Pick-off mirror

The CCD-probe with the pick-off mirror that redirects the light from the telescope to StanCam does not have any specific sensors system to assure its accuracy. To check the precision of the system, tests were made with the telescope at different positions and moving the mirror in and out. It was found that the position of stars was repeatable within $\sim$0.5 pixel (0.1 arcsec).

Thomas Augusteijn 2009-01-15