著者

中川 靖夫 国友 義久

出版者

公益社団法人 応用物理学会

雑誌

応用物理 (ISSN:03698009)

巻号頁・発行日

vol.32, no.1, pp.23-29, 1963

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Solarization of various kinds of glass-hard glass of mercury lamp for copying, soda glass, quartz glass etc. -by exposure to ultra-violet rays from a quartz tube mercury lamp is measured and their cut-off characteristic in ultra-violet region is examined with the following results.<br> (1) Some solarization is caused in every sample of glass during the first 20 hours of alto-gether 100 hour exposure to strong ultra-violet rays; during the rest 80 hours, the solarization remains practically unchanged.<br> (2) On the surface of soda glass, a thin white film is formed by 20 hours exposure to the rays, lowering the transmittance because of the film which can be wiped off, leaving the glass not much affected.<br> (3) One way of representing the solarization is to use a diagramatized model of cut-off characteristic of glass.