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Figure 1
An optical module, manufactured at INAF/OAB, made of four stacked pairs of slumped glasses (after Civitani et al., 2013 ). Each pair is a grazing-incidence parabola–hyperbola system operating two reflections in sequence. Ribs are used to properly space the mirrors and to endow them with the required stiffness. |


journal menu![[Figure 1]](xt5004fig1.jpg)




