Wide-Angle Lens Assembly Aberration Control
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Solution Overview
Problem
Current wide-angle lens assemblies fail to simultaneously achieve a large field of view, large aperture, and high resolution, necessitating a new structural design to meet these requirements.
Innovation Solution
A wide-angle lens assembly comprising specific lenses with defined refractive powers and surface curvatures, arranged along an optical axis, including a first biconcave lens with negative refractive power, meniscus lenses with positive and negative refractive powers, and biconvex and biconcave lenses, with cemented fifth and sixth lenses, satisfying conditions for effective focal lengths and radius ratios to enhance field of view and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If conventional wide-angle lens assembly structures are used, then the field of view can be increased, but the aperture remains small and resolution is insufficient
Solution Approach 1:
The lens assembly is divided into seven distinct lens elements with specific refractive powers and surface curvatures. Each lens element (first through seventh lenses) is optimized independently with specific focal lengths and curvature ratios, allowing the system to achieve both wide field of view and high resolution simultaneously through coordinated optimization of segmented components
Solution Approach 2:
Different regions of the lens assembly are assigned different optical properties. The first lens has negative refractive power with specific concave surface curvature to expand field of view, while subsequent lenses have positive refractive powers to maintain resolution. Each lens surface curvature is locally optimized according to its position in the optical path
2Measurement precision
If the lens assembly is designed for large aperture and high resolution, then the optical performance improves, but the device complexity increases
Solution Approach 1:
The patent establishes specific parameter ranges for each lens element to achieve optimal performance. The first lens curvature ratio (R11×R12)/(R11+R12) is constrained to -6.0mm to -3.5mm, the second lens ratio (R21×R22)/(R21+R22) to -4.5mm to -2.8mm, and the third lens ratio (R31×R32)/(R31+R32) to -10.1mm to -4.8mm. These parameter constraints guide the design toward high resolution while controlling complexity through standardized optimization criteria
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 effectively increases the field of view, resolution, and corrects aberrations, reducing spherical and chromatic aberrations while controlling lens length and diameter, resulting in improved optical performance.
Implementation Method 1
The first lens has negative refractive power and includes a concave surface facing an object side
Implementation Method 2
The second lens is a meniscus lens with positive refractive power
Implementation Method 3
The third lens is a meniscus lens with positive refractive power
Data Source
AI summary
A wide-angle lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens is with negative refractive power and includes a concave surface facing an object side. The second lens is a meniscus lens with refractive power. The third lens is a meniscus lens with positive refractive power. The fourth lens is with refractive power. The fifth lens is with refractive power. The sixth lens is with refractive power. The seventh lens is with positive refractive power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are arranged in order from the object side to an image side along an optical axis.