JP2002214537A - Optical device - Google Patents
Optical deviceInfo
- Publication number
- JP2002214537A JP2002214537A JP2001012145A JP2001012145A JP2002214537A JP 2002214537 A JP2002214537 A JP 2002214537A JP 2001012145 A JP2001012145 A JP 2001012145A JP 2001012145 A JP2001012145 A JP 2001012145A JP 2002214537 A JP2002214537 A JP 2002214537A
- Authority
- JP
- Japan
- Prior art keywords
- intermediate base
- base
- mirror
- mounting base
- primary 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
Landscapes
- Mounting And Adjusting Of Optical Elements (AREA)
- Telescopes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、反射望遠鏡などの
光学装置に関し、詳しくは鏡筒の構造に特徴のある光学
装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device such as a reflection telescope, and more particularly to an optical device having a characteristic lens barrel structure.
【０００２】[0002]
【従来の技術】図４〜図５は、従来のグレゴリアン反射
望遠鏡の鏡筒部を説明するものであって、図４はその斜
視図であり、図５は図４におけるV − V線に沿った概略
断面図である。図４〜図５において、１は主鏡、１１は
主鏡取付ベース、１２は主鏡１の中心に設けられた中心
孔、２は副鏡、２１は副鏡取付ベース、２２は副鏡２の
曲率中心、２３は主鏡１と副鏡２の合成焦点、３は上記
望遠鏡の光軸、４は鏡筒である。鏡筒４は、副鏡取付ベ
ース２１の外側に設けられたリング体４０１、リング体
４０１と主鏡取付ベース１１とを結合する複数のトラス
４０２、およびリング体４０１と副鏡取付ベース２１と
を結合するスパイダ４０３とから構成されている。主鏡
１と副鏡２とは、両者の中心が光軸３と一致し、且つ副
鏡２の曲率中心２２および焦点２３が光軸３上に来るよ
うに鏡筒４に支持固定されている。2. Description of the Related Art FIGS. 4 and 5 illustrate a lens barrel of a conventional Gregorian reflection telescope. FIG. 4 is a perspective view of the same, and FIG. 5 is a view taken along a line V--V in FIG. FIG. 4 and 5, 1 is a primary mirror, 11 is a primary mirror mounting base, 12 is a center hole provided at the center of the primary mirror 1, 2 is a secondary mirror, 21 is a secondary mirror mounting base, and 22 is a secondary mirror 2 Is a composite focus of the primary mirror 1 and the secondary mirror 2, 3 is the optical axis of the telescope, and 4 is a lens barrel. The lens barrel 4 includes a ring body 401 provided outside the sub mirror mounting base 21, a plurality of trusses 402 connecting the ring body 401 and the main mirror mounting base 11, and a ring body 401 and the sub mirror mounting base 21. And a spider 403 to be combined. The primary mirror 1 and the secondary mirror 2 are supported and fixed to the lens barrel 4 such that the centers of the two coincide with the optical axis 3 and the center of curvature 22 and the focal point 23 of the secondary mirror 2 are on the optical axis 3. .
【０００３】従来のグレゴリアン反射望遠鏡は、上記の
構造を有しており、天体観測時における天体からの光は
主鏡１および副鏡２により反射し、上記した通り、光軸
３上に焦点２３を結ぶ。ところで上記望遠鏡の姿勢変化
や温度変化などにより鏡筒４に変形が生じると、主鏡１
と副鏡２との間に相対変位が生じ、観測に有害な光学性
能の劣化が発生する問題がある。特に上記の構造では、
リング体４０１は副鏡取付ベース２１と同じ高さに設け
られ、且つ主鏡取付ベース１１と同じ外周サイズを有す
るために、リング体４０１とトラス４０２が上記望遠鏡
の姿勢変化時に鏡筒４の自重や温度分布による不均一な
熱膨張により変形し、即ち鏡筒４自体が変形し、この結
果、副鏡２が光軸３に対して偏心したりあるいは傾き、
かかる副鏡２の光軸３からのずれによる像の広がりや指
向方向ずれなどの光学性能が劣化する問題があった。The conventional Gregorian reflection telescope has the above-mentioned structure. Light from an astronomical object at the time of astronomical observation is reflected by the primary mirror 1 and the secondary mirror 2, and as described above, the focal point 23 is located on the optical axis 3. Tie. By the way, if the lens barrel 4 is deformed due to a change in the attitude or temperature of the telescope, the primary mirror 1
There is a problem that relative displacement occurs between the mirror and the sub-mirror 2 and deterioration of optical performance harmful to observation occurs. Especially in the above structure,
Since the ring body 401 is provided at the same height as the sub-mirror mounting base 21 and has the same outer peripheral size as the primary mirror mounting base 11, the ring body 401 and the truss 402 are weighed by the weight of the lens barrel 4 when the attitude of the telescope changes. Deformation due to uneven thermal expansion due to heat and temperature distribution, that is, the lens barrel 4 itself deforms, and as a result, the sub-mirror 2 is eccentric or tilted with respect to the optical axis 3,
There has been a problem that optical performance deteriorates, such as the spread of an image due to the displacement of the sub-mirror 2 from the optical axis 3 and the displacement of the directional direction.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、従来技術に
おける上記の問題を解決するためになされたものであっ
て、望遠鏡などの光学装置の姿勢変化時の鏡筒の自重や
温度分布による不均一な熱膨張があっても、鏡筒の変形
が少なくて光学性能の劣化が少ない光学装置を提供する
ことを課題とする。SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems in the prior art, and it is an object of the present invention to provide an optical device, such as a telescope, having an undesired weight due to its own weight and temperature distribution when the attitude of the optical device changes. An object of the present invention is to provide an optical device in which even if there is uniform thermal expansion, deformation of a lens barrel is small and optical performance is less deteriorated.
