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a a where zo is given by (5.28). From the mirror optical shape Zopt in (5.20d), we deduce the equivalences of the semi-axe radii at clear aperture ax = Xm = ym/cos i and ay = ym = rm•

From the identification of U4 coefficients, we obtain ym pzo =

29Q3 cos i'

After substitution of the rigidity and simplifications, the thickness of each plate of the closed form is t = 4Q

This defines the first part of execution conditions, the second is the design of the perimeter elliptic cylinder.

• Closed biplate form - Design of elliptic cylinder contour: At the contour C, and in the x- and y-direction, the bending moment Mn and net shearing forces Vn are

0 0

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