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<div><font face="Arial" color="#000000">Seminar on<br>
<b>Modern Optics and Spectroscopy<br>
<br>
<br>
Changhuei Yang</b>,<br>
California Institute of Technology<br>
<br>
<i><b>Lighting ways in Biomedicine<br>
<br>
</b></i>September 25, 2007<br>
<br>
12:00 - 1:00 p.m., Grier Room 34-401<br>
</font><font face="Times" color="#000000"><x-tab>
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<br>
<br>
</font><font face="Arial" color="#000000">Biophotonics is a rapidly
evolving research area aimed at providing new light-based imaging,
diagnostic and therapeutic tools for biologists and clinicians. I will
be talking about two areas of biophotonics research that are occurring
in my lab:<br>
<br>
The Optofluidic Microscope - A microscope the size of Washington's
nose on a quarter, that does not contain any lenses and is yet able to
image with better resolution than a typical microscope. The
application range of this invention is wide: it can change the way
biologists think about and use microscope, it enables clinical
point-of-care blood and urine analysis, and it can improve Third World
heathcare by providing cheap and rugged microscope units.<br>
<br>
Tissue Scattering Suppression by Time Reversal Phase Conjugation - An
approach for turning biological tissues transparent through the use of
holography. Light scattering in tissues may look random but their
trajectories are deterministic. As such, it is possible to create a
situation where light scattered from a tissue will retrace their paths
through the tissue. I will report on our initial findings and point
out a few applications for such a phenomenon</font></div>
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