Polishing device for optical elements and method thereof

A surface-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;
• 2) sticking a polishing film (3) on an arc-portion at a bottom of a cylinder polishing disc base (2) 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 is same with a curvature radius of the spherical or the planar optical element in value and opposite in direction;
• 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 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 precisely position the polishing device (100) and the unprocessed work piece (6) by the numerical-controlled device, in such a manner that a curvature center of the polishing film (3) coincides with a curvature center of the unprocessed work piece (6) at any processing position;
• a surface of the polishing device (100) forms ring-surface-contact with a surface of the unprocessed work piece (6) for polishing.

A polishing device for optical elements, comprising:

• a tool shank (1), and a polishing disc base;
• wherein the tool shank (1) is connected to the polishing disc base and is mounted on a tool shaft of a numerical-controlled processing device;
• wherein a polishing film (3) is stuck on the polishing disc base;
• the polishing disc base is a profiling polishing disc base (7) or a cylinder polishing disc base (2);
• a polishing disc connecting rod (11) is extruded from a bottom of the tool shank (1), for cooperating with a polishing disc fixing port (21) hollowed at a top of the polishing disc base, wherein when the tool shank (1) and the polishing disc base are connected and fixed, the polishing disc connecting rod (11) is pressed into the polishing disc fixing port (21) without interval.

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 polishing device for optical elements, comprising:

• a tool shank (1), and a polishing disc base;
• wherein the tool shank (1) is connected to the polishing disc base and is mounted on a tool shaft of a numerical-controlled processing device;
• wherein a polishing film (3) is stuck on the polishing disc base;
• the polishing disc base is a bowl-like polishing disc base (12) or a spherical polishing disc base (8).

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).