A Real Invisibility Shield | How Does It Work? 

Hi everyone, if you're new to my channel my name is Ben. I read all of your comments and reply to as many as I can. While you're here you may be interested in some of my other videos, like this one where I re-invent a lost supermaterial 'Starlite': ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-aqR4_UoBIzY.html Or maybe this video where I speak with a retired aerospace engineer that has turned his expertise toward making incredible backyard rollercoasters: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SsrfBxWYxOQ.html How about running a gasoline engine on firewood? I've got a video on that too: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-522BaxM0Jnk.html Thanks for stopping by! Leave me some comments. I'd love to hear from you.

Can it hide all my problems in life?

“He’s using invisible technology, we can’t find him” Tilts head 90 degrees Ah there he is

My shower door's been doing pretty much the same for 30+ years

Soldier: They cant see me, Im a blur Enemies: Sir! there's a huge ass Blur square moving from left to right.

invisibility has already been invented, we just can't see it

I figured there was a reason there always seemed to be some sort of parallel lines in the background of those clips

So I decided to check out some of your older videos, and surprised to see that you’ve been making such great content for longer than 10 years. I think it’s incredible that still today you’re continuing to find inspiration for random (but interesting) things so frequently!

This lens used in toys too changing characters or image based on where you look or angle.

This just proves my theory that magic users in the past were just highly scientific people who figured out how to use the elements to their advantage

Excellent as always. I could see a couple arguing, then one holds up a sheet and says, "Great, now I don't have to look at you!". 😂

When a grid's misaligned with another behind, that's a Moiré!

This might sound stupid but in my head it works like the smudge tool on Photoshop when im trying to delete something from the image

When I first saw the videos of the "magical invisibility shields", it didn't take long before I noticed they always used backgrounds with horizontal features... And I figured the "shield" only worked horizontally.

Love how clear and concise you are, thank you very much!

I have a few of these invisibility cards. It’s so cool to play with them and see with what items and in which situations they work the best

You can also find these lenses in the back light path in LCD screens

This dude looks 40 and 12 years old at the same time.

It makes it even more fascinating now that it’s been explained, it’s absolutely amazing

Fascinating! Thank you for the explanations!

I was always curious how this illusion worked, thank you for sharing. These videos are always so well done and I absolutely love watching them!

The REAL magic trick in this video is how he got the pliers to remain standing on the table after he removed the wooden support sticks. But seriously, nice video about the optics of a fresnel lens! I also learned that all these years I've been pronouncing fresnel wrong. (it's fray-NEL and not FREZ-nel)

That was really cool. First time I heard of and saw this lens demonstrated. Thanks 👍

i love how i have one of these for lenticular prints nearby and never knew of this trick. trying now it's working a charm!

Knowing that the pliers are there, I can see the reddish hue of the handles. If I didn't know they were there, I'd probably be blown away! Always look forward to your videos my friend. Always worth the wait! God bless.

I've only seen this video by this creator and can already tell that he's a jewel of a human being. Very well done content, explained in a way that anyone can understand. Good jerb!

I've heard of this elsewhere but I found your explanation on point

I remember these from the late 90’s CD covers and promo posters. A photoshop app slices two images to give the illusion of motion or transition to something else when the lens is applied.

It's just a real life rectangle of content aware fill

I was once shown A great way to explain how these work. Lenticular lenses use a similar property as Fresnel lenses. A curved surface, glass or plastic, will bend light. Or more generally, light bends at the interface between to optical materials, Air and water, air and glass, air and plastic. This is how magnifying glasses, and camera lenses work. a typical camera lens is curved on one side and flat on the other. The bending occurs at the surface of the curve. any bulk between the flat part of the lens and the curved part is not necessary for the lensing effect. So if you slice a lens, in this case horizontally, into thin slices, you can remove all the material between the curved part and the flat part, then put them all the remaining parts back together. now you have a lens that has the same optical properties as the original bulky curved piece of glass/plastic, but in a nice, easy to manufacture, uniform width. This effect scales to very large, and very small, and also works with horizontal slices, vertical slices, circles (Fresnel), waves, random slices. This process can also be conducted on a prism, which could be thought of as a lens, only with flat surfaces. A prism bends light. Lenticular lenses can be thught of as the "flattening" of a prism in the same way a fresnel lens "flattens" a curved magnifying glass. This makes a lot of sense if you have a drawing of a magnifying lens from a side on view, act as an illustration.

