Pages 175-176
In this study, the deflection distribution of a cantilever is measured combining the holographic interferometry and phase-shifting digital holography. Holographic interferometry can measure with high accuracy, high sensitivity, and full-field by noncontacting. But the development processing of a film is troublesome by holographic interferometry. Digital holography record on CCD and it reconstructs it with a computer. Therefore, development processing is not needed and it is early reproducible by digital holography. Digital holography has the amplitudes information and phase information in digital information. By the holographic interferometer, the sum of complex amplitude before and after deformation is reconstructed. In this study, the sum of complex amplitude before and after deformation is calculated and reconstructed. Therefore, phase difference computed for digital information and the displacement of a nano-meter order will be able to measure with this method.
