Abstract

Glass turned violet in color due to long exposure to sunlight is thermoluminescent when heated to temperatures above 100°C. Thermoluminescence was also observed in some samples free from color while others showed no luminescence. Effects similar to those for sunlight were also observed from glasses exposed to the carbon or mercury arc and in some cases for exposures of only a few minutes. Special glasses were made from a chemically pure zinc borate glass to which was added a trace of one of the following metals: barium, calcium, strontium, magnesium, manganese, aluminum, nickel, cobalt, chromium, silver, cerium, thallium, and thorium. Each of the above was exposed to sunlight and tested for thermoluminescence, the most intensely luminescent being thorium, cerium, silver, chromium, cobalt, and manganese. The following curves were determined: growth of luminescence with time of exposure, both for sunlight and the carbon arc; effect of concentration of solute; decay of thermoluminescence and periodic changes of luminescence as dependent upon time after excitation. All light measurements were made with a polarization photometer.

© 1930 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Commercial Glass Transmitting Ultraviolet Light

Paul Davidovich
J. Opt. Soc. Am. 20(11) 627-641 (1930)

The Deflection of Light as Observed at Total Solar Eclipses

Charles Lane Poor
J. Opt. Soc. Am. 20(4) 173-211 (1930)

Quantitative Biological Effects of Monochromatic Ultraviolet Light*

Israel Weinstein
J. Opt. Soc. Am. 20(8) 433-456 (1930)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription