| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a direct-current voltage measurement device in which electric insulation is easily ensured.SOLUTION: A direct-current voltage measurement device according to an embodiment includes: an electro-optic crystal having first and second surfaces which are arranged on sides opposite to each other; first and second conductive layers being in close contact with the first and second surfaces, respectively, and transmitting infrared light; application means for applying a direct-current voltage across the first and second conductive layers; a light source for causing infrared light to be incident on the first conductive layer; and a light receiving part for receiving the infrared light incident on the first conductive layer, passing through the electro-optic crystal and emitted from the second conductive layer.</p> |
