Six-Element Lens Assembly Aberration Correction
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Solution Overview
Problem
Conventional optical systems face challenges in achieving a balance between high image quality, low sensitivity, proper aperture size, miniaturization, and a desirable field of view, particularly with the advancement of semiconductor technology and increasing functionality in electronic devices.
Innovation Solution
A photographing optical lens assembly comprising six lens elements with specific refractive powers and configurations, including air gaps between adjacent elements, to optimize refractive power distribution, correct aberrations, and achieve miniaturization while maintaining image quality and field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens elements is increased to improve image quality and correct aberrations, then image quality improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The lens assembly is divided into six distinct lens elements with specific refractive power distributions (positive, negative, negative, negative, positive, negative). Each element is optimized for specific aberration correction functions, allowing complex optical performance to be achieved through modular segmentation rather than a single complex element.
Solution Approach 2:
Different lens elements are assigned different refractive powers and surface curvatures tailored to their specific positions and functions. For example, the first element has positive power for light convergence, while intermediate elements have negative power for aberration correction. Each element's object-side and image-side surfaces have specifically designed curvatures to address local optical requirements.
2Illumination intensity
If the aperture size is increased to improve light gathering capability, then image quality improves, but the sensitivity control becomes difficult and the device size increases
Solution Approach 1:
The system optimizes the aperture diameter relative to the focal length (f-number) within specific ranges to balance light gathering capability with sensitivity control. The refractive powers of individual lens elements are also parameter-optimized to maintain proper light convergence without excessive sensitivity, achieving a balanced optical performance.
3Volume of moving object
If the lens assembly is miniaturized to reduce device size, then device compactness improves, but the field of view and image quality become difficult to maintain
Solution Approach 1:
Multiple lens elements with specifically designed surface curvatures are employed to achieve compact form factor while maintaining optical performance. The curved surfaces of each element are optimized to control light paths efficiently, enabling a reduced total track length without sacrificing field of view or image quality.
Solution Approach 2:
The patent employs a multi-element configuration that distributes optical power across multiple dimensions rather than relying on a single large element. By stacking six elements with alternating positive and negative powers, the system achieves compact axial length while maintaining lateral field of view through careful curvature design of each element's surfaces.
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 effectively balances image quality, miniaturization, and field of view, enhancing the performance of electronic devices with improved light convergence, aberration correction, and reduced manufacturing complexity.
Implementation Method 1
The first lens element has positive refractive power. The second lens element has negative refractive power. The third lens element has negative refractive power. The fourth lens element has negative refractive power. The fifth lens element has positive refractive power. The sixth lens element has negative refractive power.
Data Source
AI summary
A photographing optical lens assembly includes six lens elements which are, 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. Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has positive refractive power. The second lens element has negative refractive power. The third lens element has negative refractive power. The fourth lens element has negative refractive power. The fifth lens element has positive refractive power. The sixth lens element has negative refractive power. An axial distance between the fourth lens element and the fifth lens element is larger than an axial distance between the fifth lens element and the sixth lens element.