Five-Lens Optical System with Inflection Points for Compact Imaging
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Solution Overview
Problem
Conventional optical systems in portable electronic devices face challenges in capturing high-quality images in low-light environments due to limited light intake and aberration issues, particularly in designs with three or four lenses.
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 inflection points to optimize light entry and correct aberrations, enhancing imaging quality and light intake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lenses is increased to improve imaging quality, then imaging quality is improved, but device complexity increases
Solution Approach 1:
The optical system is divided into five distinct lens elements, each with specific refractive powers and surface characteristics. This segmentation allows each lens to contribute to correcting specific aberrations while collectively achieving high imaging quality. The patent specifies that these five lenses work together to correct various optical aberrations that would be difficult to correct with fewer elements.
Solution Approach 2:
Each lens element is designed with specific local characteristics including convex or concave surfaces and inflection points at predetermined positions. These local quality variations enable each lens to address specific aberration types while maintaining overall system performance. The patent details specific surface curvatures and inflection point positions for each lens to optimize local light correction.
2Illumination intensity
If the aperture is enlarged to increase light intake, then light intake is improved, but aberration increases
Solution Approach 1:
The patent specifies precise parameter ranges for each lens element including refractive power, surface curvature, and inflection point positions. These parameter changes are optimized to maintain aberration control while allowing for larger aperture designs. The fifth lens specifically has its inflection point positioned to correct aberrations that would otherwise worsen with larger apertures.
Solution Approach 2:
The five-lens configuration acts as an intermediary system between the large aperture and the image sensor. Each lens element mediates the light path to correct aberrations introduced by the large aperture while preserving the increased light intake. The specific arrangement of convex and concave surfaces in each lens serves as an intermediary correction mechanism.
3Volume of moving object
If the system size is reduced for compact devices, then device compactness is improved, but light intake decreases
Solution Approach 1:
The patent utilizes the inflection point position on each lens surface as an additional design dimension to optimize performance. By controlling the position of inflection points and surface curvatures in the radial dimension, the system achieves effective aberration correction in a compact axial dimension. This allows maintaining light intake capability while reducing overall system size.
Solution Approach 2:
The patent specifies optimized parameter ranges for lens thickness, spacing between lenses, and surface curvatures that enable compact form factor. The fifth lens inflection point position is specifically controlled to maintain aberration correction performance while allowing reduced system dimensions. These parameter changes enable the system to achieve both compactness and adequate light intake.
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, correcting aberrations while maintaining a compact size suitable for minimized electronic devices.
Implementation Method 1
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.