Spinning mirror system

Spinning mirror systems are used to build interactive 3D graphics and autostereoscopic to multiple simultaneous viewers around the screen, since we can generate a different view to each viewer depending on the angle of vision that takes over the screen.

Because these mirrors are mobile and gyratory they can create perspective different in 360 degrees around it, therefore they will be used in systems that seek to create images omnidirectionals. In addition, they adjust to possible systems multivision, therefore they will produce a correct interpretation of the field of light though the potential spectator places to more or less distance or to more or less height.

If we combine them with a projector of high speed of video and a circuitry entrusted to decode adapted, we can manage to obtain different perspectives up to in every 1,25 degrees.

A similar system was commercially released in 1981 for the Entex Adventure Vision game console. The console, however, didn't aim for 3D visualization, but instead used the spinning mirror to project a 2D picture from a row of LEDs.

The preceding volumetric systems were projecting the images in a diffuse plane of rotation, thus, the light was remaining dispersed in all directions. Unfortunately, these displays could not recreate dependent effects as for example the occlusion. There was created, therefore, the need to create a system that was capable of settling misadventures as this one, but in turn it had an easy implementation and was doing that his installation on systems was simple. Thus, create a System of gyratory mirrors covered by a holographic diffuser anisotropic.

The mirrored surface reflects each projector pixel to a narrow range of viewpoints. The holographic diffuser provides control over the width and height of this region. The characteristics of the diffuser are such that the relative diffusion between x and y is approximately 1:200.

Horizontally, the surface is sharply specular to maintain a 1.25-degree separation between views. Vertically, the mirror scatters widely so the projected image can be viewed from essentially any height.

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Wikipedia