Five-Lens Camera Optical System Aberration Correction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing camera lenses with five lenses suffer from inadequate refractive power, improper lens shapes, and incorrect axial distances, leading to insufficient wide-angle and ultra-thin performance with insufficient luminous flux.

Innovation Solution

A camera lens design with five lenses, including a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power, optimized by specific conditions for focal distances, curvature radii, and axial distances to achieve improved optical properties, including a glass plate between the fifth lens and the imaging plane.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the refractive power of the first and third lenses is increased and their shapes are optimized, then the wide-angle performance and luminous flux are improved, but the manufacturing complexity and precision requirements increase

Engineering Contradiction:

Improveluminous fluxVSAvoidlens shape precision

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by optimizing the refractive power values and curvature radii of the first and third lenses within specific ranges. The first lens has positive refractive power with object-side curvature radius R1 and image-side curvature radius R2, while the third lens has negative refractive power with object-side curvature radius R5 and image-side curvature radius R6. These parameter optimizations enable improved luminous flux and wide-angle performance while maintaining manufacturability through defined parameter ranges.

Inventive Principle:

Principle #35Parameter changes

2Length of moving object

If the axial distance between the fourth and fifth lenses is adjusted to achieve ultra-thin profile, then the TTL/IH ratio is reduced, but the optical performance and aberration correction may deteriorate

Engineering Contradiction:

Improveoptical lengthVSAvoidaberration correction

Core Design Contradiction:

Length of moving objectVSReliability

Solution Approach 1:

The patent resolves this contradiction through parameter changes by defining specific ranges for the axial distance d8 between the fourth and fifth lenses relative to the focal length f. The condition 0.12 ≤ d8/f ≤ 0.18 optimizes the optical length to achieve ultra-thin profile (TTL/IH ≤ 1.35) while maintaining proper aberration correction and optical performance through the carefully selected distance parameter.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies local quality by assigning specific optical properties to the fourth and fifth lenses at their localized positions. The fourth lens has positive refractive power with specific curvature radii (R7, R8) and the fifth lens has negative refractive power with specific curvature radii (R9, R10). This localized optimization of lens properties at specific positions enables the system to achieve both compact size and proper aberration correction.

Inventive Principle:

Principle #3Local quality

3Reliability

If the lens shapes are optimized to achieve better aberration correction, then the optical properties are improved, but the manufacturing difficulty increases

Engineering Contradiction:

Improveaberration correctionVSAvoidlens shaping

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies parameter changes by defining specific curvature radius ranges for each lens surface that balance aberration correction with manufacturability. The curvature radii R1 through R10 are constrained within practical ranges that achieve the required optical performance while remaining feasible for standard manufacturing processes. This approach optimizes the shape parameters to simultaneously satisfy optical and manufacturing requirements.

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, such as a total angle of view up to 82°, a high F-number of 2.2, and improved aberration correction, resulting in ultra-thin and wide-angle lenses with high luminous flux.