The package below has been updated at tug.ctan.org and should within a day be at your favorite mirror.

Thank you, Jim Hefferon Saint Michael's College

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The following information was provided by our fellow contributor:

Name of contribution: pst-diffraction Author's name: Herbert Voss Location on CTAN: /graphics/pstricks/contrib/pst-diffraction/ Summary description: patterns for monochromatic light License type: lppl

Announcement text: ---------------------------------------------------------------------- This package enables the user to draw the diffraction patterns for different geometric forms of apertures for monochromatic light. The aperture stops can have rectangular, circular or triangular openings.

This new version allows three dimensional views of the light patterns. ----------------------------------------------------------------------

This package is located at http://tug.ctan.org/tex-archive/graphics/pstricks/contrib/pst-diffraction/ . More information is at http://tug.ctan.org/pkg/pst-diffraction (if the package is new it may take a day for that information to appear). We are supported by the TeX Users Group http://www.tug.org . Please join a users group; see http://www.tug.org/usergroups.html .