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A holographic display is a type of 3D display that utilizes light diffraction to display a three-dimensional image to the viewer. Holographic displays are distinguished from other forms of 3D displays in that they do not require the viewer to wear any special glasses or use external equipment to be able to see the image, and do not cause a vergence-accommodation conflict.
The holographic information is recorded by the speckle pattern. Holography is a technique for recording and reconstructing light fields. [16]: Section 1 A light field is generally the result of a light source scattered off objects.
Displays using the first method are called ray-based or light field displays. Displays using the second method are called wavefront-based or holographic displays. Wavefront-based displays work in the same way as holograms. Compared to ray-based displays, a wavefront-based display not only reconstructs the light field, but also reconstructs the ...
A lot of the technology billed as holographic, well, isn't. Not even HoloLens. Real holography requires a laser-generated 3D image, and it's no mean feat to stuff that into something you can ...
It involves generating holographic interference patterns. A computer-generated hologram can be displayed on a dynamic holographic display, or it can be printed onto a mask or film using lithography. [1] When a hologram is printed onto a mask or film, it is then illuminated by a coherent light source to display the holographic images.
Some examples of this type of display include Microsoft's HoloLens I, II, Google Glass, and Magic Leap. Items like these are often very expensive due to the high cost of materials used to produce HOEs. [1] [14] There is also a second type of 3D visualization method that looks to replicate 3D objects through the creation of light fields. This ...