Engineering axial resolution realtime and postrecording of incoherent holograms using hybridization techniques

Shivasubramanian Gopinath; Aravind Simon John Francis Rajeswary; Vijayakumar Anand

doi:10.1117/12.3015742

15 February 2024 Engineering axial resolution realtime and postrecording of incoherent holograms using hybridization techniques

Shivasubramanian Gopinath, Aravind Simon John Francis Rajeswary, Vijayakumar Anand

Author Affiliations +

Proceedings Volume 13069, International Conference on Optical and Photonic Engineering (icOPEN 2023); 130690H (2024) https://doi.org/10.1117/12.3015742
Event: International Conference on Optical and Photonic Engineering (icOPEN 2023), 2023, Singapore, Singapore

Abstract

In incoherent digital holography (IDH) and in any imaging technique, the lateral and axial resolutions are intertwined and consequently changing one characteristic affects the other. In this study, we present two new hybridization techniques HM-1, and HM-2 for IDH, one for real-time and another for post-recording of holograms respectively, to engineer the axial resolution independent of lateral resolution. Two optical functions namely a lens and an axicon, with a low focal depth and a high focal depth respectively are considered. In both hybridization techniques, the axial resolution can be tuned between the limits of the axial resolutions of lens and axicon, while maintaining a constant lateral resolution. In HM-1, the axial resolution was engineered using a special phase mask designed using a modified version of Gerchberg-Saxton algorithm that can generate a spherical beam and Bessel beam for every object point and create self-interference between them. By controlling the strengths of the two beams, the axial resolution can be tuned without changing the lateral resolution. This method requires an active optical device such as a spatial light modulator. HM-2 involves two recordings of the same scene, one with a lens and another with an axicon which are then combined after recording. By controlling the weights of the two recordings, the axial resolution can be tuned between the limits of lens and the axicon independent of lateral resolution. In this case, passive diffractive or refractive optical elements are sufficient. Both hybridization techniques are implemented in indirect imaging mode consisting of three steps: recording point spread hologram, object hologram and reconstruction by Lucy-Richardson-Rosen algorithm.

Citation Download Citation

Shivasubramanian Gopinath, Aravind Simon John Francis Rajeswary, and Vijayakumar Anand "Engineering axial resolution realtime and postrecording of incoherent holograms using hybridization techniques", Proc. SPIE 13069, International Conference on Optical and Photonic Engineering (icOPEN 2023), 130690H (15 February 2024); https://doi.org/10.1117/12.3015742

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Axicons

Point spread functions

Holograms

Lawrencium

Reconstruction algorithms

Spatial light modulators

Algorithm development

Show All Keywords

Keywords/Phrases

Search In:

Publication Years