Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Bessel Speckles

Version 1 : Received: 25 July 2022 / Approved: 27 July 2022 / Online: 27 July 2022 (10:38:52 CEST)

How to cite: Anand, V. Bessel Speckles. Preprints 2022, 2022070421. https://doi.org/10.20944/preprints202207.0421.v1 Anand, V. Bessel Speckles. Preprints 2022, 2022070421. https://doi.org/10.20944/preprints202207.0421.v1

Abstract

Speckle patterns are formed by random interferences of mutually coherent beams. While speckles are often considered as an unwanted noise in many areas, they also formed the foundation for the development of numerous speckle-based imaging, holography and sensing technologies. In the recent years, artificial speckle patterns have been generated with spatially incoherent sources using static and dynamic optical modulators for advanced imaging applications. In this report, a fundamental study has been carried out with Bessel distribution as the fundamental building block of the speckle pattern: speckle patterns formed by randomly interfering Bessel beams. Indirect computational imaging framework has been applied to study the imaging characteristics. In general, Bessel beams have a long focal depth, which in this scenario is counteracted by the increase in randomness enabling tunability of the axial resolution between the limits of Bessel beam and a Gaussian beam. Three-dimensional computational imaging has been synthetically demonstrated. The presented study will lead to a new generation of incoherent imaging technologies.

Keywords

Bessel beams; Speckles; Imaging; Holography; Incoherent optics

Subject

Physical Sciences, Optics and Photonics

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.