ULTRAVIOLET LIGHT RECEIVING ELEMENT AND METHOD FOR MEASURING DOSE OF ULTRAVIOLET RADIATION

摘要

Disclosed is a novel ultraviolet light receiving element that is selectively sensitive to ultraviolet light.  Also disclosed is a method for measuring the amount of ultraviolet light using the ultraviolet light receiving element. An ultraviolet detecting layer formed of a thin film of a metal fluoride such as cerium fluoride, lithium fluoride, magnesium fluoride, or calcium fluoride is formed on a substrate of silica glass, sapphire or the like.  Further, at least a pair of an anode and a cathode are formed on the ultraviolet detecting layer to prepare an ultraviolet light receiving element.  The electric resistance of the ultraviolet light receiving element changes depending upon the amount of incident ultraviolet light.  Accordingly, the amount of ultraviolet light can be measured by taking out and measuring the change as an electric signal.