High Resolution Endoscopes As Thin As Human Hair?  Fri,
03/15/2013 - 9:11am John Hewitt   Current endoscopes typically
employ either a bundle of optical fibers, or a single fiber
outfitted with a scanning head. The Stanford device, which has
just a single MMF, can be much more compact — at two tenths of a
micron, it is just thicker than a human hair. Previous MMFs,
which conduct light via many different fiber paths, or modes,
 were unable to resolve more features in their field of view
than the number of  modes they possessed. This was due to the
scrambling of the light along the way. By structuring the
illumination with the SLM in a such a way that the modes could
be unscrambled, so to speak, the number of resolvable features
could be increased to four times the number of modes. The
technique also borrows from the relatively new field of random
sampling, which has also led to dramatic increases in the speed
of image recording in MRI scans.  Continue reading...   Share
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