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 aberrations, particularly in compact designs with few lenses.
Innovation Solution
A compact optical image capturing system utilizing a combination of five-piece optical lenses with refractive powers, convex and concave surfaces, and inflection points to adjust incident angles and correct aberrations, enhancing light intake and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lenses is increased to improve image quality and reduce aberrations, then imaging quality is improved, but device complexity and size increase
Solution Approach 1:
The optical system is divided into five distinct lens elements, each with specific refractive powers and surface profiles. This segmentation allows each lens to contribute to correcting specific aberrations while collectively achieving high imaging quality. The patent specifies that at least one lens should have an inflection point on its surface to effectively control aberrations.
Solution Approach 2:
Different regions of the lens surfaces are designed with different properties through the use of inflection points and aspheric profiles. This allows specific areas of the lens to correct specific types of aberrations, optimizing the overall imaging performance while maintaining a manageable number of lens elements.
2Illumination intensity
If the aperture is enlarged to increase light intake for dark environment photography, then light intake is improved, but aberrations and imaging quality deteriorate
Solution Approach 1:
The patent optimizes parameters such as the inflection point position, surface curvature, and refractive power of each lens element to maintain high imaging quality even with larger aperture settings. By carefully controlling these parameters, the system can maximize light intake while minimizing aberrations.
Solution Approach 2:
The use of aspheric surfaces with inflection points allows for better control of light rays passing through the lens, reducing spherical aberration and other optical defects that typically worsen with larger apertures. This enables the system to maintain image quality across a range of aperture settings.
3Volume of moving object
If the system is compacted to minimize device size, then device size is reduced, but light intake and imaging quality deteriorate
Solution Approach 1:
The five lens elements are arranged in a compact configuration where each lens is positioned closely to the others along the optical axis. This nested arrangement minimizes the overall length and volume of the optical system while maintaining the necessary spacing for effective aberration correction and light transmission.
Solution Approach 2:
By optimizing parameters such as the inflection point position and surface profiles of each lens, the patent achieves effective aberration correction in a compact form factor. This allows the system to maintain good imaging quality and light intake capabilities despite the reduced size.
4Volume of moving object
If the system is compacted to minimize device size, then device size is reduced, but imaging quality and aberration control deteriorate
Solution Approach 1:
The optical system is divided into five lens elements with specific refractive powers and surface profiles, allowing each element to contribute to aberration correction. This segmentation enables effective control of imaging quality even in a compact configuration where lens spacing is minimized.
Solution Approach 2:
Different regions of the lens surfaces are designed with different properties through inflection points and aspheric profiles, allowing specific areas to correct specific types of aberrations. This local optimization maintains high imaging quality despite the compact overall system size.
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 by optimizing lens parameters and surface profiles, reducing aberrations and size while maintaining compactness.
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 power. The fifth lens can have negative refractive power, 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.