Quick Shot

Evaluating the Grating Tile

July 14, 2009
A grating tile being aligned for evaluation on a Zygo 18-in. phase-shifting interferometer

Full-aperture interferometry is an essential tool in characterizing large-aperture optics for OMEGA and OMEGA EP components. A grating tile manufactured by Plymouth Grating Laboratory (PGL) is shown being aligned for evaluation on a Zygo 18-in. phase-shifting interferometer and is also seen in the high-reflector, flat mirror.

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