Six-Element Wide-Angle Lens Assembly for Compact High-Resolution Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wide-angle lens assemblies struggle to achieve a balance between large field of view, miniaturization, and high resolution.
Innovation Solution
A wide-angle lens assembly comprising a specific arrangement of lenses with varying refractive powers and surface curvatures, including a first lens with negative power, a second lens with a concave object-side surface, a third lens with positive power, and a sixth lens with a concave image-side surface, optimized by conditions such as R21/d45, Ra-R21, and BFL/f, to enhance optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the lens assembly uses conventional structure to achieve large field of view, then the field of view increases, but the total lens length increases and miniaturization cannot be achieved
Solution Approach 1:
The lens assembly is divided into six distinct lens elements with specific refractive powers and surface curvatures. Each lens element (first lens with negative power, second lens with concave object-side surface, third lens with positive power, fourth lens, fifth lens, and sixth lens with concave image-side surface) is optimized individually and collectively to achieve the desired optical performance. This segmentation allows independent optimization of each element's contribution to field of view while controlling overall length.
Solution Approach 2:
The patent applies specific parameter constraints to achieve miniaturization with large field of view: −70≤R21/d45≤−18, 5 mm2≤(Ra-R21)×d45≤11 mm2, −2.95≤R62/T6≤−2.01, 0.35≤(R11-R12)/TTL≤0.61, 1.86≤BFL/f≤1.99, and 0.47≤f/AAG≤0.76. These parameter changes optimize the relationship between radius of curvature, thickness, and focal length to simultaneously increase field of view and decrease total lens length.
2Length of moving object
If the lens assembly is miniaturized to decrease total lens length, then the total lens length decreases, but optical performance and resolution deteriorate
Solution Approach 1:
Different lens elements are assigned different refractive powers and surface curvature characteristics to optimize local optical functions. The first lens has negative refractive power with specific curvature relationships, the second lens has a concave object-side surface, the third lens has positive refractive power, and the sixth lens has a concave image-side surface. This local quality differentiation ensures that each region of the lens assembly contributes optimally to image quality and resolution despite miniaturization.
Solution Approach 2:
The patent maintains high resolution in miniaturized form by enforcing specific parameter ranges: −70≤R21/d45≤−18, −2.95≤R62/T6≤−2.01, 1.86≤BFL/f≤1.99, and 0.47≤f/AAG≤0.76. These parameter constraints ensure that even as total lens length decreases, the optical performance and resolution are preserved through optimized curvature and spacing relationships.
3Measurement precision
If the lens assembly uses conventional design to achieve high resolution, then the resolution improves, but the total lens length increases and miniaturization is compromised
Solution Approach 1:
The lens assembly is segmented into six elements with specific refractive power assignments: first lens (negative), second lens (with concave object-side surface), third lens (positive), fourth lens, fifth lens, and sixth lens (with concave image-side surface). This segmentation enables high resolution to be achieved through coordinated optimization of each element rather than requiring a single long lens, thus enabling miniaturization.
Solution Approach 2:
The patent achieves high resolution with miniaturization by enforcing parameter constraints including −70≤R21/d45≤−18, 5 mm2≤(Ra-R21)×d45≤11 mm2, −2.95≤R62/T6≤−2.01, and 1.86≤BFL/f≤1.99. These parameter changes optimize the relationship between lens curvature, thickness, and spacing to achieve high resolution in a compact form factor.
4Area of moving object
If the lens assembly increases field of view with conventional structure, then the field of view increases, but aberrations increase and optical performance deteriorates
Solution Approach 1:
Different lens elements are designed with specific local qualities to correct aberrations: the first lens has negative refractive power to control field curvature, the second lens has a concave object-side surface to reduce spherical aberration, the third lens has positive refractive power for focusing, and the sixth lens has a concave image-side surface to control astigmatism. This local quality optimization ensures aberrations are corrected across the wide field of view.
Solution Approach 2:
The patent controls aberrations in wide-angle applications by enforcing parameter constraints: −70≤R21/d45≤−18, −2.95≤R62/T6≤−2.01, and 0.35≤(R11-R12)/TTL≤0.61. These parameter changes optimize the curvature and spacing relationships to minimize aberrations while maintaining large field of view.
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 solution effectively decreases total lens length, increases field of view, and improves resolution while correcting aberrations, ensuring good optical performance.
Implementation Method 1
The first lens is with negative refractive power. The second lens is with refractive power. The third lens is 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.
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, and a sixth lens. The first lens is with negative refractive power. The second lens is with refractive power and includes a concave surface facing an object side. The third lens is 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 first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged in order from the object side to an image side along an optical axis.