Fine-error-sensor camera designs and performance for the Lyman Far Ultraviolet Spectrographic Explorer telescope

The Lyman Far Ultraviolet Spectrographic Explorer telescope is a glancing-incidence type with a highly curved focal surface. Because the instrument is required to guide on stars in the visible range fainter than m(v) = 16 over at least a 10-arcmin field, it is necessary to reimage the field to one, which is sufficiently flat and of appropriate scale for registration by a CCD. We present two camera designs that satisfy this requirement and discuss their overall performance.