Double Rotary Stage for Polarizing Filter

782466:001.26

Optical assembly for a telescope

For the evaluation of signals from an astronomical telescope, a positioning system was required which independently adjusts two filters with high repaetability. Four of these double filter units were again arranged one above the other at a small distance. In order to keep the beam path as short as possible, a low installation height was required.

Driven by flat stepper motors

The rotary units are driven by particularly flat stepper motors, which act on the turntable via a toothed belt. The mounting of the turntable was achieved with very flat thin-section bearings, which were adjusted to each other such that they were backlash-free.
Each double filter unit can be moved sideways. The displacement drive is not shown in the picture; only the nut flange is visible. For the longitudinal drive, a stepper motor was used, which acts on a smoothened recirculating ball screw.

Model 782466:001.26

X

Rx

Ry

Travel

[mm; deg]

55

nx360

nx360

Repeatability unidirectional

[µm; deg]

± 1.4

± 0.014

± 0.014

Repeatability bidirectional

[µm; deg]

± 2.5

± 0.028

± 0.028

Max. speed

[mm/s; deg/s]

70 420 420

Max. load

[N]

40

4

4

Motor

SM

SM

SM

Drive

Ball screw

Syncronous Belt

Syncronous Belt


Contact Person for Custom Linear Modules

Dipl.-Ing. Elger Matthes

Phone: +49 (0) 351 88585-0

elger.matthes(at)steinmeyer.com