OSCA is a facility instrument designed to take the output beam from the NAOMI adaptive optics system on the
4.2m William Herschel Telescope. OSCA is a stellar coronagraph which is designed to suppress the light from
bright stars so that fainter astronomical objects and structures can be seen around them. Follow the links on the left to
read more about OSCA.
The institutes involved in OSCA are University College London, Durham University and the Isaac Newton Group.