WO1998013714A1 - Dispositif support pour miroir astronomique - Google Patents

Dispositif support pour miroir astronomique

Info

Publication number
WO1998013714A1
WO1998013714A1 PCT/EP1997/004854 EP9704854W WO9813714A1 WO 1998013714 A1 WO1998013714 A1 WO 1998013714A1 EP 9704854 W EP9704854 W EP 9704854W WO 9813714 A1 WO9813714 A1 WO 9813714A1
Authority
WO
WIPO (PCT)
Prior art keywords
mirror
mounting elements
mounting
storage according
attached
Prior art date
Application number
PCT/EP1997/004854
Other languages
German (de)
English (en)
Inventor
Hans-Jürgen Meier
Original Assignee
Carl Zeiss
Carl-Zeiss-Stiftung Handelnd Als Carl Zeiss
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 Carl Zeiss, Carl-Zeiss-Stiftung Handelnd Als Carl Zeiss filed Critical Carl Zeiss
Publication of WO1998013714A1 publication Critical patent/WO1998013714A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • G02B7/183—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors specially adapted for very large mirrors, e.g. for astronomy, or solar concentrators

Definitions

  • the invention relates to a mounting for an astronomical mirror with a plurality of mounting elements attached below the underside of the mirror, in which the lines of action of the mounting elements pass through the overall center of gravity of the mirror and in which the mirror is mounted both axially laterally and in a rotationally secure manner.
  • Astronomical mirror bearings couple the mirror cell and the mirror with six degrees of freedom and generally consist of an axial support system, which bears the main load of the mirror, two lateral support systems, which are arranged perpendicular to each other and to the axial system, and an anti-rotation system.
  • the two lateral support systems usually only have half the number of axial support points and are arranged in such a way that their lines of action go through the entire center of gravity of the mirror so that no moments occur in the mirror body.
  • One of the two lateral systems is designed in two parts to jointly cover the degree of freedom of rotation.
  • All positioning forces are individually coupled to the mirror and are combined with one another in such a way that there are no couplings with more than six degrees of freedom between the mirror and the cell.
  • Such mirror bearings are e.g. known from DE 36 03 217 and EP 0 317 493.
  • the invention is made possible by a metallic auxiliary structure, which due to its thermal properties can be glued directly to the mirror at three points. This is known from DE 29 603 024. If at least three such structures are attached to a mirror, three mutually orthogonal degrees of freedom can be combined on each auxiliary structure in such a way that all lines of action run through a partial center of gravity of the mirror.
  • each of the three spatial directions supports a partial focus of the mirror, which in turn is defined by the focus of the three attachment points of the auxiliary structure together with the focus of the auxiliary structure itself.
  • auxiliary structures are glued to the mirror, there are 18 bearing points between the mirror and the six auxiliary structures, but only six points per spatial direction for the entire support system. Of these 18 storage points in total, six are verified by fixed connections, which must be selected independently of one another so that the required six degrees of freedom for the coupling between the mirror and the cell arise.
  • the remaining 12 bearing points are equipped with force actuators, based on the proven hydraulic or mechanical concept. This means that only 12 active support actuators are required, compared to 18 axial plus 2 x 9 lateral of a conventional hydraulic bearing. This reduction of the effort by a factor of three is the central point of the invention which is made possible by the dimensionally stable auxiliary structure.
  • FIG. 1 shows a side section through a mirror with the storage according to the invention.
  • Fig. 2 shows the storage points of an inventive storage of an astronomical mirror by means of a hydraulic support system.
  • Stress-free storage (as is known, for example, from DE 296 03 024) can be used very advantageously for mounting an astronomical mirror, as shown in FIG. 1.
  • the stress-free mounting can be glued directly to the mirror at three points (44, 45 in FIG. 1, the third mounting point is not shown in the figure). If at least three such structures (44, 45) are attached to a mirror (41), three degrees of freedom that are orthogonal to each other can be combined on each tension-free mounting such that all lines of action run through a partial center of gravity of the mirror (41).
  • the astronomical mirror (41) shown in FIG. 1 has dimensionally stable auxiliary structures (44, 45) on its underside, which are also referred to as stress-free bearings.
  • the mirror (41) is a lightweight mirror, which has a closed, mirrored surface (41.1) and a closed, level surface Has the underside of the mirror (41.2). These two outer surfaces are connected to each other by ribs (41.3).
  • the circular mirror (41) has an opening (42) in its center.
  • the mirror (41) is shown in a tilted position of 42.5 ° relative to the horizon.
  • the dimensionally stable auxiliary structures (44, 45) are connected to the mirror cell (43) via connections (48, 49, 50, 51). On or in the mirror body (41) itself, they are attached directly to the corresponding points (46), the attachment point in the focal plane (52) of the mirror
  • Each of the dimensionally stable auxiliary structures (44, 45) is made of titanium in the upper part (44 ') and in the lower part
  • the mirror (41) can be separated from the mirror cell (43) along the dividing line (47).
  • connections (48, 49; 50, 51) shown in FIG. 1 are actuators, which can be mechanical or hydraulic.
  • the connections (48, 49; 50, 51) of a dimensionally stable auxiliary structure (44, 45) each produce a partial center of gravity (47 1 , 47 1 '), which lies in the focal plane (52).
  • FIG. 2 describes a mirror support system which uses six dimensionally stable auxiliary structures which have hydrostatic actuators.
  • the support systems that support one degree of freedom are each identified by the same number.
  • the six degrees of freedom are distributed so that in the main load direction (e.g. when using the bearing in one Airplane) three hydraulic circuits with the actuator pairs (61 '', 62 '') and (63 '').
  • the two circles (64 ′′) and (65 ′′) act in the first lateral direction; only a circle (66 '') then acts in the second lateral direction.

