Scanning mirror assembly with torsion springs designed to improve non-linearity
AssigneeBeijing Voyager Technology Co., Ltd.
InventorsYoumin Wang, Yufeng Wang, Qin Zhou, Gary Li
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Abstract
Embodiments of the disclosure provide a scanning mirror assembly for an optical sensing system. The scanning mirror assembly may include a scanning mirror configured to rotate around an axis of rotation. The scanning mirror assembly may further include a plurality of torsion springs coupled to at least one side of the scanning mirror along the axis of rotation. In certain aspects, the plurality of torsion springs may collectively have a non-linear spring constant and a linear spring constant. In certain other aspects, a ratio of the non-linear spring constant over the linear spring constant may meet a predetermined threshold.
Claims20
A scanning mirror assembly for an optical sensing system, comprising:
- a scanning mirror configured to rotate around an axis of rotation;
- and
- a plurality of torsion springs coupled to at least one side of the scanning mirror along the axis of rotation,
- wherein the plurality of torsion springs collectively have a non-linear spring constant and a linear spring constant, and
- wherein a ratio of the non-linear spring constant over the linear spring constant meets a predetermined threshold.
An optical sensing system, comprising:
- a laser emitter configured to emit optical signals;
- a scanning mirror assembly configured to reflect the optical signals towards one or more directions to an environment, the scanning mirror assembly comprising:
- a scanning mirror configured to rotate around an axis of rotation;
- and
- a plurality of torsion springs coupled to at least one side of the scanning mirror along the axis of rotation,
- a receiver configured to receive at least a portion of the optical signals returning from the environment,
- wherein the plurality of torsion springs collectively have a non-linear spring constant and a linear spring constant, and
- wherein a ratio of the non-linear spring constant over the linear spring constant meets a predetermined threshold.
A method of assembling a scanning mirror assembly, comprising:
- coupling a scanning mirror to a gimbal to allow the scanning mirror to rotate around an axis of rotation;
- and
- coupling a plurality of torsion springs to one side of the scanning mirror along the axis of rotation with predetermined gaps therebetween and at predetermined orientations,
- wherein the plurality of torsion springs collectively have a non-linear spring constant and a linear spring constant,
- wherein a ratio of the non-linear spring constant over the linear spring constant exceeds a predetermined a threshold.
Dependencies are inferred from the claim text.