Abstract

In a tiled-grating system, it is difficult to make two tiled gratings strictly coplanar. We propose and demonstrate for the first time, as far as we know, a simple method by which the longitudinal piston error between two tiled gratings can be reduced below λ10, close to the influence of the environmental factors. The alignment precision of the method increases with the tiled-grating system’s stability to environmental factors.

© 2007 Optical Society of America

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