US20160008944A1 - Polishing device for optical elements and method thereof - Google Patents

Polishing device for optical elements and method thereof Download PDF

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Publication number
US20160008944A1
US20160008944A1 US14/772,307 US201414772307A US2016008944A1 US 20160008944 A1 US20160008944 A1 US 20160008944A1 US 201414772307 A US201414772307 A US 201414772307A US 2016008944 A1 US2016008944 A1 US 2016008944A1
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US
United States
Prior art keywords
polishing
disc base
polishing disc
work piece
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
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US14/772,307
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English (en)
Inventor
Yaolong Chen
Chuan Zhang
XiaoYan Chen
Jun Zha
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RESEARCH INSTITUTE OF XI'AN JIAOTONG UNIVERSITY IN SUZHOU
Xian Jiaotong University
Original Assignee
RESEARCH INSTITUTE OF XI'AN JIAOTONG UNIVERSITY IN SUZHOU
Xian Jiaotong University
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Priority claimed from CN 201320123777 external-priority patent/CN203171384U/zh
Priority claimed from CN 201320124181 external-priority patent/CN203171385U/zh
Priority claimed from CN 201320123105 external-priority patent/CN203171383U/zh
Application filed by RESEARCH INSTITUTE OF XI'AN JIAOTONG UNIVERSITY IN SUZHOU, Xian Jiaotong University filed Critical RESEARCH INSTITUTE OF XI'AN JIAOTONG UNIVERSITY IN SUZHOU
Publication of US20160008944A1 publication Critical patent/US20160008944A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/0006—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for intraocular lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/0012—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for multifocal lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/0018—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for plane optical surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools
    • B24B13/012—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools conformable in shape to the optical surface, e.g. by fluid pressure acting on an elastic membrane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made
    • B24B13/026—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made the contact between tool and workpiece being a line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/06—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses, the tool or work being controlled by information-carrying means, e.g. patterns, punched tapes, magnetic tapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
    • B24B9/146—Accessories, e.g. lens mounting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
    • B24B9/148—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms electrically, e.g. numerically, controlled

Definitions

  • the present invention relates to optical element processing, and more particularly to a polishing device for optical elements and a method thereof.
  • polishing techniques for spherical and planar optical elements are mainly high-speed polishing based on a quasi sphere center method. Devices thereof are cheap and operations are simple. However, according to the device, control of a contact pressure between a polishing disc and a work piece is inaccurate with a large floating range. Therefore, it is difficult to provide certain parameter processing. Moreover, according to conventional polishing methods, work pieces with same curvature radius and same caliber require only one polishing disc base, but work pieces with different curvature radius or different calibers require different polishing disc bases, which increases a processing cost.
  • Aspheric optical element has a great advantage with respect to the spherical optical element. In different areas of modern society, aspheric optical elements are greatly demanded. Therefore, how to accurately and efficiently process the aspheric optical elements has become an urgent problem to be solved.
  • An object of the present invention is to provide a polishing device for optical elements and a method thereof, for increasing processing accuracy and efficiency, and lowering manufacturing costs.
  • a core of the present invention is a polishing method, wherein during polishing, a polishing film of the polishing tool is trimmed to form a spherical surface, a ring-like surface, a cylindrical surface, a conical surface or a plane.
  • Contact between the polishing film and a work piece is a theoretical point-contact, line-contact or surface contact according to a shape of a surface to be polished.
  • a polishing pressure between the polishing tool and the work piece depends on an elastic modulus of the polishing film. Shapes of the work piece and the polishing tool, a pressing depth of the polishing tool (similar to a cutting depth when grinding), and a polishing pressure value are controlled according to a moving trace of the polishing tool relative to the work piece.
  • the moving trace of the polishing tool relative to the work piece equals to the one during grinding. By trace control, it is ensured that the pressing depth of the polishing tool is corresponding to a required polishing pressure.
  • a material removal mechanism is same as the one of conventional polishing methods, which depends on the polishing pressure, a relative linear speed, characteristics of the polishing film and the work piece, and a characteristic of polishing liquid.
