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Related Concept Videos

Continuous -time Fourier Transform01:11

Continuous -time Fourier Transform

The Fourier series is instrumental in representing periodic functions, offering a powerful method to decompose such functions into a sum of sinusoids. This technique, however, necessitates modification when applied to nonperiodic functions. Consider a pulse-train waveform consisting of a series of rectangular pulses. When these pulses have a finite period, they can be accurately represented by a Fourier series. Yet, as the period approaches infinity, resulting in a single, isolated pulse, the...
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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...
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Imaging Biological Samples with Optical Microscopy

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Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

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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,...
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Focusing of Light in the Eye

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

Published on: August 4, 2018

Coherent transient continuous optical processor.

W R Babbitt, J A Bell

    Applied Optics
    |September 24, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates a novel optical signal processor that permanently stores spectral patterns in solids. This allows for rapid data processing and real-time continuous operation with high bandwidth and storage density.

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    Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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    Published on: May 30, 2014

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    Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)
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    Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
    09:23

    Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

    Published on: May 30, 2014

    Area of Science:

    • Photonics
    • Optical Computing
    • Solid-State Physics

    Background:

    • Inhomogeneously broadened solids exhibit complex absorption profiles.
    • Temporal modulation of optical pulses is key to manipulating spectral populations.

    Purpose of the Study:

    • To develop a method for permanently programming spectral population distributions in solids.
    • To enable fast, real-time optical signal processing using stored patterns.

    Main Methods:

    • Programming absorption profiles using two temporally modulated pulses.
    • Gating the spectral population to permanently fix the distribution.
    • Illuminating the solid with an uninterrupted, temporally modulated optical beam to generate a signal.

    Main Results:

    • A coherent transient output signal is generated, correlating with the stored pattern.
    • Multiple patterns can be stored and accessed randomly at different locations.
    • High performance is predicted: >5 GHz bandwidth, >10^4 time-bandwidth product, >10^5 patterns/cm^2 storage density.

    Conclusions:

    • The developed optical signal processor enables permanent pattern storage and random access.
    • Real-time continuous processing with high performance metrics is achievable.
    • This technology offers a pathway for advanced optical data processing.