Five-Element Aspheric Lens System for Smartphone Aberration Control
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Solution Overview
Problem
Conventional compact optical systems for portable electronic devices, such as smartphones and tablets, fail to meet the demands for high resolution and image quality due to excessive aberration and limited field of view, especially with five-element lens structures, which also complicate moldability and photosensitivity adjustments.
Innovation Solution
A photographing lens system comprising five non-cemented lens elements with specific refractive powers and surface shapes, including convex and concave aspheric surfaces, arranged to minimize aberration and enhance image quality, with air spaces between elements to improve manufacturing and image capture efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional five-element lens structure is used to enhance image quality and resolution, then image quality is improved, but excessive aberration occurs and the field of view cannot be expanded
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive power distribution across the five lens elements and specifying particular curvature radius relationships (R1/R2, R3/R4, R5/R6) to reduce aberration while maintaining image quality. The aspheric surface parameters are also adjusted to control light propagation and minimize optical distortions
Solution Approach 2:
The patent utilizes aspheric surfaces on multiple lens elements (first, third, fourth, and fifth elements) to replace traditional spherical surfaces. This curvature modification enables better control over light rays, reducing spherical aberration and coma while expanding the effective field of view without compromising image quality
2Manufacturing precision
If a conventional five-element lens structure is used to enhance image quality, then image quality is improved, but moldability and photosensitivity adjustments become complicated
Solution Approach 1:
The patent divides the optical system into five separate lens elements with air spaces between them, allowing each element to be manufactured and adjusted independently. This segmentation enables flexible moldability adjustments for each lens element without affecting the entire system, simplifying the manufacturing process while maintaining high image quality
3Volume of moving object
If a compact optical system is designed for portable devices, then device size is reduced, but image quality and resolution are compromised
Solution Approach 1:
The patent employs a nested arrangement where the five lens elements are closely integrated with minimal air spaces, and the stop is positioned within the lens assembly. This nesting approach compactes the optical system for portable devices while maintaining the complex five-element structure necessary for high image quality and resolution
4Ease of manufacture
If a conventional optical system is used, then manufacturing is simpler, but excessive aberration and limited field of view result
Solution Approach 1:
The patent introduces aspheric surfaces on the first, third, fourth, and fifth lens elements to correct aberrations that cannot be addressed by conventional spherical surfaces. These aspheric profiles are integrated into the manufacturing process, providing aberration control without significantly complicating production
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 solution provides a compact lens system with improved image quality, reduced aberration, and increased field of view, while simplifying manufacturing by using non-cemented lenses and optimizing refractive power distribution, thus addressing the limitations of conventional systems.
Implementation Method 1
a first lens element (110), a second lens element (120), a third lens element (130), a fourth lens element (140) and a fifth lens element (150... The photographing lens system has a total of five lens elements with refractive power...)
Data Source
AI summary
A photographing lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with refractive power has a convex object-side surface. The second lens element has refractive power. The third lens element with refractive power has a convex object-side surface and a concave image-side surface. The fourth lens element with refractive power has an object-side surface and an image-side surface being both aspheric. The fifth lens element with refractive power has a concave image-side surface, wherein an object-side surface and the image-side surface thereof are aspheric, and the image-side surface of the fifth lens element has at least one convex shape in an off-axial region thereof. The photographing lens system has a total of five lens elements with refractive power.