Microsoft Technology Licensing, LLC

Mike Fenton

Cyrus Soli Bamji

Travis Perry

Michael Anthony Hall

Dawson Yee

Barry Thompson

Zhanping Xu

Matthew D Morris

Algird Michael Gudaitis

Karen Y Cheng

Sunil Prakash Acharya

Andrew Dean Payne

Brock McCray Roland

Larry Prather

A method to calibrate an imaging array of a time-of-flight depth camera includes the act of modulating emission from a light source of the camera while synchronously biasing the imaging array. In this method, the modulated emission reflects from a compact reflector positioned a known distance from the camera and passes through an optical diffuser en route to the imaging array. For each pixel of the imaging array, a correction term is stored, which brings the output from that pixel into agreement with the actual distance between the camera and the compact reflector.

Time-of-flight phase-offset calibration

Embodiments disclosed herein are directed to time-of-flight (TOF) systems, and methods for use therewith, that substantially reduce interference that the TOF system may cause to at least one other system that is configured to wirelessly receive and respond to IR light signals. Some such embodiments involve emitting IR light having a low frequency (LF) power envelope that is shaped to substantially reduce frequency content within at least one frequency range known to be used by at least one other system that may be in close proximity to the TOF system. Such embodiments can also involve detecting at least a portion of the emitted RF modulated IR light that has reflected off one or more objects. A TOF system can produce depth images in dependence on results of the detecting, as well as update an application in dependence on the depth images.

Interference reduction for TOF systems

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Palo Alto, CA, United States of America

Mike Fenton