Standard of flatness: its application to Fabry-Perot interferometers.
This article briefly describes the first attempts to make liquid and solid standard flats. The plane surface of 100-mm diameter polished on a cylindrical block of CER-VIT does not show any difference greater than lambda/270 with respect to a perfect plane over a circle of 70-mm diameter. After one year of use no deformation has been observed.
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JP
Marioge
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B
Bonino
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Mullot