2023 BFY4 Abstract Detail Page
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| Abstract Title: |
W01: A laboratory for teaching coherent imaging principles and techniques |
| Abstract: |
We demonstrate our approach to teaching coherent imaging principles and techniques in the advanced lab using basic optical equipment. Starting from a single lens imaging setup, we introduce simple adjustments that allow the user to create dark-field and phase contrast images of optically transparent objects with subwavelength variations in optical path length. The dark-field imaging technique uses a wire to block the focus of the beam while the phase contrast imaging technique uses a phase line or phase dot. To understand these imaging techniques, students are introduced to Fourier imaging principles. We also demonstrate a simple way to introduce the concept of Coherent Diffraction Imaging using a similar setup. We start by imaging the diffraction pattern created by a pair of small pinholes. ImageJ is used for post-processing and analyzing the data. We discuss how phase retrieval techniques are used to retrieve an image of the pinholes from the diffraction pattern. |
| Abstract Type: |
Workshop
|
Author/Organizer Information |
| Primary Contact: |
Nathan David Powers
Brigham Young University
Provo, UT 84602
|
Co-Author(s)
and Co-Presenter(s) |
David D. Allred
Richard L. Sandberg
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