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Single-photon LiDAR delivers detailed 3D images at distances up to 1 kilometer

⁨379⁩ ⁨likes⁩

Submitted ⁨⁨1⁩ ⁨day⁩ ago⁩ by ⁨ploot@lemmy.blahaj.zone⁩ to ⁨technology@lemmy.world⁩

https://phys.org/news/2025-02-photon-lidar-3d-images-distances.html

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Comments

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  • underwire212@lemm.ee ⁨38⁩ ⁨minutes⁩ ago

    I thought that was Chris Pratt for a second. And wondering why we wanted a lidar enhanced photo of Chris Pratt’s face from a kilometer away.

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  • GhostlyPixel@lemmy.world ⁨1⁩ ⁨day⁩ ago

    Really cool, but really scary, all I see is facial biometrics from 1 km away.

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    • werefreeatlast@lemmy.world ⁨21⁩ ⁨hours⁩ ago

      Hello sir, I’m an not from the government and would like to show you something off in the distance for about 3 seconds if you will. Step forward where I’ve carefully marked the street with blue painter’s tape. Do not smile. Did you see it? No? Good!. Well what it is, its ah… Don’t worry about it. Good day sir. What are you talking about? I asked you to step where? I did no such thing. I’m just a normal person living in the city.

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  • gerryflap@feddit.nl ⁨1⁩ ⁨day⁩ ago

    Cool, but less cool when I remember what dark shit this kind of technology can be used for

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    • jjagaimo@sh.itjust.works ⁨23⁩ ⁨hours⁩ ago

      *will be used for

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    • OrderedChaos@lemmy.world ⁨15⁩ ⁨hours⁩ ago

      They probably already have something better than this otherwise it would have been relaxed publicly.

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  • LovableSidekick@lemmy.world ⁨15⁩ ⁨hours⁩ ago

    Modern tech makes it hard for me to take science fiction seriously anymore that involves humans piloting space fighters, manually aiming weapons, or even being effective on battlefields. We’re rapidly reaching a point where warfare will be strictly the realm of machines.

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    • PalmTreeIsBestTree@lemmy.world ⁨12⁩ ⁨hours⁩ ago

      Terminator becoming more and more reality every year.

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  • RobotToaster@mander.xyz ⁨1⁩ ⁨day⁩ ago

    superconducting nanowire single-photon detector

    Don’t suppose they sell those on aliexpress yet?

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    • rtxn@lemmy.world ⁨1⁩ ⁨day⁩ ago

      I bet Styropyro has a box of them tucked away somewhere. His laser defense turrets will have unmatched accuracy.

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      • kernelle@0d.gs ⁨23⁩ ⁨hours⁩ ago

        Hey YouTube, today we’re testing this photon detector I found browsing ebay that was sold by some friendly russians. It’s been collecting dust for 10 years but due to some recent developments it’s as relevant as ever! Now I’ll be able to see the feds coming from miles away!

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    • jj4211@lemmy.world ⁨1⁩ ⁨day⁩ ago

      I’m sure that in in 2025 those are available in every corner drug store

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    • apprehensively_human@lemmy.ca ⁨20⁩ ⁨hours⁩ ago

      Do they compete with the 1500 megawatt aperture science heavy duty super-colliding super button?

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    • Imgonnatrythis@sh.itjust.works ⁨1⁩ ⁨day⁩ ago

      I wouldn’t be surprised at all

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  • Fizz@lemmy.nz ⁨20⁩ ⁨hours⁩ ago

    that level of detail at 1km is insane. We are so fucked in the machine war.

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  • sugar_in_your_tea@sh.itjust.works ⁨20⁩ ⁨hours⁩ ago

    Imagine what they could do with two photons.

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    • noobface@lemmy.world ⁨18⁩ ⁨hours⁩ ago

      Or even phivetons.

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  • einlander@lemmy.world ⁨1⁩ ⁨day⁩ ago

    But Elon thinks camera vision is enough to drive a car.

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    • Yprum@lemmy.world ⁨1⁩ ⁨day⁩ ago

      Well, not to side with the fascist shithead, but you know, “broken clock…”. The thing is, camera vision is kinda enough… It’s an entirely different thing if it could be better, improved, safer, or whatever by adding LiDAR or other tech…

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      • Brunbrun6766@lemmy.world ⁨22⁩ ⁨hours⁩ ago

        Brother it HAD LiDAR, they took it away. Tesla customers now pay more for a worse car

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      • chunkystyles@sopuli.xyz ⁨12⁩ ⁨hours⁩ ago

        Despite all of the evidence to the contrary, you chose to be confidently incorrect about this?

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  • drosophila@lemmy.blahaj.zone ⁨17⁩ ⁨hours⁩ ago

    So, keep in mind that single photon sensors have been around for awhile, in the form of avalanche photodiodes and photomultiplier tubes. And avalanche photodiodes are pretty commonly used in LiDAR systems already.

    The ones talked about in that article collect about 50 points per square meter at a horizontal resolution of about 23 cm. Obviously that’s way worse than what’s presented in the phys.org article, but that’s also measuring from 3km away while covering an area of 700 square km per hour (because these systems are used for wide area terrain scanning from airplanes). With the way LiDAR works the system in the phys.org article could be scanning with a very narrow beam to get way more datapoints per square meter.

    Now, this doesn’t mean that the system is useless crap or whatever. It could be that the superconducting nanowire sensor they’re using let’s them measure the arrival time much more precisely than normal LiDAR systems, which would give them much better depth resolution. Or it could be that the sensor has much less noise (false photon detections) than the commonly used avalanche diodes. I didn’t read the actual paper, and honestly I don’t know enough about LiDAR and photon detectors to really be able to compare those.

    But I do know enough to say that the range and single-photon capability of this system aren’t really the special parts of it, if it’s special at all.

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  • PagingDoctorLove@lemmy.world ⁨16⁩ ⁨hours⁩ ago

    So, more ways to surveil us? Cool cool cool.

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  • werefreeatlast@lemmy.world ⁨21⁩ ⁨hours⁩ ago

    Only.

    …1kilometer only.

    Or 1km so far.

    Yeah this is crazy stuff.

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  • thatradomguy@lemmy.world ⁨16⁩ ⁨hours⁩ ago

    100 bucks says someone will try and use this on their genitals within the year.

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    • CH3DD4R_G0BL1N@sh.itjust.works ⁨13⁩ ⁨hours⁩ ago

      I doubt you’ll find a rube to take that bet.

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  • finitebanjo@lemmy.world ⁨17⁩ ⁨hours⁩ ago

    I love LiDAR, there was very limited terrain data from LiDAR available on USGS about a decade ago, just a couple of counties was all, but it was so detailed you could see the shape of Cars on the streets with it.

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  • Melatonin@lemmy.dbzer0.com ⁨20⁩ ⁨hours⁩ ago

    Umm, y’all, this is serious.

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    • JasonDJ@lemmy.zip ⁨19⁩ ⁨hours⁩ ago

      These scientists got a chill with the AI and surveillance tech and work on making a refillable toothpaste tube ffs.

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