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 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, optimized lens parameters, and an IR-cut filter to reduce size and enhance light intake, improving imaging quality and pixel density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical system uses conventional lens design with 5 or 6 lenses, then high optical performance is achieved, but the device size is large
Solution Approach 1:
The patent divides the optical system into multiple lenses with different functions (first lens with positive power, second lens with negative power, third lens with positive power, etc.). Each lens is optimized for specific aberration correction, allowing the system to achieve high optical performance while reducing the total number of lenses needed compared to conventional designs.
Solution Approach 2:
The patent applies different surface characteristics to different regions of the lenses. Specifically, the object-side surface of the first lens and the image-side surface of the second lens are designed as aspheric surfaces, while other surfaces may be spherical or aspheric. This localized application of aspheric surfaces optimizes aberration correction where needed without increasing overall system complexity or size.
2Illumination intensity
If the aperture is increased to take more light in dark environment, then light intake is improved, but the device size increases
Solution Approach 1:
The patent employs aspheric surfaces on key lens elements (object-side surface of the first lens and image-side surface of the second lens) to optimize light gathering efficiency. The aspheric curvature allows for better control of light rays across the aperture, enabling the system to maintain high light intake capability without requiring an excessively large aperture diameter that would increase device size.
Solution Approach 2:
The patent optimizes specific parameter ratios including the focal length to entrance pupil diameter ratio (f/HEP) constrained between 1.0 and 10.0, and the half maximum field angle (HAF) between 0 and 150 degrees. These parameter optimizations allow the system to achieve efficient light gathering with a compact aperture size, preventing device size increase while maintaining improved light intake for dark environment photography.
3Measurement precision
If the pixel density is increased for high imaging quality, then imaging quality is improved, but the device size increases
Solution Approach 1:
The patent segments the optical path into multiple lenses with specific refractive power distributions. The first lens (positive power), second lens (negative power), and third lens (positive power) work together to control aberrations, allowing light to be focused more precisely on the image sensor. This enables higher pixel density to be effectively utilized without requiring a larger device, as the optical system can resolve finer details and support higher resolution sensors.
Solution Approach 2:
The patent applies aspheric surfaces locally to specific lens elements to correct aberrations that would otherwise limit the effectiveness of high pixel density sensors. The aspheric object-side surface of the first lens and image-side surface of the second lens provide precise control over light ray paths, enabling the system to maintain high imaging quality with compact dimensions that accommodate high-resolution sensors without increasing overall device 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 allows for better light entry and improved imaging quality, enabling higher pixel density and better performance in low-light conditions, suitable for compact electronic devices.
Implementation Method 1
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
Implementation Method 2
an IR-cut filter, wherein the IR-cut filter is disposed on the lens base and is located between the lens group and the image sensing component
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 located in a receiving hole. The circuit substrate has a plurality of circuit contacts. The image sensing component has a first surface facing the circuit substrate and having a plurality of image contacts and a second surface having a sensing surface. Each image contact is 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 including at least two lenses having refractive power. The lens base is made of an opaque material and has the receiving hole penetrating through two ends thereof, thereby the lens base is hollow. The lens group is disposed on the lens base and is located in the receiving hole.