JPH0215227A - Reflex telescope spider supporting structure - Google Patents
Reflex telescope spider supporting structureInfo
- Publication number
- JPH0215227A JPH0215227A JP16630188A JP16630188A JPH0215227A JP H0215227 A JPH0215227 A JP H0215227A JP 16630188 A JP16630188 A JP 16630188A JP 16630188 A JP16630188 A JP 16630188A JP H0215227 A JPH0215227 A JP H0215227A
- Authority
- JP
- Japan
- Prior art keywords
- spider
- observation
- infrared
- reflector
- plate
- 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
- 241000239290 Araneae Species 0.000 title claims abstract description 43
- 230000011514 reflex Effects 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000002441 reversible effect Effects 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract 2
- 230000007423 decrease Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
Landscapes
- Telescopes (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は星雲やブラックホールなどの天体を観測する
分野に用いられる反射望遠鏡装置、特にその反射望遠鏡
スパイダ支持構造体に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reflecting telescope device used in the field of observing celestial bodies such as nebulae and black holes, and particularly to a reflecting telescope spider support structure thereof.
［従来の技術］
第３図は一般的な望遠鏡装置を示す斜視図であり、第４
図はその機能を説明するための概略断面図でおる。図に
おいて、（１）は望遠鏡を載置するための基部構造物で
、自身はＡＺの矢印方向に垂直軸のまわりに回転可能で
あり、そして望遠鏡をＥＬの矢印方向に水平軸のまわり
に回転可能に担持している。（２）は主反射鏡、（２ａ
）は主反射鏡（２）に開けられた穴、（３）は主反射鏡
（２）を支持するミラーセル、（５）は副反射鏡、（６
）は副反射鏡（５）を支持するスパイダ支持構造体（以
下単にスパイダと称す）、（４）はミラセル（３）に取
り付けられ副反射鏡（５）およびスパイダ（６）を保持
するフレームで必る。（７）は観測装置、（８）は例え
ば天体からの赤外線等の観測信号でおる。[Prior Art] Fig. 3 is a perspective view showing a general telescope device;
The figure is a schematic sectional view for explaining its function. In the figure, (1) is a base structure for mounting the telescope, which can rotate around a vertical axis in the direction of the AZ arrow, and around a horizontal axis in the direction of the EL arrow. Possibly supported. (2) is the main reflecting mirror, (2a
) is the hole drilled in the main reflector (2), (3) is the mirror cell that supports the main reflector (2), (5) is the sub-reflector, (6
) is a spider support structure (hereinafter simply referred to as spider) that supports the sub-reflector (5), and (4) is a frame that is attached to the Miracell (3) and holds the sub-reflector (5) and the spider (6). Must have. (7) is an observation device, and (8) is an observation signal such as infrared rays from a celestial body.
次に動作について説明する。例えば観測中の天体から届
く観測信号（８）は第４図中の矢印に沿い主反射鏡（２
）に集光される。主反射鏡（２）は観測信号（３）を副
反射鏡（５）に向けて反射させる。その反射光は副反射
鏡（５）で再び反射させられ、主反射鏡（２）の中心に
開けられた穴（２ａ）を通過し、観測装置（旬に集光す
る。第４図にて明らかなように、主反射鏡（２）および
副反射鏡（５）は例えばパラホラ、バイパラボラの関係
を持つように鏡面が曲面加工しであるため、例えば観測
装置（７）の上に観測信号（８）の焦点を結ふように構
成されている。Next, the operation will be explained. For example, the observation signal (8) received from the celestial body being observed is sent to the main reflector (2) along the arrow in Figure 4.
). The main reflecting mirror (2) reflects the observation signal (3) toward the sub-reflecting mirror (5). The reflected light is reflected again by the sub-reflector (5), passes through the hole (2a) made in the center of the main reflector (2), and is focused on the observation device (see Figure 4). As is clear, the mirror surfaces of the main reflecting mirror (2) and the sub-reflecting mirror (5) are curved so as to have a parabolic or biparabolic relationship, for example, so that the observation signal cannot be detected on the observation device (7). It is structured to focus on (8).
