Optical sectioning techniques using two-photon excitation of fluorescent indicators are central to diverse imaging applications. The limitations of the technique are low speed and undesirable specimen agitation. In our design, highspeed axial scanning is carried out by moving a reference objective to axially displace the focal spot without introducing significant spherical aberration and any agitation of the specimen. Further, the system is configured to allow switching between single spot and

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... ultiple focal spot remote focusing to allow either high dynamic range or high speed imaging. Downloaded From: http://proceedings.spiedigitallibrary.org/pdfaccess.ashx?url=/data/conferences/spiep/91244/ on 03/15/2017 Terms of Use: http://spiedigitallibrary.org/ss/term Proc. of SPIE Vol. 10070 1007005-2 Downloaded From: http://proceedings.spiedigitallibrary.org/pdfaccess.ashx?url=/data/conferences/spiep/91244/ on 03/15/2017 Terms of Use: http://spiedigitallibrary.org/ss/term