Lens Module Stepped Barrel Alignment for AR Miniaturization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Miniaturization of AR glasses poses challenges in maintaining acceptable optical performance due to minute errors during assembly, making it difficult to guarantee consistent performance at reduced sizes.
Innovation Solution
A lens module design featuring a first lens barrel with a threaded and stepped portion on its outer surface and a second lens barrel with corresponding internal features, allowing for precise alignment and adjustment of optical axes and lens distances through screwing, which compensates for decentering and tilting issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the lens and lens barrel is reduced to miniaturize AR glasses, then the size and weight are reduced, but optical performance varies greatly due to minute errors during assembly
Solution Approach 1:
The patent applies preliminary action by providing a predetermined alignment structure between the first and second lens barrels. The alignment mark on the first lens barrel corresponds to a specific position on the second lens barrel, ensuring that when the lens barrels are assembled, the optical axes are automatically aligned without requiring high-precision manual adjustment during assembly. This preliminary design compensates for the difficulty of achieving high precision in miniaturized assembly.
2Volume of moving object
If the size of the lens module is reduced, then miniaturization is achieved, but it becomes difficult to guarantee acceptable optical performance
Solution Approach 1:
The alignment mark structure is designed in advance to ensure reliable optical performance. By pre-establishing the correspondence between the alignment mark position and the optical axis position, the patent ensures that even in miniaturized versions, the optical performance remains consistent and reliable across different assembly batches.
Solution Approach 2:
The patent replaces complex mechanical adjustment mechanisms with a simpler alignment mark system. Instead of requiring precision mechanical adjustments during assembly, the design uses visual or positional alignment of marks to achieve the same effect, which is more reliable and easier to implement in miniaturized devices.
3Ease of manufacture
If minute errors occur during assembly of miniaturized lens modules, then manufacturing becomes easier, but optical performance varies greatly
Solution Approach 1:
The alignment mark is predetermined on the first lens barrel, providing a clear guide for assembly. This preliminary marking system allows assembly workers to easily align the lens barrels without requiring high skill or specialized equipment, making assembly easier while ensuring precise optical axis alignment through the pre-designed mark correspondence.
Data Source
AI summary
A lens module includes a first lens barrel in which at least one lens is disposed and including a first threaded portion and a first stepped portion on an outer circumferential surface of the first lens barrel; and a second lens barrel in which at least one lens is disposed and including a second threaded portion and a second stepped portion on an inner circumferential surface of the second lens barrel, wherein the first lens barrel and the second lens barrel are coupled to each other by fitting the first stepped portion and the second stepped portion to each other and screwing the first threaded portion and the second threaded portion to each other.