CN108789022A - Optical crystal chip manufacturing equipment - Google Patents

Optical crystal chip manufacturing equipment Download PDF

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Publication number
CN108789022A
CN108789022A CN201810525295.2A CN201810525295A CN108789022A CN 108789022 A CN108789022 A CN 108789022A CN 201810525295 A CN201810525295 A CN 201810525295A CN 108789022 A CN108789022 A CN 108789022A
Authority
CN
China
Prior art keywords
cup
optical crystal
crystal chip
rack
fluctuating
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.)
Pending
Application number
CN201810525295.2A
Other languages
Chinese (zh)
Inventor
侯明永
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.)
CHONGQING JINGYU OPTOELECTRONICS TECHNOLOGY Co Ltd
Original Assignee
CHONGQING JINGYU OPTOELECTRONICS TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHONGQING JINGYU OPTOELECTRONICS TECHNOLOGY Co Ltd filed Critical CHONGQING JINGYU OPTOELECTRONICS TECHNOLOGY Co Ltd
Priority to CN201810525295.2A priority Critical patent/CN108789022A/en
Publication of CN108789022A publication Critical patent/CN108789022A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/0031Machines having several working posts; Feeding and manipulating devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005Blocking means, chucks or the like; Alignment devices
    • B24B13/0052Lens block moulding devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/04Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses involving grinding wheels controlled by gearing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B25/00Grinding machines of universal type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00Drives or gearings; Equipment therefor
    • B24B47/10Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/12Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02Machines 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
    • B24B9/06Machines 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
    • B24B9/08Machines 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
    • B24B9/14Machines 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02Machines 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
    • B24B9/06Machines 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
    • B24B9/08Machines 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
    • B24B9/14Machines 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
    • B24B9/146Accessories, e.g. lens mounting devices

Abstract

The present invention relates to optical crystal chip manufacturing fields, and in particular to optical crystal chip manufacturing equipment is disposed with polishing pad, fluctuating mechanism and ball screw assembly, polishing pad in rack and is rotatably dispose in rack;Fluctuating mechanism includes wedge block and several relief elements, and each relief elements include fluctuating plate and spring, and fluctuating plate surrounds the cup body that upper and lower end is open, and the opening diameter of cup upper end is more than the opening diameter of cup body lower end;The lower end of fluctuating plate is articulated in rack, and the upper end of fluctuating plate is fixedly connected by spring with rack, and spring is located at outside cup body;Wedge block can be around the external rotation simultaneously interval promotion fluctuating plate rotation of cup body;Ball screw assembly, includes screw rod and nut seat, and screw rod is rotatably dispose in rack, and spongy layer is fixed on nut seat, and spongy layer can be with the lower end in contact of cup body.When using the technical program, chamfering can be carried out to optical crystal chip while uniform grinding optical crystal chip.

