An optical probe has a tubular outer envelope, and a shaft rotatable about a rotating axis extending longitudinal direction of the outer envelope. A light guide disposed to extend along the shaft is connected to the shaft at its leading end portion, a light deflector connected to the leading end portion of the light guide deflects light radiated from the leading end portion of the light guide, and a collecting lens converges light radiated from the light deflector outside the outer envelope. Light emitted from the light deflector is scanned along the outer envelope in response to movement of the shaft and the light deflector is connected to the shaft in a position deviated from the axis of rotation of the shaft and is movable to the shaft so that the direction of light deflected by the light deflector can be changed in this position.
1. An optical probe comprising
a tubular outer envelope,
a shaft which is rotatable about an axis of rotation extending longitudinal direction of the outer envelope inside the outer envelope,
a light guide means which is disposed inside the outer probe to extend along the shaft and is connected to the shaft at least at its leading end portion,
a light deflecting means which is connected to the leading end portion of the light guide means and deflects light radiated from the leading end portion of the light guide means, and
a collecting lens which converges light radiated from the light deflecting means outside the outer envelope,
wherein the improvement comprises that light emitted from the light deflecting means is rotatively scanned in the direction of circumference of the outer envelope in response to rotation of the shaft and the light deflecting means is connected to the shaft in a position deviated from the axis of rotation of the shaft and is movable relatively to the shaft so that the direction of light deflected by the light deflecting means can be changed in this position.
2. An optical probe as defined in claim 1 in which an optical fiber is employed as the light guide means and the optical fiber connected to the shaft at its leading end portion is movable relatively to the shaft by rotation of the optical fiber about its axis.