EP1062670A1 - Procede d'assemblage d'un ensemble optique comprenant des coquilles coaxiales, notamment pour telescope a rayons x - Google Patents
Procede d'assemblage d'un ensemble optique comprenant des coquilles coaxiales, notamment pour telescope a rayons xInfo
- Publication number
- EP1062670A1 EP1062670A1 EP99958321A EP99958321A EP1062670A1 EP 1062670 A1 EP1062670 A1 EP 1062670A1 EP 99958321 A EP99958321 A EP 99958321A EP 99958321 A EP99958321 A EP 99958321A EP 1062670 A1 EP1062670 A1 EP 1062670A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shell
- support
- measurement
- optical assembly
- mirror
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/06—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diffraction, refraction or reflection, e.g. monochromators
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49764—Method of mechanical manufacture with testing or indicating
- Y10T29/49771—Quantitative measuring or gauging
Definitions
- the present invention relates to a method for assembling an optical assembly having first and second longitudinal ends and comprising N coaxial shells, forming as many elementary mirrors, and each of which extends between said first and second ends and has at said first end a first diameter and at said second end a second diameter greater than the first, the shells can be complete cylinders or cylinder segments.
- Such an optical assembly is in particular known as a WOLTER I type telescope mirror for which each elementary mirror is an X-ray mirror in grazing incidence and is in the form of a surface of revolution having a parabolic region of revolution ( on the side of the second end of larger diameter) and a hyperbolic region of revolution (on the side of the first end of smaller diameter).
- each shell starting with the one that is most in the center, is measured, then positioned by its second end and fixed on a support, integration taking place from the center outwards.
- optical performance of the individual shells must be optimal before integration, which requires manufacturing according to the highest quality standards.
- the subject of the present invention is an integration method which makes it possible to carry out measurements and possibly to make corrections each time a new shell is integrated.
- the invention thus relates to a method of assembling an optical assembly having first and second longitudinal ends comprising N coaxial shells forming elementary mirrors and each of which extends between said first and second ends and has at said first end a first diameter and at said second opposite end a second diameter greater than the first, characterized in that it comprises: 1 / the establishment, on a support, by its first end, of the first shell located the outermost of the optical assembly 2 / the positioning on the support, by its first end, inside the first shell, of the second shell which is immediately adjacent to it in the optical assembly.
- the shells being integrated from the one which is the most outside towards that which is the most inside, the shells being maintained on the support at least by their side of smaller diameter, their internal surface, which is the surface active reflective, remains accessible as long as the following shell is not provided, and it is therefore possible to carry out on the shell any corrective or complementary operation which could be deemed useful.
- the method can be characterized in that at least one said positioning comprises: a) the positioning of said shell on the support b) a topography measurement of the internal surface of said shell positioned on the support c) if necessary, repositioning of said shell on the support as a function of the result of said topography measurement, and c ') fixing its position on the support.
- at least one said positioning comprises, after said fixing of its position on the support: d) a measurement of the topography of the internal surface of said shell fixed on the support e ) where appropriate, ion machining of the internal surface of said shell to correct the initial defects of the shells and / or those generated by integration.
- the method comprises: f) the application of a reflective coating on the internal face of said shell and optionally, after f): g) an optical verification of said shell.
- Said method can preferably be characterized in that said topography measurement implements a differential measurement by scanning the internal surface of said shell and of a reference cylinder disposed on the support at a reference position, said differential measurement being performed without contact using sensors which are carried by a measuring table whose movements are identified with respect to said reference cylinder.
- At least one shell may have at least one extension at at least one of its longitudinal ends.
- the method can be characterized in that at least one shell consists of several elements extending between the first and second ends and each of which occupies part of the periphery of said shell and in that these elements have at least one extension disposed at at least one of their longitudinal ends and at least one of their lateral edges.
- Such extensions constitute mechanical fastening elements.
- At least one said extension disposed at a longitudinal end can constitute a baffle for attenuating stray light.
- FIG. 1 shows a module for XMM telescope
- FIG. 2a to 2c illustrate the integration process according to the invention
- FIG. 3 shows a measuring device adapted to the method according to the invention
- FIG. 4 shows an embodiment of part of an elementary mirror
- the current trend in space astronomy is to develop optical systems having a large collecting surface with a resolution of less than one arc second. This generally involves the manufacture of a large number of high quality mirrors, which operate in a thermally stabilized environment, with gradients below 0.2 ° C and at temperatures which can reach -80 ° C.
- One of the problems with these mirrors is their manufacturing cost.
