A 3D display with variable depth moire pattern

In recent years, 3D display came to be used also for the vehicles. In the field of the three-dimensional display, the methods of using a parallax barrier and a lenticular lens are well-known. Like the parallax barrier and the lenticular lens, a moire type of 3D display is also proposed as one of the three-dimension systems with binocular parallax. However this method does not have a reverse stereoscopic vision area that the parallax barrier and the lenticular lens have. The display has a wide area observation zone, but it could give only a fixed depth feeling to observers. In this paper, we propose a moire type of 3D display which riot; only has a wide area observation zone, but has a variable depth by adjusting the pattern size finely with the zoom of a projector. By the estimation experiment with a prototype display, we confirmed that the proposal method can provide a variable feeling of depth continuously in a wide observation zone.