Six-Lens Optical System for High-Pixel Low-Light Imaging
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Solution Overview
Problem
Traditional optical image capturing systems in portable electronic devices fail to meet the requirements for higher pixel counts and larger apertures, particularly for micro filming and night viewing, due to limitations in increasing incoming light and improving imaging quality.
Innovation Solution
The use of a six-piece optical image capturing system with specific refractive powers, convex and concave surfaces, and inflection points on lens elements to enhance light intake and correct optical distortions, optimizing lens parameters such as focal lengths, entrance pupil diameters, and aberration corrections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional four-lens or five-lens design is used, then device complexity is reduced, but imaging quality and light intake are insufficient for high-pixel and low-light conditions
Solution Approach 1:
The optical system is divided into six separate lens elements with specific refractive powers and surface configurations. Each lens element contributes to correcting specific optical aberrations, allowing the system to achieve superior imaging quality by segmenting the optical function across multiple specialized components rather than using fewer general-purpose elements.
Solution Approach 2:
Different lens elements are designed with specific local characteristics: the first lens element has positive refractive power with convex object-side and concave image-side surfaces, while the sixth lens element has negative refractive power with concave object-side and convex image-side surfaces. Each element's surfaces are optimized for specific functions such as correcting spherical aberration, coma, or field curvature, achieving local optimization that contributes to overall system performance.
2Illumination intensity
If aperture size is increased to improve light intake, then low-light imaging performance is improved, but device size and complexity increase
Solution Approach 1:
The system achieves improved light intake by optimizing specific parameters of the six lens elements including their refractive powers, surface curvatures, and relative positions. By carefully controlling parameters such as the focal length ratio between positive and negative elements and the spacing between elements, the system maximizes light transmission efficiency without requiring a physically larger aperture or more complex optical structures.
3Quantity of substance
If pixel size is minimized to increase pixel count, then high-pixel functionality is achieved, but light intake per pixel decreases
Solution Approach 1:
The six-lens element configuration segments the optical function to control light distribution across the image sensor array. This segmentation allows for optimized light paths that ensure adequate illumination even when pixels are minimized in size, by controlling aberrations and improving overall optical efficiency rather than relying on larger individual pixel areas.
Solution Approach 2:
Specific lens elements are designed with local surface characteristics optimized for high-pixel applications. The aspheric surfaces and specific curvature configurations of individual elements are tailored to maintain uniform illumination distribution across densely packed pixels, compensating for the reduced light gathering area of each individual pixel through optimized optical path control.
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 significantly improves imaging quality by increasing light intake and correcting optical distortions, enabling better performance in high-pixel and low-light conditions, suitable for miniaturized electronic devices.
Implementation Method 1
an object-side surface and an image-side surface of the first lens element are aspheric... Focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5 and f6 respectively
Data Source
AI summary
A six-piece optical lens for capturing image and a six-piece optical module for capturing image are provided. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with refractive power, a second lens with refractive power, a third lens with refractive power, a fourth lens with refractive power, a fifth lens with refractive power and a sixth lens with refractive power. At least one of the image-side surface and object-side surface of each of the six lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.