CN114589318A - Device and method for machining off-axis ellipsoidal reflector - Google Patents
Device and method for machining off-axis ellipsoidal reflector Download PDFInfo
- Publication number
- CN114589318A CN114589318A CN202210246468.3A CN202210246468A CN114589318A CN 114589318 A CN114589318 A CN 114589318A CN 202210246468 A CN202210246468 A CN 202210246468A CN 114589318 A CN114589318 A CN 114589318A
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- China
- Prior art keywords
- clamp
- shaped clamp
- axis
- ellipsoidal reflector
- positioning pin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
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- 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
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Abstract
The invention discloses a device and a method for processing an off-axis ellipsoidal reflector, belonging to the field of optical ultra-precision processing; the technical scheme is as follows: a group of precise mechanical devices suitable for turning off-axis ellipsoidal surfaces are adopted to finish the processing of off-axis ellipsoidal reflector, and the device comprises a precise V-shaped clamp (20) and a disc clamp (30); the V-shaped clamp (20) comprises two inclined planes, and a positioning pin (21) and a through hole (22) are arranged on each inclined plane; the disc clamp (30) comprises a positioning pin (31) and a through hole (32); two off-axis ellipsoidal reflector mirrors (10) to be processed are positioned by positioning pins (21) and then are simultaneously installed on a V-shaped clamp (20), then the V-shaped clamp (20) is connected with a positioning pin (31) through a central positioning hole (22) and is combined with a disc clamp (30) to form a device, and the device is fixed on a vacuum chuck of a lathe and then directly completes the turning of the two reflectors. The method has fewer clamps, can effectively reduce repeated positioning errors and surface size errors in the assembling process and improve the turning efficiency.
Description
Technical Field
The invention belongs to the field of optical ultra-precision machining, and particularly relates to a device and a method for machining an off-axis ellipsoidal reflector.
Background
The off-axis ellipsoidal reflective optical system has the characteristics of simple structure, no chromatic aberration, applicability in a wide wavelength band from infrared to ultraviolet and the like due to the two focuses, and has important functions in the fields of laser manufacturing, advanced optical imaging and the like. At present, the ultraprecise machining of the off-axis ellipsoid in China is mainly completed by adopting a traditional polishing method, for example, documents disclose that the machining of the ellipsoidal reflector with large off-axis quantity is realized, although the precision is higher, the machining of the ellipsoidal reflector with large off-axis quantity can be realized, the methods of rough grinding, fine grinding and polishing are still adopted, the efficiency is low, and the cost is high. For another example, chinese patent CN201410650735.9 discloses an off-axis reflective optical system with an ellipsoidal mirror as a main mirror, and the application patent only relates to how to design an ellipsoidal mirror, and has no specific manufacturing process.
Disclosure of Invention
The invention aims to provide a device and a method for processing an off-axis ellipsoidal reflector, which have small repeated positioning error and high precision and are suitable for single-point diamond turning.
The technical scheme for realizing the aim of the invention is that
The processing device comprises a precise V-shaped clamp (20) and a disc clamp (30); the V-shaped clamp (20) comprises two inclined planes, and a positioning pin (21) and a through hole (22) are arranged on each inclined plane; the disc clamp (30) comprises a positioning pin (31) and a through hole (32); two off-axis ellipsoidal reflectors (10) with the diameter of D to be processed are positioned by positioning pins (21) and then are simultaneously installed on a V-shaped clamp (20), then the V-shaped clamp (20) is connected with a positioning pin (31) through a central positioning hole (22) and is combined with a disc clamp (30) to form a device, and the device is fixed on a vacuum chuck of a lathe and then directly completes the turning of the two reflectors.
The off-axis ellipsoidal reflector (10) is a part of an ellipsoid, the ellipsoid is formed by an elliptic curve rotating for a circle around a straight line where two focuses are positioned, and the ellipsoidThe straight line where the two focuses are positioned is superposed with the revolution center line Z of the V-shaped clamp (20), and one focus F of the ellipsoid1A reference line Z positioned on the positioning pin (21)1Upper, datum line Z1The included angle between the inclined plane and the center line Z is theta, which is equal to 90-theta and is an off-axis angle; the horizontal distance between the positioning pin (21) and the central line Z is L, and the distance is the off-axis distance of the ellipsoidal reflector.
In the above technical scheme: the off-axis ellipsoidal reflector fixes the V-shaped clamp through a through hole (23) on the inclined surface of the V-shaped clamp; the V-shaped clamp is connected with the fixed disc clamp through a through hole (32).
