Five-Element Camera Lens Design for Large Aperture and Ultra-Thin Form Factor

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Solution Overview

Problem

Current camera lenses for handheld devices and imaging devices face challenges in achieving optimal optical performance, particularly in meeting design requirements for large aperture, wide angle, and ultra-thin configurations while maintaining good imaging quality.

Innovation Solution

A five-piece camera optical lens design is proposed, comprising lenses with specific refractive powers and curvature radii, along with constraints on focal lengths and thicknesses, to enhance optical performance and meet the requirements of a large aperture, wide angle, and ultra-thin form factor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a five-piece lens structure is used to improve optical performance, then imaging quality is improved, but the lens structure cannot meet design requirements of large aperture, ultra-thin and wide angle

Engineering Contradiction:

Improveimaging qualityVSAvoiddesign requirements fulfillment

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by optimizing the focal lengths, curvature radii, and thicknesses of the five lens elements. Specific parameter ranges are defined (e.g., 0.65≤f1/f≤0.85, -40.00≤f3/f≤-20.00) to achieve large aperture (F/2.2 or smaller), wide angle (75° or larger), and ultra-thin (TTL/IH≤1.20) characteristics while maintaining good optical performance

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If traditional three-piece or four-piece lens structure is used, then the structure is simpler, but imaging quality is insufficient for high pixel photosensitive devices

Engineering Contradiction:

Improvelens structure complexityVSAvoidimaging quality

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent applies segmentation by dividing the optical system into five distinct lens elements with specific refractive power distributions (positive, negative, negative, positive, negative). This segmentation allows each element to contribute to correcting specific aberrations, achieving superior imaging quality for high pixel photosensitive devices while managing complexity through systematic design

Inventive Principle:

Principle #1Segmentation

3Ease of manufacture

If focal length and lens spacing are not optimized, then design is simpler, but large aperture and wide angle requirements cannot be met

Engineering Contradiction:

Improvedesign simplicityVSAvoidaperture and angle performance

Core Design Contradiction:

Ease of manufactureVSDuration of action of stationary object

Solution Approach 1:

The patent systematically optimizes multiple parameters including focal lengths (f1, f2, f3, f4, f5), curvature radii (R1-R10), and thicknesses (d1-d9) within specific ranges. These parameter changes enable the lens to achieve large aperture (F/2.2 or smaller), wide angle (75° or larger), and ultra-thin (TTL/IH≤1.20) characteristics while maintaining manufacturing feasibility

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 performance, a large aperture, a wide angle, and ultra-thinness, making it suitable for high-pixel CCD and CMOS camera lenses, effectively addressing the limitations of existing lens structures.