical system while maintaining high image quality through precise focal length control
3Volume of moving object
If the focal length ratio is controlled within 1.2 < |f1/f| < 3, then space efficiency is improved, but optical system complexity increases
Solution Approach 1:
The patent optimizes the focal length ratio parameter between the first lens group (f1) and the second lens group (f) to satisfy 1.2 < |f1/f| < 3. This parameter control enables compact spacing between optical elements while maintaining proper image formation characteristics. The reflection member is positioned to redirect light from the first lens group to the second lens group with appropriate angular relationships, achieving space efficiency through careful parameter selection rather than complex multi-element designs
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 camera module to achieve high-quality telephoto images with image stabilization, while ensuring high power efficiency and compact design, suitable for small electronic devices.
Implementation Method 1
a reflection member configured such that light incident from the first lens group in a first direction is reflected by the reflection member in a second direction crossing the first direction
Data Source
AI summary
A camera module and an electronic device include the camera module having a first lens group including at least one lens, a reflection member configured such that light incident from the first lens group in a first direction is reflected by the reflection member in a second direction crossing the first direction, a second lens group arranged in the second direction and including at least three lenses, and an image sensor configured to receive an optical signal passing through the second lens group and generate an electrical signal related to an image based on the optical signal, wherein the camera module satisfies 1.2<|f1/f|<3, where f1 refers to a focal length of the first lens group, and f refers to a total focal length of an optical system including the first lens group and the second lens group.