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Imaging Biological Samples with Optical Microscopy

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...

Overview of Microscopy Techniques

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The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...

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Updated: Sep 13, 2025

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Lensless magneto-optical imaging.

V Neu¹, G Pedrini², I Soldatov³

¹Leibniz Institute for Solid State and Materials Research Dresden, 01099, Dresden, Germany. v.neu@ifw-dresden.de.

Scientific Reports

|August 2, 2025

Summary

This summary is machine-generated.

Lensless microscopy combined with magneto-optical effects provides new ways to image magnetic materials. This technique captures both intensity and phase information, offering enhanced domain imaging capabilities beyond conventional methods.

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Area of Science:

Optics and Photonics
Materials Science
Magnetism

Background:

Magneto-optical methods like the Faraday and Kerr effects are crucial for studying magnetic microstructures.
Conventional lens-based microscopy has limitations in field-of-view to magnification ratio.
Lensless imaging techniques offer alternatives with potential for improved performance and additional information channels.

Purpose of the Study:

To verify the efficacy of a lensless multiplane recording scheme for magneto-optical imaging.
To demonstrate the retrieval of both intensity and phase information from magnetic samples using lensless microscopy.
To explore the potential of lensless techniques for advancing the study of magnetic materials.

Main Methods:

Utilized a lensless multiplane recording scheme to capture light interacting with magnetic samples.
Employed magneto-optical effects (Faraday and Kerr effects) for sample magnetization studies.
Reconstructed magneto-optical intensity and phase information from the recorded data.

Main Results:

Reconstructed magneto-optical intensity showed qualitative agreement with conventional lens-based Faraday microscopy.
The retrieved phase information provided direct access to magnetic domain information.
Domain imaging was achieved even without an analyzer or in a crossed analyzer position, leveraging the phase data.

Conclusions:

Lensless multiplane recording is a viable technique for magneto-optical investigations of magnetic materials.
The ability to access phase information offers a significant advantage over conventional methods.
This approach paves the way for leveraging lensless microscopy's benefits in magneto-optical research.