Strength test of a mobile phone screen by means of the levitated-mass method

Tomokazu Suzuki, Yusaku Fujii, J. D R Valera

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


An optical method for evaluating the strength of general industrial products is proposed in this paper. In the method, a levitated mass encountering negligible friction is made to collide with a general industrial product under test. During the collision, the Doppler frequency shift of a laser beam reflecting from the mass is accurately measured using an optical interferometer. The velocity, position, acceleration and inertial force of the mass are calculated from the measured time-varying Doppler shift. To demonstrate the performance of the method an experiment was done using a mobile phone as an example of a general industrial product. The mechanical response of general industrial products is accurately determined with the proposed method.

Original languageEnglish
Title of host publicationProceedings of the SICE Annual Conference
Subtitle of host publicationSICE Annual Conference 2004; Sapporo; Japan; 4 August 2004 through 6 August 2004
Number of pages4
Publication statusPublished - 2004
EventSICE Annual Conference 2004 - Sapporo, Japan
Duration: 4 Aug 20046 Aug 2004


ConferenceSICE Annual Conference 2004


  • Dynamic force
  • Optical interferometer pneumatic linear bearing
  • Strength test


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