Abstract
In traditional design, the optical system(Gregorian system) consists of a primary, a secondary and folding plane mirror, which is shown in figure 1. Although the system has the strong point with wide working wavelengths, but it has two main weak points. the first is that the system has large additional polarization that interfere the measurement of the transverse magnetic field by mean of cross talk. The second, the system requires very high precision of mechanical alignment to keep aberrations below 0.1". The optical system of Space Solar Telescope(SST) using a reflect-refractor system(RRS) shown in Figure 2, which is close to a diffraction-limited system over the full field of view, consists of a paraboloidal primary, a collimator lens, two folding mirrors and a imaging lens.
© 1998 Optical Society of America
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