5 September 2006 Servo-modulator system used in a 2D shearing interferometer
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Abstract
An improvement of a 2D shearing interferometer to measure small and large non-rotationally symmetrical wavefronts aberrations is described. This interferometric system encompasses large and differential wavefront displacements using a high accuracy rotation system incorporated in a Mach-Zehnder interferometer. The rotation of the prism arrangement is controlled with an electronic servomotor system by means of an auto-tuning using a Neural Network Algorithm, NNA. We describe the servo-mechanical system, the electronic interface and algorithms to control the performance of the rotation device with the aim of obtain accurate wave front position by a prism rotator system.
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G. García-Torales, J. L. Flores, J. G. Mateos Suárez, R. X. Muñoz, "Servo-modulator system used in a 2D shearing interferometer", Proc. SPIE 6289, Novel Optical Systems Design and Optimization IX, 628917 (5 September 2006); doi: 10.1117/12.681343; https://doi.org/10.1117/12.681343
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