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Related Concept Videos

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 6, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
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Published on: January 3, 2016

Laser ranging and mapping with a photon-counting detector.

W C Priedhorsky, R C Smith, C Ho

    Applied Optics
    |November 12, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Photon-counting laser mapping uses advanced detectors for high-resolution 3D imaging. This novel remote sensing technique offers centimeter-level detail, enabling surface texture discrimination.

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    Laser-Induced Fluorescence Emission (L.I.F.E.) as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats

    Published on: October 26, 2019

    Area of Science:

    • Photonics and Remote Sensing
    • Advanced Detector Technology
    • 3D Imaging Systems

    Background:

    • Traditional remote sensing methods face limitations in achieving high-resolution 3D mapping.
    • Distinguishing objects with similar reflectivity (albedo) in 3D space remains a challenge.
    • Subnanosecond timing resolution is crucial for precise range measurements in laser mapping.

    Purpose of the Study:

    • To introduce a novel photon-counting laser mapping technique for enhanced remote sensing.
    • To demonstrate the capability of MicroChannel plate detectors with crossed delay-line (MCP/CDL) readout for high-accuracy 3D mapping.
    • To achieve intrinsic 3D imaging without multiple viewing angles, improving object discrimination.

    Main Methods:

    • Utilizing MicroChannel plate detectors with crossed delay-line (MCP/CDL) readout for high position accuracy and subnanosecond photon timing.
    • Integrating MCP/CDL detectors with a fast-pulse, high-repetition-rate laser illuminator to create a mapping system.
    • Analyzing signal-to-noise ratios as a function of laser flux and background light levels.

    Main Results:

    • The proposed system achieves exceptional in-range and cross-range resolution for mapping solid targets.
    • Intrinsic 3D images are generated, allowing discrimination of objects based on shape and texture, not just albedo.
    • A few centimeters in-range resolution is attainable with detector time resolution and pulse width around 10(-10) s.
    • Simulated images demonstrate the system's potential for detailed surface texture discrimination.

    Conclusions:

    • Photon-counting laser mapping with MCP/CDL detectors represents a significant advancement in remote sensing technology.
    • The technique enables high-resolution, intrinsically 3D mapping from various platforms (ground, airborne, space) under diverse lighting conditions.
    • This method offers superior object discrimination capabilities, particularly for surfaces with similar albedo but different textures.