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Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.

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Related Experiment Video

Updated: Jul 8, 2026

Characterization of Anisotropic Leaky Mode Modulators for Holovideo
09:36

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

New design for a photoelastic modulator.

J C Canit1, J Badoz

  • 1ESPCI, Laboratoire d'Optique Physique, 10, rue Vauquelin, 75231 Paris CEDEX 05, France.

Applied Optics
|February 15, 1983
PubMed
Summary

A novel photoelastic modulator utilizes shear stresses to create longitudinal resonance vibrations, enabling precise light polarization modulation. This new design, using ceramics, is simpler to build and minimizes stray birefringence.

Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Light polarization modulation is crucial for various optical applications.
  • Traditional photoelastic modulators often involve complex construction and potential for stray birefringence.

Purpose of the Study:

  • To introduce a new photoelastic modulator design.
  • To demonstrate a simpler and more effective method for achieving birefringence modulation.

Main Methods:

  • The new modulator generates longitudinal resonance vibrations via shear stresses.
  • Thin ceramic elements are bonded to the material to induce these stresses.
  • Birefringence modulation is achieved through the induced stress-strain relationship.

Main Results:

  • The ceramic-based design offers significantly easier construction compared to previous apparatus.

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Last Updated: Jul 8, 2026

Characterization of Anisotropic Leaky Mode Modulators for Holovideo
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Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery
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  • The instrument demonstrates very low levels of stray birefringence.
  • The modulator effectively achieves periodic birefringence for light polarization control.

    • Conclusions:

    • The developed photoelastic modulator presents a practical and accessible solution for light polarization control.
    • Its simplified construction and low stray birefringence make it advantageous for scientific instrumentation.