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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

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Published on: July 5, 2016

Image processing for phase imperfections in electron holography.

Wei Li¹, Jianhui Zhang, Takayoshi Tanji

¹Graduate School of Engineering Nagoya University, Nagoya 464-8603, Japan.

Microscopy (Oxford, England)

|June 12, 2013

Summary

Electron holography phase images can show contrast reversals. This study introduces a method using mathematical morphology to correct fringe disconnections, improving phase information accuracy.

Keywords:

electron holography interference fringes phase information

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Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

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Published on: February 8, 2014

Area of Science:

Physics
Materials Science
Microscopy

Background:

Digital reconstruction in electron holography can lead to inaccurate phase information due to abrupt contrast reversals.
These reversals stem from phase jumps or fringe disconnections caused by weak electron-wave amplitude.

Purpose of the Study:

To address the issue of inaccurate phase information in electron holography.
To develop a robust method for identifying and correcting interference fringe disconnections.

Main Methods:

A novel searching technique based on mathematical morphology was employed.
This technique identifies disconnection points in interference fringes.

Main Results:

The proposed method successfully located points of fringe disconnection.
Correction of these fringes led to the reconstruction of more accurate phase information.

Conclusions:

The developed technique effectively corrects interference fringe disconnections in electron holography.
This improves the reliability and accuracy of digitally reconstructed phase images.