| 摘要 |
<p>PROBLEM TO BE SOLVED: To achieve a reliable measurement from high to low frequency regions by eliminating such influence as the grounding, signal routing, and further probe capacitance which have been the problems in a conventional measurement probe and by the similar easiness of handing of a conventional measurement probe of an oscilloscope. SOLUTION: A voltage to be measured is applied to an electrode 45 of an optical modulator 4, the intensity of light which is changed by the optical modulator 4 while depending on the voltage to be measured is converted to an electrical signal by a photodetector 8, and the electrical signal is measured by an asymmetrical measuring instrument 12. The electrode 45 is constituted of a plurality of split electrodes 45a-45b which are divided in light-advancing direction and are mutually capacitively-coupled.</p> |
