Six-Element Optical Imaging Lens for Wide Field of View
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Solution Overview
Problem
Current optical imaging lenses face challenges in achieving a great field of view while maintaining a smaller front surface area, as the area required for the lens is contradictory to the need for a slim and thin design, particularly in mobile electronic devices aiming for all-screen displays.
Innovation Solution
The optical imaging lens is designed with six lens elements, featuring specific surface shapes and refracting powers, including convex and concave regions, and optimized parameters such as thickness and air gaps to satisfy certain inequalities, allowing for a larger field of view while minimizing the front surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the area of optical imaging lens is increased to facilitate great field of view, then the field of view is improved, but the front surface area of the lens becomes larger which contradicts the slim and thin design requirement
Solution Approach 1:
The optical imaging lens is divided into six separate lens elements with different refracting powers and surface shapes. This segmentation allows each element to contribute differently to the overall optical performance, enabling a greater field of view while maintaining a compact front surface area through optimized individual element design and arrangement.
Solution Approach 2:
Different regions of the lens elements have different surface shapes (convex or concave) and refracting powers tailored to specific functional requirements. For example, the first lens element has a convex object-side surface and concave image-side surface, while the second element has opposite characteristics. This local optimization of optical properties enables efficient light control for wide field of view without increasing overall lens area.
2Length of moving object
If the system length is reduced to achieve slim and thin design, then the device thickness is improved, but the optical performance may be compromised
Solution Approach 1:
The six lens elements are arranged in a compact sequence along the optical axis with minimized air gaps between them. This nested arrangement allows the optical system to achieve its required optical path length and focal properties within a reduced overall system length, maintaining optical performance while enabling slim device design.
Solution Approach 2:
The patent optimizes specific parameters including the thickness of each lens element (T1-T6), the air gaps between elements (G12, G23, G34, G45, G56), and the refractive indices (n1-n6) to achieve the desired optical performance in a compact form. The inequality T1/AAG ≥ 1.000 and TTL/T1 ≤ 5.100 provide quantitative constraints that ensure optimal parameter combinations for reduced system length while maintaining imaging 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
This configuration enables the optical imaging lens to provide a great field of view and a smaller front surface area simultaneously, improving imaging quality and reducing the system length, which is beneficial for mobile devices.
Implementation Method 1
Each of the first, second, third, fourth, fifth and sixth lens element may also have an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through
Data Source
AI summary
The present invention provides an optical imaging lens. The optical imaging lens comprises six lens elements positioned in an order from an object side to an image side. Through controlling convex or concave shape of surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens may present a great angle of view with smaller surface area of the front side of the optical imaging lens.