Wide Viewing Angle Optical Lens Assembly Aberration Correction
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Solution Overview
Problem
Existing wide viewing angle optical lens assemblies face challenges in achieving a compact size, greater viewing angle, and superior imaging quality due to limitations in aberration correction and miniaturization, as seen in prior art configurations with three-element lens assemblies.
Innovation Solution
A wide viewing angle optical lens assembly comprising three non-cemented lens elements with specific refractive powers and curvature radii, including a first lens element with negative refractive power, a second lens element with positive refractive power, and a third lens element with positive refractive power, optimized by conditions such as 0.6 < f2/f3 < 1.3 and 0 < R1/|R5| < 1.0, which enhance the viewing angle and reduce aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a three-element lens assembly is used with an aperture stop disposed between the first and second lens elements, then the lens assembly can provide imaging functionality, but the total length of the lens assembly increases, preventing miniaturization
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive powers and curvature radii of the three lens elements according to specific mathematical relationships. By changing these optical parameters and removing the aperture stop, the patent achieves a compact lens assembly with reduced total length while maintaining imaging functionality through precise control of light paths and focal properties.
Solution Approach 2:
The patent extracts and removes the aperture stop from the traditional three-element lens assembly configuration. This extraction eliminates the need for additional spacing and structural support for the stop, directly contributing to the miniaturization of the overall lens assembly while the three lens elements themselves are reconfigured to provide both imaging and aperture control functions.
2Ease of manufacture
If a three-element lens assembly with glass and plastic lenses is used, then the lens assembly can be manufactured, but the freedom of correcting aberration is reduced, making image quality control difficult
Solution Approach 1:
The patent applies parameter changes by defining specific mathematical relationships between the focal lengths and curvature radii of the three lens elements. These parameter constraints provide a systematic approach to aberration correction, enabling precise control of image quality while maintaining manufacturing feasibility through standardized lens design procedures and material selection.
Solution Approach 2:
The patent employs composite materials by combining glass and plastic lens elements with specific refractive indices and Abbe numbers. This composite approach allows optimization of each element's material properties to correct different types of aberrations, achieving superior image quality control while maintaining ease of manufacture through the use of both traditional glass and modern plastic lens materials.
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 provides a compact optical lens assembly with improved viewing angle and image quality by proper allocation of refractive power and curvature radii, effectively correcting aberrations and achieving a shorter total optical length.
Implementation Method 1
a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface, a second lens element with positive refractive power having a convex object-side surface and a third lens element with positive refractive power having a convex image-side surface
Data Source
AI summary
A wide viewing angle optical lens assembly comprises, in order from an object side to an image side, a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface, a second lens element with positive refractive power having a convex object-side surface, a third lens element with positive refractive power having a convex image-side surface. By adjusting the relationship among the above-mentioned lens elements, the wide viewing angle optical lens assembly can effectively reduce its size, obtain greater angle of view as well as superior imaging quality.