Scanning system for lidar
First Claim
1. A scanning system for lidar comprising:
- a nodding mirror having a nodding axis and a centered position;
a rotary electromagnetic drive configured to rotate the nodding mirror clockwise and counterclockwise about the nodding axis, comprising;
a yoke including a permanent magnet, andan arm including a coil at one end of the arm,wherein the coil is enclosed within the yoke, and an opposite end of the arm is coupled to the nodding mirror, such that movement of the coil within the yoke in response to a current causes the nodding mirror to rotate;
a rotary optical encoder configured to produce an output signal in response to rotation of the nodding mirror; and
control circuitry configured to adjust the current provided to the rotary electromagnetic drive in response to the output signal of the rotary optical encoder, such that the nodding mirror rotates in a reference scan pattern.
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Accused Products
Abstract
The present invention relates to a scanning system optimized for lidar that includes a nodding mirror, a rotary electromagnetic drive, a rotary optical encoder, and control circuitry. The rotary electromagnetic drive includes a yoke incorporating a permanent magnet, and an arm having a coil at one end of the arm. The coil is enclosed within the yoke, and an opposite end of the arm is coupled to the nodding mirror, such that movement of the coil within the yoke in response to a current causes the nodding mirror to rotate. The rotary optical encoder produces an output signal in response to rotation of the nodding mirror, which serves as feedback to the control circuitry. The control circuitry adjusts the current provided to the rotary electromagnetic drive in response to the output signal, such that the nodding mirror rotates in a reference scan pattern.
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Citations
25 Claims
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1. A scanning system for lidar comprising:
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a nodding mirror having a nodding axis and a centered position; a rotary electromagnetic drive configured to rotate the nodding mirror clockwise and counterclockwise about the nodding axis, comprising; a yoke including a permanent magnet, and an arm including a coil at one end of the arm, wherein the coil is enclosed within the yoke, and an opposite end of the arm is coupled to the nodding mirror, such that movement of the coil within the yoke in response to a current causes the nodding mirror to rotate; a rotary optical encoder configured to produce an output signal in response to rotation of the nodding mirror; and control circuitry configured to adjust the current provided to the rotary electromagnetic drive in response to the output signal of the rotary optical encoder, such that the nodding mirror rotates in a reference scan pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification