JP3603773B2

JP3603773B2 - Reflector support mechanism

Info

Publication number: JP3603773B2
Application number: JP2000316563A
Authority: JP
Inventors: 利崇仲尾次; 一博永江
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2000-10-17
Filing date: 2000-10-17
Publication date: 2004-12-22
Anticipated expiration: 2020-10-17
Also published as: JP2002122770A

Description

【０００１】
【発明の属する技術分野】
この発明は、宇宙空間に配置して使用する光学反射式望遠鏡の反射鏡を鏡面精度の低下を抑えて支持することができる反射鏡支持機構に関するものである。
【０００２】
【従来の技術】
図７は従来の反射鏡支持機構を示す断面図である。図７において、１は反射鏡であり、２は反射鏡支持機構に反射鏡を取り付けるための反射鏡側取付台座、３は支持機構側取付台座、４は反射鏡側取付台座２と支持機構側取付台座３とを挟み込んで固定するＵ字形固定部材である。５は取付台座の座面の傾斜を調整するための転がり軸受である。また、６は反射鏡の変形による荷重発生を吸収する弾性体であり、反射鏡支持機構の固定側と反射鏡側との間に設けられている。この図７に示す弾性体６は板ばね式のものである。
【０００３】
反射鏡支持機構に反射鏡を取り付ける際、反射鏡側取付台座２と支持機構側取付台座３のそれぞれの当接面が互いに傾斜していると、これらをＵ字形固定部材４により固定したときに主反射鏡に変形が生じてしまう。これを防止するために、反射鏡支持機構には転がり軸受５が設けられており、この転がり軸受５により支持機構側取付台座３を回転させて、その当接面を任意の傾斜に設定することができる。さらに反射鏡１を反射鏡支持機構に取り付けた後であっても、反射鏡１自身に熱変形が生じたり、あるいは望遠鏡視野方向を変更するために反射鏡１を傾ける際、重力の作用によって自重変形を生じたりする。これらの変形によって、反射鏡１と反射鏡支持機構との相対関係において相対回転角を生じたり、並進方向ずれを生じる。相対回転角は転がり軸受５によって支持機構側取付台座３が回転して吸収される。また、並進方向ずれについても弾性体６によって許容変形内であれば吸収し、反射鏡１の鏡面精度を維持する。
【０００４】
【発明が解決しようとする課題】
従来の反射鏡支持機構は、上記のように転がり軸受５を組み込んでいる。この光学反射式望遠鏡を宇宙空間に配置して使用する場合、反射鏡支持機構が真空状態に晒される。真空状態では、反射鏡支持機構の転がり軸受５は内部の潤滑油が蒸発し、焼き付きを生じて可動部分が動かなくなることがあり、反射鏡が熱膨張等により変形した場合に鏡面精度が劣化し、望遠鏡としての性能を保てなくなるという問題点があった。
【０００５】
この発明は上記のような問題点を解決するためになされたものであり、転がり軸受を使用することが困難な宇宙空間において、反射鏡の熱変形による鏡面精度の低下を抑えることができる反射鏡支持機構を得ることを目的とする。
【０００６】
【課題を解決するための手段】
請求項１の発明に係る反射鏡支持構造は、反射鏡支持台と、この反射鏡支持台に固定され、望遠鏡の反射鏡の側面３点に設けられて反射鏡を支持する反射鏡支持機構とを備えた反射鏡支持構造であって、上記反射鏡支持機構はそれぞれ、望遠鏡の反射鏡の側面において反射鏡に取り付ける反射鏡取付部と、上記反射鏡取付部と上記反射鏡支持台とを連結する連結部材と、１軸まわりに弾性回転する弾性体軸受であって、上記反射鏡取付部と上記連結部材との連結箇所に設けられ、上記反射鏡取付部を上記連結部材に対して上記反射鏡の円周接線方向の軸まわりに回転する第１の弾性体軸受と、１軸まわりに弾性回転する弾性体軸受であって、上記連結部材と上記反射鏡支持台との連結箇所に設けられ、上記連結部材を上記反射鏡支持台に対して上記反射鏡の円周接線方向の軸まわりに回転する第２の弾性体軸受とを具備したものである。
【０００７】
請求項２の発明に係る反射鏡支持構造は、請求項１の発明に係る反射鏡支持構造において、上記反射鏡取付部は、上記反射鏡に取り付ける当接部材と、この当接部材を上記反射鏡の半径方向の軸まわりに回転する第３の弾性体軸受とを具備したものである。
【０００８】
