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 Oct. 24, 2025
- Dr. Hirai received the 2025 Industrial Standardization Business Award (Minister of Economy, Trade and Industry Award) (in Japanese, New window will open). Her main achievements include contributing to the establishment of standards that contribute to improving the international competitiveness of Japan's manufacturing industry, primarily through deliberations on the establishment, revision, and abolition of JIS standards at the Japanese Industrial Standards Committee (JISC) and the Industrial Standards Development Committee in Machine Elements Area. For more details, please visit AIST website (in Japanese).
- Released on Oct. 22, 2025
- Dr. Masuda received the Advanced Best Presentation Award at the Japan Society for Precision Engineering 2025 Spring Conference (in Japanese, New window will open). The title of his presentation was "Freeform surface profile measurement based on local angle distribution using a self-calibrated rotary encoder -device development and basic verification-."
- Released on Mar. 17, 2025
- Dr. Hori's researche result, "Advanced Laser Interferometer," (in Japanese, new window will open) was featured in the "Opening up the Future with Technology - AIST's Challenge -" section of the Nikkan Kogyo Shimbun on March 13. It will be reposted on the AIST website (in Japanese) for a limited time after a few months.
- Released on Feb. 19, 2025
- An English version of the AIST press release regarding the measurement of a sphere diameter by Dr. Kondo, Dr. Hirai, Dr. Kawashima, and Dr. Bitou on December 16, 2024 was published on January 27, 2025.
- Released on Jan. 17, 2025
- An English version of the AIST press release regarding the surface profile calibration of a sphere by Dr. Kawashima, Dr. Hirai, Dr. Kondo and Dr. Bitou on November 28, 2024 was published on December 27, 2024.
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Update List
- Oct. 23, 2025
- Update Research page in Japanese.
(Add reviews by Dr. Hori and Dr. Kondo, add conference presentations by Dr. Kondo and Dr. Masuda.) - Jun. 15, 2025
- Research results such as papers has been listed on the Research page.
- Apr. 01, 2025
- Update Members page.
(Dr. Hori has been appointed as a group leader. Dr. Hirai is on loan to another department. Update the information of Dr. Masuda).
The person responsible for calibration of gauge blocks has been replaced. - Dec. 05, 2024
- Update Dr. Kawashima's page.
- Dec. 03, 2024
- Update Members page.
(Dr. Kondo's concurrent position has been deleted and his information has been updated. Update the information of Dr. Kawashima and Dr. Masuda) -
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