Seven-Lens Camera Module Optimizing Brightness and Thickness
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Solution Overview
Problem
Existing camera lenses with seven pieces, designed for high-pixel camera elements like CCD and CMOS, face challenges in achieving sufficient ultra-thin and high-luminous flux wide angle performance due to inadequate refractive power distribution and improper shape of the fifth lens, leading to insufficient brightness and thickness.
Innovation Solution
A camera lens configuration comprising seven lenses with specific refractive power distributions and aspheric shapes, including a glass plate or optical filter, arranged to meet conditions that optimize focal distances, Abbe numbers, and curvature radii to correct aberrations and achieve ultra-thin, wide-angle performance with high luminous flux.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the camera lens uses conventional seven-piece configuration with insufficient refractive power distribution in the fifth lens, then the lens structure is simple, but the brightness and ultra-thin performance are insufficient
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive power distribution of the fifth lens and adjusting its shape parameters. Specifically, the fifth lens is designed with positive refractive power and specific curvature radii (R9 and R10) that satisfy particular mathematical relationships, transforming the lens from conventional design to achieve Fno≤1.8 and ultra-thin profile while maintaining the seven-piece configuration.
Solution Approach 2:
The patent applies local quality by giving different functional characteristics to different lenses in the seven-piece configuration. The fifth lens is specifically designed with positive refractive power and optimized shape to provide high luminous flux, while other lenses have different refractive powers (positive or negative) tailored to their specific positions and functions in the optical system.
2Length of moving object
If the fifth lens has improper shape and insufficient refractive power, then the manufacturing is easier, but the ultra-thin and wide angle performance is insufficient
Solution Approach 1:
The patent applies spheroidality by designing the fifth lens with specific curved surfaces characterized by curvature radii R9 and R10 that satisfy particular mathematical relationships. The aspheric shapes of the lenses, including the fifth lens, are optimized to achieve ultra-thin profile while maintaining precise optical performance and wide angle capability (2ω≥75°).
Solution Approach 2:
The patent transforms the fifth lens shape parameters to achieve ultra-thin performance. The curvature radii R9 and R10 are specifically designed to satisfy mathematical relationships that enable the lens to be ultra-thin while maintaining the required optical functions, including wide angle coverage and high luminous flux.
3Shape
If the lens configuration does not optimize refractive power distribution, then the design is simpler, but the total angle of view and F-number performance are insufficient
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive power distribution across all seven lenses. The fifth lens is assigned positive refractive power with specific curvature radii that satisfy mathematical relationships, while other lenses have different refractive powers. This parameter optimization enables the system to achieve wide angle performance (2ω≥75°) and low F-number (Fno≤1.8).
Solution Approach 2:
The patent applies segmentation by dividing the optical system into seven distinct lenses, each with specific refractive power (positive or negative) and shape characteristics. The fifth lens is segmented with positive refractive power and optimized shape to provide high luminous flux, while other lenses are segmented with different functions to collectively achieve wide angle and ultra-thin performance.
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 enables the production of camera lenses with excellent optical properties, including a total angle of view greater than 75°, a thickness-to-image height ratio less than 1.55, and a F-number less than 1.8, effectively addressing the limitations of previous designs.
Implementation Method 1
a first lens with positive refractive power; a second lens with negative refractive power; a third lens with negative refractive power; a fourth lens with positive refractive power, a fifth lens with positive refractive power; a sixth lens with positive or negative refractive power, a seventh lens with negative refractive power
Data Source
AI summary
A camera lens is disclosed. The camera lens includes seven piece ultra-thin and high-luminous flux wide angle lenses with excellent optical properties as follows: a first lens with positive refractive power; a second lens with negative refractive power; a third lens with negative refractive power; a fourth lens with positive refractive power; a fifth lens with positive refractive power; a sixth lens with positive or negative refractive power, and a seventh lens with negative refractive power which are arranged in an order from an object side to an image side. The camera lens satisfies specified conditions.