Ultra-Wide Optical System Minimizing Perspective Distortion
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Solution Overview
Problem
Current optical camera lenses for cars and conferences suffer from large perspective distortion, low resolution, insufficient field angle, and other limitations, leading to asymmetric image deformations and poor image quality.
Innovation Solution
An optical system comprising a specific arrangement of meniscus and biconvex aspherical lenses, including both plastic and glass elements, is designed to minimize perspective distortion and enhance the ultra-wide viewing angle, featuring oblate and hyperbolic aspherical surfaces to correct aberrations and maintain image clarity across the field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional optical lens is used to achieve a wide field angle, then the viewing angle is improved, but perspective distortion increases
Solution Approach 1:
The optical system is divided into multiple lens elements (first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens) with different shapes and refractive properties. Each lens segment contributes to correcting specific aberrations, collectively achieving both wide field angle and minimal perspective distortion.
Solution Approach 2:
Different regions of the optical system have different lens characteristics. The patent specifies different shapes (meniscus, biconvex), materials (optical plastic, optical glass), and refractive indices for different lens elements, allowing each region to optimize for local aberration correction while contributing to the overall wide field angle capability.
2Adaptability or versatility
If the field angle is increased to capture more scene, then the coverage area is improved, but image resolution decreases
Solution Approach 1:
The patent optimizes multiple parameters including the shapes of lens surfaces (aspherical, hyperbolic, oblate), refractive indices of lens materials, and the arrangement of lens elements. These parameter changes enable the system to maintain high image resolution across the entire field angle, preventing the typical resolution degradation that occurs with wider fields.
3Shape
If aspherical surfaces are used to correct distortion, then perspective distortion is reduced, but manufacturing complexity increases
Solution Approach 1:
The optical system combines different lens materials (optical plastic and optical glass) with different refractive indices and dispersion characteristics. This composite approach allows the system to achieve superior distortion correction through material properties while using standard lens manufacturing processes, balancing performance with manufacturability.
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 optical system achieves a large field angle with minimal distortion, high resolution, and low cost, maintaining image quality across varying temperatures and environments, while preventing asymmetric deformations and ensuring a well-distributed, bright image.
Implementation Method 1
an optical system with small-perspective distortion and an ultra-wide angle... a first lens; a second lens; a third lens; an aperture; a fourth lens; a fifth lens; a sixth lens; a seventh lens
Data Source
AI summary
An optical system, including, sequentially from an object side to an image side: a first lens; a second lens; a third lens; an aperture; a fourth lens; a fifth lens; a sixth lens; a seventh lens; an optical filter; and a photosensitive chip. The first lens is a meniscus aspherical lens. The second lens is a meniscus aspherical lens. The third lens is a biconvex aspherical lens. The fourth lens is a meniscus aspherical lens. The fifth lens is a meniscus spherical lens. The sixth lens is a meniscus spherical lens. The seventh lens is a biconvex aspherical lens.