Optical Image Capturing Module Compact Design
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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, due to the complexity of the optical system and the need for high optical performance.
Innovation Solution
The optical image capturing module employs a compact design with a combination of refractive powers and convex/concave surfaces in at least two optical lenses, optimized structural parameters, and an IR-cut filter to enhance light entry and improve imaging quality, allowing for better light intake and higher pixel density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the optical system uses five or six lenses to provide high optical performance, then imaging quality is improved, but the size of the optical module increases
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive indices, curvatures, and thicknesses of lens elements. Specifically, it uses a combination of positive and negative refractive power lenses with carefully controlled parameters (e.g., focal length ratios, curvature radii) to achieve high imaging quality in a compact form factor, resolving the contradiction between optical performance and module size
Solution Approach 2:
The patent employs composite optical design by combining multiple lens materials with different refractive indices and dispersion properties. The optical system integrates lenses made from different glass or plastic materials to correct aberrations and improve image quality while maintaining a reduced overall size, addressing the contradiction between imaging quality and compactness
2Illumination intensity
If the optical system increases aperture to take pictures in dark environment, then light intake is improved, but the size of the optical module increases
Solution Approach 1:
The patent uses parameter changes to achieve high light intake in a compact design by optimizing the F-number (aperture ratio) through careful selection of focal length and entrance pupil diameter. The design achieves a balance between aperture size and module dimensions by controlling parameters such as the ratio of focal length to aperture diameter, allowing adequate light gathering without excessive size increase
Solution Approach 2:
The patent applies aspherical surface design to lens elements to improve light gathering efficiency and reduce aberrations. The aspherical curvatures allow for better control of light rays across different aperture settings, enabling effective low-light performance without requiring proportionally larger aperture openings that would increase module size
3Volume of moving object
If the optical system reduces size for minimized electronic products, then portability is improved, but light intake and imaging quality deteriorate
Solution Approach 1:
The patent employs extensive parameter optimization including focal length, aperture diameter, lens spacing, and curvature radii to achieve high imaging quality in a miniaturized format. By carefully controlling the ratios and relationships between various optical parameters (e.g., focal length to module height, aperture to focal length), the design maintains excellent image quality despite reduced overall size
Solution Approach 2:
The patent utilizes aspherical surface geometry to add dimensional complexity to lens elements, enabling better aberration correction and improved image quality in a compact configuration. The aspherical surfaces provide additional degrees of freedom for controlling light paths without increasing the axial length of the optical system, effectively using geometric dimensionality to overcome size limitations
4Volume of moving object
If the optical system reduces size for minimized electronic products, then portability is improved, but light intake deteriorates
Solution Approach 1:
The patent optimizes the F-number parameter by carefully selecting the relationship between focal length and aperture diameter. The design achieves a favorable F-value that maximizes light intake relative to the compact size, using parameter ratios (such as focal length to module height) to ensure adequate illumination performance without proportionally increasing physical dimensions
Solution Approach 2:
The patent uses aspherical lens surfaces to improve the efficiency of light collection in the compact optical system. The aspherical curvatures enable better control of marginal and chief rays, reducing vignetting and improving uniformity of light distribution across the sensor, thereby maximizing light intake effectiveness within the reduced module 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
This design results in a more compact module with improved imaging quality and light intake, suitable for minimized electronic products, capable of dual-mode (visible and infrared) operation with adjusted incident angles to correct aberrations and enhance imaging performance.
Implementation Method 1
The lens group includes at least two lenses with refractive power, and is disposed on the lens base and is located in the receiving hole
Implementation Method 2
an IR-cut filter to enhance light entry and improve imaging quality
Data Source
AI summary
An optical image capturing module includes a lens assembly and a circuit assembly including a circuit substrate, a sensor holder disposed on the circuit substrate, and a surface of an image sensing component facing the circuit substrate has a plurality of image contacts. Each image contact is connected to one of the circuit contacts via a signal transmission element disposed on the image contact. The lens assembly includes a lens base disposed on the sensor holder and a lens group. The lens base has a receiving hole penetrating through two ends of the lens base and directly facing the image sensing component, thereby the lens base is hollow. The lens group is disposed on the lens base and is located in the receiving hole, so that a light could pass through the lens group and project onto a sensing surface of the image sensing component.