Apparatus for time‐resolved measurements of acoustic birefringence in particle dispersions

Mario Ettore Giardini, Ilaria Cristiani, Roberto Piazza, Vittorio Degiorgio

Research output: Contribution to journalArticle

Abstract

An apparatus for time‐resolved measurements of the birefringence induced in a particle suspension by an acoustic wave pulse is described. Efficient acoustic coupling is obtained by operating near the transducer resonant frequency and by matching the acoustic impedances of the cell constituents. An almost‐overdamped acoustic configuration can alternatively be employed whenever a faster response is needed. Careful design of the optical setup and of the detection unit minimize diffraction and stress‐birefringence parasitic effects and yields a good responsivity at fairly low acoustic intensities. A test of the apparatus on a colloidal suspension of PTFE rodlike particles is presented and discussed.
LanguageEnglish
Pages1077-1082
Number of pages6
JournalReview of Scientific Instruments
Volume66
DOIs
Publication statusPublished - 1995

Fingerprint

Birefringence
Time measurement
Dispersions
birefringence
Acoustics
time measurement
Acoustic intensity
Acoustic impedance
acoustics
Polytetrafluoroethylenes
acoustic coupling
Transducers
Natural frequencies
acoustic impedance
Diffraction
Acoustic waves
colloids
resonant frequencies
transducers
configurations

Keywords

  • time‐resolved measurements
  • apparatus
  • particle dispersions
  • acoustic birefringence

Cite this

Giardini, Mario Ettore ; Cristiani, Ilaria ; Piazza, Roberto ; Degiorgio, Vittorio. / Apparatus for time‐resolved measurements of acoustic birefringence in particle dispersions. In: Review of Scientific Instruments. 1995 ; Vol. 66. pp. 1077-1082.
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Apparatus for time‐resolved measurements of acoustic birefringence in particle dispersions. / Giardini, Mario Ettore; Cristiani, Ilaria; Piazza, Roberto; Degiorgio, Vittorio.

In: Review of Scientific Instruments, Vol. 66, 1995, p. 1077-1082.

Research output: Contribution to journalArticle

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