Three-Lens Imaging Optical System Aberration Correction
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Solution Overview
Problem
Conventional imaging optical systems face challenges in balancing image quality, sensitivity, aperture size, volume, and viewing angle, making it difficult to meet the diverse requirements of modern electronic devices with high-performance image sensors.
Innovation Solution
An imaging optical system comprising three lens elements with specific refractive powers and Abbe numbers, along with air gaps between them, is designed to optimize image quality and size, featuring aspheric surfaces and materials like plastic and glass to correct aberrations and reduce size while maintaining high imaging performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens elements is increased to improve image quality, then aberration correction is enhanced, but the system volume and complexity increase
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive indices, Abbe numbers, and thickness ratios of the three lens elements. Specific mathematical relationships are established between these parameters (e.g., refractive index differences, Abbe number ranges) to achieve optimal aberration correction while maintaining a compact three-element structure, thus resolving the contradiction between image quality and system volume.
2Illumination intensity
If the aperture size is increased to improve sensitivity, then light gathering capability is enhanced, but the system volume and aberration control become more difficult
Solution Approach 1:
The patent controls the aperture size and lens element parameters within specific ranges to balance light gathering capability with system compactness. By establishing mathematical relationships between the aperture diameter, focal length, and lens element dimensions, the design achieves high sensitivity while preventing excessive system volume expansion.
3Adaptability or versatility
If the viewing angle is widened to enhance field of view, then the application range is expanded, but the aberration correction and image quality maintenance become more challenging
Solution Approach 1:
The patent widens the viewing angle by optimizing the curvature radii and thicknesses of the lens elements while maintaining specific parameter relationships. The design establishes mathematical constraints on the lens element geometries that enable a wider field of view while preserving image quality through controlled aberrations via the aspheric surfaces and material selection.
4Manufacturing precision
If aspheric surfaces and multiple materials are used to correct aberrations, then image quality is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent balances aberration correction with manufacturing feasibility by selecting specific refractive index ranges and Abbe number ranges for the lens materials. The aspheric surface parameters are optimized within practical manufacturing tolerances, and the thickness ratios are constrained to facilitate assembly. This approach achieves high image quality while maintaining reasonable manufacturing complexity.
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
The system achieves a balance between image quality and size, correcting aberrations and reducing the size of the imaging optical system while maintaining high performance, thus addressing the limitations of conventional systems.
Implementation Method 1
The first lens element has a positive refractive power, the second lens element has a negative refractive power, and the third lens element has a positive refractive power
Data Source
AI summary
An imaging optical system includes three lens elements. The three lens elements, in order from an object side to an image side, are a first lens element having an object-side surface facing the object side and an image-side surface facing the image side, a second lens element having an object-side surface facing the object side and an image-side surface facing the image side, and a third lens element having an object-side surface facing the object side and an image-side surface facing the image side. The third lens element has positive refractive power, the imaging optical system has a total of three lens elements, and there are air gaps between paraxial regions of the first lens element, the second lens element and the third lens element.