Five-Lens Imaging System for Wide Field Aberration Correction

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Solution Overview

Problem

Conventional imaging lenses struggle to achieve a wide field of view and low F-number while maintaining high optical performance, particularly in correcting aberrations at the peripheral area.

Innovation Solution

The proposed imaging lens configuration includes a first lens with negative refractive power, a second lens with a convex surface facing the object side, a third lens with positive refractive power, a fourth lens for low-profileness and aberration correction, and a fifth lens with negative refractive power and an aspheric surface, optimized by specific conditional expressions to balance refractive power and thickness for effective aberration correction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If wide field of view and low F-number are realized by strengthening refractive power, then field of view and brightness are improved, but aberration correction at peripheral area deteriorates

Engineering Contradiction:

Improvebrightness (low F-number)VSAvoidaberration correction precision

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The imaging lens is divided into five separate lens elements with different refractive powers and surface curvatures. Each lens element (first through fifth lenses) is designed to address specific aberration types, allowing the system to achieve wide field of view and low F-number while maintaining peripheral aberration correction through coordinated action of segmented components

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different lens surfaces are designed with locally optimized properties: the third lens has a convex surface facing the image side to control light ray incident angles, the fifth lens has a concave object-side surface and convex image-side surface for specific aberration correction. This local optimization of surface curvatures and refractive powers enables simultaneous achievement of wide field of view, low F-number, and high aberration correction precision

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If wide field of view is achieved by increasing refractive power, then field of view is improved, but optical performance and resolution deteriorate due to uncorrected aberrations

Engineering Contradiction:

Improvefield of viewVSAvoidoptical performance and resolution

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The five-lens segmented structure allows distribution of optical functions: first lens (positive power) for wide field of view, second lens (negative power) for astigmatism and field curvature control, third lens (convex image-side surface) for incident angle control, fourth lens for spherical and chromatic aberration, and fifth lens (negative power) for comprehensive aberration correction. This segmentation enables wide field of view with maintained optical performance

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs aspheric surfaces on multiple lens elements with specifically optimized curvature parameters and refractive indices. The aspheric coefficients are tuned to correct higher-order aberrations while maintaining wide field of view, enabling high resolution imaging across the entire field without the performance degradation that would normally accompany wide-angle designs

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If conventional lens configurations are used, then结构简单性 is maintained, but aberration correction at peripheral area and overall optical performance deteriorate

Engineering Contradiction:

Improvelens configuration simplicityVSAvoidaberration correction precision

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

Rather than using a simple single-element or two-element lens, the patent segments the optical system into five carefully designed lens elements. Each element contributes to correcting specific aberration types, and the cumulative effect achieves superior peripheral aberration correction while maintaining reasonable structural complexity for manufacturing

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent utilizes aspheric surfaces on multiple lens elements instead of simple spherical surfaces. The aspheric profiles are optimized to correct spherical aberration, coma, and other off-axis aberrations that cannot be corrected by spherical surfaces alone, thereby achieving high precision aberration correction while maintaining manufacturability through standardized aspheric fabrication processes

Inventive Principle:

Principle #14Spheroidality (Curvature)

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

This configuration achieves high-resolution imaging with a wide field of view, low-profileness, and low F-number, effectively correcting aberrations such as astigmatism, field curvature, and distortion, suitable for compact and high-performance imaging devices.