Abstract

Infrared radiation scattered from a shallow groove is found to exhibit the same diffraction pattern as a single slit. A model based on a beam with a Gaussian intensity profile was found which explains the observed scattering patterns and which also describes the scattering pattern occurring when certain alignment errors are present in the system. The large scattering intensity from the shallow (depth ∼λ/20) groove has implications in the use of optical scattering as a tool for nondestructive evaluation of surface flaws.

© 1981 Optical Society of America

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