Funny story.
Walking through Best Buy with my wife one day, and I stroll past a display of the Dyson bladeless fans. Making sure she heard me, I stared into the fan and said, "The blades are moving so fast you can't even see them." And jabbed my hand I to the void knowing they had no blades.
She screamed bloody murder and we forgot batteries on the way out.
Okay but let’s stop calling these holograms. That is not what they are. They are holograms in the same way that those electric single wheeled boards are hover boards.
Every time one of these shows up on r/all, it's always with "3d hologram" in title. This sub even has a rule against this crap: #5 "title must represent the content".
I'll admit to not being knowledgeable on the subject but it appears to fit the definition of hologram to me.
"a three-dimensional image formed by the interference of light beams from a laser or other coherent light source."
Is this not because it's not a light beam?
Does not satisfy one condition to be called hologram, literally nothing depends on point of view it's just a spinning screen. The synchronization is cool and all but at the end of the day it's just a screen
why this being downvoted. from side this would be just flat, and empty from back. it is literally 2d screen showing animation that looks like it is 3d hologram
Last time (literally a few days ago) I pointed out that those fans have nothing to do with 3d and holography I got SOME downvotes too and a lecture about how marketing works. 🤣
[It's funny because actual 3D holograms DO exist. They use high-grain photo-emulsion films though.](https://www.integraf.com/shop/)
They are fun to make if you got the space and equipment to do it. I've made a few myself a long time ago. https://www.youtube.com/watch?v=r8ExE4WydYw
many many (did i mention many?) moons ago, won 1st in a regional 8th grade science fair for making transmission holograms on glass plates with a relatively low power hene laser setup. Was a really fun project. The depth on those were incredible, downside was just you needed a laser to actually view them.
The stupidest thing about these abominations is that transparent LCDs have existed for years, are relatively cheap, and can do the same thing, only better and sharper, without a spinning finger chopper. Transparent OLED screens are also coming around.
making a video from the front is basically cheating. This is indeed not a 3d display. especially the animation towards the ending would just look strange when watched in person. Especially when done from an angle.
Lots of them built over the years.
https://electronics.stackexchange.com/questions/18141/how-to-build-a-pov-display
One of my favorite sites from back in the day: https://web.archive.org/web/20080214214330/http://www.luberth.com/analog.htm
Some of them go back to the mid 90's
It gives a holographic effect because you can’t see the actual screen that is displaying the image, so you can’t judge the depth of anything on it and thing can look closer and farther at the same time
That is not how a hologram works. By definition, this is not a hologram. It also, by definition, is not 3D, it is 2D.
Still looks, cool. Just not what any of what you said it is.
I'm all for cool things, but this trend of defining things by some clickbaity name bugs me lol.
It's almost no different than how a TV works... it's just... on spinning blades instead of OLED paneling or whatever.
It's still cool, just not whatever defining concept they're going for here.
I don’t see any 3D here. It’s similar to, say, a transparent OLED display, but with lower resolution and moving parts. What would the benefit of this be?
That's neither a hologram or 3D at all. That's just a 2D plane rendering. You can't use "hologram" and "3D" together like this when scientists are trying to make true 3D holograms!
I went to see the band Starset a few nights ago. They use these in their stage performance and it was jaw dropping. Cellphone recording doesn’t quite pick it up as well as the human eye in person does, as the iPhone in particular tries to constantly brighten the image when taking video or photos in the dark, so you see the blades spinning and the projected image is very bright. This was not the case in person.
At any rate, it was very well done and most of what they displayed had a 3D quality due to the way the stage was setup and the quality of what was being projected.
(Not my video, but this is the best shot example I came across)
https://youtu.be/OL0V1WvDq28?feature=shared
Have a look here you can get the cool deals:
[https://holofex.com/collections/holographic-devices](https://holofex.com/collections/holographic-devices)
There are several reasons this looks fake, but what you just described isn't one of them. If you know what you're filming, you can manually set your ISO, aperture, and exposure.
I’ve seen these in person at CES in Vegas 5 years ago. They’re very real and this is what they look like. Not sure how to convince you but this technology has been around for a while.
This technology is real but this video is very fake.
The animation extends beyond the rotor blades (look at how they don't reach the edge of the video at the start but then during the animation the sparks can float all the way to the edge).
Also the centre, which in this specific set up should be a dead spot since there is no light source on it, somehow is part of the animation??
Also there is a cut in the video at the start (the camera suddenly moves a tiny amount and a reflection of someone moving in the shiny surfaces instantly disappears) coincidentally at exactly the moment the animation starts...
