Patent ID: 11947048
Assignee: WAYMO LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A light detection and ranging (lidar) device comprising:
a first light emitter configured to emit a first light signal;
a second light emitter configured to emit a second light signal;
a transparent substrate;
a first light guide disposed on the transparent substrate, wherein the first light guide is optically coupled to the first light emitter and configured to guide the first light signal from a first input end to a first output end, wherein the first output end comprises a first angled portion configured to direct the first light signal through the transparent substrate and toward an environment surrounding the lidar device;
a second light guide disposed on the transparent substrate, wherein the second light guide is optically coupled to the second light emitter and configured to guide the second light signal from a second input end to a second output end, wherein the second output end comprises a second angled portion configured to direct the second light signal through the transparent substrate and toward the environment surrounding the lidar device;
a first light detector positioned to receive the first light signal upon the first light signal being reflected by a first object in the environment surrounding the lidar device;
a second light detector positioned to receive the second light signal upon the second light signal being reflected by a second object in the environment surrounding the lidar device;
a first wavelength-locking mechanism configured to use a portion of the first light signal to maintain a wavelength of the first light signal; and
a second wavelength-locking mechanism configured to use a portion of the second light signal to maintain a wavelength of the second light signal, wherein the wavelength of the first light signal and the wavelength of the second light signal are different from one another.