Electrical mixer as reference path for time-of-flight measurement
First Claim
1. An imaging system, comprising:
- a modulation component to provide a modulation signal;
an illumination component to;
receive the modulation signal and emit a modulated optical signal based on the modulation signal; and
provide an electrical illumination signal,wherein the electrical illumination signal is an electrical representation of the modulated optical signal emitted by the illumination component; and
a sensor pixel arranged to receive a reflected modulated optical signal after the modulated optical signal is reflected by an object,the sensor pixel being associated with an integration time corresponding to an exposure time of the sensor pixel;
an electrical mixer to;
receive the electrical illumination signal and the modulation signal;
multiply the electrical illumination signal and the modulation signal in order to form a mixed signal;
filter the mixed signal in order to form a filtered mixed signal; and
output, based on the filtered mixed signal, a calibration signal associated with calibrating the imaging system,the calibration signal being independent of the integration time associated with the sensor pixel.
1 Assignment
0 Petitions
Accused Products
Abstract
An imaging system may include a modulation component to provide a modulation signal. The imaging system may include an illumination component to receive the modulation signal and emit a modulated optical signal based on the modulation signal, and provide an electrical illumination signal. The electrical illumination signal may be an electrical representation of the modulated optical signal emitted by the illumination component. The imaging system may include an electrical mixer to receive the electrical illumination signal and the modulation signal, multiply the electrical illumination signal and the modulation signal in order to form a mixed signal, filter the mixed signal in order to form a filtered mixed signal, and output, based on the filtered mixed signal, a calibration signal associated with calibrating the imaging system.
5 Citations
11 Claims
-
1. An imaging system, comprising:
-
a modulation component to provide a modulation signal; an illumination component to; receive the modulation signal and emit a modulated optical signal based on the modulation signal; and provide an electrical illumination signal, wherein the electrical illumination signal is an electrical representation of the modulated optical signal emitted by the illumination component; and a sensor pixel arranged to receive a reflected modulated optical signal after the modulated optical signal is reflected by an object, the sensor pixel being associated with an integration time corresponding to an exposure time of the sensor pixel; an electrical mixer to; receive the electrical illumination signal and the modulation signal; multiply the electrical illumination signal and the modulation signal in order to form a mixed signal; filter the mixed signal in order to form a filtered mixed signal; and output, based on the filtered mixed signal, a calibration signal associated with calibrating the imaging system, the calibration signal being independent of the integration time associated with the sensor pixel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification