Six-Lens Optical System with Aspheric Inflection Points
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Solution Overview
Problem
Conventional optical systems face challenges in achieving a balance between high image quality, low sensitivity, desirable aperture size, miniaturization, and field of view requirements, particularly in applications like photography and 3D image capturing.
Innovation Solution
The optical system comprises six lens elements, with at least three being aspheric and having inflection points, and Abbe numbers smaller than 33.0, arranged to satisfy specific conditions for focal lengths, curvature radii, and thickness ratios to optimize image quality and miniaturization while maintaining a wide field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical systems are used to achieve high image quality, then image quality is improved, but the system size and sensitivity cannot be optimized simultaneously
Solution Approach 1:
The patent employs aspheric surfaces on multiple lens elements (first through sixth lens elements) with specific curvature radii relationships (e.g., R1>0, R2<0, R3<0, R4>0, R5>0, R6<0) to correct optical aberrations and improve image quality while maintaining a compact system form factor. The aspheric coefficients are optimized to achieve high image quality without increasing system size.
Solution Approach 2:
The patent specifies precise parameter ranges for lens elements including focal lengths (f1, f2, f3, f4, f5, f6), curvature radii (R1, R2, R3, R4, R5, R6), and thickness ratios (e.g., 0.25<(CT2+CT4+CT5)/(CT1+CT3+CT6)<1.50) to simultaneously achieve high image quality and compact dimensions. These parameter optimizations resolve the contradiction between image quality and system size.
2Use of energy by moving object
If the aperture size is increased to improve light gathering, then light gathering capability is improved, but the system becomes more sensitive and larger
Solution Approach 1:
The patent optimizes the aperture ratio (Fno) and focal length relationships to achieve desirable light gathering capability while controlling sensitivity. The specified parameter ranges for focal lengths and aperture configurations allow the system to balance light gathering with reduced sensitivity to external light conditions.
3Device complexity
If miniaturization is pursued to reduce system size, then system size is reduced, but image quality and field of view are compromised
Solution Approach 1:
The patent uses aspheric surfaces on six lens elements with optimized curvature radii to correct aberrations in a miniaturized system. The aspheric design allows compact lens element dimensions while maintaining image quality that would otherwise require larger conventional spherical lenses.
Solution Approach 2:
The patent specifies optimized parameter ranges including thickness ratios (0.25<(CT2+CT4+CT5)/(CT1+CT3+CT6)<1.50) and focal length relationships that enable miniaturization while preserving image quality and achieving a wide field of view (38.0°<HFOV<65.0°).
4Adaptability or versatility
If the field of view is increased to capture wider scenes, then field of view is improved, but optical aberrations increase and image quality deteriorates
Solution Approach 1:
The patent employs aspheric surfaces on multiple lens elements with specific curvature relationships to correct off-axis aberrations that typically plague wide-field optical systems. The aspheric design enables a wide half-field of view (38.0°<HFOV<65.0°) while maintaining high image quality across the entire field.
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 enhances image quality, corrects aberrations, and reduces the size of the optical system, making it suitable for various applications including infrared photography and 3D image capturing.
Implementation Method 1
Each of at least three lens surfaces of the six lens elements is aspheric and has at least one inflection point
Implementation Method 2
Each of at least five lens elements of the six lens elements has an Abbe number smaller than 33.0
Data Source
AI summary
An electronic device includes an optical system. The optical system includes six lens elements, and the six lens elements are, in order from an outer side to an inner side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each of the six lens elements has an outer-side surface facing toward the outer side and an inner-side surface facing toward the inner side. Each of at least three lens surfaces of the six lens elements is aspheric and has at least one inflection point.