| US 7,573,625 B2 | ||
| Multiharmonic galvanometric scanning device | ||
| Roger Steven Cannon, Nicholasville, Ky. (US); and Daniel Richard Klemer, Lexington, Ky. (US) | ||
| Assigned to Lexmark International, Inc., Lexington, Ky. (US) | ||
| Filed on Jul. 07, 2005, as Appl. No. 11/176,056. | ||
| Prior Publication US 2007/0008401 A1, Jan. 11, 2007 | ||
| Int. Cl. G02B 26/08 (2006.01) | ||
| U.S. Cl. 359—199.1 [359/199.2; 359/199.3; 359/214.1; 359/215.1; 359/900] | 22 Claims |
| 1. A scanning apparatus comprising:
a light beam;
a multiharmonic oscillator having a plurality of connected oscillating sections, each oscillating section having a resonant
frequency, wherein at least one oscillating section comprises a reflector positioned to intercept the light beam; and
drive electronics configured to move each oscillating section at substantially the oscillating section's resonant frequency,
wherein the connected oscillating sections and the drive electronics are configured to move the reflector in a motion that
approximates a deflection waveform having a substantially non-uniform angular rate of motion,
and wherein the drive electronics comprise a plurality of drive units each configured to separately drive at least one of
the plurality of oscillating sections.
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