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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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Related Experiment Video

Updated: Jun 10, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Programmable coherent source arrays generated by spatial light modulators.

S F Habiby, A Marrakchi, J R Wullert

    Applied Optics
    |August 21, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Researchers created programmable coherent light sources using liquid-crystal displays and Fresnel lenses. This technology enables flexible control over light arrays for various applications.

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    Last Updated: Jun 10, 2026

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

    Published on: September 5, 2019

    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Coherent light source arrays are crucial for applications like optical computing and imaging.
    • Existing methods for generating programmable light arrays often face limitations in flexibility and resolution.

    Purpose of the Study:

    • To develop a novel method for generating programmable coherent source arrays.
    • To explore the use of addressable liquid-crystal spatial light modulators and Fresnel lenses for light manipulation.

    Main Methods:

    • Utilized addressable liquid-crystal spatial light modulators (SLMs) in conjunction with two-dimensional Fresnel lens arrays.
    • Investigated various SLM configurations, including liquid-crystal light valves, pixelated displays, and custom-patterned electrode devices.
    • Employed binary-amplitude and binary-phase Fresnel lenses for precise control over light wavefronts.

    Main Results:

    • Successfully generated programmable coherent source arrays with demonstrated control over light beam formation.
    • Characterized the performance of different SLM-based devices, identifying their programmable features and resolution capabilities.
    • Highlighted the potential for high-density, reconfigurable optical beam steering and shaping.

    Conclusions:

    • Addressable liquid-crystal spatial light modulators combined with Fresnel lenses offer a versatile platform for creating programmable coherent light source arrays.
    • The described devices provide a pathway to advanced optical systems with tunable functionalities.
    • Further research can explore optimization for enhanced resolution and expanded application domains.