CN114505503A - Ultra-precision machining method for plastic aspheric lens - Google Patents
Ultra-precision machining method for plastic aspheric lens Download PDFInfo
- Publication number
- CN114505503A CN114505503A CN202210288232.6A CN202210288232A CN114505503A CN 114505503 A CN114505503 A CN 114505503A CN 202210288232 A CN202210288232 A CN 202210288232A CN 114505503 A CN114505503 A CN 114505503A
- Authority
- CN
- China
- Prior art keywords
- turning
- blank
- ultra
- aspheric
- point diamond
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B25/00—Accessories or auxiliary equipment for turning-machines
- B23B25/06—Measuring, gauging, or adjusting equipment on turning-machines for setting-on, feeding, controlling, or monitoring the cutting tools or work
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention relates to an ultra-precision processing method of a plastic aspheric lens, which comprises the following steps: 1) blank selection: 2) first surface rough turning and edge turning, 3) first surface finish turning, 4) turning and clamping, 5) second surface rough turning and edge turning, and 6) second surface finish turning. The method can prepare the ultra-precise plastic aspheric lens according to the requirement, and has simple preparation method and high efficiency and yield.
Description
Technical Field
The invention relates to an ultra-precision processing method of a plastic aspheric lens.
Background
In the optical system, the aspheric surface can eliminate the adverse effects of spherical aberration, coma aberration, astigmatism, field curvature, distortion and the like generated by the spherical lens in the optical path, and can reduce the number of the optical lenses and the light intensity loss, thereby obtaining higher-quality imaging effect and higher-quality optical performance.
Aspheric lenses commonly used in optical systems are generally composed of optical glass or optical plastic, which has high transparency characteristics similar to optical glass, but is less expensive and has low melting point characteristics that are easily molded, and thus are generally manufactured in large quantities by a molding method.
The plastic aspherical lens is molded by injecting an optical plastic heated to a fluid into an aspherical mold with ultra high precision and molding the plastic aspherical lens under heating and pressurizing conditions. To copy and mold high precision plastic aspheric lenses, the requirement for the aspheric mold is high, and therefore the aspheric mold is very expensive, which may not be a problem for mass production, but is a great burden for small-lot processing or proofing; and a small amount of plastic aspheric lenses are directly turned by a single-point diamond cutter, so that the method is economical and practical.
Generally, the turning of the aspheric lens made of the infrared silicon germanium material needs to process a spherical surface with the best fitting radius of the aspheric surface in advance by milling and grinding and other processes, and then the aspheric surface is processed after centering and edging. Due to the special material of the plastic lens, if the plastic lens is processed by adopting a similar process flow, the efficiency and the yield are not high.
Disclosure of Invention
The invention provides an ultra-precision processing method of a plastic aspheric lens, which can prepare the ultra-precision plastic aspheric lens according to the requirement, and has simple preparation method and high efficiency and yield.
The invention is realized by the following technical scheme:
the ultra-precision processing method of the plastic aspheric lens comprises the following steps:
1) blank selection:
selecting a wafer with at least one smooth side end face as a blank;
2) rough turning and edge turning of the first surface: the smooth surface of the blank is taken as the inner surface to be adsorbed on a sucker of a workbench of an ultra-precise single-point diamond lathe, and the outer diameter of the blank is measured by using a lever ten-thousandth meter to adjust the coaxiality of the blank and the sucker of the workbench to be within 5 mu m; and then, roughly turning the other side end face of the blank which is not adsorbed and the part of the outer circumferential surface close to the end face by using a single-point diamond cutter to obtain a first spherical contour and a roughly turned first outer circumferential surface, wherein the main technological parameters during turning are as follows: the rotating speed of the main shaft is 2000-;
3) finish turning of a first surface: finish turning the first spherical contour obtained in the step 2) and the roughly turned first outer circumferential surface by using a single-point diamond tool to remove the outer surface layer of the first spherical contour, so that the removal amount of the thickness from the outer surface layer of the spherical contour to the adsorption surface of the blank is between 0.005 and 0.02mm, and the main technological parameters during finish turning are as follows: the main shaft rotating speed is 2500-;
4) turning over and clamping: taking out the lens subjected to the finish turning of the first surface in the step 3), clamping the turned first spherical profile onto a clamping tool, adsorbing the clamping tool on a sucker of a workbench of an ultra-precise single-point diamond lathe, and measuring the outer diameter of the blank by using a lever ten-thousandth meter to adjust the coaxiality of the blank and the sucker of the workbench to be within 1 mu m;
5) rough turning and edge turning of the second surface: inputting aspheric parameters to be processed and outer diameter parameters of the peripheral wall of the smooth surface of the plastic aspheric lens on an ultra-precise single-point diamond lathe, and then performing rough turning on the smooth surface of a blank and the remaining non-turned outer circumferential surface close to the smooth surface by using a single-point diamond cutter to obtain an aspheric profile and a second outer circumferential surface, wherein the main technological parameters during rough turning are as follows: the rotating speed of the main shaft is 2000-;
6) finish turning of the second surface: finish turning the aspheric surface profile and the second outer circumferential surface obtained in the step 5) by using a single-point diamond cutter to remove the outer surface layer of the aspheric surface profile, and enabling the thickness removal amount from the outer surface layer of the aspheric surface profile to the surface of the other spherical surface profile to be 0.005-0.02mm, wherein the finish turning has the following main process parameters: the main shaft rotation speed is 2500-.
