Author Topic: no pen whiteboard  (Read 5958 times)

Offline wiied

  • *
  • Posts: 1
  • Karma: +0/-0
    • View Profile
on: July 31, 2010, 12:22:16 AM
INFARED LASERS ARE DANGEROUS. THEY CAN AND WILL MAKE YOU BLIND, AND YOU WILL NOT SEE IT COMING.
THIS MAY BE A HORRIBLE IDEA.

The projects that have sprung up around the wii (and wii remote especially) are amazing.

Heres my two cents. use a thin crystal or glass rod to split the beam of a 940nm 15mw? laser into a plane over the whiteboard surface area. this would (hopefully) make it so when you move your hand to touch the whiteboard you break the plane of the laser, thus registering an ir source hit for the onlooking wii remotes. making ir pens a thing of the past, and turning your HDTV into a touchscreen, quick.
see http://www.youtube.com/watch?v=SPywgDBjM1Y for an idea how a laser acts through a rod/wine glass stem.
once they fire up the laser wine glass contraption you can see the cross sectional shape of the beam is not a uniform width. I believe this would cause calibration issues. Which brings me to why I post.
What could be used for a cleaner more uniform plane? and more importantly how dangerous is this laser?

other less important/baby questions:
would we need to "catch" the 940 nm plane at the edges of the "touch" area for any reason?
would particles in the air register false hits?
what could we use to "see" the plane to calibrate it? would a ruler covered in glow paint? where it glows it goes?
as the width of a uniform plane increases, the intensity of the light per square unit decreases. so thinner plane = less powerful laser = less dangerous?

so what do you think?

and who wants to give me a job?
« Last Edit: July 31, 2010, 12:36:38 AM by wiied »



Offline boonjin

  • *
  • Posts: 929
  • Karma: +28/-0
  • Smoothboard Developer
    • View Profile
    • Smoothboard
Reply #1 on: July 31, 2010, 04:45:51 AM
Hi,

You can use FTIR to achieve what you would like with a projector projecting at the rear of the screen.

Regards,
Boon Jin

Smoothboard
Wii Whiteboard/Wiimote Whiteboard with annotation features and collaborate with multiple iPads and Android Tablets!

Smoothboard for Mac
Using a Mac? Now you can annotate on PowerPoint or Keynote slideshows!

BoonJin[/url


Offline petcart

  • *
  • Posts: 1
  • Karma: +0/-0
    • View Profile
    • Provillus Reviews
Reply #2 on: August 03, 2010, 01:37:52 PM
These guys always have some geat ideas and this could really work.
Actually if we talk about this new project it could be very interesting for security.
For example put it in your office or home and laser not only protects your house but record the burglers body. Of course you should work on it very much but this could really work and I think that could be really great product these days.
Think about it and if you need some help PM ;)
Lets make some business  ;D


Offline Ulfilas

  • *
  • Posts: 26
  • Karma: +0/-0
  • A Light Shines in the Darkness...
    • View Profile
Reply #3 on: October 07, 2010, 10:02:36 AM
There are several multitouch things using lasers - over at the nuigroup forums. One really nice one uses a rear projection tv with lasers and cameras to do it.

There are also multitouch overlays available for plasma/lcd screens - I am going to look into these to see if they can be used on say a rear projection screen instead...