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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...

Confocal Fluorescence Microscopy

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

Super-resolution Fluorescence Microscopy

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.

Overview of Electron Microscopy

Overview of Electron Microscopy

The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.

Overview of Microscopy Techniques

Overview of Microscopy Techniques

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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Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...

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Related Experiment Video

Updated: Jun 23, 2026

Setting Up a Simple Light Sheet Microscope for In Toto Imaging of C. elegans Development

Setting Up a Simple Light Sheet Microscope for In Toto Imaging of C. elegans Development

Published on: May 5, 2014

A practical guide to light-sheet microscopy for nanoscale imaging: Looking beyond the cell.

Stephanie N Kramer¹, Jeanpun Antarasen¹, Cole R Reinholt¹

¹Department of Physics, Case Western Reserve University, Rockefeller Building, 2076 Adelbert Road, Cleveland, Ohio 44106, USA.

Journal of Applied Physics

|September 9, 2024

Summary

This guide simplifies light-sheet microscopy (LSM) implementation for scientists. It covers fundamental concepts, system construction, and data analysis for imaging microscale and nanoscale features and diffusion dynamics.

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Setting Up a Simple Light Sheet Microscope for In Toto Imaging of C. elegans Development

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Published on: January 26, 2024

Area of Science:

Biophysics
Optical Microscopy
Scientific Instrumentation

Background:

Light-sheet microscopy (LSM) offers advantages for imaging dynamic biological processes.
Implementing LSM, especially custom-built systems, presents significant practical challenges for researchers.
A need exists for a clear, accessible guide to LSM principles and construction.

Purpose of the Study:

To provide a comprehensive guide for the practical implementation of light-sheet microscopy.
To assist scientists in designing, constructing, and utilizing LSM systems.
To serve as a valuable resource for researchers new to light-sheet microscopy.

Main Methods:

Detailed explanation of fundamental microscopy concepts relevant to LSM.
Discussion of beam profile considerations and image reconstruction techniques.
Guidance on constructing a home-built LSM system, including alignment and calibration.

Main Results:

Outlines practical decisions for building a custom light-sheet microscope.
Provides insights into critical alignment and calibration procedures.
Introduces home-built code for efficient data analysis.

Conclusions:

This guide demystifies the complexities of light-sheet microscopy implementation.
It empowers scientists to overcome challenges in building and operating LSM systems.
Facilitates the application of LSM for imaging static and dynamic micro/nanoscale phenomena.