Six-Lens Optical System with Aspheric Surfaces for Miniaturization
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Solution Overview
Problem
Conventional optical image-capturing systems in portable electronic devices fail to meet the increasing demands for miniaturization and improved image quality due to larger photosensitive components and higher pixel requirements.
Innovation Solution
An optical lens configuration comprising a series of lenses with specific refractive powers and surface geometries, including a convex-concave lens and aspheric surfaces, optimized for reduced size and improved image quality, using materials like plastic and glass, with careful arrangement of refractive powers and Abbe numbers to control chromatic aberration and distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical systems are used, then the system structure is simple, but the image quality and resolution are insufficient for high-pixel requirements
Solution Approach 1:
The optical system is divided into six individual lens elements with specific refractive powers and surface geometries. Each lens element contributes to correcting specific aberrations, allowing the system to achieve high image quality through cumulative optimization of multiple components rather than relying on a single complex lens.
Solution Approach 2:
The patent employs lenses with different refractive indices and Abbe numbers, including plastic and glass materials. This composite material approach allows each lens element to contribute differently to chromatic aberration correction and overall optical performance, achieving superior image quality that cannot be obtained with a single material type.
2Measurement precision
If the optical system is designed for high resolution, then the image quality improves, but the system size increases
Solution Approach 1:
The patent employs aspheric surfaces on multiple lens elements, replacing traditional spherical surfaces. This allows for more efficient control of light paths and aberrations, achieving high resolution imaging with a more compact lens configuration that reduces overall system volume while maintaining optical performance.
Solution Approach 2:
The optical system achieves compact size through careful optimization of multiple parameters including refractive indices, Abbe numbers, surface curvatures, and thicknesses of each lens element. By adjusting these parameters within specific ranges, the system maintains high resolution capability while minimizing the total optical path length and physical dimensions.
3Measurement precision
If more lens elements are added to improve image quality, then the resolution and aberration correction improve, but the manufacturing cost increases
Solution Approach 1:
The patent specifies that the first lens is made of plastic material, which is more cost-effective and easier to manufacture than glass. Plastic lenses can be molded with aspheric surfaces directly, reducing manufacturing complexity and cost while still achieving the required optical performance for the first element in the six-lens system.
Solution Approach 2:
The patent provides specific parameter ranges for each lens element (refractive indices, Abbe numbers, surface curvatures, thicknesses) that optimize the balance between manufacturing feasibility and optical performance. These constrained parameter ranges enable manufacturers to produce the lenses with standard processes while achieving high image quality, avoiding the need for expensive custom manufacturing.
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 optical lens configuration achieves high-quality images with reduced size and cost, effectively addressing the limitations of conventional systems by minimizing chromatic aberration and distortion while maintaining high resolution.
Implementation Method 1
a first lens L1 having positive refractive power, a second lens L2 having negative refractive power, a third lens L3 having positive refractive power, a fourth lens L4 having negative refractive power, a fifth lens L5 having positive refractive power, and a sixth lens L6 having negative refractive power
Data Source
AI summary
This present invention provides an optical lens, which includes, in order from an object side to an image-forming side, a first lens group having positive refraction power and a second lens group having negative refraction power. The first lens group comprises a first lens, a second lens, and a third lens. The second lens group comprises a fourth lens, a fifth lens, and a sixth lens. The first lens is a plastic lens, the fourth lens is a convex-concave lens, and the sixth lens is an aspheric lens.