Ultrahigh Precision Optics Technology Team

Team Leader

Yutaka Yamagata


Photo: Yutaka Yamagata


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Ultrahigh Precision Optics Technology Team,
RIKEN Center for Advanced Photonics

2-1 Hirosawa, Wako, Saitama 351-0198 Japan


Our team develops advanced ultrahigh-precision/micro fabrication technologies and their application to scientific apparatuses and devices to support advanced scientific research at RIKEN. Research and development plans of our team include the following four topics; (1) Development of ultrahigh-precision optics including design, fabrication, metrology and computational simulation; (2) Development of ultrahigh-precision/micro fabrication technologies; (3) Development of materials and devices for biology or biochemistry such as microfluidic immunoassay devices.
In all R&D topics, our team collaborates with laboratories inside and outside of RIKEN and helps them to construct the most advanced experimental apparatuses, which will lead to innovative scientific research results.


Engineering, Interdisciplinary science and engineering


Ultrahigh Precision Machining, Ultrahigh Precision Metrology, Aspherical Optics, Production Technology, Neutron Optics


  1. Fabrication, design, metrology and simulation of ultrahigh precision optics
  2. Fabrication of micro structure by precision machining
  3. Prototyping of precision optics in collaboration with Advanced Manufacturing Support Team

Ultrahigh precision machining and metrology of silicon crystal for pendellӧsung interferometry

Selected Publications

  1. Heacock, B., Fujiie, T., Haun, W.R.,.Henins, A., Hirota, K., Hosobata, T., Huber, M.G., Kitaguchi, M., Pushin, D.A., Shimizu, H., Takeda, M., Valdillez, R., Yamagata, Y., and Young, A.R.:"Pendellosung interferometry probes the neutron charge radius, lattice dynamics, and fifth forces", Science 373, 1239-1243 (2021).
  2. Yamada, N., L., Hosobata, T., Nemoto, F., Hori, K., Hino, M., Izumi, J., Suzuki, K., Hirayama, M., Kanno, R., and Yamagata, Y.: “Application of precise neutron focusing mirrors for neutron reflectometry: latest results and future prospects” , J. Appl. Cryst. 53 (2020).
  3. Saiki, T., Hosobata, T., Kono, Y., Takeda, M., Ishijima, A., Tamamitsu, M., Kitagawa, Y., Goda, K., Morita, S., Ozaki, S., Motohara, K., Yamagata, Y., Nakagawa, K., and Sakuma, I.: "Sequentially timed all-optical mapping photography boosted by a branched 4f system with a slicing mirror", Opt. Express 28, 31914-31922 (2020).
  4. Hosobata, T., Yamada, N., L., Hino, M., Yoshinaga, H., Nemoto, F., Hori, K., et al.: “Elliptic neutron-focusing supermirror for illuminating small samples in neutron reflectometry” , Optics Express Vol. 27, Issue 19, pp. 26807-26820 (2019), https://doi.org/10.1364/OE.27.026807
  5. Notake, T., Takeda, M., Okada, S., Hosobata, T., Yamagata, Y., and Minamide, H.: “Characterization of all second-order nonlinear-optical coefficients of organic N-benzyl-2-methyl-4-nitroaniline crystal” , Scientific Reports 9(1) (2019), DOI: 10.1038/s41598-019-50951-1


Yutaka YamagataTeam Leader
Koichiro ShirotaSenior Research Scientist
Yusuke TajimaSenior Research Scientist
Yoshiyuki TakizawaSenior Research Scientist
Tetsuya AoyamaSenior Research Scientist
Noboru EbizukaResearch Scientist
Hiroyoshi AokiResearch Scientist
Takuya HosobataSenior Research Scientist
Satoru EgawaSpecial Postdoctoral Researcher
Masahiro TakedaTechnical Staff Ⅰ