Difference between revisions of "Rikesh Patel"

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===Journal publications===
 
===Journal publications===
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@Article{Patel2014,  Title                      = {Widefield two laser interferometry},  Author                    = {Rikesh Patel and Samuel Achamfuo-Yeboah and Roger Light and Matt   Clark},  Journal                  = {Opt. Express},  Year                      = {2014},  Month                    = {Nov},  Number                    = {22},  Pages                    = {27094--27101},  Volume                    = {22},  Abstract                = {A novel system has  been  developed that can capture the wide-field interference pattern  generated  by interfering two independent and incoherent laser sources.  The  interferograms are captured using a custom CMOS modulated light camera (MLC) which is capable of demodulating light in the megahertz  region. Two stabilised HeNe lasers were constructed in order to keep  the optical frequency difference (beat frequency) between the beams  within the  operational range of the camera.This system is based on  previously  reported work of an ultrastable heterodyne interferometer  \&\#x0005B;Opt. Express 20, 17722 (2012)\&\#x0005D;. The system  used an electronic feedback system to mix down the heterodyne signal  captured at each pixel on the camera to cancel out the effects of time  varying piston phase changes observed across the array. In this paper, a  similar technique is used to track and negate the effects of beat  frequency variations across the two laser pattern. This technique makes  it possible to capture the full field interferogram caused by  interfering two independent lasers even though the beat frequency is  effectively random.As a demonstration of the system\&\#x02019;s  widefield interferogram capture capability, an image of a phase shifting  object is taken using a very simple two laser interferometer.},  Doi                        = {10.1364/OE.22.027094},  Keywords                  =  {Interferometric imaging ; Interferometric imaging},  Owner                      = {rp},  Publisher                = {OSA},  Timestamp                  = {2014.11.18},  Url                      =   {http://www.opticsexpress.org/abstract.cfm?URI=oe-22-22-27094}, pdf = {   http://optics.eee.nottingham.ac.uk/w/images/4/4d/Pap4.pdf} }
+
@ARTICLE{Patel2011a,  author = {Rikesh Patel and Samuel Achamfuo-Yeboah and Roger Light and Matt Clark},  title = {Widefield heterodyne interferometry using a custom CMOS modulated light camera},  journal = {Opt. Express},  year = {2011},  volume = {19},  pages = {24546--24556},  number = {24},  month = {Nov},  abstract = {In this paper a method of taking widefield heterodyne interferograms using a prototype modulated light camera is described. This custom CMOS modulated light camera (MLC) uses analogue quadrature demodulation at each pixel to output the phase and amplitude of the modulated light as DC voltages. The heterodyne interference fringe patterns are generated using an acousto-optical frequency shifter (AOFS) in an arm of a Mach-Zehnder interferometer. Widefield images of fringe patterns acquired using the prototype MLC are presented. The phase can be measured to an accuracy of {\textpm}6.6{\textdegree}. The added value of this method to acquire widefield images are discussed along with the advantages.},  doi = {10.1364/OE.19.024546},  owner = {rp},  publisher = {OSA},  timestamp = {2012.01.13},  url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-19-24-24546}, pdf = {http://optics.eee.nottingham.ac.uk/w/images/d/d6/Pap1.pdf}}
 
</bibtex>
 
</bibtex>
  
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<bibtex>
 
<bibtex>
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@ARTICLE{Patel2011a,  author = {Rikesh Patel and Samuel Achamfuo-Yeboah and Roger Light and Matt Clark},  title = {Widefield heterodyne interferometry using a custom CMOS modulated light camera},  journal = {Opt. Express},  year = {2011},  volume = {19},  pages = {24546--24556},  number = {24},  month = {Nov}, abstract = {In this paper a method of taking widefield heterodyne interferograms using a prototype modulated light camera is described. This custom CMOS modulated light camera (MLC) uses analogue quadrature demodulation at each pixel to output the phase and amplitude of the modulated light as DC voltages. The heterodyne interference fringe patterns are generated using an acousto-optical frequency shifter (AOFS) in an arm of a Mach-Zehnder interferometer. Widefield images of fringe patterns acquired using the prototype MLC are presented. The phase can be measured to an accuracy of {\textpm}6.6{\textdegree}. The added value of this method to acquire widefield images are discussed along with the advantages.},  doi = {10.1364/OE.19.024546},  owner = {rp},  publisher = {OSA},  timestamp = {2012.01.13},  url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-19-24-24546}, pdf = {http://optics.eee.nottingham.ac.uk/w/images/d/d6/Pap1.pdf}}
+
@Article{Patel2014,  Title                      = {Widefield two laser interferometry},  Author                    = {Rikesh Patel and Samuel Achamfuo-Yeboah and Roger Light and Matt   Clark},  Journal                  = {Opt. Express},  Year                      = {2014},  Month                    = {Nov},  Number                    = {22},  Pages                    = {27094--27101},  Volume                    = {22},  Abstract                = {A novel system has  been  developed that can capture the wide-field interference pattern  generated  by interfering two independent and incoherent laser sources.  The interferograms are captured using a custom CMOS modulated light camera (MLC) which is capable of demodulating light in the megahertz  region. Two stabilised HeNe lasers were constructed in order to keep  the optical frequency difference (beat frequency) between the beams  within the  operational range of the camera.This system is based on  previously  reported work of an ultrastable heterodyne interferometer  \&\#x0005B;Opt. Express 20, 17722 (2012)\&\#x0005D;. The system  used an electronic feedback system to mix down the heterodyne signal  captured at each pixel on the camera to cancel out the effects of time  varying piston phase changes observed across the array. In this paper, a  similar technique is used to track and negate the effects of beat  frequency variations across the two laser pattern. This technique makes  it possible to capture the full field interferogram caused by  interfering two independent lasers even though the beat frequency is  effectively random.As a demonstration of the system\&\#x02019;s  widefield interferogram capture capability, an image of a phase shifting  object is taken using a very simple two laser interferometer.},  Doi                        = {10.1364/OE.22.027094},  Keywords                  =  {Interferometric imaging ; Interferometric imaging},  Owner                      = {rp},  Publisher                = {OSA},  Timestamp                  = {2014.11.18},  Url                      =   {http://www.opticsexpress.org/abstract.cfm?URI=oe-22-22-27094}, pdf = {   http://optics.eee.nottingham.ac.uk/w/images/4/4d/Pap4.pdf} }
 