請求項３の発明に係る反射鏡支持構造は、請求項１の発明に係る反射鏡支持構造において、上記反射鏡取付部は、上記反射鏡を取り付ける当接部材と、この当接部材を上記反射鏡の光軸方向の軸まわりに回転する第４の弾性体軸受とを具備したものである。
【０００９】
請求項４の発明に係る反射鏡支持機構は、望遠鏡の反射鏡の側面において反射鏡に取り付ける反射鏡取付部と、上記反射鏡取付部と反射鏡支持台とを連結する連結部材と、１軸まわりに弾性回転する弾性体軸受であって、上記反射鏡取付部と上記連結部材との連結箇所に設けられ、上記反射鏡取付部を上記連結部材に対して上記反射鏡の円周接線方向の軸まわりに回転する第１の弾性体軸受と、１軸まわりに弾性回転する弾性体軸受であって、上記連結部材と上記反射鏡支持台との連結箇所に設けられ、上記連結部材を上記反射鏡支持台に対して上記反射鏡の円周接線方向の軸まわりに回転する第２の弾性体軸受とを備え、上記反射鏡取付部は、上記反射鏡を取り付ける当接部材と、この当接部材を上記反射鏡の光軸方向の軸まわりに回転する第４の弾性体軸受とを具備したものである。
【００１３】
【発明の実施の形態】
実施の形態１．
この発明の実施の形態１に係る反射鏡支持機構を図１から図４によって説明する。図１は実施の形態１に係る反射鏡支持機構を含む反射鏡支持構造を示す構成図である。図２は実施の形態１に係る反射鏡支持機構の構成を示す構成図であり、図３は実施の形態１に係る反射鏡支持機構を含む反射鏡支持構造の支持原理を示す模式図、図４は実施の形態１に係る反射鏡支持機構の断面図である。図１において、７は反射鏡支持機構、８は反射鏡１及び反射鏡支持機構７を取付ける反射鏡支持台である。また、反射鏡１において、９は反射鏡面、１０は反射鏡面を支えるバックストラクチャである。
【００１４】
図１に示すように、反射鏡支持機構７は反射鏡１の側面において３箇所に設け、反射鏡支持台８に取り付けている。反射鏡１は、薄い反射鏡面９と、その反射鏡面９の背面に設けられ、反射鏡面９を支えるバックストラクチャ１０から構成されており、バックストラクチャ１０は、構造的に高剛性とするためにある程度の厚みを確保している。このバックストラクチャ１０の側面（即ち、反射鏡１の円周における反射鏡半径方向に垂直な面）に反射鏡支持機構７を設けることによりコンパクトな構成を得る。この反射鏡支持機構７は、図７に示す従来の反射鏡支持機構と同様に反射鏡１の背面に設けることもできるが、反射鏡１、反射鏡支持機構７、及び反射鏡支持台８からなる反射鏡支持構造全体の厚み（光軸方向の寸法）が増してしまう。
【００１５】
次に図２により反射鏡支持機構７の構成について説明する。図２において、１１は反射鏡１を取り付ける反射鏡取付部、１２は反射鏡支持機構７を反射鏡支持台８へ取付ける取付座部、１３は反射鏡取付部１１と取付座部１２とを連結する連結部材である。１４は反射鏡取付部１１と連結部材１３との連結個所に設けた弾性ピボット軸受であり、１５は連結部材１３と取付座部１２との連結個所に設けた弾性ピボット軸受である。ここで弾性ピボット軸受１４及び弾性ピボット軸受１５は、反射鏡１の円周接線方向の軸まわりに弾性的に回転変形するように配置されるものであり、このように軸まわりに弾性的に回転する部品であれば弾性ピボット軸受１４及び弾性ピボット軸受１５と同等に機能する。また、１６は連結部材１３に弾性ピボット軸受１５を取り付けるためのねじを差し込むスルーホールであり、１７は取付ねじである。弾性ピボット軸受１５は、連結部材１３に設けた穴に挿入して取り付けるが、この際に取付ねじ１７をスルーホール１６に差し込んで締め付けることにより、連結部材１３の穴径が小さくなり、弾性ピボット軸受１５の外周が締め付けられて固定する。このような取付ねじ１７による弾性ピボット軸受の固定方法は、図２及び後述の図４において弾性ピボット軸受を取付ける個所に同等に使用している。
【００１６】
図２に示す反射鏡支持機構の動作を図３によって説明する。図３に実線で示す反射鏡１は、熱変形により２点鎖線のように変形する。反射鏡１が固定部材に剛に固定されていると、その熱変形分の内部応力が発生し反射鏡１の鏡面精度に影響する変形が生じてしまう。本発明の支持機構は、この熱変形を弾性変形によって吸収し、鏡面精度の劣化を抑制するものである。即ち、図３の黒丸印に示す弾性ピボット軸受１４及び弾性ピボット軸受１５が弾性変形することによって、反射鏡支持機構内の反射鏡取付部１１が反射鏡１の半径方向に変位し、反射鏡１を支持する。この変形によって弾性ピボット軸受１４に発生する荷重は、剛体結合した場合に比べて非常に小さくなる。したがって、反射鏡１に及ぼす荷重が小さく、反射鏡１に内部応力をほとんど生じることないので、反射鏡１は、ほぼ相似形で熱変形し鏡面精度が良好に保たれる。
