Haptic holography : an early computational plastic

Thesis (Ph. D.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2001.Includes bibliographical references (p. 135-148).This dissertation introduces haptic holography, a combination of computational modeling and multimodal spatial display, as an early computationalplastic In this work, we combine various holographic displays with a force feedback device to image free-standing material surfaces with programmatically prescribed behavior. We present three implementations, Touch, Lathe, and Poke, each named for the primitive functional affordance it offers. In Touch, we present static holographic images of simple geometry, reconstructed in front of the hologram plane (in the viewer's space), and precisely co-located with a force model of the same geometry. These images can be visually inspected and haptically explored using a hand-held interface. In Lathe, we again display holo-haptic images of simple geometry, this time allowing those images to be reshaped by haptic interaction in a dynamic but constrained manner. Finally in Poke, we present a holo-haptic image that permits arbitrary reshaping of its reconstructed surface. As supporting technology, we offer a new technique for incrementally computing and locally updating interference-modeled holographic fringe patterns. This technique permits electronic holograms to be updated arbitrarily and interactively, marking a long-held goal in display holography. As a broader contribution, we offer a new behavior-based spatial framework, based on both perception and action, for informing the design of spatial interactive systems.Wendy J. Plesniak.Ph.D

Volumetric rendering for holographic display of medical data

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1988.Includes bibliographical references.Work funded by a joint IBM/MIT agreement.by Wendy J. Plesniak.M.S

In Three-Dimensional Holographic Imaging, Eds. C.J. Kuo and M.H. Tsai, Wiley-Interscience, 2001 1 Tangible, Dynamic Holographic Images

Good holograms are bewitching. They command our eyes to their images, to search the marvelous realness of surfaces, textures, and minute detail for some aberration, some visual clue that will dissuade us from seeing as real what we know is not. Yet while they seem to assemble the very molecules of physical matter for us to ponder, they also present a conundrum: The objects they render appear frozen, lifeless, and confounding to our fingertips. What if we could render these images animate and touchable, as phantom material that was both dynamic and plastic? Such an ultimate display would be both powerful and magical; it would deliver naturally to our spatial proficiencies, inspire our imaginations, and perhaps even provoke our emotions. Of course, such a display does not yet exist, and many challenges to its development remain. But while current technology still leaves us in the shadow of such a goal, we are beginning to see it as more real than chimerical. To this end, we will describe our first experiments with tangible, dynamic holographic images. Our prototype system, called the holo-haptic system, comprises a sizeable arsenal of computers and both commercial and custom hardware. The visual images it produces for these experiments are monochromatic, postcard-sized, and depict only simple geometries. The haptic images it produces are felt and shaped with a hand-held device. Thus, the trappings of engineering are anything but transparent to the experience, and the demonstrations themselves are artistically unsophisticated. But by using this agglomeration of technology in simple demonstrations, we can feel and sculpt threedimensiona