An electro-optical scanning unit consisting of a linear LED array (1) and a linear lens array (2) for imaging slitwise onto a photoconductive drum (4) light emitted by the LED's.
A holder (14, 15) for the lens array (2) is connected by leaf springs (30, 31) to a holder (7) for the LED array (1).
The leaf springs (30, 31) connect the holders (14, 15; 7) in the middle of the arrays (1, 2) and at some distances therefrom and permit adjustment of the lens array (2) in a direction (Y-direction) perpendicular to the optical axis plane of the lens array (2) and in a direction (Z-direction) parallel to said optical axis plane.
The lens holder consists of two parts (14, 15) which are glued to the lens array (2) and which together form a diaphragm for the lens array (2).