I've been thinking about that too for the past couple minutes - in theory an optical scanner can analyze reflected light even at a distance if the spectrum emitted is so specific that it can be identified in the optical noise of the surrounding light sources.
Plus you'd have to take into account how light travels out through the lens again after bouncing off the sensor. In theory it would be returned at the exact same angle. But then there is microlenses on sensors and all sorts of voodoo in between. Plus you'd have to know the absorption spectrum of a DSLR sensor - in fact you'd have to have a market overview - and then your system would identify a sensor whenever its light came back minus that spectrum. If we know for example there are IR filters in front of a sensor, no IR should come back and so on. It would have to be an extreme piece of high tech with many many fast moving light emitters and - at least logically, i.e. field of reception - synchronously moving receivers. If the system reads out your data fast enough and your emitter moves slow enough and on a narrow enough grid, you can just have your emitter fire the pulse on the next pass of the scan. I think it can be done but costs a fortune to make. So I think maybe he does maybe he doesn't. What I still fail to understand is why anyone would care to see pictures of him. Especially blurry shots of a modestly chested dame on his sun deck - I can get better than that anywhere on the internet ... ]=) Cheers Ecke 2009/9/24 Anthony Farr <[email protected]>: > What emanation from a CCD could this device possibly detect, and are > MOS sensors detected as well? > > I suspect this falls into the same category as Britain's infamous "TV > detector vans", IOW a piece of fictional pseudo-tech intended to scare > off the gullible. > > If is is genuine tech, the chance of it catching a DSLR's sensor > during its brief uncovered instant would be slim. > > regards, Anthony > > "Of what use is lens and light > to those who lack in mind and sight" > (Anon) > > > > 2009/9/24 Feroze <[email protected]>: >> http://www.wired.com/gadgetlab/2009/09/russian-billionaire-installs-anti-photo-shield-on-giant-yacht/ >> >> >> ...Ambramovich has installed an anti-paparazzi “shield”. Lasers sweep the >> surroundings and when they detect a CCD, they fire a bolt of light right at >> the camera to obliterate any photograph.... >> >> >> Wouldn't the mirror bounce the laser back??? >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
