JPH0758370B2 - Reflective telescope spider support structure - Google Patents
Reflective telescope spider support structureInfo
- Publication number
- JPH0758370B2 JPH0758370B2 JP16630188A JP16630188A JPH0758370B2 JP H0758370 B2 JPH0758370 B2 JP H0758370B2 JP 16630188 A JP16630188 A JP 16630188A JP 16630188 A JP16630188 A JP 16630188A JP H0758370 B2 JPH0758370 B2 JP H0758370B2
- Authority
- JP
- Japan
- Prior art keywords
- spider
- reflecting mirror
- main reflecting
- sub
- observation
- 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.)
- Expired - Fee Related
Links
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- Telescopes (AREA)
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。Description: TECHNICAL FIELD The present invention relates to a reflecting telescope device used in the field of observing celestial bodies such as nebulae and black holes, and more 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ある。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）はミラーセル
（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ある。（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ある。[Prior Art] FIG. 3 is a perspective view showing a general telescope device.
The figure is a schematic cross-sectional view for explaining its function. In the figure, (1) is a base structure for mounting the telescope, which itself can rotate about the vertical axis in the direction of the arrow AZ, and rotates the telescope about the horizontal axis in the direction of the arrow EL. Carry possible. (2) is a main reflecting mirror, (2a) is a hole formed in the main reflecting mirror (2), (3) is a mirror cell for supporting the main reflecting mirror (2), (5) is a sub-reflecting mirror,
(6) is a spider support structure (hereinafter simply referred to as "spider") that supports the sub-reflector (5), and (4) is attached to the mirror cell (3) and holds the sub-reflector (5) and the spider (6). It is a frame. (7) is an observation device,
(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（８）
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（７）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）は例えばパラボラ、ハイパボラの関
係を持つように鏡面が曲面加工してあるため、例えば観
測装置（７）の上に観測信号（８）の焦点を結ぶように
構成されている。Next, the operation will be described. For example, the observation signal (8) that arrives from the celestial body under observation is focused on the main reflecting mirror (2) along the arrow in FIG. The main reflector (2) is the observation signal (8)
Is reflected toward the sub-reflecting mirror (5). The reflected light is reflected again by the sub-reflecting mirror (5), passes through the hole (2a) formed in the center of the main reflecting mirror (2), and is focused on the observation device (7). As is clear from FIG. 4, the main reflecting mirror (2) and the sub-reflecting mirror (5) have, for example, curved mirror surfaces so as to have a parabola-hyperbora relationship, and therefore, for example, the observation device (7) It is configured to focus the observation signal (8) on the top.
［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（ほぼ常温）の雑音赤外線（10）
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、本図では省略するが、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. It will be described in detail with reference to FIGS. 5 and 7. The spider (6) is a noise infrared ray (10) at its own temperature (approximately room temperature) from the surface (6a) facing the main reflecting mirror (2).
In order to radiate the light into the main reflecting mirror (2) and cause it to enter the main reflecting mirror (2), the observation device (7) receives a signal of the temperature of the spider (6) via the sub reflecting mirror (5). On the other hand, the observation signal (8) coming from the celestial body also enters the observation device (7) although it is omitted in the figure. Therefore, the noise infrared ray (10) generated by the spider (6) deteriorates the signal S / N ratio (signal / noise ratio) as unnecessary noise. This deterioration rate is represented by the ratio of the projected area (6b) of the spider (6) projected by the spider (6) onto the mirror surface of the main reflecting mirror (2) and the area of the main reflecting mirror (2) (seventh). See figure). Conventionally, there has been adopted a solution to reduce the area ratio as much as possible, but there is a limit to the plate thickness of the spider (6) in order to support the weight of the sub-reflecting mirror (5) and the spider (6). , The noise signal could not be removed significantly.
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。The present invention has been made to solve the above-mentioned problems, and from the surface (6a) facing the main reflecting mirror (2) of the spider (6) without changing the strength of the spider (6). The object is to obtain a spider that reduces the emitted noise infrared rays (10) and can also be used as a spider for a normal optical observation telescope.
［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 surface (6a) facing the main reflecting mirror (2) that is made of a material having a low emissivity in the infrared region and is polished. A plate having a black-painted surface and a black-painted surface on the front and back is reversibly attached.
