Quantitative measurement of a phase object by fringe scanning interference microscopy

Area of Science:

• Optical microscopy
• Interferometry
• Phase contrast imaging

Background:

• Quantitative phase imaging is crucial for characterizing transparent specimens.
• Traditional microscopy often lacks the ability to measure phase shifts accurately.
• Interference microscopy offers a pathway to visualize phase variations.

Purpose of the Study:

• To describe a simple interference microscope.
• To demonstrate its capability for quantitative phase measurement.
• To present the underlying theory and experimental validation.

Main Methods:

• Development of a basic interference microscope.
• Implementation of a fringe scanning technique for data acquisition.
• Theoretical analysis of the optical path differences.

Main Results:

• The interference microscope successfully acquired quantitative phase data.
• Experimental results validated the theoretical predictions.
• The system demonstrated effective phase object characterization.

Conclusions:

• A simple fringe-scanning interference microscope is a viable tool for quantitative phase imaging.
• This technique provides a practical method for analyzing phase objects.
• The presented approach is robust and experimentally verified.