Patent ID: 11927669
Assignee: MELEXIS TECHNOLOGIES NV
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method of calculating a phase angle in accordance with an indirect time of flight range calculation technique, the method comprising:
a light source emitting light in accordance with the indirect time of flight measurement technique;
a photonic mixer cell generating and storing a first plurality of electrical output signals respectively corresponding to a first plurality of predetermined phase values applied in accordance with the indirect time of flight measurement technique;
a signal processing resource processing the first plurality of electrical output signals in accordance with the indirect time of flight measurement technique in order to calculate a first vector and a first angle from the first vector;
the photonic mixer cell generating and storing a rotated second plurality of electrical output signals corresponding to a second plurality of predetermined phase values applied in accordance with the indirect time of flight measurement technique;
the signal processing resource processing the rotated second plurality of electrical output signals in accordance with the indirect time of flight measurement technique in order to calculate a rotated second vector;
the signal processing resource de-rotating the rotated second vector calculated and calculating a second angle from the de-rotated second vector, and to offset the second angle calculated against the first angle calculated in order to generate a corrected output angle; wherein
each phase value of the second plurality of predetermined phase values is respectively offset with respect to each phase value of the first plurality of predetermined phase values by a predetermined phase offset value.