Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2007-10-30
2011-12-06
Phan, James (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C359S200700
Reexamination Certificate
active
08072663
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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Bruce Robert
Moore William T.
O'Neill James
Williams Kevin
Autonosys Inc.
MacLean Doug
Phan James
Teitelbaum Neil
Teitelbaum & MacLean
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