CN114102974B - Processing device and method for off-axis parabolic reflector - Google Patents
Processing device and method for off-axis parabolic reflector Download PDFInfo
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- CN114102974B CN114102974B CN202111383291.3A CN202111383291A CN114102974B CN 114102974 B CN114102974 B CN 114102974B CN 202111383291 A CN202111383291 A CN 202111383291A CN 114102974 B CN114102974 B CN 114102974B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/10—Mirrors with curved faces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
- B29C2045/14237—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity
- B29C2045/14245—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity using deforming or preforming means outside the mould cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0083—Reflectors
Abstract
The invention discloses a processing device and a processing method for an off-axis parabolic reflector, and the technical scheme is as follows: the utility model provides a processingequipment of off-axis parabolic reflector, includes die carrier, mould benevolence, idiosome, mold core and filler material, mould benevolence is connected respectively with idiosome and mold core, the idiosome leaves the clearance with the mold core, filler material fills in the clearance, the idiosome is opposite with the shape of mold core in the working face place, filler material laminates the working face of mold core completely and forms the working face of pyramid speculum, it has a runner in order to filler material injection to open on the working face of idiosome, the place opening that the runner is close to the working face is less, the place opening that the runner kept away from the working face is great. The processing device and the processing method of the off-axis parabolic reflector greatly improve the processing precision and the forming precision, have high production efficiency and reduce the cost.
Description
Technical Field
The invention relates to the field of optics and optical processing, in particular to a processing device and method of an off-axis parabolic reflector.
Background
The off-axis parabolic mirror is a mirror that converts a plane wave into a spherical wave and converts a spherical wave into a plane wave, and is an aspherical mirror that is essential for a beam splitter and a celestial observation optical device that require high resolution. Under the general use condition of off-axis, spherical aberration and non-point aberration exist in the spherical mirror, which are important reasons for the low resolution of the beam splitter. The off-axis parabolic mirror can in principle completely eliminate these aberrations, and can also achieve high resolution in small beamsplitters with short focal distances. The off-axis parabolic mirror is a surface mirror whose reflecting surface is part of a cut-out in the parent paraboloid. Parallel beams or collimated point sources can be focused by off-axis parabolic mirrors, whose off-axis design allows the focal point to be separated from the optical path. Compared with a lens, the off-axis parabolic reflector is not used for generating spherical aberration and chromatic aberration, does not introduce phase delay and absorption loss, and is very suitable for a femtosecond pulse laser.
The traditional off-axis parabolic reflector needs to be turned by a single-point diamond lathe, and has high processing cost and low efficiency. With the improvement of injection molding technology, in some occasions with lower requirements, the injection molding technology can also be adopted, and the injection molding machine can be directly used for production. However, the shrinkage rate is too high in direct injection molding, so that the final molding precision is poor, and the method cannot be applied to the fields of precision measurement and scientific research.
For this situation, chinese patent document CN201510192367.2 provides an "off-axis parabolic multi-mirror system integrated processing method", which is: processing each off-axis parabolic mirror blank according to the structural design of the off-axis parabolic multi-mirror system; manufacturing a clamp according to the position relation among the off-axis parabolic mirrors in the structural design, wherein the off-axis parabolic mirrors are positioned at the inner side of the clamp, and the position relation after clamping by the clamp is consistent with the position relation in the structural design; ensuring that the rotating radius of the diamond cutter is less than half of the minimum distance between adjacent off-axis parabolic mirrors; fixing each off-axis parabolic mirror blank on a clamp and fixing the off-axis parabolic mirror blank on a processing machine tool; each off-axis parabolic mirror is machined. According to the processing method disclosed by the invention, a plurality of off-axis parabolic mirrors are processed at one time, so that the complex assembly process of the optical mirror surface in the later stage is avoided, and the assembly difficulty of an optical device is reduced.
Chinese patent document CN201711371651.1 provides "a fixture for simultaneously machining a plurality of parabolic reflectors with adjustable off-axis amounts", which relates to a fixture for simultaneously machining a plurality of parabolic reflectors with adjustable off-axis amounts: the transmission assembly is installed in the clamp shell through the bearing, the ball screw has 8 and is circumference array distribution, every ball screw all is connected with bevel pinion, all be connected with ball nut on every ball screw, fixed mounting has the dish lid on the clamp shell, ring gear fixed connection in the transmission assembly is in the dish lid downside, the fine setting knob is installed in the planet carrier upper end, 8 anchor clamps slider assemblies are circumference array fixed connection on the corresponding guide rail slider of dish lid and are connected with the ball nut of downside, be equipped with V-arrangement piece on the anchor clamps slider assembly, locking device, anchor clamps slider fixed slot etc. can fix a position the clamp to the work piece.