- the present invention provides a method of integrating mirrors which is particularly, but not exclusively, suitable for an optic 1 using mirrors of the WOLTER I type, operating in the energy band of between 0.003 keV and 100 keV (c ' that is to say wavelengths between 400 nm and 0.01 nm). Individual mirrors of revolution or shells (Mi ...
- Each individual mirror (Mi ... MN) is a thin mirror, such a mirror being defined as having a ratio between its thickness and its mean radius of curvature, which is less than 1/50.
- a dispersive network 11 and two CCD charge coupled sensors 12 and 14 are arranged to collect the x-rays, respectively, not dispersed and dispersed.
- a technique for manufacturing and integrating such mirrors is described in the aforementioned article by D. de Chambure. The problems of integrating such mirrors are as follows:
- the present invention provides a method which makes it possible to improve the integration and possibly the final correction of elementary mirrors to form a module.
- the mirrors are integrated on a support 20 in N successive stages, starting with the mirror of larger dimensions Mi (see FIG. 2a), that is to say the one which is located furthest out of the module 10, and placing it by its first end, or downstream end 5, of smaller diameter, and proceeding step by step (Mi, M 2 , M 3 , ...) to the Neme mirror which is placed on its downstream end 5 (see Figures 2b and 2c).
- each shell 1 which has just been integrated on the support 20 is accessible in order to carry out measurements of the shell which has just been integrated, using a device (34, 35) which will be described later (in conjunction with Figure 3) and make any corrections. It is possible to apply a deformation to the support 20 to compensate for the additional load due to the weight of the elementary mirrors as they are integrated, or alternatively by rotating the support 20 so as to take account of any difference between the optical axis of a mirror to be integrated and the vertical axis.
- the correction on the elementary mirrors can be carried out by ion polishing of each mirror after its integration.
- Ion polishing has the advantage of not degrading the micro-roughness of the polished surfaces, provided, however, that the removal rate and the quantity of material to be removed are kept within reasonable limits. It is also a contactless and edge-free correction method.
- FIG. 4 shows an elementary mirror of the WOLTER I type which is formed of elements 40 constituting cylinder segments occupying a fraction of the periphery and each of which has a region 42 of parabolic section and a region 43 of section hyperbolic.
- the edge 44 of the region 42 is extended by a lug 46 for its attachment to a part which comes to cover all of the mirrors, while the edge 45 of the region 43 is extended by a lug 47 for its attachment to the support 20.
- the regions 42 and 43 are extended by fixing lugs 48 and 49 respectively.
- FIG. 5 represents an elementary mirror of the WOLTER I type forming a complete cylinder and having upstream 56 and downstream 57 mounting lugs, connected by upstream 54 and downstream edges 55 to a region of parabolic section 52 and to a region of hyperbolic section 53.
- the tabs 46 to 49, 56 and 57 can allow temperature control as close as possible to the optics.
- the tabs 46, 47, 56 and 57 can also make it possible to limit the amount of stray light which penetrates the module.
- a such an optical baffle can be made in one piece with an elementary mirror, for example by electroforming. It is then possible after integration to treat the optical baffle, located on the side of the upstream end 4, the mirror being placed on the downstream end 5. This machining treatment to impart controlled roughness to the internal surface of the baffle can be carried out by ionic machining, during the ionic machining operation of the reflecting surface of the mirror.
- a coating known per se, to give it characteristics of. high reflectivity over a wide bandwidth.
- a coating implements the application of one or more layers, for example metallic.
- the support for the mirrors 20 (cf. FIG. 3) has a device 39 for compensating for the deformation induced by the weight of the elementary mirrors which are successively integrated.
- the support 20 carries a reference cylinder 33 which faces the optical surface 37 'of the mirror 37 which has just been integrated and whose axis 33' is preferably parallel to the optical axis X common to the elementary mirrors (Mi ... MN).
- the mirrors are held at points distributed possibly evenly on their edges and they are moved down parallel to the X axis using the cylinder 33 as a reference in the horizontal Y and Z axes so as to ensure that the mirror being integrated is deposited following the required path which allows it to be placed without touching the previously integrated mirrors.
- the topography of its active surface 37 ′ is measured by scanning using non-contact gauges and the reference cylinder 33. The measurement of the topography can also be carried out by an optical test.
- the optimal position of the mirror 37 is calculated and the handling tools reposition it if necessary.
- the mirror 37 is then fixed in position by gluing or by mechanical fixing, for example by screws.
- the handling tool is then decoupled from the mirror
- the weight of the mirror 37 is transferred to the support 20, resulting in a deformation of the latter.
- This deformation is measured and the deformation device 39 produces compensation forces to return the support 20 to its initial state.
- the integration of the mirror 37 has generated small angle errors and small local deformations of the mirror, of the order of a few microns, in the vicinity of its anchoring points.
