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>LLP (Laser Light Plane) touch surface

> LLP projector mount

> LLP laser mount (temporary)

> LLP frame

We have another twin frame of FTIR (Frustrated Total Internal Reflection) surface.

Photographs by Garrett Baumgartner.

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• Portability
• Light weight
• Airline dimension restrictions
• Reconfigurability
• Ease of assembly
• Replaceable parts

Since this is part of the CIRO project as well as prototyping for the larger screen, we had to design flexible methods of mounting the lasers (laser brackets).

We designed the laser bracket so that it could sit on the screen while being able to level the lasers accurately; accuracy of how the laser sits becomes more important as the screen gets larger.

(laser bracket rear view exploded)

(>laser bracket design has been improved since this image was prepared)

This screen frame has the secondary enclosing frame to protect the laser equipment and to limit the possibility of laser light beams spreading into the viewer’s vision plane.

(section view of the corner frame showing light dam)

When it is all enclosed you will see this baffle surrounding the screen and hidden laser mounting rails.

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This is a 3D image of the portable multitouch screen frame design as part of the prototyping for the CIRO project.

Initially, the project was formed around the idea of investigating current multi-touch prototyping methodologies in order to develop a suitable environment and technology for the study of creative applications of multitouch interfaces.
It was further defined that we would attempt to improve upon the design of an existing commercial touch surface that had proven to be not effective for the intended goal of developing a viable multitouch prototyping environment.

Problems defined with the existing model:

• Structural Instability

• Limited usability; ‘not easily re-configurable’

• No documentation; proprietary packaging mentality.

This led to two divergent research paths; the existing system was an FTIR (Frustrated Total Internal Reflection) based multitouch technology. We therefore decided to improve that system and develop an alternate system for the new prototype. It was determined that this new parallel system would consist of LLP (Laser Light Plane) technology. Both systems were to have similar footprints so that the user interaction between them was not influenced by any physical difference between the support structures.

This frame design also improved upon the adjustability of the projector/camera mounting for the multitouch surface.

While fixing the older model of the frame, we had to redesign the corner bracket which would be ordered from 80/20 with other standard frame parts.

(27″ x 18″ portable multitouch screen with casters)

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when you get older, you become a more spacial being, maybe not so much momentary as you were when younger, not so much a being in immediacy, in time.

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> different views of L-module components

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Reflected Image in the L-module component

> possible corner screen material: mirrors, acrylic sheets, or reflective screens…

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Possible Configuration Assembled from the Modular Components

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> Assembly Color Code

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