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#Post#: 8330-------------------------------------------------- |
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New invisibility cloak device can hide almost anything |
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By: SangueG Date: September 29, 2014, 10:37 am |
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New invisibility cloak device can hide almost anything |
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http://www.foxnews.com/tech/2014/09/29/new-invisibility-cloak-device-can-hide-a… |
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*New cache ideas forming* But will wait till the cost comes down |
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a bit ;D |
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#Post#: 8332-------------------------------------------------- |
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Re: New invisibility cloak device can hide almost anything |
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By: Griff Grof Date: September 29, 2014, 2:48 pm |
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Wow, that's incredible! |
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I can't see how it could be used with a cache though - maybe my |
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creative cap isn't on :D |
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Now, imagine one which SHOWS things you can't see - that'd work |
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for a cache too! ;) |
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Thanks for sharing! :) |
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#Post#: 8336-------------------------------------------------- |
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Re: New invisibility cloak device can hide almost anything |
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By: walktall Date: September 29, 2014, 3:58 pm |
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The basic four lens version, you need a gap in the central spot |
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for it to work or the item your hiding, doesn't cross the |
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central spot |
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[quote]To build your own Rochester Cloak, follow these simple |
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steps: |
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http://www.rochester.edu/newscenter/wp-content/uploads/2014/09/lens-diagram-630… |
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For their demonstration cloak, the researchers used 50mm |
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achromatic doublets with focal lengths f1 = 200mm and f2 = 75mm |
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[list type=decimal] |
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[li] Purchase 2 sets of 2 lenses with different focal lengths f1 |
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and f2 (4 lenses total, 2 with f1 focal length, and 2 with f2 |
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focal length)[/li] |
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[li] Separate the first 2 lenses by the sum of their focal |
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lengths (So f1 lens is the first lens, f2 is the 2nd lens, and |
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they are separated by t1= f1+ f2).[/li] |
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[li] Do the same in Step 2 for the other two lenses.[/li] |
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[li] Separate the two sets by t2=2 f2 (f1+ f2) / (f1� f2) apart, |
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so that the two f2 lenses are t2 apart.[/li] |
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[/list] |
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NOTES: |
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[list] |
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[li] Achromatic lenses provide best image quality.[/li] |
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[li] Fresnel lenses can be used to reduce the total length |
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(2t1+t2)[/li] |
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[li] Smaller total length should reduce edge effects and |
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increase the range of angles.[/li] |
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[li] For an easier, but less ideal, cloak, you can try the 3 |
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lens cloak in the paper.[/li] |
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[/list] |
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A patent has been filed for this cloaking device.[/quote] |
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https://www.youtube.com/watch?v=oJb9RnAVDuE |
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How it was done: |
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https://www.youtube.com/watch?annotation_id=annotation_775088&feature=iv&src_vi… |
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