- the measurement system 30 is then moved away, and a machining head is put in place. It includes a positioning device in X, Y and Z for positioning the machining head relative to the reference cylinder 33. As a variant, the machining head can be mounted on the measurement device by scanning, which makes it possible to perform this machining immediately after the topography measurement step.
- the coating head can be installed on the machining head, in which case, the assembly can be a robot which is capable of carrying out all of the operations (topography measurement, machining, coating) without breaking the vacuum, where optimal cleanliness, which adds to a significant time saving.
- the support 20 can be tilted by an inclination device 38, in the case of systems, in particular with open surface mirrors, for which two successive mirrors can have different angles between their optical axis and the vertical.
- the scanning device 30 can be as shown in FIG.
- Figure 3 It comprises a main table 31 equipped with a non-contact type centering sensor 32 for locating the position of the table 31 relative to the reference cylinder 33 placed on the support 20.
- the table 31 is movable in rotation around an axis parallel to the axis 33 'of the reference cylinder 33, which produces an azimuth displacement of the measuring head. The azimuth angle is measured by an angular sensor.
- the main table 31 carries at least one arm 34 movable in translation along the longitudinal axis of the table 31.
- the arm 34 carries a measurement table 35 which is mounted on a bench equipped with two motors and which is movable by on the one hand vertically along the longitudinal axis of arm 34, and on the other hand horizontally.
- the measurement table 35 carries three sensors referenced A, B and C.
- the sensor A is a short-range sensor, for example of the laser type, of the magnetic type or even of the capacitive type and which faces the optical surface 37 ′ of the individual mirror 37 being integrated.
- the movements of the table 35 are controlled so that the distance d between the sensor A and the surface 37' remains constant, and therefore that the distance between the measurement table 35 and the surface 37 'remains constant.
- the sensor B for example of the laser type, is used to determine the distance D between the table 35 and the reference cylinder 33.
- the distance between the optical surface 37 'of the mirror and the axis 33' is therefore equal to the distance d, the greater the distance D 0 (constant) between sensors A and B, the greater the distance D, the smaller the radius r of the reference cylinder 33.
- Sensor C for example of the laser type, is used to measure the vertical distance between the measuring table 35 and the support 20.
- the azimuth angle, and the values supplied by sensors B and C are read at regular intervals , which allows to find the coordinates (x, y, z) of the corresponding point of the surface 37 'of the mirror
- the table 35 may carry an arm comprising the machining head, the coating head and sensors B ′ and C similar to the sensors B and C.
- the sensor A is in this case superfluous since at this time the topography of the surface of the mirror is known and the positioning of the arm only requires the azimuth angle values (provided by table 35) and the data measured by the sensors B 'and C.
- the method according to the invention can also be applied in part for non-optical surfaces.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Optical Elements Other Than Lenses (AREA)
- Telescopes (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9900085 | 1999-01-07 | ||
FR9900085A FR2788348B1 (fr) | 1999-01-07 | 1999-01-07 | Procede d'assemblage d'un ensemble optique comprenant des coquilles coaxiales, notamment pour telescope a rayon x |
PCT/FR1999/003129 WO2000041186A1 (fr) | 1999-01-07 | 1999-12-14 | Procede d'assemblage d'un ensemble optique comprenant des coquilles coaxiales, notamment pour telescope a rayons x |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1062670A1 true EP1062670A1 (fr) | 2000-12-27 |
EP1062670B1 EP1062670B1 (fr) | 2003-03-26 |
Family
ID=9540668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99958321A Expired - Lifetime EP1062670B1 (fr) | 1999-01-07 | 1999-12-14 | Procede d'assemblage d'un ensemble optique comprenant des coquilles coaxiales, notamment pour telescope a rayons x |
