Six-Lens Aspheric Optical Assembly for Compact Mobile Imaging
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Solution Overview
Problem
Conventional optical systems for mobile devices are bulky and costly due to their large size and complex manufacturing processes, failing to meet the demands for compact, high-quality imaging solutions with multiple functions.
Innovation Solution
A compact imaging optical lens assembly comprising six non-cemented lens elements with specific refractive powers and aspheric surfaces, along with an air gap between elements and an aperture stop without refractive power, optimized to reduce size, correct aberrations, and enhance image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple spherical glass lens elements are used in conventional telephoto optical systems, then the manufacturing precision and image quality can be maintained, but the device size becomes too large and manufacturing cost becomes too high
Solution Approach 1:
The patent divides the optical system into multiple discrete lens elements (first through sixth lens elements) with specific refractive powers and aspheric surfaces. Each lens element is independently designed and positioned with controlled air gaps, allowing the system to achieve compact size while maintaining manufacturing precision through modular construction and standardized interfaces.
Solution Approach 2:
The patent transforms conventional spherical glass lens elements into aspheric plastic lens elements with specific refractive powers. This parameter change in material (from glass to plastic) and surface geometry (from spherical to aspheric) enables miniaturization while maintaining or improving image quality and reducing manufacturing complexity.
2Ease of manufacture
If conventional spherical glass lens elements are used, then the manufacturing process can be standardized, but the manufacturing cost becomes too high
Solution Approach 1:
The patent changes the material parameter from glass to plastic and the surface geometry from spherical to aspheric. Plastic lenses can be manufactured using injection molding techniques, which are more cost-effective and scalable than traditional glass lens fabrication. The aspheric surfaces are integrated into the molding process, reducing the need for complex post-processing and assembly steps.
Solution Approach 2:
The patent designs lens elements that serve multiple functions: the aspheric surfaces correct optical aberrations, the plastic material enables cost-effective manufacturing, and the modular design with air gaps allows for easy assembly and alignment. This multi-functionality reduces overall manufacturing complexity despite the advanced optical design.
3Stability of the object's composition
If lens elements are cemented together, then the structural stability can be improved, but the manufacturing precision and alignment accuracy deteriorate
Solution Approach 1:
The patent segments the lens assembly into multiple independent lens elements with controlled air gaps between them, eliminating the need for cementing. This segmentation maintains structural stability through precise mechanical positioning and alignment features, while improving manufacturing precision by allowing each lens element to be manufactured and tested independently before final assembly.
Solution Approach 2:
The patent introduces air gaps as intermediaries between lens elements, replacing the cement layer used in conventional designs. This intermediary approach eliminates the alignment errors and optical distortions introduced by cementing, while maintaining structural stability through precision mounting mechanisms and controlled spacing.
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 results in a compact, cost-effective optical lens assembly that improves image quality, reduces manufacturing complexity, and enhances the telecentric effect, enabling high-resolution imaging while maintaining a compact size.
Implementation Method 1
an imaging optical lens assembly 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, a fifth lens element and a sixth lens element
Data Source
AI summary
An imaging optical lens assembly 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, a fifth lens element and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has negative refractive power. The third lens element with refractive power has both an object-side surface and an image-side surface being aspheric. The fourth lens element with refractive power has both an object-side surface and an image-side surface being aspheric. The fifth lens element with refractive power has both an object-side surface and an image-side surface being aspheric. The sixth lens element with refractive power has both an object-side surface and an image-side surface being aspheric.