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Jitter reduction techniques for high-range precision time-of-flight range imagers

Research Project

Project/Area Number 19H02194
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 21060:Electron device and electronic equipment-related
Research InstitutionShizuoka University

Principal Investigator

Keita Yasutomi  静岡大学, 電子工学研究所, 准教授 (50621661)

Co-Investigator(Kenkyū-buntansha) 飯久保 正弘  東北大学, 歯学研究科, 教授 (80302157)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2020: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
KeywordsTime-of-Flight / イメージセンサ / 3次元計測 / 距離撮像装置 / 3次元計測 / 工業計測 / 歯科応用
Outline of Research at the Start

光飛行時間型(Time-of-Flight: TOF)による距離撮像カメラは、距離分解能(距離精度)が数ミリメートルと乏しく、物体認識用途に限られている。この距離分解能を数10マイクロメートルまで高めることができれば、計測分野への応用展開が可能となり、TOF法の強みである小
型・高速性を享受した新たな3次元計測デバイスの創出につながる。本研究では、現在距離分解能を律速する要因となっているゲート信号の時間ゆらぎ(ジッタ)を低減する手法を確立し、TOF距離撮像装置としての極限的な距離分解能達成を追究する。

Outline of Final Research Achievements

In this study, for achieving the extremely high range precision using time-of-flight (TOF) range imagers, we have proposed and demonstrated jitter reduction techniques to reduce column-driver jitters, which is the dominant factor in range precision.
The first technique, DRPS, uses an additional light source to generate a column-parallel reference. It has demonstrated a range precision of 52um (single frame) and 27um (10 frames average). The second technique, CI-RPS, uses pseudo photocurrent generated by charge injection. CI-RPS does not require additional light sources and any optical components. The prototype chip has demonstrated a range precision of 55um (single frame) and 38um (10 frames average).

Academic Significance and Societal Importance of the Research Achievements

光の飛行時間(TOF: Time-of-Flight)を利用した距離イメージングは、リアルタイム処理や装置の小型化、安価なシステムの構築などから、ジェスチャや物体の「認識」のために開発されている.これを「計測」のための応用まで広げるためには,TOF距離撮像素子の距離精度の改善が欠かせない.本研究では,50umを超える距離精度を実現するためのTOF距離撮像素子のジッタ低減手法を提供するものである.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (15 results)

All 2022 2021 2020 2019

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (10 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Lock-in Pixel Based Time-of-Flight Range Imagers: An Overview2022

    • Author(s)
      YASUTOMI Keita、KAWAHITO Shoji
    • Journal Title

      IEICE Transactions on Electronics

      Volume: E105.C Issue: 7 Pages: 301-315

    • DOI

      10.1587/transele.2021CDP0004

    • NAID

      130008139684

    • ISSN
      0916-8524, 1745-1353
    • Year and Date
      2022-07-01
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Range-precision improvement of a time-of-flight range sensor using dual reference plane sampling2021

    • Author(s)
      Furuhashi Tatsuki、Yasutomi Keita、Hatada Ryosuke、Tamaya Mitsuru、Kagawa Keiichiro、Kawahito Shoji
    • Journal Title

      Optics Express

      Volume: 29 Issue: 23 Pages: 38324-38324

    • DOI

      10.1364/oe.441219

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 計測分野へ向けた高精度な距離・形状計測を実現するTOF距離イメージセンサ2021

    • Author(s)
      安富啓太
    • Journal Title

      OPTRONICS

      Volume: 5 Pages: 140-144

    • Related Report
      2020 Annual Research Report
  • [Journal Article] A Sub-100 um-Range-Resolution Time-of-Flight Range Image Sensor With Three-Tap Lock-In Pixels, Non-Overlapping Gate Clock, and Reference Plane Sampling2019

    • Author(s)
      Yasutomi Keita、Okura Yushi、Kagawa Keiichiro、Kawahito Shoji
    • Journal Title

      IEEE Journal of Solid-State Circuits

      Volume: 54 Issue: 8 Pages: 2291-2303

    • DOI

      10.1109/jssc.2019.2916310

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] A 38μm Range Precision Time-of-Flight CMOS Range Line Imager with Gating Driver Jitter Reduction Using Charge-Injection Pseudo Photocurrent Reference2022

    • Author(s)
      Keita Yasutomi, Tatsuki Furuhashi, Koki Sagawa, Taishi Takasawa, Keiichiro Kagawa, Shoji Kawahito
    • Organizer
      International Solid-State Circuits 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A back-illuminated SOI-based 4-tap lock-in pixel with high NIR sensitivity for TOF range image sensors2022

    • Author(s)
      N. Takada,K. Yasutomi,H. Kawanishi,K. Tada,T. Kobayashi,A. Yabata,H. Kasai,N. Miura,M. Okihara, S. Kawahito
    • Organizer
      Electronic Imaging2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 電荷注入による疑似列参照光を用いた列ドライバジッタ低減機能を有する高距離精度TOFセンサ2022

    • Author(s)
      安富啓太,古橋樹,佐川航輝,高澤大志,香川景一郎,川人祥二
    • Organizer
      映像情報メディア学会情報センシング研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Recent Progress of Time-of-Flight Range Imagers2021

    • Author(s)
      K. Yasutomi, S. Kawahito
    • Organizer
      International Display Workshop 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] "A 4-tap Lock-in Pixel Time-of-Flight Range Imager with Substrate Biasing and DoubleDelta Correlated Multiple Sampling2021

    • Author(s)
      K. Yasutomi, M. Inoue, S. Daikoku, M. Kamel, S. Kawahito
    • Organizer
      2021 INTERNATIONAL IMAGE SENSOR WORKSHOP
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ジッタ低減によるサブ100um精度を有するTOF距離センサ2021

    • Author(s)
      安富啓太, 川人祥二
    • Organizer
      ,映像情報メディア学会情報センシング研究会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 高距離分解能TOFセンサのための二重参照光サンプリング法を用いたジッタ低減手法の検討2021

    • Author(s)
      古橋 樹,安富啓太,畑田崚介,香川景一郎,川人祥二
    • Organizer
      映像情報メディア学会情報センシング研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高精度な距離・形状測定を実現するTOF距離イメージセンサ2020

    • Author(s)
      安富啓太
    • Organizer
      JST新技術説明会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 高速ロックインピクセル技術による時間分解イメージング~高距離分解能Time-of-Flight距離イメージングなどの紹介~2020

    • Author(s)
      安富啓太
    • Organizer
      東京都医工連携HUB機構 "光の尖端都市「浜松」発のシーズ"
    • Related Report
      2020 Annual Research Report
  • [Presentation] Time-of-Flight距離イメージセンサのための裏面照射型全空乏SOIロックイン画素の特性評価2020

    • Author(s)
      河西穂高, 安富啓太, 高田直樹, 谷畑篤史, 葛西大樹, 柴口 拓, 三浦規之, 川人祥二
    • Organizer
      映像情報メディア学会創立70周年記念大会
    • Related Report
      2020 Annual Research Report
  • [Patent(Industrial Property Rights)] 距離計測装置及び距離計測方法2022

    • Inventor(s)
      安富啓太
    • Industrial Property Rights Holder
      静岡大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-018574
    • Filing Date
      2022
    • Related Report
      2021 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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