Browsing by Advisor "Vasu, R M"
Now showing items 1-13 of 13
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Design and Development of Non-intrusive Optical Probes for Quantitative Analysis of Flow Fields in Hypersonic Shock Tunnels
This thesis describes the development of light-based, non-interfering interrogation tools for quantitative assessment of density variations in hypersonic flows over the test models of interest in aerodynamics. Since flow ... -
Design, Fabrication And Testing Of A Versatile And Low-Cost Diffuse Optical Tomographic Imaging System
(2009-06-16)This thesis reports the work done towards design and fabrication of a versatile and low cost, frequency domain DOT (Diffuse Optical Tomography) Imager. A design which uses only a single fiber for the source and a single ... -
A Digital Auto Correlation Spectrometer For Solar Burst Obsevations At Decameter Wavelengths
(Indian Institute of Science, 2006-02-27)This thesis reports the design, construction, and the initial results obtained from a digital spectrograph for observations of radio burst emission from the Sun. One of the distinct advantages of radio spectral studies of ... -
Mathematical And Numerical Studies On The Inverse Problems Associated With Propagation Of Field Correlation Through A Scattering Object
(2011-05-23)This thesis discusses the inverse problem associated with the propagation of field autocorrelation of light through a highly scattering object like tissue. In the first part of the thesis we consider the mathematical issues ... -
Non-invasive Elastic Property Recovery of Tissue and Tissue-Like Objects from Ultrasound Excited Resonant Modes
This thesis is on non-invasive elastic property measurement of tissue or tissue-mimicking materials through vibro-acoustography and ultrasound assisted diffusing wave spectroscopy (UA-DWS). Towards this, a known force is ... -
Novel Diffraction Based Deflection Profiling For Microcantilever Sensor Technology
(2015-02-04)A novel optical diffraction based technique is proposed and demonstrated to measure deflections of the order of ~1nm in microcantilevers (MC) designed for sensing ultra-small forces of stress. The proposed method ... -
Optical Diffraction Tomography for the Refractive Index Profiling of Objects with Large Space-Bandwidth product
(2018-05-25)The primary goal of this work is to arrive at direction tomography (DT) algorithms freed from the severe linearization in the formulation, and as-assumptions on variation of the refractive index distribution (RID), involved ... -
Ultrasound Assisted Optical Elastography For Measurement Of Mechanical Properties Of Soft Tissue Mimicking Phantoms
(2009-03-03)This work describes the development of an optical probe for measuring movement of tissue particles deep inside which are loaded by an ultrasound remote palpation device. The principle of the method is that ultrasound force ... -
Ultrasound-Assisted Diffuse Correlation Spectroscopy : Recovery of Local Dynamics and Mechanical Properties in Soft Condensed Matter Materials
(2017-11-14)This thesis describes the development and applications of an extension of DWS which enables the recovery of ‘localized’ mechanical properties, in a specified region of a complex jelly-like object which is inhomogeneous, ...