Single Astm 3 Mode and Degenerated Meniscus Form

For a meniscus form, then y = (ti/t2)3 = 1, so the c/b ratio does not depend on Poisson's ratio. In this case one must set b = a since the outer ring vanishes. From (7.22a), the result is as follows.

^ A meniscus form of aperture 2a provides a pure third-order astigmatic flexure Astm 3 by requiring only four alternatively opposite forces Fc,k applied to the ends of folded arms at the radial distance c such as cc1

With km = 4, the general geometry of a vase or meniscus form satisfying the condition Fa,k = 0, only uses Fc,k forces applied to the extremities of four folded arms (Fig. 7.5).

0 0

Post a comment