【０００５】[0005]
【課題を解決するための手段】本発明の光学装置は、
（１）主鏡、上記主鏡を取り付ける主鏡取付ベース、上
記主鏡に対向配置されると共に上記主鏡からの光を反射
集光する副鏡、上記副鏡を取り付ける副鏡取付ベース、
上記主鏡取付ベースと上記副鏡取付ベースの間に設置さ
れると共に上記主鏡取付ベースと上記副鏡取付ベースと
に結合部材により結合された環状の中間ベースを有する
鏡筒を備えたものである。 （２）上記（１）において、中間ベースは、主鏡取付ベ
ースとほぼ平行に且つ副鏡の曲率中心と略同じ中間位置
に設置されたものである。 （３）上記（１）または（２）において、中間ベース
は、副鏡取付ベースの外周サイズとほぼ等しい外周サイ
ズを有する第一中間ベース、および主鏡取付ベースの外
周サイズとほぼ等しい外周サイズを有する第二中間ベー
スとから構成されており、上記第一中間ベースは上記副
鏡取付ベースと結合され、上記第二中間ベースは上記主
鏡取付ベースと結合され、且つ上記第一中間ベースと上
記第二中間ベースとは光源から主鏡への入光を許容する
結合部材により結合されものである。 （４）上記（３）において、第一中間ベースと副鏡取付
ベースとは筒体により結合され、第二中間ベースと主鏡
取付ベースとは筒体により結合されたものである。 （５）上記（１）または（２）において、副鏡取付ベー
スと中間ベースは、互いにほぼ等しい外周サイズを有
し、上記中間ベースと主鏡取付ベースとは、光源から主
鏡への入光を許容する結合部材により結合されたもので
ある。 （６）上記（１）〜（５）のいずれか一項において、光
学装置は反射望遠鏡である。The optical device according to the present invention comprises:
(1) a primary mirror, a primary mirror mounting base for mounting the primary mirror, a secondary mirror disposed to face the primary mirror and reflecting and condensing light from the primary mirror, a secondary mirror mounting base for mounting the secondary mirror,
A lens barrel that is provided between the primary mirror mounting base and the secondary mirror mounting base and has an annular intermediate base coupled to the primary mirror mounting base and the secondary mirror mounting base by a coupling member; is there. (2) In the above (1), the intermediate base is installed substantially in parallel with the main mirror mounting base and at substantially the same intermediate position as the center of curvature of the sub mirror. (3) In the above (1) or (2), the intermediate base has a first intermediate base having an outer peripheral size substantially equal to the outer peripheral size of the sub mirror mounting base, and an outer peripheral size substantially equal to the outer peripheral size of the main mirror mounting base. A second intermediate base having the first intermediate base coupled to the secondary mirror mounting base, the second intermediate base coupled to the primary mirror mounting base, and the first intermediate base and The second intermediate base is connected by a connecting member that allows light from the light source to enter the primary mirror. (4) In the above (3), the first intermediate base and the sub-mirror mounting base are connected by a cylinder, and the second intermediate base and the primary mirror mounting base are connected by a cylinder. (5) In the above (1) or (2), the sub-mirror mounting base and the intermediate base have substantially the same outer peripheral size, and the intermediate base and the main mirror mounting base receive light from the light source to the main mirror. Are connected by a connecting member that allows (6) In any one of the above items (1) to (5), the optical device is a reflection telescope.
【０００６】[0006]
【発明の実施の形態】以下において、実施の形態１など
に後続する実施の形態については、先行する実施の形態
に示された部位と同じ部位については同符号を付し、各
内容の説明は先行する実施の形態での説明を参照するこ
ととして省略することがある。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, in the embodiments following the first embodiment and the like, the same parts as those shown in the preceding embodiment are denoted by the same reference numerals, and the description of each content will be omitted. It may be omitted as referring to the description in the preceding embodiment.
