[MOS] MOS September 25, 2007

[Zina Queen]

Seminar on
Modern Optics and Spectroscopy


Changhuei Yang,
California Institute of Technology

Lighting ways in Biomedicine

September 25, 2007

12:00 - 1:00 p.m., Grier Room 34-401



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:

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.

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
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