Post by thread:[OT] CMOS Terahertz chips for "X-Ray Vision"

www.utdallas.edu/news/2012/4/18-17231_New-Research-Could-Mean-Cellphones-That-Can-See-Th_article-wide.html?WT.mc_id=NewsHomePageCenterColumn "Coming soon" to a future near you? -- http://www.fastmail.fm - Access all of your messages and folders wherever you are

On Fri, Apr 20, 2012 at 1:31 PM, Bob Blick <spam_OUTbobblickTakeThisOuTftml.net> wrote: > > http://www.utdallas.edu/news/2012/4/18-17231_New-Research-Could-Mean-Cellphones-That-Can-See-Th_article-wide.html?WT.mc_id=NewsHomePageCenterColumn > > "Coming soon" to a future near you? > > I wonder if this is a transmit/receive device like radar or if it just has a receiver that receives the THz signals generated by objects of interest sort of like IR viewers. -- Carey Fisher Chief Technical Officer New Communications Solutions, LLC 678-999-3956 .....careyfisherKILLspam@spam@ncsradio.co

There are two fundamental techniques for imaging ; measure the reflected part / measure the absorbed part (reflection/transmission). X-ray is a transmission imaging technique thus it will both transmit and receive in order to construct the image. On Fri, Apr 20, 2012 at 9:27 PM, Carey Fisher <careyfisherKILLspamncsradio.com>wrote: {Quote hidden}> On Fri, Apr 20, 2012 at 1:31 PM, Bob Blick <.....bobblickKILLspam.....ftml.net> wrote: > > > > > > www.utdallas.edu/news/2012/4/18-17231_New-Research-Could-Mean-Cellphones-That-Can-See-Th_article-wide.html?WT.mc_id=NewsHomePageCenterColumn > > > > "Coming soon" to a future near you? > > > > I wonder if this is a transmit/receive device like radar or if it just > has > a receiver that receives the THz signals generated by objects of interest > sort of like IR viewers. > -- > Carey Fisher > Chief Technical Officer > New Communications Solutions, LLC > 678-999-3956 > EraseMEcareyfisherspam_OUTTakeThisOuTncsradio.com >

> There are two fundamental techniques for imaging ; measure the > reflected part / measure the absorbed part (reflection/transmission). Terahertz imaging uses the third one - measure the radiated part. A human body radiates quite a lot of energy in the terahertz region, and it is this energy that proposed full body scanners at airports etc are using to detect people carrying weapons. -- Scanned by iCritical.

Reflectometry based approaches already cover the cases where the object itself is the source of the radiation. On Sat, Apr 21, 2012 at 4:28 PM, <alan.b.pearcespam_OUTstfc.ac.uk> wrote: {Quote hidden}> > There are two fundamental techniques for imaging ; measure the > > reflected part / measure the absorbed part (reflection/transmission). > > Terahertz imaging uses the third one - measure the radiated part. A human > body radiates quite a lot of energy in the terahertz region, and it is this > energy that proposed full body scanners at airports etc are using to detect > people carrying weapons. > > -- > Scanned by iCritical. > >

> Reflectometry based approaches already cover the cases where the object > itself is the source of the radiation. They may "cover the cases" but not needing a TerraHertz source sounds 'useful'. The images that I have seen within the last year of image data that is being used to infer eg firearms being present, were horrendously rough and appeared to have 'signal' nearly buried in noise. Russel

On Sat, Apr 21, 2012 at 6:51 PM, RussellMc <@spam@apptechnzKILLspamgmail.com> wrote: > > Reflectometry based approaches already cover the cases where the object > > itself is the source of the radiation. > > They may "cover the cases" but not needing a TerraHertz source sounds > 'useful'. > It would be useful if they were talking about that ; "Terahertz can also be used for imaging to detect cancer tumors, diagnosing disease through breath analysis, and monitoring air toxicity." Very roughly speaking ; they built an optical detector IC that has acceptable response to the x-ray region of the spectrum. Without a monochromatic X-ray source that is specifically built to operate in sync with the detector IC, it is useless. I know some of you are thinking about the blackbody radiation that is the fundamental phenomena making thermal cameras and etc work but this is different. > > The images that I have seen within the last year of image data that > is being used to infer eg firearms being present, were horrendously > rough and appeared to have 'signal' nearly buried in noise. > > > Russell >