It just seems like it's a massive horizontal blur, which tends to hide things because foreground elements like people tend to be vertical while landscape elements like hills and lakes tend to be horizontal.

After seeing it on Daily dose of internet i was wondering how it works you explained it well 😊

It's been too long. Super happy you're back

If you were my science teacher in high school I might have gone into science. Really enjoyed your presentation

Thanks buddy you always give a practical and real world approach and explanation on what you do and breakdown, keep up the amazing work

Hi Ben, you explained that so I could understand how that works. Not being a Physics person I had wondered about the material when I saw a guy making an invisibility shield in another video. But when you did yours with the pliers it worked better. So is smaller better in this respect.

I remember people using larger ones similar to these to put in front of the TV to get a 'bigger' picture, back in the 70's

I feel this could have applications in the marine environment.

Also used to create a type of changing image often used on toys or children's book covers. Held one way over a specially printed image, you see the first image, moved slightly and you see a second or even a 3rd image.

Flipping awesome man!!! Thank you so much for sharing! I'm really looking into that!

And our next act on Penn and Teller's Fool Us...

I could see these used in office vitrines, you just have to put a striped pattern on the back wall and boom, everyone inside is invisible

Hi Ben. Newbie to your antics , just found you. . I have had several attempts at using the Ferrell lens with a led back light , by taking away the lcd screen (usually cracked making the tv useless) and using the left over parts to create what some people can’t understand as a 3D void affect , the sheets in using are regular tv sized. Also remove the leds from the tv as the voltage to run them are horrendous, and replace with 12v rgbw. They also make for an excellent daylight in dark corners of your home / hallway / staircase. And cheaper to run than a normal household bulb. Looking forward to more of your antics experiments funny thing 👍

Great demonstration and explanation. Thanks

So impressive, that I bought two of them before the video was ended 😂 Thanks 👍

Thank you for pronouncing 'Fresnel' correctly. 👍

They put these lenses on the backs of school buses I had growing up. It was awesome because the driver really could see all the way down the isle into the fresnel lens and it would show pretty much everything behind the bus. It was a spherical fresnel lens that produced a fisheye effect, not one of these fancy Lubors lenses. I can see how this material could be useful to see around corners in a variety of applications

Nice content dude, thank you for the information you gave

Where can you find large versions of it? Like big enough to recreate the riot shield?

I am a photonics student, so I worked out how it worked in the first 5 seconds. xD

Just a simple thank you for your explanation. It's nice to learn something new

Although I’ve only watched a dozen of your videos,your instructions,narration,and filming are clear,concise,and highly professional.You would be an asset to worldwide producers i.e. National Geographic,BBC,etc..

Alternate title: How to break the lighting engine | Glitch Showcase

I accidentally printed one of these on my 3d printer. I was printing with some clear PETG in the process of designing a lamp diffuser. With the 0.2mm lines running horizontally from each print layer, it made a single axis vertical diffuser. Nowhere near the same image quality, but thats fine for a diffuser.

Thanks for sharing the knowledge man!! I appreciate it heaps! So good to see a guy whos not just trying to show off and 'mind-blown' everybody!

This is very similar to how a cylinder lens (used to correct astigmatism) works. It refracts light in one direction but not the other. Like if you're looking through a clear water-filled bottle, you would see vertical objects behind the bottle relatively clearly, but horizontal objects appear very blurred.

Well I'm disappointed. I placed one over my credit card... Still have debt. 😔

Is this the same kind of tech that's used in that new ford "no trailer" backup cameras? Probably not, but I need to know how that works too!

I can feel the noise its making as hes rubbing the lens against each other. We used to have a tv like that and my family would also mess with me by scratching the tv with their nails. It literally sends shivers down my spine and i dont know why lol

Great explanation. Love your videos

My father left to buy a ludor lens. I'm still waiting for him. Sometimes I hear him though.

