Holograms and how they work.

[@christophclear1438]

Here we are, watching this on our holographic hover cellphones from the future!

[@spindoctor6385]

Damn, you are watching this much later than me.

[@l1l1l1]

@@spindoctor6385 Im using my holographic hover cellphone while driving my flying car

[@musthavechannel5262]

I'm watching this 40 years old program while an idiot is trying to run train in vacuum tube inspired by a 60 years old idea.

[@BriarLeaf00]

Hey we actually got 3D TVs! They were just met with a big ol shrug. Oh well I guess we'll have to settle for 8k. Also, I'm pretty sure if you showed a 4k movie to someone from the 80s they'd think you were from the future. Which you would be!

[@LetsMars]

Those were outlawed decades ago

[@FokkeWulfe]

I'm 32. I'm fairly well versed in tech for an ameture level of interest, and I'm fairly well versed in tech from far before my time and I *still* learn new things from watching a program that hasn't been on air in nearly 30 years. 3,2,1 Contact, Curiosity Show, Mr. Goodbody, and many others, need to come back. Thank you Rob and Dean.

[@CuriosityShow]

Many thanks for those kind words - Rob

[@Zzudwa]

Inquiring Minds also was brilliant

[@KRAFTWERK2K6]

As a kid these Laser Holograms (Holography) always fascinated me, how you could get a 3D image on a flat surface, without any glasses. The Movie "Logan's Run" even used these in one scene and brought the attention of people around the world on this type of fascinating technology. There is still a lot of hidden potential in this type of technology :)

[@JustWasted3HoursHere]

"There...is....no....sanctuary!"

[@wrtlpfmpf]

There are now early experiments for making holograms with DLP chips like they are used in projectors. The big problem is that you'd need an imager that is as large as the "window" you want to have. It would have to have a resolution in the low micrometer range. This is currently infeasible.

[@dewfall56]

I looked at Logan’s Run again a couple of years back, and realized how cheesy that scene was. If you watch closely, you can make out the holographic film, how it wraps around into a cylinder shape and where the two sides meet, and that allows you to see the film rotating for the speaking effect. Back then it was amazing I suppose.

[@JustWasted3HoursHere]

@@dewfall56 For sure at the time it was stupendously amazing. As for seeing the seam that gives the trick away, have a look at the carousel scene: wires visible all over the place. Still an enjoyable movie though and *radically* different from the book. They have only about 10% in common with each other. I actually prefer the movie over the book to be honest.

[@dewfall56]

@@JustWasted3HoursHere I was and still am impressed by the carousel. That was quite a feat to design, build and coordinate, worthy of a world-class magician.

[@JustWasted3HoursHere]

The other thing about laser holograms is that you can look around and behind objects in the scene, which blows my mind. And this is weird: if you make a laser hologram of a magnifying glass it will act just like one even though the glass it's printed on is completely flat.

[@hogarthheathan]

Sounds impossible, very interesting tho. Please post some links to interesting hologram videos if you for any

[@JustWasted3HoursHere]

@@hogarthheathan Check this out! kzbin.info/www/bejne/iWXZnqKni81rfNU

[@BoomShard17]

Where can we go to learn more about seeing around a hologram?

[@JustWasted3HoursHere]

@@BoomShard17 There used to be a science museum in Tampa Florida many years ago that had very large holograms on display (something like 3 feet by 6 feet in size) that were some of the most impressive I've ever seen in terms of size AND quality. I had no idea they were there when I went but I was transfixed when I saw them and scoped them out for hours. As far as where to go for more info, I imagine KZbin or the internet at large is a good place to start.

[@BoomShard17]

@@JustWasted3HoursHere That sounds really cool, do you remember the name of the museum?

[@joelpaprocki85]

As a biophysicist who works with lasers every day, I love how elegantly he describes this! Fantastic!

[@Maninawig]

Oh wow. Did not know about the glass part. For the first time since I learned about holograms as a kid, I can understand how someone could view the effect of "flexible glass" like ascetate and the way lazers read CDs to draw the conclusion of holographic video. Doesn't seem so implausible.

[@spindoctor6385]

Wow this episode stood the test of time. Did you guys ever do a segment about interference patterns ?

[@WhuDhat]

Wow that ending segment was really interesting. How is the image still whole even on a miniscule fragment?

[@jj_1edzep]

Was wondering the same thing

[@CadillacDriver]

Yeah that's something he needed to elaborate on.

[@arfansthename]

since a laser beam is quite small itself, i believe the actual picture on the plate itself is really minuscule which is why the whole image is visible while only being lit from a single laser beam

[@grimmonolith]

A hologram captures different perspectives or angles of the object at once. Think of it like a window consisting of different segments. Or a door with multiple keyholes. Through each segment/keyhole you can see the whole scenery outside, but you see it from a different perspective or angle, depending through which segment or keyhole you look. So when you break a hologram, the different parts show the whole object but from a different perspective/angle.