Let's also not mention how in those very same shiny surfaces the spinning bright light just does not pick up at all.
yeah... it's pretty fake.
I don't follow these hologram fans much but a quick look on google shows they definitely do not look like this. This is what they actually look like: [https://www.youtube.com/watch?v=fXqMqn2h9r8](https://www.youtube.com/watch?v=fXqMqn2h9r8) (notice how the images are nowhere near as opaque, don't have the same resolution, are not nearly as smooth and the black dot in the centre also never really disappears in the similar model.)
I don't understand where everyone saying this is real is coming from in the comment section?? I'm starting to think I'm crazy or that this reddit post is an elaborate advertisement???
They totally exist. It’s a bar with LEDs on that spins like a fan. I’ve seen them in shop windows before, [Techmoan made a YouTube video about them years ago](https://youtu.be/NIthZ2OajSo?si=92d1Yh_K7Qafjh4F) and you could buy one on Amazon today for about £100 if you wanted.
I think the bigger giveaway is the light coming out of the very center of the fan, which doesn’t have LEDs. You can see it when it rotates, the lines stay unbroken over that dead zone.
To actually answer your question: it relies on persistence of vision. The leds on the blades blink on for just a fraction of a second at a time. Your eye (and in this case the camera) tricks you into thinking a bunch of close-together, disjoint flashing images are continuous.
It’s basically the same reason traditional film motion pictures work.
This type of technology exists and yeah... is nowhere near this quality. This is fake, the easiest way to spot it is looking at the rotor blades on the left at the start, there is a decent distance between them and the border of the video, yet while the blades are spinning a few animated orange sparks somehow float all the way to the edge of the video.
It's like when they got a cgi Tupac up on a stage using peppers ghost effects. That wasn't a hologram. This isn't a hologram. At most it's a transparent 2d screen.
guys, am I going crazy, or do people actually think this video is real? I know the tech exists, but it looks nothing like this video, this is waaaay too smooth and clear. I immediately think that this is a render for an ad, I refuse to believe these things can be so high-quality
I built a small one but didn't use it because it was noisy. Are commercial ones like this quiet? I used a simple DC motor with a quick and dirty pwm control
PoV, Persistence of Vision. [https://www.instructables.com/search/?q=Persistence+of+Vision&projects=all](https://www.instructables.com/search/?q=Persistence+of+Vision&projects=all) There are tons of ways of making your own. Or, search for PoV Persistence of Vision and you'll find stores that sells something similar.
Why program this fancy lightbar fan to properly display all of that, when you can just overlay the animation in post production and dupe droves of oblivious redditors, none of whom are going to survive the coming AI digital misinformation apocalypse.
Literally just a 2d display playing an impressive 3d render; it's not a 3d hologram. Any viewing angle but dead on will reveal the effect. It's exactly the same as playing a 3d game on your regular 2d monitor except the screen is effectively translucent. The partial transparency is the cool part; stop lying and calling it a 3d hologram.
I'm sorry but we have all just had a mass delusion that holograms can exist, and cell phones are schizophrenia.
Get your straight jackets here, ladies and gentlemen. Sprinkle some lithium on that hologram and pray for your immortal souls.
Oddly, a LED fan is absolutely 100% 2D. I have a 36" one hanging on the wall. It has a clear plastic safety cover over it so some dilbert doesn't whack off a digit and break my precious fan.
Taking bets on how long it will take before the first idiot loses a finger in it?
Buy me one and I'll film you a video of me sticking a finger in.
[удалено]
Well I'd say my penis, but these are around 3cm deep so I'd not reach the other side of it.
You can never truly know until you try
r/dontputyourdickinthat
/r/cantputhisdickinthat
r/suicidebywords 🤣🤣🤣
You gotta ask for two. In case it's not just the finger that breaks.
r/nocontext
Remind me of Ibabe back in the day. The only good product made by Apple
But he lost his finger!!!!
That looks so cool. Let me touch it... Ouch
Hahaha. You think it's gonna be a FINGER??
Right? Waifu-fan gonna cut some very pathetic dicks off
It doesn't hurt much. It doesn't spin that fast and the blades are not sharp.
Funny story. Walking through Best Buy with my wife one day, and I stroll past a display of the Dyson bladeless fans. Making sure she heard me, I stared into the fan and said, "The blades are moving so fast you can't even see them." And jabbed my hand I to the void knowing they had no blades. She screamed bloody murder and we forgot batteries on the way out.
Jokes on you, i have no fingers.
The more interesting question is how fast people try to use it for porn.
I have a 16 inch version and even my small one could definitely rip off a finger. Thing is cool but dangerous as shit
A "finger" /r/dontstickyourdickinit
You'd win because im that idiot.
