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Related Concept Videos

Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...
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High-speed Particle Image Velocimetry Near Surfaces
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Published on: June 24, 2013

Miniature, solid state photon correlation laser Doppler velocimetry.

R G Brown, J G Burnett, J Mansbridge

    Applied Optics
    |June 23, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new miniature solid-state laser Doppler velocimeter (LDV) was developed for measuring gas, liquid, and solid surface velocities. This device utilizes photon correlation techniques and has been validated against standard LDV equipment.

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    Last Updated: Jun 12, 2026

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    Area of Science:

    • Physics
    • Engineering
    • Optical Measurement

    Background:

    • Laser Doppler Velocimetry (LDV) is a widely used technique for non-contact velocity measurement.
    • Existing LDV systems can be bulky and complex, limiting their application in certain scenarios.
    • Advancements in solid-state laser technology offer potential for miniaturization.

    Purpose of the Study:

    • To design, construct, and test a novel miniature, solid-state laser Doppler velocimeter (LDV).
    • To evaluate the performance of the miniature LDV for measuring velocities of gases, liquids, and solid surfaces.
    • To investigate the utility of photon correlation techniques in conjunction with the miniature LDV.

    Main Methods:

    • Development of a compact, solid-state laser Doppler velocimeter system.
    • Implementation of photon correlation techniques for enhanced signal processing.
    • Conducting comparative tests against established, standard LDV equipment.

    Main Results:

    • Successful design and construction of a functional miniature solid-state LDV.
    • Demonstration of the system's capability to measure velocities across different media (gases, liquids, solids).
    • Validation of performance through detailed comparisons with standard LDV systems.

    Conclusions:

    • The developed miniature solid-state LDV is a viable and effective tool for velocity measurements.
    • Photon correlation techniques enhance the performance of the miniature LDV.
    • This compact system offers a promising alternative for applications requiring portable or space-constrained velocity measurement solutions.