Description

Optical crystal chip manufacturing equipment
Technical field
The present invention relates to optical crystal chip manufacturing fields, and in particular to optical crystal chip manufacturing equipment.
Background technology
A kind of light transmission equipment of the optical crystal chip as imaging device, middle part thickness, thin edge, needs people in process Work carries out grinding process to the surface of optical crystal chip, and due to thick, thin edge structure limitation in the middle part of optical crystal chip, it is easy to go out It now polishes non-uniform situation, and also needs to carry out chamfering to the edge of optical crystal chip after polishing, processing efficiency can be caused Decline.
Invention content
It the manufacture of chamfering being carried out to it while uniform grinding optical crystal chip sets the purpose of the present invention is to provide a kind of It is standby.
In order to achieve the above objectives, technical scheme of the present invention provide optical crystal chip manufacturing equipment, including rack, polishing pad, Fluctuating mechanism, ratch, ball screw assembly, and motor, the polishing pad is rotatably dispose in rack, and is covered on the side wall of polishing pad Equipped with gear ring;
The ratch is rotatably dispose in rack vertically, and ratch is engaged with gear ring;The motor is fixed on the rack, electricity Machine output shaft is coaxially fixed with gear straight up and on motor output shaft, and the gear is engaged with ratch;
The fluctuating mechanism includes wedge block and several relief elements, and each relief elements include fluctuating plate and spring, institute It states fluctuating plate and surrounds the cup body that upper and lower end is open, the opening diameter of cup upper end is more than the opening diameter of cup body lower end;It is described The lower end of fluctuating plate is articulated in rack, and the upper end of the fluctuating plate is fixedly connected by spring with rack, and the spring is located at Outside cup body, external rotation and interval that the wedge block can be around cup body push the rotation of fluctuating plate;
The ball screw assembly, includes screw rod and nut seat, and the screw rod is fixedly connected with motor output shaft, the nut It is fixed with spongy layer on seat, the spongy layer can be with the lower end in contact of cup body.
This programme has the technical effect that:Coordinated by wedge block, fluctuating plate and the spring in polishing pad and fluctuating mechanism, For wedge block during being rotated around cup body, interval pushes fluctuating plate around hinge joint to cup body inner rotation, to keep optics brilliant The end face edge of piece is contacted with polishing pad successively, and optical crystal chip can be polished into middle part thickness, the shape of thin edge, while wedge block During around cup body rotation and interval promotion fluctuating plate, the position and polishing that each needs of optical crystal chip are polished can guarantee The time consistency of disk contact, polishing degree are consistent, realize the uniform grinding of optical crystal chip;Simultaneously spongy layer on nut seat with Under fluctuating plate end in contact and push fluctuating plate rotate during, cup upper end opening can become larger, optical crystal chip can along cup body to Lower movement, while wedge block pushes fluctuating plate upper end around hinge joint to cup body inner rotation, since optical crystal chip is moved downwardly A distance, so the corner angle of optical crystal chip can be contacted with polishing pad, to realize the chamfering to optical crystal chip corner angle.
Further, the polishing pad is slideably positioned in rack, and support plate, support plate energy are fixed on the nut seat Into in cup body.This programme has the technical effect that:After optical crystal chip of having polished, after support plate and optical crystal chip contact, energy Realization automatically ejects optical crystal chip, convenient for fetching optical crystal chip.
Further, the fluctuating plate is equipped with arc panel, and the arc panel is located inside cup body.The technology of this programme is imitated Fruit is:During cup upper end opening becomes larger, arc panel can prevent optical crystal chip from sliding down always, it is ensured that optics is brilliant Piece chamfering smoothly completes.
Further, the ratch includes several gear teeth, and each gear teeth include two fields of conjugate action and upper and lower two end faces, It is set on each field of conjugate action there are one inclined-plane, the field of conjugate action transition that the upper surfaces of the gear teeth passes through inclined-plane and the gear teeth.The technology of this programme Effect is:When gear ring is engaged with ratch again, the access road that annular gear teeth enters ratch tooth socket can be increased, it is ensured that gear ring with Ratch smoothly engages.
