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Three-dimensional ranging system based on Fresnel incoherent correlation holography
Optics Letters
|June 14, 2024
Summary
We developed a 3D ranging system using Fresnel incoherent correlation holography (FINCH) and 2D digital image correlation (2D-DIC). This method enables precise 3D measurements with incoherent light, improving accuracy over traditional techniques.
Area of Science:
- Optics and Photonics
- Metrology
- Holography
Background:
- Coherent digital holography (DH) is typically used for displacement measurements.
- Incoherent illumination offers advantages in certain imaging scenarios but is less common for precise ranging.
- Accurate three-dimensional (3D) measurement systems are crucial for various scientific and industrial applications.
Purpose of the Study:
- To propose and demonstrate a novel 3D ranging system.
- To utilize Fresnel incoherent correlation holography (FINCH) for simultaneous 3D range measurement.
- To overcome limitations of coherent methods by employing incoherent illumination.
Main Methods:
- Implementing a 3D ranging system based on Fresnel incoherent correlation holography (FINCH).
- Combining holographic reconstruction for observation range determination.
- Employing two-dimensional digital imaging correlation (2D-DIC) for in-plane range determination.
- Utilizing incoherent illumination for the measurement process.
Main Results:
- Successful demonstration of a 3D ranging system using FINCH and 2D-DIC.
- Precise 3D ranging determination achieved with incoherent illumination.
- Improved measurement accuracy demonstrated on a resolution target.
Conclusions:
- The proposed FINCH-based system effectively achieves simultaneous 3D range measurement using incoherent light.
- The integration of holographic reconstruction and 2D-DIC enhances measurement accuracy and precision.
- This approach offers a viable alternative to coherent methods for 3D ranging applications.
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