Single-body lensed-fiber scanning probe actuated by magnetic force for optical imaging.
We propose a fiber-based hand-held scanning probe suitable for the sample arm of an optical imaging system including optical coherence tomography. To achieve compactness, a single-body lensed-fiber and a solenoid actuator were utilized. The focusing lens of the probe was directly formed onto the distal end of a fiber, which eliminated the need for additional optical components and optical alignment. A ferromagnetic iron bead was glued onto the middle of the fiber to enable actuation by magnetic force, which allowed easy fabrication and good practicality. The fiber piece having the built-in fiber lens was forced to oscillate in its resonant frequency. With the implemented probe, optical coherence tomography images of a human fingertip and a pearl were obtained at an imaging speed of 30 frames/s over a scanning range of 4 mm.
Min
Eun Jung
EJ
Department of Information, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea.
Na
Jihoon
J
Ryu
Seon Young
SY
Lee
Byeong Ha
BH
D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D008280:Magnetics / Q000295:instrumentation / Q000379:methods*; D055100:Optical Fibers; D041623:Tomography, Optical Coherence / Q000295:instrumentation* / Q000379:methods; D014159:Transducers