MMW/THz imaging using upconversion to visible, based on glow discharge detector array and CCD camera

Avihai Aharon, Daniel Rozban, Amir Abramovich, Yitzhak Yitzhaky, Natan S. Kopeika

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

An inexpensive upconverting MMW/THz imaging method is suggested here. The method is based on glow discharge detector (GDD) and silicon photodiode or simple CCD/CMOS camera. The GDD was previously found to be an excellent room-Temperature MMW radiation detector by measuring its electrical current. The GDD is very inexpensive and it is advantageous due to its wide dynamic range, broad spectral range, room temperature operation, immunity to high power radiation, and more. An upconversion method is demonstrated here, which is based on measuring the visual light emitting from the GDD rather than its electrical current. The experimental setup simulates a setup that composed of a GDD array, MMW source, and a basic CCD/CMOS camera. The visual light emitting from the GDD array is directed to the CCD/CMOS camera and the change in the GDD light is measured using image processing algorithms. The combination of CMOS camera and GDD focal plane arrays can yield a faster, more sensitive, and very inexpensive MMW/THz camera, eliminating the complexity of the electronic circuits and the internal electronic noise of the GDD. Furthermore, three dimensional imaging systems based on scanning prohibited real time operation of such imaging systems. This is easily solved and is economically feasible using a GDD array. This array will enable us to acquire information on distance and magnitude from all the GDD pixels in the array simultaneously. The 3D image can be obtained using methods like frequency modulation continuous wave (FMCW) direct chirp modulation, and measuring the time of flight (TOF).

Original languageEnglish
Title of host publicationCounterterrorism, Crime Fighting, Forensics, and Surveillance Technologies
EditorsYitzhak Yitzhaky, Robert James Stokes, Henri Bouma, Felicity Carlysle-Davies
PublisherSPIE
ISBN (Electronic)9781510613461
DOIs
StatePublished - 1 Jan 2017
EventCounterterrorism, Crime Fighting, Forensics, and Surveillance Technologies 2017 - Warsaw, Poland
Duration: 11 Sep 201712 Sep 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10441
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceCounterterrorism, Crime Fighting, Forensics, and Surveillance Technologies 2017
Country/TerritoryPoland
CityWarsaw
Period11/09/1712/09/17

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