Further, telescopic rod is fixed on the gear, the wedge block is fixed on telescopic rod.The technology of this programme Effect is:When optical crystal chip is put into cup body, by the length of adjustable telescopic rod, wedge block is made to be detached with fluctuating plate, Ensure to be horizontal after optical crystal chip is put into cup body inside, avoids and be put into an inclined manner and can not ensure that optical crystal chip is put The whether suitable problem of angle setting degree, further ensures the uniform grinding of optical crystal chip.
Further, it is located at the fluctuating plate inside cup body and is equipped with clamping block.This programme has the technical effect that:In polishing light During learning chip, clamping block can limit optical crystal chip, improve the stability of optical crystal chip, it is ensured that optical crystal chip Polishing quality.
Further, the inclined-plane of the wedge block is equipped with graphite linings.This programme has the technical effect that:It is oblique to reduce wedge block Frictional force between face and fluctuating plate, it is ensured that wedge block pushes fluctuating plate smooth rotation.
Description of the drawings
Fig. 1 is the schematic diagram before the present invention is ground optical crystal chip;
Fig. 2 is the schematic diagram when present invention is ground optical crystal chip;
Fig. 3 is the schematic diagram after spongy layer is contacted with fluctuating plate;
Fig. 4 is made of the vertical view of cup body fluctuating plate;
Fig. 5 is the vertical view of ratch;
Fig. 6 is enlarged drawing at A in Fig. 1;
Fig. 7 is the optical crystal chip schematic diagram after the completion of polishing.
Specific implementation mode
Below by the further details of explanation of specific implementation mode:
Reference numeral in Figure of description includes:Polishing pad 1, servo motor 3, "T"-shaped bar 4, gear ring 5, is nibbled ratch 2 Conjunction face 6, inclined-plane 7, gear 8, wedge block 9, fluctuating plate 10, spring 11, cup body 12, optical crystal chip 13, arc panel 14, clamping block 15, outer tube 16, inner sleeve 17, screw rod 18, nut seat 19, gag lever post 20, spongy layer 21, supporting rod 22, support plate 23.
Optical crystal chip manufacturing equipment as shown in Figure 1, including polishing pad 1, fluctuating mechanism, ratch 2, ball screw assembly, and watch Take motor 3.Polishing pad 1 is fixedly connected with the "T"-shaped bar 4 above it, and "T"-shaped bar 4 is rotatably dispose in rack, and "T"-shaped Bar 4 can be slided up and down relative to rack, and rack gear 5 is fixed on the side wall of polishing pad 1.
Ratch 2 is rotatably arranged in rack vertically, the gear teeth meshing of the gear teeth on ratch 2 and gear ring 5.The gear teeth of ratch 2 Including upper and lower two end faces and two fields of conjugate action 6, there are one inclined-planes 7 for cutting on each field of conjugate action 6, and the upper surface of the gear teeth passes through 6 transition of the field of conjugate action on inclined-plane 7 and the gear teeth, vertical view are as shown in Figure 5.Again as shown in Figure 1, servo motor 3 is fixed on the rack, 3 output shaft of servo motor straight up, is coaxially fixed with gear 8, the gear teeth and the ratch 2 of gear 8 on 3 output shaft of servo motor Gear teeth meshing.
Fluctuating mechanism includes wedge block 9 and several relief elements, and each relief elements include fluctuating plate 10 and spring 11, are risen Volt plate 10 surrounds the cup body 12 that a upper and lower end is open, and the opening diameter of 12 upper end of cup body is more than the opening of 12 lower end of cup body Diameter, for cup body 12 for placing optical crystal chip 13, optical crystal chip 13 waits for buffed surface higher than being fixed on 12,10 fluctuating plate of cup body Arc panel 14, arc panel 14 are located on the inner wall of cup body 12.It is solid on fluctuating plate 10 wherein as shown in (i.e. such as Fig. 6) at A in Fig. 1 Surely there are several clamping blocks 15 (only showing one in Fig. 1), while being also fixed with several clamping blocks 15 on arc panel 14, in addition cup body 12 vertical view is as shown in Figure 4.Again as shown in Figure 1, the lower end of fluctuating plate 10 is articulated in rack, the upper end of fluctuating plate 10 passes through Spring 11 is fixedly connected with rack.
Telescopic rod is fixed on gear 8, telescopic rod includes the outer tube 16 of lower end and is sheathed on interior in outer tube 16 Casing 17, inner sleeve 17 and outer tube 16 are bolted, and wedge block 9 is fixed on 17 upper end of inner sleeve, and wedge block 9 is with gear It can be around the external rotation of cup body 12 during 8 rotations;As shown in Fig. 2, after working as adjusting bolt and pulling up inner sleeve 17, wedge Shape block 9 contacts with one block of fluctuating plate 10 in left side and the fluctuating plate 10 is pushed to be rotated clockwise around its hinge joint, and optics is brilliant at this time Piece 13 is wherein fixed with graphite linings in 12 tilted placement of cup body on the inclined-plane 7 of wedge block 9.
