This is from your link.
Originally Posted by Krafter
The Wii Remote's image sensor is used to locate the Sensor Bar's points of light in the Wii Remote's field of view. The light emitted from each end of the Sensor Bar is focused onto the image sensor which sees the light as two bright dots separated by a distance "mi" on the image sensor. The second distance "m" between the two clusters of light emitters in the Sensor Bar is a fixed distance. From these two distances m and mi, the Wii CPU calculates the distance between the Wii Remote and the Sensor Bar using triangulation.
Not that I doubt YOU in any way, but I think this might confirm my theory about triangulation.
Whether I am right or wrong is to be determined.
I have confirmed that my wii menu functions with half of the sensor bar functioning, just not channels thereafter, thus implementing that the triangulation is needed from there on.