［発明が解決しようとする課題］
上記のような従来の赤外線望遠鏡装置は次のような欠点
があった。第５図および第７図についてそれを詳細に説
明する。スパイダ（６）は主反射鏡（２）に対向する面
（６ａ）から自分の温度（はぼ常温）の雑音赤外線（１
０）を輻射し主反射鏡（２）に入射させるため、図の矢
印のように、副反射鏡（５）を介して観測装置（７）に
スパイダ（６）の温度の信号を受信させる。一方、天体
から到来する観測信号（８）も、本図では省略するか、
当然観測装置（７）に入る。従−って、スパイダ（６）
の発生する雑音赤外線（１０）は不用な雑音として信号
のＳ／Ｎ比（信号／′ノイズ比）を劣化させる。この劣
化率はスパイダ（６）が主反射鏡（２）の鏡面部に投影
するスパイダ（６）の投影面積（６ｂ）と主反射鏡（２
）の面積の比にて表される（第７図参照）。従来この面
積比をできるだけ小さくする方向での解決方法が採られ
てきたが、副反射鏡（５）やスパイダ（６）の自重を支
えるためにはスパイダ（６）の板厚には限界があり、大
幅に雑音信号を取り除くことはできなかった。[Problems to be Solved by the Invention] The conventional infrared telescope device as described above has the following drawbacks. This will be explained in detail with reference to FIGS. 5 and 7. The spider (6) emits noise infrared rays (1
0) to be incident on the main reflecting mirror (2), the observation device (7) receives the temperature signal of the spider (6) via the sub-reflecting mirror (5) as shown by the arrow in the figure. On the other hand, the observation signal (8) arriving from the celestial body is also omitted in this diagram, or
Naturally, it enters the observation device (7). Therefore, spider (6)
The noise infrared rays (10) generated by the signal degrade the S/N ratio (signal/'noise ratio) of the signal as unnecessary noise. This deterioration rate is calculated by the projected area (6b) of the spider (6) projected by the spider (6) onto the mirror surface of the main reflector (2) and the
) (see Figure 7). Conventionally, solutions have been taken to reduce this area ratio as much as possible, but there is a limit to the thickness of the spider (6) in order to support the weight of the sub-reflector (5) and spider (6). , it was not possible to significantly remove the noise signal.
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、スパイダ（６）の強さを変えずにスパイダ
（６）の主反射鏡（２）に対向する面（６ａ）から発す
る雑音赤外線（１０）を軽減したスパイダを得、しかも
普通の光観測の望遠鏡用のスパイダとしても利用できる
スパイダを得ることを目的とする。This invention was made in order to solve the above-mentioned problems, and it is possible to reduce the distance from the surface (6a) of the spider (6) facing the main reflecting mirror (2) without changing the strength of the spider (6). The purpose is to obtain a spider which reduces the noise infrared rays (10) emitted and which can also be used as a spider for a telescope for ordinary optical observation.
［課題を解決するための手段］
この発明に係るスパイダ（６）は主反射鏡（２）に対向
する面（６ａ）に赤外線領域において輻射率の小さい材
料にて構成されて研摩されている面と黒色塗装された面
とを表裏に有する板を反転可能に装着したものである。[Means for Solving the Problems] The spider (6) according to the present invention has a polished surface made of a material with low emissivity in the infrared region on the surface (6a) facing the main reflecting mirror (2). The plate is reversibly mounted and has a black painted surface on the front and back.
［作用］
この発明においては、スパイダ（６）の主反射鏡（２）
に対向した面（６ａ）を赤外線領域において低い輻射率
を持つ材料にて構成されて高い反射率の研摩面にすると
スパイダ（６）の出す雑音赤外線の割合か低下して赤外
線観測用として利用でき、反転させて黒色塗装の面を表
にすると可視光を吸収して普通の光観測用として利用で
きる。[Function] In this invention, the main reflecting mirror (2) of the spider (6)
If the surface (6a) facing the spider (6a) is made of a material with a low emissivity in the infrared region and is made of a polished surface with a high reflectance, the ratio of noise infrared rays emitted by the spider (6) will be reduced, making it unusable for infrared observation. When turned upside down to expose the black painted side, it absorbs visible light and can be used for ordinary light observation.
［実施例］
第１図および第２図はこの発明の一実施例の要部を示す
図である。なお、第２図は第１図の円（Ｒ）部を拡大し
て示す図である。（６）はスパイダ、（１１）はアルミ
ニウム製の金属板、（１１ａ）は板（１１）の研摩面、
（１１ｂ）は金属板に黒色塗装を施した面、（１２）は
スパイダ（６）から出た腕で金属板（１１）を矢印の方
向に回転させることができるように金属板（１１）の端
部を支持する腕である。[Embodiment] FIGS. 1 and 2 are diagrams showing essential parts of an embodiment of the present invention. Note that FIG. 2 is an enlarged view of the circle (R) portion in FIG. 1. (6) is a spider, (11) is an aluminum metal plate, (11a) is a polished surface of the plate (11),
(11b) is a metal plate painted black, and (12) is a side of the metal plate (11) that can be rotated in the direction of the arrow with the arm coming out of the spider (6). This is the arm that supports the end.
赤外線観測時には金属板（１１）の研摩面（ｌｌａ）を
主反射鏡（２）に対向させ、光学観測時には金属板（１
１）の黒色塗装面（１１ｂ）を主反射鏡（２）に対向さ
せることにより光学、赤外両方の観測に用いうるスパイ
ダとなる。During infrared observation, the polished surface (lla) of the metal plate (11) faces the main reflecting mirror (2), and during optical observation, the polished surface (lla) of the metal plate (11) faces the main reflector (2).
By making the black painted surface (11b) of 1) face the main reflecting mirror (2), it becomes a spider that can be used for both optical and infrared observations.
主反射鏡（２）に板（１１）のアルミニウム研摩面（１
１ａ）を向けて赤外線観測用としたとき、スパイダ（６
）の発する熱雑音量は次の式で表される。The aluminum polished surface (1) of the plate (11) is attached to the main reflector (2).
1a) for infrared observation, the spider (6
) is expressed by the following formula.
熱雑音量（％）＝εｘ Ａｓ÷Ａｍ
ここで、ＡＳ：スパイダ投影面積（６ｂ）へｍ：主反射
鏡（２）の面積
ε ニアルミニウム研摩面の輻射率
従来、スパイダ表面は塗膜であったため、εはほぼ０．
９〜１．０であったが、本発明の一実施例のアルミニウ
ム研磨面では０．０４となるため、スパイダの発する熱
雑音量が１７２０以下に軽減される。Thermal noise amount (%) = εx As÷Am Where, AS: Spider projected area (6b) m: Area of main reflector (2) ε Emissivity of aluminum polished surface Conventionally, the spider surface was a coating film. Therefore, ε is almost 0.
9 to 1.0, but on the aluminum polished surface of one embodiment of the present invention, it becomes 0.04, so the amount of thermal noise generated by the spider is reduced to 1720 or less.
４゜
また主反射鏡（２）に板（１１）の黒色塗装面（１１ｂ
）を向けると、これは可視光を反射せず吸収するので、
観測装置（７）にノイズとなる可視光線を入射させない
。4゜Also, the black painted surface (11b) of the plate (11) is attached to the main reflecting mirror (2).
), it absorbs visible light without reflecting it, so
Visible light that causes noise is not allowed to enter the observation device (7).
なお、上記実施例では副反射鏡（５）を支持するスパイ
ク（６）に関して述べられているか、第３鏡支持スパイ
ダ（図示は省略）なと、その他のスパイクに適用しても
全く同等の効果を奏する。加えて、副反射鏡（５）に代
えて観測装置（７）を支持Ｊ−る場合があるが、この際
のスパイダ支持構造体に適用しても同等の効果が得られ
る。In addition, in the above embodiment, the spike (6) that supports the sub-reflector (5) is described, or even if it is applied to other spikes such as the third mirror support spider (not shown), the same effect will be obtained. play. In addition, although there are cases where the observation device (7) is supported instead of the sub-reflector (5), the same effect can be obtained even if it is applied to the spider support structure in this case.
［発明の効果１
この発明は以上説明したとおり、スパイダの主反射鏡に
面する個所に表裏に異なる性質の面を持つ板を反転可能
に装着したので、赤外線観測を高い精度で行える一方、
普通の可視光線の観測をも雑音可視光かない状態で行う
ことかできるという効果がある。[Effect of the invention 1] As explained above, in this invention, a plate with different properties on the front and back is reversibly attached to the part of the spider that faces the main reflecting mirror, so that infrared observation can be performed with high precision,
This has the effect of making it possible to observe ordinary visible light without any visible light noise.
