Electro-Optical Observations
Wide Field Deep GenII System
These systems use the same Litton 25 mm diameter Generation II image intensifer having an S20 spectral response photocathode producing near visual response, as the deep gen II systems but have an objective lens with a much smaller focal length (and hence much wider field of view). The system (shown below) consists of an objective lens closely mounted to the Gen II intensifer. The intensifier output is captured using a macro lens attached to a COHU model 4910 CCD at the end of the tube assembly. The performance of these systems depends on the objective lens used, but for a typical 25mm f/0.85 lens the field of view is 30x25 degrees to a limiting stellar magnitude near +7.5.