【００１７】
また反射鏡１の内部応力は、反射鏡１、反射鏡支持機構７、及び反射鏡支持台８を組み立てる際にも生じる。反射鏡１を反射鏡支持機構７に取り付けるときに、反射鏡半径方向に位置ずれが生じていると反射鏡支持機構７内の弾性ピボット軸受１４及び弾性ピボット軸受１５が必要以上に捩れて、取り付け後に構造の内部に初期応力を生じてしまう。これを防ぐためには、反射鏡１を反射鏡支持機構７に取り付けた後に、取付ねじ１７を弛めることにより弾性ピボット軸受の拘束を開放し、再びそのねじを締め付ければよい。これにより組立ての際に構造内部に生じた初期応力を開放することができる。
【００１８】
さらに反射鏡取付部１１は、図４のように構成してもよい。図４において、１８は反射鏡１を取り付ける当接部材、１９は当接部材１８に弾性ピボット軸受を介して連結される第１の保持部材、２０は保持部材１９に弾性ピボット軸受を介して連結される第２の保持部材である。２１は当接部材１８と保持部材１９との連結個所に設けた弾性ピボット軸受であり、２２は保持部材１９と保持部材２０との連結個所に設けた弾性ピボット軸受である。
【００１９】
弾性ピボット軸受２１は反射鏡１の半径方向の軸まわりに弾性的に回転変形するように配置されるものであり、このように軸まわりに弾性的に回転する部品であれば弾性ピボット軸受２１と同等に機能する。反射鏡１が半径方向軸まわりに回転変形するような場合、この弾性ピボット軸受２１によりその変形が吸収され、内部応力の発生を抑制することができる。例えば、反射鏡１を当接部材１８に取り付ける際に、取付ねじを使用して締め付けるような場合、取付ねじを回すこと自体によってトルクが発生する。この締付トルクに起因する変形により反射鏡１は、そのトルク相当のねじり荷重を内部に保持することとなるが、上記のように弾性ピボット軸受２１において変形が吸収されることによって内部応力を抑制することができる。
【００２０】
弾性ピボット軸受２２は反射鏡１の光軸方向の軸まわりに弾性的に回転変形するように配置されるものであり、このように軸まわりに弾性的に回転する部品であれば弾性ピボット軸受２２と同等に機能する。この弾性ピボット軸受２２によって、反射鏡１の光軸まわりの変形を吸収することができる。なお、図１に示されるように保持部材２２は、連結部材１３に弾性ピボット軸受１４を介して連結される。
【００２１】
実施の形態２．
この発明の実施の形態２に係る反射鏡支持機構を図５によって説明する。図５は実施の形態２に係る反射鏡支持機構の構成を示す構成図である。図５において、２３は反射鏡１を取付ける当接部材である。この当接部材２３に、図５に示すとおり、反射鏡１への当接面の概中央から外縁方向に向かって、反射鏡１の半径方向に深さを有するスリットを設ける。また、図５は特にこのスリットを爪形状に成形しているものである。なお、図５において図２と同一符号を付した構成部品は図２のそれと同一又は相当部分である。
【００２２】
反射鏡１の当接部材２３への取付面が熱膨張によって微小に変形しても、当接部材２３に設けたスリット部分が自在に弾性変形して熱変形を吸収するので、反射鏡１に過大な応力が発生するのを防ぐことができる。
【００２３】
実施の形態３．
この発明の実施の形態３に係る反射鏡支持機構を図６によって説明する。図６は実施の形態３に係る反射鏡支持機構の反射鏡取付部１１の断面図である。図６において、２４は当接部材２３の弾性ピボット軸受２１取付け部分に形成した外表面であり、２５は保持部材１９に形成した制止面、また２６は外表面２４と制止面２５との間に設けた緩衝材である。この緩衝材２６は図６に示すように制止面２５上に設けてもよいし、外表面２４上に設けてもよい。なお、図６において図４と同一符号を付した構成部品は図４のそれと同一又は相当部分である。
【００２４】
弾性ピボット軸受２１は、その機能上、１軸まわりに弾性変形するものであるが、並進方向に加わる荷重が過大となった場合に破壊する恐れがある。本発明に係る望遠鏡を宇宙空間で使用している状態においては、過大な並進方向荷重が反射鏡１に加わる可能性は低いが、宇宙空間に打ち上げる段階においては、ロケットからの大きな振動荷重が反射鏡１に加えられることになる。そこで本実施の形態においては、並進方向に振動荷重が加わった場合にも弾性ピボット軸受２１が破壊しないようにするため、過大な荷重を受けて破壊に至る変形が生じる前に外表面２４が制止面２５に当接する構造としている。
【００２５】
このように並進方向の荷重に対しては、外表面２４と制止面２５によって、弾性ピボット軸受２１の破壊を防ぐことができる。さらに緩衝材２６を設けることによって、外表面２４と制止面２５が過大な振動荷重によって当接する際に発生する衝撃を吸収することができる。
【００２６】
【発明の効果】
この発明の請求項１乃至請求項３に係る発明は、反射鏡の側面３点において設ける反射鏡支持機構を設け、それぞれ、反射鏡の円周接線方向の軸まわりに弾性回転する第１及び第２の弾性体軸受を有することにより、反射鏡と反射鏡支持構造とによる構造の厚み薄くすることができ、熱変形における反射鏡の鏡面精度を良好に保つことができる。また、反射鏡の半径方向の軸周りに弾性回転する第３の弾性体軸受を具備することにより、反射鏡の半径方向軸まわりの変形に対して、反射鏡に生じる内部応力の発生を抑制することができる。また、反射鏡の光軸方向の軸周りに弾性回転する第４の弾性体軸受を具備することにより、反射鏡の光軸方向軸まわりの変形に対して、反射鏡に生じる内部応力の発生を抑制することができる。
【００２７】
この発明の請求項４に係る発明は、反射鏡の円周接線方向の軸まわりに弾性回転する第１及び第２の弾性体軸受を有することにより、熱変形における反射鏡の鏡面精度を良好に保つことができ、反射鏡の光軸方向の軸周りに弾性回転する第４の弾性体軸受を具備することにより、反射鏡の光軸方向軸まわりの変形に対して、反射鏡に生じる内部応力の発生を抑制することができる。
【図面の簡単な説明】
【図１】この発明の実施の形態１に係る反射鏡支持機構を含む反射鏡支持構造を示す構成図である。
【図２】この発明の実施の形態１に係る反射鏡支持機構の構成を示す構成図である。
【図３】この発明の実施の形態１に係る反射鏡支持機構を含む反射鏡支持構造の支持原理を示す模式図である。
【図４】この発明の実施の形態１に係る反射鏡支持機構の断面図である。
【図５】この発明の実施の形態２に係る反射鏡支持機構の構成を示す構成図である。
【図６】この発明の実施の形態３に係る反射鏡支持機構の断面図である。
【図７】従来の反射鏡支持機構を示す断面図である。
【符号の説明】
７反射鏡支持機構
１１反射鏡取付部
１２反射鏡支持台
１３連結部材
１４、１５弾性ピボット軸受
１７取付ねじ
１８、２３当接部材
２１、２２弾性ピボット軸受
２４外表面
２５制止面[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a reflecting mirror support mechanism that can support a reflecting mirror of an optical reflecting telescope that is used by placing it in outer space while suppressing a decrease in mirror surface accuracy.
[0002]
[Prior art]
FIG. 7 is a sectional view showing a conventional reflecting mirror support mechanism. In FIG. 7, 1 is a reflector, 2 is a reflector-side mounting base for mounting the reflector on the reflector support mechanism, 3 is a support mechanism-side mounting base, 4 is a reflector-side mounting base 2 and the support mechanism side. It is a U-shaped fixing member that sandwiches and fixes the mounting base 3. Reference numeral 5 denotes a rolling bearing for adjusting the inclination of the seat surface of the mounting base. Reference numeral 6 denotes an elastic body which absorbs a load generated by deformation of the reflector, and is provided between the fixed side of the reflector support mechanism and the reflector side. The elastic body 6 shown in FIG. 7 is of a leaf spring type.
