摘要:
A polishing device for polishing curved lens faces of optical lenses has a workpiece holder for receiving an optical lens and a polishing tool. The polishing tool has a support element, an elastic substructure and a curved polishing surface on the elastic substructure. The polishing tool, with the polishing surface, is driven in a rotating manner about a rotation axis, the workpiece holder being driven in a rotating manner about a first axis, in order to rotate the optical lens. A distance between the workpiece holder and the polishing tool is adjustable along a second axis. An offset between the workpiece holder and the polishing device is adjustable along a third axis, which is aligned transversely in relation to the first axis. A pitch angle between the rotation axis and the first axis is adjustable by tilting about a fourth axis. A method of operating the device is also disclosed.
摘要:
The optical surface of a lens (21) held and rotated by the rotating shaft (12) of a lathe is cut or ground into an aspherical surface from a direction perpendicular to the axis of the rotating shaft (12) and the axial direction of the rotating shaft (12) while a processing locus (t) which is concentric or spiral about the rotating shaft (12) as the center is formed. In processing, the lens (21) is arranged in a grinding region (20) at a position spaced apart from the turning center (Zo) of the processing locus (t).
摘要:
The invention relates to a method for processing the surfaces of optical workpieces (3) such as optical or eye glass lenses carried out with the aid of a tool (5) and consisting in holding at least one workpiece (3) in a work piece receiving support (4) which is rotatable around the axis of a workpiece spindle (1′). The invention is characterized in that the workpiece (3) is received in the receiving support (4) in such a way that the axis of rotation (2) of the workpiece spindle is placed remotely from the axis (8) of at least one workpiece (3) and the axis (18) of the workpiece support is at least partially in a parallel position to the axis of rotation of the workpiece spindle.
摘要:
Parts having centered spherical surfaces are produced by a method and by a tool which seats an inner spherical end of each part on a very accurately generated spherical surface of the tool while a spherical surface is ground and polished on an outer end of each part. The ground and polished surface is formed concentric with the underlying precisely formed spherical surface of the tool or block. The seating of a part against the spherical surface eliminates problems of tilting of the optical axis of the part.A shell is attached to the spherical surface of the block, and a plurality of openings are drilled through the shell. The sidewalls of the parts are located and supported by the side surfaces of these openings so that the shell holds the parts against any lateral movement during the grinding and polishing operation. As a result the parts can be vigorously ground and polished while being held firmly in a fixed position. A single tool has a large number of openings in the shell.Large volumes of parts are produced with centered surfaces of superior accuracy at low cost.
摘要:
Machine for grinding and polishing workpieces having a spherical surface, such as spectacle glasses, optical lenses, and the like, including a workpiece support disposed for rotation about a generally vertical axis for mounting the workpiece for exposure during the machining operation to the action of a work tool operatively applied under pressure against the workpiece for carrying out such action, the workpiece support having a spherical workpiece receiving surface provided with a predetermined radius of curvature generally corresponding to that of the spherical surface of the workpiece to be operatively mounted thereon and situated such that the center of the radius of curvature coincides with the rotation axis of the workpiece support, a work tool holder such as a pressure spindle sleeve for operatively holding the work tool for carrying out the grinding and polishing action and for maintaining the work tool against the workpiece under the applied pressure, a rocker connected to the work tool holder to form a unit therewith and mounted for reciprocating movement about a pivot axis arranged generally normal to the rotation axis of the workpiece support, and a reciprocating drive such as a crank drive for effecting reciprocating movement of the rocker and work tool holder, in which the reciprocating drive is provided with reciprocating means having an invariable or constant operative amplitude of reciprocating movement such as crank arm means having an invariable operative crank radius and corresponding amplitude of crank reciprocating movement, and in which an intermediate selectively variable drive transmission means is further provided.