  • the present invention firstly provides:
  • a surface-contacted polishing device for spherical and planar optical elements comprising: a tool shank, and a cylinder polishing disc base; wherein the tool shank is connected to the cylinder polishing disc base and is mounted on a tool shaft of a numerical-controlled processing device, or the cylinder polishing disc base is integrated with the tool shaft for being a individual polishing device; wherein a polishing film is stuck on the cylinder polishing disc base.
  • a polishing disc connecting rod is extruded from a bottom of the tool shank, for cooperating with a polishing disc fixing port hollowed at a top of the cylinder polishing disc base, wherein when the tool shank and the cylinder polishing disc base are connected and fixed, the polishing disc connecting rod is pressed into the polishing disc fixing port without interval for ensuring a coaxiality of the cylinder polishing disc base and the tool shaft.
  • threaded fittings are provided on both the tool shank and the cylinder polishing disc base, the tool shank and the cylinder polishing disc base are fixed by screws.
  • the bolt is an inner hexagon bolt, which not only ensures connecting reliability therebetween, but also is convenient to install and maintain.
  • the cylinder polishing disc base is cylinder-shaped, and a bottom thereof is arc-shaped; the cylinder polishing disc base comprises the polishing disc fixing port hollowed at the top thereof; the polishing film is stuck on an arc portion at the bottom of the cylinder polishing disc base.
  • the polishing film is selected according to a material of the unprocessed work piece. There is no requirement for a shape of the polishing film as long as sticking is convenient and fixed.
  • a surface-contacted polishing method for spherical and planar optical elements comprises steps of:
  • the polishing device is installed on the tool shaft of the numerical-controlled device; the polishing device rotates around an axis of the tool shaft and swings around a swinging center B of the tool shaft; the polishing device is also movable along a horizontal direction; the unprocessed work piece is installed on the work piece shaft of the numerical-controlled device; the unprocessed work piece rotates around an axis of the work piece shaft and is movable along a vertical direction; a moving speed of the cylinder polishing disc base and a rotation speed of the unprocessed work piece are controlled by the numerical-controlled device at each processing position, in such a manner that a contacting pressure therebetween is constant at any processing position, for keeping a constant removal amount, and further achieving certain parameter processing.
  • a trimming tool is a grinding wheel with an uncertain-shaped cutting blade, or a facing cutter with a certain-shaped cutting blade.
  • the present invention secondly provides:
  • a line-contacted polishing device for spherical and planar optical elements comprising: a tool shank, and a polishing disc base; wherein the tool shank is connected to the polishing disc base and is mounted on a tool shaft of a numerical-controlled processing device, or the polishing disc base is integrated with the tool shaft for being a individual polishing device; wherein a polishing film is stuck on the polishing disc base; the polishing disc base is a profiling polishing disc base or a cylinder polishing disc base.
  • a polishing disc connecting rod is extruded from a bottom of the tool shank, for cooperating with a polishing disc fixing port hollowed at a top of the polishing disc base, wherein when the tool shank and the polishing disc base are connected and fixed, the polishing disc connecting rod is pressed into the polishing disc fixing port without interval for ensuring a coaxiality of the cylinder polishing disc base and the tool shaft.
  • threaded fittings are provided on both the tool shank and the polishing disc base, the tool shank and the polishing disc base are fixed by screws.
  • the bolt is an inner hexagon bolt, which not only ensures connecting reliability therebetween, but also is convenient to install and maintain.
  • the profiling polishing disc base is a solid of revolution, a generating curve thereof is an arc with a curvature radius of r 1 ;
  • the polishing disc fixing port is provided at an end of the profiling polishing disc base for installing the profiling polishing disc base on the tool shank; before utilization, the polishing film is stuck on a revolution surface of the profiling polishing disc base, and a generating curve of the polishing film is precisely trimmed for being an arc with an curvature radius of r 2 ;
  • a line-contacted polishing method for spherical and planar optical elements comprises steps of:
  • the polishing device is installed on the tool shaft of the numerical-controlled device; the polishing device rotates around an axis of the tool shaft and swings around a swinging center B of the tool shaft; the polishing device is also movable along a horizontal direction; the unprocessed work piece is installed on the work piece shaft of the numerical-controlled device; the unprocessed work piece rotates around an axis of the work piece shaft and is movable along a vertical direction; a moving speed of the cylinder polishing disc base and a rotation speed of the unprocessed work piece are controlled by the numerical-controlled device at each processing position, in such a manner that a contacting pressure therebetween is constant at any processing position, for keeping a constant removal amount, and further achieving certain parameter processing.