I know that could hide the object however some could see the blurry object in the distance

Thank you for the education on these lenses.

old RVs used a fresnal lens to shrink the background and see more behind the Rv through a small window. One is in my 85 allegro gmc

The Moore Ray effect can also make you feel eel

Problem is, you also can't see the enemy from behind it.

I noticed a really neat effect while I was playing with a 12in x 8in fresnel lens the other day. While I was trying to focus light from a lamp in my house at night onto the wall, I noticed at just the right angle and distance from the wall, it actually projected an inverted image of the room onto the wall. When I got it just right, the detail was really well defined, even though the image itself was only maybe 3in x 2in, it was just like looking at a little upside down picture. It was well defined enough that from 20 feet I could make out things like a light switch on the wall, or a wooden display case with everything in it, and even some 3in figures I had sitting on top of the case. It was so neat, I couldn't stop playing with it. When I tried doing it in a darkened room with the light from my TV. Focusing the light from my TV onto the wall. It projected a perfect image of whatever was on the TV onto the wall. And even the RGB LEDs in my computer next to the TV. Albeit much smaller and again, upside down. It even worked with a little 1in x 2in fresnel lens magnifying glass I had. Although not as well as the larger one. I'd definitely recommend trying this if you have one lying around your house. I picked up my 12in x 8in one at a surplus store being sold as a magnifier for reading. It's just a wobbly piece of plastic, so it's hard to keep it still. So I plan on building a wooden frame from it. You could probably buy one on Amazon or something. It's not quite strong enough to melt rocks with. But I did burn a nice sized black mark into my kitchen table with sunlight coming through the trees and into the window. lol

Excellent presentation thanks.

There are two of them - one vertical, one horizontal, in most LCD screens.

Guy: *Demonstrates item* Guy: Now let me demonstrate item.

AWESOMEEEEE! Thanks for always sharing cool quality videos! They are great :)

Great video. You are a great teacher. Thank you. Frsnel lens is a great simile. LUDOR lens

You can get big versions of those Lubor's lenses out of LCD TVs, though don't expect to be able to rob a bank with them... :P

First, Amazing video as always. Does the effect require that the thing you want to dissapear to be at a specific or optimal distance? Also since it's a prism based thing, does the type of lighting affect it? Would it still function if the light source was a single color?

Excellent explanation. Thanks!

Who else can’t wait for each new video. Love your channel man.

I was hoping his only explanation would be “it’s just magic” but no.

The real trick is how the pliers stayed standing up after removing the wood dowels that was holding them up!

Great explanation! Thorough but concise.

Great job! Love it!

I want a genetically modified fish that has fernell lens for scales

Almost looks like horizontal and vertical polarization, which is how modern 3D movies work.

PHEW! I’m glad it was just an invisibility cloak thingie... For a second there I thought that you’d lost a perfectly good set of pliers! Another very thought inspiring topic! Thank you!

What a nice guy. Thanks for the video.

I literally saw this thing in China when I was 11... Sometimes I feel like internet hypes everything up, no matter how old they are... And people go APESHIT over it... I really need to find something other than internet as my news source...

we had that crap on are books at school like 6 years ago

Very professional video, nice job.

Holy crap I haven't seen your videos in years I'm so glad to see you again

It’s a cool effect but this use of it has severely limited applications. I don’t see how the police or military could use this effectively outside of fixed defenses in bases or cities. I’m sure that this weird phenomenon will eventually find a use, but it will probably in a totally unexpected way.

Who else watching this through a late 90’s tv and just see a bunch of lines? 😂

Thanks Ben, your video was interesting and I enjoy it, Regards from Argentina

Hai Ben,I like your channel full of educational knowledge.Tyvm.

The Romulans would like to have a word with you...

Is this in any way related to privacy smartphone display protectors?

Made Simple and well explained.

Awesome. Thanks for the great explanation. :)

Last time I was this early we still hadn't seen your face.

Ha ha ha. I knew it was just a variation of a Fresnel lens.

We use fresnel tape in ophthalmology for people who have strabismus or neurological disorders that causes them to have double vision (diplopia). On a side note, the headlight projectors on my Infiniti G37 also use fresnel lenses.

This principal is used with a micro flat to check for minute variations in flatness of a surface using a monochromatic light source.