Resonant fiber scanner with optical feedback.
The addition of an apertured mirror before the imaging lens is proposed as a method of providing feedback in a single-axis resonant fiber scanner. Reflection at the scan extremities generates timing signals interlaced with back-scattered data, and a phase locked loop and a proportional controller then adjust the drive frequency and amplitude. The capture range and stability of the system are examined. Verification is obtained using a confocal scanner based on mechanically biaxial fiber.
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D003952:Diagnostic Imaging / Q000295:instrumentation*; D004867:Equipment Design; D020342:Finite Element Analysis; D055100:Optical Fibers; D041623:Tomography, Optical Coherence / Q000379:methods*