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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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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 Microscopy01:16

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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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Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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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...
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Related Experiment Video

Updated: Jul 9, 2025

Biomolecular Imaging of Cellular Uptake of Nanoparticles using Multimodal Nonlinear Optical Microscopy
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MEMS-based portable confocal Raman spectroscopy rapid imaging system.

Guozhuo Zhang, Xu Wang, Dezhi Zheng

    Applied Optics
    |December 1, 2023
    PubMed
    Summary

    This study introduces a MEMS-based method for miniaturized, rapid confocal Raman spectroscopy imaging. The novel approach significantly enhances imaging speed, enabling faster material analysis for field applications.

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    Area of Science:

    • Spectroscopy
    • Microelectromechanical Systems (MEMS)

    Background:

    • Portable confocal Raman spectroscopy requires miniaturization and rapid imaging capabilities.
    • Traditional point-scan methods are slow and bulky, limiting field applications.

    Purpose of the Study:

    • To develop a miniaturized and rapid imaging method for portable confocal Raman spectroscopy.
    • To combine MEMS mirror scanning with grid-by-grid scanning for enhanced performance.

    Main Methods:

    • Utilized a dual 2D MEMS mirror scanning technique for system miniaturization.
    • Implemented a grid-by-grid scanning method for rapid Raman spectroscopy imaging.
    • Constructed a portable system with an optical probe size of 98mm x 70mm x 40mm.

    Main Results:

    • Achieved an imaging speed 45 times faster than traditional point-scan systems.
    • Demonstrated rapid identification of agate ore, obtaining a 126µm² x 126µm² composition map in 16 minutes.
    • Confirmed potential for further speed improvements.

    Conclusions:

    • The proposed method offers a novel solution for miniaturized and rapid confocal Raman spectroscopy.
    • This technology provides a new means for rapid field detection in areas like geology and space exploration.