Optical Waveguide Lens Alignment Using Dummy Pattern Sensing
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Solution Overview
Problem
The alignment of optical waveguide lenses and projectors in optical waveguide display modules is often inaccurate, leading to incomplete or skewed display images, which affects image quality and user experience.
Innovation Solution
An alignment device comprising a carrying device, sensing device, first and second adjustment devices, and a processing device, which uses pattern recognition and adjustment mechanisms to align a dummy lens and projector with the optical waveguide lens, ensuring precise alignment through multiple axis adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual alignment methods are used for optical waveguide lens and projector, then device complexity is reduced, but alignment precision deteriorates leading to incomplete or skewed display images
Solution Approach 1:
A dummy lens with characteristic points is introduced as an intermediary alignment target. The sensing device detects these characteristic points to determine alignment status, serving as a mediator between the projector and optical waveguide lens. This intermediary enables precise measurement without requiring direct complex interaction between the optical components.
Solution Approach 2:
The dummy lens creates a virtual copy of the optical waveguide lens's light exit portion for alignment purposes. By projecting patterns through the dummy lens and comparing the sensed patterns with expected patterns, the system achieves precise alignment measurement without directly measuring the actual optical waveguide lens during assembly.
2Manufacturing precision
If alignment accuracy is improved through multiple adjustment devices, then image quality is enhanced, but ease of operation deteriorates due to complex adjustment procedures
Solution Approach 1:
The sensing device continuously monitors the alignment status by detecting characteristic points and comparing sensed patterns with expected patterns. This feedback information is used to automatically control adjustment devices, enabling closed-loop alignment that improves precision while reducing manual operation complexity through automated control based on real-time alignment data.
Solution Approach 2:
Manual mechanical alignment operations are replaced with automated control systems. The processing device generates control signals based on sensing results to automatically adjust the positions of adjustment devices, substituting complex manual mechanical adjustment procedures with automated electronic control that achieves higher precision with easier operation.
Data Source
AI summary
An alignment device includes a carrying device, a sensing device, a first adjustment device and a second adjustment device. The carrying device places a dummy lens or an optical waveguide lens. The dummy lens is provided with characteristic points forming a first pattern. The sensing device senses the first pattern to generate a first sensing result. The sensing device senses a second pattern generated by the light exit portion of the optical waveguide lens to generate a second sensing result. The first adjustment device adjusts the position of the sensing device or the carrying device to align the dummy lens with the sensing device according to the first sensing result. The second adjustment device mounts a projector disposed adjacent to a light entrance portion of the optical waveguide lens. The second adjustment device adjusts the position of the projector to align the optical waveguide lens with the projector.