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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...
Leveling Equipment01:18

Leveling Equipment

As leveling involves measuring vertical distances relative to a horizontal line of sight, it requires a graduated rod, called a level rod, for vertical measurements and an instrument called a level for a horizontal sight line. A level includes a high-powered telescope with a mechanism for leveling to ensure the line of sight is horizontal when the bubble in the spirit level is centered. Leveling rods, made of wood, metal, or fiberglass, are graduated in feet or meters and commonly used in two-...
Light Acquisition02:16

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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,...
Distance Measurements by Taping01:18

Distance Measurements by Taping

Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
Lines in Space01:29

Lines in Space

In three-dimensional analytic geometry, a line can be fully described using vector equations when both a point on the line and its direction are known. This approach has practical applications in fields such as engineering and surveying, where precise spatial modeling is essential. For instance, a laser beam from a surveying instrument directed across a construction site can be modeled mathematically as a line using vectors.Let the laser beam originate from a known point P₀, represented by the...

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Related Experiment Video

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A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties
08:41

A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties

Published on: January 7, 2017

Lidar.

R T Collis

    Applied Optics
    |January 23, 2010
    PubMed
    Summary

    Light Detection and Ranging (Lidar) provides valuable atmospheric insights by analyzing backscattered laser energy. This technology aids meteorology and atmospheric research by mapping clouds and atmospheric structures, despite signal attenuation challenges.

    Area of Science:

    • Atmospheric Science
    • Remote Sensing
    • Optical Physics

    Background:

    • Lidar (Light Detection and Ranging) utilizes laser pulses to probe atmospheric properties.
    • Atmospheric backscattering measurements are fundamental for understanding atmospheric composition and dynamics.
    • Signal attenuation complicates direct interpretation but qualitative data remains valuable.

    Purpose of the Study:

    • To review the principles and applications of Lidar in atmospheric observation.
    • To highlight the value of Lidar in operational meteorology and atmospheric research.
    • To discuss advanced Lidar techniques and future potential.

    Main Methods:

    • Utilizing laser energy transmitted in a radar-like manner.
    • Measuring atmospheric backscattering intensity as a function of range.

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  • Analyzing signal attenuation to infer atmospheric optical properties.

    • Main Results:

    • Qualitative delineation of clouds and atmospheric structures is achievable.
    • Atmospheric optical parameters can be evaluated under specific conditions.
    • Lidar data correlates with meteorologically significant characteristics.

    Conclusions:

    • Lidar is a powerful tool for atmospheric research and operational meteorology.
    • Advanced techniques like resonant absorption and Raman scattering enhance Lidar capabilities.
    • Continued development promises expanded applications and improved atmospheric monitoring.