  • a trimming tool is a grinding wheel with an uncertain-shaped cutting blade, or a facing cutter with a certain-shaped cutting blade.
  • the polishing film is stuck on a revolution surface of the profiling polishing disc base, and a sticking height ensures that the polishing film is fixedly stuck and covers the whole revolution surface; or the polishing film is stuck on a bottom, which is arc-shaped, of the cylinder polishing disc base.
  • a shape of the polishing film is no requirement for a shape of the polishing film as long as sticking is convenient and fixed.
  • the present invention thirdly provides:
  • a point-contacted polishing device for aspheric optical elements comprising: a tool shank, and a polishing disc base; wherein the tool shank is connected to the polishing disc base and is mounted on a tool shaft of a numerical-controlled processing device, or the polishing disc base is integrated with the tool shaft for being a individual polishing device; wherein a polishing film is stuck on the polishing disc base; the polishing disc base is a bowl-like polishing disc base or a spherical polishing disc base.
  • a polishing disc connecting rod is extruded from a bottom of the tool shank, for cooperating with a polishing disc fixing port hollowed at a top of the polishing disc base, wherein when the tool shank and the polishing disc base are connected and fixed, the polishing disc connecting rod is pressed into the polishing disc fixing port without interval for ensuring a coaxiality of the cylinder polishing disc base and the tool shaft.
  • threaded fittings are provided on both the tool shank and the polishing disc base, the tool shank and the polishing disc base are fixed by screws.
  • the bolt is an inner hexagon bolt, which not only ensures connecting reliability therebetween, but also is convenient to install and maintain.
  • a point-contacted polishing method for aspheric optical elements comprises steps of:
  • the unprocessed work piece is convex and is to be externally polished, trimming an external arc of the polishing film; if the unprocessed work piece is convex and is to be internally polished, trimming an internal arc of the polishing film; i3 the unprocessed work piece is concave, trimming the external arc of the polishing film, or trimming the external arc and the internal arc of the polishing film.
  • a trimming tool is a grinding wheel with an uncertain-shaped cutting blade, or a facing cutter with a certain-shaped cutting blade. There is no requirement for a shape of the polishing film as long as sticking is convenient and fixed.
  • the polishing device is installed on the tool shaft of the numerical-controlled device; the polishing device rotates around an axis of the tool shaft and swings around a swinging center B of the tool shaft; the polishing device is also movable along a horizontal direction; the unprocessed work piece is installed on the work piece shaft of the numerical-controlled device; the unprocessed work piece rotates around an axis of the work piece shaft and is movable along a vertical direction; a moving speed of the cylinder polishing disc base and a rotation speed of the unprocessed work piece are controlled by the numerical-controlled device at each processing position, in such a manner that a contacting pressure therebetween is constant at any processing position, for keeping a constant removal amount, and further achieving certain parameter processing.
  • the present invention has advantages as follows.
  • the curvature radius of the polishing film is able to be accurately trimmed
  • the tool shank is independent and universal, thereby reducing the processing cost of the polishing device.
  • polishing disc is cylinder-shaped. During polishing, ring-surface-contact is formed. By trimming the polishing film, polishing discs with same sizes are applicable to work pieces with different curvature radii.
  • a polishing disc is surface-contacted with a work piece and polishes with a profiling method.
  • the polishing disc is line-contacted with the work piece, which means that during polishing, a contacting trace of the polishing disc and the work piece is a closed or a non-close curve. Because of rotation of the work piece, a desired surface is obtained.
  • the polishing discs are universal. By trimming the polishing film, polishing discs with same sizes are applicable to work pieces with different curvature radii.
  • the moving speed of the polishing disc base and the rotation speed of the unprocessed work piece are controlled by the numerical-controlled device at each processing position, in such a manner that the contacting pressure therebetween is constant at any processing position, for keeping a constant removal amount, and further achieving certain parameter processing.
