The viewing angle of your LEDs is too small, increase the viewing angle by filing the LED lens tips down flat, almost to the metal part and then make the final finish transparent matte (not too shiny, not too rough).
...their viewing angle is too narrow for head tracking but this is easily fixed by filing the lens tips down flat. This reduces their brightness due to a wider emission angle but they're still no less bright than commercially bought wide angle LEDs like SFH485P.
this might sound dumb but i was excited when i first discovered the whole whiteboard thing, so i rushed into this.. i ripped an IR LED out of an old remote.. did not check the viewing angle before constructing my pen..it looks from what i can see with my digital camera (most can see IR, did you know?) that looking at the LED from the side, and especially the rear-side angle, you can hardly see the light at all. i am doubtful the wiimote will be able to detect this. (havent tried, bluetooth dongle is in the mail!)i briefly googled my problem and seemed to find an old post on an unrelated subject which happens to also be able wide viewing angles for LEDs. it was said:QuoteThe viewing angle of your LEDs is too small, increase the viewing angle by filing the LED lens tips down flat, almost to the metal part and then make the final finish transparent matte (not too shiny, not too rough).Quote...their viewing angle is too narrow for head tracking but this is easily fixed by filing the lens tips down flat. This reduces their brightness due to a wider emission angle but they're still no less bright than commercially bought wide angle LEDs like SFH485P.so i am considering filing down the tip of my LED. i am far too impatient to wait for the correct part to come in the mail. i will of course order it, but in the mean time.. will this work? maybe? tips? (how do i make the finish transparent matte??)