Nine-Element Optical Imaging Lens for High Resolution and Large Aperture
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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 good imaging quality, particularly due to difficulties in designing systems with increased image height and enlarged aperture stop.
Innovation Solution
An optical imaging lens design comprising nine lens elements with specific convex and concave surface shapes and refracting powers, including a configuration with positive refracting power for the first lens element, negative refracting power for the second lens element, and concave regions on selected surfaces of subsequent elements, adhering to certain inequalities to optimize parameters such as image height and aperture stop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lens elements is increased to improve resolution and enlarge aperture stop, then imaging quality and aperture are improved, but 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 shapes. Each lens element is designed to perform specific optical functions, allowing the system to achieve high resolution and corrected aberrations while maintaining manageable complexity through modular design
Solution Approach 2:
Different lens elements are assigned different local properties including positive and negative refracting powers, and specific convex/concave surface configurations. For example, the first lens element has positive refracting power with a concave periphery region on its image-side surface, while the second lens element has negative refracting power, creating localized optical corrections throughout the system
2Measurement precision
If the image height is increased to accommodate high pixel number, then pixel capacity is improved, but system length and difficulty of design increase
Solution Approach 1:
The patent increases image height (vertical dimension) to accommodate higher pixel numbers on the image sensor, while compensating for the resulting increase in system length by optimizing the arrangement and focal lengths of the nine lens elements. This allows the system to expand in the image plane dimension while controlling the optical path length through careful design of inter-lens distances and focal properties
3Illumination intensity
If the aperture stop is enlarged to improve light gathering, then imaging quality is improved, but difficulty of design increases
Solution Approach 1:
The patent employs specific parameter relationships among the nine lens elements to enable enlarged aperture stop design. By establishing particular ratios and relationships between focal lengths, refractive indices, and surface curvatures of different lens elements, the system achieves large aperture stop with improved light gathering while maintaining design feasibility through parameter optimization
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 chromatic aberration, while maintaining a slim and compact appearance, thereby enhancing imaging quality.
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.