Results 61 to 70 of about 190,665 (333)

Aero-optical characterization of aircraft optical turrets by holography, interferometry and shadowgraph [PDF]

, 1980
Density variations in the aircraft boundary layer, turret wakes and shock waves create distortion of an optical wavefront through associated refractive index variations. Such effects can be observed directly through optical flow visualization.
Trolinger, J. D.
core   +1 more source

Digital Holography Interferometry for Refractive Index Characterization and Temperature Mapping of Aqueous Solutions at Supercooled Temperatures

Laser &Photonics Reviews, Volume 19, Issue 9, May 6, 2025.
Digital holography interferometry (DHI) is used for thermal imaging and characterization of supercooled liquids. This work details a custom DHI platform with a thermoelectric cooling system capable of two‐dimensional temperature mapping and refractive index measurement of various aqueous solutions.
Crysthal Alvarez, Balaji Baskar, Carla Berrospe‐Rodriguez, Soheil Kavian, Ronald Sellers, Matthew J. Powell‐Palm, Guillermo Aguilar   +6 more
wiley   +1 more source

Two-mode squeezed vacuum and squeezed light in correlated interferometry [PDF]

Phys. Rev. A 92, 053821 (2015), 2015
We study in detail a system of two interferometers aimed to the detection of extremely faint phase-fluctuations. This system can represent a breakthrough for detecting a faint correlated signal that would remain otherwise undetectable even using the most sensitive individual interferometric devices, that are limited by the shot noise.
arxiv   +1 more source

Photopolymer Resins from Sulfenyl Chloride Commodity Chemicals for Plastic Optics, Photopatterning and 3D‐Printing

Advanced Materials, Volume 37, Issue 14, April 9, 2025.
From oil refining to high refractive index photopolymers for bulk plastic optics. The synthesis of a new photopolymer resin derived from inexpensive sulfur petrochemicals is reported affording a high‐quality optical glass that is amenable to a wide range of photopolymerization‐based fabricated methods, including 3D Printing, for precision plastic ...
Chisom Olikagu, Shafagh Khoshsorour, Satya D. Dulam, Hyun‐Seok Yu, Natasha A. Graham, Kyung‐Jo Kim, Byeongjoon Jeong, James L. Hedrick, Amber Bunnag‐Stoner, Kimberley Cheng, Benjamin L. Batchelor, Woongbi Cho, Seung Bin Park, Jeong Jae Wie, Young‐Jae Kim, Min‐Gap Bog, Nithiyaa Bala Krishnan, Yi Yan Yang, Jon T. Njardarson, Robert A. Norwood, Jeffrey Pyun   +20 more
wiley   +1 more source

Polarization‐Controlled Diffractions of Submicron Pillar Arrays of Azo Molecular Glass for Image Recording and Reconstruction

Advanced Photonics Research, Volume 6, Issue 3, March 2025.
Submicron pillar array of an azo molecular glass (IA‐Chol) is used as media for polarization recording, which is achieved through directional pillar deformations induced by the illumination. The pillar arrays generate different diffracted waves upon the polarizations of the incident beams used for recording and image reconstruction.
Zenan Wang, Chungen Hsu, Xiaogong Wang
wiley   +1 more source

Digital holographic interferometry for analyzing high density gradients in Fluid Mechanics

, 2017
Digital holographic interferometry has been developed by ONERA for analysing high refractive index variations encountered in fluids mechanics. Firstly, the authors present the analysis of a small supersonic jet using three different optical techniques ...
J. Desse, F. Olchewsky
semanticscholar   +1 more source

Holographic Beam Measurements of the Canadian Hydrogen Intensity Mapping Experiment (CHIME)

The Astrophysical Journal
We present the first results of the holographic beam-mapping program for the Canadian Hydrogen Intensity Mapping Experiment (CHIME). We describe the implementation of a holographic technique as adapted for CHIME, and introduce the processing pipeline ...
Mandana Amiri, Arnab Chakraborty, Simon Foreman, Mark Halpern, Alex S Hill, Gary Hinshaw, T. L. Landecker, Joshua MacEachern, Kiyoshi W. Masui, Juan Mena-Parra, Nikola Milutinovic, Laura Newburgh, Anna Ordog, Ue-Li Pen, Tristan Pinsonneault-Marotte, Alex Reda, Seth R. Siegel, Saurabh Singh, Haochen Wang, Dallas Wulf, The CHIME Collaboration   +20 more
doaj   +1 more source

A Combined Non-Invasive Approach to the Study of A Mosaic Model: First Laboratory Experimental Results

Journal of Imaging, 2019
This paper presents first laboratory results of a combined approach carried out by the use of three different portable non-invasive electromagnetic methods: Digital holographic speckle pattern interferometry (DHSPI), stimulated infrared thermography ...
Antonina Chaban, Vivi Tornari, Rita Deiana, Michalis Andrianakis, David Giovannacci, Vincent Detalle   +5 more
doaj   +1 more source

Non-destructive testing of composite plates by holographic vibrometry [PDF]

, 2014
We report on a wide-field optical monitoring method for revealing local delaminations in sandwich-type composite plates at video-rate by holographic vibrometry.
Atlan, Michael, Bruno, Francois, Lamboul, Benjamin, Laurent, Jérôme, Passilly, Bruno, Prada, Claire   +5 more
core   +3 more sources

Complete Mode Spectrum Decomposition of Complex‐Structured Light by Computer‐Generated Holography

Advanced Photonics Research, Volume 6, Issue 2, February 2025.
In this article, a new optical method based on self‐interference is proposed to completely decompose the eigenmode spectrum of complex‐structured light. A diffractive optical method is designed and validated to extract the complete information of complex‐structured light fields composed with eigenmode superposition states, including the order of ...
Yunfei Ma, Zilong Zhang, Yuqi Wang, Hongzhi Yang, Wei He, Lingyu Kong, Suyi Zhao, Xiaotian Li, Yetong Hu, Changming Zhao   +9 more
wiley   +1 more source