Eight-Lens Optical Assembly for Miniaturization and Thermal Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current lens assemblies fail to simultaneously achieve miniaturization, high resolution, and resistance to severe environmental temperature variations while maintaining good optical performance.
Innovation Solution
A lens assembly design comprising specific lenses with varying refractive powers and surface curvatures, including meniscus, biconvex, and biconcave lenses, arranged along an optical axis with a stop between certain lenses, satisfying specific conditions for effective focal length, air intervals, and diameter ratios to optimize total lens length, resolution, and temperature resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the lens assembly is miniaturized to reduce total lens length, then the device size is reduced, but the resolution and optical performance deteriorate
Solution Approach 1:
The lens assembly is divided into eight individual lens elements with specific refractive powers and surface curvatures. Each lens element (first lens through eighth lens) is designed with particular characteristics (positive or negative refractive power, meniscus/biconvex/biconcave shapes) to collectively achieve high resolution while maintaining a compact total length of 9.5mm or less.
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element including refractive power, surface curvature radii, and thickness. By carefully controlling these parameters (e.g., first lens with negative refractive power and specific curvature radii R1 and R2, fourth lens with positive refractive power and convex surface facing image side), the system achieves optimal resolution and optical performance within a miniaturized form factor.
2Measurement precision
If the lens assembly is designed for high resolution, then the optical performance is improved, but the total lens length increases
Solution Approach 1:
The high resolution is achieved through segmentation into eight specialized lens elements rather than a single element or fewer elements. This segmentation allows each element to contribute specifically to resolving optical aberrations while keeping the total length compact at 9.5mm or less.
Solution Approach 2:
The lens assembly uses a composite design combining lens elements with different refractive powers (positive and negative) and different geometric configurations (meniscus, biconvex, biconcave). This composite approach enables high resolution by correcting various types of optical aberrations through the combined effect of all eight elements within a short total length.
3Stability of the object's composition
If the lens assembly is designed to resist severe environment temperature variation, then the stability is improved, but the device complexity increases
Solution Approach 1:
The lens elements are designed with specific refractive power ranges and surface curvature parameters that provide thermal stability. The eighth lens specifically has negative refractive power with a concave surface facing the object side, and the seventh lens has positive refractive power, creating a configuration that resists temperature-induced focal length changes and maintains optical stability across severe temperature variations.
Solution Approach 2:
Different lens elements have locally optimized properties tailored to their specific positions and functions. For example, the first lens has negative refractive power with specific curvature radii, while the fourth lens has positive refractive power with a convex surface facing the image side. This local optimization of each element's properties contributes to the overall temperature resistance of the assembly.
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 results in a shorter total lens length, increased resolution, improved resistance to environmental temperature changes, and corrected aberrations, maintaining good optical performance across varying temperatures.
Implementation Method 1
The first lens is a meniscus lens with negative refractive power... The second lens is with negative refractive power... The third lens is with refractive power... The fourth lens is with positive refractive power...
Data Source
AI summary
A lens assembly comprises a first lens, a second lens, a third lens, a fourth lens, a sixth lens, a seventh lens and an eighth lens which are arranged sequentially from an object side to an image side along an optical axis. The first lens is a meniscus lens with negative refractive power and comprises a convex surface facing an object side and a concave surface facing an image side. The second lens is with negative refractive power. The third lens is with refractive power. The fourth lens is with positive refractive power. The fifth lens is with positive refractive power and comprises a convex surface facing the image side. The sixth lens is with refractive power. The seventh lens is with positive refractive power. The eighth lens is with refractive negative power and comprises a concave surface facing the object side.