[0003]
When the reflecting mirror is attached to the reflecting mirror support mechanism, if the respective contact surfaces of the reflecting mirror side mounting base 2 and the support mechanism side mounting base 3 are inclined with respect to each other, when these are fixed by the U-shaped fixing member 4, The main reflector is deformed. In order to prevent this, a rolling bearing 5 is provided in the reflecting mirror support mechanism, and the mounting mechanism 3 is rotated by the rolling bearing 5 to set the contact surface thereof to an arbitrary inclination. Can be. Further, even after the reflector 1 is attached to the reflector support mechanism, when the reflector 1 itself undergoes thermal deformation, or when the reflector 1 is tilted to change the telescope viewing direction, its own weight is exerted by the action of gravity. It may be deformed. Due to these deformations, a relative rotation angle occurs in the relative relationship between the reflecting mirror 1 and the reflecting mirror support mechanism, and a translation direction shift occurs. The relative rotation angle is absorbed by the rolling bearing 5 rotating the support mechanism side mounting base 3. The translational deviation is also absorbed by the elastic body 6 within the allowable deformation, and the mirror surface accuracy of the reflecting mirror 1 is maintained.
[0004]
[Problems to be solved by the invention]
The conventional mirror support mechanism incorporates the rolling bearing 5 as described above. When this optical reflection type telescope is used in space, the reflector support mechanism is exposed to a vacuum. In a vacuum state, the lubricating oil inside the rolling bearing 5 of the reflecting mirror support mechanism evaporates and seizure occurs, and the movable part may not move. However, there is a problem that the performance as a telescope cannot be maintained.
[0005]
The present invention has been made in order to solve the above-described problems, and in a space where it is difficult to use a rolling bearing, a reflector capable of suppressing a decrease in mirror surface accuracy due to thermal deformation of the reflector. The aim is to obtain a support mechanism.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a reflector support structure , and a reflector support mechanism fixed to the reflector support and provided on three side surfaces of the reflector of the telescope to support the reflector. A reflecting mirror supporting structure, wherein the reflecting mirror supporting mechanism respectively connects a reflecting mirror mounting portion to be mounted on a reflecting mirror on a side surface of a reflecting mirror of a telescope, and the reflecting mirror mounting portion and the reflecting mirror support base. And a resilient bearing that resiliently rotates about one axis, wherein the resilient bearing is provided at a connecting point between the reflector mounting portion and the connecting member, and the reflector mounting portion reflects the reflection with respect to the connecting member. A first elastic bearing that rotates about an axis in a circumferential tangential direction of the mirror; and an elastic bearing that elastically rotates about one axis, the first elastic bearing being provided at a connecting portion between the connecting member and the reflector support. , Connecting the connecting member to the reflecting mirror support It is obtained and a second elastic bearing which rotates in the circumferential tangential direction of the axis around said reflector.
[0007]
According to a second aspect of the present invention, in the reflector supporting structure according to the first aspect of the present invention, the reflector attaching portion includes a contact member attached to the reflector, and And a third elastic bearing that rotates about a radial axis of the mirror .
[0008]
Reflector support structure according to the invention of claim 3 is the reflector support structure according to the invention of claim 1, said reflector mounting portion, the contact member mounting the reflector, the reflecting this contact member And a fourth elastic bearing which rotates around an axis in the optical axis direction of the mirror.
[0009]
A reflector support mechanism according to a fourth aspect of the present invention includes a reflector mounting portion attached to the reflector on a side surface of the reflector of the telescope, a connecting member connecting the reflector mounting portion and the reflector support, and a one-axis. An elastic bearing that elastically rotates around, and is provided at a connection point between the reflector mounting portion and the connecting member, and the reflecting mirror mounting portion is disposed in a circumferential tangential direction of the reflecting mirror with respect to the connecting member. A first elastic bearing that rotates about an axis; and an elastic bearing that elastically rotates about one axis, wherein the first elastic bearing is provided at a connection point between the connection member and the reflector support, and the connection member is connected to the reflection member. A second elastic bearing that rotates about an axis in a circumferential tangential direction of the reflecting mirror with respect to the mirror supporting base; the reflecting mirror mounting portion includes a contact member for mounting the reflecting mirror; The member is rotated around the optical axis of the reflecting mirror. It is obtained; and a fourth elastic bearing of.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
The reflecting mirror support mechanism according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram showing a reflector support structure including the reflector support mechanism according to the first embodiment. FIG. 2 is a configuration diagram showing the configuration of the reflector support mechanism according to the first embodiment, and FIG. 3 is a schematic diagram showing the support principle of a reflector support structure including the reflector support mechanism according to the first embodiment. FIG. 4 is a sectional view of the reflector support mechanism according to the first embodiment. In FIG. 1, reference numeral 7 denotes a reflector support mechanism, and reference numeral 8 denotes a reflector support base on which the reflector 1 and the reflector support mechanism 7 are mounted. In the reflecting mirror 1, 9 is a reflecting mirror surface, and 10 is a back structure that supports the reflecting mirror surface.
