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Developement of small photoelastic transparent oxide glasses with ubiquitous elements

Research Project

Project/Area Number 21K04652
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 26020:Inorganic materials and properties-related
Research InstitutionEhime University

Principal Investigator

Saitoh Akira  愛媛大学, 理工学研究科(工学系), 教授 (80431328)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords酸化物ガラス / 光学特性 / 光弾性 / 構造 / 汎用元素 / 無色透明酸化物ガラス / 屈折率 / 光弾性定数
Outline of Research at the Start

液晶プロジェクター用のレンズ,フィルターのように,厳密な偏光制御をともなう光学ガラス素子では,極めて小さな応力誘起複屈折性(ゼロ光弾性)が必須な機能である。光学ガラスの製造,使用,廃棄を環境に配慮して実施するためには,現行ガラスに含まれる高分極性Pb2+イオンを排除した新規ガラスが必要である。本研究では,汎用元素を用いた無色透明な酸化物ガラスの提案,複雑な組成によらない低光弾性・高屈折率性の発現と検証,ガラスの微細構造に立ちかえった機能性の解明を行う。元素選択と構造特異性に関する科学的根拠を提示し,ゼロ光弾性,無色透明,有害元素フリーで持続可能な光学素子の開発につなげる。

Outline of Final Research Achievements

We have made ubiquitous element-based oxide glasses with compositions for optical lens and prism applications. We have developed oxide glasses with so-called zero photoelasticity, i.e., photoelastic constants smaller than |0.05 x 10-12 Pa-1|, which can be obtained in various compositions containing SnO without toxic elements, leading to environmental destruction. Their photoelastic constants are smaller than |0.05 x 10-12 Pa-1|. The optical properties possess a refractive index of 1.7 or higher and colorless transparency in the visible light region.

Academic Significance and Societal Importance of the Research Achievements

酸化物ガラスの光弾性定数と屈折率は、高電子分極イオンが高濃度に含まれる点で、密接な相関性を有している。屈折率は、電子分極率に比例相関し,高分極性の金属酸化物を多量に含むことで屈折率を増加させるという従来から提唱されている考え方を,ユビキタス元素から成る酸化物ガラスに対して、構造情報に基づいた定量的データによって裏付けている。ガラスの光弾性定数に関する本年度の成果として,酸化物ガラス,特にリン酸塩ガラスの電子分極率を考えることによって,未知のガラス組成に対する光弾性定数を予測できることにある。偏光光学素子として,鉛のような毒性元素を全く用いずに,あらかじめ光学特性を予想
できる点が成果である。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (13 results)

All 2023 2022 Other

All Int'l Joint Research (3 results) Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results) Remarks (1 results)

  • [Int'l Joint Research] Rostock University(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] University of Lille(フランス)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] ISIS facility, Rutherford Appleton Lab.(英国)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Effect of SnO and Bi<sub>2</sub>O<sub>3</sub> on the elastic moduli of silicate glass with high refractivity and small photoelasticity2023

    • Author(s)
      Shimizu Tatsuki、Miyoshi Ryuta、Saitoh Akira
    • Journal Title

      Journal of the Ceramic Society of Japan

      Volume: 131 Issue: 7 Pages: 320-323

    • DOI

      10.2109/jcersj2.23043

    • ISSN
      1348-6535, 1882-0743
    • Year and Date
      2023-07-01
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of B2O3 substitution for P2O5 on the refractive index and optical absorption in pyro SnO-P2O5-B2O3 glasses2023

    • Author(s)
      Watanabe Yuta、Tricot Gregory、Shimizu Tatsuki、Saitoh Akira
    • Journal Title

      Optik

      Volume: 287 Pages: 171150-171150

    • DOI

      10.1016/j.ijleo.2023.171150

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Colorless, highly refractive, and zero photoelastic calcium tin phosphate glasses2022

    • Author(s)
      Miyoshi R.、Mitsui K.、Shimizu T.、Saitoh A.
    • Journal Title

      Optical Materials

      Volume: 133 Pages: 113074-113074

    • DOI

      10.1016/j.optmat.2022.113074

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Colorless SnO- and Sb<sub>2</sub>O<sub>3</sub>-containing borate and borosilicate glasses with small photoelastic and high refractive properties2022

    • Author(s)
      Mitsui Kazuki、Suzuki Keita、Saitoh Akira
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: 9 Pages: 095507-095507

    • DOI

      10.35848/1347-4065/ac87e2

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Properties and structure of ternary BaO-SnO-P2O5 glasses2022

    • Author(s)
      Hoppe U.、Saitoh A.、Shimizu T.、Tricot G.、Hannon A.C.
    • Journal Title

      Journal of Non-Crystalline Solids

      Volume: 597 Pages: 121909-121909

    • DOI

      10.1016/j.jnoncrysol.2022.121909

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effect of fluorine doping on the optical and mechanical properties of bismuth-containing silicate and borate glasses2022

    • Author(s)
      K. Hayashi, T. Shimizu, S. Matsuishi, H. Hiramatsu, and A. Saitoh
    • Journal Title

      J. Mater. Sci.: Mater. Electron.

      Volume: 33 Issue: 4 Pages: 2242-2256

    • DOI

      10.1007/s10854-021-07508-8

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Fe3O4ドーピングで実現する 電子伝導性Bi2O3-B2O3ガラス2023

    • Author(s)
      光井 和輝, フ ゾンシュ, 半沢 幸太, 片瀬 貴義, 平松 秀典, 斎藤 全
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Effect of B2O3 substitution for P2O5 on optical properties in pyro tin boro-phosphate glasses2023

    • Author(s)
      Akira Saitoh, Yuta Watanabe, Gregory Tricot
    • Organizer
      3rd International Conference on Phosphate Materials
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 低光弾性スズリン酸塩ガラスの簡便な合成方法2023

    • Author(s)
      三好隆太,斎藤 全
    • Organizer
      第70回(2023年春季) 応用物理学会春季学術講演会
    • Related Report
      2022 Research-status Report
  • [Remarks] 愛媛大学 大学院理工学研究科 フォトニクス材料工学研究室

    • URL

      https://www.mat.ehime-u.ac.jp/labs/pme/

    • Related Report
      2022 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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