Accession Number : AD0754546

Title :   Radioactive Thorium in Glass Lenses of Starlight Scopes.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Kronenberg,S. ; Lux,R. A. ; Ramm,W. J. ; Pfeffer,R. ; Santoro,R.

Report Date : NOV 1972

Pagination or Media Count : 59

Abstract : Scopes.Technical rept.,Kronenberg,S. ;Lux,R. A. ;Ramm,W. J. ;Pfeffer,R. ;Santoro,R. ;ECOM-4045DA-1-T-061102-B-11-A1-T-061102-B-11-A-01(*thorium compounds, radiation hazards), (*image intensifiers(electronics), thorium compounds), (*lenses, thorium compounds), glass, eye, radiation dosage, permissible dosage, protection, ophthalmologylight amplification, *starlight scopesTests performed upon eyepieces of Starlight scopes revealed significant emission of nuclear radiation by radioactive thorium contained in the glass lenses. Quantitative measurements indicated that the dose which would be deposited within the human eye by some lenses can exceed maximum permissible levels. Methods to reduce the dose below these levels are suggested. Pertinent background material on radiation protection regulations, radioactive equilibrium, and ophthalmology is included for reference. (Author)

Descriptors :   (*THORIUM COMPOUNDS, RADIATION HAZARDS), (*IMAGE INTENSIFIERS(ELECTRONICS), THORIUM COMPOUNDS), (*LENSES, THORIUM COMPOUNDS), GLASS, EYE, RADIATION DOSAGE, PERMISSIBLE DOSAGE, PROTECTION, OPHTHALMOLOGY

Subject Categories : Radiobiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE