Five-Lens Optical System with Aspheric Surfaces for Aberration Control
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Solution Overview
Problem
Conventional optical systems for portable electronic devices face challenges in achieving high imaging quality, large aperture, and wide-angle capabilities while minimizing size and aberrations, particularly in low-light environments.
Innovation Solution
A compact optical image capturing system utilizing a five-piece optical lens configuration with aspheric surfaces and refractive powers, including a fifth lens with inflection points to adjust incident angles and modify aberrations, enhancing light entry and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture of the optical system is increased to take pictures in dark environments, then the light intake is improved, but the aberration increases and image quality at periphery deteriorates
Solution Approach 1:
The optical system is divided into five separate lens elements instead of using a single lens or fewer elements. Each lens element contributes to controlling the light path and correcting specific types of aberrations, allowing the system to maintain large aperture while preserving peripheral image quality through distributed optical correction functions.
Solution Approach 2:
Different lens elements are designed with specific local optical properties - some with positive refractive power and others with negative refractive power. The aspheric surfaces of each lens element are optimized to correct specific aberrations in their respective zones, allowing localized correction of optical defects while maintaining overall system performance.
2Illumination intensity
If the aperture of the optical system is increased to take pictures in dark environments, then the light intake is improved, but the aberration increases
Solution Approach 1:
The optical system is divided into five separate lens elements instead of using a single lens or fewer elements. Each lens element contributes to controlling the light path and correcting specific types of aberrations, allowing the system to maintain large aperture while preserving peripheral image quality through distributed optical correction functions.
Solution Approach 2:
The lens elements utilize aspheric surfaces instead of traditional spherical surfaces, fundamentally changing the geometric parameters of the optical components. This parameter change allows for better control of light rays across the entire aperture, reducing spherical aberration and other optical defects while maintaining the desired large aperture for low-light photography.
3Adaptability or versatility
If a wide-angle optical system is designed to increase the angle of field, then the view angle is improved, but the distortion increases
Solution Approach 1:
The wide-angle optical system is divided into five lens elements with alternating positive and negative refractive powers. This segmentation allows each element to contribute to expanding the field of view while collectively managing and correcting the distortion that naturally occurs in wide-angle designs, distributing the angular coverage across multiple optical components.
Solution Approach 2:
Different lens elements are designed with specific local optical properties - some with positive refractive power and others with negative refractive power. The aspheric surfaces of each lens element are optimized to correct specific aberrations in their respective zones, allowing localized correction of optical defects while maintaining overall system performance.
4Volume of moving object
If the optical system is designed to be compact for minimized electronic products, then the size is reduced, but the optical performance may deteriorate
Solution Approach 1:
The optical system employs aspheric surfaces on the lens elements, which provide dynamic control over the light paths compared to traditional spherical surfaces. This dynamic geometric control allows the system to achieve high optical performance in a compact configuration by precisely directing light rays through the reduced optical path length without sacrificing image quality.
Solution Approach 2:
The lens elements utilize aspheric surfaces instead of traditional spherical surfaces, fundamentally changing the geometric parameters of the optical components. This parameter change allows for better control of light rays across the entire aperture, reducing spherical aberration and other optical defects while maintaining the desired large aperture for low-light photography.
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 effectively increases light intake, improves imaging quality, and reduces aberrations, enabling high-resolution image capture in compact devices with improved optical performance and reduced size.
Implementation Method 1
A compact optical image capturing system utilizing a five-piece optical lens configuration with aspheric surfaces and refractive powers
Data Source
AI summary
A five-piece optical lens for capturing image and a five-piece optical module for capturing image, along the optical axis in order from an object side to an image side, include a first lens with positive refractive power having a convex object-side surface; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; and a fifth lens with negative refractive power; and at least one of the image-side surface and object-side surface of each of the five lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.