Six-Lens Optical Assembly for Wide Field of View and High Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional compact optical systems fail to simultaneously achieve a wide field of view and high image resolution, which is essential for modern electronic devices with camera functionalities.
Innovation Solution
A photographing optical lens assembly comprising six lens elements with specific refractive powers and surface curvatures, including a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power and off-axis surface shape changes, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power and off-axis convex shapes, arranged to correct aberrations and maintain a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the optical system is miniaturized to reduce size, then the device becomes more compact and suitable for portable electronics, but the field of view becomes narrower and image resolution deteriorates
Solution Approach 1:
The optical system is divided into six separate lens elements with specific positive and negative refractive powers. This segmentation allows each element to contribute differently to the overall optical performance, enabling the compact system to achieve a wide field of view by distributing optical functions across multiple elements rather than relying on a single large lens.
Solution Approach 2:
The patent introduces aspheric surfaces with complex curvature variations in the off-axis regions of the lens elements. This dimensional change from simple spherical surfaces to complex aspheric profiles enables the compact optical system to correct aberrations and expand the effective field of view without increasing the overall system size.
2Volume of moving object
If the optical system is miniaturized to reduce size, then the device becomes more compact, but image resolution deteriorates due to increased aberrations
Solution Approach 1:
Different regions of the lens elements have different surface characteristics. The paraxial regions have specific curvature radii while the off-axis regions have different curvature characteristics. This local quality variation allows each region to optimize for its specific function, correcting aberrations locally while maintaining overall compactness and image resolution.
Solution Approach 2:
The patent employs aspheric surfaces with varying curvature radii across different lens elements and regions. The sixth lens element specifically has an image-side surface with at least one convex shape in the off-axis region, creating complex curvature patterns that correct spherical aberration and other distortions, thereby maintaining high image resolution in a compact system.
3Volume of moving object
If lens elements are cemented together to reduce the number of air gaps, then the optical system becomes more compact, but manufacturing precision and alignment become more difficult
Solution Approach 1:
Air gaps are introduced between adjacent lens elements as intermediary spaces that facilitate precise alignment and assembly. These air gaps act as mediators that allow for thermal expansion compensation, reduce stress between cemented surfaces, and enable more accurate positioning of each lens element, thereby improving manufacturing precision while maintaining a compact overall structure.
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 optical lens assembly achieves a balance of wide view angle and high image resolution, effectively correcting aberrations and maintaining a compact size, suitable for electronic devices such as smartphones and tablets.
Implementation Method 1
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... The third lens element with positive refractive power... The fourth lens element with negative refractive power
Data Source
AI summary
A photographing 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 an object-side surface being convex in a paraxial region thereof. The third lens element with positive refractive power has an object-side surface being convex and an image-side surface being concave in a paraxial region thereof. The fourth lens element with negative refractive power has an object-side surface being concave and an image-side surface being convex in a paraxial region thereof. The fifth lens element has an image-side surface being concave in a paraxial region thereof. The sixth lens element has an object-side surface being convex and an image-side surface being concave in a paraxial region thereof.