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Parallel Imaging of 3D Surface Profile with Space-Division Multiplexing.

Hyung Seok Lee¹, Soon-Woo Cho², Gyeong Hun Kim³

¹Department of Cogno-Mechatronics Engineering, Pusan National University, Busan 609-735, Korea. leehsx@pusan.ac.kr.

Sensors (Basel, Switzerland)

|January 26, 2016

Summary

This study introduces a novel optical frequency domain imaging system for rapid, parallel 3D surface profiling. The method efficiently captures detailed surface topography from two distinct areas simultaneously using one camera.

Keywords:

interferometry laser and laser optics optical frequency domain imaging swept source three-dimensional imaging

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Area of Science:

Optical Imaging
Metrology
Surface Profilometry

Background:

Accurate 3D surface profiling is crucial for various scientific and industrial applications.
Existing optical frequency domain imaging (OFDI) systems often face limitations in speed and parallel data acquisition.

Purpose of the Study:

To develop and demonstrate a modified OFDI system capable of parallel 3D surface imaging.
To achieve simultaneous acquisition of surface topography from multiple distinct areas.

Main Methods:

Implementation of a modified OFDI system utilizing space division multiplexing (SDM).
Employment of dual-area swept sourced beams for parallel data capture.
Single camera integration for simultaneous 3D surface information retrieval.

Main Results:

Demonstrated successful parallel imaging of two distinct 3D surface areas concurrently.
Achieved double fields of view (FOVs) of 11.16 mm × 5.92 mm within 0.5 seconds.
Obtained a height range of 460 µm with axial and transverse resolutions of 3.6 µm and 5.52 µm, respectively.

Conclusions:

The developed OFDI system with SDM enables efficient, high-resolution, parallel 3D surface profiling.
This method offers a significant advancement for applications requiring rapid and simultaneous surface measurements of multiple areas.