[0014]
As shown in FIG. 1, the reflecting mirror support mechanism 7 is provided at three locations on the side surface of the reflecting mirror 1 and is attached to the reflecting mirror support 8. The reflecting mirror 1 includes a thin reflecting mirror surface 9 and a back structure 10 provided on the back surface of the reflecting mirror surface 9 and supporting the reflecting mirror surface 9. The back structure 10 has a certain degree of structural rigidity. The thickness of is secured. By providing the reflector support mechanism 7 on the side surface of the back structure 10 (that is, the surface of the circumference of the reflector 1 perpendicular to the radial direction of the reflector), a compact configuration is obtained. This reflecting mirror support mechanism 7 can be provided on the back surface of the reflecting mirror 1 in the same manner as the conventional reflecting mirror supporting mechanism shown in FIG. 7, but the reflecting mirror 1, the reflecting mirror supporting mechanism 7, and the reflecting mirror supporting table 8 The thickness (dimension in the optical axis direction) of the entire reflecting mirror support structure becomes large.
[0015]
Next, the configuration of the reflector support mechanism 7 will be described with reference to FIG. In FIG. 2, reference numeral 11 denotes a reflecting mirror mounting portion for mounting the reflecting mirror 1, 12 denotes a mounting seat for mounting the reflecting mirror support mechanism 7 to the reflecting mirror support 8, and 13 connects the reflecting mirror mounting portion 11 to the mounting seat 12. It is a connecting member. Reference numeral 14 denotes an elastic pivot bearing provided at a connecting point between the reflector mounting portion 11 and the connecting member 13, and reference numeral 15 denotes an elastic pivot bearing provided at a connecting point between the connecting member 13 and the mounting seat 12. Here, the elastic pivot bearing 14 and the elastic pivot bearing 15 are arranged so as to elastically rotate and deform around an axis in a circumferential tangential direction of the reflecting mirror 1, and thus elastically rotate around the axis. If it is a component that does, it functions equivalently to the elastic pivot bearing 14 and the elastic pivot bearing 15. Reference numeral 16 denotes a through hole into which a screw for attaching the elastic pivot bearing 15 to the connecting member 13 is inserted, and reference numeral 17 denotes a mounting screw. The elastic pivot bearing 15 is inserted into a hole provided in the connecting member 13 and attached. At this time, the hole diameter of the connecting member 13 is reduced by inserting the mounting screw 17 into the through hole 16 and tightening. The outer periphery of 15 is tightened and fixed. The fixing method of the elastic pivot bearing by the mounting screw 17 is used equally in the place where the elastic pivot bearing is attached in FIG. 2 and FIG. 4 described later.
[0016]
The operation of the reflector support mechanism shown in FIG. 2 will be described with reference to FIG. The reflecting mirror 1 shown by a solid line in FIG. 3 is deformed as shown by a two-dot chain line due to thermal deformation. If the reflecting mirror 1 is rigidly fixed to the fixing member, internal stress corresponding to the thermal deformation is generated, and deformation affecting the mirror surface accuracy of the reflecting mirror 1 occurs. The support mechanism of the present invention absorbs this thermal deformation by elastic deformation and suppresses deterioration of mirror surface accuracy. That is, when the elastic pivot bearing 14 and the elastic pivot bearing 15 shown by the black circles in FIG. 3 are elastically deformed, the reflecting mirror mounting portion 11 in the reflecting mirror support mechanism is displaced in the radial direction of the reflecting mirror 1, and Support. The load generated on the elastic pivot bearing 14 due to this deformation is very small as compared with the case where the elastic pivot bearing 14 is rigidly connected. Therefore, the load applied to the reflecting mirror 1 is small, and almost no internal stress is generated in the reflecting mirror 1, so that the reflecting mirror 1 is thermally deformed in a substantially similar shape, and the mirror surface accuracy is kept good.
[0017]
The internal stress of the reflector 1 also occurs when the reflector 1, the reflector support mechanism 7, and the reflector support 8 are assembled. When the reflecting mirror 1 is mounted on the reflecting mirror support mechanism 7, if the positional deviation occurs in the reflecting mirror radial direction, the elastic pivot bearing 14 and the elastic pivot bearing 15 in the reflecting mirror supporting mechanism 7 are twisted more than necessary, and the mounting is performed. Later, an initial stress is generated inside the structure. In order to prevent this, after attaching the reflecting mirror 1 to the reflecting mirror support mechanism 7, the restraint of the elastic pivot bearing may be released by loosening the mounting screw 17, and the screw may be tightened again. Thereby, the initial stress generated inside the structure during the assembly can be released.
