Nine-Element Optical Imaging Lens for High Resolution in Compact Modules
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Solution Overview
Problem
Existing optical imaging lenses face challenges in achieving high pixel number, high resolution, and large aperture stop while maintaining a compact size and image height, which complicates design and production.
Innovation Solution
An optical imaging lens design comprising nine lens elements with specific convex and concave surface configurations and refracting powers, including a concave optical axis region of the first lens element and a convex periphery region of the fourth lens element, enhances resolution and aperture stop while maintaining a slim and compact form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lens elements is increased to improve resolution and image height, then the imaging quality and aperture stop are improved, but the device complexity and system length increase
Solution Approach 1:
The optical imaging lens is divided into nine separate lens elements with different refracting powers and surface configurations. Each lens element is optimized for specific functions: the first lens element has positive refracting power with a convex object-side surface, the second has negative refracting power, and subsequent elements have varying configurations. This segmentation allows resolution and image height to be improved while distributing the complexity across multiple specialized components rather than one complex element.
Solution Approach 2:
Different regions of the lens elements have different surface shapes tailored to specific functions. For example, the object-side surface of the first lens element is convex, while the image-side surface of the second lens element has specific curvature characteristics. The periphery regions and optical axis regions of various lens elements have differentiated surface configurations to optimize local optical performance for resolution and image height while managing overall system complexity.
2Measurement precision
If the image height is increased to accommodate high pixel numbers, then the resolution and aperture stop are improved, but the system length and compactness are compromised
Solution Approach 1:
The optical imaging lens employs dynamic optimization of the nine lens elements to achieve multiple objectives simultaneously. The lens elements are configured with specific refracting powers and surface shapes that dynamically adjust the optical path to improve resolution and image height while controlling system length. The combination of positive and negative refracting powers across the elements creates a balanced optical system that manages length constraints.
Solution Approach 2:
The patent optimizes multiple parameters including the refracting powers of individual lens elements, the curvature radii of object-side and image-side surfaces, and the spacing between elements. By carefully adjusting these parameters, the system achieves improved resolution and image height while maintaining compact dimensions. Specific parameter relationships are established to balance the trade-off between image height and system length.
3Illumination intensity
If the aperture stop is enlarged to improve light gathering capability, then the imaging quality is improved, but the manufacturing difficulty and design complexity increase
Solution Approach 1:
The aperture stop function is distributed across multiple lens elements rather than relying on a single large aperture element. The first lens element with positive refracting power and the second lens element with negative refracting power work together to achieve the desired aperture characteristics. This segmentation allows the aperture stop to be enlarged for improved light gathering while maintaining manageable manufacturing requirements for each individual element.
Solution Approach 2:
The object-side surface of the first lens element is configured with specific convex characteristics to optimize aperture stop performance. Different lens elements have localized surface configurations that collectively achieve the enlarged aperture effect. The periphery regions of various lens elements have differentiated surface shapes that contribute to the overall aperture characteristics while simplifying individual manufacturing processes.
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 design achieves increased resolution, enlarged aperture stop, and improved image height with good imaging quality, suitable for mobile electronic devices.
Implementation Method 1
Each of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth lens elements may also have an object-side surface facing toward the object side and allowing imaging rays to pass through. Each of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth lens elements may also have an image-side surface facing toward the image side and allowing the imaging rays to pass through.
Data Source
AI summary
An optical imaging lens may include 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, an eighth lens element and a ninth lens element positioned in an order from an object side to an image side. Through designing concave and/or convex surfaces of the lens elements, the optical imaging lens may increase resolution, enlarge aperture stop and image height, and maintain well image quality.