Techniques for descan compensation in a FMCW LiDAR system

US11536813B1 · kind B1 · utility

Assignee

• Aeva, Inc. · US

Inventors

• Keith Gagne · Santa Clara, US
• Adrian Cort · San Francisco, US
• Oguzhan Avci · Cupertino, US
• Kevin Pollock · Mountain View, US
• Pierre Hicks · San Francisco, US
• Mina Rezk · Haymarket, US
• Behsan Behzadi · Menlo Park, US
• Gautam Prabhakar · Los Altos, US

Key dates

• Filing date: Jun 16, 2022
• Grant date: Dec 27, 2022
• Expiry date: Jun 16, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S17/58
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A LiDAR system includes an optical subsystem with an optical axis. The optical subsystem includes an optical source to emit an optical beam, a first optical lens to transmit the optical beam, an optical window to reflect a first portion of the optical beam to generate a LO signal, an optical scanner to transmit a second portion of the optical beam to a target to scan the target to generate a target return signal, a second optical lens to transmit the LO signal and the target return signal to a PD, and the PD to mix the target return signal with the LO signal to extract range and velocity information. The LO signal is disposed to be decentered from the optical axis on the second optical lens to increase a percentage of an overlap of the LO signal and the target return signal on a detection plane of the PD.