</bibtex>
 
</bibtex>
  

Revision as of 15:59, 23 March 2017

Rikesh Patel

Location

202/307 Tower, University Park

C38 SIOS Pharmacy, University Park

Phone

+44 (0)115 84-67892

Email

rikesh.patelAtnotts.png

Education/Posts

2004-2008 MEng Electronic and Computer Engineering (1st Class), University of Nottingham

2008-2014 PhD Electrical and Electronic Engineering (Thesis), University of Nottingham

2013-2014 Research Assistant, University of Nottingham

2014- Research Associate, University of Nottingham

Awards

  • University of Nottingham interdisciplinary research funding award (UNICAS) - 2014
  • Applied optics group internal research proposal review award (1st place) - 2015

Journal publications

Rikesh Patel, Samuel Achamfuo-Yeboah, Roger Light, Matt Clark - Widefield heterodyne interferometry using a custom CMOS modulated light camera
Opt. Express 19(24):24546--24556, Nov 2011
http://www.opticsexpress.org/abstract.cfm?URI=oe-19-24-24546
Bibtex
Author : Rikesh Patel, Samuel Achamfuo-Yeboah, Roger Light, Matt Clark
Title : Widefield heterodyne interferometry using a custom CMOS modulated light camera
In : Opt. Express -
Address :
Date : Nov 2011

Rikesh Patel, Matt Clark, Samuel Achamfuo-Yeboah - Widefield ultrastable heterodyne interferometry using a custom CMOS modulated light camera
Imaging and Applied Optics pp. JWA14,2011
http://www.osapublishing.org/abstract.cfm?URI=AIO-2011-JWA14
Bibtex
Author : Rikesh Patel, Matt Clark, Samuel Achamfuo-Yeboah
Title : Widefield ultrastable heterodyne interferometry using a custom CMOS modulated light camera
In : Imaging and Applied Optics -
Address :
Date : 2011

Rikesh Patel, Samuel Achamfuo-Yeboah, Roger Light, Matt Clark - Ultrastable heterodyne interferometer system using a CMOS modulated light camera
Opt. Express 20(16):17722--17733, Jul 2012
http://www.opticsexpress.org/abstract.cfm?URI=oe-20-16-17722
Bibtex
Author : Rikesh Patel, Samuel Achamfuo-Yeboah, Roger Light, Matt Clark
Title : Ultrastable heterodyne interferometer system using a CMOS modulated light camera
In : Opt. Express -
Address :
Date : Jul 2012

Rikesh Patel, Samuel Achamfuo-Yeboah, Roger Light, Matt Clark - Widefield two laser interferometry
Opt. Express 22(22):27094--27101, Nov 2014
http://www.opticsexpress.org/abstract.cfm?URI=oe-22-22-27094
Bibtex
Author : Rikesh Patel, Samuel Achamfuo-Yeboah, Roger Light, Matt Clark
Title : Widefield two laser interferometry
In : Opt. Express -
Address :
Date : Nov 2014

Richard J. Smith, Matthias Hirsch, Rikesh Patel, Wenqi Li, Adam T. Clare, Steve D. Sharples - Spatially resolved acoustic spectroscopy for selective laser melting
Journal of Materials Processing Technology 236:93 - 102,2016
http://www.sciencedirect.com/science/article/pii/S0924013616301352
Bibtex
Author : Richard J. Smith, Matthias Hirsch, Rikesh Patel, Wenqi Li, Adam T. Clare, Steve D. Sharples
Title : Spatially resolved acoustic spectroscopy for selective laser melting
In : Journal of Materials Processing Technology -
Address :
Date : 2016

Matthias Hirsch, Rikesh Patel, Wenqi Li, Guangying Guan, Richard K. Leach, Steve D. Sharples, Adam T. Clare - Assessing the capability of in-situ nondestructive analysis during layer based additive manufacture
Additive Manufacturing 13:135 - 142,2017
http://www.sciencedirect.com/science/article/pii/S2214860416301877
Bibtex
Author : Matthias Hirsch, Rikesh Patel, Wenqi Li, Guangying Guan, Richard K. Leach, Steve D. Sharples, Adam T. Clare
Title : Assessing the capability of in-situ nondestructive analysis during layer based additive manufacture
In : Additive Manufacturing -
Address :
Date : 2017

Conferences

  • UON Institute of Aerospace exposition, Nottingham UK - 2010
  • KTP innovate event, London UK - 2011
  • OSA Optics and Photonics Congress, Toronto Canada - 2011
  • IOP Photon12, Durham UK - 2012
  • IOP Anglo-French physical acoustic conference AFPAC2015, Frejus France - 2015
  • BINDT Aerospace event 2015, Sheffield UK - 2015
  • RCNDE Annual research review, Manchester UK - 2015
  • 4th International Symposium on Laser Ultrasonics LU2015, Evanston IL USA - 2015
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