Touchscreen Progress 7
I found this interesting article last night. Here's the important part:
Interesting stuff. Here's my experiment using paper + plastic wrap as a screen surface. Note that there is a fair amount of light in the room (it's right next to window) but the paper flattens out the background noise nicely and acts as projection surface. On the downside, the contrast is not very high. A better filter on my camera might also help.. I'm still using photo negatives.
I ordered some Plasti-dip (spray rubberizer) which should be arriving today. I'll be doing some more tests.
The amount of light that can be drawn out with FTIR is dependent on many things: wavelength, airgap thickness, refractive index of each medium, and angle of incidence.
Interesting stuff. Here's my experiment using paper + plastic wrap as a screen surface. Note that there is a fair amount of light in the room (it's right next to window) but the paper flattens out the background noise nicely and acts as projection surface. On the downside, the contrast is not very high. A better filter on my camera might also help.. I'm still using photo negatives.
I ordered some Plasti-dip (spray rubberizer) which should be arriving today. I'll be doing some more tests.
posted by David Wallin at 4:45 AM
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