View of the 8.2 m Subaru infrared telescope in Hawaii (from http://SubaruTelescope.org/Index.html), printed with permission of NAOJ. |
 |
Active tip/tilt mirror for the Subaru Telescope (Mauna Kea, Hawaii). Mirror diameter: 150 mm. Tip/tilt range: ±600 µrad. Resonant frequency: 610 Hz |
|
Active tip/tilt mirror for the Subaru telescope, rear view. |
|
Active tip/tilt mirror for the United Kingdom infrared telescope (UKIRT) on Mauna Kea, Hawaii with Secondary Hexapod 6-D alignment system (more information on Hexapod systems).
Mirror diameter: 314 mm
Tip/tilt range: ±500 µrad
Resonant frequency: 280 Hz |
Active secondary mirror for NASA Infrared Telescope Facility (IRTF) on Mauna Kea, Hawaii,with Hexapod 6-D alignment system (more information on Hexapod systems).
Mirror diameter: 244 mm
Tip/tilt range: ±250 µrad
Resonant frequency: 490 Hz |
|
Active tip/tilt mirror system for the Keck Outrigger telescope in Hawaii. The units are controlled by a high-performance digital controller with a fiber optic interface (not shown).
Mirror diameter: 250 mm
Tip/tilt range: ±150 µrad
Resolution: nanoradian range
Position measurement: capacitive |
|
Active secondary tip/tilt mirror for the 2.2 m ESO (European Southern Observatory) telescope in La Silla, Chile.
Mirror diameter: 100 mm
Tip/tilt range: ±400 µrad
Resonant frequency: 900 Hz |
|
Telescope structure with active secondary mirror (from "Progress Report on DISCO: A Project for Image Stabilization at the 2.2 m Telescope," F. Maaswinkel, S. D'Odorico and G. Huster, ESO, F. Bortoletto, Istituto di Astronomia, University of Padova, Italy). |
