The major advantage of CCDs over other detectors
is their high efficiency. The wavelength response for the
types of CCD currently in use on La Palma is shown in Figure
.
The best (thinned) devices have a peak efficiency of about 80 per cent,
whilst the unthinned ones have a peak efficiency
of about 50 per cent.
[ TIFF ]
Figure: Responsive
Quantum Efficiency (RQE) as a function of wavelength for the
Tektronix and EEV CCD detectors most commonly used on the La Palma Telescopes