Infrared sensitive zinc sulfide luminophore
Abstract
Abstract A luminophore that is extremely sensitive to both low intensities and very long wavelengths of infrared radiation is described. The luminophore consists of very high purity zinc sulfide crystals that are sensitized to infrared radiation by adding minute quantities of the elements lead, cobalt and praseodymium thereto. The lead, cobalt and praseodymium-activated zinc sulfide crystals, when prepared in a suitable emulsion film, will detect infrared radiation having energies as low as 10 2 electron volts and of wavelengths as long as 15 microns. When first ''''sensitized'''' by ultraviolet light and subsequent illumination by infrared radiation, the luminophores of the invention luminesce, generally within the visible red range of the spectrum, with color gradations all the way out to the blue, depending upon the intensity of infrared radiation received.
Inventors
- 👤 Otto R Kozak
Bibliographic Details
Claims Analysis
Total Claims: 1References Cited (Backward Citations)
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