AN580 Datasheet, PDF (3/10 Pages) Silicon Laboratories – INFRARED GESTURE SENSING

AN580
In Figure 2, the characterization for a two-LED system is displayed. Each LED must be characterized with a
target suspended over the midpoint between the LED and the sensing device. When Target 1 is suspended
over the sensing device and IR LED 1, the measured feedback will correlate to a distance D1 above the system.
The same is true for Target 2, IR LED 2, and D2.
Target 1
Target 2
D1
D2
IR LED 1
Si11xx
P1
P2
Figure 2. Distance Approximation
IR LED 2
Rev. 0.1
3