[@TheKnobCalledTone.]

Gotta love how 3D TV sets have been and gone lol

[@craiglessels5384]

"we're gonna hear a lot more about holograms in the future" Enter project Bluebeam 🤣

[@gavinvalentino1313]

I still have my teen-years National Geographic Magazine (c'mon, every person on the planet knows why adolescent boys subscribed to Nat'l Geo mags) from *March 1984,* with an in-depth look at lasers & holography. MOST amazing: *it had a real hologram on the cover,* which was a huuuuge deal back then, especially with me having recently discovered the mind-opening pleasures of marijuanderful experiences (thanks to an immense induction to the skunksmoke at my first Rush concert). The hologram is the same one that ended up as a security feature on a major credit card or two, Visa & M/C I think, for a llllong time and maybe even still now. If you enjoyed this video, the March '84 issue is well worth the $5-$7 they pop up for on eBay. Even the car ads & clothing styles are worth that much, for the fantastic ride down Memory Lane. And the feel of real magazine paper! Speaking of great altered states of brain, I respect this guy entirely for the monster joint at 3:16.

[@smadaf]

If I remember right, there were two issues of National Geographic around that time that had holograms on their front covers. One was of a human skull. The other I'll have to dig out to remember what it was-maybe something spacey?

[@dewfall56]

I love how they showed a laser being aim at someone’s eye for surgery, when all the advice is to never point a laser at someone’s eye. Yes, yes I know it’s different in that case. I got my eyes fixed with lasik surgery, so I was in exactly the position the guy in the picture was in, and it terrified me.

[@MattsInTheBelfry]

The most impressive still hologram I saw was a giant microscope you could look into.

[@chisel83]

36 years later and all I have is damn oled

[@MajkaSrajka]

@@ChaosSwissroIl TVs serve almost no purpose anyway :P

[@E_y_a_l]

If all you have is a damn oled and you want the same(and better) holographic effect then buy a damn 3D Display with stereoscopic 3D capability like the ones that exist for over 20 years.

[@chisel83]

@@E_y_a_l lighten up Mary…

[@E_y_a_l]

@@chisel83 You first

[@michaelkeller5008]

well, 36 years ago, we'd have done great with holographic TV. but with todays TV-program, ... seriously, there's not one technology to be invented within the next 1000 years to make THIS program bearable...

[@camerondrew9402]

For those of you here for the actual title 2:41

[@Aikisbest]

I didnt actually know that thing about it not mattering if the hologram thing is broken, that it will still show the whole picture (or I forgot about it in any case).

[@Cahos_Rahne_Veloza]

Laser pointers are also great for making kitty cats happy 😎

[@anaryl]

It doesn't. They don't understand it's a laser or why they can't grab it and it can cause mental instability in cats. Don't do this - it's actually tormenting them. One would hope you have a better reading of your cats emotions than thinking their distress is "happiness"; most people do this because they think it's amusing, not because the cat does. Don't torture animals.

[@S2DIOfficial]

I had the HTC Evo 3D phone back in 2012. My friend got it, and showed me a video on YoUtube of a sword being pointed towards you, and I was in awe... "3D without glasses?!" Yup. Eventually with my phone, the battery swelled and everything went bad. Then 3D TV's came and went, for whatever reason. I have a feeling that they were doing trials with 3D media, and now they're mastering it for an even bigger release. The "Metaverse" that this Zuckerberg clown is creating pretty much says it all. I think 3D is gonna come back bigger and better than ever pretty soon (which could be either good or bad).

[@brandonstephens1447]

The exit songs bring me back to my childhood.

[@tomchristmas]

I’m rather intrigued by these recent set of clips from “Mind’s Eye”. Now, I grew up watching the Curiosity Show in Australia, but I have zero recollection of Mind’s Eye. Was this a show that screened on television in Australia - or any other country for that matter? Or were one or more pilot episodes produced, but were never put to air? Or were Channel Nine silly enough to air it against the incumbent Beyond 2000 - another beloved science show I grew up with - on Tuesday nights, thereby condemning it to obscurity? Would love to know more about its production and broadcast history!

[@ABW941]

Do you still know the cost of the laser pen, when this segment was recorded? Since laser pointers are very cheap today i wonder hiw much the price has changed over the years.

[@xuanyuzhu6779]

The infringement pattern is that big?! I thought in order to make a hologram you need films of resolution much finer than a regular photo film, and objects cannot move by half a wavelength during exposure. I'm a little confused.

[@Apostate_ofmind]

they had so much hope for the future...

