This optic scheme (attached) is supposed to be free from spherical aberrations in output point B. A is input.
I simulated the case, but aberrations was found, is it right ? or I missed something ?
Blue lines is spherical mirrors, Middle blue circle is curvature center both same for lenses.
Arkadily, This is an Offner mirror system known as aberration free in terms of spherical aberration, coma and distortion. But there still remains astigmatism as shown in wavefront analysis of Offner mirror in my attachment. Regards, Shigeo
Arkadiy, Since amount of astigmatism is a function of the object height in Offner mirror system, it is negligibly small for the object point near the optic axis. Change object height to see the difference. Regards, Shigeo
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