Translational velocity measurement for single floating cell based on optical Fourier transform theory

Katsumi Ishizaki, Ichirou Ishimaru, Makoto Yoshida, Yusuke Inoue, Toshiki Yasokawa, Shigeki Kuriyama, Tsutomu Masaki, Seiji Nakai, Kaoru Takegawa, Naotaka Tanaka

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Abstract

This letter reports on translational velocity measurement, which is needed for tracking a low contrast cell. We propose a new optical spatial filtering method that is based on the optical Fourier transform theory. In this method, a pinhole is installed as a spatial filter on the optical Fourier transform plane. By means of this spatial filter, the arbitrary component of the spatial frequency is derived from the random refractive index distribution as the periodic light intensity distribution. By observing the changes of this light intensity, we can obtain the translational velocity of a low-contrast cell by means of a high-response photodiode.

Original languageEnglish
Article number101114
JournalApplied Physics Letters
Volume88
Issue number10
DOIs
Publication statusPublished - Mar 20 2006
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Ishizaki, K., Ishimaru, I., Yoshida, M., Inoue, Y., Yasokawa, T., Kuriyama, S., ... Tanaka, N. (2006). Translational velocity measurement for single floating cell based on optical Fourier transform theory. Applied Physics Letters, 88(10), [101114]. https://doi.org/10.1063/1.2183747