Optical Image Capturing Module with Movable Lens Group
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Solution Overview
Problem
Conventional optical image capturing systems in portable electronic devices face challenges in minimizing size while maintaining high imaging quality and increasing light intake, especially in low-light environments.
Innovation Solution
The optical image capturing module employs a structural design with a combination of refractive powers and convex/concave surfaces in at least two optical lenses, along with a movable lens group and a focusing mechanism, to reduce size and enhance light intake, allowing for better imaging quality and increased pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical system uses conventional design with five or six lenses, then high optical performance is achieved, but the device size is large
Solution Approach 1:
The optical system is divided into multiple lens groups with different functions (first lens group for light gathering, second lens group for focusing, third lens group for aberration correction). This segmentation allows each group to be optimized independently, reducing the total number of lenses needed while maintaining optical performance.
Solution Approach 2:
The patent employs a nested structure where the movable base is disposed within the fixed base, and lens groups are arranged in a compact sequence. The optical elements are nested along the optical axis to minimize the overall device volume while maintaining the required optical path length.
2Illumination intensity
If the optical system is designed for large aperture to take pictures in dark environment, then light intake is increased, but the device size increases
Solution Approach 1:
The first lens is designed with a large aperture specifically for light gathering in low-light conditions, while other lens groups maintain smaller apertures optimized for their specific functions. This local optimization allows large aperture benefits without the proportional increase in overall device size.
Solution Approach 2:
The patent uses asymmetric lens designs where the aperture diameter and effective focal length relationships are optimized in the radial dimension while maintaining compact axial length. This dimensional optimization allows large light intake capability within a compact form factor.
3Reliability
If more lenses are added to improve imaging quality, then optical performance is enhanced, but device complexity increases
Solution Approach 1:
Each lens group is designed to perform multiple functions: the first lens group handles both light gathering and initial focusing, the second lens group provides both focusing and aberration correction, and the third lens group contributes to both image quality and compactness. This multi-functionality reduces the need for separate dedicated lenses.
Solution Approach 2:
The patent implements a movable base that can shift relative to the fixed base along the optical axis, enabling dynamic focusing adjustment. This dynamic mechanism replaces the need for multiple fixed-focus lens groups, simplifying the overall system while maintaining imaging quality across different focus distances.
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 design achieves improved light intake and imaging quality, enabling high-resolution images in compact electronic devices, including those used in dark environments.
Implementation Method 1
The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens... each lens having specific refractive power and surface curvature to refract and focus light
Implementation Method 2
The movable base is controllable to move relative to the fixed base in the focusing hole in a central axial direction of the focusing hole
Data Source
AI summary
An optical image capturing module includes a lens assembly and a circuit assembly including a circuit substrate and an image sensing component electrically connected to the circuit substrate via signal transmission elements. The lens assembly includes a fixed base disposed on the circuit substrate, a movable base, and a lens group. The fixed base made of an opaque material has a focusing hole penetrating through two ends of the fixed base, and is disposed on the circuit substrate, thereby the fixed base is hollow, and the image sensing component is located in the focusing hole. The movable base disposed in the focusing hole could move relative to the fixed base. The lens group including at least two lenses having refractive power is disposed in a receiving hole of the movable base, thereby light could pass through the lens group and project onto a sensing surface of the image sensing component.