MEMS-based handheld scanning probe with pre-shaped input signals for distortion-free images in Gabor-domain optical coherence microscopy
MEMS-based handheld scanning probe with pre-shaped input signals for distortion-free images in Gabor-domain optical coherence microscopy
复制标题
DOI：
10.1364/oe.24.013365
复制
发表时间：
2016-06-13
期刊：
影响因子：
3.8
通讯作者：
Rolland, Jannick P.
中科院分区：
文献类型：
--
作者：
Cogliati, Andrea;Canavesi, Cristina;Rolland, Jannick P.
High-speed scanning in optical coherence tomography (OCT) often comes with either compromises in image quality, the requirement for post-processing of the acquired images, or both. We report on distortion-free OCT volumetric imaging with a dual-axis micro-electro-mechanical system (MEMS)-based handheld imaging probe. In the context of an imaging probe with optics located between the 2D MEMS and the sample, we report in this paper on how pre-shaped open-loop input signals with tailored non-linear parts were implemented in a custom control board and, unlike the sinusoidal signals typically used for MEMS, achieved real-time distortion-free imaging without post-processing. The MEMS mirror was integrated into a compact, lightweight handheld probe. The MEMS scanner achieved a 12-fold reduction in volume and 17-fold reduction in weight over a previous dual-mirror galvanometer-based scanner. Distortion-free imaging with no post-processing with a Gabor-domain optical coherence microscope (GD-OCM) with 2 mu m axial and lateral resolutions over a field of view of 1 x 1 mm(2) is demonstrated experimentally through volumetric images of a regular microscopic structure, an excised human cornea, and in vivo human skin. (C)2016 Optical Society of America