［作用］ この発明においては、スパイダ（６）の主反射鏡（２）
の対向した面（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た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が低下して赤外線
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。[Operation] In the present invention, the main reflecting mirror (2) of the spider (6)
If the surface (6a) facing each other is a polished surface with a high reflectivity made of a material having a low emissivity in the infrared region, the ratio of noise infrared rays emitted by the spider (6) will decrease and it can be used for infrared observation. , If the surface of the black coating is turned upside down, 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] FIG. 1 and FIG. 2 are views showing an essential part of an embodiment of the present invention. 2 is an enlarged view of the circle (R) portion of FIG. (6) is a spider, (11) is a metal plate made of aluminum, (11a) is a polished surface of the plate (11), (11b)
Is a black-painted surface of the metal plate, and (12) is an end of the metal plate (11) so that the arm of the spider (6) can rotate the metal plate (11) in the direction of the arrow. It is a supporting arm.
赤外線観測時には金属板（11）の研摩面（11a）を主反
射鏡（２）に対向させ、光学観測時には金属板（11）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 (11a) of the metal plate (11) faces the main reflecting mirror (2), and during optical observation, the black coated surface (11b) of the metal plate (11) faces the main reflecting mirror (2). This makes it 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（11
a）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 surface (11) of the plate (11) is attached to the main reflecting mirror (2).
When a) is pointed at for infrared observation, the spider (6)
The amount of thermal noise generated by is expressed by the following equation.
熱雑音量（％）＝ε×As÷Am ここで、As:スパイダ投影面積（6b） Am:主反射鏡（２）の面積 ε：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
1/20以下に軽減される。Thermal noise amount (%) = ε x As ÷ Am where As: Spider projected area (6b) Am: Area of main reflecting mirror (2) ε: Emissivity of abraded aluminum surface Conventionally, the spider surface is a coating film. Therefore, ε is approximately 0.9
However, the amount of thermal noise generated by the spider is 0.04 for the aluminum polished surface of one embodiment of the present invention.
Reduced to less than 1/20.
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。Further, when the black coating surface (11b) of the plate (11) is directed to the main reflecting mirror (2), it absorbs visible light without reflecting it, so that visible light that causes noise is not incident on 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
ダ（６）に関して述べられているが、第３鏡支持スパイ
ダ（図示は省略）など、その他のスパイダに適用しても
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）を支持する場合があるが、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, although the spider (6) supporting the sub-reflecting mirror (5) is described in the above-described embodiment, the same effect can be obtained even when applied to other spiders such as a third mirror supporting spider (not shown). Play. In addition, the observation device (7) may be supported instead of the sub-reflecting mirror (5), but the same effect can be obtained by applying the observation device (7) to the spider support structure at this time.
［発明の効果］ 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がない状態で行う
ことができるという効果がある。[Effects of the Invention] As described above, according to the present invention, since the plates having the different surfaces on the front and back are reversibly attached to the part facing the main reflecting mirror of the spider, infrared observation can be performed with high accuracy.
There is an effect that ordinary visible light can be observed in the absence of noise visible light.
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鏡装置を示す斜視
図、第４図はその光学系を示す図、第５図は従来のスパ
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ある。 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、（1
1）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,
2 is an enlarged view of the circle (R) in FIG. 1, FIG. 3 is a perspective view showing a general telescope device having a spider, and FIG. 4 is a view showing its optical system. FIG. 5 is a view showing an optical system of a telescope having a conventional spider, FIG. 6 is an enlarged view of the right side surface of the spider of FIG. 5, and FIG. 7 is a projection area occupied by the main reflecting mirror of the spider. It is a figure. In the figure, (1) is a base structure, (2) is a main reflector,
(3) is a mirror cell, (4) is a frame, (5) is a sub-reflecting mirror, (6) is a spider, (6a) is a surface facing the main reflecting mirror (2) of the spider (6), and (7) is Observation equipment, (8)
Is the observed signal, (9) is the optical axis, (10) is noise infrared, (1
1) is a reversible plate, (11a) is an aluminum polished surface,
(11b) is a black painted surface, and (12) is a supporting arm. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
射鏡、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 reflecting mirror that collects and reflects light in the infrared region and the like, and a sub-reflecting mirror that faces the main reflecting mirror that collects the light reflected by this main reflecting mirror and reflects it toward the observation device. , And a reflection telescope spider support structure supporting a sub-reflector or the like used in a reflection telescope device equipped with an observation device for observing the light reflected by the sub-reflector, in the reflection telescope spider support structure. A reflector mirror spider support characterized in that a plate having a polished front surface and a black-painted rear surface made of a material having a low emissivity in the infrared region is reversibly mounted on the surface facing the main reflector. Structure.
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 JPH0215227A (en) | 1990-01-18 |
| JPH0758370B2 true 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) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6676262B1 (en) * | 1996-01-31 | 2004-01-13 | Goulven J Vernois | Telescope |
| DE102006018743A1 (en) * | 2006-04-22 | 2007-10-25 | Carl Zeiss Optronics Gmbh | Telescope for optical free-space telecommunications |
| 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
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0215227A (en) | 1990-01-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |