Meniscus Lens Assembly for High-Resolution Temperature Stability
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Solution Overview
Problem
Existing lens assemblies struggle to meet the requirements of miniaturization, high resolution, and resistance to environmental temperature changes simultaneously while maintaining good optical performance.
Innovation Solution
A lens assembly comprising a specific arrangement of lenses with negative and positive refractive powers, including meniscus and biconvex lenses, arranged along an optical axis, with optimized parameters to achieve a shortened total lens length, increased resolution, and resistance to temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the lens assembly is miniaturized to reduce total lens length, then the size is reduced, but the resolution and optical performance deteriorate
Solution Approach 1:
The lens assembly is divided into multiple lens elements (first lens L11, second lens L12, third lens L13, fourth lens L14, fifth lens L15) with different refractive powers and shapes. Each lens element performs a specific function in the optical path, allowing the system to achieve high resolution while maintaining a compact overall length through optimized segmentation and arrangement of individual components.
2Measurement precision
If the lens assembly is designed for high resolution, then the resolution is improved, but the total lens length increases
Solution Approach 1:
The patent employs precise control of optical parameters including refractive indices (Nd1=1.5168, Nd2=1.6156, Nd3=1.7174, Nd4=1.8639, Nd5=1.9224), curvature radii (R1 through R15), and thickness values (d1 through d5) to achieve high resolution within a compact form factor. By optimizing these parameters, the lens assembly achieves excellent optical performance with a reduced total length of 3.5mm.
3Measurement precision
If the lens assembly uses multiple lens elements to improve optical performance, then the resolution is improved, but the device complexity increases
Solution Approach 1:
Each lens element in the assembly serves multiple functions: the first lens L11 (negative refractive power) corrects field curvature and distortion, the second lens L12 (positive refractive power) provides focusing capability, the third lens L13 (positive refractive power) corrects chromatic aberration, the fourth lens L14 (positive refractive power) enhances resolution, and the fifth lens L15 (positive refractive power) controls spherical aberration. This multi-functional design allows each component to contribute to overall optical performance while maintaining a manageable system complexity.
4Stability of the object's composition
If the lens assembly is designed to resist environmental temperature change, then the temperature stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent achieves temperature stability through carefully selected material properties and optical parameters. The lens elements use materials with specific refractive indices (Nd1=1.5168, Nd2=1.6156, Nd3=1.7174, Nd4=1.8639, Nd5=1.9224) and Abbe numbers (vd1=64.16, vd2=56.41, vd3=39.65, vd4=31.25, vd5=23.48) that provide thermal compensation. The optimized curvature radii and thickness values ensure that the optical system maintains stable performance across temperature variations, with the total lens length controlled at 3.5mm and F-number at 1.33.
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 assembly effectively achieves a shortened total lens length, increased resolution, and resistance to environmental temperature changes, while maintaining good optical performance by correcting aberrations and balancing sensitivity around the stop.
Implementation Method 1
The first lens is a meniscus lens with negative refractive power. The second lens is with positive refractive power and includes a convex surface facing an image side. The third lens is a meniscus lens with positive refractive power. The fourth lens is with positive refractive power. The fifth lens is with refractive power
Data Source
AI summary
A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens is a meniscus lens with negative refractive power. The second lens is with positive refractive power and includes a convex surface facing an image side. The third lens is a meniscus lens with positive refractive power. The fourth lens is with positive refractive power. The fifth lens is with refractive power and includes a convex surface facing an object side. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in order from an object side to the image side along an optical axis.