Abstract: A microscope which comprises a main unit comprising a base, an arm body mounted on and fixed to the base, an arm top, a revolver attached to the arm top, an objective attached to the revolver, a lens barrel held by the arm top, and an eyepiece attached to the lens barrel, a stage for supporting a specimen, a movable member connected to the front of the arm body, opposing the specimen supported on the stage, and capable of moving in a vertical direction, a revolver/ stage holder attached to the movable member, for holding the revolver or the stage, a focus adjustment knob coupled to the arm body, a focus-adjusting mechanism located within the arm body and mechanically connected to the movable member and the focus adjustment knob, for moving the movable member in the vertical direction for a distance proportional to an angle through which the knob is rotated, a first revolver holder secured to the arm top, for holding the revolver, and a stage support to be mounted on the base in the case where the objective is

Abstract: A mirror and system for wavefront control includes a piezoelectrically active pellicle with a conductive front mirror surface, and an electron gun for depositing charge on the rear surface of the pellicle. The pellicle is formed of facing plies of polyvinylidene fluoride having opposite poling, so that efficient bimorph actuation is achieved while maintaining substantially constant pellicle thickness and stable x-y planar position coordinates. A phase corrector plate provides a fixed flatness correction for irregularities of the mirror surface, and an initial charge distribution is applied to achieve a reference mirror contour. Potentials above and below a front surface reference potential, and different frame rates, are achieved by controlling the electron energy to selectively charge by primary or secondary charging processes. A feedback system may establish the initial reference contour, and thereafter effect real time wavefront adjustment of a beam reflected from the front mirror surface.

Abstract: A sterile disposable arthroscopy camera cover made from tubular film folded onto itself and forming a package including a plurality of folded layers of film. One end portion of the tubular film extends into and through the other end portion of the tubular film and in the direction of the other end so that the two tubular film ends are located at the same side of the film package. The folded layers which comprise the package may extend in the direction of the tubular film axis or transversely of the axis.

Abstract: A lens focusing mechanism 10 including a bracket 18 for retaining a lens 14. The bracket 18 has a bearing 22 attached thereto or integral therewith. The bearing 22 is eccentric relative to the leans 14 and is effective to move the lens 14 along an optical axis 16 thereof. Movement is effectuated by a drive mechanism 34 in a smooth manner and without lubrication. In a specific embodiment, the bearing 22 is eccentric and external to a cylindrical volume defined by the periphery of the lens 14.