【０００７】実施の形態１．図１は、本発明における光
学装置の一例たるグレゴリアン反射望遠鏡の実施の形態
１を説明するものであって、上記望遠鏡の鏡筒部の概略
断面図である。図１において、１は主鏡、１１は主鏡取
付ベース、１２は主鏡１の中心に設けられた中心孔、２
は副鏡、２１は副鏡取付ベース、２２は副鏡２の曲率中
心、２３は主鏡１と副鏡２の合成焦点、３は光軸、４は
鏡筒である。鏡筒４は、リング状の中間ベース４１０、
複数のトラス４２０、複数のトラス４３０、およびスパ
イダ４４０から構成されており、また中間ベース４１０
は、いずれも主鏡取付ベース１１とほぼ平行に且つ副鏡
２の曲率中心２２とほぼ同じ高さの位置に設置された第
一中間ベース４１１と第二中間ベース４１２とから構成
されている。Embodiment 1 FIG. 1 is a schematic cross-sectional view illustrating a first embodiment of a Gregorian reflection telescope, which is an example of an optical device according to the present invention, and is a barrel section of the telescope. In FIG. 1, 1 is a primary mirror, 11 is a primary mirror mounting base, 12 is a center hole provided at the center of the primary mirror 1, 2
Is a sub mirror, 21 is a sub mirror mounting base, 22 is a center of curvature of the sub mirror 2, 23 is a combined focal point of the main mirror 1 and the sub mirror 2, 3 is an optical axis, and 4 is a lens barrel. The lens barrel 4 includes a ring-shaped intermediate base 410,
It is composed of a plurality of trusses 420, a plurality of trusses 430, and a spider 440, and includes an intermediate base 410.
Are each composed of a first intermediate base 411 and a second intermediate base 412 installed substantially parallel to the main mirror mounting base 11 and at the same height as the center of curvature 22 of the secondary mirror 2.
【０００８】第一中間ベース４１１は、副鏡取付ベース
２１の外周サイズとほぼ等しい外周サイズを有し、第二
中間ベース４１２は、主鏡取付ベース１１の外周サイズ
とほぼ等しい外周サイズを有している。さらに、第一中
間ベース４１１と副鏡取付ベース２１とは光軸３と平行
に延在する複数のトラス４２０により、第二中間ベース
４１２と主鏡取付ベース１１とは光軸３と平行に延在す
る複数のトラス４３０により、また第一中間ベース４１
１と第二中間ベース４１２とは光軸３に向かって放射状
に延在する複数の接続部材からなるスパイダ４４０によ
り、それぞれ結合されて鏡筒４が構成されている。第一
中間ベース４１１と第二中間ベース４１２とを結合する
スパイダ４４０は、放射状に延在する複数の部材により
構成されているので、天体からの光は、上記複数の部材
の間の隙間を通過して主鏡への入光が可能となる。The first intermediate base 411 has an outer peripheral size substantially equal to the outer peripheral size of the sub mirror mounting base 21, and the second intermediate base 412 has an outer peripheral size substantially equal to the outer peripheral size of the main mirror mounting base 11. ing. Further, the first intermediate base 411 and the secondary mirror mounting base 21 are extended in parallel with the optical axis 3 by a plurality of trusses 420 extending in parallel with the optical axis 3. The plurality of existing trusses 430 and the first intermediate base 41
The first and second intermediate bases 412 are connected to each other by a spider 440 including a plurality of connection members extending radially toward the optical axis 3 to form the lens barrel 4. Since the spider 440 connecting the first intermediate base 411 and the second intermediate base 412 is composed of a plurality of members extending radially, light from the celestial body passes through a gap between the plurality of members. Then, light can enter the primary mirror.
【０００９】鏡筒４において、副鏡取付ベース２１およ
び主鏡取付ベース１１は、それぞれトラス４２０および
トラス４３０を介して第一中間ベース４１１および第二
中間ベース４１２に結合されているので、第一中間ベー
ス４１１および第二中間ベース４１２に望遠鏡の姿勢変
化時の鏡筒４の自重や温度分布による不均一な熱膨張に
よる変形があっても、第二中間ベース４１２に対する主
鏡１の相対変位は、副鏡２の曲率中心２２まわりの回転
移動成分の割合が大半となり、一方、第一中間ベース４
１１に対する副鏡２の相対変位も、曲率中心２２まわり
の回転移動成分の割合が大半となる。したがって鏡筒４
における主鏡１と副鏡２の各相対変位は、曲率中心２２
のまわりの変位成分となる特徴を有することになる。In the lens barrel 4, the sub-mirror mounting base 21 and the main mirror mounting base 11 are connected to the first intermediate base 411 and the second intermediate base 412 via the trusses 420 and 430, respectively. Even if the intermediate base 411 and the second intermediate base 412 are deformed due to non-uniform thermal expansion due to the weight of the lens barrel 4 and a temperature distribution when the attitude of the telescope changes, the relative displacement of the primary mirror 1 with respect to the second intermediate base 412 is not affected. , The ratio of the rotational movement component around the center of curvature 22 of the secondary mirror 2 becomes the majority, while the first intermediate base 4
The relative displacement of the sub-mirror 2 with respect to 11 also has a large proportion of the rotational movement component about the center of curvature 22. Therefore, lens barrel 4
Relative displacement of the primary mirror 1 and the secondary mirror 2 at the center of curvature 22
Has a feature that becomes a displacement component around.
