Eight-Element Imaging Lens Layout for Compact Wide-Angle Optics
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Solution Overview
Problem
Conventional optical lens assemblies struggle to balance image quality, sensitivity, aperture size, volume, and field of view, making it difficult to meet the diverse requirements of modern electronic devices with enhanced image sensors.
Innovation Solution
An imaging optical lens system comprising eight lens elements, each with specific refractive powers and surface configurations, including aspheric surfaces and strategically positioned inflection points, to optimize image quality, field of view, and compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional optical lens assembly designs are used, then manufacturing simplicity is maintained, but image quality, sensitivity, aperture size, volume, and field of view cannot be balanced
Solution Approach 1:
The optical lens assembly is divided into eight distinct lens elements (first through eighth lens elements), each with specific refractive power characteristics and surface configurations. This segmentation allows independent optimization of each element to collectively achieve the desired balance among image quality, sensitivity, aperture size, volume, and field of view, resolving the technical contradiction by distributing functional requirements across multiple specialized components.
Solution Approach 2:
Different lens elements are assigned specific local qualities: the first lens element has negative refractive power with an inflection point on its object-side surface, the second lens element has negative refractive power with a concave image-side surface, the fourth lens element has a concave object-side surface, the sixth lens element has negative refractive power, and the eighth lens element has an inflection point on its image-side surface. This local quality differentiation enables each element to contribute specifically to correcting certain aberrations while maintaining overall system balance.
2Manufacturing precision
If more lens elements are added to improve image quality and correct aberrations, then image quality improves, but device volume and complexity increase
Solution Approach 1:
The patent employs precise parameter control for each lens element, including specific refractive power signs (negative for first, second, and sixth elements), surface curvature configurations (concave image-side surface for second element, concave object-side surface for fourth element), and strategic placement of inflection points (on object-side surface of first element and image-side surface of eighth element). These parameter optimizations enable effective aberration correction with a compact eight-element configuration, avoiding excessive volume increase while maintaining high 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
The system achieves high image quality, large field of view, and compact design by effectively correcting aberrations and balancing refractive power distribution, while allowing for flexible material choices like glass or plastic, reducing manufacturing costs and enhancing manufacturing efficiency.
Implementation Method 1
Each of the eight lens elements has an object-side surface towards the object side and an image-side surface towards the image side. Preferably, the first lens element has negative refractive power. Preferably, the second lens element has negative refractive power.
Data Source
AI summary
An imaging optical lens system includes eight lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. Each of the eight lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The first lens element has negative refractive power. The second lens element has negative refractive power. The image-side surface of the second lens element is concave in a paraxial region thereof. The object-side surface of the fourth lens element is concave in a paraxial region thereof. The sixth lens element has negative refractive power.