Optical Lens System Abbe Number Optimization
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Solution Overview
Problem
Existing optical lenses with two lenses fail to meet the requirements of being light, thin, small in size, and wide in viewing angle while maintaining high image quality, especially when matched with high-pixel photosensitive elements, leading to suboptimal image capture performance.
Innovation Solution
The optical lens design includes a sequence of lenses with specific refractive powers and Abbe numbers, featuring a first lens with negative refractive power, a second lens with refractive power, a third biconvex lens with a defined Abbe number range, a cemented lens, and a fourth biconvex lens with another defined Abbe number range, optimizing the lens configuration for reduced size and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only two lenses are used in the optical lens, then the device complexity is reduced, but the image quality and pixel resolution deteriorate
Solution Approach 1:
The optical lens is divided into five distinct lens elements (first lens, second lens, third lens, cemented lens, and fourth lens) with specific refractive power configurations. This segmentation allows each lens element to contribute differently to the overall optical performance, enabling high image quality and pixel resolution while maintaining a compact structure suitable for mobile devices.
2Length of moving object
If the optical lens is made compact with reduced length, then the portability is improved, but the viewing angle and image quality deteriorate
Solution Approach 1:
The patent employs specific parameter configurations including the Abbe numbers of the third lens (15≤Vd3≤30) and fourth lens (60≤Vd4≤85), along with controlled focal lengths and curvature radii. These parameter optimizations enable the compact optical lens to achieve a wide viewing angle (≥70 degrees) and excellent image quality despite its reduced length, resolving the contradiction between compactness and optical performance.
3Manufacturing precision
If more lens elements are added to improve image quality, then the pixel resolution is improved, but the size and weight of the optical lens increase
Solution Approach 1:
The patent merges multiple lens elements into a compact arrangement where the third lens and fourth lens are positioned in close proximity with controlled air gaps. The cemented lens combines two elements with different refractive powers to achieve chromatic aberration correction. This merging strategy allows five lens elements to be integrated into a compact form factor while maintaining high pixel resolution and image 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
This configuration results in an optical lens that is compact, offers excellent image quality, and provides a wide viewing angle, effectively addressing the limitations of prior art by enhancing the optical performance and pixel resolution within cost constraints.
Implementation Method 1
a first lens having negative refractive power, a second lens having negative refractive power, a third lens having refractive power and having an Abbe number Vd3, a cemented lens having refractive power, and a fourth lens having refractive power and having an Abbe number Vd4
Data Source
AI summary
An optical lens is provided. The optical lens includes, in order from an object side to an image-forming side, a first lens having negative refractive power, a second lens having negative refractive power, a third lens having refractive power and having an Abbe number Vd3, a cemented lens having refractive power, and a fourth lens having refractive power and having an Abbe number Vd4, wherein 15≤Vd3 and/or Vd3≤30, and 60≤Vd4 and/or Vd4≤85.