شارك تعلم استمتع حيث العلم والفائده


    application of laser

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    عمرو الشعراوى
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    عدد الرسائل : 8
    العمر : 30
    تاريخ التسجيل : 31/03/2008

    application of laser

    مُساهمة من طرف عمرو الشعراوى في 2/4/2008, 1:12 am

    LIDAR (Light Detection and Ranging) is an optical remote sensing technology that measures properties of scattered light to find range and/or other information of a distant target. The prevalent method to determine distance to an object or surface is to use laser pulses. Like the similar radar technology, which uses radio waves instead of light, the range to an object is determined by measuring the time delay between transmission of a pulse and detection of the reflected signal. LIDAR


    In general there are two types of lidar systems: micropulse lidar systems and high energy systems. Micropulse systems have developed as a result of the ever increasing amount of computer power available combined with advances in laser technology. They use considerably less energy in the laser, typically on the order of one microjoule, and are often "eye-safe," meaning they can be used without safety precautions. High-power systems are common in atmospheric research, where they are widely used for measuring many atmospheric parameters: the height, layering and densities of clouds, cloud particle properties (extinction coefficient, backscatter coefficient, depolarization), temperature, pressure, wind, humidity, trace gas concentration (ozone, methane, nitrous oxide, etc.)[1].

      الوقت/التاريخ الآن هو 24/5/2018, 7:05 am