Experiments with Sensitive Detectors of Ultra-Violet and Infra-Red Radiations

摘要

This report presents, 1) discussion of experiments with fluorescent telescope reception of ultra-violet radiation, described in reference (a); 2)experiments with new photoelectric tube counter receivers of ultraviolet radiations; 3) experiments with photoelectric cell receivers of ultra-violet, visible and infra-red radiations. The report is therefore a preliminary experimental survey of modern methods of detecting the various radiations for the purpose of determining adaptability to signalling, recognition, etc. All of the methods and devices investigated were electrically and mechanically stable, and in this respect possessed the primary characteristics essential to shipboard installation. The conclusion is reached that under conditions at sea, ranges greater than a few miles appear difficult to achieve, and projected adaptation of the devices must contemplate such a limitation.