Hi Dale, Saturday, April 12, 2008, 5:57:08 AM, you wrote: DE> using OpenFringe... The RMS error is 1/21 wave and the DE> strehl is .92. Zemax is considerably less optimistic. On axis spot size is 17um RMS with a 6.7um Airy disk. On axis Strehl is 0.25. -- Best regards, Richard in the UK _______________________________________________ ATM mailing list http://www.atmlist.net/