Voltage measurement device

Abstract

Abstract PURPOSE:To make it possible to completely eliminate irregular variation in optical output due to change in temperature by connecting conductive films provided on the Z faces of individual electro-optical crystals. CONSTITUTION:The Z face of a single crystal 1 of LiNbO3 is provided with transparent electrodes 7 and 7', and those transparent electrodes 7 and 7' are mutually connected electrically by a gold lead wire 8. On the other hand for the single crystal 1 that is cut in the direction perpendicular to the Z direction an electric field from electrodes 3 and 3' is applied in the direction of the X axis and when a laser light 2 is passed in the direction that is parallel to the Z axis through a deflector 4, the intensity of output of the laser light 2 that is output from the single crystal 1 through a 1/4 wave length plate 6 and a light detection element 5 varies in accordance with the applied voltage that is applied to the single crystal. Accordingly voltage is measured by this intensity of output. In this way in which the electrodes 7 and 7' are electrically connected, electric charges generated by change in temperature of the Z faces of a single crystal of LiNbO3 can be mutually nullified, and thereby generation of electric field that causes error in the measurement due to electric charge can be prevented.

Inventors

• 👤 Tetsuo Taniuchi

Bibliographic Details