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Use of Replica Diffraction Gratings in Space Flights

Volume 21, Number 5 (Oct. 1967) Page 332-332

Paul, Fred W.

In order to make use of the widely recognized advantages of replica gratings (such as low cost, high availability, sometimes improved groove shape, and close similarity between one replica and the next) in space-flight applications, it is important to know how replicas will react to the space environment. Replicas have had very extensive use in short-duration flights, such as sounding rocket experiments. For longer flights, however, such as orbiting observatories, the experimenters have generally specified original rulings. This is because there has been some doubt that replicas will endure long exposures to the rigors of space as well as will original ruled gratings.