November 2004

CARS Microscopy for Biology and Medicine

Eric O. Potma and X. Sunney Xie

The key requirements imposed on optical imaging techniques for the visualization of living biological specimens are noninvasiveness, chemical selectivity and high sensitivity. Coherent anti-Stokes Raman scattering (CARS) microscopy, which meets all three requirements, casts a new light on vibrational microscopy and paves the way for exciting new applications.


Polymers in the Light Path

Researchers have experimented with polymer components in optical communications primarily because of a perceived cost advantage over alternatives fabricated from high purity silica and glass. Some polymer materials also provide performance advantages in areas such as tunability and polarization sensitivity.

Synthetic Aperture Radar

Optics and synthetic aperture radar (SAR) share a history that dates from the earliest efforts in the field of coherent radar imaging. Technological advances have allowed a leap in the utility of SAR as a remote sensing instrument, so that today its effectiveness can rival that of electro-optical/infrared systems.

Department of Defense Contributions To U.S. Science and Technology

Since the end of World War II, the Department of Defense (DoD) has played an important role in supporting U.S. science and technology. The author describes how his career has benefited from involvement with DoD managers and the impetus provided by DoD funding of basic research.

Simple Principles of the Talbot Effect

A well known optics phenomenon finds new applications in emerging fields, including optical computing and optical measurement.

 

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