Five-Lens Optical System with Aspheric Surfaces for Low-Light Imaging
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Solution Overview
Problem
Conventional optical systems in portable electronic devices struggle to provide high optical performance, especially 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 refractive powers and aspheric surfaces in five-piece optical lenses to increase light intake and improve imaging quality, with specific lens parameters and configurations that optimize light path modification and aberration correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional optical systems with three or four lenses are used, then the device complexity is reduced, but the light intake and imaging quality deteriorate in low-light environments
Solution Approach 1:
The patent combines five lenses with specific refractive power configurations (−+++−, ++++−, −+−−+, +−++−, or +−+++) into a unified optical system. This merging of multiple lenses with complementary optical properties enables enhanced light intake and improved imaging quality while maintaining a compact structure suitable for portable devices.
2Illumination intensity
If the aperture is increased to improve light intake, then the illumination intensity improves, but the device size and complexity increase
Solution Approach 1:
The patent optimizes the refractive powers and surface curvatures of the five lenses to achieve high light intake efficiency. By carefully selecting the refractive power combinations (−+++−, ++++−, −+−−+, +−++−, or +−+++) and optimizing parameters such as focal lengths and surface profiles, the system achieves large effective aperture performance without proportionally increasing the physical device size.
3Manufacturing precision
If more lenses are added to improve imaging quality, then the image quality improves, but the device complexity and length increase
Solution Approach 1:
The patent employs aspheric surfaces on the lenses to correct optical aberrations and improve imaging quality. The aspheric profiles enable better control of light paths through the five-lens system, achieving high image quality while maintaining a compact optical path length that is suitable for portable electronic devices.
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
Enhances light intake and image quality, achieving better performance in low-light conditions while maintaining a compact form factor suitable for portable devices.
Implementation Method 1
an optical image capturing system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an image sensor in order from an object side to an image side along an optical axis
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.