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"Invisibility Cloak" invented!

  • 14-06-2004 10:53pm
    #1
    Banned (with Prison Access) Posts: 5,154 ✭✭✭


    Hi Folks,
    A guy called Susumu Tachi has invented an "Invisibility cloak" using some new material, using beads of some description.
    There are 6 small vidoes of this material on his site, which are absolutely amazing to watch.
    WELL worth a look. Although really kinda freaky at the same time.

    link


    oc-okugai.jpg

    xv-s.gif

    oc2-s.jpg

    Enjoy.
    S.


Comments

  • Registered Users, Registered Users 2 Posts: 9,036 ✭✭✭mad m


    A mate of mine had a pic of a C.I.A agent with a clock on and he blended in with background.... something like u said it reflects whatever is behind it,i thought it was a skit or hoax


  • Registered Users, Registered Users 2 Posts: 1,766 ✭✭✭robbie1876


    That is pretty cool. The video of the traffic moving in the background and the one in front of the plasma screen are pretty cool. Although he really should learn how to dance....

    I can see technology becoming a busker's best friend.


  • Closed Accounts Posts: 1,313 ✭✭✭bus77


    Thats a fairly basic princible tbh, but it must have takin a fair bit of work to get the projected light to only show up on the object and no where else.


  • Closed Accounts Posts: 1,669 ✭✭✭DMT


    This is a one year old hoax.


  • Closed Accounts Posts: 2,726 ✭✭✭quank


    I think I saw something about this on Blue Peter around a year ago or something... if I remember correctly anyway.


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  • Registered Users, Registered Users 2 Posts: 68,190 ✭✭✭✭seamus


    Originally posted by DMT
    This is a one year old hoax.
    It's not a hoax. It's not an actual material which provides invisibilty, rather a combination of elements which create the illusion of something being transparent. Fairly simple idea, but quite difficult to pull of in real life.

    The US and UK militaries are apparently looking into this as a valid type of camoflage. Even if they can create the illusion of 25-50% transparency, stationary troops and vehicles would be almost invisible to enemy aircraft and distant snipers.

    Ultimately the entire system would need to function independently. That is, a fabric made up of thousands of pieces of material which can both project and receive visual data (or a checkered pattern of thousands of tiny alternating receiving and projecting pieces). Pieces would have to work in pairs, with the pairs on opposite sides of the person/vehicle. So each in the pair is transmitting what the other is receiving. A monumental task.


  • Registered Users, Registered Users 2 Posts: 2,719 ✭✭✭ARGINITE


    very ghost in a shell like where can i get my hands on some of this stuff : )


  • Registered Users, Registered Users 2 Posts: 1,168 ✭✭✭deadduck


    if thats for real, its ****ing amazing


  • Banned (with Prison Access) Posts: 5,154 ✭✭✭Oriel


    It's not a hoax at all. Look at the root of the guy's website. He's a leading Hi-tech inventor. He has a PhD and this is just one of his "research" projects. Been on the BBC website etc.

    Link No hoax.

    S.


  • Registered Users, Registered Users 2 Posts: 2,680 ✭✭✭Tellox


    If it were for real, how come not a person on the street glanced at him when he was half invisble?


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  • Registered Users, Registered Users 2 Posts: 678 ✭✭✭briano


    Pieces would have to work in pairs, with the pairs on opposite sides of the person/vehicle. So each in the pair is transmitting what the other is receiving

    Thats grand if the person is directly in front of the item with the material on it. Surely though if they looked at an object from off to the side it wouldn't appear right.

    That said, the video of the street is pretty cool.


  • Registered Users, Registered Users 2 Posts: 68,190 ✭✭✭✭seamus


    Originally posted by briano
    Thats grand if the person is directly in front of the item with the material on it. Surely though if they looked at an object from off to the side it wouldn't appear right.
    Well it would, because no matter what angle you look at it from, the picture being displayed to you is from the other side of the material, that's the point in the pairs.
    It's far from perfect, for example, once the fabric creases, it becomes visible again, but it would give some degree of camoflage over the whole garment.


