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start [2017/11/15 04:40]
Jon Daniels 		start [2018/07/22 13:56]
Jon Daniels [The Implementation]
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 ===== The Idea ===== ===== The Idea =====
  
-The //diSPIM// is a flexible and easy-to-use implementation of Selective Plane Illumination Microscopy (//SPIM//) that allows for dual views (//d//) of the sample while mounted on an inverted (//i//) microscope.  The diSPIM was co-developed by the lab of [[http://www.nibib.nih.gov/about-nibib/staff/hari-shroff|Hari Shroff]] at NIH/NIBIB and [[http://www.asiimaging.com/|Applied Scientific Instrumentation]] (ASI).  SPIM is also referred to as [[http://en.wikipedia.org/wiki/Light_sheet_fluorescence_microscopy|light sheet fluorescence microscopy]] or LSFM because it uses a sheet or plane of light to illuminate the sample perpendicular to the imaging direction.+The //diSPIM// is a flexible and easy-to-use implementation of Selective Plane Illumination Microscopy (//SPIM//) that allows for dual views (//d//) of the sample while mounted on an inverted (//i//) microscope (i.e. the SPIM objectives are upright).  The diSPIM was co-developed by the lab of [[http://www.nibib.nih.gov/about-nibib/staff/hari-shroff|Hari Shroff]] at NIH/NIBIB and [[http://www.asiimaging.com/|Applied Scientific Instrumentation]] (ASI).  SPIM is also referred to as [[http://en.wikipedia.org/wiki/Light_sheet_fluorescence_microscopy|light sheet fluorescence microscopy]] or LSFM because it uses a sheet or plane of light to illuminate the sample perpendicular to the imaging direction.
  
 ===== The Implementation ===== ===== The Implementation =====
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 The choice of diSPIM objectives is limited because they must be co-focused without bumping into each other.  The most commonly-used objectives for diSPIM are 40x water-dipping objectives with a NA of 0.8 (Nikon CFI Apo 40XW NIR).  The Olympus 20x/0.5 objective is another possibility((According to the manufacturer's drawings the objectives co-focus exactly when they touch, which also implies zero gap between objective and coverslip. However, in practice they co-focus with a gap comparable to the 40x/0.8, with ~200um between the objective bottom and coverslip.)) as is the Nikon 10x/0.3.  ASI and Special Optics have co-developed an [[http://asiimaging.com/docs/cleared_tissue_objective|custom objective for cleared tissue]] that is suitable for the diSPIM and can image cleared tissue up to 5 mm deep in slab form or within a 12 mm spherical envelope.  Single-sided systems (iSPIM) have much more flexibility because the illumination objective can be a low-NA long-WD objective. The choice of diSPIM objectives is limited because they must be co-focused without bumping into each other.  The most commonly-used objectives for diSPIM are 40x water-dipping objectives with a NA of 0.8 (Nikon CFI Apo 40XW NIR).  The Olympus 20x/0.5 objective is another possibility((According to the manufacturer's drawings the objectives co-focus exactly when they touch, which also implies zero gap between objective and coverslip. However, in practice they co-focus with a gap comparable to the 40x/0.8, with ~200um between the objective bottom and coverslip.)) as is the Nikon 10x/0.3.  ASI and Special Optics have co-developed an [[http://asiimaging.com/docs/cleared_tissue_objective|custom objective for cleared tissue]] that is suitable for the diSPIM and can image cleared tissue up to 5 mm deep in slab form or within a 12 mm spherical envelope.  Single-sided systems (iSPIM) have much more flexibility because the illumination objective can be a low-NA long-WD objective.
  
-Most often sCMOS cameras are used for SPIM imaging.  There are working diSPIM systems with Hamamatsu Flash4, Andor Zyla, and PCO Edge cameras, and support for Photometrics Prime 95B was added May 2017.+Most often sCMOS cameras are used for SPIM imaging.  There are working diSPIM systems with Hamamatsu Flash4, Andor Zyla, PCO Edge, and Photometrics Prime 95B cameras.
  
 ASI makes a compact fiber-coupled 2D galvo or "scanner" which is an integral part of the system. The original version of the scanner creates the light sheet by fast scanning in one axis and moves the sheet through the sample using the other axis ((i.e. the diSPIM is a digital light sheet microscope or DLSM in its original implementation)).  There is also a scanner version with a cylindrical lens for static light sheet generation available. The output of the excitation laser (or laser launch) simply is fed into the scanner; it is helpful to have a 2x1 optical switch or dual-output laser launch so the excitation can all be steered to the scanner in the active light path. ASI makes a compact fiber-coupled 2D galvo or "scanner" which is an integral part of the system. The original version of the scanner creates the light sheet by fast scanning in one axis and moves the sheet through the sample using the other axis ((i.e. the diSPIM is a digital light sheet microscope or DLSM in its original implementation)).  There is also a scanner version with a cylindrical lens for static light sheet generation available. The output of the excitation laser (or laser launch) simply is fed into the scanner; it is helpful to have a 2x1 optical switch or dual-output laser launch so the excitation can all be steered to the scanner in the active light path.

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