Waymo LLC

Gregory Hall

Alexander Zbrozek

Joshua Jones

Blaise Gassend

Jason Paul Watson

The present disclosure relates to systems and methods that provide an accurate angle measurement of a rotatable mirror. An example method includes receiving, from a detector device, a reflected light signal. The reflected light signal is indicative of primary reflection light and secondary reflection light. The primary reflection light corresponds to a first portion of emission light that reflects directly from the reflective surface of the rotatable mirror toward the detector device. The secondary reflection light corresponds to a second portion of emission light that: 1) reflects from the reflective surface of the rotatable mirror toward a secondary mirror surface; 2) reflects from the secondary mirror surface toward the reflective surface of the rotatable mirror; and 3) reflects from the reflective surface of the rotatable mirror toward the detector device. The method also includes determining, based on the reflected light signal, the rotational angle of the rotatable mirror.

Optical sensor for mirror zero angle in a scanning lidar

A method for operating a light detection and ranging (LIDAR) device is provided. The method includes driving, by an LLC resonant power converter, a wireless power signal at a primary winding of a transformer disposed on a first platform. The method includes transmitting the wireless power signal across a gap separating the first platform and a second platform. The second platform is configured to rotate relative to the first platform. The method includes receiving the wireless power signal at a secondary winding of the transformer. The secondary winding is disposed on the second platform. The method includes operating, by the LLC resonant power converter at a unity gain operating point and in an open loop mode without feedback control, a device mounted on the second platform based on the secondary winding receiving the wireless power signal.

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Mountain View, CA, United States of America

Gregory Hall