Cover Story
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... more>>
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Department of Defense Contributions To U.S. Science and Technology
William Happer
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. more>>
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Polymers in the Light Path
Lawrence W. Shacklette
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. more>>
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Simple Principles of the Talbot Effect
Changhe Zhou, Wei Wang, Enwen Dai and Liren Liu
A well known optics phenomenon finds new applications in emerging fields, including optical computing and optical measurement. more>>
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Synthetic Aperture Radar
Armin W. Doerry and Fred M. Dickey
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. more>>