  • FIG. 1 is a sketch view of a polishing device according to a preferred embodiment 1 of an embodiment 1 of the present invention.
  • FIG. 2 is a sketch view of a tool shank of the present invention.
  • FIG. 3 is a sketch view of a cylinder polishing disc base in FIG. 1 .
  • FIG. 4 illustrates trimming a polishing film according to the preferred embodiment 1 of the embodiment 1.
  • FIG. 5 illustrates polishing a concave element according to the preferred embodiment 1 of the embodiment 1.
  • FIG. 6 is a sketch view of a polishing device according to a preferred embodiment 2 of the embodiment 1 of the present invention.
  • FIG. 7 is a sketch view of a cylinder polishing disc base in FIG. 6 .
  • FIG. 8 illustrates polishing a convex element according to the preferred embodiment 2 of the embodiment 1.
  • FIG. 9 is a sketch view of a polishing device according to a preferred embodiment 3 of the embodiment 1 of the present invention.
  • FIG. 10 is a sketch view of a cylinder polishing disc base in FIG. 9 .
  • FIG. 11 illustrates polishing a planar element according to the preferred embodiment 3 of the embodiment 1.
  • FIG. 12 is a sketch view of a polishing device according to a preferred embodiment 4 of an embodiment 2 of the present invention.
  • FIG. 13 is a sketch view of a profiling polishing disc base in FIG. 12 .
  • FIG. 14 illustrates trimming a polishing film according to the preferred embodiment 4 of the embodiment 2.
  • FIG. 15 illustrates polishing a convex element according to the preferred embodiment 4 of the embodiment 2.
  • FIG. 16 is a sketch view of a polishing device according to a preferred embodiment 5 of the embodiment 2 of the present invention.
  • FIG. 17 is a sketch view of a bowl-like polishing disc base in FIG. 16 .
  • FIG. 18 illustrates polishing a concave element according to the preferred embodiment 5 of the embodiment 2.
  • FIG. 19 is a sketch view of a polishing device according to a preferred embodiment 6 of the embodiment 2 of the present invention.
  • FIG. 20 is a sketch view of a cylinder polishing disc base in FIG. 19 .
  • FIG. 21 illustrates polishing a convex element according to the preferred embodiment 6 of the embodiment 2.
  • FIG. 22 illustrates polishing a concave element according to the preferred embodiment 6 of the embodiment 2.
  • FIG. 23 illustrates polishing a planar element according to the preferred embodiment 6 of the embodiment 2.
  • FIG. 24 is a sketch view of a polishing device according to a preferred embodiment 7 of an embodiment 3 of the present invention.
  • FIG. 25 is a sketch view of a cylinder polishing disc base.
  • FIG. 26 illustrates trimming a polishing film of the cylinder polishing disc base.
  • FIG. 27 illustrates externally polishing a convex aspheric optical element according to the preferred embodiment 7.
  • FIG. 28 illustrates internally polishing the convex aspheric optical element according to the preferred embodiment 7.
  • FIG. 29 illustrates polishing a concave aspheric optical element according to the preferred embodiment 7.
  • FIG. 30 is a sketch view of a polishing device according to a preferred embodiment 8 of the embodiment 3 of the present invention.
  • FIG. 31 is a sketch view of a spherical polishing disc base in FIG. 30 .
  • FIG. 32 illustrates polishing a convex aspheric optical element according to the preferred embodiment 8 of the embodiment 3.
  • FIG. 33 illustrates polishing a concave aspheric optical element according to the preferred embodiment 8 of the embodiment 3.
  • 1 tool shank
  • 2 cylinder polishing disc base
  • 3 polishing film
  • 4 screw
  • 5 trimming grinding wheel
  • 6 unprocessed work piece
  • 7 profiling polishing disc base
  • 8 spherical polishing disc base
  • 9 work piece
  • 11 polishing disc connecting rod
  • 12 bowl-like polishing disc base
  • 21 polishing disc fixing port
  • 31 encodeternal arc
  • 32 internal arc
  • 100 polishing device.
