Mark E. Lasher's research while affiliated with Naval Medical Center San Diego and other places
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Publications (9)
The Space and Naval Warfare (SPAWAR) Systems Center, San Diego (SSC San Diego) Simulation and Human Technology Division has developed and improved its second generation 3-D Volumetric Display System for displaying data, information, and scenes in a three dimensional volume of image space. The system has good potential for many military and commerci...
A novel type of electro-optic diffractive element is presented which can
satisfy the requirements for a high space-time bandwidth deflector while
providing for two-dimensional random access beam steering control. The
basic device consists of a multichannel array of phase modulators
fabricated using Lanthanum-modified lead zirconate titanate (PLZT)...
A three dimensional volumetric display system utilizing a rotating helical surface is described. The rotating helix system permits images to be displayed in a three-dimensional format that can be observed without the use of special glasses. Its rotating helical screen sweeps out a cylindrical envelope, providing a volumetric display medium through...
A 3D volumetric display system utilizing a rotating helical surface is described. The rotating helix system permits images to be displayed in a 3D format that can be observed without the use of special glasses. Its rotating helical screen sweeps out a cylindrical envelope, providing a volumetric display medium through which scanned laser pulses are...
A three dimensional volumetric display system utilizing a rotating helical surface is described. The rotating helix system permits images to be displayed in a three-dimensional format that can be observed without the use of special glasses. Its rotating helical screen sweeps out a cylindrical envelope, providing a volumetric display medium through...
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 secon...
NRaD, the RDT&E Division of the Naval Command, Control and Ocean Surveillance Center (NCCOSC), has developed 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...
An all solid-state 1280 X 1024 laser raster scanner (LRS) system
conforming to the EIA RS-343 television standard with a limiting
resolution of 1300 TV lines has been developed. The laser scanner
incorporates acousto-optic devices to perform video modulation and X-Y
deflection and is used in time-multiplexed mode to photoactivate three
liquid cryst...
For several years, the Naval Ocean Systems Center (NOSC) has been working on the development of laser-based display systems with the goal of upgrading the image quality and ruggedness of shipboard displays. In this paper we report work on our major task of developing a full-color laser-addressed liquid crystal light value (LCLV) projection system.
Citations
... 4 Recently there have been several nonmechanical beam-steering devices developed by different research groups. [5][6][7][8][9][10][11] With its low driving voltage and mature low-cost fabrication technology, liquid-crystal LC technology seems to be an excellent candidate for beam-steering devices. The effort in the development of LC beam deflectors can be traced back to the early 1970's. ...
Reference: Liquid-Crystal Blazed-Grating Beam Deflector
... A holographic display [3,4] can reconstruct amplitude and phase of 3D image, but, currently, the displayed object cannot be viewed from any direction due to the limitation of view angle. Many methods have also been proposed to achieve volumetric display by regenerating many volume-filling data, such as the Helix 3D display [5], the DLP/Helix 3D display [6], the FELIX 3D display system [7], and the Perspecta 3D display system [8]. These displays can provide semi-transparent natural-looking 3D imagery, which is 360-deg viewable, but correct light angular distribution of each voxel cannot be easily achieved due to the principle, so as the correct occlusion of the displayed objects. ...
... Except for one prototype 3-D display in Oxford (Eagle et al, 2000), the accommodation cue can only be added by imaging the scene at physically different distances. The most advanced system is the US Navy sponsored " volumetric display " which achieves this by imaging on a rotating drum (Soltan et al, 1998). Its large volume (approximately 1 m 3 ) makes it unsuitable for the type of applications we have in mind. ...
Reference: The case for transparent depth displays
... Of the types described above (those with a real collecting surface), the helical design has reached maturity. The most elaborate equipment uses a double-helix filling an 91-cm-diameter by 46-cm-high volume at 10 revolutions per second with a maximum of 40,000 color pixels per frame (or 120,000 pixels in the color primaries) (Soltan et al., 1995). Viewers can walk around the display and observe the imaged objects from different angles. ...
... The dynamic swept displays employ highspeed rotation mechanism to drive the display plane to change the corresponding view point images every 1 " 2 degrees. Examples of dynamic swept displays include one point color Laser projection onto a helix surface [1,28], projection onto a high-speed rotating inclined surface by multi-projectors [22], projection on to a high-speed rotation surface by a single high-speed DLP projector [9,11,14] or a helix surface [31], projection onto a highspeed rotation prism by a single high-speed DLP projector and reflecting on a cylindrical screen [24], and high-speed rotation and displaying of a linear(2D) LEDs array [10,35]. The volumetric displays provide very accurate depth perception, but the amount of data for displaying is 100 times more than the flat 3D displays. ...
