Shadow Doppler technique for sizing particles of arbitrary shape

Y. Hardalupas, K. Hishida, M. Maeda, H. Morikita, A. M.K.P. Taylor, J. H. Whitelaw

研究成果: Article査読

38 被引用数 (Scopus)


The output from a linear diode array is used in a modified laser Doppler velocimeter to measure the size and shape of irregular particles. The sizing accuracy for transparent and opaque particles between 30 and 140, um is better than 10%. The inaccuracy caused by trajectories that lay at angles of less than 240 to the axis of the array was less than ±5%, and a further inaccuracy of ±5% was caused by defocusing of the particle from the center of the velocimeter measuring volume by up to ±500 µm. The advantages of the shadow Doppler technique over other techniques for sizing irregular particles, such as amplitude systems with pointer volumes, are that the shadow Doppler technique records shape, the optical arrangement is more robust, less precise alignment is required, and the equipment can be constructed at low cost.

ジャーナルApplied Optics
出版ステータスPublished - 1994 12月 20

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 工学(その他)
  • 電子工学および電気工学


「Shadow Doppler technique for sizing particles of arbitrary shape」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。