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Replication Process

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Replication Process

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Replication is the process of manufacturing optics by transferring the optical surface of a master (or mold) to one or more copies of the surface. The copies, which only approximate the final surface before replication, then take on the precise characteristics of the master surface. Surfaces that are 5 Angstroms smooth or have gratings with 3200 L/mm are routinely reproduced.We will describe the replication process by using as an example, the production of a 1/4 wave concave spherical mirror on an aluminum substrate. The reflective surface will be a thin film of aluminum, over-coated with a dielectric film for protection.

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