【００１０】一方、前記した通り光軸３に対して副鏡２
に偏心や傾きなどの相対変位が生じると、像の広がりや
指向方向のずれが発生し光学性能が劣化する。しかるに
副鏡２の鏡面は、球面または球面に近い曲面をなしてお
り、副鏡２の曲率中心２２のまわりに副鏡２が相対変位
した場合、上記鏡面の法線の変化は小さく、よって反射
する光の進行方向のずれも小さいことから、光学性能の
劣化が少ないことが知られている。したがって、トラス
４２０、４３０に望遠鏡の姿勢変化時に前記した変形が
生じても、鏡筒４は光学性能の劣化が少ない鏡筒構造を
有することになる。On the other hand, as described above, the secondary mirror 2 is
When a relative displacement such as eccentricity or inclination occurs, the image spreads and the directional direction shifts, and the optical performance deteriorates. However, the mirror surface of the secondary mirror 2 has a spherical surface or a curved surface close to a spherical surface. When the secondary mirror 2 is relatively displaced around the center of curvature 22 of the secondary mirror 2, the change in the normal line of the mirror surface is small, and hence the reflection is small. It is known that the deterioration of the optical performance is small because the deviation of the light traveling direction is small. Therefore, even if the trusses 420 and 430 are deformed when the telescope is changed in attitude, the lens barrel 4 has a lens barrel structure with little deterioration in optical performance.
【００１１】実施の形態２．図２は、本発明における光
学装置の一例たるグレゴリアン反射望遠鏡の実施の形態
２を説明するものであって、上記望遠鏡の鏡筒部の概略
断面図である。図２において４１０は、副鏡取付ベース
２１の外周サイズとほぼ等しい外周サイズを有するリン
グ状の中間ベースであり、４５０は複数のトラスであ
る。中間ベース４１０は、主鏡取付ベース１１とほぼ平
行に、且つ副鏡２の曲率中心２２とほぼ同じ高さの位置
に設置されており、且つ中間ベース４１０と副鏡取付ベ
ース２１とは光軸３と平行に延在する複数のトラス４２
０により、また中間ベース４１０と主鏡取付ベース１１
とは光軸３に対して傾斜して延在する複数のトラス４５
０により、それぞれ結合されて鏡筒４が構成されてい
る。複数のトラス４５０のそれぞれは、上記した通りい
ずれも光軸３に対して傾斜して延在しているので、天体
からの光は、隣接するトラス４５０の間の隙間を通過し
て主鏡への入光が可能となる。Embodiment 2 FIG. 2 illustrates a Gregorian reflection telescope according to a second embodiment of the present invention, which is an example of an optical device, and is a schematic cross-sectional view of a lens barrel of the telescope. In FIG. 2, reference numeral 410 denotes a ring-shaped intermediate base having an outer peripheral size substantially equal to the outer peripheral size of the secondary mirror mounting base 21, and 450 denotes a plurality of trusses. The intermediate base 410 is installed at a position substantially parallel to the primary mirror mounting base 11 and at substantially the same height as the center of curvature 22 of the secondary mirror 2, and the intermediate base 410 and the secondary mirror mounting base 21 are connected to the optical axis. A plurality of trusses 42 extending parallel to 3
0, the intermediate base 410 and the primary mirror mounting base 11
Means a plurality of trusses 45 extending obliquely with respect to the optical axis 3.
The lens barrels 4 are connected to each other by 0. As described above, since each of the plurality of trusses 450 is inclined with respect to the optical axis 3 and extends, light from the celestial body passes through the gap between the adjacent trusses 450 to the primary mirror. Light can be input.
【００１２】実施の形態２における中間ベース４１０と
複数のトラス４２０は、実施の形態１におけるそれぞれ
第一中間ベース４１１と複数のトラス４２０と同じもの
であり、しかして実施の形態２は、前記第一中間ベース
４１１と同じものである中間ベース４１０と主鏡取付ベ
ース１１とを結合することにより、実施の形態１におい
て用いられた第二中間ベース４１２とスパイダ４４０が
不要となる効果があり、しかも主鏡１と副鏡２の相対変
位が曲率中心２２まわりの変位成分となる鏡筒４が得ら
れる効果もある。The intermediate base 410 and the plurality of trusses 420 in the second embodiment are the same as the first intermediate base 411 and the plurality of trusses 420 in the first embodiment, respectively. By coupling the intermediate base 410, which is the same as the one intermediate base 411, to the primary mirror mounting base 11, there is an effect that the second intermediate base 412 and the spider 440 used in the first embodiment become unnecessary, and There is also an effect of obtaining the lens barrel 4 in which the relative displacement between the primary mirror 1 and the secondary mirror 2 is a displacement component around the center of curvature 22.
【００１３】実施の形態３．図３は、本発明における光
学装置の一例たるグレゴリアン反射望遠鏡の実施の形態
３を説明するものであって、上記望遠鏡の鏡筒部の概略
断面図である。図３において、４６０は第一中間ベース
４１１と副鏡取付ベース２１とを結合する筒体であり、
４７０は第二中間ベース４１２と主鏡取付ベース１１と
を結合する筒体である。第一中間ベース４１１と第二中
間ベース４１２とは、前記実施の形態１の場合と同様
に、スパイダ４４０により結合されている。Embodiment 3 FIG. 3 is a schematic cross-sectional view of a Gregorian reflecting telescope according to a third embodiment of the present invention, which is an example of an optical device, and is a schematic sectional view of a lens barrel of the telescope. In FIG. 3, reference numeral 460 denotes a cylindrical body that couples the first intermediate base 411 and the sub mirror mounting base 21;
Reference numeral 470 denotes a cylindrical body that couples the second intermediate base 412 and the primary mirror mounting base 11. The first intermediate base 411 and the second intermediate base 412 are connected by a spider 440 as in the first embodiment.
