Ric Holland's Blog

castAR: versatile AR & VR system

castAR’s projected augmented reality system is comprised of two main components: a pair of glasses and a surface. The frames of the glasses contain two micro-projectors—one for each eye. Each projector casts a perspective view of a stereoscopic 3D image onto the surface. Your eyes focus on this projected image at a very natural and comfortable viewing distance. A tiny camera in-between the projectors scans for infrared identification markers placed on the surface. The camera uses these markers to precisely track your head position and orientation in the physical world, enabling the software to accurately adjust how the holographic scene should appear to you. The glasses get their video signal through an HDMI connection. The camera is connected via a USB port on the PC. They are still experimenting with communication options on mobile devices.!

UltraHaptics: Multi-Point Mid-Air Haptic Feedback for Touch Surfaces

Published on Sep 26, 2013

Published and presented at UIST ’13
Authors: Tom Carter, Sue Ann Seah, Benjamin Long, Bruce Drinkwater, Sriram Subramanian

UltraHaptics, a system designed to provide multi-point haptic feedback above an interactive surface. UltraHaptics employs focused ultrasound to project discrete points of haptic feedback through the display and directly on to users’ unadorned hands. We investigate the desirable properties of an acoustically transparent display and demonstrate that the system is capable of creating multiple localised points of feedback in mid-air. Through psychophysical experiments they show that feedback points with different tactile properties can be identified at smaller separations. They also show that users are able to distinguish between different vibration frequencies of non-contact points with training. Finally, they explore a number of exciting new interaction possibilities that UltraHaptics provides.

More information:…

Tactile Rendering of 3D Features on Touch Surfaces

Tactile rendering algorithm to simulate rich 3D geometric features (such as bumps, ridges, edges, protrusions, texture etc.) on touch screen surfaces. The underlying hypothesis is that when a finger slides on an object then minute surface variations are sensed by friction-sensitive mechanoreceptors in the skin. Thus, modulating the friction forces between the fingertip and the touch surface would create illusion of surface variations.

New interactions with devices we know

Dirti for iPad uses Tapioca as a substance that can be moulded to change the content on the screen. Watch the kids faces as they interact with the iPads (a device they’re probably already familiar with) in a way that is completely new.