Spectrograph, UV, V-2

Black rough conical structure constructed of thick welded steel parts. Two parallel circular metal platforms are mounted perpendicularly on the lower extremity of a rectangular box housing the optics. These support electromechanical gear for the spectrograph and the camera. Small electrical motor with gearing mechanisms and electrical wiring are visible, as are the heavily armored film cassette and the two tiny lithium fluoride entrance apertures. Sunlight from a wide angle entered via one of the two beads, reflected off folding mirrors to a single concave Rowland grating, which dispersed the light and focussed it onto a film strip at the base of the instrument. The clock and gear mechanism advanced the film so that multiple exposures could be taken as the missile moved through and beyond the atmosphere.