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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

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...
Super-resolution Fluorescence Microscopy01:37

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 Microscopy Techniques01:22

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...
Confocal Fluorescence Microscopy01:16

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,...
Two-Dimensional Microscopy in Microbiology01:29

Two-Dimensional Microscopy in Microbiology

Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

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Related Experiment Video

Updated: Jun 19, 2026

Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope
14:09

Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope

Published on: April 7, 2014

Optical microscopy in photosynthesis.

Richard Cisek1, Leigh Spencer, Nicole Prent

  • 1Department of Chemical and Physical Sciences, University of Toronto, 3359 Mississauga Road, Mississauga, ON, L5L 1C6, Canada.

Photosynthesis Research
|October 24, 2009
PubMed
Summary
This summary is machine-generated.

Nonlinear microscopy offers advanced imaging for photosynthetic organisms, overcoming limitations of linear techniques. This review highlights its potential for studying diverse biological samples, from plant complexes to algae and cyanobacteria.

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Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses

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Area of Science:

  • Optical Microscopy
  • Biophysics
  • Plant Science

Background:

  • Optical microscopy is crucial for biological studies.
  • Linear microscopy has limitations in deep tissue and live sample imaging.
  • Nonlinear microscopy offers enhanced contrast and optical sectioning.

Purpose of the Study:

  • To review emerging and established optical microscopy techniques.
  • To present nonlinear contrast generation methods.
  • To focus on the potential of nonlinear microscopy for studying photosynthetic organisms.

Main Methods:

  • Review of linear and nonlinear optical microscopy techniques.
  • Focus on harmonic generation and multiphoton excitation fluorescence.
  • Application examples on various photosynthetic samples.

Main Results:

  • Nonlinear microscopy provides advantages like deep tissue imaging and optical sectioning.
  • Demonstrated imaging of plant antenna complexes, starch granules, chloroplasts, algae, and cyanobacteria.
  • Highlighted the potential of nonlinear techniques beyond multiphoton fluorescence.

Conclusions:

  • Nonlinear microscopy shows significant promise for studying photosynthetic organisms.
  • Despite being nascent, nonlinear techniques offer superior capabilities over linear methods.
  • Further development and application of nonlinear microscopy are encouraged for biological research.