Five-Element Imaging Lens with Abbe Number Optimization
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Solution Overview
Problem
Existing imaging lenses with five elements compromise certain aspects of optical performance in achieving specific optical characteristics, necessitating the development of improved combinations for better image quality and compactness.
Innovation Solution
An imaging lens system comprising five lens elements with specific Abbe number differences and air gap configurations, along with an optical filter, to optimize optical performance and compactness, while ensuring proper focusing and minimizing aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If five lens elements are used with specific surface shapes to achieve specific optical characteristics, then optical performance is improved, but certain aspects of optical performance are compromised
Solution Approach 1:
The patent applies parameter changes by precisely controlling the Abbe numbers of lens elements (vd1>50, 20<vd2-vd3<40, vd4>50, vd5>50) and their relative positions. This systematic parameter optimization resolves the contradiction by achieving both improved optical characteristics (sharpness, color rendering) and maintained reliability (reduced aberrations, consistent performance) across different viewing conditions.
Solution Approach 2:
The patent uses composite material principles by combining lens elements with different Abbe numbers (high dispersion and low dispersion materials) in a five-element configuration. This composite approach allows the system to achieve superior optical performance while compensating for individual element limitations, thus resolving the contradiction between performance improvement and reliability maintenance.
2Volume of moving object
If compact lens design is pursued by reducing clear aperture diameters, then portability is improved, but image quality may be compromised
Solution Approach 1:
The patent applies dynamics by implementing variable focus capabilities through adjustable lens element positions and air gaps. This allows the compact lens system to dynamically adapt its optical properties, maintaining high image quality across different focusing distances despite the reduced clear aperture diameters, thus resolving the contradiction between compactness and image quality.
Solution Approach 2:
The patent uses parameter changes by optimizing the air gaps between lens elements (0.05mm<s1<0.15mm, 0.10mm<s2<0.30mm, etc.) and adjusting focal lengths to achieve variable focus. These parameter optimizations enable the compact design to maintain image quality by dynamically adjusting optical path parameters rather than relying solely on large aperture dimensions.
3Adaptability or versatility
If variable focus capabilities are implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the lens system into five distinct elements with specific functions (first element for initial focusing, second and third for aberration correction, fourth and fifth for final image formation). This segmented architecture enables variable focus capabilities through independent adjustment of element positions, achieving adaptability while managing complexity through functional specialization.
Solution Approach 2:
The patent implements universality by designing lens elements that perform multiple functions simultaneously. For example, the second and third elements correct both spherical and chromatic aberrations while contributing to focus adjustment. This multi-functionality reduces the need for additional dedicated components, achieving variable focus and adaptability without proportionally increasing device 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 improved optical performance, compactness, and reduced aberrations, enabling high-quality imaging with variable focus capabilities and efficient light transmission.
Implementation Method 1
first, second, third, fourth, and fifth lens elements arranged sequentially in order from an object side to an imaging side
Implementation Method 2
The object-side and imaging-side surfaces of each lens element can be coated with an anti-reflective coating
Implementation Method 3
an optical filter disposed between the fifth lens element and the imaging sensor along the optical axis
Data Source
AI summary
A five element lens system for use with an imaging sensor includes first, second, third, fourth, and fifth lens elements and an optical filter that are arranged sequentially in order from an object side to an imaging side. The lens elements are coated with an anti-reflective film. The lens system further includes an optical filter that is disposed at a distance from the imaging sensor. The lens elements are relatively positioned to each other to satisfy specific conditions. The lens elements further include thickness to diameters ratios that satisfy specific conditions. The lens system is capable of focusing images of objects located from a range of 10 cm to infinity from the lens system.