Further, the material of the holding and clamping tool is aluminum.
Further, the shape and size of the spherical contour of the lens subjected to the finish turning of the first surface in the step 3) are matched with those of the holding fixture in the step 4), and the positioning surface of the holding fixture is coaxial with the workpiece table of the ultra-precise single-point diamond lathe.
Compared with the prior art, the invention has the following beneficial effects: the invention can directly cut by using the block material, does not need to be preprocessed to obtain the optimal fitting radius, can prepare the ultra-precise plastic aspheric lens according to the requirement, and has simple preparation method and high efficiency and yield.
When the first surface is turned, the profile is directly turned, and part of the outer diameter is turned; after the first surface is processed, the turned partial outer diameter is used as a reference for turning the second surface, and the optical surface meeting the requirements of surface type and eccentricity can be processed without edging and rough machining of a spherical surface with the best fitting radius.
Drawings
Fig. 1 is a schematic structural view of a blank according to example 1 of the present invention.
Fig. 2 is a schematic structural diagram of the blank after step 2) in example 1 of the present invention.
FIG. 3 is a schematic view of a target product of example 1 of the present invention.
Detailed Description
The invention will be further elucidated with reference to the embodiments described hereinafter
Example 1
The ultra-precision processing method of the plastic aspheric lens comprises the following steps:
1) blank selection:
selecting a wafer with at least one smooth side end face as a blank; as shown in the figure
2) Rough turning and edge turning of the first surface: the smooth surface of the blank is taken as the inner surface to be adsorbed on a sucker of a workbench of an ultra-precise single-point diamond lathe, and the outer diameter of the blank is measured by using a lever ten-thousandth meter to adjust the coaxiality of the blank and the sucker of the workbench to be within 5 mu m; and then, roughly turning the other side end face of the blank which is not adsorbed and the part of the outer circumferential surface close to the end face by using a single-point diamond cutter to obtain a first spherical contour 1 and a roughly turned first outer circumferential surface 2, wherein the main technological parameters during turning are as follows: the rotating speed of the main shaft is 2000-; in the embodiment, the main shaft has the rotating speed of 3000 r/min, the cutting amount is 0.05 mm/time, and the feeding amount is 15 mm/min;
3) finish turning of a first surface: finish turning the first spherical contour 1 obtained in the step 2) and the first outer circumferential surface 2 roughly turned by using a single-point diamond tool to remove the outer surface layer of the first spherical contour, so that the removal amount of the thickness from the outer surface layer of the spherical contour to the adsorption surface of the blank is between 0.005 and 0.02mm, and the main technological parameters during finish turning are as follows: the main shaft rotating speed is 2500-; in the embodiment, the rotating speed of the main shaft is 3000 r/min, the cutting amount is 0.01 mm/time, and the feeding amount is 2 mm/min;
4) turning over and clamping: taking out the lens subjected to the finish turning of the first surface in the step 3), clamping the turned first spherical profile onto a clamping tool, adsorbing the clamping tool on a sucker of a workbench of an ultra-precise single-point diamond lathe, and measuring the outer diameter of the blank by using a lever ten-thousandth meter to adjust the coaxiality of the blank and the sucker of the workbench to be within 1 mu m;
5) rough turning and edge turning of the second surface: inputting aspheric parameters to be processed and outer diameter parameters of the peripheral wall of the smooth surface of the plastic aspheric lens on an ultra-precise single-point diamond lathe, and then performing rough turning on the smooth surface of a blank and the remaining non-turned outer circumferential surface close to the smooth surface by using a single-point diamond cutter to obtain an aspheric profile 3 and a second outer circumferential surface 4, wherein the main process parameters during rough turning are as follows: the rotating speed of the main shaft is 2000-; in the embodiment, the rotating speed of the main shaft is 3000 r/min, the cutting amount is 0.05 mm/time, and the feeding amount is 15 mm/min;
6) finish turning of the second surface: finish turning the aspheric surface profile 3 and the second outer circumferential surface 4 obtained in the step 5) by using a single-point diamond cutter to remove the outer surface layer of the aspheric surface profile, and enabling the thickness removal amount from the outer surface layer of the aspheric surface profile to the surface of the other spherical surface profile to be between 0.005 and 0.02mm, wherein the finish turning has the following main process parameters: the main shaft rotation speed is 2500-. In the present example, the shaft speed was 3000 rpm, the cut rate was 0.01 mm/pass, and the feed rate was 2 mm/min.
