STI Hybrid Seminar: Tuesday, 13 June 2023 at 2 pm (CEST)

[STI Secretariat]

_____________

STI  seminar
___________

You are most cordially invited to a seminar organized by the ICTP 
Science Technology and Innovation Unit (STI Unit)


** * * Tuesday, 13 June 2023 at 14:00 (Rome/CEST time)** * *

In person:**Luigi Stasi Seminar Room, Leonardo Building

Zoom (please register in advance): 
https://zoom.us/meeting/register/tJMrdeCqrzMpGdHDok-OxmD19xAzrzR86gDJ


Speaker: *Arun Anand* (Department of Physics, Sardar Patel University, 
Vallabh Vidyanagar, India)

Title: *Digital holography: Quantitative phase imaging of macro and 
micro samples*


Abstract:

Light detectors only capture the intensity variations of electromagnetic 
waves interacting with an object/sample, resulting in the loss of the 
phase information, which is highly sensitive to even minor optical path 
length changes.

Holography is a method to record both the amplitude and phase of the 
wavefront interacting with the sample (object wavefront), by combining 
it with a reference wavefront, leading to interference fringes, called 
holograms.

In digital holography, these interference fringes are sampled using a 
digital array and reconstructed by numerical methods yielding the 
amplitude and phase of the object wavefront. Digital holographic imaging 
provides high-contrast images of even transparent specimens as well 
their thickness/height profile. This approach also allows comparing 
wavefronts recorded at different times, leading to holographic 
interferometry which finds application across various domains, from 
nanometer-level deformation measurement to quantitative phase microscopy.

The presentation will explore our work on the development of digital 
holographic techniques for quantitative phase imaging of diffuse and 
transparent macro and microscopic samples for their characterization, 
identification, and classification.

**
-- 

Nicoletta Ivanissevich (Ms.)
Secretariat,
STI - Science, Technology and Innovation Unit
The Abdus Salam International Centre for Theoretical Physics
Strada Costiera, 11
I-34151 Trieste
Italy

Phone: +39-040-2240.383
STI Webpage:https://www.ictp.it/research/sti.aspx
Email:sti at ictp.it

--