[@RationalSaneThinker]

The puzzle was way too vague because there weren't enough constraints. My simple solution was to simply cut a strip off the edge and then use it to cover or fill the hole. You end up with a rectangular rug with no holes. Where's my half of the king's wealth???👑

[@naboriamoonmama7650]

I was curious what a silicon chip was.. turns out it is an Australian Electronics Magazine that was started in 1987 😎

[@ExploringNew1]

0:35 RIP

[@Eduardo_Espinoza]

I can totally see this working in real life 👁️‍🗨️

[@Eragon954]

Wow! that is still very impressive. It's a shame we're not watching from holographic displays yet.

[@HandyFox333]

One of these days the boys will give us a video on wifi in the 80s.

[@Handelsbilanzdefizit]

By making a hologram of a second hologram, you can achieve, that the object "floats" in front of the plate.

[@chriskaser3445]

Cool happy new year all =)

[@Drew791]

I would love a holographic television set!! I’m still convinced the future of gaming will be a whole room of projected 3D images allowing the player to “interact” with the environment instead of having to wear a VR headset. Or something along those lines.

[@CadillacDriver]

It'll definitely happen, it's just a matter of time.

[@BoomShard17]

How are we able to see the full image on just a fragment of the material?

[@smadaf]

Go look it up!

[@grimmonolith]

A hologram captures different perspectives or angles of the object at once. Think of it like a window consisting of different segments. Or a door with multiple keyholes. Through each segment/keyhole you can see the whole scenery outside, but you see it from a different perspective or angle, depending through which segment or keyhole you look. So when you break a hologram, the different parts show the whole object but from a different perspective/angle.

[@BoomShard17]

@@grimmonolith Oh wow, thanks for the response. So with this being said, would that mean a hologram captures a seemingly infinite amount of perspectives?

[@grimmonolith]

@@BoomShard17 basically yes, although it is limited by the size of the holographic plate the hologram is captured on. So you do not get every perspective possible, but every perspective possible within the captured angle. And technically this is still an infinite amount of perspectives.

[@qwertythekid2688]

Who else is in 2022 watching this in the corner on their 3 dimensional holographic television set?

[@-.._.-_...-_.._-..__..._.-.-.-]

Pretty cool

[@SmoothCanoes]

What year did this episode air on TV?

[@CuriosityShow]

Early 1980s I think - Rob

[@michaelkeller5008]

when did this clip air the first time?

[@benji274]

Might be 1987 or 1988 - Deane still has his moustache

[@roccpro5021]

How to get te picture out of hte glass?

[@noway5096]

more cheef chief

[@idjles]

Was that first half filmed at Flinders University?

[@CuriosityShow]

It could well have been - my uni for many years and I am still attached there - Rob

[@electronwave4551]

Talking about holograms, today there is a hypothesis that 3 dimensional space may be a holographic projection, encoded on a 2 dimensional (mem)brane at the boundary of the observable Universe. Wooha!

[@JohnLeePettimoreIII]

I'm still waiting for the obligatory flying car I was promised 50 years ago. 🤨

[@brownky3]

It's not a trick, it's an illusion Michael!

[@balaam_7087]

So in a movie like, say, Empire Strikes Back when Vader talks to the Emperor’s floating holographic head-is that hypothetically using the same technique the guy went over here? Because in movies there’s never a glass plate, there’s only ever the floating 3 dimensional holographic image. Is that pure sci fi and can’t exist in the real world, or is there truth to that depiction of a hologram and it’s using this same basic technique?

[@MattsInTheBelfry]

It's a composite of two separate shots.

[@janglestick]

as far as Ive seen you always need a projection and a medium or background. So you could do something like that badly into a cloud of smoke. However in recent years at MIT they came up with a way that you only need the background and a projection, but each person viewing can have their own perspective on the image, which is pretty neat.

[@timthetoolpool]

How do laser temperature gauges work?

[@CadillacDriver]

Clear safety glasses in a laser room... Wow.

[@MileyonDisney]

c o o l

[@mce_AU]

Try it on your laser focused friends.

[@janglestick]

How They Work perhaps should be dropped unless there is at least minimal discussion of interference patterns. MIT developed a method of projection holography with multiple perspectives, a couple years ago.

[@droelieboelie3269]

this is creation

[@SergioCastillo87]

Here we are Not watching this on our non existent holographic tv sets! Nor transporting ourselves in our non existent flying cars, we have been lied to, where is our promised future?

[@ellessandraramsay1841]

Put your hand up if you're watching this on your holographic television 🖐 😂

[@SaturnCanuck]

Where is my holographic TV?

[@tinderbox218]

Yeah that never happened. Neither did the flying cars we were all promised.

[@jasc1893]

Is that...Uncle Rico...?

[@RationalSaneThinker]

1:01 What's a compact disk player?👴

[@benji274]

Ah, I recognise Flinders University there.

[@CuriosityShow]

Clever. I am still a professor there - Rob

[@sazitch]

Alexa, add to basket

[@sarsaparila]

20 minutes later

[@liquidgargoyle8316]

love the show but this video title is missleading. better title : "holograms and their properties"

[@thecafcl8409]

Second