A study on the optical diaphragm using magnetic fluid and a permanent magnet

S. Sudo, M. Shinozaki, H. Nishiyama

研究成果: Paper査読

抄録

This paper is concerned with a novel optical diaphragm using magnetic fluid and a permanent magnet. The optical diaphragm consisting of a kerosene-based magnetic fluid and a small ring-shaped Nd2Fe14B permanent magnet was designed. The magnetic fluid diaphragm was driven by the external magnetic field. The experimental apparatus consist of the test magnetic fluid diaphragm system and the optical measurement system. Frequency characteristics of the magnetic fluid diaphragm in the alternating magnetic field were studied experimentally. The alternating magnetic field was generated by applying alternating current voltage to a Helmholtz coil. The alternating current signal was supplied from the frequency synthesizer. The dynamic responses of magnetic fluid diaphragm were analyzed with a high-speed video camera system. It was revealed that the amplitude of magnetic fluid hole oscillation depended on the frequency of magnetic field. The effect of the applied voltage on the amplitude of hole oscillation was also revealed.

本文言語English
出版ステータスPublished - 2012 12 1
イベント23rd International Conference on Adaptive Structures and Technologies, ICAST 2012 - Nanjing, China
継続期間: 2012 10 112012 10 13

Other

Other23rd International Conference on Adaptive Structures and Technologies, ICAST 2012
国/地域China
CityNanjing
Period12/10/1112/10/13

ASJC Scopus subject areas

  • 土木構造工学
  • 電子工学および電気工学
  • 機械工学
  • 材料力学
  • 建築および建設

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