Optical Image Capturing Module with Hollow Lens Base
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Solution Overview
Problem
Conventional optical image capturing systems in portable electronic devices face challenges in reducing 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, optimized parameters such as lens thickness, entrance pupil diameter, and profile curve lengths to minimize 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 lens design with five or six lenses, then high optical performance and large aperture are achieved, but the size of the optical image capturing module is large
Solution Approach 1:
The patent divides the optical system into multiple lenses with different refractive powers (positive and negative). By segmenting the optical function across multiple elements rather than using a single large lens, the system achieves high optical performance while reducing the overall module size. Specifically, the patent uses a combination of lenses including at least one positive lens and one negative lens, where each lens contributes to the overall optical performance while the negative lens helps reduce the total track length.
Solution Approach 2:
The patent employs a compact nested arrangement where lenses are positioned closely together in sequence along the optical axis. The lens holder structure allows for compact nesting of multiple lens elements, with each lens positioned at optimized distances from the image sensor. This nested configuration enables the system to achieve high optical performance with a reduced overall module size compared to conventional spaced arrangements.
2Illumination intensity
If the optical system is designed for dark environment photography, then large aperture is required to increase light intake, but the module size increases
Solution Approach 1:
The patent optimizes key optical parameters including the focal length (f), entrance pupil diameter (HEP), and the ratio f/HEP to achieve high light intake in a compact form. The patent specifically controls parameters such as 1.0≤f/HEP≤10.0 and optimizes the profile curve lengths of lens surfaces. By carefully adjusting these parameters, the system achieves large effective aperture for dark environment photography while maintaining a small module size through compact lens positioning and optimized optical paths.
3Volume of moving object
If the module size is reduced, then the quantity of light entering the lens is reduced, but high imaging quality is required
Solution Approach 1:
The patent employs aspheric lens surfaces with dynamically optimized profile curves to maximize light gathering efficiency in a compact design. The aspheric surfaces are designed with specific profile curve lengths (ARE) that optimize light ray paths, allowing the system to capture more light within a reduced module size. The patent controls the ratio ARE/TP (profile curve length to lens thickness) to ensure optimal light intake while maintaining compact dimensions.
Solution Approach 2:
The patent uses a combination of lens materials with different refractive indices and Abbe numbers to optimize light transmission and reduce chromatic aberration in the compact design. By selecting appropriate material combinations, the system maintains high light intake capability and imaging quality despite the reduced module size, as different materials complement each other in transmitting and focusing light efficiently.
4Manufacturing precision
If high imaging quality and increased pixels are required, then larger aperture and better light entering are needed, but the module size increases
Solution Approach 1:
The patent extensively uses aspheric lens surfaces with precisely controlled profile curves to achieve high imaging quality in a compact design. The aspheric surfaces (described by equations with higher-order terms A4, A6, A8, etc.) enable better correction of optical aberrations compared to simple spherical surfaces, allowing high pixel density and excellent image quality within a reduced module size. The profile curve length optimization ensures that light rays are properly focused across the entire image sensor area.
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 effectively reduces the size of the optical image capturing module while improving light intake and imaging quality, enabling high-resolution imaging in compact electronic devices, including those used in dark environments.
Implementation Method 1
The lens group includes a first lens (110) having negative refractive power, a second lens (120) having positive refractive power, a third lens (130) having negative refractive power, a fourth lens (140) having positive refractive power, a fifth lens (150) having positive refractive power, and a sixth lens (160) having negative refractive power
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 connected to the circuit substrate. The circuit substrate has a plurality of circuit contacts. The image sensing component has a sensing surface and a plurality of image contacts. Each image contact is electrically connected to one of the circuit contacts via a plurality of signal transmission elements. The lens assembly includes a lens base disposed on the circuit substrate and a lens group. The lens base is made of an opaque material and has a receiving hole penetrating through two ends of the lens base, thereby the lens base is hollow. The image sensing component is located in the receiving hole. The lens group includes at least two lenses having refractive power, and is disposed on the lens base and is located in the receiving hole.