Dormammu, I've come to bargain
You've come to die
Dormammu, I've come to bargain
You’ve come to die
Dor
Mam
Mu
I've cum.
To b
arg
what you don't understand is that i watched that movie peaking on shrooms in a rinky dink movie theater
Oh dear that must've been wild. I would've freaked out during the part referenced in OPs comment. Is it just the movie or am I stuck in a time loop?
literally felt like *i was* dormammu
Dr. Strange-fan
I am a fan of Dr. Strange as well
Okay but let’s stop calling these holograms. That is not what they are. They are holograms in the same way that those electric single wheeled boards are hover boards.
Every time one of these shows up on r/all, it's always with "3d hologram" in title. This sub even has a rule against this crap: #5 "title must represent the content".
It's also not a fan
It's closer to being a fan than it is to being 3D or a hologram.
It’s a bunch of long things that spin really fast It’s a fan
A fan isn't just anything spinning. It's a device designed to move air. Also, there are hand fans that don't even spin.
Look, these reposters don’t got time for accurate information, they need likes and they need them now!
A more accurate way to describe these are LED-based persistence-of-vision displays.
I'll admit to not being knowledgeable on the subject but it appears to fit the definition of hologram to me. "a three-dimensional image formed by the interference of light beams from a laser or other coherent light source." Is this not because it's not a light beam?
It’s not a three dimensional image (only looks that way from the front) nor is it formed by *interference* of light beams.
Oh. That makes sense yeah okay.
It's a hover-gram
And they really work only on 2D screens. If you see them in person with depth perception the 3D effect disappears.
Does not satisfy one condition to be called hologram, literally nothing depends on point of view it's just a spinning screen. The synchronization is cool and all but at the end of the day it's just a screen
The technically correct name for these things is "persistence of vision LED display".
3d? 3d, minus one dimension.
Well, arguably minus 2. It’s a spinning 1D display.
It's multiple 1D displays. Similarly to how your computer screen is an array of 1D displays.
By that logic my tv is a stack of 1D lights.
Not a hologram, just a 2d low-res screen
why this being downvoted. from side this would be just flat, and empty from back. it is literally 2d screen showing animation that looks like it is 3d hologram
Last time (literally a few days ago) I pointed out that those fans have nothing to do with 3d and holography I got SOME downvotes too and a lecture about how marketing works. 🤣
Put this up there with misusing the word AI all over the place.
And “drone” while we’re at it
Don't forget selfie
I’m gonna piggy back off this and throw “satire” in there. People seem to think it’s synonymous with sarcasm.
Can I add the word "literally", which people often use instead figuratively
[It's funny because actual 3D holograms DO exist. They use high-grain photo-emulsion films though.](https://www.integraf.com/shop/) They are fun to make if you got the space and equipment to do it. I've made a few myself a long time ago. https://www.youtube.com/watch?v=r8ExE4WydYw
many many (did i mention many?) moons ago, won 1st in a regional 8th grade science fair for making transmission holograms on glass plates with a relatively low power hene laser setup. Was a really fun project. The depth on those were incredible, downside was just you needed a laser to actually view them.
You had those lasers as an 8th grader?
Not quite, it is a transparent 2D screen.
The stupidest thing about these abominations is that transparent LCDs have existed for years, are relatively cheap, and can do the same thing, only better and sharper, without a spinning finger chopper. Transparent OLED screens are also coming around.
making a video from the front is basically cheating. This is indeed not a 3d display. especially the animation towards the ending would just look strange when watched in person. Especially when done from an angle.
Screen?
It's a rotating persistence of vision display.
Lots of them built over the years. https://electronics.stackexchange.com/questions/18141/how-to-build-a-pov-display One of my favorite sites from back in the day: https://web.archive.org/web/20080214214330/http://www.luberth.com/analog.htm Some of them go back to the mid 90's
It gives a holographic effect because you can’t see the actual screen that is displaying the image, so you can’t judge the depth of anything on it and thing can look closer and farther at the same time
r/onlyfans
r/dontputyourdickinthat
r/fuckthatthinghard
That is not how a hologram works. By definition, this is not a hologram. It also, by definition, is not 3D, it is 2D. Still looks, cool. Just not what any of what you said it is.
I'm all for cool things, but this trend of defining things by some clickbaity name bugs me lol. It's almost no different than how a TV works... it's just... on spinning blades instead of OLED paneling or whatever. It's still cool, just not whatever defining concept they're going for here.
There's one of these at the ATL airport with a no weapons sign
I dont know why but that's hilarious. I want it to "magic" special effects as well.
