Polishing method for optical elements

A line-contacted polishing method for spherical and planar optical elements, comprising steps of:

• 1) pressing a polishing disc connecting rod (11) into a polishing disc fixing port (21), and fixing with screws (4), in such a manner that no interval exists therebetween;
• 2) sticking a polishing film (3) on a bottom of a polishing disc base with a binding agent, and trimming a curvature radius of the polishing film (3) after the binding agent is solidified;
• 3) during trimming, installing a polishing device (100) on a work piece shaft of a numerical-controlled device, and installing a trimming grinding wheel (5) on a tool shaft of the numerical-controlled device;
• trimming the curvature radius of the polishing film (3) by point-contacting, in such a manner that the curvature radius of the polishing film (3) is identical;
• and
• 4) during utilization, installing the polishing device (100) on the tool shaft of the numerical-controlled device, and installing an unprocessed work piece (6) on the work piece shaft of the numerical-controlled device;
• during polishing, firstly inputting surface forming parameters of an aspheric surface of the unprocessed work piece (6) and size parameters of the polishing device (100) into a processing software, and generating a numerical-controlling file, so as to control the polishing device (100) and the unprocessed work piece (6) by the numerical-controlled device, in such a manner that the polishing device (100) line-contacts with the unprocessed work piece (6) at any processing position;
• wherein during polishing, a contacting trace of a profiling polishing disc base (7) and the unprocessed work piece (6) is a portion of a meridian section curve of the unprocessed work piece (6), which belongs to profiling processing;
• a contacting trace of a cylinder polishing disc base (2) and the unprocessed work piece (6) is a envelope circle, which belongs to generating processing.

A point-contacted polishing method for aspheric optical elements, comprising steps of:

• 1) pressing a polishing disc connecting rod (11) into a polishing disc fixing port (21), and fixing with screws (4), in such a manner that no interval exists;
• 2) sticking a polishing film (3) on an arc-portion at a bottom of a polishing disc base with binding agent, and trimming a curvature radius of the polishing film (3) after the binding agent is solidified;
• 3) during trimming, installing a polishing device (100) on a work piece shaft of a numerical-controlled device, and installing a trimming grinding wheel (5) on a tool shaft of the numerical-controlled device;
• trimming the curvature radius of the polishing film (3) by point-contacting, in such a manner that the curvature radius of the polishing film (3) is identical;
• and
• 4) during utilization, installing the polishing device (100) on the tool shaft of the numerical-controlled device, and installing an unprocessed work piece (6) on the work piece shaft of the numerical-controlled device;
• during polishing, firstly inputting surface forming parameters of an aspheric surface of the unprocessed work piece (6) and size parameters of the polishing device (100) into a processing software, and generating a numerical-controlling file, so as to control the polishing device (100) and the unprocessed work piece (6) by the numerical-controlled device, in such a manner that the polishing device (100) contacts with the unprocessed work piece (6) at a P point of any processing position;
• wherein the P point coincides with an aspheric meridian section curve relative to a moving trace of the unprocessed work piece (6).