Feature Of The Week 8/19/12: Recent Results on Miniature OCT MEMS Endoscopes from Korea Advanced Institute of Science and Technology
Optical coherence tomography (OCT) has been intensively studied for advanced bioimaging microscopy. Among the areas for exciting research and commercial opportunities is the miniaturization of endoscopic imaging probes. MEMS technology is of great interest to enable miniaturized laser scanning probes for endoscopic optical biopsy. Below is a summary of some exciting work by the Korea Advanced Institute of Science and Technology (KAIST).
This work reports a fully packaged MEMS endoscopic catheter for forward imaging optical coherence tomography. Two dimensional optical scanning of Lissajous patterns was realized by the orthogonal movement of two commercial aspherical glass lenses laterally mounted on two resonating electrostatic MEMS microstages at low operating voltages. The MEMS lens scanner was integrated on a printed circuit board and packaged with aluminum housing, a gradient index fiber collimator, and an objective lens. A home-built spectral-domain (SD) OCT system with 60 kHz A-line acquisition rate was combined with the endoscopic MEMS catheter. Three dimensional images of 256 x 256 x 995 voxels were directly reconstructed by mapping the A-line data sets along the Lissajous patterns. We believe this work is the first demonstration of lens scanning based OCT endoscopy and this system will be very useful for not only OCT endoscope but also laser scanning based endoscopic modules for CLSM or MPLSM in near future.
For more information see recent Article1 and Article2. Courtesy of Ki-Hun Jeong from the Korea Advanced Institute of Science and Technology (KAIST).