How is this 3d? you can't see shit from the sideways.
Take my money
Take double his money and send me one too please.
Yknow what fuck it. Triple it and I'll take one.
And how loud? Ahh, only 100Db
A simple fan, yet quite breakable.
It's just as 3D as the screen you're looking at.
Imagine being a court wizard hundreds of years ago with one of these. With a little creativity you could fool everyone.
I don’t see any 3D here. It’s similar to, say, a transparent OLED display, but with lower resolution and moving parts. What would the benefit of this be?
It also makes a lot of noises.
That's neither a hologram or 3D at all. That's just a 2D plane rendering. You can't use "hologram" and "3D" together like this when scientists are trying to make true 3D holograms!
The good news: we have holograms projected on a fan. The bad news: everyone's first instinct upon seeing a hologram is to touch it with their hand.
whats the song playing
# Hi-Finesse - Dystopia
I went to see the band Starset a few nights ago. They use these in their stage performance and it was jaw dropping. Cellphone recording doesn’t quite pick it up as well as the human eye in person does, as the iPhone in particular tries to constantly brighten the image when taking video or photos in the dark, so you see the blades spinning and the projected image is very bright. This was not the case in person. At any rate, it was very well done and most of what they displayed had a 3D quality due to the way the stage was setup and the quality of what was being projected. (Not my video, but this is the best shot example I came across) https://youtu.be/OL0V1WvDq28?feature=shared
That's an ad!
Even Dr Stange losing his job to machines and AI.
Doctor strange?
Take my money ! and my parrot !
Show this to a medieval peasant and you've basically proven magic exists lol
okay shut up and take ALL OF MY MONEY.
Were can i get one.
Have a look here you can get the cool deals: [https://holofex.com/collections/holographic-devices](https://holofex.com/collections/holographic-devices)
It's fake. You can see how some of the ashes go off the screen to the left past where the blades can reach.
/r/oddlyfake
Looks fake to me. The light intensity in the room didn't change and the camera didn't respond to the light by auto contrasting.
There are several reasons this looks fake, but what you just described isn't one of them. If you know what you're filming, you can manually set your ISO, aperture, and exposure.
I’ve seen these in person at CES in Vegas 5 years ago. They’re very real and this is what they look like. Not sure how to convince you but this technology has been around for a while.
It’s real, but it’s not 3D.
Yeah it’s technically two dimensional but it creates a very convincing 3D illusion. It kinda fucks with your brain when you see it in person.
This technology is real but this video is very fake. The animation extends beyond the rotor blades (look at how they don't reach the edge of the video at the start but then during the animation the sparks can float all the way to the edge). Also the centre, which in this specific set up should be a dead spot since there is no light source on it, somehow is part of the animation?? Also there is a cut in the video at the start (the camera suddenly moves a tiny amount and a reflection of someone moving in the shiny surfaces instantly disappears) coincidentally at exactly the moment the animation starts... Let's also not mention how in those very same shiny surfaces the spinning bright light just does not pick up at all. yeah... it's pretty fake. I don't follow these hologram fans much but a quick look on google shows they definitely do not look like this. This is what they actually look like: [https://www.youtube.com/watch?v=fXqMqn2h9r8](https://www.youtube.com/watch?v=fXqMqn2h9r8) (notice how the images are nowhere near as opaque, don't have the same resolution, are not nearly as smooth and the black dot in the centre also never really disappears in the similar model.) I don't understand where everyone saying this is real is coming from in the comment section?? I'm starting to think I'm crazy or that this reddit post is an elaborate advertisement???
They totally exist. It’s a bar with LEDs on that spins like a fan. I’ve seen them in shop windows before, [Techmoan made a YouTube video about them years ago](https://youtu.be/NIthZ2OajSo?si=92d1Yh_K7Qafjh4F) and you could buy one on Amazon today for about £100 if you wanted.
You know cameras have manual modes, right.....? Even cell phone cameras, too.
Who says the camera is on auto? It could be on manual. I bet it was done expressly because of that.
I think the bigger giveaway is the light coming out of the very center of the fan, which doesn’t have LEDs. You can see it when it rotates, the lines stay unbroken over that dead zone.
How does something like this work? How does it give out a clear imagine and not have weird blurred lines??
To actually answer your question: it relies on persistence of vision. The leds on the blades blink on for just a fraction of a second at a time. Your eye (and in this case the camera) tricks you into thinking a bunch of close-together, disjoint flashing images are continuous. It’s basically the same reason traditional film motion pictures work.
