Abstract: The coarse/fine adjustment coaxial handle for feeding microscope stage comprises a feed screw shaft, a tubular member rotatably fitted over the feed screw shaft and equipped with a disc plate fixed thereto, a fine adjustment handle rotatably fitted over the tubular member and surrounding the disc plate, a reduction gear mechanism interposed between the feed screw shaft and the fine adjustment knob, a first frictional resistance imparting mechanism for imparting frictional resistance to the tubular member, second frictional resistance imparting mechanism for imparting frictional resistance to the disc plate, and a coarse adjustment handle pivoted to an eccentric position on another disc plate connected to the disc plate. The coarse/fine adjustment coaxial handle permits very fine stage feeding without fail and coarse adjustment smoothly with simple operations.

Abstract: A hard endoscope of oblique view type which provides equal illumination of the range of visibility of the objective optical system. The endoscope has an exterior tubular member with an interior housing member disposed eccentrically within the tubular member and carrying an inspection optical system, with the distal end of the endoscope terminating in an oblique planar surface. Illuminating means are carried between the housing member and the exterior tubular member. In the region of the oblique planar surface, the interior of the tubular member and the exterior of the housing member define a passage for the illuminating means having a generally crescent-shap, or, preferably, two cylindrical surfaces in which the illuminating means are carried to transmit light from the oblique planar surface that will transmit light to produce the image of the illumated object, so that it may be clearly seen by the inspection optical system.