Understanding Stereoscopic Vision- Stereoscopic vision is defined as three-dimensional vision produced by the fusion of two slightly different views of a scene received from each eye.
- For the best 3D sensation, different lenticular lenses require different viewing distances. For example, one lenticular lens would be used for a handheld postcard, and another one would be used for larger POP signs or vending machines.
Seeing a Jump in the picture- When the viewer moves his head from side to side, he is actually sequentially viewing all the viewpoints beneath the lenticular lens. When the eye reaches the last viewpoint in the series, the first viewpoint reappears. The brain translates this motion between the last viewpoint and the first viewpoint as a jump, as the first and last views are significantly different. This is the basis of stereoscopic vision.
Viewing 3D from a distance- In order to see 3D, each eye has to see a slightly different image. It can be compared to hearing stereo: in order to hear in stereo each ear has to hear a different sound.
- When sitting in a stadium, if the listener is too far away from the speakers, only mono will be heard, as the listener is too far away for each ear to receive a different sound. Similarly, if the viewer is too far away, each eye will not see a different picture and therefore only a 2D image will be seen.
- A limitation of human vision is that we can only see 3D up to about 15 meters (50 feet). When viewing lenticular pictures, the viewing distance also depends on the lenticular lens type and the printing method.
Using light to view images- While It isn't necessary to incorporate light in your display using a back-lit substrate, in certain applications can maximize the existing 3D effect.
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