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Astronomy & Astrophysics (AREA)
  • Sustainable Development (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Telescopes (AREA)

Abstract

L'invention concerne un dispositif support pour un miroir astronomique (41), comprenant une pluralité d'éléments supports (48, 49; 50, 51) disposés au-dessous de la partie inférieure du miroir, dans lequel les lignes d'action des éléments supports passent par le centre de gravité général du miroir, et dans lequel le miroir (41) est monté immobilisé en rotation axialement et latéralement. L'invention est caractérisée en ce qu'entre le miroir et les éléments supports sont disposées au moins trois structures auxiliaires à stabilité dimensionnelle (44, 45) sans déformation thermique dans le plan du centre de gravité (52), en ce que les structures sont fixées directement sur le miroir à supporter (41), et en ce que trois éléments d'actionnement (48, 49; 50, 51) sont disposés entre les éléments supports du miroir et chaque structure auxiliaire.
PCT/EP1997/004854 1996-09-27 1997-09-06 Dispositif support pour miroir astronomique WO1998013714A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996139864 DE19639864A1 (de) 1996-09-27 1996-09-27 Lagerung für einen astronomischen Spiegel
DE19639864.9 1996-09-27

Publications (1)

Publication Number Publication Date
WO1998013714A1 true WO1998013714A1 (fr) 1998-04-02

Family

ID=7807148

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/004854 WO1998013714A1 (fr) 1996-09-27 1997-09-06 Dispositif support pour miroir astronomique

Country Status (2)

Country Link
DE (1) DE19639864A1 (fr)
WO (1) WO1998013714A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7604359B2 (en) 2004-05-04 2009-10-20 Carl Zeiss Smt Ag High positioning reproducible low torque mirror-actuator interface
CN103207440A (zh) * 2013-04-18 2013-07-17 大连理工大学 一种双向多拱形大口径空间反射镜
CN109239908A (zh) * 2018-10-22 2019-01-18 中国科学院上海技术物理研究所 一种极端温度环境下反射式望远镜的支撑装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012025493A1 (de) * 2012-12-21 2014-06-26 Manfred Steinbach Präzisionshalterung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039252B (de) * 1956-12-19 1958-09-18 Askania Werke Ag Lagerung fuer Fernrohrspiegel
DE3603217A1 (de) * 1986-01-31 1986-09-18 Christoph Dipl.-Phys. 7928 Giengen Kühne Halb-monolithisches spiegelteleskop
EP0317493A1 (fr) * 1987-11-20 1989-05-24 Hermann Hügenell Miroir primaire pour téléscope à miroir
EP0349825A2 (fr) * 1988-07-02 1990-01-10 Dornier Gmbh Ensemble pour palier déchargé pour des réflecteurs ou des miroirs tournants de haute précision pour télescopes
EP0466003A2 (fr) * 1990-07-10 1992-01-15 Firma Carl Zeiss Support pour miroir primair d'un téléscope
EP0642048A1 (fr) * 1993-09-04 1995-03-08 Carl Zeiss Système de support d'un miroir avec pesons
DE29603024U1 (de) * 1996-02-21 1996-04-18 Fa. Carl Zeiss, 89518 Heidenheim Spannungsfreie Lagerung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039252B (de) * 1956-12-19 1958-09-18 Askania Werke Ag Lagerung fuer Fernrohrspiegel
DE3603217A1 (de) * 1986-01-31 1986-09-18 Christoph Dipl.-Phys. 7928 Giengen Kühne Halb-monolithisches spiegelteleskop
EP0317493A1 (fr) * 1987-11-20 1989-05-24 Hermann Hügenell Miroir primaire pour téléscope à miroir
EP0349825A2 (fr) * 1988-07-02 1990-01-10 Dornier Gmbh Ensemble pour palier déchargé pour des réflecteurs ou des miroirs tournants de haute précision pour télescopes
EP0466003A2 (fr) * 1990-07-10 1992-01-15 Firma Carl Zeiss Support pour miroir primair d'un téléscope
EP0642048A1 (fr) * 1993-09-04 1995-03-08 Carl Zeiss Système de support d'un miroir avec pesons
DE29603024U1 (de) * 1996-02-21 1996-04-18 Fa. Carl Zeiss, 89518 Heidenheim Spannungsfreie Lagerung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7604359B2 (en) 2004-05-04 2009-10-20 Carl Zeiss Smt Ag High positioning reproducible low torque mirror-actuator interface
US7699480B2 (en) 2004-05-04 2010-04-20 Carl Zeiss Smt Ag High positioning reproducible low torque mirror-actuator interface
US8256912B2 (en) 2004-05-04 2012-09-04 Carl Zeiss Smt Gmbh High positioning reproducible low torque mirror-actuator interface
CN103207440A (zh) * 2013-04-18 2013-07-17 大连理工大学 一种双向多拱形大口径空间反射镜
CN109239908A (zh) * 2018-10-22 2019-01-18 中国科学院上海技术物理研究所 一种极端温度环境下反射式望远镜的支撑装置

Also Published As

Publication number Publication date
DE19639864A1 (de) 1998-04-02

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