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OPT3101: Opt3101 Phaseoffset calibration, the effect on measuring distance

Part Number: OPT3101

hi,

If phase offset calibration is not performed on opt3101, the distance measurement will be performed directly. Even if the actual distance between opt3101 and the measured object does not change, the distance value obtained by opt3101 measurement will change with the opt3101 PD received light energy, and the change is very obvious. Is this a normal phenomenon? If it is normal, what is the reason?

Thank you!
Dongming.cui