OEM Slide 2
The Robert Stobie Visible Spectrograph (RSS-VIS) is the first-generation, multi-purpose spectrograph on SALT (SALT is a 10m class telescope situated in Sutherland, South Africa). The Near InfraRed Robert Stobie Spectrograph (RSS-NIR) is a near infrared arm built on the original instrument to extend its capabilities into the near infrared. The versatility of RSS results in a complicated mechanical design. The tip-tilt stage developed by nPoint is used to move the fold mirror within the instrument in order to compensate for any image motion induced by flexure as the instrument (and telescope) tracks the sky.