  • Closed Accounts Posts: 1,414 ✭✭✭LoneGunM@n


    That's some crazy sh!t ... have to be on the look out for creases appearing as if from nowhere :D


  • Closed Accounts Posts: 8,880 ✭✭✭Raphael


    How come in one video you could see his skeleton, other times you could see through him??


  • Registered Users, Registered Users 2 Posts: 68,190 ✭✭✭✭seamus


    Originally posted by Raphael
    How come in one video you could see his skeleton, other times you could see through him??
    It's only a demonstration. You weren't actually seeing his skeleton, rather a projection of a skeleton, which only appeared on whatever material the board was made of.


  • Registered Users, Registered Users 2 Posts: 529 ✭✭✭Ebonyks


    OK thats the dogs cajones! But if the material works in pairs, one side receiving and the other transmitting, then whats happening in the mirror video. He's placed the material where the mirror should be, but the other side is the wood frame. How is that working?

    [EDIT] Actually on closer inspection of the material on site, doesn't matter, not quite as sci-fi as I first thought :P

    http://projects.star.t.u-tokyo.ac.jp/projects/MEDIA/xv/Brochure-e.pdf


  • Closed Accounts Posts: 8,880 ✭✭✭Raphael


    Originally posted by seamus
    It's only a demonstration. You weren't actually seeing his skeleton, rather a projection of a skeleton, which only appeared on whatever material the board was made of.

    In that case, its pretty fraudulent(sp?)


  • Closed Accounts Posts: 1,313 ✭✭✭bus77


    Originally posted by Ebonyks
    OK thats the dogs cajones! But if the material works in pairs, one side receiving and the other transmitting, then whats happening in the mirror video. He's placed the material where the mirror should be, but the other side is the wood frame. How is that working?

    No, you mixed up what the Japs did and what seamus was saying about a true invisability cloak.

    The Japs just used external cameras and projectors.

    If you wanted true invisability you'd need the cameras and projectors inside the object.


  • Registered Users, Registered Users 2 Posts: 68,190 ✭✭✭✭seamus


    Originally posted by Ebonyks
    OK thats the dogs cajones! But if the material works in pairs, one side receiving and the other transmitting, then whats happening in the mirror video. He's placed the material where the mirror should be, but the other side is the wood frame. How is that
    What I was talking about was a different way of accomplishing the same thing. They way they're doing it is having a camera directly behind him, linked to a projector which is projecting the image directly towards him, creating the illusion of transparency. Essentially - they're actually using mirrors to bounce light about, so the camera/projector aren't *directly* in from or behind him.
    In order for it to be a viable military solution, a garment or vehicle would need to be completely self-contained. An enemy wouldn't have much trouble spotting someone with a camera behind him and a projector in front of him!

    :)


  • Registered Users, Registered Users 2 Posts: 322 ✭✭Kobie


    Definitely a hoax.


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  • Closed Accounts Posts: 1,313 ✭✭✭bus77


    Originally posted by Kobie
    Definitely a hoax.

    What makes you think that?


  • Posts: 3,620 ✭✭✭ [Deleted User]


    Hi Folks,
    A guy called Susumu Tachi has invented an "Invisibility cloak" using some new material, using beads of some description.

    You have just blatently robbed that story from slashdot and pawned it off as your own discovery.


    Shenanegans!


  • Registered Users, Registered Users 2 Posts: 322 ✭✭Kobie


    I find it harder to comprehend how people in this day and age take things on t.v. at face value.

    It's a basic blue screen trick - the same one that made Superman fly. He holds an object of a particular colour & afterwards they superimpose an image of whatever they want onto that object.

    How can a material that's invisible show you what's inside his head? These are two entirely different concepts - X-Rays don't make you invisible, do they?


  • Banned (with Prison Access) Posts: 23,555 ✭✭✭✭Sir Digby Chicken Caesar


    you are a stupid child are you not


  • Registered Users, Registered Users 2 Posts: 68,190 ✭✭✭✭seamus


    Originally posted by Kobie
    I find it harder to comprehend how people in this day and age take things on t.v. at face value.