【００１４】したがって実施の形態３は、実施の形態１
とは、複数のトラス４２０に代えて筒体４６０が、また
複数のトラス４３０に代えて筒体４７０が、それぞれ結
合部材として用いられている点において異なり、その他
の構成は同じである。複数のトラス４２０、４３０に代
えて筒体４６０、４７０が用いられることにより、鏡筒
４の光軸３の方向及び光軸３と垂直な方向の剛性が高く
なる効果がある。Therefore, the third embodiment is different from the first embodiment.
The difference is that a tubular body 460 is used instead of the plurality of trusses 420 and a tubular body 470 is used instead of the plurality of trusses 430 as connecting members, and other configurations are the same. The use of the cylinders 460 and 470 in place of the plurality of trusses 420 and 430 has the effect of increasing the rigidity of the lens barrel 4 in the direction of the optical axis 3 and in the direction perpendicular to the optical axis 3.
【００１５】以上、本発明の光学装置についてグレゴリ
アン反射望遠鏡を例にとって説明したが、本発明は上記
望遠鏡以外の種々の光学装置、就中、副鏡の曲率中心が
主鏡と副鏡との間に位置するような光学機器を包含す
る。また実施の形態１〜３に限っても、それぞれ毎に種
々の変形形態を包含する。例えば実施の形態１、３にお
ける第一中間ベース４１１と第二中間ベース４１２、実
施の形態２における中間ベース４１０などの各環状構造
は、図４におけるリング体４０１のような６角形を呈す
るものであってもよく、あるいは円形リングであっても
よい。前記実施の形態３において、第一中間ベース４１
１と第二中間ベース４１２とが円形リングであると、筒
体４６０および筒体４７０は、いずれも円筒体となる。
またさらに環状の中間ベースは、副鏡の曲率中心と略同
じ高さの位置に設置されることが好ましいが、上記以外
の位置に設置されても鏡筒の光軸の方向および光軸と垂
直な方向の剛性を高めて光学装置の自重などに起因する
光学性能の劣化を防止する効果がある。Although the optical device of the present invention has been described with reference to a Gregorian reflecting telescope as an example, the present invention relates to various optical devices other than the above-described telescope. The optical device as described in the above is included. Further, even in the first to third embodiments, various modifications are included for each. For example, each annular structure such as the first intermediate base 411 and the second intermediate base 412 in the first and third embodiments and the intermediate base 410 in the second embodiment has a hexagonal shape like the ring body 401 in FIG. Or a circular ring. In the third embodiment, the first intermediate base 41
When the first and second intermediate bases 412 are circular rings, both the cylindrical body 460 and the cylindrical body 470 become cylindrical bodies.
Further, the annular intermediate base is preferably installed at a position substantially at the same height as the center of curvature of the sub-mirror, but even if installed at a position other than the above, it is perpendicular to the direction of the optical axis of the lens barrel and the optical axis. This has the effect of increasing the rigidity in various directions to prevent the optical performance from deteriorating due to the weight of the optical device.
【００１６】[0016]
【発明の効果】本発明の光学装置は、以上説明した通
り、（１）主鏡、上記主鏡を取り付ける主鏡取付ベー
ス、上記主鏡に対向配置されると共に上記主鏡からの光
を反射集光する副鏡、上記副鏡を取り付ける副鏡取付ベ
ース、上記主鏡取付ベースと上記副鏡取付ベースの間に
設置されると共に上記主鏡取付ベースと上記副鏡取付ベ
ースとに結合部材により結合された環状の中間ベースを
有する鏡筒を備えたものである。上記中間ベースのない
鏡筒を有する従来の光学装置では、それの姿勢変化時で
の自重や温度分布による不均一な熱膨張により鏡筒が変
形して光学性能が劣化する問題があったが、上記中間ベ
ースが設けられることにより鏡筒の機械的強度が増大し
て自重などに対する耐変形性が向上し、この結果、光学
的劣化が少なくなる効果がある。As described above, the optical device according to the present invention comprises: (1) a primary mirror, a primary mirror mounting base for mounting the primary mirror, and a light source for reflecting light from the primary mirror which is disposed to face the primary mirror. A converging sub-mirror, a sub-mirror mounting base for mounting the sub-mirror, installed between the main mirror mounting base and the sub-mirror mounting base, and connected to the main mirror mounting base and the sub-mirror mounting base by a coupling member. It is provided with a lens barrel having an annular intermediate base connected thereto. In the conventional optical device having the lens barrel without the intermediate base, there has been a problem that the lens barrel is deformed due to non-uniform thermal expansion due to its own weight and temperature distribution at the time of its posture change, and optical performance is deteriorated. By providing the intermediate base, the mechanical strength of the lens barrel is increased, and the resistance to deformation against its own weight and the like is improved. As a result, there is an effect that optical deterioration is reduced.