The material of the holding and clamping tool is aluminum.
The shape and size of the spherical contour of the lens subjected to the finish turning of the first surface in the step 3) are matched with those of the holding fixture in the step 4), and the positioning surface of the holding fixture is coaxial with the workpiece table of the ultra-precise single-point diamond lathe.
The aspheric plastic lens of the present embodiment is shown in fig. 3, and is made of Z-E48R; the aspheric equation and coefficients are as follows:
ρ＝1/R；R＝19.24,K＝-2.200752。
note: and taking the spherical fixed point as the origin of coordinates.
Aspheric PV <1.0um, RMS <0.15 um.
The outer diameter of the blank is 28mm, and the thickness is 7 mm.
The present invention is not limited to the above-described embodiments, and all substitutions and alterations made according to the principles of the present invention are within the scope of the present invention.
Claims (3)
1. The ultra-precision processing method of the plastic non-spherical lens is characterized by comprising the following steps: the method comprises the following steps:
1) blank selection:
selecting a wafer with at least one smooth side end face as a blank;
2) rough turning and edge turning of the first surface: the smooth surface of the blank is taken as the inner surface to be adsorbed on a sucker of a workbench of an ultra-precise single-point diamond lathe, and the outer diameter of the blank is measured by using a lever ten-thousandth meter to adjust the coaxiality of the blank and the sucker of the workbench to be within 5 mu m; and then, roughly turning the other side end face which is not adsorbed by the blank and the part of the outer circumferential surface close to the end face by using a single-point diamond cutter to obtain a first spherical contour (1) and a roughly turned first outer circumferential surface (2), wherein the main technological parameters during turning are as follows: the rotating speed of the main shaft is 2000-;
3) finish turning of a first surface: finish turning the first spherical contour (1) obtained in the step 2) and the roughly turned first outer circumferential surface (2) by using a single-point diamond tool to remove the outer surface layer of the first spherical contour, so that the removal amount of the thickness from the outer surface layer of the spherical contour to the adsorption surface of the blank is between 0.005 and 0.02mm, and the main technological parameters during finish turning are as follows: the main shaft rotating speed is 2500-;
4) turning over and clamping: taking out the lens subjected to the finish turning of the first surface in the step 3), clamping the turned first spherical profile onto a clamping tool, adsorbing the clamping tool on a sucker of a workbench of an ultra-precise single-point diamond lathe, and measuring the outer diameter of the blank by using a lever ten-thousandth meter to adjust the coaxiality of the blank and the sucker of the workbench to be within 1 mu m;
5) rough turning and edge turning of the second surface: inputting aspheric parameters to be processed and outer diameter parameters of the peripheral wall of the smooth surface of the plastic aspheric lens on an ultra-precise single-point diamond lathe, and then performing rough turning on the smooth surface of a blank and the remaining non-turned outer circumferential surface close to the smooth surface by using a single-point diamond cutter to obtain an aspheric profile (3) and a second outer circumferential surface (4), wherein the main technological parameters during rough turning are as follows: the rotating speed of the main shaft is 2000-;
6) finish turning of the second surface: finish turning the aspheric surface profile (3) and the second outer circumferential surface (4) obtained in the step 5) by using a single-point diamond cutter to remove the outer surface layer of the aspheric surface profile, and enabling the thickness removal amount from the outer surface layer of the aspheric surface profile to the surface of the other spherical surface profile to be 0.005-0.02mm, wherein the finish turning has the following main process parameters: the main shaft rotation speed is 2500-.
2. The ultra-precision machining method for a plastic aspherical lens according to claim 1, wherein: the material of the holding and clamping tool is aluminum.
