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"Specifically, the hidden camera [...] reflects the incoming laser pulses at a higher intensity than its surroundings due to an effect called lens-sensor retro-
by raldi 5y ago
"Specifically, the hidden camera [...] reflects the incoming laser pulses
at a higher intensity than its surroundings due to an effect called
lens-sensor retro-reflection. This occurs when almost all light energy
impacting an object is reflected directly back to the source"
- polishdude20 5y agoGiven this, can you just hold up a flashlight right next to your head and look around the room for bright spots?
- frizensami 5y agoThis is actually one of the recommended methods if you have no other options. It's not particularly good otherwise because of the limited visibility cone of the hidden camera reflections. From experience, the flashlight often tends to occlude the reflections you want to see, or the user isn't in the right place to see the reflections (near the flashlight).
- gpt5 5y agoThat's exactly how detection tools work today. Here is a random one: https://www.lexuma.com/products/lexuma-xscan-portable-hidden-camera-detector https://www.lexuma.com/products/lexuma-xscan-portable-hidden...
- xipho 5y agoLikely. Headlamps are well known tools for collecting spiders at night, when positioned just right they will reflect off the spider's eyes as you move your head around. It's an amazing thing to see spiders everywhere.
- lapetitejort 5y agoFor peace of mind that sounds like the worst tool to use.
- mensetmanusman 5y agoStarted looking for hidden cameras, ended cowering in fear from the thousands of eyes in the closet.
- krapp 5y agoThe ones smart enough to remain unseen are the ones you should worry about.
- Eelongate 5y agoJust try to remember the spiders protect you from the other bugs.
- lotsofpulp 5y agoSame with house centipedes!
- samstave 5y agohOUSE rIVER mONSTERS? Anyone???? House Atredies? I sense the Emperor behind it.
- hungryforcodes 5y agoNo thanks. I'll take my army of friendly neighborhood geckos instead.
- brokenmachine 5y agoThanks for giving me nightmares.
- BLKNSLVR 5y agoCan vouch for this having heard the theory and tried the "torch at eye-level" method and been able to zero-in on small spiders from a distance of about 5m. It's quite amazingly effective, especially the first time, when you're not really convinced.
- gorgoiler 5y agoIt is the standard way of detecting concealed lenses. Random google result: https://www.pimall.com/nais/startfinder.html https://www.pimall.com/nais/startfinder.html
- joelkesler 5y agoThat was actually pretty interesting. Here is a video of the device in use: https://www.youtube.com/watch?v=1x3aDW8ghaY https://www.youtube.com/watch?v=1x3aDW8ghaY I am not sure if it is worth the price, but it's cheaper than a top of the line smartphone with a time-of-flight sensor
- frizensami 5y agoAgreed, and a very valid point that these off the shelf detectors are pretty cheap compared to ToF smartphones. There are a number of unfavourable things about the detectors though: - No automated detection, so lots of human subjectiveness on whether a bright spot should be investigated - Background lighting can be an issue, so the view through the detector can be filled with bright reflections - When I tried this for longer than 30 seconds, there's really some eye strain involved The idea is that the smartphone has more than this one purpose, and the detection system can improve with software updates, whereas you get what you see with the detector and nothing more.
- rtkwe 5y agoThe light returns pretty directly to the source which is why most devices designed to use that detection method have the illuminators around an eyepiece so there's less distance between the illuminators and your eye.
- pasker 5y agoI remember we were spotting alligators at the Amazon river with flashlight and their eyes reflections :-)
- deleted 5y ago[deleted]