Country Status (11)
Country | Link |
---|---|
US (1) | US6449826B1 (fr) |
EP (1) | EP1062670B1 (fr) |
JP (1) | JP2002534694A (fr) |
AT (1) | ATE235737T1 (fr) |
CA (1) | CA2322445A1 (fr) |
DE (1) | DE69906261T2 (fr) |
DK (1) | DK1062670T3 (fr) |
ES (1) | ES2192406T3 (fr) |
FR (1) | FR2788348B1 (fr) |
RU (1) | RU2225629C2 (fr) |
WO (1) | WO2000041186A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20050009848A (ko) * | 2003-07-18 | 2005-01-26 | 한국전광(주) | 두 비구면으로 분리 구성된 볼터거울과 그 가공방법 |
EP2290420B1 (fr) | 2009-08-28 | 2016-07-27 | European Space Agency | Procédé d'assemblage d'une pile à plaque-miroir |
RU2541438C1 (ru) * | 2013-07-24 | 2015-02-10 | Федеральное Государственное унитарное предприятие "Российский Федеральный ядерный центр-Всероссийский научно-исследовательский институт экспериментальной физики-ФГУП "РФЯЦ-ВНИИЭФ" | Способ сборки зеркального модуля рентгеновского телескопа, содержащего n коаксиальных вкладышей, образующих элементарные зеркала |
RU2629693C1 (ru) * | 2016-10-13 | 2017-08-31 | Федеральное государственное унитарное предприятие "Российский Федеральный ядерный центр - Всероссийский научно-исследовательский институт экспериментальной физики" (ФГУП "РФЯЦ-ВНИИЭФ") | Способ сборки рентгеновской оптической системы, содержащей n зеркальных модулей |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3657792A (en) * | 1970-11-13 | 1972-04-25 | Identicon Corp | Scanning mirror alignment techniques |
US3864576A (en) * | 1973-09-27 | 1975-02-04 | Rinn Corp | Position indicating device for dental x-ray machines |
US4977512A (en) * | 1987-02-05 | 1990-12-11 | Shibuya Kogyo Co., Ltd. | Three dimensional simultaneous machining and measuring system |
DE3711164A1 (de) * | 1987-04-02 | 1988-10-20 | Zeiss Carl Fa | Steckelementeinrichtung zur halterung von bauteilen in stapeln |
JP2753306B2 (ja) * | 1988-03-18 | 1998-05-20 | 株式会社日立製作所 | イオンビーム加工方法及び集束イオンビーム装置 |
JPH0631887B2 (ja) * | 1988-04-28 | 1994-04-27 | 株式会社東芝 | X線ミラー及びその製造方法 |
US5033074A (en) * | 1989-12-04 | 1991-07-16 | Gte Laboratories Incorporated | X-ray colllimator for eliminating the secondary radiation and shadow anomaly from microfocus projection radiographs |
US5532815A (en) * | 1994-06-17 | 1996-07-02 | Kdy Associates, Inc. | System and method for aligning a first surface with respect to a second surface |
US5747821A (en) * | 1995-08-04 | 1998-05-05 | X-Ray Optical Systems, Inc. | Radiation focusing monocapillary with constant inner dimension region and varying inner dimension region |
JP3634487B2 (ja) * | 1996-02-09 | 2005-03-30 | キヤノン株式会社 | 位置合せ方法、位置合せ装置、および露光装置 |
EP1053551B1 (fr) * | 1998-01-27 | 2008-12-17 | Noran Instruments, Inc. | Spectrometre a rayons x dispersif en longueur d'onde, pourvu d'une optique a collimateur de rayons x destinee a augmenter la sensibilite sur une large gamme d'energie a rayons x |
-
1999
- 1999-01-07 FR FR9900085A patent/FR2788348B1/fr not_active Expired - Fee Related
- 1999-12-14 CA CA002322445A patent/CA2322445A1/fr not_active Abandoned
- 1999-12-14 US US09/622,167 patent/US6449826B1/en not_active Expired - Fee Related
- 1999-12-14 WO PCT/FR1999/003129 patent/WO2000041186A1/fr not_active Application Discontinuation
- 1999-12-14 JP JP2000592839A patent/JP2002534694A/ja active Pending
- 1999-12-14 RU RU2000125571/06A patent/RU2225629C2/ru not_active IP Right Cessation
- 1999-12-14 DE DE69906261T patent/DE69906261T2/de not_active Expired - Lifetime
- 1999-12-14 AT AT99958321T patent/ATE235737T1/de not_active IP Right Cessation
- 1999-12-14 DK DK99958321T patent/DK1062670T3/da active
- 1999-12-14 ES ES99958321T patent/ES2192406T3/es not_active Expired - Lifetime
- 1999-12-14 EP EP99958321A patent/EP1062670B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0041186A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6449826B1 (en) | 2002-09-17 |
CA2322445A1 (fr) | 2000-07-13 |
FR2788348A1 (fr) | 2000-07-13 |
DE69906261D1 (de) | 2003-04-30 |
FR2788348B1 (fr) | 2001-03-02 |
DK1062670T3 (da) | 2003-07-14 |
ES2192406T3 (es) | 2003-10-01 |
DE69906261T2 (de) | 2003-12-04 |
WO2000041186A1 (fr) | 2000-07-13 |
EP1062670B1 (fr) | 2003-03-26 |
ATE235737T1 (de) | 2003-04-15 |
JP2002534694A (ja) | 2002-10-15 |
RU2225629C2 (ru) | 2004-03-10 |
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