Abstract

Due to limits in the properties of digital cameras, in-line digital holography is commonly used to take full advantage of the sampling space of the camera. To realize the dynamic high-resolution measurement of in-line digital holography, dual-camera dynamic in-line digital holography is proposed. By means of a two-step phase-shifting cepstrum algorithm and a dual-camera parallel phase-shifting recording optical path, the complex amplitude of the object wave can be reconstructed without its zero-order and conjugate terms. Meanwhile, a novel spherical wave interference calibration method is also developed for the dual-camera recording system, and image correction is carried out via rotation, translation, and diffraction, with an average error of phase correction of 0.1107 rad. Finally, the feasibility and effectiveness of the proposed technique is well demonstrated by a practical application of dynamic temperature field measurement in a transparent medium.

© 2020 Optical Society of America

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Supplementary Material (1)

NameDescription
» Visualization 1       The dynamic temperature field in an optical glass under thermal loading measured by the dual-camera in-line digital holography.

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