  • the present invention is further illustrated.
  • FIGS. 1-11 an embodiment 1 of the present invention is illustrated.
  • the embodiment 1 provides a surface-contacted polishing device for spherical and planar optical elements.
  • a polishing disc connecting rod 11 is at a bottom of a tool shank 1 , which is able to be pressed into a polishing disc fixing port 21 at a top of a cylinder polishing disc base 2 .
  • the polishing disc connecting rod 11 is pressed into the polishing disc fixing port 21 , and is fixed with the cylinder polishing disc base 2 , in such a manner that there is no interval between the polishing disc connecting rod 11 and the polishing disc fixing port 21 ; wherein the tool shank 1 is fixed on the cylinder polishing disc base 2 by any spanner type, such as inner triangle, inner rectangle, inner hexagon, and double hole, which not only ensures connecting reliability therebetween, but also is convenient to install and maintain.
  • a polishing film 3 is stuck on an arc portion at a bottom of the cylinder polishing disc base 2 .
  • the polishing film 3 is selected according to a material of the unprocessed work piece 6 . There is no requirement for a shape of the polishing film 3 as long as sticking is convenient and fixed.
  • the polishing film 3 is stuck on the arc portion at the bottom of the cylinder polishing disc base 2 by a binding agent, and a sticking height ensures that the polishing film 3 is fixedly stuck.
  • the polishing disc connecting rod 11 is pressed into the polishing disc fixing port 21 .
  • screws 4 which are inner hexagon bolts, are used for fixing, in such a manner that no interval exists therebetween.
  • One side of the polishing film 3 is applied with the binding agent for being stuck on the arc-portion at the bottom of the cylinder polishing disc base 2 . Preparation is finished after the binding agent is solidified.
  • the polishing film 3 of the polishing device 100 is trimmed.
  • the polishing device 100 is installed on a work piece shaft of a numerical-controlled device, and a trimming grinding wheel 5 is installed on a tool shaft of the numerical-controlled device.
  • a curvature radius of the polishing film 3 is trimmed 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 for improving positioning accuracy and processing accuracy.
  • FIG. 5 illustrates polishing a concave element according to the preferred embodiment 1.
  • the polishing device 100 is installed on the tool shaft of the numerical-controlled device.
  • the polishing device 100 rotates around an axis of the tool shaft and swings around a swinging center B of the tool shaft; and the polishing device 100 is also movable along a horizontal direction.
  • An unprocessed work piece 6 is installed on the work piece shaft of the numerical-controlled device.
  • the unprocessed work piece 6 rotates around an axis of the work piece shaft and is movable along a vertical direction.
  • surface forming parameters of the unprocessed work piece 6 and size parameters of the polishing device 100 are firstly inputted into a processing software, for 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 the polishing device 100 coincides with the unprocessed work piece 6 at any processing position for polishing.
  • FIG. 6 is a sketch view of a polishing device 100 according to the preferred embodiment 2, wherein a tool shank 1 and a cylinder polishing disc base 2 are respectively illustrated in FIGS. 2 and 7 .
  • the polishing device 100 comprises: a tool shank 1 for installing a cylinder polishing disc; a cylinder polishing disc base 2 for sticking a polishing film 3 ; and the polishing film 3 for contacting with an unprocessed work piece 6 (not shown) for polishing.
  • the preferred embodiment 2 is suitable for polishing convex elements, and installation and trimming of the polishing film 3 are the same with the preferred embodiment 1 and will not be described again.
  • FIG. 8 illustrates polishing the convex element according to the preferred embodiment 2, and a utilization method thereof is the same as the one of the preferred embodiment 1 and will not be described again.
  • FIG. 9 is a sketch view of a polishing device 100 according to the preferred embodiment 3, wherein a tool shank 1 and a cylinder polishing disc base 2 are respectively illustrated in FIGS. 2 and 10 .
  • the polishing device 100 comprises: a tool shank 1 for installing a cylinder polishing disc; a cylinder polishing disc base 2 for sticking a polishing film 3 ; and the polishing film 3 for contacting with an unprocessed work piece 6 (not shown) for polishing.
