Feature Articles

The Optics of Recycling

Optical technologies, including laser scanning and spectroscopy, can be used to identify and sort recyclable materials in a way that makes efficient use of available natural resources and helps to reduce fossil fuel consumption—all in a cost-effective manner.

by Andreas Nordbryhn
Photography in the American Civil War

One hundred and fifty years ago, a rapidly evolving imaging technology came to a divided nation where citizens were fighting each other on bloody battlefields. The rest, as they say, is history.

by Patricia Daukantas
Freeform Optical Surfaces: A Revolution in Imaging Optical Design

A revolutionary optical surface is the result of developments in the theory of aberrations, techniques in optical system optimization, computation speed, precision fabrication of surfaces without symmetry, and extensions to the range of the surface slopes allowed in optical testing.

by Kevin P. Thompson and Jannick P. Rolland

Departments and Columns

Scatterings
Laser Fabricates Silver Dots in a Polymer Matrix

A team at Harvard University (U.S.A.) has developed a fabrication process that enables the creation of nanostructures patterned in 3-D.

Scatterings
Better Super-Capacitors from Laser-Scribed Graphene

Researchers from the University of California, Los Angeles (U.S.A.) used a common computer optical drive to convert thin layers of graphite oxide into graphene, which was then incorporated into flexible electrochemical capacitors.

Scatterings
Mode-Locking Method Shows Stable Output, Potential for Tiny Lasers

An international team of researchers used a microcavity ring resonator as both a laser filter and mode-locker.

Scatterings
Self-Assembling Microlenses Inspired by Starfish

Scientists in Germany recently made good-quality calcium carbonate microlenses by precipitating them out of solution. They got inspiration a reef-dwelling brittlestar whose body is covered with tiny calcium carbonate lenses that act as the lenses for compound eyes.

Education
How to Build a Thriving Undergrad Physics Program

Undergraduate physics programs introduce students to the wonderful world of optics. This case study from California provides insight into how to strengthen your department and improve recruitment strategies.

ADVERTISEMENT
ADVERTISEMENT

Also in this Issue

President's Message
President’s Message

OSA Awards
2012 OSA Awards

OSA proudly announces the recipients of its 2012 awards and medals. The society has chosen to honor these distinguished individuals because they have exhibited dedication, ingenuity and perseverance in attaining the highest level of achievement in their chosen fields. The OSA Board of Directors approved the awards at its meeting in February. Most of these awards will be presented at Frontiers in Optics, the 96th OSA Annual Meeting, in Rochester, N.Y., U.S.A., in October 2012.

OSA Today
OSA Today

Book Reviews
Book Reviews

Product Profiles
Product Profiles