The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
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Volume 44, Issue 5
Special Issue on Laser 3D Measurement
Displaying 1-8 of 8 articles from this issue
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Special Issue on Laser 3D Measurement
Special Issue
Laser Review
  • Preface to Special Issue on Laser 3D Measurements
    Toshihiro SOMEKAWA
    2016 Volume 44 Issue 5 Pages 300-
    Published: 2016
    Released on J-STAGE: December 17, 2020
    DOIhttps://doi.org/10.2184/lsj.44.5_300
    JOURNAL OPEN ACCESS
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  • Medical Application for 3D Shape Measurement Method Based on Laser System
    Toshitaka WAKAYAMA, Toru YOSHIZAWA
    2016 Volume 44 Issue 5 Pages 301-
    Published: 2016
    Released on J-STAGE: December 17, 2020
    DOIhttps://doi.org/10.2184/lsj.44.5_301
    JOURNAL OPEN ACCESS
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    Three-dimensional (3D) shape measuring technology based on laser system has been utilized for many industrial applications. The 3D shape measurement is essential for the inspection and evaluation of the industrial products due to promise the product safety. To date, the importance of compactness, mobility, and high speed measurement on 3D shape measuring technology have been gradually increased. For 3D shape measurement, we have developed the inner profile measuring technology by use of a ring beam device which is consisted of a laser diode and a conical mirror, and high speed phase shifting technique which is based on fringe projection of spatio-temporal conversion. The 3D shape measurement technology has been available to industrial applications such as automobile, energy plant and heavy industry. This report is focused on medical applications for 3D shape measuring technology based on laser systems, such as total hip arthroplasty, prosthetic socket evaluation, and 3D position registration in radio treatment system.
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  • Environment Recognition for Autonomous Mobile Robots Using 3D Measurement Technologies
    Naohiro SHIMAJI
    2016 Volume 44 Issue 5 Pages 306-
    Published: 2016
    Released on J-STAGE: December 17, 2020
    DOIhttps://doi.org/10.2184/lsj.44.5_306
    JOURNAL OPEN ACCESS
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    Environment recognition is a fundamental task for service robots to move autonomously and coexist in the same environment with people. A service robot uses data from environment in order to avoid obstacles, estimate its position, detect traversable roads, etc. LiDARs (Light Detection and Ranging) are among the dominant technologies for environment recognition, in particular 2D LiDARs are vastly used. However, it has been argued how for outdoor environments two-dimensional planar data is not sufficient, therefore there is an increasing demand for 3D LiDARs. Recently, small-lightweight 3D LiDARs for mobile robots have been developed. During the “Tsukuba Challenge”, where service robots probe their autonomous functions, it has been demonstrated how 3D LiDARs are effectively used outdoors on real public environments meant for people's living. We discuss the existing problems in 3D LiDARs and, as LiDAR manufacturer, we present the features we seek in prospect lasers to extend performance and capabilities.
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  • High Speed Line Scanning Laser Sensor for Vehicle and Tire Detection
    Masaharu IMAKI, Nobuki KOTAKE, Shumpei KAMEYAMA, Takamitsu MORI, H ...
    2016 Volume 44 Issue 5 Pages 311-
    Published: 2016
    Released on J-STAGE: December 17, 2020
    DOIhttps://doi.org/10.2184/lsj.44.5_311
    JOURNAL OPEN ACCESS
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    We developed a high-speed line scanning laser sensor that has a wide field-of-view (FOV) for a fixed receiver. The FOV covers the entire region illuminated by laser scanning using a MEMS mirror. The sensor can acquire the intensity and range images with high resolution and can measure the vehicle’s shape with high spatial resolution for high-speed vehicles. We demonstrated the sensor performance for vehicle and tire detection in an electronic toll collection (ETC) gate and realized 100% vehicle detection and 99.99% tire detection in all-weather conditions. We also studied for the detection of vehicles that exceeded the legal restrictions on maximum vehicle dimensions and demonstrated±100 mm accuracy for width and height and 10% accuracy for vehicle length under all-weather conditions.
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  • Underwater 3D Imaging Laser Sensor
    Shumpei KAMEYAMA, Masaharu IMAKI, Hideaki OCHIMIZU, Takashi SAITO, ...
    2016 Volume 44 Issue 5 Pages 316-
    Published: 2016
    Released on J-STAGE: December 17, 2020
    DOIhttps://doi.org/10.2184/lsj.44.5_316
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    We developed for underwater 3D imaging a scanning laser sensor that has a dome lens and coaxial optics to realize a wide-scanning-angle. Our sensor also has a feature in the sensitivity time control (STC) circuit that detects small signals by suppressing the unwanted signals backscattered by marine snows. We demonstrated the system performance in a pool and confirmed a 3D imaging a maximum distance of 20 m. We mounted our system on an autonomous underwater vehicle (AUV) and demonstrated seafloor mapping at the depth of 100 m in the ocean.
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  • Application of 3D Laser Scanner to Forest Measurement
    Akira KATO
    2016 Volume 44 Issue 5 Pages 320-
    Published: 2016
    Released on J-STAGE: December 17, 2020
    DOIhttps://doi.org/10.2184/lsj.44.5_320
    JOURNAL OPEN ACCESS
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    Laser sensor has been developed to become portable to obtain 3D data efficiently. In forest application, 3D data derived by laser is getting more common as forest measuring technique. For global coverage, satellite laser sensor has been utilized and will be installed to monitor global forest change from international space station near the future. The problems caused by the current satellite laser sensor can be solved by new technologies like photon-counting laser with low energy and small beam divergence (higher ground resolution). For detail structure of trees, terrestrial laser sensor has been utilized. Recent terrestrial laser technology includes multi-spectral or hyper-spectral lasers to classify 3D points between leaves and branches simultaneously when the data is taken. This paper explains the current status of laser sensor development and shows the future direction of sensor usage in application of forest measurement.
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  • Forest Measurement Technique Using Airborne LiDAR
    Kazukiyo YAMAMOTO
    2016 Volume 44 Issue 5 Pages 326-
    Published: 2016
    Released on J-STAGE: December 17, 2020
    DOIhttps://doi.org/10.2184/lsj.44.5_326
    JOURNAL OPEN ACCESS
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    As world-wide concern for the global warming continues to grow, the roles of sinks and reservoirs on greenhouse gas in forests are receiving greater attention. To evaluate these roles in forests, we require detailed accurate information on the amount and structure of forest resources, especially aboveground biomass. Therefore, the importance of airborne LiDAR (Light Detection and Ranging) is increasing as a tool to obtain such information. This paper reviews the primary techniques for evaluating forest resources using airborne LiDAR.
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