Measurements of infrared fluorescence of certain optical materials as stimulated by visible light.
Some ir transmitting materials fluoresce in the near ir spectral region when they are stimulated by visible light. An investigation of twenty-three different optical materials that might be used as elements in ir samples revealed that thirteen of these materials fluoresced to some degree. Quantitative measurements of the fluorescence were made by irradiating disks of the materials on one side with 0.2-W of visible light and measuring the radiance of the other side. Spectral measurements of the fluorescence of some of the samples were also made by use of bandpass interference filters. This fluorescence is of interest in instances where it might diminish the image contrast in instruments or adversely influence calibration.
Rogers
A K
AK
U.S. Naval Ordnance Test Station,China Lake, California 93555, USA.
Olsen
A L
AL
Nichols
L W
LW