Visual Requirements, Characteristics and Limitations of Present Visual Devices in Tanks and Means for Improving Sighting Telescopes and Periscopes

摘要

The purpose of the report is to determine the limitations of present periscopes and sighting telescopes and to recommend means for improving them. Recommendations made are: That a better corrected optical system be substituted in the M50 series sight production at the earliest possible time--securing adequate flatness of field and resolving power. That two periscopic dual sights, of the characteristics described in the accompanying drawing be developed. That three telescopic sights of the characteristics given in the attached drawing be developed and manufactured. (Author)