Since 2007, every Optica topical meeting on Digital Holography and 3D Imaging (DH) has offered the opportunity to authors to submit their research in a feature issue of Applied Optics. AO and JOSA A began offering the feature jointly in 2017 to reflect the diversity of topics discussed during the conference.

DH’23 took place in August 2023 in Boston, Massachusetts, and was held in conjunction with the Optica Imaging Congress. It was a great success, with 117 accepted presentations running in parallel sessions over four days. The DH Topical Meeting is recognized as the world’s premier forum for science, technology, and applications of digital holography, 3D imaging, and display methods. The conference includes multiple sessions on the following:

In addition to the familiar topics usually covered by the DH conference, the 2023 incarnation also included the Radiographic Imaging and Tomography (RadIT) conference, dedicated to Radiographic Imaging and Tomography. The RadIT symposium was particularly popular, with 21 presentations. The similitude with optical diffraction and 3D imaging meant that the audience was invited to cross from one domain to the other, and to discuss techniques that can breach conventional frontiers.

The present feature issue includes many excellent contributions, of which 17 are published in AO and 9 in JOSA A. All submitted papers, including the invited papers, underwent strict peer review. Together, these articles present the most up-to-date technological developments that are currently underway in digital holography and 3D imaging. Our hope is that they will stimulate novel discoveries and applications.

The topical editors would like to thank all contributors and reviewers, without whom this feature issue would not have been possible. Finally, we wish the very best for the upcoming Digital Holography and 3D Imaging Conference DH’24, which will be held 3–6 June in Paestum, Italy, as a stand-alone conference.