Image Module Adjustment Assembly for AR Optical Alignment
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Solution Overview
Problem
Augmented reality glasses often cause visual discomfort and dizziness due to misalignment of images projected by the image module, leading to poor superimposition effects and eye discomfort.
Innovation Solution
An optical apparatus with an adjustment assembly that includes an adjustment sheet, elastic member, and adjustment screw, allowing for precise adjustment of the image module's position relative to the bracket and waveguide sheet, ensuring alignment and consistency of images projected to both eyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the image module is fixed on the bracket without adjustment mechanism, then the device complexity is reduced, but the image alignment precision deteriorates causing visual discomfort and poor superimposition effect
Solution Approach 1:
The patent introduces an adjustment mechanism that allows the image module to be dynamically positioned relative to the bracket. The adjustment assembly includes components that enable fine-tuning of the image module's position to achieve precise alignment, transforming a static fixed configuration into a dynamic adjustable system.
Solution Approach 2:
The adjustment mechanism enables changing positional parameters of the image module along the optical axis and laterally. By allowing modification of these parameters, the system can compensate for manufacturing tolerances and achieve optimal image alignment, directly addressing the precision requirement.
2Manufacturing precision
If the image module position is adjusted to improve alignment, then the superimposition effect improves, but the ease of operation deteriorates due to complex adjustment procedures
Solution Approach 1:
The adjustment mechanism is designed to be self-adjusting through elastic member engagement. The elastic member automatically pushes the adjustment sheet against the bracket when the adjustment screw is tightened, enabling the system to self-align without requiring complex manual procedures or additional tools.
Solution Approach 2:
The adjustment sheet acts as an intermediary component between the image module and the bracket. It translates the rotational motion of the adjustment screw into linear displacement of the image module, providing a simple and intuitive adjustment mechanism that improves ease of operation.
3Manufacturing precision
If multiple locking holes and adjustment holes are provided for precise positioning, then the manufacturing precision improves, but the device complexity increases
Solution Approach 1:
The adjustment mechanism is segmented into distinct functional components: locking holes for positional constraint, adjustment holes for fine-tuning, elastic members for applying force, and adjustment screws for controlling the adjustment sheet. This segmentation allows each component to perform its specific function efficiently while maintaining overall system simplicity.
Data Source
AI summary
An optical apparatus includes a bracket, an image module, and an adjustment assembly. The bracket includes a bracket entrance pupil opening and a locking hole adjacent to the bracket entrance pupil opening. The image module is disposed on the bracket, the image module includes an exit pupil area, and the exit pupil area faces the bracket entrance pupil opening. The adjustment assembly includes an adjustment sheet, an elastic member, and an adjustment screw. The adjustment sheet is fastened on a side of the image module facing the bracket and includes an adjustment hole corresponding to the locking hole. The elastic member is disposed on the bracket and is disposed around the bracket entrance pupil opening. The adjustment screw passes through the adjustment hole of the adjustment sheet and is screwed into the locking hole to enable the adjustment sheet to abut against the elastic member.