AI Article Synopsis
- A new method using digital holographic microscopy (DHM) is introduced to measure the orientations of transparent ellipsoidal particles by capturing images at various depths.
- The technique involves analyzing unique light scatterings from the ellipsoids based on their orientation, using a focus function to create an image that indicates the in-plane orientation of the particle.
- The method has been validated with known orientation ellipsoids and successfully applied to ellipsoids in random orientations within a pipe flow, highlighting its potential for applications in analyzing particle dynamics.
Article Abstract
A method to measure the orientations of transparent ellipsoidal particles using digital holographic microscopy (DHM) is proposed in this study. This approach includes volumetric recording and numerical reconstruction at different depths. Distinctive light scatterings from an ellipsoid with different angles of orientation are analyzed. A focus function is applied to obtain a reconstructed image that contains a bright line parallel to the major axis of the projected particle, which provides in-plane orientation information. An intensity profile is collected along the major axis of the projected particle in the direction of the optical axis, and this profile is then utilized to measure the out-of-plane orientation of the ellipsoid. After being verified for an ellipsoid with known orientations, the proposed method is applied to ellipsoids suspended in a pipe flow with random orientations. This DHM method can extract the essential information of ellipsoids and therefore has great potential applications in particle dynamics.
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| http://dx.doi.org/10.1364/OE.24.000598 | DOI Listing |
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