Six-Lens Optical System for Mobile Camera Resolution and Weight
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Solution Overview
Problem
There is a challenge in designing camera modules for mobile communications terminals that balance high resolution and performance with the need for miniaturization and lightweight construction.
Innovation Solution
The optical system comprises six lenses with specific refractive powers and surface configurations, including convex and concave surfaces, along with a stop positioned in front of the object-side surface of the first lens, optimizing the radius of the stop and overall focal length to achieve improved aberration correction, brightness, and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If camera modules are miniaturized and lightened, then device size and weight are reduced, but resolution and performance are compromised
Solution Approach 1:
The patent employs a composite lens structure combining plastic and glass materials with specific refractive indices and Abbe numbers. The plastic lens (n=1.67, v=26) and glass lens (n=1.5, v=35) are selected to optimize both weight reduction and optical performance, achieving high resolution while maintaining miniaturization and lightweight design requirements
Solution Approach 2:
The patent optimizes multiple parameters including focal lengths (f1=2.85mm, f2=-5.3mm, f3=28.86mm, f4=741.25mm, f5=-12.35mm, f6=32.76mm), stop radius (SD=0.7mm), and various surface curvatures to achieve the desired balance between resolution, brightness, and compact size. The conditional expressions define precise parameter relationships to resolve the contradiction
2Manufacturing precision
If five or more lenses are configured to achieve high resolution, then image quality improves, but device complexity increases
Solution Approach 1:
The patent divides the optical system into six distinct lens elements with specific functions: first lens (positive power for light gathering), second lens (negative power for aberration correction), third lens (positive power for focusing), fourth lens (positive power for correction), fifth lens (negative power for correction), and sixth lens (positive power for final focusing). Each lens is segmented with specific refractive indices and surface curvatures to collectively achieve high resolution while managing complexity through functional specialization
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 configuration effectively improves aberration performance, achieves high degrees of brightness and resolution, and meets the requirements for miniaturization and lightweight design in mobile camera modules.
Implementation Method 1
a first lens having refractive power; a second lens having refractive power; a third lens having refractive power... The first to sixth lenses may be sequentially disposed from an object side to an image side
Data Source
AI summary
An optical system includes: a first lens having refractive power; a second lens having refractive power; a third lens having refractive power and comprising an image-side surface which is convex in a paraxial region; a fourth lens having refractive power; a fifth lens having refractive power and comprising an image-side surface which is concave in the paraxial region; a sixth lens having refractive power; and a stop disposed in front of an object-side surface of the first lens. The first to sixth lenses are sequentially disposed from an object side. A radius of the stop SD and an overall focal length of the optical system f satisfy: 0.2<SD/f<0.6. An aberration improvement effect and high degrees of resolution and brightness may be obtained.