Providing accurate, repeatable positioning in a miniature, low profile and economical package, Aerotech’s MPS-GR series rotary stages are available in two sizes; the 20mm clear aperture MPS50GR and the 30mm MPS75GR. They are suitable for optics, measurement, alignment, inspection and other demanding applications. The stages incorporate precision worm-gear drive and bearing components. They are available with DC servo or stepper motors. The clear aperture allows the series to address applications requiring a through-hole or accommodations to mount an optic, including articulation of beam polarizing lenses, through-holes for cabling or air lines, or vision/camera/inspection applications. The DC servomotors for the stages are equipped with a square-wave rotary encoder and the MPS75GR includes a manual adjustment knob. The rotary stages provide performance of up to 80 arc seconds accuracy, 1 arc second resolution, 6 arc seconds repeatability and 180° per second maximum speed. Top load capacity is 12 kg and tilt error motion is 40 arc seconds. Both stages are available with optional vacuum preparation to 10-6 torr including a vacuum-rated motor/feedback connector. An optional breadboard mounting plate provides direct mounting to both English and metric optical tables and a lens mount option (LMO) permits easy mounting of standard lenses over the stage aperture. It is easy to mount two or more stages together in numerous combinations using standardized mounting patterns with adapter plates and brackets.