Abstract

We demonstrate a quadruple-pass lateral shearing interferometer by introducing a single mirror into the conventional double-pass system for collimation-based applications. This interferometer permits the collimation of the double-pass test beam to be evaluated at a self-referencing sensitivity, and at the same time a differential sensitivity in collimation detection can be achieved through the quadruple-pass test beam. The proposed system can be utilized for both refraction-based and reflection-based applications that depend on a test arm with a convergent beam.

© 2014 Optical Society of America

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