Ball screw assembly, includes screw rod 18 and nut seat 19, and screw rod 18 is fixedly connected with 3 output shaft upper end of servo motor, spiral shell It is provided with through-hole in female seat 19, gag lever post 20 is fixed in rack, gag lever post 20 limits nut seat 19 after passing through through-hole.Spiral shell The upper surface of female seat 19 is fixed with spongy layer 21 and supporting rod 22, and the upper end of supporting rod 22 is fixed with support plate 23, support plate 23 It is slidably connected with screw rod 18.
When polishing optical crystal chip 13, "T"-shaped bar 4 is manually carried upwards, to pull polishing pad 1 to move up, gear ring 5 The gear teeth are no longer engaged with the gear teeth of ratch 2, after 13 level of optical crystal chip is put into cup body 12, under push away "T"-shaped bar 4, drive polishing Disk 1 and gear ring 5 move down, the gear teeth meshing of the gear teeth and ratch 2 of gear ring 5, as shown in Figure 1.
As shown in Fig. 2, pulling up inner sleeve 17 after reversely rotating bolt, to push wedge block 9 to move up, work as wedge After shape block 9 is contacted with one block of fluctuating plate 10 in left side, push fluctuating plate 10 around it during wedge block 9 continues to move up Hinge joint rotates clockwise, and to push optical crystal chip 13 to rotate clockwise, makes 13 slant setting of optical crystal chip in cup body 12, And the edge of 13 upper surface of optical crystal chip is made to be contacted with polishing pad 1, then tighten bolt.
Start servo motor 3 after regulating the time interval of 3 forward and backward of servo motor, 3 output shaft forward direction of servo motor turns Band moving gear 8 rotates forward in dynamic process, to drive gear ring 5 to rotate forward by ratch 2, and then drives polishing pad 1 just To rotation;Telescopic rod and wedge block 9 is driven to be rotated around cup body 12 while gear 8 rotates forward, wedge block 9 is around 12 turns of cup body It in dynamic process, pushes fluctuating plate 10 to rotate successively, to make the edge of optical crystal chip 13 be contacted successively with polishing pad 1, realizes The polishing of optical crystal chip 13.
Screw rod 18 is driven to rotate forward while 3 output shaft of servo motor rotates forward, to drive nut to move up, As shown in figure 3, after the spongy layer 21 on nut seat 19 is with fluctuating 10 times end in contact of plate, continued to move up in nut seat 19 In the process, it is rotated clockwise around its hinge joint positioned at the fluctuating plate 10 on right side, and the fluctuating plate 10 in left side is in the blocking of wedge block 9 Lower position remains unchanged, and the lower end of fluctuating plate 10 is absorbed in spongy layer 21;After the upper end opening of cup body 12 becomes larger, in cup body 12 13 slide downward of optical crystal chip, since the position height in 13 left side of optical crystal chip is constant, so the corner angle of optical crystal chip 13 at this time It is contacted with polishing pad 1, wedge block 9 is realized during being rotated around cup body 12 and pushing fluctuating plate 10 to rotate successively to optics The chamfering of 13 corner angle of chip.
After the completion of 13 chamfering of optical crystal chip, during nut seat 19 continues to move up, push support plate 23 to Upper movement pushes optical crystal chip 13 to move up after support plate 23 and the contact of optical crystal chip 13, and it is brilliant then manually to take out optics Piece 13;Then inner sleeve 17 is pushed down on after reversely rotating bolt, to push wedge block 9 to move down, makes wedge block 9 and rises It lies prostrate plate 10 to detach, servo motor 3 rotates backward at this time, drives nut seat 19 to reset, then by 13 cup body 12 of optical crystal chip, makes Polished completion one down, repeat the above steps, do not polish optical crystal chip 13 carry out on one side polishing and chamfering, add Optical crystal chip 13 after the completion of work is as shown in fig. 7, i.e. middle part thickness, thin edge, corner angle pass through chamfered.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those skilled in the art, Without departing from the inventive concept of the premise, several modifications and improvements can also be made, these should also be considered as the guarantor of the present invention Range is protected, these all do not interfere with the effect and patent practicability that the present invention is implemented.The present invention omits the technology of description, shape Shape, construction part are known technology.

