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Stereoscopy is presenting the viewer(s) with two separate images, each image taken/rendered from a different perspective. Autostereoscopy is doing so without glasses. Whether the method used to separate these images is a parralax barrier or lenticular lens, the viewer needs to view from a so-called "sweetspot", where each eye sees only the image intended for it, and certainly not the image intended for the other eye. These technologies divide the image into vertical lines where every second line is either blocked(parallax) or diffracted(lenticular), and so whether the display has only one sweet spot or a dozen there are just as many "sour spots" where the left and right images are swapped. I have seen the Fujifilm 3-D camera autostereoscopic display and the Neo3D0 autostereoscopic displays and both have the same predictable constraint. Head tracking works by dynamically swapping left and right images as the viewer moves sideways. 220.127.116.11 (talk) 03:52, 3 January 2015 (UTC)
eyes must be horizontal?
All effects do need the horizontal distance of the pair of eyes. Is that correct?
If you ly down on a couch, looking horizontally to the side, with one eye above the other, I expect that all autostereoscopy fails.
The question arises: Are there methods of autostereoscopy, that work with vertically aligned eyes, too?
In natural surrounding, according to the growing of grass and other plants, vertical lines are possibly the more probable possibility to function as anchors for stereoscopic seeing. Archtitecture, especially the edges of stairsteps deliver more horizontal lines. --Helium4 (talk) 09:01, 21 October 2015 (UTC)
TriLite Technologies GmbH reached the step of a second prototype in October 2015. Based on one RGB-laser plus mirror per pixel. Aim is to build large daylight visible screens, billboards.
Press releases: https://www.tuwien.ac.at/en/news/news_detail/article/9249/ and http://www.trilite-tech.com/back-to-the-future-science-fiction-turns-science-fact/ --Helium4 (talk) 10:08, 21 October 2015 (UTC)
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The start of one paragraph currently reads:
For a start, surely "lenticular" means "of, related to or using lenses" (lentils are shaped very like lenses, although I don't know which gave its name to the other), so "lenticular lens" is redundant? Also, in stereoscopy, "lenticular" is frequently (mis)used to refer to the type of display which is more correctly known as "parallax barrier" (I believe "lenticular" to be an incorrect usage as no lenses are involved); the point I'm making here is that these "two" techniques are two different names for the same technique. — 2A02:C7D:419:2500:F127:1CC3:130:336F (talk) 16:11, 6 August 2017 (UTC)