Six-Lens Camera System with Aspherical Elements for Wide-Angle Miniaturization

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Solution Overview

Problem

Existing camera lenses with 6 small lenses struggle to achieve wide-angle views over 100° and miniaturization while maintaining excellent optical properties due to insufficient refractive power distribution and lens shapes, leading to suboptimal performance in terms of total track length and image quality.

Innovation Solution

A camera lens design comprising 6 lenses with specific refractive power and shape conditions, including aspherical surfaces, where the first lens has negative refractive power, the second and third lenses have positive refractive power, the fourth and fifth lenses have negative and positive refractive power respectively, and the sixth lens has negative refractive power, with a glass plate between the sixth lens and the image surface, optimizing focal lengths and curvature radii to achieve wide-angle and miniaturization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the camera lens uses conventional 6-lens arrangement with standard refractive power distribution, then the basic optical function is maintained, but the view angle cannot exceed 98.2° and total track length cannot be reduced below 18.601 mm

Engineering Contradiction:

Improveview angleVSAvoidtotal track length

Core Design Contradiction:

Measurement precisionVSLength of moving object

Solution Approach 1:

The patent applies parameter changes by precisely controlling the refractive power distribution (f1/f, f2/f, f4/f ratios) and curvature radii (R1, R2, R3, R4, R7, R8) of each lens element. By optimizing these parameters within specific ranges, the view angle exceeds 100° while total track length is reduced to 10.68 mm, simultaneously resolving the contradiction between view angle and compact size.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs aspherical surfaces on multiple lens elements (first, second, fourth, and fifth lenses) to correct optical aberrations. The aspherical coefficients (A4, A6, A8, A10, A12, A14) are optimized to maintain excellent optical properties while achieving the wide view angle and compact dimensions, effectively resolving the contradiction between view angle expansion and aberration control.

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Measurement precision

If the refractive power distribution and lens shapes are optimized for wide-angle performance, then view angle increases, but optical aberrations worsen

Engineering Contradiction:

Improveview angleVSAvoidoptical quality

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent uses aspherical surfaces on the first, second, fourth, and fifth lenses with optimized aspherical coefficients to correct spherical aberration, coma, and other off-axis aberrations. This allows the view angle to exceed 100° while maintaining excellent optical quality, resolving the contradiction between wide-angle performance and aberration control.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The patent applies different refractive indices (nd1=1.5439, nd2=1.5439, nd3=1.5439, nd4=1.6614, nd5=1.5439, nd6=1.6355) and Abbe numbers (v1=55.95, v2=55.95, v3=55.95, v4=20.41, v5=55.95, v6=23.97) to different lens elements based on their specific positions and functions. This localized optimization of material properties enables each lens to contribute optimally to aberration correction while maintaining the wide view angle.

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 100° with a compact size and excellent optical properties, correcting aberrations and ensuring high image quality by adhering to specific refractive power and shape conditions.