ADJUSTMENT DEVICE ON AN OPTICAL UNIT

摘要

An adjusting device for linearly displacing an assembly has a rotary knob rotatable in first and second rotary directions. A gear unit rapidly displaces the assembly in a first linear direction when the rotary knob is rotated in the first rotary direction and slowly displaces the assembly in a second linear direction opposite the first linear direction when the rotary knob is rotated in the second rotary direction over a defined rotation angle.