Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session A21: Experimental Techniques: Aerodynamics/High-Speed Flow
8:00 AM–9:57 AM,
Sunday, November 19, 2023
Room: 147A
Chair: Saikishan Suryanarayanan, The University of Akron
Abstract: A21.00006 : Integral Imaging Microscope for measurements in near wall fluid flow
9:05 AM–9:18 AM
Presenter:
Sabine Portal
(George Washington University)
Authors:
Sabine Portal
(George Washington University)
Steven W Williams
(George Washington University)
Mark Yamakaitis
(George Washington University)
Philippe Bardet
(George Washington University)
The system’s performance is characterized in terms of lateral resolution, FOV, Depth of field (DOF) and 3D reconstructions of the images. The axial and lateral resolution of the system at focus is determined by the size of the diffraction-limited spot beneath a single microlens. The computation of the PSF (Point Spread Function) and MTF (Modulation Transfer Function) allows us to determine the most advantageous imager in term of resolution and compactness. By playing both with the distances and the optical elements (focal length, quantity of elements, …), the change in the MTF, is immediate and this can be used to improve our imager. A Zemax model of the microscope, a powerful and versatile optical software that offers ray optics visualization as well as wave optics computation, is depicted along with its calculated performance and comparison to the final design.
This instrument allows for compact stereoscopic measurements for different laboratory scenarios, mainly for biological samples. Because of its compactness and flexibility, we want to adapt this imaging technique for measurements in near wall fluid flow.
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