Author Topic: Can the WiiMote/ IR LED Array work through a 2-way mirror with naked fingers?  (Read 3896 times)


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Greetings all,

I was wondering if anyone here knew if a WiiMote/IR LED array would be able to track naked fingers accurately with a 2-way mirror in between the WiiMote/IR LED Array and user's fingers?

For those that do not know exactly what a 2-way mirror is then read on. Essentially a 2-way mirror is an 1/8th to 1/4th inch thick glass or transparent acrylic plane in which both sides are treated with a 2-way mirror finish. The 2-way Mirror Finish essentially makes the glass, or acrylic, plane behave like a mirror when looking at it with in a brightly lit room. However when looking at the plane from a completely dark room, it behaves like a window.

To see what it looks like when taking a photograph through a 2-way mirror facing a brightly lit room look at the below picture

Here is the same picture taken with out the 2-way mirror inbetween camera and objects.

More info on 2-way mirrors can be found here:

I have to know if the IR setup (wiimote and IR LED array) will be able to track naked fingers (fingers with out reflective paper, etc) accurately at a distance of about 2 to 3.5 feet. The 2-way mirror website that I provided a link to above says that a TV remote will be able to turn on a TV through the 2-way mirror but we are talking about finger tracking here.

You thoughts?