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Focal plane coincidence method for a multi-view telecentric 3D imaging system.

Dezhao Wang, Weihu Zhou, Zili Zhang

|February 15, 2024

Summary

This study introduces a novel sharpness evaluation method for multi-view microscopic fringe projection systems. The technique precisely aligns focal planes, significantly improving 3D reconstruction consistency.

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Area of Science:

Optical Metrology
Microscopy
3D Reconstruction

Background:

Multi-view microscopic fringe projection systems utilize telecentric lenses and the Scheimpflug condition.
Accurate focal plane coincidence is critical for consistent 3D measurements but remains a challenge.

Purpose of the Study:

To develop a method for precisely coinciding focal planes in multi-view microscopic systems.
To enhance the consistency and accuracy of 3D reconstruction.

Main Methods:

A sharpness evaluation function based on the total power of the line-spread function was developed.
A full-field sharpness distribution map was generated using this function.
The correlation between the sharpness map and focal plane orientation was used for precise alignment.

Main Results:

The proposed method effectively aligns focal planes across multiple views.
Experimental validation confirmed improved consistency in 3D reconstruction.
The technique addresses the challenge of inconsistent measurements between views.

Conclusions:

The developed sharpness evaluation method offers a robust solution for focal plane coincidence.
This advancement leads to more reliable and accurate 3D reconstructions in microscopic imaging.
The findings are significant for applications requiring high-precision 3D measurements.