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Determining Surface Shape of Translucent Objects with the Combination of Laser-Beam-Based Structured Light and
Bingquan Chen1, Peng Shi1, Yanhua Wang1
1Research Center for Quantum Optics and Quantum Communication, School of Science, Qingdao University of Technology, Qingdao 266525, China.
Sensors (Basel, Switzerland)
|October 13, 2021
Summary
This study presents a novel method for 3D surface measurement of translucent objects using structured light and polarization. The technique accurately reconstructs shapes even with background illumination, overcoming a key challenge in optical metrology.
Area of Science:
- Optical Metrology
- 3D Reconstruction
- Surface Measurement
Background:
- Accurate 3D surface measurement of translucent objects is challenging due to light scattering and background illumination.
- Existing methods often struggle with complex optical properties of translucent materials.
Purpose of the Study:
- To develop and validate a robust method for 3D surface measurement and reconstruction of translucent objects.
- To address the limitations of current techniques in handling scattering and background light.
Main Methods:
- Combined structured light projection (sinusoidal laser beams) with polarization techniques.
- Utilized theoretical analysis of light formation, propagation, reflection, and transmission.
- Employed a polarizer and optical filter for signal separation and noise reduction.
Main Results:
- Achieved accurate 3D reconstructions using a one-shot measurement approach.
- Successfully removed noise from multiply-scattered photons and background illuminance.
- Demonstrated reliable performance even in the presence of background illumination.
Conclusions:
- The proposed method effectively measures and reconstructs 3D surfaces of translucent objects.
- The integration of structured light and polarization offers a significant advancement in optical metrology.
- The technique provides accurate results in challenging lighting conditions.
