Wide-Angle Lens Assembly Aberration Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wide-angle lens assemblies fail to simultaneously achieve a large field of view, high resolution, and resistance to environmental temperature changes while maintaining good optical performance.
Innovation Solution
A wide-angle lens assembly design comprising specific arrangements of meniscus and biconvex lenses with negative and positive refractive powers, including air gaps and cemented lenses, optimized to satisfy conditions such as 14.5≤TTL/f≤16.5 and 6≤f4/f≤8, which enhances field of view, resolution, and temperature resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the field of view is increased to achieve a large viewing angle, then the field of view parameter improves, but optical performance deteriorates due to increased aberrations
Solution Approach 1:
The lens assembly is divided into multiple lens groups (first through tenth lenses) with different refractive powers and configurations. Each lens group handles specific portions of the optical path, allowing the system to achieve a wide field of view while correcting aberrations through the coordinated action of segmented optical elements with opposite-signed refractive powers.
Solution Approach 2:
Different regions of the optical system are assigned different functional characteristics. For example, the first lens has negative refractive power to expand the field of view at the periphery, while subsequent lenses with positive refractive power correct aberrations in specific zones. The air gap between third and fourth lenses is strategically positioned to optimize local optical performance in different field regions.
2Measurement precision
If the resolution is increased to achieve high image quality, then the resolution parameter improves, but the system becomes more sensitive to environmental temperature changes
Solution Approach 1:
The patent optimizes specific parameter ratios to balance resolution and temperature stability. The conditions 14.5≤TTL/f≤16.5, 9≤TTL/BFL≤11, 6≤f4/f≤8, and 6≤|f7/f|≤8 define parameter ranges that simultaneously achieve high resolution and temperature resistance. These parameter relationships control how the optical system responds to thermal expansion and refractive index changes with temperature.
Solution Approach 2:
The lens assembly uses a composite structure combining multiple lens materials with different thermal and optical properties. The cemented lens (eighth front lens and eighth rear lens) combines materials to achieve both high resolution through controlled refraction and temperature stability through matched thermal expansion coefficients and refractive index temperature coefficients.
3Reliability
If multiple lens elements are added to correct aberrations and improve performance, then optical performance improves, but the device complexity increases
Solution Approach 1:
The eighth lens is implemented as a cemented lens combining the eighth front lens and eighth rear lens into a single integrated element. This merging reduces the number of air-glass interfaces, simplifies the mechanical structure, and eases alignment requirements while maintaining the aberration correction benefits of having multiple optical elements with different refractive powers.
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 resistance to environmental temperature changes while correcting aberrations and chromatic aberrations, ensuring good optical performance.
Implementation Method 1
The first lens is a meniscus lens with negative refractive power. The second lens is a meniscus lens with negative refractive power. The third lens is with negative refractive power. The fourth lens is a meniscus lens with positive refractive power.
Data Source
AI summary
A wide-angle lens assembly includes a first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth lenses. The first and second lenses are meniscus lenses with negative refractive power. The third and seventh lenses are with negative refractive power. The sixth and tenth lenses are with positive refractive power. The fourth lens is a meniscus lens with positive refractive power. The fifth lens includes a convex surface facing an object side. The eighth lens includes a convex surface facing the object side. The ninth lens includes a concave surface facing the object side and a convex surface facing an image side. The first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth lenses are arranged in order from the object side to the image side along an optical axis.