Theâ parameter equals the amplifier’s offset plus ambient
light effect. It can be obtained by taking a reading without
IR emission. Under these conditions, this reading will
correspond with the value of the parameter â . A new
reading is taken immediately after IR emission is activated
By subtracting the previous reading, a signal without
offset â is obtained. Thus, the influence of all the light
sources, even fluorescent or incandescent lights, can be
removed. By naming this ‘cleaned’ signal as y, Eq. (1) can
be rewritten as
Theâ parameter equals the amplifier’s offset plus ambientlight effect. It can be obtained by taking a reading withoutIR emission. Under these conditions, this reading willcorrespond with the value of the parameter â . A newreading is taken immediately after IR emission is activatedBy subtracting the previous reading, a signal withoutoffset â is obtained. Thus, the influence of all the lightsources, even fluorescent or incandescent lights, can beremoved. By naming this ‘cleaned’ signal as y, Eq. (1) canbe rewritten as
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