4 ms·
Depends if we consider holograms only the specific technique of using phases to encode the information or any general technique that can encode 3D information o
by gpderetta 2y ago
Depends if we consider holograms only the specific technique of using phases to encode the information or any general technique that can encode 3D information on a 2D surface.
This solution relies on a physicals height map (in the author's word, a 2.5D surface), whether that counts as a 2D surface I don't know.
(and yes, I also saw the great explanation from 3blue1brown).
- deleted 2y ago[deleted]
- deleted 2y ago[deleted]
- CyberDildonics 2y agoany general technique that can encode 3D information on a 2D surface This isn't 3D information on a 2D surface. If anything it is 2D information on a 3D surface.
- gpderetta 2y agoThe video shows that it projects a 3D surface as if it was storing volumetric information.
- CyberDildonics 2y agoIt isn't projecting a 3D surface (I'm not sure that even makes sense in this context) and it isn't storing volumetric information. It is just using refraction to make brighter and darker areas in its shadow/caustics to make an image. The paper is 10 years old at this point and linked by this article. https://rgl.s3.eu-central-1.amazonaws.com/media/papers/Papas2011Goal.pdf https://rgl.s3.eu-central-1.amazonaws.com/media/papers/Papas... https://nishitalab.org/user/egaku/tog14/yue-continuous-caustics-lens.pdf https://nishitalab.org/user/egaku/tog14/yue-continuous-caust... I think once you read the papers you will realize that the only thing 3D is the surface of the lens and that is only so it can get curves and angles for the refraction.