Abstract: A microscope equipped with a micro manipulator comprising a pipe for setting a needle therein, a pipe holder for holding said pipe, a condenser lens having a run-through slot formed along the optical axis for passing a needle therethrough and a condenser lens holder for holding said condenser lens, said pipe holder being so constructed as to be shifted for a definite distance along the optical axis and thereafter rotatable, and said pipe holder and condenser lens holder being so constructed as to be shiftable for a definite distance along the optical axis and thereafter rotatable integrally, whereby needles and culture dishes on the stage can easily be exchanged with others.

Abstract: In an angioscope for observing the condition of a blood vessel, a microscope comprises an optical system for forming a blood vessel or vascular image illuminated by a reflecting illumination device on a camera tube; a monitor device for magnifying and projecting the vascular image formed on the camera tube onto the screen of a television receiver by known magnification; a size measuring means for projecting on the screen of the monitor a size measuring index with magnification proportional to the magnification of the vascular image by utilizing the steps of superimposing the index upon the vascular image projected on the screen of the television monitor, relatively displacing the index from the vascular image, and measuring a size of a blood vessel from a size of the index and the magnification; and/or a flow rate arithmetic monitor device for calculating a flow rate of the blood flowing through the blood vessel by detecting the time required for movement of a red blood cell in the blood vessel projected on t