Wide-Viewing-Angle Lens Assembly Aberration Correction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional wide-viewing-angle imaging lenses face challenges in achieving a balance between a large field of view, high image quality, and reduced total track length, often suffering from aberrations and sensitivity issues due to the limited correction of refractive power and chromatic aberrations.

Innovation Solution

A wide-viewing-angle imaging lens assembly is designed with a specific configuration of lens elements, including a front lens group with a first lens element of negative refractive power and a rear lens group comprising three lens elements with positive and negative refractive powers, optimized by specific focal length and curvature relations to enhance the field of view, correct aberrations, and reduce sensitivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If a conventional imaging lens assembly uses a front lens group with negative refractive power and a rear lens group with positive refractive power to achieve a wide field of view, then the field of view is enlarged, but the aberrations of the system cannot be favorably corrected and the total track length is increased

Engineering Contradiction:

Improvefield of viewVSAvoidaberration correction

Core Design Contradiction:

Area of stationary objectVSManufacturing precision

Solution Approach 1:

The lens assembly is divided into a front lens group and a rear lens group with distinct functions. The front lens group (with negative refractive power) is primarily responsible for field of view enlargement, while the rear lens group (with positive refractive power) focuses on aberration correction. This segmentation allows each group to be optimized for its specific function without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the lens system are assigned different optical properties. The front lens group uses negative refractive power to expand the field of view, while the rear lens group uses positive refractive power to correct aberrations. This local differentiation of optical characteristics enables simultaneous achievement of wide field of view and good image quality.

Inventive Principle:

Principle #3Local quality

2Area of stationary object

Engineering Contradiction:

Improvefield of viewVSAvoidtotal track length

Core Design Contradiction:

Area of stationary objectVSLength of stationary object

Solution Approach 1:

The lens elements are arranged in a compact nested configuration where the front lens group with negative refractive power is positioned closer to the object side, and the rear lens group with positive refractive power is positioned closer to the image side. This nested arrangement allows the optical paths to be folded efficiently, reducing the overall track length while maintaining the wide field of view capability.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Device complexity

If the rear lens group has only one lens element to reduce complexity, then the device complexity is reduced, but the aberrations of the system cannot be favorably corrected

Engineering Contradiction:

Improvenumber of lens elementsVSAvoidaberration correction

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The stop is positioned between the front lens group and the rear lens group, acting as an intermediary element that helps control the light paths and reduces the burden on the rear lens group for aberration correction. This intermediary structure allows the rear lens group to achieve good aberration correction with a reduced number of elements.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 solution effectively enlarges the field of view, improves image quality, and reduces the total track length while effectively correcting aberrations and chromatic aberrations, achieving a compact and efficient optical system.

Implementation Method 1

a front lens group, a stop, and a rear lens group. The front lens group comprises, in order from the object side to the image side: a first lens element with negative refractive power having a concave image-side surface and a second lens element

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS8743485B2Wide-viewing-angle imaging lens assembly

Publication Date: 2014.06.03 LARGAN PRECISION

AI summary

The present invention provides a wide-viewing-angle imaging lens assembly comprising, in order from an object side to an image side: a front lens group, a stop, and a rear lens group. The front lens group comprises, in order from the object side to the image side: a first lens element with negative refractive power having a concave image-side surface and a second lens element. The rear lens group comprises, in order from the object side to the image side: a third lens element with positive refractive power having a concave object-side surface and a convex image-side surface, a fourth lens element with positive refractive power having a convex object-side surface and a convex image-side surface, and a fifth lens element with negative refractive power having a concave object-side surface. Such an arrangement of optical elements can effectively enlarge the field of view of the wide-viewing-angle imaging lens assembly, reduce the sensitivity of the optical system, and obtain good image quality.