Six-Lens Camera Module with Negative-Positive Power Distribution

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Solution Overview

Problem

Existing camera lenses with 6 small lenses struggle to achieve wide-angle views over 110° and excellent optical properties due to insufficient refractive power distribution and miniaturization, particularly with the first, second, and fourth lenses, leading to suboptimal performance in terms of view angle and total track length.

Innovation Solution

A camera lens design comprising 6 lenses with specific refractive power distributions and aspherical surfaces, where the first lens has negative power, the second and third lenses have positive power, the fourth and fifth lenses have negative and positive power respectively, and the sixth lens has negative power, with optimized focal length and curvature radius conditions to achieve wide-angle and miniaturization while correcting aberrations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the camera lens uses conventional 6-lens arrangement with insufficient refractive power distribution, then the structure is simple to manufacture, but the view angle cannot exceed 105° and miniaturization is limited

Engineering Contradiction:

Improveview angleVSAvoidrefractive power distribution complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by optimizing the refractive power distribution across the 6 lenses, specifically setting the first lens with negative refractive power (f1/f between -9.00 to -3.00) and the fourth lens with negative refractive power (f4/f between -10.00 to -6.00), while adjusting focal lengths and curvature radii to achieve a view angle exceeding 110° and miniaturization with TTL under 5.5mm

Inventive Principle:

Principle #35Parameter changes

2Length of stationary object

If the fourth lens uses conventional shape design, then manufacturing is easier, but the view angle is limited to 105° and TTL cannot be reduced below 10.68 mm

Engineering Contradiction:

Improvetotal track lengthVSAvoidlens shape complexity

Core Design Contradiction:

Length of stationary objectVSEase of manufacture

Solution Approach 1:

The patent applies spheroidality by designing the fourth lens with specific curvature radius ratios ((R7+R8)/(R7-R8) between 5.00 to 5.00) and incorporating aspherical surfaces on multiple lenses to optimize light path control, enabling TTL reduction to under 5.5mm while achieving a view angle over 110°

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Adaptability or versatility

If the first, second and fourth lenses use conventional refractive power distribution, then design is simpler, but the view angle cannot exceed 98.2° and TTL remains above 18.601 mm

Engineering Contradiction:

Improveview angleVSAvoidtotal track length

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The patent applies local quality by assigning specific refractive power characteristics to different lenses: the first lens has negative refractive power for wide-angle correction, the second and third lenses have positive refractive power for focusing, the fourth lens has negative refractive power for aberration correction, and the fifth and sixth lenses have positive and negative powers respectively, creating an optimized local optical property distribution that achieves 119° view angle with 5.5mm TTL

Inventive Principle:

Principle #3Local quality

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 a wide-angle view of over 119° with a total track length of less than 5.5 mm, ensuring excellent optical properties and miniaturization, as demonstrated by the embodiments meeting specific conditions and showing improved longitudinal aberration, lateral color, field curvature, and distortion performance.