Lunar Orbiter Readout

Abstract

The photographic system of the Lunar Orbiter is required to convert the developed lunar scene images into equivalent time-varying video signals. The conversion must be such that the lunar images can be faithfully reconstructed on earth from the video signals with a minimum loss of information (resolution). The design effort of the Readout portion of the Photo System was directed toward meeting these requirements within the limitations imposed on size, weight, power consumption and heat dissipation. The major elements of the Readout Subsystem are briefly described, together with a discussion of special features such as video pre-emphasis, synchronizing techniques, and commandable gain and focus adjustments. Concept and design problem areas and their solutions are described. In addition, areas where potential improvements can be realized are discussed.