[0018]
Further, the reflector mounting portion 11 may be configured as shown in FIG. In FIG. 4, reference numeral 18 denotes a contact member for attaching the reflecting mirror 1, 19 denotes a first holding member connected to the contact member 18 via an elastic pivot bearing, and 20 denotes a first holding member connected to the holding member 19 via an elastic pivot bearing. This is the second holding member to be used. Reference numeral 21 denotes an elastic pivot bearing provided at a connection point between the contact member 18 and the holding member 19, and reference numeral 22 denotes an elastic pivot bearing provided at a connection point between the holding member 19 and the holding member 20.
[0019]
The elastic pivot bearing 21 is arranged so as to be elastically rotated and deformed around the axis in the radial direction of the reflecting mirror 1. Works equally well. In the case where the reflecting mirror 1 is deformed by rotation about the radial axis, the deformation is absorbed by the elastic pivot bearing 21 and the generation of internal stress can be suppressed. For example, when the reflecting mirror 1 is attached to the abutting member 18 and tightened by using an attachment screw, torque is generated by turning the attachment screw itself. Due to the deformation caused by the tightening torque, the reflecting mirror 1 holds a torsional load corresponding to the torque inside, but the internal stress is suppressed by the deformation being absorbed in the elastic pivot bearing 21 as described above. can do.
[0020]
The elastic pivot bearing 22 is arranged so as to be elastically rotated and deformed around the axis of the reflecting mirror 1 in the optical axis direction. Works the same as. The elastic pivot bearing 22 can absorb the deformation of the reflecting mirror 1 around the optical axis. In addition, as shown in FIG. 1, the holding member 22 is connected to the connecting member 13 via the elastic pivot bearing 14.
[0021]
Embodiment 2 FIG.
Embodiment 2 A reflecting mirror support mechanism according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 5 is a configuration diagram showing the configuration of the reflector support mechanism according to the second embodiment. In FIG. 5, reference numeral 23 denotes a contact member for mounting the reflecting mirror 1. As shown in FIG. 5, the contact member 23 is provided with a slit having a depth in the radial direction of the reflector 1 from the approximate center of the contact surface to the reflector 1 toward the outer edge. FIG. 5 particularly shows this slit formed in a claw shape. In FIG. 5, the components denoted by the same reference numerals as those in FIG. 2 are the same as or corresponding to those in FIG.
[0022]
Even if the attachment surface of the reflecting mirror 1 to the contact member 23 is slightly deformed due to thermal expansion, the slit portion provided in the contact member 23 is freely elastically deformed to absorb the thermal deformation. The generation of excessive stress can be prevented.
[0023]
Embodiment 3 FIG.
Third Embodiment A reflecting mirror support mechanism according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a sectional view of the reflector mounting portion 11 of the reflector support mechanism according to the third embodiment. In FIG. 6, reference numeral 24 denotes an outer surface formed on the elastic pivot bearing 21 mounting portion of the contact member 23, reference numeral 25 denotes a stop surface formed on the holding member 19, and reference numeral 26 denotes a position between the outer surface 24 and the stop surface 25. It is a cushioning material provided. This cushioning material 26 may be provided on the restraining surface 25 as shown in FIG. 6 or may be provided on the outer surface 24. In FIG. 6, the components denoted by the same reference numerals as those in FIG. 4 are the same as or corresponding to those in FIG.
[0024]
The elastic pivot bearing 21 elastically deforms around one axis due to its function, but may be broken when a load applied in the translation direction becomes excessive. In a state where the telescope according to the present invention is used in outer space, the possibility that an excessive translational load is applied to the reflector 1 is low, but at the stage of launching into outer space, a large vibration load from the rocket is reflected. Will be added to the mirror 1. Therefore, in the present embodiment, in order to prevent the elastic pivot bearing 21 from breaking even when a vibration load is applied in the translation direction, the outer surface 24 is restrained before an excessive load causes a deformation leading to a break. The structure is in contact with the surface 25.
[0025]
As described above, the elastic pivot bearing 21 can be prevented from being broken by the outer surface 24 and the restraint surface 25 against the load in the translation direction. Further, by providing the cushioning material 26, it is possible to absorb an impact generated when the outer surface 24 and the stopping surface 25 come into contact with each other due to an excessive vibration load.
