Abstract: An endoscope includes an elongated tube. An objective lens system is disposed in the elongated tube, for passing image light from an object. A fiber optic image guide includes plural optical fibers bundled together, has a distal tip, is inserted through the elongated tube, for transmitting the image light focused on the distal tip by the objective lens system in a proximal direction. A displacing device displaces the distal tip laterally and periodically upon receiving entry of the image light being focused by use of a piezoelectric actuator positioned outside the distal tip. Plural shifted images are created by the fine displacement, and registered together by image registration, and combined as a synthesized image of up-sampling. Preferably, an evaluator retrieves information of relative position, which is used for error correction of the shifted images.

Abstract: A cage consists of a pressed annular metal cage member (6) and one or two molded plastic roller retaining member(s) (10). Each roller retaining member (10) includes a cylindrical part having pockets for receiving a bearing roller (3) and an annular flange or flanges (8) formed either on only one axial end or on both axial ends of the cylindrical part. Each roller retaining member comprises an annular ring portion (11) having an annular side face engaged by an annular outside face of the flange (8) of the case member, (6) and an annular fitting face 17 to be lightly engaged with or spaced apart by a slight gap from either a radially inner face or outer face of the flange. Teeth (12) transversely project between the rollers (3) for preventing slipping out of any bearing roller. A plurality of lips for coupling and locking the roller retaining member to the flange of cage member (6) are, also, formed on the ring portion.