PURPOSE: To detect the surface potential distribution of a body to be detected by arranging a detection head nearby the body and making laser luminous flux incident.
CONSTITUTION: The laser luminous flux emitted by a laser light source 1 is transmitted through a lens 2, a polarizer 3, and a beam splitter 4 and enters the detection head RH. Here, the detection head RH is constituted by laminating a transparent electrode Et, an optical modulating material layer member PML, and a dielectric mirror DML and varying the thickness of the member PML. Then the member PML is applied with the electric field by the body O, so the laser luminous flux incident on the member PML changes in the states of ordinary light and extraordinary light according to the electric field and the light which is reflected by the mirror DML, passed through the member PML again, and emitted from the electrode Et varies correspondingly to the potential distribution of the charge image of the body O. Then, the emitted light enters an analyzer 6 through a beam splitter 4 and a wavelength plate 5 for light quantity adjustment and converted into an electric signal by a photoelectric converter 7.
| JPS60159383 | [Title of the device] Optical method current measurement device |
| JP2001033490 | OPTICAL CURRENT TRANSFORMER |
| JP2004045196 | OPTICAL CURRENT TRANSFORMER SYSTEM |
NAKAGAKI SHINTARO
SHINONAGA HIROHIKO
ASAKURA TSUTAE
FURUYA MASATO