Claims (7)

1. optical crystal chip manufacturing equipment, it is characterised in that:Including rack, polishing pad, fluctuating mechanism, ratch, ball screw assembly, and Motor, the polishing pad is rotatably dispose in rack, and rack gear is arranged on the side wall of polishing pad;
The ratch is rotatably dispose in rack vertically, and ratch is engaged with gear ring;The motor is fixed on the rack, and motor is defeated Shaft is coaxially fixed with gear straight up and on motor output shaft, and the gear is engaged with ratch;
The fluctuating mechanism includes wedge block and several relief elements, and each relief elements include fluctuating plate and spring, described Volt plate surrounds the cup body that upper and lower end is open, and the opening diameter of cup upper end is more than the opening diameter of cup body lower end;The fluctuating The lower end of plate is articulated in rack, and the upper end of the fluctuating plate is fixedly connected by spring with rack, and the spring is located at cup body Outside, the external rotation and interval that the wedge block can be around cup body push the rotation of fluctuating plate;
The ball screw assembly, includes screw rod and nut seat, and the screw rod is fixedly connected with motor output shaft, on the nut seat It is fixed with spongy layer, the spongy layer can be with the lower end in contact of cup body.
2. optical crystal chip manufacturing equipment according to claim 1, it is characterised in that:The polishing pad is slideably positioned in rack On, support plate is fixed on the nut seat, support plate can enter in cup body.
3. optical crystal chip manufacturing equipment according to claim 2, it is characterised in that:The fluctuating plate is equipped with arc panel, The arc panel is located inside cup body.
4. optical crystal chip manufacturing equipment according to claim 3, it is characterised in that:The ratch includes several gear teeth, often A gear teeth include two fields of conjugate action and upper and lower two end faces, are set on each field of conjugate action there are one inclined-plane, the upper surface of the gear teeth is logical Cross the field of conjugate action transition of inclined-plane and the gear teeth.
5. optical crystal chip manufacturing equipment according to claim 4, it is characterised in that:It is fixed with telescopic rod on the gear, The wedge block is fixed on telescopic rod.
6. optical crystal chip manufacturing equipment according to claim 5, it is characterised in that:It is set on fluctuating plate inside cup body There is clamping block.
7. optical crystal chip manufacturing equipment according to claim 6, it is characterised in that:The inclined-plane of the wedge block is equipped with stone Layer of ink.
CN201810525295.2A 2018-05-28 2018-05-28 Optical crystal chip manufacturing equipment Pending CN108789022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810525295.2A CN108789022A (en) 2018-05-28 2018-05-28 Optical crystal chip manufacturing equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810525295.2A CN108789022A (en) 2018-05-28 2018-05-28 Optical crystal chip manufacturing equipment

Publications (1)

Publication Number Publication Date
CN108789022A true CN108789022A (en) 2018-11-13

Family

ID=64090653

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810525295.2A Pending CN108789022A (en) 2018-05-28 2018-05-28 Optical crystal chip manufacturing equipment

Country Status (1)

Country Link
CN (1) CN108789022A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112139908A (en) * 2020-09-24 2020-12-29 邓建芳 Optical lens polishing device for precision instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112139908A (en) * 2020-09-24 2020-12-29 邓建芳 Optical lens polishing device for precision instrument

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Application publication date: 20181113