INFRARED EMITTING PHOSPHORS.
Abstract
The purpose of this investigation has been to find and develop phosphors, particularly for the infrared region which can be excited by cathode rays. The emphasis has therefore been pre dominantly on infrared rather than visible emission phosphors. In particular (1) an early assessment has been possible for optimum phosphors in the photographic sensitivity region excited by electrons; (2) infrared phosphors have been made and studied under photon and electron excitation over the range 1-3.5 microns. Esti mates of absolute power conversion efficiencies have been obtained, e.g. 8% for cadmium sulfide emitting at -1 micron and excited by 20 kV electrons; (3) an appraisal of available and optimum phosphors for two specific regions 1.6 and 2.7 microns has been made. The experimental study of infrared phosphors involves specialized techniques which have been developed in the laboratories with special reference to the provision of a versatile demountable cathode ray tube system in which the phosphors can be excited over a wide range of temperatures. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1963
- Accession Number
- AD0417342
Entities
People
- Emil H. Thielens