第１図はこの発明の一実施例によるスパイダを示す図、
第２図は第１図の円（Ｒ）の部分を拡大して示す図、第
３図はスパイダを有する一般的な望遠＠装置を示す斜視
図、第４図はその光学系を示す図、第５図は従来のスバ
、イダを有する望遠鏡の光学系を示す図、第６図は第５
図のスパイダの右側面を拡大して示す図、第７図はスパ
イダの主反射鏡に占める投影面積を示す図でおる。
図において、（１）は基部構造物、（２）は主反射鏡、
（３）はミラーセル、（４）はフレーム、（５〉は副反
射鏡、（６）はスパイダ、（６ａ）はスパイダ（６）の
主反射鏡（２）に対向する面、（７）は観測装置、（８
）は観測信号、（９）は光軸、（１０）は雑音赤外線、
（１１）は反転可能な板、（１１ａ）はアルミニウム研
摩面、（１１ｂ）は黒色塗装面、（１２）は支持腕であ
る。
なお、各図中同一符号は同一または相当部分を示す。FIG. 1 is a diagram showing a spider according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the circle (R) in FIG. 1, FIG. 3 is a perspective view of a general telephoto device with a spider, and FIG. 4 is a diagram showing its optical system. Figure 5 is a diagram showing the optical system of a conventional telescope with Suba and Ida, and Figure 6 is a diagram showing the optical system of a conventional telescope with Suba and Ida.
FIG. 7 is an enlarged view of the right side of the spider shown in the figure, and is a view showing the projected area of the spider on the main reflecting mirror. In the figure, (1) is the base structure, (2) is the main reflector,
(3) is the mirror cell, (4) is the frame, (5> is the sub-reflector, (6) is the spider, (6a) is the surface of the spider (6) facing the main reflector (2), and (7) is the Observation device, (8
) is the observation signal, (9) is the optical axis, (10) is the noise infrared,
(11) is a reversible plate, (11a) is an aluminum polished surface, (11b) is a black painted surface, and (12) is a support arm. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
この主反射鏡にて反射された光を集光し観測装置に向け
て反射させる主反射鏡に対向する副反射鏡、およびこの
副反射鏡にて反射された光を観測する観測装置を備えた
反射望遠鏡装置に使用される副反射鏡等を支持する反射
望遠鏡スパイダ支持構造体において、この反射望遠鏡ス
パイダ支持構造体の主反射鏡に対向した面に赤外線領域
において輻射率の小さい材料にて構成され研摩されてい
る表面と黒色塗装された裏面とを有する板を反転可能に
装着したことを特徴とする反射鏡スパイダ支持構造体。(1) A main reflector that collects and reflects light in the infrared region, etc.
A sub-reflector facing the main reflector that collects the light reflected by the main reflector and reflects it toward the observation device, and an observation device that observes the light reflected by the sub-reflector. In a reflecting telescope spider support structure that supports a sub-reflector etc. used in a reflecting telescope device, the surface of the reflecting telescope spider support structure facing the main reflector is made of a material with low emissivity in the infrared region. A reflector spider support structure comprising a reversibly mounted plate having a polished surface and a black-painted back surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16630188A JPH0758370B2 (en) | 1988-07-04 | 1988-07-04 | Reflective telescope spider support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16630188A JPH0758370B2 (en) | 1988-07-04 | 1988-07-04 | Reflective telescope spider support structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0215227A true JPH0215227A (en) | 1990-01-18 |
| JPH0758370B2 JPH0758370B2 (en) | 1995-06-21 |
Family
ID=15828810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16630188A Expired - Fee Related JPH0758370B2 (en) | 1988-07-04 | 1988-07-04 | Reflective telescope spider support structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0758370B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6676262B1 (en) * | 1996-01-31 | 2004-01-13 | Goulven J Vernois | Telescope |
| GB2437316A (en) * | 2006-04-22 | 2007-10-24 | Zeiss Carl Optronics Gmbh | Telescope for optical free space communication |
| FR3090135A1 (en) * | 2018-12-18 | 2020-06-19 | Thales | Telescope comprising a secondary mirror mounted on “spider” blades comprising an anti-stray light device |
-
1988
- 1988-07-04 JP JP16630188A patent/JPH0758370B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6676262B1 (en) * | 1996-01-31 | 2004-01-13 | Goulven J Vernois | Telescope |
| GB2437316A (en) * | 2006-04-22 | 2007-10-24 | Zeiss Carl Optronics Gmbh | Telescope for optical free space communication |
| FR3090135A1 (en) * | 2018-12-18 | 2020-06-19 | Thales | Telescope comprising a secondary mirror mounted on “spider” blades comprising an anti-stray light device |
| EP3671303A1 (en) * | 2018-12-18 | 2020-06-24 | Thales | Telescope comprising a secondary mirror mounted on web blades comprising a parasite anti-light device |
| EP3671303B1 (en) * | 2018-12-18 | 2021-08-25 | Thales | Telescope comprising a secondary mirror mounted on web blades comprising a parasite anti-light device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0758370B2 (en) | 1995-06-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |