Patent ID: 8829890

Claim:
An optical voltage sensor, comprising: a polarizing optical system disposed perpendicular to an optical axis of incoming light from a light source, having the optical axis as a center axis thereof, and configured for polarization of incoming light to a prescribed reference state; an electro-optical device disposed perpendicular to the optical axis, having the optical axis as a center axis thereof, and adapted, as a voltage to be measured is imposed thereon, to respond to the imposed voltage by polarizing light polarized by the polarizing optical system; and an analyzer disposed perpendicular to the optical axis, having the optical axis as a center axis thereof, and adapted, as light polarized by the electro-optical device is input thereto, to output the light polarized by the electro-optical device to a connected detector; and frames shaped cylindrical and hollow-tubular, wherein the polarizing optical system, the electro-optical device, and the analyzer are respectively secured inside hollows of the frames with elastic bodies in between, the elastic bodies include soft portions and hard portions distributed in the elastic bodies, and the center axes of the polarizing optical system, the electro-optical device, and the analyzer coincide with a straight line formed by center axes of the frames.