Patent ID: 11874403
Assignee: INFINEON TECHNOLOGIES AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 17:
18. A time-of-flight (ToF) measurement device, comprising:
a light source configured to emit a series of light pulses formed by amplitude-modulating light with a modulating signal;
a ToF sensor comprising a plurality of pixels configured to generate a respective plurality of pixel signal values in response to received light, wherein each pixel is configured to obtain its respective pixel signal value by demodulating received light using a reference signal;
a reference signal generator configured to generate the reference signal and to provide the reference signal to the plurality of pixels; and
control circuitry configured to control the light source, ToF sensor, and a reflectance map generator to:
obtain a distance measurement, using one or more pixels in the ToF sensor;
obtain an intensity measurement corresponding to the distance measurement, using the one or more pixels; and
calculate a reflectance value for the one or more pixels, based on the distance measurement, the intensity measurement, and a reflectance calibration factor, wherein said calculating comprises multiplying the intensity measurement by the reflectance calibration factor and by a factor proportional to the square of the distance measurement.