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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...
Three-Dimensional Microscopy in Microbiology01:28

Three-Dimensional Microscopy in Microbiology

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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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...
IR Spectroscopy: Molecular Vibration Overview01:24

IR Spectroscopy: Molecular Vibration Overview

When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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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,...

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Related Experiment Video

Updated: May 15, 2026

Implementation of a Coherent Anti-Stokes Raman Scattering (CARS) System on a Ti:Sapphire and OPO Laser Based Standard Laser Scanning Microscope
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Published on: July 17, 2016

Biomolecular imaging with coherent nonlinear vibrational microscopy.

Chao-Yu Chung1, Eric O Potma

  • 1Department of Chemistry, University of California, Irvine, California 92697, USA.

Annual Review of Physical Chemistry
|December 19, 2012
PubMed
Summary

Nonlinear vibrational microscopy, including sum-frequency generation (SFG) and coherent Raman scattering (CRS), offers label-free, high-speed imaging for detailed biomolecular analysis in cells and tissues.

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Implementation of a Coherent Anti-Stokes Raman Scattering (CARS) System on a Ti:Sapphire and OPO Laser Based Standard Laser Scanning Microscope
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Area of Science:

  • Biomedical Optics
  • Spectroscopy
  • Microscopy

Background:

  • Label-free optical imaging utilizes spectroscopic vibrational contrast for biomolecular analysis.
  • Both linear and nonlinear vibrational microscopy rely on molecular transitions for contrast.
  • Nonlinear methods offer enhanced imaging speeds and spatial resolution compared to linear techniques.

Purpose of the Study:

  • To review the molecular contrast mechanisms of SFG and CRS microscopy.
  • To highlight advanced imaging capabilities of nonlinear vibrational microscopy.
  • To discuss the impact of these techniques on biological and biomedical research.

Main Methods:

  • Discussion of second-order sum-frequency generation (SFG) microscopy.
  • Discussion of third-order coherent Raman scattering (CRS) microscopy.
  • Comparison of nonlinear and linear vibrational microscopy techniques.

Main Results:

  • Nonlinear vibrational microscopy provides unprecedented imaging speeds.
  • Nonlinear techniques offer strategies for higher spatial resolution.
  • Access to additional molecular parameters enhances sample interrogation.

Conclusions:

  • Nonlinear vibrational microscopy is a premier tool for chemically dissecting live cells and tissues.
  • SFG and CRS microscopy provide rich chemical and structural information.
  • Advanced imaging capabilities have significantly impacted biological and biomedical research.