Holography: Clearing the Image

On a flight from Amsterdam to Paris in 1965, French Astrophysicist Jacques Blamont had a sad tale to tell his traveling companion. Because of faulty equipment, every photographic plate of groups of stars exposed during a complex and expensive balloon-borne telescope experiment had been hopelessly blurred. The companion, University of Michigan Electrical Engineer George Stroke, was less discouraged. "Don't throw anything away," he urged Blamont. "Give me time and I'll get pictures out of your ruined film."

Stroke, who is now on the faculty of the State University of New York at Stony Brook, is nearly ready to make good...

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