On Mon, Jun 18, 2012 at 3:57 PM, Larry Colen <[email protected]> wrote:
> This makes me wonder if there were some way to design an aperture so that > there was no knife edge. Perhaps a curved coating of sapphire on the edge of > the blade so that it became progressively more opaque over the distance of > several wavelengths of light. The terms you'll want to use in your searches are "apodizing" or "apodization". For example: http://csastro.org/2009/10/a-do-it-yourself-apodizing-mask/ -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
