Six-Element Optical Imaging Lens for Compact Wide-Angle Design
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Solution Overview
Problem
Traditional optical imaging lenses with large view angles are often bulky and suffer from poor distortion aberrations, making it challenging to achieve compact sizes with good imaging quality while considering production difficulties and material properties.
Innovation Solution
The optical imaging lens is designed with six lens elements, where the convex or concave shape of surfaces and specific parameters are controlled to satisfy certain inequalities, allowing for a shortened system length, enlarged aperture, and improved imaging quality with a broad half field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If traditional lens designs are used to achieve large view angles, then the half field of view is enlarged, but the system length increases and the lens becomes bulky
Solution Approach 1:
The optical imaging lens is divided into six distinct lens elements with different refractive powers and surface shapes. Each lens element is optimized to contribute specifically to expanding the half field of view while maintaining compact overall dimensions, rather than using a single bulky lens design
Solution Approach 2:
The patent applies specific parameter constraints including the inequality 15.000°/mm≤HFOV/ImgH≤30.000°/mm to optimize the half field of view to image height ratio, and 0.800≤(EFL+T2+T5+T6)/ALT≤1.600 to control the relationship between effective focal length, lens thicknesses and total axial length, achieving large HFOV with shortened system length
2Duration of action of stationary object
If traditional lens designs are used to achieve large view angles, then the half field of view is enlarged, but distortion aberrations worsen
Solution Approach 1:
Different lens elements are assigned different local optical properties: the first lens element has negative refracting power with specific convex/concave surface configurations, while subsequent elements have positive or negative powers tailored to their positions. This local optimization of each element's surface shape and refractive power collectively corrects distortion aberrations across the entire field of view
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element including refractive powers, surface curvatures, and thicknesses to control and minimize distortion aberrations while maintaining the enlarged half field of view
3Length of stationary object
If the size of each lens element is proportionally shrunk to reduce system length, then the system length is shortened, but imaging quality deteriorates
Solution Approach 1:
Rather than uniformly shrinking all lens elements, the patent segments the optical system into six elements with differentiated designs. This allows certain elements to maintain optimized dimensions for image quality while others are compacted, achieving short system length without sacrificing imaging performance
Solution Approach 2:
The patent applies the inequality 0.800≤(EFL+T2+T5+T6)/ALT≤1.600 to maintain proper proportional relationships between focal length, thicknesses and total length, ensuring imaging quality is preserved even with reduced system dimensions
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 design effectively shortens the system length, broadens the half field of view, and enhances imaging quality by optimizing the shape and refracting power of each lens element, while maintaining manufacturability and reducing production complexity.
Implementation Method 1
Each of the first, second, third, fourth, fifth and sixth 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 and sixth 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
The present disclosure provides an optical imaging lens. The optical imaging lens may comprise six lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens may shorten the system length and enlarge the view angle and aperture size.