  • the preferred embodiment 2 is suitable for polishing planar elements, and installation and trimming of the polishing film 3 are the same with the preferred embodiment 1 and will not be described again.
  • the preferred embodiment 3 is a specific type of the preferred embodiment 1 and 2, which is a special case when curvature radius of the arc portion of the polishing disc base in the preferred embodiment 1 or 2 tends to be infinity.
  • FIG. 11 illustrates polishing the convex element according to the preferred embodiment 3, and a utilization method thereof is the same as the one of the preferred embodiment 1 and will not be described again.
  • polishing device 100 has certain universality, which means that by precisely trimming the curvature radius of the polishing film 3 , the polishing device 100 is suitable for polishing elements with different calibers and curvature radius.
  • a line-contacted polishing device for spherical and planar optical elements is provided.
  • a polishing disc connecting rod 11 is at a bottom of a tool shank 1 , which is able to be pressed into a polishing disc fixing port 21 at a top of a profiling polishing disc base 7 .
  • the polishing disc connecting rod 11 is pressed into the polishing disc fixing port 21 , and is fixed with the profiling polishing disc base 7 , in such a manner that there is no interval between the polishing disc connecting rod 11 and the polishing disc fixing port 21 ; wherein the tool shank 1 is fixed on the profiling polishing disc base 7 by any spanner type, such as inner triangle, inner rectangle, inner hexagon, and double hole, which not only ensures connecting reliability therebetween, but also is convenient to install and maintain.
  • the profiling polishing disc base 7 is a solid of revolution, and a generating curve thereof is an arc with a curvature radius of r 1 .
  • a shape of a profiling polishing disc is suitable for polishing convex elements.
  • a polishing film 3 is stuck on an arc portion at a bottom of the profiling polishing disc base 7 .
  • the polishing film 3 is selected according to a material of the unprocessed work piece 6 . There is no requirement for a shape of the polishing film 3 as long as sticking is convenient and fixed.
  • the polishing film 3 is stuck on a revolution surface of the profiling polishing disc base 7 by a binding agent, and a sticking height ensures that the polishing film 3 is fixedly stuck and covers the whole revolution surface.
  • the polishing disc connecting rod 11 is pressed into the polishing disc fixing port 21 .
  • screws 4 which are inner hexagon bolts, are used for fixing, in such a manner that no interval exists therebetween.
  • One side of the polishing film 3 is applied with the binding agent for being stuck on the revolution surface of the profiling polishing disc base 7 . Preparation is finished after the binding agent is solidified.
  • FIG. 14 illustrates trimming the polishing film 3 according to the preferred embodiment 4.
  • the polishing device 100 is installed on a work piece shaft (not shown) of a numerical-controlled device, wherein the polishing device 100 rotates around an axis of the tool shaft and swings around a swinging center B of the tool shaft; the polishing device 100 is also movable along a horizontal direction.
  • a trimming grinding wheel 5 is installed on a tool shaft (not shown) of the numerical-controlled device, wherein the unprocessed work piece 6 rotates around an axis of the work piece shaft and is movable along a vertical direction.
  • a curvature radius of the polishing film 3 is trimmed by point-contacting, in such a manner that the curvature radius of the polishing film 3 is identical for improving positioning accuracy and processing accuracy.
  • FIG. 15 illustrates polishing a convex element according to the preferred embodiment 4 with the polishing device 100 .
  • the polishing device 100 is installed on the tool shaft (not shown) of the numerical-controlled device.
  • the polishing device 100 rotates around an axis of the tool shaft and swings around a swinging center B of the tool shaft; and the polishing device 100 is also movable along a horizontal direction.
  • An unprocessed work piece 6 is installed on the work piece shaft of the numerical-controlled device.
  • the unprocessed work piece 6 rotates around an axis of the work piece shaft and is movable along a vertical direction.
  • surface forming parameters of an aspheric surface of the unprocessed work piece 6 and size parameters of the polishing device 100 are firstly inputted into a processing software, for generating a numerical-controlling file, so as to controlling 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, and a contacting trace thereof coincides with a meridian section curve of the unprocessed spherical element.
