Integrated mirror motor galvanometer

Patent metadata

Field	Value
Publication number	US-12468017-B2
Application number	US-202117503204-A
Country	US
Kind code	B2
Filing date	Oct 15, 2021
Priority date	Oct 15, 2021
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

Embodiments discussed herein refer to an integrated mirror motor galvanometer. The integrated mirror motor galvanometer repurposes a rotor of a motor to include at least one mirror face that redirects the light pulses interfacing therewith. This way, when the rotor oscillates along its range of rotation, the at least one mirror face also oscillates.

First claim

What is claimed is:

1 . An integrated mirror motor galvanometer comprising:
a first support plate comprising a first mounting interface; a second support plate comprising a second mounting interface; a third support plate comprising a first plurality of magnets; a fourth support plate comprising a second plurality of magnets, wherein the first, second, and fourth support plates are secured to the third support plate; a first spacer member and a second spacer member that couple the third support plate to the fourth support plate; and a mirror rotor assembly secured to the first mounting interface and the second mounting interface, wherein the mirror rotor assembly oscillates about a rotation axis with respect to the first, second, third, and fourth support plates, the mirror rotor assembly comprising:
a mirror rotor member comprising a mirror face; and
an armature that causes the mirror rotor assembly to oscillate about the rotation axis when a drive current is applied thereto.

2 . The integrated mirror motor galvanometer of claim 1 , wherein the third and fourth support plates are parallel to each other, and wherein the first plurality of magnets and the second plurality of magnets provide a magnetic field that surrounds the armature.

3 . The integrated mirror motor galvanometer of claim 1 , wherein the mirror rotor member comprises a plurality of through holes, and wherein the fourth support plate comprises a finger support structure including a plurality of finger members, wherein each finger member of the plurality of finger members is positioned in a respective one of the plurality of through holes, and wherein the second plurality of magnets are arranged on the plurality of finger members.

4 . The integrated mirror motor galvanometer of claim 3 , wherein a first minimum rotation clearance gap exists between the second plurality of magnets residing on a first side of the fourth support plate and a first surface of each of the plurality of through holes, and wherein a second minimum rotation clearance gap exists between a second side of the fourth support plate and a second surface of each of the plurality of through holes.

5 . The integrated mirror motor galvanometer of claim 1 , wherein the mirror rotor member comprises:
a third mounting interface that interfaces with the first mounting interface; and a fourth mounting interface that interfaces with the second mounting interface, wherein the rotational axis passes through the first, second, third, and fourth mounting interfaces.

6 . The integrated mirror motor galvanometer of claim 5 , wherein the third mounting interface comprises a first bearing and the fourth mounting interface comprises a second bearing, and wherein the first mounting interface comprises a first cone configured to interface with the first bearing and the second mounting interface comprises a second cone configured to interface with the second bearing.

7 . The integrated mirror motor galvanometer of claim 1 , wherein the armature comprises a coil winding.

8 . A light detection and ranging (LiDAR) system, comprising:
a beam steering system comprising an integrated mirror motor galvanometer, wherein the integrated mirror motor galvanometer comprises: a first support plate comprising a first mounting interface; a second support plate comprising a second mounting interface; a third support plate comprising a first plurality of magnets; a fourth support plate comprising a second plurality of magnets, wherein the first, second, and fourth support plates are secured to the third support plate; a first spacer member and a second spacer member that couple the third support plate to the fourth support plate; and a mirror rotor assembly secured to the first mounting interface and the second mounting interface, wherein the mirror rotor assembly oscillates about a rotation axis with respect to the first, second, third, and fourth support plates, the mirror rotor assembly comprising:
a mirror rotor member comprising at least one mirror face; and
an armature that causes the mirror rotor assembly to oscillate about the rotation axis when a drive current is applied thereto;
a laser source that supplies a plurality of light pulses to the beam steering system, wherein the beam steering system directs the plurality of light pulses in accordance with a field of view; and a controller coupled to the beam steering system and the laser source, the controller operative to coordinate movement speed of the integrated mirror motor galvanometer with the plurality of light pulses supplied by the laser source.

9 . The LiDAR system of claim 8 , wherein the integrated mirror motor galvanometer comprises:
a motor housing comprising a first plurality of magnets and a second plurality of magnets, wherein the armature is positioned in between the first plurality of magnets and the second plurality of magnets.

10 . The LiDAR system of claim 9 , wherein the controller is operative to control application of a current signal to the armature to control rotational movement of the mirror rotor member.

11 . The LiDAR system of claim 9 , wherein a rotational movement of the mirror rotor member ranges between a first angle and a second angle.

12 . The LiDAR system of claim 9 , wherein the at least one mirror face is a single planar surface.

13 . The LiDAR system of claim 9 , wherein the at least one mirror face comprises two planar surfaces.

14 . An integrated mirror motor galvanometer comprising:
a motor housing comprising a first plurality of magnets and a second plurality of magnets; a mirror rotor assembly rotatably coupled to the motor housing and comprising:
a mirror rotor member comprising
at least one mirror face; and
a plurality of through holes, wherein portions of the motor housing that secure the second plurality of magnets thereto are positioned in respective ones of the plurality of through holes; and

an armature coupled to the mirror rotor member and is positioned in between the first plurality of magnets and the second plurality of magnets.

15 . The integrated mirror motor galvanometer of claim 14 , wherein minimum gap separation exists between the second plurality of magnets and the plurality of through holes to enable the mirror rotor assembly to oscillate within the motor housing.

16 . The integrated mirror motor galvanometer of claim 14 , wherein the motor housing comprises:
a first support plate comprising a first mounting interface coupled to the mirror rotor assembly; a second support plate comprising a second mounting interface coupled to the mirror rotor assembly; a third support plate comprising the first plurality of magnets; and a fourth support plate comprising the second plurality of magnets, wherein the first, second, and fourth support plates are secured to the third support plate.

17 . The integrated mirror motor galvanometer of claim 16 , wherein the motor housing further comprises:
a first spacer member and a second spacer member that couple to the third support plate to the fourth support plate.

18 . The integrated mirror motor galvanometer of claim 14 , wherein the first plurality of magnets and the second plurality of magnets are parallel to each other.

19 . An integrated mirror motor galvanometer comprising:
a first support plate comprising a first mounting interface; a second support plate comprising a second mounting interface; a third support plate comprising a first plurality of magnets; a fourth support plate comprising:

Assignees

• Innovusion Ireland Ltd
• Seyond Inc

Inventors

• Cao Jiayang
• Sun Huitao
• Li Yimin
• Wang Haosen

Classifications

• G02B26/105 Primary

  with one or more pivoting mirrors or galvano-mirrors (G02B26/101 takes precedence) · CPC title

• G01S17/08

  for measuring distance only (indirect measurement G01S17/46; active triangulation systems G01S17/48) · CPC title

• G01S17/32

  using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated · CPC title

• G01S7/4817 Primary

  relating to scanning · CPC title