The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
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Volume 48, Issue 2
Special Issue on Advanced Laser Technology for Automotive Applications
Displaying 1-7 of 7 articles from this issue
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  • Preface to Special Issue on Advanced Laser Technology for Automotive Applications
    Takunori TAIRA
    2020 Volume 48 Issue 2 Pages 62-
    Published: 2020
    Released on J-STAGE: June 23, 2022
    DOIhttps://doi.org/10.2184/lsj.48.2_62
    JOURNAL FREE ACCESS
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  • Global Trends in Automotive Laser Applications
    Kunihiko WASHIO
    2020 Volume 48 Issue 2 Pages 63-
    Published: 2020
    Released on J-STAGE: June 23, 2022
    DOIhttps://doi.org/10.2184/lsj.48.2_63
    JOURNAL FREE ACCESS
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    Global trends in automotive laser applications are briefly reviewed, with focus on market and technology trends in laser materials processing for automobile manufacturing and LiDARs toward autonomous driving.
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  • Application of Laser Processing Technology to TNGA Engine
    Tsukasa HASHIOKA, Yusuke OISHI
    2020 Volume 48 Issue 2 Pages 68-
    Published: 2020
    Released on J-STAGE: June 23, 2022
    DOIhttps://doi.org/10.2184/lsj.48.2_68
    JOURNAL FREE ACCESS
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    Toyota Motor Corporation has developed a new series of engines based on the Toyota New Global Architecture (TNGA) design philosophy with even better fuel economy and stronger dynamic performance. These engines incorporate innovative design elements that boost combustion speed, helping to achieve thermal efficiency in excess of 40% and specific power of 60 kW/L. Essential elements for high-speed combustion are the coefficient of flow at the intake port and the tumble ratio. Laser clad valve seats were adopted to enhance both of these elements. This paper describes the development of a laser cladding process that improves production efficiency and reduces the size of the cladding machine, with the aim of enabling the production of the TNGA engine series for different markets around the world.
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  • Toward the Realization of Stamp-Size LiDAR
    Toshihiko BABA
    2020 Volume 48 Issue 2 Pages 73-
    Published: 2020
    Released on J-STAGE: June 23, 2022
    DOIhttps://doi.org/10.2184/lsj.48.2_73
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    Light detection and ranging (LiDAR) that detects three-dimensional information of surrounding objects are attracting much attention in these years with topics on autonomous vehicles, robots and drones. However, conventional LiDAR devices are large and costly, mainly because of using a mechanical beam steering device, which hampers their wide range of applications. Therefore, various nonmechanical LiDAR devices, such as flash-type, phased-array-type and slow-light-type, are being developed extensively. This paper explains principles of different types of LiDAR devices, their performance and essential constrains, and requirements for each LiDAR component. The paper also focuses on a challenge toward the realization of stamp-size nonmechanical LiDAR.
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  • LIDAR and Laser Technologies for Automated Driving
    Hitoshi YAMADA, Kenichi YANAI
    2020 Volume 48 Issue 2 Pages 78-
    Published: 2020
    Released on J-STAGE: June 23, 2022
    DOIhttps://doi.org/10.2184/lsj.48.2_78
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    The race to develop automated driving technologies is challenging. In order to realize automated driving, sensors that detect obstacles in a vehicle’s path and a fusion of multiple sensor inputs surrounding a vehicle are necessary. As a result, Light Detection and Ranging (LIDAR) sensor technology is expected to be dominant in this space, along with millimeter-wave RADAR and cameras. Recent trends in LIDAR and Laser technologies for automated driving are reviewed here.
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  • Trends and Prospects of Visible Laser Application to Automobiles
    Kazuhisa YAMAMOTO
    2020 Volume 48 Issue 2 Pages 83-
    Published: 2020
    Released on J-STAGE: June 23, 2022
    DOIhttps://doi.org/10.2184/lsj.48.2_83
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    Although laser processing has been the main laser application for automobiles, the development of various laser applications has been accelerating. This paper describes the features, the problems, and the prospects of visible laser applications and focuses on laser lighting and display applications in this field.
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  • Detection of Moving Objects and Laser Power Supply by Visible Laser Diode
    Masato ISHINO, Toshiyuki KITAMURA, Tomoyuki OHASHI, Akira TAKAMORI ...
    2020 Volume 48 Issue 2 Pages 88-
    Published: 2020
    Released on J-STAGE: June 23, 2022
    DOIhttps://doi.org/10.2184/lsj.48.2_88
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    We investigated LiDAR using visible light laser diodes (LDs) and an optical power supply using visible laser diode (LD) are investigated. With LiDAR using a red LD, we obtained characteristics that ranged up to about 8 m, even with a 10% reflective blackboard, and about 3 times that with a 90% reflective white board. In addition, a laser power supply with a visible LD was achieved with more than 90% light transmission efficiency in both the red and the blue LDs. We also successfully demonstrated visible-laser feeding to a moving object that was detected by visible-light LiDAR.
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