Six-Lens Camera Module Optimizing Brightness and Thickness

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Solution Overview

Problem

Existing camera lenses with six-piece configurations for mobile phone and webcam applications face challenges in achieving ultra-thin, high-luminous flux, and wide-angle optics with insufficient refractive power distribution and improper lens shapes, leading to suboptimal brightness and thickness.

Innovation Solution

A camera lens design comprising six lenses with specific refractive power distributions and aspheric shapes, meeting conditions for focal distances and curvature radii to optimize optical performance, including a glass plate or optical filter between the sixth lens and the imaging surface, ensuring a total optical length to image height ratio ≤1.45, a wide angle of view ≥76°, and a low F-number ≤1.85.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the refractive power distribution of the first lens and the second lens is insufficient and the shape of the first and fourth lenses are improper, then the lens configuration is simpler, but the brightness (Fno) is not sufficiently high

Engineering Contradiction:

Improvebrightness (Fno)VSAvoidrefractive power distribution and lens shape complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by precisely controlling the refractive power distribution (f1/f and f2/f ratios) and curvature radius relationships (R1, R2, R7, R8) of the lenses. By optimizing these numerical parameters within specific ranges, the design achieves Fno≤1.85 brightness without increasing structural complexity, resolving the contradiction between brightness and device complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs aspheric surface design for the lenses, particularly optimizing the curvature of the first and fourth lenses. The aspheric shapes allow for better light control and higher brightness (Fno≤1.85) while maintaining a compact six-piece structure, thus improving illumination intensity without proportionally increasing device complexity

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Length of moving object

If the refractive power distribution of the first lens and the second lens is insufficient and the shape of the first lens and the fourth lens are improper, then the lens configuration is simpler, but the lens is not sufficiently ultra-thin

Engineering Contradiction:

Improvethickness (TTL/IH ratio)VSAvoidrefractive power distribution and lens shape complexity

Core Design Contradiction:

Length of moving objectVSDevice complexity

Solution Approach 1:

The patent achieves ultra-thin design (TTL/IH≤1.45) by optimizing key parameters including the focal length ratios (f1/f=0.80-0.95, f2/f=-5.00 to -2.00) and curvature radius relationships. These parameter optimizations allow the six-piece lens to be compact without requiring overly complex internal structures, resolving the contradiction between thinness and design complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The aspheric surface design of the lenses, particularly the first and fourth lenses with optimized curvature radii, enables better light path control in a shorter distance. This allows the achievement of ultra-thin profile (TTL/IH≤1.45) while maintaining optical performance, balancing thickness reduction with manageable design complexity

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Shape

If the camera lens is designed with six piece lenses for wide angle and ultra-thin requirements, then the angle of view is wide, but the refractive power distribution is insufficient leading to improper lens shapes

Engineering Contradiction:

Improveangle of view (2ω)VSAvoidrefractive power distribution and lens shape configuration

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

The patent achieves wide angle of view (2ω≥76°) by optimizing the refractive power distribution parameters (f1/f and f2/f ratios) and curvature radius relationships of the six lenses. By carefully controlling these parameters, the design achieves wide angle without requiring excessive structural complexity or improper lens shapes, resolving the contradiction between angle of view and device complexity

Inventive Principle:

Principle #35Parameter changes

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 design achieves excellent optical properties, including ultra-thinness, high luminosity, and a wide angle of view, effectively addressing the limitations of previous designs by enhancing aberration correction and brightness while maintaining a compact form.