Abstract
CLYPOS was the first survey to search for pulsed optical emission from radio pulsars related to young isolated neutron stars. This survey was performed using a stroboscope device coupled to a FOSC on a 2.12 meter telescope. A sample of nearly 30 pulsars was surveyed with no detections of optical pulses down to magnitudes between 20 and 22. This allows to constraint the values for the efficiency to convert rotational energy into visible light between 10^-3 and 10^-7. A similar survey on a 10-meter class telescope, like the Gran Telescopio Canarias, would be extremely more sensitive and highly likely to result in positive detections, allowing ground-based studies the synchrotron spectra of pulsars.
