Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2022 Dec 3;12:20920. doi: 10.1038/s41598-022-25380-2

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Comparison of in-phase (↑↑) and opposite-phase (↑↓) configuration for the situation of two foci (N = 2) for different inter-focal distances Λ. (a)–(c) Phase holograms in the aperture plane (z = 0) for the ↑↑ case: (a) Λ₁ = 2 d_min, (b) Λ₂ = 4/3 d_min, (c) Λ₃ = 2/3 d_min, together with their unwrapped phase profiles (having the 2π modulus removed) along y = 0 shown in (d). (e)–(h) Respective phase distributions for the ↑↓ scenario. (i)–(k) Intensity distributions in the focal plane (z = f) obtained from the holograms shown in (a)–(c) (↑↑ case). (l) Corresponding profiles along y = 0 direction (horizontal dashed lines in (i)–(k)). (m)–(p) Corresponding distributions for the ↑↓ case (scenarios (e)–(h)). Note that the yellow curve in (p) is identical to and lies underneath the black curve. The maximum intensity (I₀) of all double focus distributions was used for normalization of the data in (i), (j), and (l)–(p). For better visibility, the data in (k) were normalized by 2I₀.