Patent ID: 8571444

Claim:
A neutralization device comprising: a light emitter configured to emit light that neutralizes an object; a longitudinally extending optical conductor opposed to the object and configured to direct and apply the light to the object, the optical conductor being substantially columnar in a longitudinal direction; and a plurality of diffusion portions disposed on the optical conductor in a zig-zag manner from one end of the optical conductor to the other, and configured to diffuse the light; wherein the optical conductor includes a first end face substantially perpendicular to the longitudinal direction and a second end face opposite to the first end face, the first end face being configured to face the light emitter so as to receive the light emitted by the light emitter; and wherein the first end face, the second end face, and a portion of the optical conductor at which the diffusion portions are formed respectively have first, second, and third diameters, the first diameter being larger than the second and third diameters.