In the above technical scheme: the bottom surface of the V-shaped clamp (20) and the upper and lower surfaces of the disc clamp (30) can be turned by an ultra-precise single-point diamond lathe, so that the surface flatness is ensured.
The foregoing description is only an overview of the method of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the method can be implemented according to the contents of the description, and in order to make the above and other objects, features, and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic diagram of a device for processing an off-axis ellipsoidal reflector;
FIG. 2 is a cross-sectional view of the processing apparatus;
description of the labeling: 10. an off-axis ellipsoidal reflector; 20. a V-shaped clamp; 21. positioning pins of the V-shaped clamp; 22. a V-shaped clamp through hole; 23. a V-shaped clamp inclined plane through hole; 30. a disc clamp; 31. a disc clamp positioning pin; 32. the disc clamp is provided with a through hole.
Detailed description of the invention
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to the attached drawing 1, the related processing device comprises a precise V-shaped clamp (20) and a disc clamp (30), wherein the V-shaped clamp (20) comprises two inclined planes, and a positioning pin (21) and a through hole (22) are arranged on the inclined planes; the disc clamp (30) comprises a positioning pin (31) and a through hole (32); two off-axis ellipsoidal reflectors (10) to be machined, the diameters of which are D =19.2mm, are positioned by positioning pins (21) and then are simultaneously installed on a V-shaped clamp (20), then the V-shaped clamp (20) is connected with positioning pins (31) through a center positioning hole (22) and is combined with a disc clamp (30) to form a device, and the device is fixed on a vacuum chuck of a lathe and then directly completes the turning of the two reflectors.
Referring to fig. 2, the off-axis ellipsoidal reflector (10) is a part of an ellipsoid formed by a circle of an elliptic curve around a straight line where two focuses are located, and the formula of the elliptic curve is as follows:
whereina=55.11mm，b=32.24 mm; the straight line of the two focuses of the ellipsoid coincides with the revolution center line Z of the V-shaped clamp (20), and one focus F of the ellipsoid1A reference line Z positioned on the positioning pin (21)1Upper, datum line Z1The included angle between the inclined plane and the center line Z is equal to (90-theta) =69.31 degrees, and the included angle is an off-axis angle; the horizontal distance between the positioning pin (21) and the central line Z is L =24.07mm, and the distance is the off-axis distance of the ellipsoidal reflector.
Detailed description of the invention
Referring to the attached figure 3, the V-shaped clamp (20) is combined with the V-shaped clamp before rotation after rotating for 90 degrees around the rotation center, 4 off-axis ellipsoidal reflectors can be fixed on the inclined plane of the combined device at one time, and the processing efficiency can be greatly improved.
The embodiment of the invention can show that the processing device and the processing method of the off-axis ellipsoidal reflector have simple and compact integral structure, reasonable design of the V-shaped clamp and the disc clamp, elimination of repeated positioning errors, improvement of efficiency and great application potential in optical ultra-precision turning.
Claims (1)
1. A processing device and method of an off-axis ellipsoidal reflector are characterized in that: a group of precise mechanical devices suitable for turning off-axis ellipsoidal surfaces are adopted to finish the machining of off-axis ellipsoidal reflector, and the device comprises a precise V-shaped clamp (20) and a disc clamp (30); the V-shaped clamp (20) comprises two inclined planes, and a positioning pin (21) and a through hole (22) are arranged on each inclined plane; the disc clamp (30) comprises a positioning pin (31) and a through hole (32); two off-axis ellipsoidal reflectors (10) to be machined, the diameters of which are 19.2mm, are positioned by positioning pins (21) and then are simultaneously installed on a V-shaped clamp (20), then the V-shaped clamp (20) is connected with a positioning pin (31) through a central positioning hole (22) and is combined with a disc clamp (30) to form a device, and the device is fixed on a vacuum chuck of a lathe and then directly completes the turning of the two reflectors;