【００１７】また（２）上記（１）において、中間ベー
スは、主鏡取付ベースとほぼ平行に且つ副鏡の曲率中心
と略同じ中間位置に設置されたものであると、鏡筒の変
形による副鏡と主鏡の相対変位が、副鏡鏡面の曲率中心
周りの回転移動成分となることにより、光軸ずれによる
像の広がりや指向方向ずれといった光学性能の劣化が少
なくなる効果がある。(2) In the above (1), if the intermediate base is installed at an intermediate position substantially parallel to the main mirror mounting base and substantially the same as the center of curvature of the sub-mirror, the lens barrel is deformed. Since the relative displacement between the sub-mirror and the primary mirror becomes a rotational movement component about the center of curvature of the sub-mirror mirror surface, there is an effect that deterioration in optical performance such as image spreading and pointing direction deviation due to optical axis deviation is reduced.
【００１８】また（３）上記（１）または（２）におい
て、中間ベースは、副鏡取付ベースの外周サイズとほぼ
等しい外周サイズを有する第一中間ベース、および主鏡
取付ベースの外周サイズとほぼ等しい外周サイズを有す
る第二中間ベースとから構成されており、上記第一中間
ベースは上記副鏡取付ベースと結合され、上記第二中間
ベースは上記主鏡取付ベースと結合され、且つ上記第一
中間ベースと上記第二中間ベースとは光源から主鏡への
入光を許容する結合部材により結合されものであると、
つぎの効果がある。即ち第一中間ベースおよび第二中間
ベースに光学装置の姿勢変化時における鏡筒の自重によ
る変形や温度分布による熱変形が生じても、第二中間ベ
ースに対する主鏡の相対変位は、副鏡曲率中心まわりの
回転移動成分の割合が大半となり、第一中間ベースに対
する副鏡の相対変位も、副鏡曲率中心まわりの回転移動
成分の割合が大半となる。したがって、主鏡と副鏡の各
相対変位が副鏡曲率中心のまわりの変位成分となる鏡筒
構造が得られることになる。一方、光軸に対して副鏡に
偏心や傾きなどの相対変位が生じると、像の広がりや指
向方向のずれが発生して光学性能が劣化するが、副鏡の
鏡面は球面または球面に近い曲面をなしており、副鏡の
曲率中心のまわりに副鏡が相対変位した場合には上記鏡
面の法線の変化は小さく、よって反射する光の進行方向
のずれも小さいことから、トラスなどの結合部材に光学
装置の姿勢変化による鏡筒の自重や温度分布などにより
変形が生じても光学性能の劣化が少なくなる。(3) In the above (1) or (2), the intermediate base has a first intermediate base having an outer peripheral size substantially equal to the outer peripheral size of the sub mirror mounting base and an outer peripheral size of the main mirror mounting base. A second intermediate base having an equal outer peripheral size, wherein the first intermediate base is coupled to the secondary mirror mounting base, the second intermediate base is coupled to the primary mirror mounting base, and When the intermediate base and the second intermediate base are coupled by a coupling member that allows light from the light source to enter the primary mirror,
The following effects are obtained. That is, even if the first intermediate base and the second intermediate base are deformed due to the weight of the lens barrel when the posture of the optical device changes or thermal deformation due to temperature distribution occurs, the relative displacement of the primary mirror with respect to the second intermediate base is the secondary mirror curvature. The ratio of the rotational movement component around the center becomes the majority, and the relative displacement of the secondary mirror with respect to the first intermediate base also becomes the majority of the rotational movement component around the secondary mirror curvature center. Therefore, a lens barrel structure is obtained in which each relative displacement between the primary mirror and the secondary mirror is a displacement component around the secondary mirror curvature center. On the other hand, when a relative displacement such as eccentricity or tilt occurs in the sub-mirror with respect to the optical axis, the image spreads and a deviation in the directing direction occurs, thereby deteriorating the optical performance, but the mirror surface of the sub-mirror is spherical or nearly spherical. When the sub-mirror is relatively displaced around the center of curvature of the sub-mirror, the change in the normal line of the mirror surface is small, and the deviation in the traveling direction of the reflected light is also small. Even if the coupling member is deformed due to the weight of the lens barrel, temperature distribution, or the like due to a change in the posture of the optical device, deterioration in optical performance is reduced.
【００１９】また（４）上記（３）において、第一中間
ベースと副鏡取付ベースとは筒体により結合され、第二
中間ベースと主鏡取付ベースとは筒体により結合された
ものであると、上記した効果の他に、主鏡取付ベースと
第二中間ベースとの光軸方向および光軸と垂直な方向の
剛性が高く、光軸ずれによる像の広がりや指向方向ずれ
といった光学性能の劣化がさらに少ない鏡筒が得られる
効果がある。(4) In the above (3), the first intermediate base and the secondary mirror mounting base are connected by a cylinder, and the second intermediate base and the primary mirror mounting base are connected by a cylinder. In addition to the effects described above, the rigidity of the primary mirror mounting base and the second intermediate base in the optical axis direction and in the direction perpendicular to the optical axis is high, and optical performance such as image spreading and pointing direction deviation due to optical axis deviation is high. There is an effect that a lens barrel with less deterioration can be obtained.
