An accurate locating device for medical diagnostic device fiber optics probe, comprising a locating cover installed externally the said probe, one side of the front end of locating cover is equipped with a spiral distance-adjusting cradle, which is equipped with two semiconductor laser designators set along isosceles triangle, the front of laser designator is equipped with dark slide, which is equipped with straight joint, the two which is mutually perpendicular. The laser designating direction intersects on the output light direction of the said probe, with the crossing point being cross shape, adjusting the bolt in distance adjusting cradle the slide block will drive the laser designator to shift accurately in same direction or opposite direction, which changes the distance from laser cross point to fiber optics probe surface, adjusting the distance according to the needed distance from the probe surface to detected surface to make the cross point drop on the detected surface, the distance from the probe surface to detected surface is the needed distance. |