21. Januar 2005

Vorbemerkung: Die Entwicklung zu diesem Programm ist fast ausschließlich in
Englisch abgelaufen, sowohl mit dem Programmierer Massimo Ricardi selbst,
wie mit vielen Freunden in Europa oder USA u.a. bei der interferometry
News Group. Mit Rücksicht auf diesen Personenkreis schrieb ich diesen Text
in Englisch. Gruß Wolfgang Rohr

Fringes map and the calculation software

Long time ago Karl-Ludwig Bath an amateur astronomer published
his Bath-Interferometer in "Sterne und Weltraum 6/1973"

http://www.astro-foren.de/index.php?showtopic=1166

This was one of the most important tool for getting quantitativ results
of an optical systems by testing with interferometry in all spectral
colors. The Laser was invented but not payable for a poor astronomer.
So I developed that basic version of that tool and tested many different
optical systems, but at this time, we all missed a professional calculation
software for that fringes pattern. In 2000 Phillipp Keller, Regensburg,
programmed the first calculation software and I was very appreciate to
have one. But it was a basic program, too and some of our amateur
astronomers weren't satisfied and tried to compare our equippement with
a ZYGO phase shift interferometer and the accuracy of that industrial
tool. Nevertheless I compared our testing results with results of a ZYGO.
Our_results were not far from ZYGO's. End of 2003 the shareware FringeXP was
distributed and lots of the experts started to check the former results,
better than a ZYGO can do, they claimed. They waste much time in
sophisticated discussions. The serious astronomers started to work
with fringes map and with this FringesXP, an interesting fringe
calcualting software. But some features in this program were missing
and a user needed additial tools, programmed from any interested
persons in USA, but not Germany. In June 2004 Massimo Ricardi, Italy,
started for his powerfull and high professional software for calculate
fringes pattern. He is a great expert in developing usefull programms
and my part was helping him with my practical experiences. Now he has
finished his first basic version with lots of important features for
checking an optical system by an interferogram. So let me introduce
in that first edition version 1.4.

The first edition works with fringes map produced in autokollimation
or with a compensation system. It works correct with the obstruction
of the fringes map - this is a problem witch the shareware program
fringeXP doesn't solve. The AtmosFringe basic version doesn't support
the calculation auf of the curvature center (COC), but this FringeXP feature
doesn't fulfil the high exspactations, I've had. The results in autocollimations
setup are more exact than in CoC setup by a difference of 1-15 % Strehl points.

The inventor of the Bath-Interferometer Karl-Ludwig Bath, Freiburg

The interferometer tool

The first system: Zeiss APO AS 80/840

fringes map: Zeiss AS 80/840 546.1 nm wave, setup in autokollimation

AtmosFringe - Report / Certificate

AtmosFringe - Image

AtmosFringe - artificial fringes map calculated by Zernike koeffitients

AtmosFringe - date sheet and aberrations

AtmosFringe - Zernike koeffitients

AtmosFringe - wave front

AtmosFringe - wave surface

AtmosFringe - point spread function PSF

AtmosFringe - PSF surface

AtmosFringe - modulations transfer function MTF

AtmosFringe - artificial Foucault

AtmosFringe - user date for the report

The second system:
Newton 256/1242 650 nm wave in autocollimation setup

The fringes map

AtmosFringe - report / Certificate

AtmosFringe - image

AtmosFringe - artificial fringes map

AtmosFringe - wave front

AtmosFringe - PSF

AtmosFringe - MTF

AtmosFringe - artificial Foucault

This program will be distributed by an USA trader and I'm sure,
Massimo Ricardi will inform us about the details.