Laser Projector Alignment via Beam Steering and Optical Feedback
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Solution Overview
Problem
Existing light projection systems face challenges in aligning the projector with the environment to accurately position and orient the projected template.
Innovation Solution
The system includes a light projector with a beam-steering system and an optical detector, along with processors that execute methods for automatic or semi-automatic alignment with the environment, checking for drift, and realigning the projector as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual alignment methods are used, then device complexity is reduced, but alignment precision and positioning accuracy deteriorate
Solution Approach 1:
The system performs automatic alignment without requiring manual intervention. The processor automatically controls the beam-steering system to position the laser beam on detected feature points, and the optical detector automatically detects reflected light to verify alignment, enabling the system to align itself
Solution Approach 2:
The optical detector provides feedback signals about the position of reflected light to the processor. The processor uses this feedback to adjust the beam-steering system until accurate alignment is achieved, creating a closed-loop control system that continuously monitors and corrects alignment
2Adaptability or versatility
If the projector is moved or rotated, then adaptability to different positions is improved, but alignment precision deteriorates
Solution Approach 1:
The system transitions from static alignment to dynamic alignment capability. The beam-steering system can be actively adjusted after movement or rotation occurs, allowing the projector to adapt to new positions while maintaining alignment precision through real-time correction
Solution Approach 2:
The system performs alignment operations before projection begins. By first detecting feature points and establishing accurate alignment through the optical detector and beam-steering system, the system prepares the projection path in advance to ensure precision even when the projector is in different positions
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 solution enables precise alignment and realignment of the light projector, ensuring accurate projection of templates and topographical lines on surfaces, even when the projector is moved or rotated.
Implementation Method 1
an optical detector configured to receive at least a portion of a light beam reflected off of the surface
Data Source
Figure 1A~1C
Figure 1D
Figure 2A
AI summary
A light projector and method of aligning the light projector is provided. A light projector steers an outgoing beam of light onto an object, passing light returned from the object through a focusing lens onto an optical detector. The light projector may generate a light pattern or template by rapidly moving the outgoing beam of light along a path on a surface. To place the light pattern/template in a desired location, the light projector may be aligned with an electronic model.