3. The ultra-precision machining method for a plastic aspherical lens according to claim 1, wherein: the shape and size of the spherical contour of the lens subjected to the finish turning of the first surface in the step 3) are matched with those of the holding fixture in the step 4), and the positioning surface of the holding fixture is coaxial with the workpiece table of the ultra-precise single-point diamond lathe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210288232.6A CN114505503A (en) | 2022-03-22 | 2022-03-22 | Ultra-precision machining method for plastic aspheric lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210288232.6A CN114505503A (en) | 2022-03-22 | 2022-03-22 | Ultra-precision machining method for plastic aspheric lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114505503A true CN114505503A (en) | 2022-05-17 |
Family
ID=81555126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210288232.6A Pending CN114505503A (en) | 2022-03-22 | 2022-03-22 | Ultra-precision machining method for plastic aspheric lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114505503A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060073771A1 (en) * | 2003-03-11 | 2006-04-06 | Roland Mandler | Method and device for producing ophthalmic lenses and other shaped bodies with optically active surfaces |
| CN105467480A (en) * | 2015-11-23 | 2016-04-06 | 天津津航技术物理研究所 | Aspheric surface processing method of high-precision CVD ZnSe lens |
| CN106019418A (en) * | 2016-05-13 | 2016-10-12 | 郑海东 | Resin eyeglass processing method |
| CN112123597A (en) * | 2020-09-07 | 2020-12-25 | 天津津航技术物理研究所 | Method for processing small-caliber high-precision optical lens |
| CN114147504A (en) * | 2021-12-14 | 2022-03-08 | 江苏集萃精凯高端装备技术有限公司 | Lens fixing device and ultra-precise turning method of lens |
-
2022
- 2022-03-22 CN CN202210288232.6A patent/CN114505503A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060073771A1 (en) * | 2003-03-11 | 2006-04-06 | Roland Mandler | Method and device for producing ophthalmic lenses and other shaped bodies with optically active surfaces |
| CN105467480A (en) * | 2015-11-23 | 2016-04-06 | 天津津航技术物理研究所 | Aspheric surface processing method of high-precision CVD ZnSe lens |
| CN106019418A (en) * | 2016-05-13 | 2016-10-12 | 郑海东 | Resin eyeglass processing method |
| CN112123597A (en) * | 2020-09-07 | 2020-12-25 | 天津津航技术物理研究所 | Method for processing small-caliber high-precision optical lens |
| CN114147504A (en) * | 2021-12-14 | 2022-03-08 | 江苏集萃精凯高端装备技术有限公司 | Lens fixing device and ultra-precise turning method of lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5938381A (en) | Method and tool for creating a concave surface from a spectacle blank | |
| US9751171B2 (en) | Method to process spectacle lens blanks | |
| CN104339243A (en) | Grinding machine tool and method for processing aspherical monocrystalline silicon lens on machine tool | |
| US5951376A (en) | Procedure of and device for processing optical lenses | |
| EP1203626A1 (en) | Method of producing glasses lenses, and polishing tool | |
| US7765903B2 (en) | Method and device for processing optical workpiece surfaces | |
| CN105467480B (en) | A kind of high-precision CVD ZnSe lens machining method for aspheric surface | |
| US20070119212A1 (en) | Axial symmetric molding glass lens, mold assembly for an axial symmetric molding glass lens, method for manufacturing a mold assembly for an axial symmetric molding glass lens and method for manufacturing an axial symmetric molding glass lens | |
| CN1955763A (en) | Method for manufacturing mold | |
| CN104551894A (en) | Processing method of L-shaped ZnSe (zinc selenide) turning prism | |
| CN102490103A (en) | Meniscus lens and processing method therefor | |
| JP6917904B2 (en) | A method for completely grinding a shaft-shaped workpiece having a cylindrical section and a deformed section. | |
| CN109623558B (en) | Precision forming method of off-axis aspheric lens | |
| CN100418675C (en) | Processing method of germanium single crystal non spherical surface optical element | |
| JPH11198014A (en) | Manufacture of plastic lens | |
| CN114505503A (en) | Ultra-precision machining method for plastic aspheric lens | |
| US10124459B2 (en) | Lens-centering method for spherical center-type processing machine, lens-processing method, and spherical center-type processing machine | |
| KR101725439B1 (en) | Polishing apparatus for ball lens | |
| CN109483365B (en) | Method for processing calcium fluoride material step rotary aspheric lens | |
| CN111300162A (en) | Processing technology of optical lens | |
| CN100418676C (en) | Processing method of zinc selenide and zinc sulfide non spherical surface optical element | |
| CN107052948A (en) | A kind of Cassegrain's primary mirror precision processing method and its matched clamp | |
| CN112496876B (en) | Ultra-precise turning method for aspheric surface of silicon lens | |
| EP0539193B1 (en) | Method of ceramic ferrule outer diameter processing | |
| CN111843628A (en) | Method for chamfering sharp corner of irregular glass lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |