Experimental method to enhance sensitivity and accuracy of measurements in measuring fracture parameters around the crack tip using compact hololens imaging …

AA Khan, HL Yadav, RK Jaiswal - Russian Journal of Nondestructive …, 2023 - Springer
In the present communication, a detailed investigation has been made to realize a compact
four hololens imaging system for the precision measurement of fracture parameters. The …

Analysis of double aperture hololens imaging system through simulation and experimentation for its application in speckle metrology

AA Khan, HL Yadav - Optics and Lasers in Engineering, 2022 - Elsevier
In-plane displacement measurement using Double exposure Speckle photography involves
illumination of a rough surface by coherent source of light and formation of image of the …

Speckle photography and double aperture speckle interferometry using both sides of a suitably designed hololens imaging configuration

R Mandal, A Ghosh, AK Nirala - Laser Physics, 2023 - iopscience.iop.org
In the present work, both sides of a suitably designed hololens imaging configuration have
been used in laser speckle photography and double aperture speckle interferometry. A …

Segmentation of shallow scratches image using an improved multi-scale line detection approach

X Jiang, X Yang, Z Ying, L Zhang, J Pan… - Multimedia Tools and …, 2019 - Springer
Along with develo** modern technology, the demands for optical element surface develop
towards the characteristics of large scale and high precision. However, it is challenging to …

Design and fabrication of different types of holographic lenses, with analysis of their imagery and aberration

A Ghosh, AK Nirala - Measurement Science and Technology, 2017 - iopscience.iop.org
In this communication we have experimentally investigated and realized the following for the
first time to the best of our information: two new types of hololenses; three compact two …

Experimental assessment of a low-cost aberration-free compact double aperture four-hololens imaging system: application to the enhancement of sensitivity and …

AA Khan, HL Yadav - Applied Optics, 2024 - opg.optica.org
In this work, an experimental analysis of hololens imaging configuration consisting of four<?
TeX 2pc 0pt?> holographic lenses has been carried out to realize Duffy's double aperture …

In-Plane Displacement Component Measurement Using Fourier Transform Filtering Technique

A Ghosh, R Kumar, N Kumar, AK Nirala - ICOL-2019: Proceedings of the …, 2021 - Springer
In present work, a Fourier transform filtering technique has been proposed and developed in
speckle interferometry for obtaining sharply focused, noise (speckle) free Young's fringes …

[CITAZIONE][C] Single hololens imaging configuration in laser speckle photography for in-plane displacement measurement

A Ghosh, N Kumar, AK Nirala - Asian Journal of …, 2022 - asianjournalofphysics.com
In the present work, a single hololens imaging configuration has been proposed and
developed in speckle photography for measurement of in-plane displacement. It's alignment …

[CITAZIONE][C] Design and Analysis of Coherent Imaging System Using Holographic Lenses for Speckle Metrology

G GOYAL - 2017