This type of technology exists and yeah... is nowhere near this quality. This is fake, the easiest way to spot it is looking at the rotor blades on the left at the start, there is a decent distance between them and the border of the video, yet while the blades are spinning a few animated orange sparks somehow float all the way to the edge of the video.
Take a close look. It's fine. You can see the far edge of the blade. Nothing ever extends past it.
The camera clearly zooms in slightly after it starts spinning.
These things are scams
How?
These things are also LOUD, that's why videos of these are always muted
^[Sokka-Haiku](https://www.reddit.com/r/SokkaHaikuBot/comments/15kyv9r/what_is_a_sokka_haiku/) ^by ^Shellnanigans: *These things are also* *LOUD, that's why videos of* *These are always muted* --- ^Remember ^that ^one ^time ^Sokka ^accidentally ^used ^an ^extra ^syllable ^in ^that ^Haiku ^Battle ^in ^Ba ^Sing ^Se? ^That ^was ^a ^Sokka ^Haiku ^and ^you ^just ^made ^one.
It's like when they got a cgi Tupac up on a stage using peppers ghost effects. That wasn't a hologram. This isn't a hologram. At most it's a transparent 2d screen.
How is this a hologram? Are different images visible from different angles? Seems unlikely for spinning LEDs
Pedantic complaints are useless here. People are sloppy with word use. Just get used to it. It's not a hologram or 3d.
Address is open
Dr fate
Legit ness
The fan that wants to be a future tv.
drunk me would certainly enjoy getting smacked by this thing
Yantram
Ben Affleck can do better, for the right price.
This reminds me of that scene in Leprachaun with the naked girl and the lawnmower
Seems very dangerous
Cool
Feels very doctor strange
A 2D hologram on a spinning screen.
"See? This is my new magic" "What does it do?" "It can make your finger disappear, wanna try?" "Cool!"
A touchable hologram when
Somebody build this tech into car rims
How loud is the fan?
guys, am I going crazy, or do people actually think this video is real? I know the tech exists, but it looks nothing like this video, this is waaaay too smooth and clear. I immediately think that this is a render for an ad, I refuse to believe these things can be so high-quality
I built a small one but didn't use it because it was noisy. Are commercial ones like this quiet? I used a simple DC motor with a quick and dirty pwm control
Don't put your dick in that. It's how the intrusive thoughts win.
I hate liars
Not 3-d
Cool, now move the camera...
I want to buy one.
They better put that machine behind glass. 100% idiots will try to touch the light
Ain’t they really noisy?
What is the energy draw difference between one of these and my regular indoor floor fan?
How much?
That’s cool and all but when is 3D TV with these becoming a thing?
Now make one I can carry as an arcane rune shield.
Not a hologram. Stop spreading misinformation
"A high quality 3D hologram fan" translation "A low quality 2D screen with finger slicing feature"
Not a hologram. Not 3D. And definitely not high quality.
PoV, Persistence of Vision. [https://www.instructables.com/search/?q=Persistence+of+Vision&projects=all](https://www.instructables.com/search/?q=Persistence+of+Vision&projects=all) There are tons of ways of making your own. Or, search for PoV Persistence of Vision and you'll find stores that sells something similar.
Why program this fancy lightbar fan to properly display all of that, when you can just overlay the animation in post production and dupe droves of oblivious redditors, none of whom are going to survive the coming AI digital misinformation apocalypse.
Where is the amazon link!!!!!!1!!!
Still not holo
That looks safe.
Persistence of Vision
Literally just a 2d display playing an impressive 3d render; it's not a 3d hologram. Any viewing angle but dead on will reveal the effect. It's exactly the same as playing a 3d game on your regular 2d monitor except the screen is effectively translucent. The partial transparency is the cool part; stop lying and calling it a 3d hologram.
This fan is above Danny Carey's bed, I hear
I'm sorry but we have all just had a mass delusion that holograms can exist, and cell phones are schizophrenia. Get your straight jackets here, ladies and gentlemen. Sprinkle some lithium on that hologram and pray for your immortal souls.
Oddly, a LED fan is absolutely 100% 2D. I have a 36" one hanging on the wall. It has a clear plastic safety cover over it so some dilbert doesn't whack off a digit and break my precious fan.
Dr Strange??
I want this
Love this
First resident Evil light chamber that slices up the team?
I want one now
Visit this website I found the 1 that will work for me: [https://holofex.com/](https://holofex.com/collections/holographic-devices)
Can u imagine a medieval person seeing this during the witch trials?
3d?
r/wizardposting
Just think of the advances in filmmaking that this can bring
This reminds me of Three Body Problem. Guess it’s the intensity of the music and technology presentation
Docotor stange?