variable compensator of sphaerischen aberrations of various orders to review the oberflaechenform a asphaerischen mirror and its application.

摘要

The compensator consists mainly of a fixed set of lenses F1, F2 and a moveable set of lenses F3, F4, F5, the two sets having the same optical axis and being placed at a distance from each other. Application particularly to the checking of a telescope mirror. IMAGE