Both of the above patent documents can greatly improve the production efficiency of the off-axis parabolic mirror, but still require turning by a single-point diamond lathe. The cost of off-axis parabolic mirrors is still relatively high due to the high price of the single point diamond lathe itself and the limited number of discs produced at a time.
Disclosure of Invention
In view of the problems mentioned in the background art, an object of the present invention is to provide a processing device and a processing method for an off-axis parabolic mirror, so as to solve the problems mentioned in the background art.
The technical aim of the invention is realized by the following technical scheme:
the utility model provides a processingequipment of off-axis parabolic reflector, includes die carrier, mould benevolence, idiosome, mold core and filler material, mould benevolence is connected respectively with idiosome and mold core, the idiosome leaves the clearance with the mold core, filler material fills in the clearance, the idiosome is opposite with the shape of mold core in the working face place, filler material laminates the working face of mold core completely and forms the working face of pyramid speculum, it has a runner in order to filler material injection to open on the working face of idiosome, the place opening that the runner is close to the working face is less, the place opening that the runner kept away from the working face is great.
The invention also discloses a processing method of the off-axis parabolic reflector, which comprises the following steps:
s1, selecting a metal material as a blank material, and carrying out engraving and milling on the metal blank to ensure that the working surface of the metal blank is offset from the working surface of a final finished product to a certain extent;
s2, a runner gate is formed on the metal blank body, the gate is arranged on a working surface corresponding to the pyramid reflector, the opening of the gate close to the working surface is smaller, and the opening of the gate far away from the working surface is larger;
s3, selecting die steel as a die core material in a die, and placing the blank and the die core in a die core;
s4, adopting plastic as a filling material, and adopting an injection molding machine to perform injection molding, wherein a finished product consists of a metal blank and the filling material;
s5, finally, performing optical film plating treatment on the reflecting surface.
Preferably, the number of gates in S2 is 1.
Preferably, in the step S1, tungsten is selected as a blank material.
Preferably, the gap between the working surface of the embryo body in the step S1 and the working surface of the mould core is 1-2mm.
Preferably, in the step S5, an evaporation coating machine is used to coat the optical film, then the coating machine is turned off and vacuumized, and then gas for generating ions is injected into the coating machine, and the temperature and the pressure are raised.
Preferably, the plastic in S4 is polytetrafluoroethylene.
In summary, the invention has the following advantages:
1. the metal material with higher hardness and small thermal expansion coefficient is used as the blank material, so that the shrinkage rate of the finished off-axis parabolic reflector is greatly reduced, and the processing precision is greatly improved;
2. the reflection surface of the blank body and the reflection surface of the final product have a certain small distance offset, so that the shrinkage rate of the filling material has small influence, and the molding precision of the final product is improved;
3. the injection molding mode is adopted to fill the plastic into the blank material, so that the production efficiency is high and the cost is reduced;
4. the injection molding mode is adopted to fill the plastic into the blank material, the blank material does not need very high precision, and the cost is reduced.
Drawings
Fig. 1 is a cross-sectional view of the structure of the present invention.
Reference numerals: 1. a blank; 2. a gate; 3. a gap; 4. a mold core; 5. a working surface.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1, a processing device for an off-axis parabolic reflector comprises a die carrier, a die core, a blank 1, a die core 4 and a filling material, wherein the die core is respectively connected with the blank 1 and the die core 4, a gap 3 is reserved between the blank 1 and the die core 4, the filling material is filled in the gap 3, the blank 1 and the die core 4 are opposite in shape at a working surface 5, the filling material is completely attached to the working surface 5 of the die core 4 and forms the working surface 5 of the pyramid reflector, a gate 2 for filling material injection is arranged on the working surface 5 of the blank 1, the opening of the gate 2 close to the working surface 5 is smaller, and the opening of the gate 2 far away from the working surface 5 is larger.
The embodiment also discloses a processing method of the off-axis parabolic reflector, which comprises the following steps:
s1, selecting a metal material as a blank 1 material, and carrying out engraving and milling on the metal blank 1 to ensure that a working surface 5 of the metal blank 1 is offset from a working surface 5 of a final finished product to a certain extent;
s2, a runner gate 2 is formed on the metal blank body 1, the gate 2 is arranged on a working surface 5 corresponding to the pyramid reflector, the opening of the gate 2 close to the working surface 5 is smaller, and the opening of the gate 2 far away from the working surface 5 is larger;
s3, selecting die steel as a die core 4 material in a die, and placing the blank 1 and the die core 4 in a die core;
s4, adopting plastic as a filling material, and adopting an injection molding machine to perform injection molding, wherein a finished product consists of a metal blank 1 and the filling material;
s5, finally, performing optical film plating treatment on the reflecting surface.
