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MARECHAL CRITERION [1 record]
Record 1 - internal organization data 2004-02-10
Record 1, English
Record 1, Subject field(s)
- Optics
Record 1, Main entry term, English
- Marechal criterion
1, record 1, English, Marechal%20criterion
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Once the normalized intensity at diffraction focus has been determined, the quality of the optical system may be ascertained using the Marechal criterion. The Marechal criterion states that a system is regarded as well corrected if the normalized intensity at diffraction focus is greater than or equal to 0.8, which corresponds to an rms wavefront error [lambda]/14. 1, record 1, English, - Marechal%20criterion
Record 1, French
Record 1, Domaine(s)
- Optique
Record 1, Main entry term, French
- critère de Maréchal
1, record 1, French, crit%C3%A8re%20de%20Mar%C3%A9chal
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Contrairement à ce que l'on pourrait croire, un miroir qui satisfait au critère de Rayleigh est un très bon miroir. [...] D'autres critères existent. Le critère de Maréchal est défini par [lambda]/16 RMS (donc [lambda]/4 PtV). Le critère de Françon est de [lambda]/16 PtV. C'est la limite au-delà de laquelle on ne pourra pas faire la différence avec une optique parfaite. [...] À [lambda]/10 PtV, la pièce est considérée comme un calibre de référence. 2, record 1, French, - crit%C3%A8re%20de%20Mar%C3%A9chal
Record number: 1, Textual support number: 2 CONT
Le test d'Hartmann [...] permet de mesurer les déviations de la surface d'un miroir par rapport à une surface théorique. [...] Lors de l'application de ce test, il est préférable que la qualité optique respecte le critère de Maréchal. 3, record 1, French, - crit%C3%A8re%20de%20Mar%C3%A9chal
Record 1, Spanish
Record 1, Textual support, Spanish
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