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 Dec. 16, 2024
- On Dec. 16, 2024, Dr. Kondo,
Dr. Hirai, Dr. Kawashima and
Dr. Bitou made an AIST press relase.
Achieving the world's highest level of precision in measuring the diameter of a sphere - One order of magnitude improvement in precision in measuring the shape of free-form lenses -(in Japanese)
It was reported in The Nikkei on Dec. 16, 2024 (in Japanese, New Window will open.). - Released on Dec. 9, 2024
- A paper on two-point diameter calibration of a sphere by a micro-coordinate measuring machine using a silicon gauge block, authored by Dr. Kondou, has been published online. Anyone can read or download the paper for free until January 26, 2025 from this link, without signing in or registering.
- Released on Dec. 5, 2024
- Dr. Kawashima received the Advanced Best Presentation Award at the Japan Society for Precision Engineering 2024 Autumn Conference (in Japanese, New window will open.). The title of her presentation was "Analysis of measurement errors due to misalignment in a spherical Fizeau interferometer."
- Released on Dec. 3, 2024
- Workshop of 2024FY annual research results of NMIJ (in Japanese) will be held from Jan. 16(Thu) to Jan. 17 (Fri), 2025 (given in Japanese). There will be one oral presentation and five poster presentations from our group. Participation registration is required. Your cooperation with advance registration by Janyary 10(Fri), 2025 is appreciated.
- Released on Dec. 3, 2024
- On Dec. 5, 2024, Dr. Kawashima,
Dr. Hirai, Dr. Kondo and
Dr. Bitou made an AIST press relase.
High-precision calibration of the surface profile of reference spherical lenses - Contributing to the development of high-precision optical elements and advanced product quality control -(in Japanese)
It was reported in OPTRONICS ONLINE on Nov. 29, 2024 (in Japanese, New Window will open.). -
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Update List
- 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) - 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.) -
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