Abstract: An optical scanner has focusing elements rotatable about a fixed axis. The elements are each mounted on a flexible radially extending suspension arm. A magnet is carried by each arm and passes a coil extending along the path of the elements. Current to the coil is controlled to induce movement of the arm in a direction parallel to the axis of rotation and effect focusing of the elements.

Abstract: An optical scanner has focusing elements rotatable about a fixed axis. The elements are each mounted on a flexible radially extending suspension arm. A magnet is carried by each arm and passes a coil extending along the path of the elements. Current to the coil is controlled to induce movement of the arm in a direction parallel to the axis of rotation and effect focusing of the elements.

Abstract: An optical scanner has a light distributor rotating about an axis spaced from but parallel to the optical axis of at light source. Lenses are mounted on a carrier that rotates about the optical axis. The distributor and carrier rotate a the same angular velocity and are arranged so that the lens and associated distributor move across the media at the same time. By rotating the lens about the optical axis, the scanning beam remains in the central zone of the lens as it passes across the media.

Abstract: An optical scanner has a light distributor rotating about an axis spaced from but parallel to the optical axis of at light source. Lenses are mounted on a carrier that rotates about the optical axis. The distributor and carrier rotate a the same angular velocity and are arranged so that the lens and associated distributor move across the media at the same time. By rotating the lens about the optical axis, the scanning beam remains in the central zone of the lens as it passes across the media.

Abstract: An optical system is provided implementing a field correction apparatus. The system includes a rotating support driven by a motor. A plurality of focussing lenses are circumferentially spaced about the axis of rotation of the support. As the support rotates, each focussing lens successively passes over a record medium in an arcuate path. The support is also provided with a pyramidal distributing mirror having a number of reflecting surfaces. Each reflecting surface of the disturbing mirror is associated with one of the focussing lenses. The pyramidal distributing mirror is mounted on the center of the support and receives an optical beam on one of its reflecting surfaces. The optical beam is conveyed to the reflecting surface associated with the focussing lens passing over the record medium in a plane that includes the axis of rotation of the support. The optical beam is also directed to the reflecting surface at an angle to the axis of rotation.