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Fiber optic projection-imaging system for shape measurement in confined space
Lujie Chen1, Viswanath Bavigadda1, Theodoros Kofidis2
1Engineering Product Design, Singapore University of Technology and Design, Singapore 138682.
Thescientificworldjournal
|April 2, 2014
Summary
This study introduces a flexible fiber-based imaging system for shape measurement in confined spaces. While accurate with good alignment, it faces distortions and noise, requiring method modifications for broader use.
Area of Science:
- Optical Engineering
- Metrology
- Imaging Systems
Background:
- Conventional shape measurement systems struggle in confined or complex environments.
- Flexible imaging solutions are needed for specialized metrology applications.
Purpose of the Study:
- To propose and evaluate a fiber-based projection-imaging system for shape measurement.
- To assess the system's performance in various challenging environments.
- To identify limitations and suggest improvements for practical application.
Main Methods:
- Development of a fiber-based projection-imaging system.
- Experimental validation in open space, closed space, and underwater conditions.
- Analysis of accuracy, geometrical distortion, and noise introduced by imaging fibers.
Main Results:
- Achieved less than 2% error in height measurement with proper alignment.
- Observed significant geometrical distortion (e.g., curvature on flat surfaces) when alignment is difficult.
- Identified fine-scale noise from fibers requiring suppression via smoothing filters.
Conclusions:
- Fiber-based systems offer unique advantages for shape measurement in confined spaces.
- Existing calibration and fringe pattern processing methods need adaptation for fiber-based systems.
- Further development is required to overcome limitations for wider applicability.