【００２０】また（５）上記（１）または（２）におい
て、副鏡取付ベースと中間ベースは、互いにほぼ等しい
外周サイズを有し、上記中間ベースと主鏡取付ベースと
は、光源から主鏡への入光を許容する結合部材により結
合されたものであると、前記（１）および（２）などの
発明が有する効果に加えて、前記（３）の発明において
必要であった第一中間ベースと第二中間ベースとを結合
するスパイダのような結合部材および第二中間ベースと
が不要となる効果があり、しかも主鏡と副鏡の相対変位
が副鏡の曲率中心まわりの変位成分となる鏡筒が得られ
る効果もある。(5) In the above (1) or (2), the sub-mirror mounting base and the intermediate base have substantially equal outer peripheral sizes, and the intermediate base and the main mirror mounting base are separated from the light source by the primary mirror. When they are connected by a connecting member that allows light to enter the first intermediate, the first intermediate which is necessary in the invention of (3) in addition to the effects of the inventions of (1) and (2), etc. There is an effect that a connecting member such as a spider for connecting the base and the second intermediate base and the second intermediate base are unnecessary, and the relative displacement between the primary mirror and the secondary mirror is a displacement component around the center of curvature of the secondary mirror. There is also an effect that a lens barrel can be obtained.
【００２１】またさらに（６）上記（１）〜（５）のい
ずれか一項において、光学装置は反射望遠鏡であると、
光学性能の劣化が少ない大型乃至超大型の反射望遠鏡を
製造することができる大きな効果がある。(6) In any one of the above (1) to (5), if the optical device is a reflection telescope,
There is a great effect that a large to very large reflecting telescope with little deterioration in optical performance can be manufactured.
【図１】 本発明における光学装置の実施の形態１の一
部概略断面図。FIG. 1 is a partial schematic cross-sectional view of Embodiment 1 of an optical device according to the present invention.
【図２】 本発明における光学装置の実施の形態２の一
部概略断面図。FIG. 2 is a partial schematic cross-sectional view of Embodiment 2 of the optical device according to the present invention.
【図３】 本発明における光学装置の実施の形態３の一
部概略断面図。FIG. 3 is a partial schematic cross-sectional view of Embodiment 3 of the optical device according to the present invention.
【図４】 従来の光学装置の一部斜視図。FIG. 4 is a partial perspective view of a conventional optical device.
【図５】 図４のV − V線に沿った概略断面図。FIG. 5 is a schematic sectional view taken along the line VV of FIG. 4;
１ 主鏡、１１ 主鏡取付ベース、２ 副鏡、２１ 副
鏡取付ベース、２２ 副鏡の曲率中心、３ 光軸、４
鏡筒 ４１０ 中間ベース、４１１ 第一中間ベース、
４１２ 第二中間ベース、４２０ トラス、４４０ ス
パイダ、 ４３０ トラス、４５０ トラス、４６０
筒体、４７０ 筒体。1 Primary mirror, 11 Primary mirror mounting base, 2 Secondary mirror, 21 Secondary mirror mounting base, 22 Center of curvature of secondary mirror, 3 optical axes, 4
Lens barrel 410 intermediate base, 411 first intermediate base,
412 second intermediate base, 420 truss, 440 spider, 430 truss, 450 truss, 460
Cylindrical body, 470 cylindrical body.
Claims (6)
ース、上記主鏡に対向配置されると共に上記主鏡からの
光を反射集光する副鏡、上記副鏡を取り付ける副鏡取付
ベース、上記主鏡取付ベースと上記副鏡取付ベースの間
に設置されると共に上記主鏡取付ベースと上記副鏡取付
ベースとに結合部材により結合された環状の中間ベース
を有する鏡筒を備えたことを特徴とする光学装置。1. A primary mirror, a primary mirror mounting base for mounting the primary mirror, a secondary mirror disposed to face the primary mirror and reflecting and condensing light from the primary mirror, and a secondary mirror mounting base for mounting the secondary mirror A lens barrel having an annular intermediate base installed between the primary mirror mounting base and the secondary mirror mounting base and coupled to the primary mirror mounting base and the secondary mirror mounting base by a coupling member. An optical device characterized by the above-mentioned.
行に且つ副鏡の曲率中心と略同じ中間位置に設置された
ことを特徴とする請求項１記載の光学装置。2. The optical device according to claim 1, wherein the intermediate base is provided at an intermediate position substantially parallel to the primary mirror mounting base and substantially the same as the center of curvature of the secondary mirror.