Wherein, the number of the pouring gates 2 in the S2 is 1.
Wherein, the tungsten as a metal material is selected as a blank 1 material in the step S1.
Wherein, the clearance 3 between the working surface 5 of the embryo body 1 and the working surface 5 of the mould core 4 in the S1 is 1-2mm.
And when the optical film is coated in the step S5, firstly, an evaporation coating machine is adopted for coating, then the coating machine is closed and vacuumized, and then gas for generating ions is injected into the coating machine, and heating and pressurizing are carried out.
Wherein the plastic in the S4 is polytetrafluoroethylene.
The invention has the following advantages:
1. the metal material with higher hardness and small thermal expansion coefficient is used as the blank 1 material, so that the shrinkage rate of the finished off-axis parabolic reflector is greatly reduced, and the processing precision is greatly improved;
2. the reflecting surface of the blank body 1 and the reflecting surface of the final product have a certain small distance offset, so that the shrinkage rate of the filling material has small influence, and the forming precision of the final product is improved;
3. the injection molding mode is adopted to fill the plastic into the blank 1 material, so that the production efficiency is high and the cost is reduced;
4. the injection molding mode is adopted to fill the plastic into the material of the blank body 1, the material of the blank body 1 does not need very high precision, and the cost is reduced.
Example 2
Referring to fig. 1, the present embodiment provides a method for processing an off-axis parabolic reflector, which is suitable for applications where the opposite PV value is less than 1 micron. The processing comprises the following devices: the mould comprises a mould frame, a mould core, a blank 1, a mould core 4 and a filling material; the die carrier is a universal standard die carrier; the mould core is respectively connected with and fixes the blank body 1 and the mould core 4; the blank 1 is used as a part of a final finished product; the injection material is directly attached and fixed on the embryo body 1; the working surface 5 of the mold core 4 is in an opposite shape to the working surface 5 of the off-axis parabolic reflector.
The off-axis parabolic reflector processing method adopts an injection molding mode, the off-axis parabolic reflector body comprises a blank body 1 and a filling material, and finally an optical reflecting film is plated on a working surface 5 of the off-axis parabolic reflector.
The blank 1 is made of a metal material, and has the characteristics of high hardness and small thermal expansion system;
the blank 1 is processed by engraving and milling, and the working surface 5 of the blank 1 is offset from the working surface 5 of the final product by a certain small distance;
the blank 1 is provided with a runner and a gate 2 which are required in the injection molding process;
the gate 2 is arranged on the working surface 5 corresponding to the pyramid reflector, the opening of the gate 2 close to the working surface 5 is smaller, and the opening of the gate 2 far away from the working surface 5 is larger;
the number of the pouring gates 2 is 1, and the number of the pouring gates 2 can be adjusted according to the size of the pyramid reflector;
the mold core 4 is made of mold steel, and can be made of other metals according to actual requirements.
The blank 1 and the mold core 4 are both arranged in the mold core, and the working surface 5 of the blank 1 and the working surface 5 of the mold core 4 are offset and have a small distance 3.
The filling material is plastic or other high polymer materials.
The processing method of the off-axis parabolic reflector in the embodiment adopts an injection molding mode, specifically, a thinner filling material is injected on the metal blank 1, the filling material and the blank 1 form a substrate of the off-axis parabolic reflector, and an optical reflecting film is plated on the working surface 5 of the substrate to complete the processing of the off-axis parabolic reflector.
Referring to fig. 1, a small gap 3 is left between the blank 1 and the core 4 for filling with a filling material. The shape of the working surface 5 of the blank 1 is opposite to that of the working surface 6 of the mold core 4, and the filling material is attached to the working surface 5 of the mold core 4 to form the working surface of the off-axis parabolic reflector. The working surface 5 of the blank 1 is provided with 1 pouring gate 2 for filling material injection.
The gate 2 is arranged on the working surface corresponding to the pyramid reflector, the opening of the place close to the working surface is smaller, and the opening of the place far away from the working surface is larger.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A processing device for an off-axis parabolic reflector, which is characterized in that: the mold core is respectively connected with the blank body and the mold core, a gap is reserved between the blank body and the mold core, the filling material is filled in the gap, the blank body and the mold core are opposite in shape at the working surface, the filling material is completely attached to the working surface of the mold core and forms the working surface of the pyramid reflector, a gate for filling the filling material is arranged on the working surface of the blank body, the opening of the gate close to the working surface is smaller, and the opening of the gate far away from the working surface is larger; the filling material is plastic, and the blank is a metal material; the working surface of the blank is offset from the reflecting surface of the final product by a small distance so that the shrinkage of the filler material has less effect.
