Aspheric Lens Group for Miniaturized Optical Systems
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Solution Overview
Problem
Current optical lenses face challenges in achieving miniaturization, low aberration, high resolution, and reduced weight while maintaining high optical performance, especially in limited spaces, which affects the image quality of imaging devices.
Innovation Solution
The optical lens design includes an aperture stop and a lens group with at least four lenses, at least one of which is an aspheric lens, each with a clear aperture of less than 14 mm, arranged to provide a positive refractive power and optimized refractive interfaces for improved aberration correction and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical lens uses conventional spherical lenses with larger clear aperture to achieve high optical performance, then the image quality and resolution are improved, but the size and weight of the optical lens increase
Solution Approach 1:
The patent employs aspheric lenses instead of conventional spherical lenses. The aspheric surfaces allow for better aberration correction with reduced lens curvature, enabling smaller lens diameters while maintaining high image quality. This curvature optimization resolves the contradiction between image quality and lens size by achieving superior optical performance without requiring large clear apertures.
Solution Approach 2:
The patent optimizes multiple parameters including the clear aperture diameter (reducing to smaller than 14 mm), focal lengths, and spacing between lenses to achieve miniaturization. By carefully adjusting these parameters, the system maintains high resolution and low aberration while significantly reducing the overall size of the optical lens assembly.
2Volume of moving object
If the optical lens is miniaturized with smaller clear aperture lenses, then the size and weight are reduced, but the aberration correction and image quality deteriorate
Solution Approach 1:
The aspheric lenses in the patent provide superior aberration correction compared to spherical lenses. The non-spherical surfaces enable precise control of light rays, effectively correcting spherical aberration, coma, and other optical distortions even in compact configurations with small clear apertures, thus resolving the contradiction between miniaturization and aberration correction.
Solution Approach 2:
The patent uses a composite lens group containing both aspheric and spherical lenses, along with potential use of different glass materials with varying refractive indices and Abbe numbers. This composite approach allows for sophisticated aberration correction across the compact lens assembly, maintaining high image quality despite the reduced size.
3Measurement precision
If the optical lens uses more lenses to improve aberration correction, then the optical performance is enhanced, but the device complexity and occupied space increase
Solution Approach 1:
The incorporation of aspheric lenses reduces the total number of lenses needed in the system. The superior aberration correction capability of aspheric surfaces allows for effective optical performance with fewer elements, simplifying the overall device complexity while maintaining or enhancing image quality compared to conventional spherical lens systems.
Solution Approach 2:
The patent combines multiple functions into the lens group, where the aspheric and spherical lenses work together to simultaneously correct various types of aberrations. This merging of correction functions into a compact multi-element group achieves high optical performance without requiring separate correction elements, thereby reducing overall device complexity.
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
This design enables miniaturization with enhanced aberration correction and improved image quality in a compact form, suitable for portable electronic devices and imaging systems.
Implementation Method 1
The optical lens has a positive refractive power and includes at least one aspheric lens among four lenses
Implementation Method 2
each of the four lenses has a clear aperture of smaller than 14 mm
Data Source
AI summary
An optical lens includes, in order along a direction, an aperture stop and a lens group with a positive refractive power. The aperture stop is disposed at an outermost side of all lenses of the optical lens, and the lens group has at least four lenses. At least one of the four lenses is an aspheric lens, and each of the four lenses has a clear aperture of smaller than 14 mm.