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Variable phase grating optical aberrator

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Abstract

We have developed and analyzed a heated laminar airflow device which introduces easily varied aberrations into optical beam trains. The aberrator produced nearly sinusoidal optical path differences of modulation 0 to 2λ (peak to valley) at a 355-nm wavelength and a spatial frequency of ~2 cycles/cm. The phase depth modulation was measured via lateral shearing interferometry and agreed with a sinusoidal near field phase to ~10%. The far field intensity profile was in qualitative agreement with the theory of focused model sinusoidal phase gratings.

© 1988 Optical Society of America

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