公开(公告)号：US20230090636A1

公开(公告)日：2023-03-23

申请号：US17479345

申请日：2021-09-20

Applicant: STMicroelectronics LTD ,  STMicroelectronics S.r.l.

Inventor： Alex DOMNITS ,  Elan ROTH ,  Davide TERZI ,  Luca MOLINARI ,  Marco BOSCHI

IPC: G03B21/14 ,  G03B21/00 ,  G03B21/20 ,  G01J1/02 ,  G01J1/44

Abstract: A scanning laser projector includes an optical module and projection engine. The optical module includes a laser generator outputting a laser beam, and a movable mirror scanning the laser beam across an exit window defined through the housing in a scanning pattern wider than the exit window such that the laser beam is directed through the exit window in a projection pattern that is smaller than and within the scanning pattern. A first light detector is positioned about a periphery of the exit window such that as the movable mirror scans the laser beam in the scan pattern, at a point in the scan pattern where the laser beam is scanned across an interior of the housing and not through the exit window, the laser beam impinges upon the first light detector. The projection engine adjusts driving of the movable mirror based upon output from the first light detector.

公开(公告)号：US20230092956A1

公开(公告)日：2023-03-23

申请号：US17979363

申请日：2022-11-02

Applicant: STMicroelectronics LTD ,  STMicroelectronics S.r.l.

Inventor： Alex DOMNITS ,  Elan ROTH ,  Davide TERZI ,  Luca MOLINARI ,  Marco BOSCHI

IPC: G03B21/14 ,  G03B21/20 ,  G01J1/02 ,  G01J1/44 ,  G03B21/00

Abstract: A scanning laser projector includes an optical module with a housing defined by a top surface, a bottom surface, and sidewalls extending between the top surface and bottom surface to define an interior compartment within the housing. A given one of the sidewalls has an exit window defined therein. A first light detector is positioned at an interior surface of the given one of the sidewalls about a periphery of the exit window. A second light detector positioned at the interior surface of the given one of the sidewalls about the periphery of the exit window and on a different side thereof than the first light detector.

公开(公告)号：US20200003879A1

公开(公告)日：2020-01-02

申请号：US16025499

申请日：2018-07-02

Applicant: STMicroelectronics Ltd

Inventor： Guy AMOR ,  Tzvi PHILIPP ,  Elan ROTH

IPC: G01S7/499 ,  G01S7/481 ,  G01S17/08

Abstract: A laser ranging system includes a light source emitting a beam of collimated light. A beam splitter polarizes the beam with a first type of linear polarization. A wave plate receives the beam from the beam splitter and polarizes the beam with a circular polarization. A movable mirror scans the beam across a target, receives a return beam from the target, and reflects the return beam toward the wave plate. The wave plate polarizes the return beam with a second type of linear polarization. The beam splitter receives the return beam from the wave plate. A detector detects arrival of the return beam from the beam splitter. A circuit receives determines a distance to the target as a function of a time interval between emission of the beam and arrival of the return beam.