How are holograms possible?

Comments · 5.6K

• 3B

  @3blue1brown · 1 year ago (edited) · pinned

  This was a joy to make! If you liked it, you might enjoy other optics videos I did, like the one on why light &quot;slows down&quot; in glass: <a href="https://www.youtube.com/watch?v=KTzGBJPuJwM">https://youtu.be/KTzGBJPuJwM</a><br><br>Especially big thanks to Craig Newswanger and Sally Weber for helping us actually produce the hologram shown here.<br><br>After producing this, it was fun to receive a number of messages from people within the small but vibrant holography community. It&apos;s not an easy space to make a living in, and while usually I decline promotional material in these videos and pinned comments, I thought I&apos;d pass along a few messages from people running small businesses in the space.<br><br>Walter Spierings from the Dutch Holographic Laboratory, the person behind the microscope hologram featured at the beginning, wanted me to let you know that anyone should feel free to approach them when it comes to producing professional holograms.<br><br>Paul Christie runs LitiHolo, which produces kits people can use to make their own holograms.<br><br>For anyone looking to purchase a hologram, Peter Scheir runs a small shop and offered this link: <a href="https://hologramplace.com/?ref=3Blue1Brown1">https://hologramplace.com/?ref=3Blue1Brown1</a>

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• JE

  @JessieDye-i2h · 1 year ago (edited)

  Whos here because you saw a short and this video was mentioned, &nbsp;so you sighed inwardly thinking &quot;Well, down this hole i go&quot; 😂<br><br>4k later, i love that yall love learning some new stuff that is Totally beyond imagination. &nbsp;This is amazing work, and yall keep being amazing and amazed 😂 Life is Beautiful even amongst the hardships. &nbsp;Be at Peace and Have Peace with one another, &nbsp;and Love One Another..... We r all just Pixels in the Big Picture....even if its Shattered 😲.....1 Love , All Love

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• JA

  @janagax · 1 year ago

  Okay, the bit at <a href="https://www.youtube.com/watch?v=EmKQsSDlaa4&amp;t=690">11:30</a> where a small section can be used like a window to the whole scene... I think it&apos;s the first time a youtube video has actually made my jaw literally drop

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• RO

  @robmunday2949 · 1 year ago

  Without question, the best video on how a hologram works that I have seen in my 42 years of making holograms. What’s more, I made one of the three holograms shown at the beginning of the video in the living room of my first house in 1986-87.

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• PR

  @progress1994 · 1 year ago

  Grant- I majored in Physics back in college and got my ass kicked. The entire experience still makes me feel dumb, even after several years operating/supervising nuclear power plants and managing engineering teams. One class in particular that really put a damper on my self-esteem was Optics.<br><br>This video gave me more intuition about optics than an entire semester at University of Washington. You communicated a subject that baffled many students like myself in a way that didn&apos;t feel dumbed down or inaccurate- just articulate and well-reasoned. Thank you for what you do; I hope you continue to make videos like these for a long time to come.

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• MY

  @My_initials_are_O.G.cuz_I_am · 1 year ago (edited)

  The fact that the microscope on a hologram works, while understandable when you think about the nature of the hologram in question, is still mindblowing AF.

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• RE

  @RenderingUser · 1 year ago

  3B1B is actually the best educational channel on YouTube

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• AL

  @alexwatt2298 · 1 year ago

  As a Physics teacher who has derived the diffraction equation many times on a whiteboard with all the limitations of that medium, being able to direct my students to this video for a far far more robust visualization is incredible! &nbsp;Thanks as always Grant!

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• DA

  @dan_duesentrieb · 1 year ago

  While watching I had the illousion that &quot;yes, I understand why that would make sense&quot; but now that I&apos;ve finished watching I realised that if somebody were to ask me about what he just said I&apos;d have no idea.

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• MA

  @Marc-dg2en · 1 year ago

  3Blue1Brown just called me &quot;rather clever&quot; and this unironically made my entire day.

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• RO

  @robspiess · 1 year ago

  <a href="https://www.youtube.com/watch?v=EmKQsSDlaa4&amp;t=1026">17:06</a>: &quot;Let&apos;s take a side-step into a mini-lesson so I don&apos;t have to rob you of that joy.&quot;<br>lol, I love it! &nbsp;Never change, Grant!

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• SE

  @sebastiantschen · 1 year ago

  I learned, while I was still a teenager, that holograms store phase-information additionally to amplitude, on a film-plate. What always bothered me, was that no source ever explained why that would somehow lead to a recording of the full 3D scene, or how that scene would later be reconstructed. I always thought, that for that to work, the film somehow had to store the &apos;direction&apos; of light beams. This Video was the first full explanation of how holograms are created, reconstructed, and why they do what they do, and it was beautiful. After more then 20 years of wondering if I would ever be able to undestand, what&apos;s going on in a hologram, you absolutely made my day!

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