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Related Experiment Video

Updated: Jun 16, 2026

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

Published on: June 12, 2015

Interferometry with schlieren microscopy.

|February 20, 2010

Summary

This summary is machine-generated.

Schlieren systems can act as interferometers for small objects when the stop size matches the Airy disk. This theoretical demonstration shows how interferograms are produced under these specific conditions.

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Area of Science:

Optics
Optical Engineering
Interferometry

Background:

Schlieren systems are typically used for visualizing optical disturbances.
The behavior of schlieren systems with varying stop apertures is not fully characterized, especially concerning interferometric properties.

Purpose of the Study:

To theoretically demonstrate that a schlieren system can function as an interferometer.
To identify the specific condition under which this interferometric behavior occurs.

Main Methods:

Theoretical analysis of light propagation and diffraction in a schlieren system.
Comparison of the stop size to the Airy disk characteristics at the stop plane.

Main Results:

A schlieren system functions as an interferometer when the stop diameter is less than or equal to the central maximum of the Airy disk.
This condition enables the visualization of interference patterns (interferograms) for sub-wavelength objects.

Conclusions:

The theoretical framework confirms the potential for schlieren systems to operate as interferometers.
This finding opens new avenues for high-resolution optical measurements using modified schlieren setups.