Motorized Aperture Stage
Custom Linear Modules
Highest precision and compact design
The aperture control is used to adjust a pass-through window for a power laser and makes it possible to confine a laser beam to any rectangular format. The pass-through window is formed by means of four individual apertures, which are positioned by two drives. The height and width of the window can be adjusted almost infinitely from fully closed up to a size of 25 x 25 mm (maximum open); the smallest adjustment step is 50 nm. The beam center is fixed and cannot be changed.
Driven by DC motor and precision spindle with belt deflection
Since the pairs of individual apertures must be moved synchronously to adjust the pass-through window, two individual apertures each are moved by one spindle. The aperture control is driven by a DC motor and a precision spindle with belt deflection – a design with advantages: Owing to right-hand and left-hand threads on one spindle, two counter-rotating movements can be generated with one motor. In addition, the flat design requires only a short installation length in the optical beam path. Since the pairs of individual apertures must be moved synchronously to adjust the pass-through window, two individual apertures each are moved by one spindle. In this process, the parallelism of the apertures that are arranged on opposite sides deviates only by a maximum of 10 µm.