  • FIG. 17 is a sketch view of a polishing device 100 according to the preferred embodiment 5, wherein a tool shank 1 and a profiling polishing disc base 7 are respectively illustrated in FIGS. 2 and 17 .
  • the polishing device 100 comprises: a tool shank 1 for installing a profiling polishing disc; a profiling polishing disc base 7 for sticking a polishing film 3 ; and the polishing film 3 for contacting with an unprocessed work piece 6 (not shown) for polishing.
  • a shape of the profiling polishing disc base 7 is suitable for polishing concave elements, and installation and trimming of the polishing film 3 are the same with the preferred embodiment 4 and will not be described again.
  • FIG. 18 illustrates polishing the concave element according to the preferred embodiment 5, and a utilization method thereof is the same as the one of the preferred embodiment 4 and will not be described again.
  • FIGS. 19 and 20 are sketch views of a polishing device 100 according to the preferred embodiment 6, wherein a tool shank 1 and a cylinder polishing disc base 2 are respectively illustrated in FIGS. 2 and 20 .
  • the polishing device 100 comprises: a tool shank 1 for installing a cylinder polishing disc; a cylinder polishing disc base 2 for sticking a polishing film 3 ; and the polishing film 3 for contacting with an unprocessed work piece 6 (not shown) for polishing.
  • installation and trimming of the polishing film 3 (shown in FIG. 24 ) are the same with the preferred embodiment 4 and will not be described again.
  • the cylinder polishing disc base 2 is cylinder-shaped, wherein an advantage of a shape thereof is that polishing discs with same sizes is suitable for polishing work pieces with different calibers and curvature radii.
  • a processing principle thereof is same with the one of grinding, which belongs to profiling processing.
  • a contacting trace of the cylinder polishing disc base 2 and the unprocessed work piece 6 is an envelope circle.
  • FIGS. 21 , 22 and 23 respectively illustrate polishing a convex element, a concave element and a planar element according to the preferred embodiment 6.
  • a polishing disc connecting rod 11 is at a bottom of a tool shank 1 , which is able to be pressed into a polishing disc fixing port 21 at a top of a cylinder polishing disc base 2 .
  • the polishing disc connecting rod 11 is pressed into the polishing disc fixing port 21 , and is fixed with the cylinder polishing disc base 2 , in such a manner that there is no interval between the polishing disc connecting rod 11 and the polishing disc fixing port 21 ; wherein the tool shank 1 is fixed on the cylinder polishing disc base 2 by any spanner type, such as inner triangle, inner rectangle, inner hexagon, and double hole, which not only ensures connecting reliability therebetween, but also is convenient to install and maintain.
  • spanner type such as inner triangle, inner rectangle, inner hexagon, and double hole
  • a polishing film 3 is stuck on an arc portion at a bottom of the cylinder polishing disc base 2 .
  • the polishing film 3 is selected according to a material of the unprocessed work piece 6 . There is no requirement for a shape of the polishing film 3 as long as sticking is convenient and fixed.
  • the polishing film 3 is stuck on the arc portion at the bottom of the cylinder polishing disc base 2 by a binding agent, and a sticking height ensures that the polishing film 3 is fixedly stuck.
  • the polishing disc connecting rod 11 is pressed into the polishing disc fixing port 21 .
  • screws 4 which are inner hexagon bolts, are used for fixing, in such a manner that no interval exists therebetween.
  • One side of the polishing film 3 is applied with the binding agent for being stuck on the arc-portion at the bottom of the cylinder polishing disc base 2 . Preparation is finished after the binding agent is solidified.
  • the polishing film 3 of the polishing device 100 is trimmed.
  • the polishing device 100 is installed on a work piece shaft of a numerical-controlled device, and a trimming grinding wheel 5 is installed on a tool shaft of the numerical-controlled device.
  • a curvature radius of the polishing film 3 is trimmed by point-contacting.
  • the unprocessed work piece 6 is convex and is to be externally polished, trimming an external arc 31 of the polishing film 3 ; if the unprocessed work piece 6 is convex and is to be internally polished, trimming an internal arc 32 of the polishing film 3 ; if the unprocessed work piece 6 is concave, trimming the external arc 31 of the polishing film 3 , or trimming the external arc 31 and the internal arc 32 of the polishing film 3 .
