Six-Element Optical Camera Lens for Large-Aperture Ultra-Wide Imaging

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Solution Overview

Problem

Conventional six-element lens structures for camera lenses face challenges in achieving both large aperture and ultra-wide angle while maintaining excellent optical performance, particularly in small-sized camera lenses for smartphones and digital cameras.

Innovation Solution

A six-element optical camera lens design with specific refractive indices, focal lengths, and curvature radii for each lens element, along with controlled thickness and distance relationships, to optimize optical performance and meet the requirements of large aperture and ultra-wide angle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional six-element lens structure is used, then excellent optical performance is achieved, but the design requirements for large apertures and ultra-wide angles are not satisfied

Engineering Contradiction:

Improveoptical performanceVSAvoidlarge aperture and ultra-wide angle capability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by optimizing the refractive indices, focal lengths, and curvature radii of the six lens elements to specific ranges. The first lens has a refractive index of 1.70≤n1≤2.20, the second lens has -2.30≤f2/f≤-1.60, and the sixth lens has -1.80≤R11/R12≤-0.50. These parameter adjustments enable the lens to achieve both excellent optical performance and large aperture (Fno≤2.00) with ultra-wide angle (FOV≥196.00°) characteristics.

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If the pixel size of imaging devices decreases, then more pixels can be integrated, but the lens structure becomes more challenging to design for maintaining image quality

Engineering Contradiction:

Improvepixel densityVSAvoidimaging quality

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent divides the optical system into six distinct lens elements, each with specific refractive forces and focal lengths. This segmentation allows precise control of light paths to maintain high imaging quality even when imaging devices have smaller pixel sizes and higher pixel densities. The six-element structure enables fine-tuned optimization for each element's contribution to overall image quality.

Inventive Principle:

Principle #1Segmentation

3Reliability

If the lens structure is optimized for excellent optical performance, then imaging quality improves, but the lens may not satisfy compact size requirements

Engineering Contradiction:

Improveimaging qualityVSAvoidlens length

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The patent employs dynamic optimization of the lens structure by carefully controlling the spacing between elements (d2, d4, d6, d8) and the thickness of each element (d1, d3, d5, d7, d9). The ratio constraints such as d5/d6≤30.00 and d7+d8+d9≥-f45/4.00 ensure the lens maintains excellent optical performance while achieving a compact total track length, making it suitable for mobile devices with space constraints.

Inventive Principle:

Principle #15Dynamics

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 lens design achieves excellent optical performance with a large aperture and ultra-wide angle, suitable for mobile phone camera lenses, Web camera lenses, and in-vehicle camera lenses, while maintaining a compact size.