British type CV-143 infrared image converter tube
date: label: date made
content: ca 1941
notes: label: Description (Brief)
content: A cylindrical glass tube with window on from, paper label reads: "Made / in / England"; "CV143 / 0509 / 3 5'o". Donor’s card reads: “Infra-red image converter tube, made in England for British use during World War II. When mounted with the necessary equipment on a rifle, targets could be made visible at night. Was referred to as a “snooperscope” tube during the war. In principle the image converter is a system for making visible radiation of wavelengths lying outside the range of the human eye. Several such tube have been developed, but the CV-143 operates with the greatest reliability ad least complications as to power supply. This tube requires a single high voltage source, from 4000 to 6000 volts, whereas other types require three or more voltage sources.”
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.325085
label: catalog number
content: 325085
label: accession number
content: 252994
objectType: label: Object Name
content: Image Converter Tube
label: Object Name
content: image tube
label: Other Terms
content: Image Converter Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 1 3/4 in x 2 in; 4.445 cm x 5.08 cm