  • the curvature radius of the polishing film 3 is identical, which improves positioning accuracy and processing accuracy.
  • FIG. 27 illustrates externally polishing a convex aspheric optical element according to the preferred embodiment 7.
  • the polishing device 100 is installed on the tool shaft of the numerical-controlled device.
  • the polishing device 100 rotates around an axis of the tool shaft and swings around a swinging center B of the tool shaft; and the polishing device 100 is also movable along a horizontal direction.
  • An unprocessed work piece 6 is installed on the work piece shaft of the numerical-controlled device.
  • the unprocessed work piece 6 rotates around an axis of the work piece shaft and is movable along a vertical direction.
  • a P point is at an outer area of the polishing film 3 .
  • 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 the 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 .
  • FIG. 28 illustrates internally polishing the convex aspheric optical element according to the preferred embodiment 7.
  • the P point is at an inner area of the polishing film 3 , which is different from externally polishing.
  • FIG. 29 illustrates polishing a concave aspheric optical element according to the preferred embodiment 7.
  • a polishing device 100 comprises a tool shank 1 and a spherical polishing disc base 8 .
  • the polishing device 1 is same with the one in preferred embodiment 1, and the spherical polishing disc base 8 is illustrated in FIG. 31 .
  • the tool shank 1 is for installing the spherical polishing disc base 8 ;
  • the spherical polishing disc base 8 is for sticking a polishing film 3 ;
  • the polishing film 3 is for contacting with an unprocessed work piece 6 (not shown) at a P point for polishing.
  • installation and trimming of the polishing film 3 are the same with the preferred embodiment 1.
  • the spherical polishing disc base 8 is spherical, whose advantage is that a position range of the P point is larger than the one of the preferred embodiment 7, in such a manner that a linear speed range of the P point is also larger for improving polishing.
  • a convex element is only able to be externally polished, which is different from the preferred embodiment 7.
  • FIGS. 32 and 33 respectively illustrate polishing a convex and a concave aspheric optical element according to the preferred embodiment 8.
  • a contacting area between the polishing film 3 and the unprocessed work piece 6 is point-contact. Therefore, the P point and nearby areas will be continuously worn out, which will lower processing accuracy.
  • a position of the P point on the polishing film 3 may be changed or the polishing film 3 may be trimmed again for regaining the processing accuracy.
  • the position of the P point is changed, because by trimming, an arc shape of the polishing film 3 is a standard circle, which means that a distant between the P point and an arc center is certain at any position on the arc.
  • the polishing film 3 will not be trimmed again and again, which improves a coefficient of utilization thereof. After several changing, the polishing film 3 must be trimmed again for ensuring the process accuracy.
US14/772,307 2013-03-19 2014-04-24 Polishing device for optical elements and method thereof Abandoned US20160008944A1 (en)

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CN 201320123777 CN203171384U (zh) 2013-03-19 2013-03-19 一种非球面光学元件的点接触抛光装置
CN 201320124181 CN203171385U (zh) 2013-03-19 2013-03-19 一种球面及平面光学元件的面接触磨抛装置
CN201320123105.7 2013-03-19
CN 201320123105 CN203171383U (zh) 2013-03-19 2013-03-19 一种球面及平面光学元件的线接触磨抛装置
CN201320123777.8 2013-03-19
CN201320124181.X 2013-03-19
PCT/CN2014/076076 WO2014146620A1 (zh) 2013-03-19 2014-04-24 一种光学元件的磨抛装置及方法

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CN110216560A (zh) * 2019-06-06 2019-09-10 浙江工业大学 一种平面抛光装置
CN111136569A (zh) * 2020-01-08 2020-05-12 靳彩霞 骨科植入物球面精密加工组件
CN111376142A (zh) * 2019-12-25 2020-07-07 苏州大学 一种大口径非球面镜数控铣磨成形抛光方法及装置
CN113305653A (zh) * 2021-07-07 2021-08-27 胡靖烯 光学镜片铣磨加工方法
CN114310640A (zh) * 2021-11-26 2022-04-12 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） 一种半球谐振子抛光方法
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