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Measuring Up: From Aspheres to Education

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MICHAEL D. WHEELER, MANAGING EDITOR, michael.wheeler@photonics.com

The first lenses shown to have aspheric surfaces were discovered in several Viking graves on the island of Gotland in Sweden. Known as the Visby lenses, the rock crystal lenses date to the 11th or 12th century, according to “The Eye in History” by Frank Joseph Goes. It’s not...Read full article

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