Embodiments of the disclosure provide an integrated transmitter-receiver module for a LiDAR assembly. The integrated transmitter-receiver module includes a laser emitter configured to emit optical signals to an environment surrounding the LiDAR assembly. The integrated transmitter-receiver module also includes a receiver configured to detect returned optical signals from the environment. The laser emitter and the receiver are pre-aligned to focus the returned optical signal on one or more detectors of the receiver and are disposed on a shared base wherein the shared base is configured to assemble the integrated transmitter-receiver module to the LiDAR assembly.

The disclosure relates to a method for simulating sensor data of a continuous wave (CW) Light Detection and Ranging (lidar) sensor. The method includes generating a ray set comprising at least one ray, based on a CW signal, where each ray in the ray set has an emission starting time and an emission duration. The method further includes propagating, for each ray in the ray set, the ray through a simulated scene including at least one object; computing, for each ray in the ray set, a signal contribution of the propagated ray at a detection location in the simulated scene; generating an output signal, based on mixing the CW signal with the computed signal contributions of the rays in the ray set; and at least one of storing and outputting the output signal.

The disclosure relates to a method for simulating sensor data of a continuous wave (CW) Light Detection and Ranging (lidar) sensor. The method includes generating a ray set comprising at least one ray, based on a CW signal, where each ray in the ray set has an emission starting time and an emission duration. The method further includes propagating, for each ray in the ray set, the ray through a simulated scene including at least one object; computing, for each ray in the ray set, a signal contribution of the propagated ray at a detection location in the simulated scene; generating an output signal, based on mixing the CW signal with the computed signal contributions of the rays in the ray set; and at least one of storing and outputting the output signal.

A delay line control circuit includes a pseudo-random number generator and a random phase generator circuit coupled to the pseudo-random number generator. The pseudo-random number generator is configured to produce a predetermined sequence of pseudo-random values. The random phase generator circuit is configured to randomize an access sequence for capacitors of a delay line. The random phase generator circuit includes a sequence register, an adder, and gating circuitry. The sequence register is configured to a store a value identifying one of the capacitors to be accessed. The adder is coupled to the sequence register, and is configured to increment the value stored in sequence register. The gating circuitry is coupled to the pseudo-random number generator and the adder. The gating circuitry is configured to pass one of the pseudo-random values to the adder for addition to the value stored in the sequence register.

A delay line control circuit includes a pseudo-random number generator and a random phase generator circuit coupled to the pseudo-random number generator. The pseudo-random number generator is configured to produce a predetermined sequence of pseudo-random values. The random phase generator circuit is configured to randomize an access sequence for capacitors of a delay line. The random phase generator circuit includes a sequence register, an adder, and gating circuitry. The sequence register is configured to a store a value identifying one of the capacitors to be accessed. The adder is coupled to the sequence register, and is configured to increment the value stored in sequence register. The gating circuitry is coupled to the pseudo-random number generator and the adder. The gating circuitry is configured to pass one of the pseudo-random values to the adder for addition to the value stored in the sequence register.

A chip-scale coherent lidar system includes a master oscillator integrated on a chip to simultaneously provide a signal for transmission and a local oscillator (LO) signal. The system also includes a beam steering device to direct an output signal obtained from the signal for transmission out of the system, and a combiner on the chip to combine the LO signal and a return signal resulting from a reflection of the output signal by a target. One or more photodetectors obtain a result of interference between the LO signal and the return signal to determine information about the target.

A chip-scale coherent lidar system includes a master oscillator integrated on a chip to simultaneously provide a signal for transmission and a local oscillator (LO) signal. The system also includes a beam steering device to direct an output signal obtained from the signal for transmission out of the system, and a combiner on the chip to combine the LO signal and a return signal resulting from a reflection of the output signal by a target. One or more photodetectors obtain a result of interference between the LO signal and the return signal to determine information about the target.

A method for corrected depth measurement with a time-of-flight camera using amplitude-modulated continuous light. In order to enable an accurate and efficient depth measurement with a time-of-flight camera, the method includes, for each of a plurality of pixels of a sensor array of the camera: acquiring with the camera a raw depth value r.sub.m for the pixel; and automatically calculating a ground truth value r.sub.t according to: r.sub.t=g(r.sub.m−c.sub.m)+c.sub.t, to correct a systematic depth error of the raw depth value r.sub.m, wherein c.sub.m is a pixel-dependent first offset, g is a pixel-independent first function and c.sub.t is a pixel-independent second offset.

A method for corrected depth measurement with a time-of-flight camera using amplitude-modulated continuous light. In order to enable an accurate and efficient depth measurement with a time-of-flight camera, the method includes, for each of a plurality of pixels of a sensor array of the camera: acquiring with the camera a raw depth value r.sub.m for the pixel; and automatically calculating a ground truth value r.sub.t according to: r.sub.t=g(r.sub.m−c.sub.m)+c.sub.t, to correct a systematic depth error of the raw depth value r.sub.m, wherein c.sub.m is a pixel-dependent first offset, g is a pixel-independent first function and c.sub.t is a pixel-independent second offset.

Systems and methods for a lower energy/faster time of flight camera system configured to measure distance to an object. The system is configured to emit laser light modulated with a first frequency and image light reflected by an object in order to determine a first phase difference between the emitted and reflected light. The system emits laser light modulated with a second frequency and images light reflected by the object to determine a second phase difference between the emitted and reflected light. The distance to the object is determined using the first and second phase differences. The system is arranged to operate at lower energy for obtaining the first phase difference compared with the operation to obtain the second phase difference. This results in lower overall energy consumption and faster overall operation without any significant reduction in accuracy of imaging.