the off-axis ellipsoidal reflector (10) is a part of an ellipsoid, the ellipsoid is formed by an elliptic curve rotating for a circle around a straight line where two focuses are positioned, and the elliptic curve formula is as follows:
whereina=55.11mm，b=32.24 mm; the straight line of the two focuses of the ellipsoid coincides with the revolution center line Z of the V-shaped clamp (20), wherein one focus F1A reference line Z positioned on the positioning pin (21)1Upper, base line Z1The included angle between the inclined plane and the center line Z is equal to (90-theta) =69.31 degrees, and the included angle is an off-axis angle; the horizontal distance between the positioning pin (21) and the revolution center line Z is L =24.07mm, and the distance is the off-axis distance of the ellipsoidal reflector;
the parallelism error of the upper surface and the lower surface of the disc clamp (30) is controlled at the second level, and a counter bore is attached to the lower surface and is matched and fixed with a lathe sucker;
the precision V-shaped clamp (20) and the disc clamp (30) are both made of 304 stainless steel, and the off-axis ellipsoidal reflector (10) is made of aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246468.3A CN114589318B (en) | 2022-03-14 | 2022-03-14 | Processing method of off-axis ellipsoidal reflector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246468.3A CN114589318B (en) | 2022-03-14 | 2022-03-14 | Processing method of off-axis ellipsoidal reflector |
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| Publication Number | Publication Date |
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| CN114589318A true CN114589318A (en) | 2022-06-07 |
| CN114589318B CN114589318B (en) | 2023-09-15 |
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| CN202210246468.3A Active CN114589318B (en) | 2022-03-14 | 2022-03-14 | Processing method of off-axis ellipsoidal reflector |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07136804A (en) * | 1993-11-16 | 1995-05-30 | Canon Inc | Manufacture and device of polygon mirror |
| JP3098126U (en) * | 2003-02-14 | 2004-02-19 | デルタ エレクトロニクス インコーポレーテッド | Lighting system for lighting system |
| CN102049530A (en) * | 2010-11-03 | 2011-05-11 | 天津大学 | Precision turning processing method for off-axis aspheric mirror with large off-axis |
| CN102590911A (en) * | 2012-02-28 | 2012-07-18 | 天津微纳制造技术有限公司 | Manufacturing method of high-efficiency retroreflection cube-corner microprism |
| CN106989693A (en) * | 2017-05-12 | 2017-07-28 | 中国工程物理研究院激光聚变研究中心 | A kind of off-axis ellipsoidal mirror surface shape detection apparatus and its detection method |
| CN110666987A (en) * | 2019-09-12 | 2020-01-10 | 深圳市东汇精密机电有限公司 | Production process of special-shaped lens |
| JP2021192921A (en) * | 2020-06-09 | 2021-12-23 | シヤチハタ株式会社 | Focal point positioning jig for laser processing machine |
| CN113967852A (en) * | 2021-10-13 | 2022-01-25 | 苏州科技大学 | Metal multi-surface reflecting prism processing device and method |
-
2022
- 2022-03-14 CN CN202210246468.3A patent/CN114589318B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07136804A (en) * | 1993-11-16 | 1995-05-30 | Canon Inc | Manufacture and device of polygon mirror |
| JP3098126U (en) * | 2003-02-14 | 2004-02-19 | デルタ エレクトロニクス インコーポレーテッド | Lighting system for lighting system |
| CN102049530A (en) * | 2010-11-03 | 2011-05-11 | 天津大学 | Precision turning processing method for off-axis aspheric mirror with large off-axis |
| CN102590911A (en) * | 2012-02-28 | 2012-07-18 | 天津微纳制造技术有限公司 | Manufacturing method of high-efficiency retroreflection cube-corner microprism |
| CN106989693A (en) * | 2017-05-12 | 2017-07-28 | 中国工程物理研究院激光聚变研究中心 | A kind of off-axis ellipsoidal mirror surface shape detection apparatus and its detection method |
| CN110666987A (en) * | 2019-09-12 | 2020-01-10 | 深圳市东汇精密机电有限公司 | Production process of special-shaped lens |
| JP2021192921A (en) * | 2020-06-09 | 2021-12-23 | シヤチハタ株式会社 | Focal point positioning jig for laser processing machine |
| CN113967852A (en) * | 2021-10-13 | 2022-01-25 | 苏州科技大学 | Metal multi-surface reflecting prism processing device and method |
Non-Patent Citations (2)
| Title |
|---|
| 张效栋;房丰洲;魏桂爽;程颖: "离轴非球面镜子母同体超精密车削加工法", 机械科学与技术, vol. 29, no. 11 * |
| 陈宝华;吴泉英;唐运海;范君柳;王军;孙毅: "大离轴量非球面反射镜的加工方法", 光学精密工程, no. 005 * |
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| CN114589318B (en) | 2023-09-15 |
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