Length Standards Group

Length Standards are foundation of industries and sciences. We at Length Standards Section devote ourselves to various tasks in order to establish metrological standards and calibration system in the area of length (gauge blocks, line scales, EDM, laser interferometer, , step height, and refractive index) and deviation (flatness and sphericity) metrology. We construct efficient hierarchical traceability system in cooperation with calibration laboratories. At the same time, we conduct research and development activities regarding advanced length measurement science and technology.

What's New

Released on Mar. 18, 2024

The research group's phone number and fax number will be discontinued. For future communications and inquiries, please call or email the member directly, or the group's email address for inquiries.

Released on Jan. 11, 2024

A paper on error investigation for SI traceable pitch calibration of one-dimensional grating by grazing-incidence small-angle X-ray scattering, authored by Dr. Hori, has been published.

Yasuaki Hori and Satoshi Gonda, "Error investigation for SI traceable pitch calibration of one-dimensional grating by grazing-incidence small-angle X-ray scattering," Measurement, 225, 114036 (2024).(New window will open.)

Released on Dec. 25, 2023

Workshop of 2023FY annual research results of NMIJ (in Japanese) will be held from Feb. 1(Thu) to Feb. 2 (Fri), 2024 (given in Japanese). There will be six poster presentations from our group. Participation registration is required. Your cooperation with advance registration by Janyary 29(Mon), 2024 is appreciated.(Finished.)

Released on Dec. 22, 2022

Workshop of 2022FY annual research results of NMIJ (in Japanese) will be held on the web from Jan. 30(Mon) to Feb. 3 (Fri), 2023 (given in Japanese). There will be four poster presentations and a video of the laboratory tour from our group. Participation registration is required. Your cooperation with advance registration by 9:00 am on Janyary 30(Mon), 2023 is appreciated.
(Updated on Jan. 13, 2023: Our group's poster presentation will be held on Wednesday, February 1 in the afternoon. You can have a conversation with the presenter in the virtual space.)(Finished.)

Released on Dec. 2, 2022

Dr. Hirai wrote a commentary on the November 22nd edition of the Mainichi Shogakusei Shimbun's series "Fushigi no Himitsukichi" under the title of "Various Lights".

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Update List

Mar. 18, 2024: Inquiry page of Inquiry · Access Guide is updated.
(The phone number and fax number of our research group have been deleted because these will be discontinued.)
Mar. 18, 2024: Update Dr. Hirai's page.
Oct. 05, 2023: Japanese page of Inquiry · Access Guide is updated.
(The address in Japanese has slightly changed due to reorganization. The address in English has not changed.)
Apr. 03, 2023: Update Members page.
(Dr. Kondo has returned from his secondment. Dr. Masuda has joined.)
Dec. 02, 2022: Update Dr. Hirai's page.
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