A multi-camera speckle interferometer for dynamic full-field 3D displacement measurement: Validation and inflation testing of a human eye sclera

作者：Bruno Luigi; Bianco Gianfranco; Fazio Massimo A^*

来源：Optics and Lasers in Engineering, 2018, 107: 91-101.

DOI：10.1016/j.optlaseng.2018.03.012

• Speckle interferometry
• Ocular biomechanics
• Ophthalmology
• Mechanical characterization
• Eye tissue
• Time-dependent deformations

We developed and optimized a custom dynamic Electronic Speckle Pattern Interferometer (d-ESPI) for measuring time-dependent three-dimensional (3D) surface displacements during inflation testing of ocular tissues. The 3D displacement field was resolved under dynamic loading conditions for a simplified test case of a rubber phantom and a real-world test case of the posterior sclera of a human eye. We present the optical layout and calibration procedure of the d-ESPI, and demonstrate how the displacement field can be accurately resolved for specimen deformation rates up to 6 mu m/s.

• 出版日期2018-8