Accession Number : ADA306215

Title :   Laser-Based 3-D Volumetric Display System (The Improved Second Generation).

Corporate Author : NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA

Personal Author(s) : Soltan, P. ; Trias, J. ; Dahlke, W. ; Lasher, M. ; McDonald, M.

PDF Url : ADA306215

Report Date : MAR 1996

Pagination or Media Count : 27

Abstract : NRaD, the RDT&E Division of the Naval Command, Control and Ocean Surveillance Center (NCCOSC), has developed and improved its second-generation device for displaying data, information, and scenes in a three-dimensional volume of image space. The device incorporates a 36-inch diameter double helix that spins at approximately 10 revolutions per second, providing a means to address a cylindrical volume. Under computer control, a laser beam is directed to illuminate certain discrete volume points (voxels) on the helix needed to create a scene. The laser light scatters from the surface of the helix, so, to the observer, each voxel appears to emanate from specific points in space. Each point has x-y coordinates determined by the position of the laser beam and a z coordinate determined by the height of the point on the helical surface. Any point within the cylindrical image volume can be computer-addressed to appropriately synchronize the laser beam, the Acousto-Optic (AO) Scanner, and the phase of the helix. Using a novel Acousto-Optic (AO) Random-Access Scanner, up to 40,000 laser-generated voxels refreshed at 20 Hz per color are projected onto the reflective surface of the rotating helix. (This is about 10 times more than the current state of the art.) The higher resolution allows improved color images, updated in real-time, for group viewing with the naked eye.

Descriptors :   *THREE DIMENSIONAL, *IMAGES, *COLOR DISPLAYS, *DATA DISPLAYS, *VOLUMETRIC ANALYSIS, CONTROL, REAL TIME, COMPUTERS, REFLECTION, LASER BEAMS, HIGH RESOLUTION, SURFACES, GRIDS(COORDINATES), LASER APPLICATIONS, CYLINDRICAL BODIES, COORDINATES, COLORS, DISCRETE DISTRIBUTION, HEIGHT, ACOUSTOOPTICS, OCEAN SURVEILLANCE, HELIXES.

Subject Categories : Information Science
      Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE