Five-Lens Optical Imaging System for Compact Wide-Angle Design
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Solution Overview
Problem
Wide-angle lenses with a field of view of 120 degrees have a large total track length and small aperture, making them unsuitable for small electronic devices and resulting in poor imaging quality.
Innovation Solution
The optical imaging lens is designed with a specific configuration of five individual lenses, satisfying certain formulas to balance the field of view and F-number, reducing the total track length, and improving imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a wide-angle lens with 120 degrees field of view is designed, then the field of view is improved, but the total track length becomes large and the aperture becomes small
Solution Approach 1:
The lens system is divided into five individual lenses with specific configurations. Each lens has carefully designed parameters including curvature radii, thicknesses, and material properties to achieve the desired field of view while controlling the overall track length. The segmentation allows for optimized optical paths that reduce the total length required for 120-degree field of view.
Solution Approach 2:
The patent applies specific parameter changes by satisfying mathematical formulas that relate the field of view, F-number, and track length. By adjusting parameters such as the curvature radii of lens surfaces, the thickness of individual lenses, and the refractive indices of lens materials, the system achieves a balance between field of view and track length that was not possible with conventional designs.
2Area of moving object
If a wide-angle lens with 120 degrees field of view is designed, then the field of view is improved, but the aperture becomes small resulting in poor imaging quality
Solution Approach 1:
The patent uses parameter changes to optimize the F-number and aperture characteristics. By carefully selecting and adjusting the parameters of the five lenses, including their curvatures, thicknesses, and material properties, the system achieves an optimal balance between field of view and aperture size, resulting in improved imaging quality while maintaining 120-degree field of view.
Solution Approach 2:
The lens system employs composite material strategies by selecting specific refractive indices and Abbe numbers for different lens elements. The combination of different glass types and material properties allows for optimized optical performance, enabling the system to achieve both wide field of view and adequate aperture for high imaging quality.
3Area of moving object
If a conventional wide-angle lens design is used, then the field of view is achieved, but the lens cannot be applied in small electronic devices
Solution Approach 1:
The lens system is segmented into five individual lenses with optimized parameters that enable compact integration. This segmentation allows for a reduced overall track length that can fit within small electronic devices while still achieving 120-degree field of view, making the lens suitable for mobile devices and other compact applications.
Solution Approach 2:
The patent applies dimensional optimization by arranging the five lenses in a compact configuration that utilizes spatial efficiency. The specific arrangement and parameter selection create an optical path that achieves wide field of view without requiring excessive track length, effectively transitioning from conventional linear arrangements to optimized three-dimensional configurations suitable for miniaturized devices.
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 lens achieves a good balance between the amount of input light and field of view, allowing it to be applied in miniaturized electronic devices while maintaining high imaging quality.
Implementation Method 1
an optical imaging lens, from object side to image side, includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens
Data Source
AI summary
An optical imaging lens, an imaging module, and an electronic device are provided. The optical imaging lens, from an object side to an image side, is composed of a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The optical imaging lens satisfies following formula: 24<(V5−V4)/(TL5−TL4)<42, 48<FOV/FNO<52. Wherein V4 is a dispersion coefficient of the fourth lens, V5 is a dispersion coefficient of the fifth lens, TL4 is a distance from an object surface of the fourth lens to an image plane of the optical imaging lens along an optical axis, TL5 is a distance from an object surface of the fifth lens to the image plane along the optical axis, FOV is a field of view of the optical imaging lens, and FNO is F-number of the optical imaging lens.