Imaging photon counting system for the extreme ultraviolet(EUV)

We describe an imaging photon counting system for the EUV and its application to the measurement of the imaging quality of CDS EUV telescope for SOHO. The detector system uses an open window micro-channel plate intensifier coupled to a CCD with a fiber-optic taper. The digitized data are processed using a transputer based processing system which resolves the channel pores in the front micro-channel plate. The pores are used to register the EUV image. Dithering of the detector is used to enhance the resolution.