Eight-Lens Optical Layout for Compact Mobile Cameras
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Solution Overview
Problem
Mobile terminals face challenges in achieving high-performance camera capabilities due to space limitations, necessitating an optical imaging system that enhances camera performance without increasing size.
Innovation Solution
An optical imaging system comprising eight lenses, including specific refractive powers and surface configurations, is designed to optimize image quality and reduce size, with lenses arranged along the optical axis from the object side to the imaging plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses is increased to improve image quality, then optical performance is improved, but the overall size of the camera system increases
Solution Approach 1:
The camera system is divided into eight distinct lens elements (L1-L8), each with specific refractive powers and surface curvatures. This segmentation allows complex optical functions to be distributed across multiple specialized components, achieving high image quality while maintaining a compact overall structure through optimized individual element dimensions.
Solution Approach 2:
The patent utilizes both convex and concave surfaces on lens elements, as well as varying refractive powers (positive and negative), to manipulate light paths in multiple dimensions. This dimensional approach to optical design enables compact lens arrangement that reduces overall camera size while maintaining sophisticated image quality correction capabilities.
2Measurement precision
If lens elements with specific surface configurations are used to improve optical performance, then image quality is improved, but manufacturing complexity increases
Solution Approach 1:
Each lens element (L1-L8) is assigned specific local properties including convex or concave object-side and image-side surfaces, and specific refractive powers. For example, L1 has a convex object-side surface and positive refractive power, while L2 has a concave object-side surface and negative refractive power. This localized optimization of surface configurations achieves superior image quality while keeping each individual lens element manufacturable through standard optical manufacturing processes.
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 system achieves improved image quality and performance in a compact form, addressing the space constraints of mobile terminals while maintaining optical efficiency.
Implementation Method 1
An optical imaging system includes a first lens having a positive refractive power; a second lens having a refractive power; a third lens having a refractive power; a fourth lens having a refractive power and a concave image-side surface; a fifth lens having a refractive power; a sixth lens having a refractive power; a seventh lens having a refractive power; and an eighth lens having a refractive power and a concave object-side surface, wherein the first to eighth lenses are sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system.
Data Source
AI summary
An optical imaging system includes a first lens having a positive refractive power; a second lens having a refractive power; a third lens having a refractive power; a fourth lens having a refractive power and a concave image-side surface; a fifth lens having a refractive power; a sixth lens having a refractive power; a seventh lens having a refractive power; and an eighth lens having a refractive power and a concave object-side surface, wherein the first to eighth lenses are sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system.