scholarly journals Full-field spectral-domain optical interferometry for snapshot three-dimensional microscopy

2020 ◽  
Vol 11 (10) ◽  
pp. 5903
Author(s):  
Rishyashring R. Iyer ◽  
Mantas Žurauskas ◽  
Qi Cui ◽  
Liang Gao ◽  
R. Theodore Smith ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Optical Interferometry ◽  
Spectral Domain ◽  
Full Field

VIS-NIR hyperspectral cameras

Photoniques ◽  
2021 ◽  
pp. 58-64
Author(s):  
Stéphane Tisserand
Keyword(s):  
Multispectral Imaging ◽  
Three Dimensional ◽  
Spectral Domain ◽  
Spectral Bands ◽  
Cmos Sensors

Hyperspectral and multispectral imaging can record a single scene across a range of spectral bands. The resulting three-dimensional dataset is called a "hypercube". A spectrum is available for each point of the image. This makes it possible to analyse, quantify or differentiate the elements and materials constituting the scene. This article presents the existing technologies on the market and their main characteristics in the VIS/NIR spectral domain (400-1000 nm). It then focuses on a specific multispectral technology called snapshot multispectral imaging, combining CMOS sensors and pixelated multispectral filters (filtering at the pixel level).

scholarly journals Full-field imaging of thermal and acoustic dynamics in an individual nanostructure using tabletop high harmonic beams

2018 ◽  
Vol 4 (10) ◽  
pp. eaau4295 ◽  
Author(s):  
Robert M. Karl ◽  
Giulia F. Mancini ◽  
Joshua L. Knobloch ◽  
Travis D. Frazer ◽  
Jorge N. Hernandez-Charpak ◽  
...  
Keyword(s):  
Functional Imaging ◽  
Extreme Ultraviolet ◽  
Imaging Techniques ◽  
High Harmonic ◽  
Three Dimensional ◽  
Dynamic Imaging ◽  
Significant Advance ◽  
Grand Challenge ◽  
Diffractive Imaging ◽  
Full Field

Imaging charge, spin, and energy flow in materials is a current grand challenge that is relevant to a host of nanoenhanced systems, including thermoelectric, photovoltaic, electronic, and spin devices. Ultrafast coherent x-ray sources enable functional imaging on nanometer length and femtosecond timescales particularly when combined with advances in coherent imaging techniques. Here, we combine ptychographic coherent diffractive imaging with an extreme ultraviolet high harmonic light source to directly visualize the complex thermal and acoustic response of an individual nanoscale antenna after impulsive heating by a femtosecond laser. We directly image the deformations induced in both the nickel tapered nanoantenna and the silicon substrate and see the lowest-order generalized Lamb wave that is partially confined to a uniform nanoantenna. The resolution achieved—sub–100 nm transverse and 0.5-Å axial spatial resolution, combined with ≈10-fs temporal resolution—represents a significant advance in full-field dynamic imaging capabilities. The tapered nanoantenna is sufficiently complex that a full simulation of the dynamic response would require enormous computational power. We therefore use our data to benchmark approximate models and achieve excellent agreement between theory and experiment. In the future, this work will enable three-dimensional functional imaging of opaque materials and nanostructures that are sufficiently complex that their functional properties cannot be predicted.

Full-Field Three-Dimensional Test for Scratch Defects Using Digital Holographic Scanning Imaging System

2020 ◽  
Vol 47 (4) ◽  
pp. 0409003
Author(s):  
冯方 Feng Fang ◽  
田爱玲 Tian Ailing ◽  
刘丙才 Liu Bingcai ◽  
冯丹青 Feng Danqing ◽  
陈晨 Chen Chen ◽  
...  
Keyword(s):  
Imaging System ◽  
Three Dimensional ◽  
Full Field ◽  
Scanning Imaging
Sign in / Sign up

Export Citation Format

Share Document