Lens Module Barrel Wall Thickness Reduction via Extracted Stop

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Solution Overview

Problem

Existing lens modules face challenges in miniaturization due to increased height and weight caused by the thickness of the light hole on the barrel wall, which complicates production and affects image quality by allowing reflective light.

Innovation Solution

A lens module design featuring a stop clamped between the barrel wall and the lens group, with a hollow ring stop that reduces barrel thickness and minimizes light reflection, using a lug extension to align the optical axis with the light hole, thereby reducing barrel length and glare.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a light hole is created on the first barrel wall, then light can pass through for the lens, but the barrel wall thickness is increased, leading to increased height and weight of the lens module

Engineering Contradiction:

Improvelight transmissionVSAvoidbarrel wall thickness

Core Design Contradiction:

Illumination intensityVSLength of stationary object

Solution Approach 1:

The patent extracts the light-blocking function from the barrel wall structure by introducing a separate stop component. The stop is clamped between the lens group and the first barrel wall, creating a light hole without requiring the barrel wall itself to be thick. This separates the structural support function (barrel wall) from the light control function (stop), resolving the contradiction between light transmission and barrel wall thickness.

Inventive Principle:

Principle #2Taking out (Extraction)

2Illumination intensity

If the barrel wall thickness is increased to create a light hole, then light transmission is enabled, but the height and weight of the entire lens module is increased

Engineering Contradiction:

Improvelight transmissionVSAvoidlens module weight

Core Design Contradiction:

Illumination intensityVSWeight of stationary object

Solution Approach 1:

The light control function is extracted from the barrel wall and implemented by a separate stop component. This allows the barrel wall to maintain minimal thickness while the stop (made of lightweight materials like black anodized aluminum or black painted plastic) handles the light blocking function, thereby enabling light transmission without increasing the overall lens module weight.

Inventive Principle:

Principle #2Taking out (Extraction)

3Illumination intensity

If the barrel wall thickness is increased to create a light hole, then light transmission is enabled, but production difficulty is increased

Engineering Contradiction:

Improvelight transmissionVSAvoidlens barrel production

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The patent separates the light control function from the barrel wall manufacturing process. The stop component is independently manufactured and then clamped between the lens group and the first barrel wall during assembly. This allows the barrel wall to be produced with standard thickness without complex light hole machining, while the stop (a simple ring structure) is easily manufactured and installed, significantly improving production ease.

Inventive Principle:

Principle #2Taking out (Extraction)

4Illumination intensity

If a traditional light hole structure is used on the barrel wall, then light transmission is achieved, but reflective light affects image quality

Engineering Contradiction:

Improvelight transmissionVSAvoidlight reflection

Core Design Contradiction:

Illumination intensityVSObject-generated harmful factors

Solution Approach 1:

The patent addresses light reflection by introducing a stop component with a light-absorbing surface (black anodized or black painted). This stop structure converts the harmful reflective light into absorbed light, preventing glare and improving image quality. The black coating on the stop transforms the problem of light reflection into a beneficial light absorption effect.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 design enhances image quality by minimizing glare and simplifies lens barrel production by reducing barrel length and thickness, increasing yield and reducing production difficulties.

Implementation Method 1

The stop 3 creates a light hole 4... minimizing light reflection

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS10114192B2Lens module

Publication Date: 2018.10.30 AAC OPTICS SOLUTIONS PTE LTD

AI summary

The present disclosure discloses a lens module. The lens module includes a lens barrel and a lens group. The lens group is installed inside the lens barrel. The lens barrel includes a first barrel wall extended horizontally and a second barrel wall bended and extended from the first barrel wall. The lens module includes also a stop installed inside the lens barrel. The stop is installed inside the lens barrel and clamped between the first barrel wall and the lens group. The stop and the lens group are lined up in turn from object side to image side.