The invention is directed to a manipulator for an optical apparatus including
a particle-optical apparatus. The manipulator is especially a diaphragm or specimen
manipulator in an electron microscope. The component (4), which is to manipulated,
is accommodated by a transfer body (2) movable relative to a spatially-fixed
component (1) and the transfer body (2) includes a composite material
having a high thermal conductivity while simultaneously having a vanishing or negative
thermal expansion coefficient in the direction of the connecting axis (BB)
between the component (4) and the spatially-fixed component (1).
