Ten artificial auroral streaks produced by the Echo 4 rocket-borne electron accelerator were recorded with an image orthicon television system. The streaks were viewed normal to their direction along the magnetic field, and the threshold accelerator power necessary for optical imaging was found to be near 1 kW. The observed streaks were all produced by beams injected downward from the rocket directly into the atmosphere. Upward-injected beams of up to 2-kW power did not produce optically observable echo auroras after the hemisphere-to-hemisphere round trip, although echoes were observed by particle counters on the rocket. The failure to observe the echo auroras optically may be the result of strong pitch angle scattering. The positions, orientations, altitudes, and vertical extents of the observed streaks are in satisfactory agreement with model calculations. Some of the streaks had diameters of ~5 times the electron gyroradius. This is the expected collisional spreading for a beam that, above the atmosphere, is confined to a single gyrodiameter. Other streaks, injected from rocket apogee (215 km), exhibited substantial fluctuations in width that are interpreted as evidence for strong beam interactions with the ambient ionosphere.