How do 3D glasses work - Sixty Symbols

A visit to the toilet is included in Professor Phil Moriarty's explanation of 3D glasses. How do 3D films give us that three dimensional effect?

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Category:

Science & Technology

Tags:

• 3D glasses
• 3D
• three-dimension
• 3dimensions
• Stereoscopy
• movies
• film
• cinema
• 3D films

[InsideDating]

Ah dangit I thought you were Michael from Vsauce

[kraxzor]

Awesome ! prof Moriarty is great

[Gnometower]

@Sunderas mostly because 3D projections are only perfect for one single spot in the centre of the audience. For every other seat, the depth perception is always slightly offset, making the image blurry.

[DansVlogz]

Lol, this would take my teachers 1 month to teach.

[TheTrueRandomness]

"bazillion times a second.....to use a technical term"

[Eringuy13]

Wow this is the first time ive seen who films all of these videos 

[1206549]

@cheese319 well maybe we can't call it "true" parallax vision but the thing is most of the time, your head keeps changing positions slightly. if you have one eye, and you look at some thing the you tilt your head slightly, you have two images for your brain to work with and compare. just watch the gifs on this site (squidoo.com/3d-animated-gif)

[1206549]

@weldad22 there are 2 images overlapping each other, one for each eye. some pixels are for the right some for the left. then lenticular lenses (wikipedia. org/wiki/Lenticular_printing) or Parallax barriers (wikipedia. org/wiki/Parallax_barrier) are used to taget each pixel to a different eye

[1206549]

@Syhedghog probably but if this just happened to you and your not used to it, probably not. why don't you try it?

[mrrig91]

@bedevere007 This is stereoscopic 3D. Your glasses actually only let you see through one lens at a time, blacking one out while viewing through the other. At the same time your TV or monitor flashes a different image in sync with the glasses, showing you a different image through each eye. A normal monitor refreshes at 60Hz, to achieve the same smoothness with stereoscopic 3D you need 120Hz (60Hz per eye). Now I don't know the technicalities but this flashing of each lens requires power.

[cheese319]

@1206549 But they are not perceiving depth. Depth perception comes from parallax, there is no parallax with one eye.