[0026]
【The invention's effect】
The invention according to claims 1 to 3 of the present invention is provided with a reflecting mirror supporting mechanism provided at three points on the side surface of the reflecting mirror, and the first and second mirrors elastically rotate around the circumferential tangential axis of the reflecting mirror, respectively. By having the two elastic bearings, the thickness of the structure including the reflector and the reflector support structure can be reduced, and the mirror surface accuracy of the reflector during thermal deformation can be kept good. Further, by providing the third elastic body bearing that elastically rotates around the radial axis of the reflecting mirror, the generation of internal stress generated in the reflecting mirror against deformation around the radial axis of the reflecting mirror is suppressed. be able to. In addition, by providing the fourth elastic body bearing that elastically rotates around the optical axis direction of the reflecting mirror, generation of internal stress generated in the reflecting mirror against deformation around the optical axis direction of the reflecting mirror is reduced. Can be suppressed.
[0027]
The invention according to claim 4 of the present invention has the first and second elastic bearings elastically rotating around the axis of the reflecting mirror in the circumferential tangential direction, thereby improving the mirror surface accuracy of the reflecting mirror in thermal deformation. By providing a fourth elastic body bearing which can be maintained and elastically rotates around the axis of the reflecting mirror in the optical axis direction, the internal stress generated in the reflecting mirror against the deformation of the reflecting mirror around the optical axis direction Can be suppressed.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a reflector support structure including a reflector support mechanism according to Embodiment 1 of the present invention;
FIG. 2 is a configuration diagram showing a configuration of a reflector support mechanism according to the first embodiment of the present invention;
FIG. 3 is a schematic view showing a support principle of a reflector support structure including the reflector support mechanism according to the first embodiment of the present invention.
FIG. 4 is a sectional view of the reflector support mechanism according to the first embodiment of the present invention;
FIG. 5 is a configuration diagram showing a configuration of a reflector support mechanism according to Embodiment 2 of the present invention;
FIG. 6 is a sectional view of a reflecting mirror support mechanism according to Embodiment 3 of the present invention.
FIG. 7 is a sectional view showing a conventional reflecting mirror support mechanism.
[Explanation of symbols]
7 Reflecting mirror support mechanism 11 Reflecting mirror mounting part 12 Reflecting mirror support 13 Connecting member 14, 15 Elastic pivot bearing 17 Mounting screw 18, 23 Contact member 21, 22 Elastic pivot bearing 24 Outer surface 25 Stopping surface

Claims

A reflector support structure comprising a reflector support and a reflector support mechanism fixed to the reflector support and provided at three points on the side of the reflector of the telescope to support the reflector. The mirror support mechanism includes a reflector mounting portion that is attached to the reflector on the side of the reflector of the telescope, a connecting member that connects the reflector mounting portion and the reflector support, and an elastic member that elastically rotates about one axis. A body bearing, which is provided at a connection point between the reflector mounting portion and the connecting member, and rotates the reflector mounting portion around an axis in a circumferential tangential direction of the reflecting mirror with respect to the connecting member. An elastic bearing and an elastic bearing that elastically rotate around one axis, wherein the elastic member is provided at a connecting portion between the connecting member and the reflecting mirror support, and the connecting member is attached to the reflecting mirror support. Around the circumference tangential axis of the reflector Reflector support structure characterized by comprising a second elastic bearing for rolling.

The said reflector attaching part was provided with the contact member attached to the said reflector, and the 3rd elastic bearing which rotates this contact member about the radial axis of the said reflector. Item 2. The reflector supporting structure according to Item 1.

The reflector mounting portion includes a contact member for attaching the reflector, and a fourth elastic bearing that rotates the contact member about the optical axis of the reflector. The reflector supporting structure according to claim 1.

A reflector mounting portion attached to the reflector on a side surface of the reflector of the telescope; a connecting member connecting the reflector mounting portion and the reflector support; and an elastic bearing elastically rotating around one axis, A first elastic bearing that is provided at a connection point between the reflector mounting portion and the connecting member, and rotates the reflector mounting portion about an axis in a circumferential tangential direction of the reflecting mirror with respect to the connecting member; An elastic bearing elastically rotating around one axis, the elastic bearing being provided at a connecting portion between the connecting member and the reflecting mirror support, and connecting the connecting member to a circumferential tangent of the reflecting mirror to the reflecting mirror support. A second elastic bearing that rotates about an axis in a direction, the reflecting mirror mounting portion includes a contact member for mounting the reflecting mirror, and the contact member is disposed around an axis in the optical axis direction of the reflecting mirror. And a rotating fourth elastic bearing. Reflecting mirror support mechanism to be.