Chin-Pang-Billy Siu and Mu Chiao
Dept of Mechanical Engineering, The University of British Columbia, Canada
Haishan Zeng, BC Cancer Agency, Canada
This paper presents the design, fabrication and characterization of a magnetically actuated scanning microlens for miniature confocal Near Infrared (NIR) Raman spectroscopy. One of the potential applications could be on non-invasive skin cancer diagnosis. The microlens is comprised of a 20μm thick ferromagnetic nickel platform integrated with a PDMS plano-convex lens with a diameter of 1.25 mm and an effective focal length of 2.0 mm. This work demonstrates a microlens with a scanning angle of ±24° driven by an external AC magnetic field orientated at an angle of 30° from the horizontal rotation axis. A coplanar 152μm scanning range is demonstrated by a 22.2×10-3 Tesla external magnetic field at 197Hz.
