Five-Lens Optical System with Aspheric Lenses for Low-Light Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical systems in portable electronic devices struggle to achieve high optical performance, particularly in low-light environments, due to limitations in light intake and image quality.
Innovation Solution
A compact optical image capturing system utilizing a combination of five-piece optical lenses with specific refractive powers, convex and concave surfaces, and an engaging component design to enhance light intake and imaging quality, while maintaining a minimized form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture is increased to improve light intake for dark environment photography, then the amount of light entering the lens increases, but the device size and complexity increase
Solution Approach 1:
The patent combines multiple lenses (first lens with negative refractive power, second lens with positive refractive power, and third lens with positive refractive power) into a single integrated optical system. This merging of multiple optical elements allows the system to achieve high light intake equivalent to a large aperture while maintaining a compact structure that does not increase device complexity
Solution Approach 2:
The patent changes the refractive power parameters of the lenses, specifically making the first lens have negative refractive power while the second and third lenses have positive refractive power. This parameter configuration enables the system to optimize light gathering capability without requiring a physically large aperture, thus improving light intake without increasing device size or complexity
2Manufacturing precision
If more lenses are added to improve imaging quality, then the optical performance increases, but the device size and manufacturing complexity increase
Solution Approach 1:
The patent assigns different local qualities to different lenses in the system. The first lens has negative refractive power optimized for light gathering, while the second and third lenses have positive refractive power optimized for image formation. This localized optimization of each lens's properties achieves high imaging quality without needing to add excessive numbers of lenses
Solution Approach 2:
Each lens in the three-lens system performs multiple functions. The first lens with negative refractive power not only gathers light but also helps control aberrations. The second and third lenses with positive refractive power both contribute to image formation and aberration correction. This multi-functionality of each lens component achieves high imaging quality with minimal lens count, avoiding increased device complexity
3Volume of moving object
If the number of lenses is reduced to minimize device size, then the device becomes more compact, but the light intake and imaging quality deteriorate
Solution Approach 1:
The patent uses specific refractive power parameters (first lens: negative, second and third lenses: positive) to maximize the light-gathering efficiency of each lens. This parameter optimization allows the compact three-lens system to achieve light intake performance comparable to larger systems with more lenses, thus maintaining small device size while preserving light intake capability
Solution Approach 2:
The patent employs aspheric surfaces on the lenses, particularly utilizing convex and concave surface curvatures optimized for light gathering and image formation. This curved surface design increases the effective light gathering area of each lens without increasing the physical size of the lens elements, enabling the compact system to maintain high light intake performance
4Volume of moving object
If the number of lenses is reduced to minimize device size, then the device becomes more compact, but the imaging quality deteriorates
Solution Approach 1:
The patent optimizes each lens's local properties - the first lens with negative refractive power is designed specifically for light gathering with controlled aberrations, while the second and third lenses with positive refractive power are optimized for image formation. This localized quality optimization ensures high imaging quality in each component, achieving overall excellent imaging performance in the compact three-lens system
Solution Approach 2:
The patent carefully selects and optimizes the refractive power parameters of each lens (negative for first lens, positive for second and third lenses) to balance light gathering and image formation functions. This parameter optimization allows the compact system to achieve imaging quality comparable to larger systems, maintaining small device size while preserving imaging quality
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 and improves imaging quality, addressing the limitations of conventional systems by optimizing lens parameters and assembly precision, resulting in enhanced performance in low-light conditions.
Implementation Method 1
Optical image capturing system includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in order along an optical axis from an object side to an image side
Data Source
AI summary
An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. At least one lens among the first to the fifth lenses has positive refractive force. The fifth lens can have negative refractive force, wherein both surfaces thereof are aspheric, and at least one surface thereof has an inflection point. The lenses in the optical image capturing system which have refractive power include the first to the fifth lenses. The optical image capturing system can increase aperture value and improve the imaging quality for use in compact cameras.