2. A method for processing an off-axis parabolic reflector, which is characterized by comprising the following steps: the method is suitable for occasions with the surface type PV value of less than 1 micron for the off-axis reflecting surface, and comprises the following steps:
s1, selecting a metal material as a blank material, and carrying out engraving and milling on the metal blank to ensure that a working surface of the metal blank and a reflecting surface of a final finished product have offset with a certain small distance so as to ensure that the shrinkage rate of the filling material has small influence;
s2, a runner gate is formed on the metal blank body, the gate is arranged on a working surface corresponding to the pyramid reflector, the opening of the gate close to the working surface is smaller, and the opening of the gate far away from the working surface is larger;
s3, selecting die steel as a die core material in a die, and placing the blank and the die core in a die core;
s4, adopting plastic as a filling material, and adopting an injection molding machine to perform injection molding, wherein a finished product consists of a metal blank and the filling material;
s5, finally, performing optical film plating treatment on the reflecting surface.
3. A method of manufacturing an off-axis parabolic reflector according to claim 2, wherein: the number of the pouring gates in the S2 is 1.
4. A method of manufacturing an off-axis parabolic reflector according to claim 2, wherein: and S1, selecting a metal material tungsten as a blank material.
5. A method of manufacturing an off-axis parabolic reflector according to claim 2, wherein: and the gap between the working surface of the blank in the step S1 and the working surface of the mold core is 1-2mm.
6. A method of manufacturing an off-axis parabolic reflector according to claim 2, wherein: and when the optical film is coated in the step S5, firstly, an evaporation coating machine is adopted for coating, then the coating machine is closed and vacuumized, and then gas for generating ions is injected into the coating machine, and heating and pressurizing are carried out.
7. A method of manufacturing an off-axis parabolic reflector according to claim 2, wherein: the plastic in the step S4 is polytetrafluoroethylene.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383291.3A CN114102974B (en) | 2021-11-22 | 2021-11-22 | Processing device and method for off-axis parabolic reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383291.3A CN114102974B (en) | 2021-11-22 | 2021-11-22 | Processing device and method for off-axis parabolic reflector |
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| Publication Number | Publication Date |
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| CN114102974A CN114102974A (en) | 2022-03-01 |
| CN114102974B true CN114102974B (en) | 2023-09-01 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841951A (en) * | 2015-04-20 | 2015-08-19 | 天津大学 | Off-axis parabolic multi-lens system integrated machining method |
| CN107297859A (en) * | 2017-06-16 | 2017-10-27 | 佛山顺德伊之密模压成型技术有限公司 | A kind of metal and plastic coinjection former and its forming process |
| CN107838725A (en) * | 2017-12-18 | 2018-03-27 | 吉林大学 | One kind measures adjustable multiple parabolic mirrors clamp for machining simultaneously off axis |
| CN109648683A (en) * | 2017-10-11 | 2019-04-19 | 蓝思科技（长沙）有限公司 | A kind of ceramic injection forming mold and method |
| CN111151978A (en) * | 2020-01-08 | 2020-05-15 | 孔令豹 | Precision machining process of integrated metal pyramid reflector |
| CN111300693A (en) * | 2020-04-09 | 2020-06-19 | 江苏九铸合金新材料有限公司 | Alloy die manufacturing process and die manufactured by same |
| CN113146936A (en) * | 2021-04-26 | 2021-07-23 | 深圳市至美非凡科技有限公司 | In-mold injection molding process combining refrigeration of beauty instrument and skin detection |
-
2021
- 2021-11-22 CN CN202111383291.3A patent/CN114102974B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841951A (en) * | 2015-04-20 | 2015-08-19 | 天津大学 | Off-axis parabolic multi-lens system integrated machining method |
| CN107297859A (en) * | 2017-06-16 | 2017-10-27 | 佛山顺德伊之密模压成型技术有限公司 | A kind of metal and plastic coinjection former and its forming process |
| CN109648683A (en) * | 2017-10-11 | 2019-04-19 | 蓝思科技（长沙）有限公司 | A kind of ceramic injection forming mold and method |
| CN107838725A (en) * | 2017-12-18 | 2018-03-27 | 吉林大学 | One kind measures adjustable multiple parabolic mirrors clamp for machining simultaneously off axis |
| CN111151978A (en) * | 2020-01-08 | 2020-05-15 | 孔令豹 | Precision machining process of integrated metal pyramid reflector |
| CN111300693A (en) * | 2020-04-09 | 2020-06-19 | 江苏九铸合金新材料有限公司 | Alloy die manufacturing process and die manufactured by same |
| CN113146936A (en) * | 2021-04-26 | 2021-07-23 | 深圳市至美非凡科技有限公司 | In-mold injection molding process combining refrigeration of beauty instrument and skin detection |
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| CN114102974A (en) | 2022-03-01 |
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