Lens Module with Inclined Distance Maintenance Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lens modules in portable devices face challenges in accurately aligning lenses and minimizing flare phenomena due to internal reflections, which degrade image resolution.
Innovation Solution
A lens module design featuring a distance maintenance member with inclined surfaces on its inner circumferential surface to adjust light and reduce ghost and flare phenomena, combined with a lens barrel made of polyarylate (PAR) material with the same linear expansion coefficient as the lenses, and nonferrous metal components to minimize alignment issues and internal reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If lenses are aligned by the lens barrel structure, then lens alignment is achieved, but manufacturing precision deteriorates due to requiring same diameter or common machining errors
Solution Approach 1:
The invention divides the alignment function into separate components: the lens barrel provides structural support while the distance maintenance member with inclined surfaces provides the alignment function. This segmentation allows each component to be manufactured independently with standard tolerances while achieving precise lens alignment through the geometric relationship between the inclined surfaces and lens positions.
Solution Approach 2:
The distance maintenance member acts as an intermediary component between the lens barrel and the lenses. It features inclined surfaces that guide and align the lenses during assembly, eliminating the need for lenses to be manufactured with identical diameters or require complex machining processes for alignment.
2Measurement precision
If multiple lenses are included in the lens module, then image resolution is improved, but flare phenomenon increases due to internal reflection
Solution Approach 1:
The invention converts the harmful internal reflections into beneficial alignment guidance. The inclined surfaces on the distance maintenance member are designed at specific angles that redirect potentially harmful reflected light away from the image sensor while simultaneously providing mechanical alignment for the lenses. This transforms the reflection phenomenon from a source of flare into a useful alignment mechanism.
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 aligns lenses, reduces flare and ghost phenomena, and minimizes deformation due to temperature changes, thereby enhancing image resolution and maintaining lens alignment across varying temperatures.
Implementation Method 1
an inner circumferential surface of the hole includes a plurality of inclined surfaces that are respectively inclined at predetermined angles with respect to an optical axis
Implementation Method 2
The lens barrel may be formed of a material having the same linear expansion coefficient as those of the first and second lenses
Data Source
AI summary
A lens module includes a first lens, a second lens, and a distance maintenance member disposed between the first lens and the second lens, the distance maintenance member having a hole for adjusting an amount of light. An inner circumferential surface of the hole includes a plurality of inclined surfaces that are respectively inclined at predetermined angles with respect to an optical axis.