L3 CCD Wavefront Sensor Developments at the ING

摘要

The current natural guide star (NGS) wavefront sensor at the ING is based around a conventional CCD39. The read noise of this detector limits the overall AO performance of the system. Simulations have shown that L3 technology could offer a 1 - 2 magnitude guide star limit improvement. We have constructed a new WFS head around an L3 CCD60 detector and integrated it into the NAOMI AO instrument on the William Herschel telescope. The head will eventually find application in the upcoming Rayleigh laser AO system (GLAS) where it will be used as a natural guide star tip-tilt sensor.