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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...
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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,...
IR Spectrometers01:25

IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...

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Related Experiment Video

Updated: Jun 8, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)
12:22

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)

Published on: August 4, 2018

Photo-compact-disk-based optical correlator.

S Jutamulia, D A Gregory

    Applied Optics
    |September 22, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new joint-transform correlator utilizes an inexpensive photo-compact-disk player. This optical-disk-based correlator demonstrates realistic implementation using readily available technology.

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    Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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    Direct Imaging of Laser-driven Ultrafast Molecular Rotation

    Published on: February 4, 2017

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    Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)
    12:22

    Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)

    Published on: August 4, 2018

    Direct Imaging of Laser-driven Ultrafast Molecular Rotation
    10:52

    Direct Imaging of Laser-driven Ultrafast Molecular Rotation

    Published on: February 4, 2017

    Area of Science:

    • Optics
    • Optical Engineering
    • Signal Processing

    Background:

    • Joint-transform correlators (JTCs) are essential for pattern recognition.
    • Implementing JTCs often requires specialized and costly optical components.

    Purpose of the Study:

    • To describe a novel joint-transform correlator.
    • To demonstrate the feasibility of using inexpensive, commercially available technology for optical correlation.

    Main Methods:

    • The study details the construction of a JTC.
    • A key component is an inexpensive photo-compact-disk player repurposed for optical correlation.

    Main Results:

    • The developed system functions as a joint-transform correlator.
    • The use of a photo-compact-disk player proves effective in an optical-disk-based correlator.

    Conclusions:

    • An inexpensive and realistic optical-disk-based joint-transform correlator can be built.
    • This approach leverages current technology for practical optical correlation applications.