イズとほぼ等しい外周サイズを有する第一中間ベース、
および主鏡取付ベースの外周サイズとほぼ等しい外周サ
イズを有する第二中間ベースとから構成されており、上
記第一中間ベースは上記副鏡取付ベースと結合され、上
記第二中間ベースは上記主鏡取付ベースと結合され、且
つ上記第一中間ベースと上記第二中間ベースとは光源か
ら主鏡への入光を許容する結合部材により結合されたこ
とを特徴とする請求項１または請求項２記載の光学装
置。3. The intermediate base has a first intermediate base having an outer peripheral size substantially equal to an outer peripheral size of the sub mirror mounting base.
And a second intermediate base having an outer peripheral size substantially equal to the outer peripheral size of the primary mirror mounting base, wherein the first intermediate base is coupled to the sub mirror mounting base, and the second intermediate base is connected to the primary mirror. 3. The device according to claim 1, wherein the first intermediate base and the second intermediate base are coupled to each other by a coupling member that allows light from the light source to enter the primary mirror. Optical device.
体により結合され、第二中間ベースと主鏡取付ベースと
は筒体により結合されたことを特徴とする請求項３記載
の光学装置。4. The optical system according to claim 3, wherein the first intermediate base and the secondary mirror mounting base are connected by a cylindrical body, and the second intermediate base and the primary mirror mounting base are connected by a cylindrical body. apparatus.
ほぼ等しい外周サイズを有し、上記中間ベースと主鏡取
付ベースとは、光源から主鏡への入光を許容する結合部
材により結合されたことを特徴とする請求項１または請
求項２記載の光学装置。5. The sub-mirror mounting base and the intermediate base have substantially equal outer peripheral sizes, and the intermediate base and the main mirror mounting base are coupled by a coupling member that allows light from the light source to enter the primary mirror. The optical device according to claim 1 or 2, wherein:
項１〜請求項５のいずれか一項記載の光学装置。6. The optical device according to claim 1, wherein the optical device is a reflection telescope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001012145A JP4056703B2 (en) | 2001-01-19 | 2001-01-19 | Optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001012145A JP4056703B2 (en) | 2001-01-19 | 2001-01-19 | Optical device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002214537A true JP2002214537A (en) | 2002-07-31 |
| JP4056703B2 JP4056703B2 (en) | 2008-03-05 |
Family
ID=18879194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001012145A Expired - Fee Related JP4056703B2 (en) | 2001-01-19 | 2001-01-19 | Optical device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4056703B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012103332A (en) * | 2010-11-08 | 2012-05-31 | Nano Optonics Energy Co Ltd | Altazimuth mount type reflecting telescope |
| JP2015180948A (en) * | 2015-05-19 | 2015-10-15 | 有限会社アストロエアロスペース | Altazimuth table mounted reflector telescope and drive mechanism of altazimuth mounted reflector telescope |
| CN111033346A (en) * | 2017-08-22 | 2020-04-17 | 赛峰电子与防务公司 | Telescope easy to install and method for adjusting the telescope |
| CN114296211A (en) * | 2021-12-30 | 2022-04-08 | 中国科学院长春光学精密机械与物理研究所 | High-precision secondary mirror repeated positioning device |
| CN115308918A (en) * | 2022-09-29 | 2022-11-08 | 中国科学院长春光学精密机械与物理研究所 | Machine body device of large-caliber coaxial collimator |
| CN117055188A (en) * | 2023-10-13 | 2023-11-14 | 长春国宇光学科技有限公司 | Method for installing and adjusting coaxial three-reflector remote sensing optical system |
-
2001
- 2001-01-19 JP JP2001012145A patent/JP4056703B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012103332A (en) * | 2010-11-08 | 2012-05-31 | Nano Optonics Energy Co Ltd | Altazimuth mount type reflecting telescope |
| JP2015180948A (en) * | 2015-05-19 | 2015-10-15 | 有限会社アストロエアロスペース | Altazimuth table mounted reflector telescope and drive mechanism of altazimuth mounted reflector telescope |
| CN111033346A (en) * | 2017-08-22 | 2020-04-17 | 赛峰电子与防务公司 | Telescope easy to install and method for adjusting the telescope |
| CN111033346B (en) * | 2017-08-22 | 2021-03-12 | 赛峰电子与防务公司 | Telescope easy to install and method for adjusting the telescope |
| CN114296211A (en) * | 2021-12-30 | 2022-04-08 | 中国科学院长春光学精密机械与物理研究所 | High-precision secondary mirror repeated positioning device |
| CN115308918A (en) * | 2022-09-29 | 2022-11-08 | 中国科学院长春光学精密机械与物理研究所 | Machine body device of large-caliber coaxial collimator |
| CN115308918B (en) * | 2022-09-29 | 2023-01-03 | 中国科学院长春光学精密机械与物理研究所 | Machine body device of large-caliber coaxial collimator |
| CN117055188A (en) * | 2023-10-13 | 2023-11-14 | 长春国宇光学科技有限公司 | Method for installing and adjusting coaxial three-reflector remote sensing optical system |
| CN117055188B (en) * | 2023-10-13 | 2023-12-12 | 长春国宇光学科技有限公司 | Method for installing and adjusting coaxial three-reflector remote sensing optical system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4056703B2 (en) | 2008-03-05 |
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