Study on supporting force sensing and control during large aperture space mirror test

Structural Optimization of Space Mirror Assembly to Minimize Mass and to Constrain Optical Aberrations

“…Even though defocus can be compensated by adjusting the distance between mirrors, magnification and field of view of the optical system are affected. Hence, it helps if defocus is controlled by mirror design and can be avoided altogether [12]. This leaves us with only three surface errors, namely defocus, coma and astigmatism that correspond to distortions of order 3 or lower and can be controlled by Mirror-MFD design [8].…”

“…3. The symmetry constraint is introduced to accommodate inertial loading along any in-plane direction [12].…”