So I started buying the things I’m gonna need for my multitouch table after doing a shitload of research…
I have decided upon a Diffused Illumination setup vs a FTIR setup so that I have the option of doing fiducial tracking, which I really want to do. Its also a lot less work as far as soldering/powering/etc although I think its tough to get real good/even lighting.
Its actually pretty cheap to build a table, with the exception of the projector, which even at a heavy discount through an ebay purchase is still a pretty swift kick to my financial groin….
I settled on a BenQ MP522 Short Throw projector for both the ridiculously short throw distance (1.2 feet?!?!?) as well as the 1024×768 native resolution so I don’t get a super pixellated image. Its capable of 1280×1024 but I don’t know how that will looks since its not native. It also has 2500 lumen brightness, so it should be plenty bright for most indoor lighting. The projector goes for $870.00 new on Ebay but I got a unopened refurbished version with 0 hours on the bulb from ebay for $650.00 (plus shipping). Hopefully this will be by far the most expensive thing I purchase for thesis and I can build this table and concentrate on making software!
Here’s the projector’s New Egg page
I also ordered some IR flood lights for the table here. $18 a piece for arrays of 30 powered infrared super brights, not a terrible deal. I found another site with $16 arrays of 48 but the site has bad reviews and the lights didn’t look as nice.
Next things to do/buy:
- I need to get wood and plexi once I decide on dimensions and screen size. I’m thinking something around 50 inches diagonal would be pretty nice, not too big but not too small either.
- Take apart a PS3 eye and install an infrared filter on it. Also probably should get a wide angle lens for it
- Lee 225 lighting film for the projection surface and also diffusing film for the box
- power strips
I think thats it, getting there slowly but surely!