    It's a basic blue screen trick - the same one that made Superman fly. He holds an object of a particular colour & afterwards they superimpose an image of whatever they want onto that object.

    How can a material that's invisible show you what's inside his head? These are two entirely different concepts - X-Rays don't make you invisible, do they?
    You have just completely ignored everything that everyone has posted, not bothered to read the website, and gone and posted what you thought, haven't you?


  • Banned (with Prison Access) Posts: 23,555 ✭✭✭✭Sir Digby Chicken Caesar


    seamus.. tomayto


  • Registered Users, Registered Users 2 Posts: 322 ✭✭Kobie


    OK, just followed Ronoc's Slashdot link. Scroll down & you'll find this:


    I saw the cloak demonstrated last month and talked to the U. of Tokyo people who were showing it and I have to tell you: this is about the lamest thing ever.

    THERE IS NO TECHNOLOGY THERE AT ALL!

    It's a grey cloak. That's it. A grey cloak. You look at it, and it's a grey cloak. Nothing special at all. But no, "please look at the video monitor!"

    Oh, in the video monitor the cloak is sorta transparent. Why? Because they're doing an absolutely standard compositing effect IN THE VIDEO MONITOR.

    The cloak is NOT transparent. It's just a piece of blue screen and they composite the background on it. But only if you look at a video monitor. In real life, the cloak is entirely opaque and it's just a grey cloak.

    I asked the professor how long it would be before they had a real working prototype and he said "Maybe 20 years."

    In other words, they have nothing. Just a concept. And it's not even a new concept. It's an old science fiction concept.

    There is nothing to see here. It's just PR and a very standard old-hat video effect.


  • Closed Accounts Posts: 1,313 ✭✭✭bus77


    Originally posted by Kobie
    I find it harder to comprehend how people in this day and age take things on t.v. at face value.

    It's a basic blue screen trick - the same one that made Superman fly. He holds an object of a particular colour & afterwards they superimpose an image of whatever they want onto that object.

    How can a material that's invisible show you what's inside his head? These are two entirely different concepts - X-Rays don't make you invisible, do they?

    Yeah, but the japanese guys didnt claim it was anything more than a projection trick.
    It was only Sinecure that put the name "Invisability Cloak" on it.


  • Registered Users, Registered Users 2 Posts: 529 ✭✭✭Ebonyks


    I think most of us have grasped the wrong end of stick here with regards to this Susumu Tachi thing. This PDF should clear things up.

    The kind of technology advance we're dreaming of is way off! It also helps if you read up on it a bit before making an opinion based on a few fancy pics and vids (as I've learned :p )


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  • Posts: 3,620 ✭✭✭ [Deleted User]


    +5 Insightful

    :p


  • Registered Users, Registered Users 2 Posts: 529 ✭✭✭Ebonyks


    That must have been d4mn insightful...so late in the game too...my work is done here.

    Queue: Ebonyks dissappearing into the mist ;)


  • Banned (with Prison Access) Posts: 5,154 ✭✭✭Oriel


    Originally posted by ronoc
    You have just blatently robbed that story from slashdot and pawned it off as your own discovery.

    Actually, it was the bbc website that I "robbed" - the one that I linked to, sbove. I looked up the guy's name online, found his website and linked to it.

    Might I add I put "Invisibility Cloak" in apostropes - hence not to be taken literally. As did the BBC.

    The defence rests its case.

    S.


  • Registered Users, Registered Users 2 Posts: 9,036 ✭✭✭mad m


    The guys on this thread saying he robbed this and its a blue screen trick get a grip lads,its just a thread and a bit of news for gods sake,i thought it was good so dont make a whole incident out of it.....

    @Sinecure
    thanks for bringing an interesting thread to my eyes anyway.....


  • Registered Users, Registered Users 2 Posts: 7,840 ✭✭✭Calibos


    Here is a post I prepared earlier.


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