JPS606744Y2 - Fourier transform spectrometer - Google Patents
Fourier transform spectrometerInfo
- Publication number
- JPS606744Y2 JPS606744Y2 JP8466176U JP8466176U JPS606744Y2 JP S606744 Y2 JPS606744 Y2 JP S606744Y2 JP 8466176 U JP8466176 U JP 8466176U JP 8466176 U JP8466176 U JP 8466176U JP S606744 Y2 JPS606744 Y2 JP S606744Y2
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- fourier transform
- gas
- half mirror
- gas cell
- 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
Links
Landscapes
- Spectrometry And Color Measurement (AREA)
Description
【考案の詳細な説明】
本考案はフーリエ変換型分光器の改良に関するものであ
る。[Detailed Description of the Invention] The present invention relates to an improvement of a Fourier transform spectrometer.
第１図はマイケルソンの干渉計を用いた従来のフーリエ
変換型分光器を示すもので、１は光源、２はハーフミラ
−１３は固定ミラー ４は可動ミラー ５は検知器で、
光源１の光は一方でハーフミラ−２を通って固定ミラー
３で反射され、さらにハーフミラ−２で反射されて検知
器５に至り、他方、ハーフミラ−２で反射された光源１
の光は可動ミラー４で反射されハーフミラ−２を通って
検知器５に送られるが、前記可動ミラー４をねじ機構等
の機械的手段によって図の矢印方向に移動させて、前記
検知器５に送られる二つの光に光路差を与えてフーリエ
変換分光を行なうようになっている。Figure 1 shows a conventional Fourier transform spectrometer using a Michelson interferometer, where 1 is a light source, 2 is a half mirror, 13 is a fixed mirror, 4 is a movable mirror, and 5 is a detector.
The light from the light source 1 passes through the half mirror 2 and is reflected by the fixed mirror 3, and is further reflected by the half mirror 2 to reach the detector 5. On the other hand, the light from the light source 1 that is reflected by the half mirror 2
The light is reflected by the movable mirror 4 and sent to the detector 5 through the half mirror 2.The movable mirror 4 is moved in the direction of the arrow in the figure by mechanical means such as a screw mechanism, and the light is transmitted to the detector 5 through the half mirror 2. Fourier transform spectroscopy is performed by giving an optical path difference to the two transmitted lights.
このように従来のフーリエ変換型分光器においては光路
長の変化をつけるために可動ミラーを機械的手段によっ
て移動させるため、１μ肌程度の短かい波長の光に対し
て可動ミラーの移動を高精度に行なうことが困難で、回
折格子、プリズムを用いる分光器に比して、波長精度、
分解能の点で劣り、実用に適さないという問題があった
。In this way, in conventional Fourier transform spectrometers, the movable mirror is moved by mechanical means to change the optical path length, so the movable mirror can be moved with high precision for light with a short wavelength of about 1 μm. wavelength accuracy, compared to spectrometers that use diffraction gratings and prisms.
The problem was that it had poor resolution and was not suitable for practical use.
本考案はこのような問題点を解決するためのもので、１
μ肌程度の波長をもった光の分光に適用できるフーリエ
変換型分光路を提供することを目的としたものである。The purpose of this invention is to solve these problems.
The purpose of this invention is to provide a Fourier transform type spectral path that can be applied to the spectroscopy of light having a wavelength comparable to μ skin.
以下、第２図及び第３図に関連して本考案の実施例を説
明する。Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.
第２図において、光源１、ハーフミラ−２、固定ミラー
３、検知器５は第１図に示す従来のものと同様であるが
、ミラー４′は固定されている。In FIG. 2, a light source 1, a half mirror 2, a fixed mirror 3, and a detector 5 are the same as the conventional one shown in FIG. 1, but the mirror 4' is fixed.
６は固定ミラー４′とハーフミラ−２との間に設けられ
た、石英等の材料よりなるガスセルで、該ガスセル６内
には、ニードルバルブ７を介シて炭酸ガス、チッソガス
等の気体を封入できるようになっている。Reference numeral 6 denotes a gas cell made of a material such as quartz, which is provided between the fixed mirror 4' and the half mirror 2. Gas such as carbon dioxide gas or nitrogen gas is sealed in the gas cell 6 via a needle valve 7. It is now possible to do so.
８は圧力計である。ガスセル６内の気体の屈折率は圧力
の増加に伴ない増加するが、これはガスセル６の光学長
が圧力の増加に伴ない長（なることを意味している。8 is a pressure gauge. The refractive index of the gas in the gas cell 6 increases as the pressure increases, which means that the optical length of the gas cell 6 increases as the pressure increases.
したがってガスセル６内の圧力を上げることによつてガ
スセル６内の光学長を変化させることができる。Therefore, by increasing the pressure within the gas cell 6, the optical length within the gas cell 6 can be changed.
すなわちガスセル６内の気体の圧力を圧力計８によって
モニターし、光学長に換算することができる。That is, the pressure of the gas in the gas cell 6 can be monitored by the pressure gauge 8 and converted into an optical length.
このガス圧力と光学長変化に関する実験結果を表わすグ
ラフを第３図に示す。A graph showing the experimental results regarding the gas pressure and optical length change is shown in FIG.
本実験は、ガスセル長１．０ｃｍ、光源波長０．６８μ
肌について行ったもので、線ＡはＫｒ （クリプトン）
、線ＢはＡｒ（アルゴン）線ＣはＮｅ （ネオン）を封
入ガスとした場合の測定値をそれぞれ示している。In this experiment, the gas cell length was 1.0 cm, and the light source wavelength was 0.68μ.
Line A is Kr (krypton) for the skin.
, line B shows the measured values when Ar (argon) is used, and line C shows the measured values when Ne (neon) is used as the filler gas.
本図に明らかなように、ガスセル内のガス圧を１０−２
〜］Ｔｏｒｒ程度まで変化させることにより、光学長は
１０−１〜３０Ａ程度まで変化する。As is clear from this figure, the gas pressure inside the gas cell is 10-2
~ ] By changing the optical length to about Torr, the optical length changes from about 10-1 to about 30A.
この場合の圧力領域は、ニードルバルブ、圧力計を用い
て精度良＜容易にコントロールすることが可能で、０．
１Ａの分解能を可視近赤外領域で得ることができる。In this case, the pressure range can be easily controlled with good accuracy using a needle valve and a pressure gauge, and can be controlled at 0.
A resolution of 1A can be obtained in the visible and near-infrared region.
以上、説明したように本考案によると光路差の変化に機
械的手段を用いることなく、ガスセル内の気体の圧力を
変化させることによって光学長を変化させるようにして
いるため、微小の光学長を精度よく変化でき、可視光領
域のフーリエ変換分光に威力を発揮することができる。As explained above, according to the present invention, the optical length is changed by changing the pressure of the gas in the gas cell without using mechanical means to change the optical path difference. It can be changed with high precision and is effective for Fourier transform spectroscopy in the visible light region.
第１図は従来のフーリエ変換型分光器の説明図、第２図
は本考案に係るフーリエ変換型分光器の実施例の説明図
、第３図は同ガスセル内のガス圧力と光学長の変化との
関係を示すグラフである。
図中、１は光源、２はハーフミラ−１３，４′は固定ミ
ラー、５は検知器、６はガスセル、７はニードルバルブ
、８は圧力計である。Figure 1 is an explanatory diagram of a conventional Fourier transform spectrometer, Figure 2 is an explanatory diagram of an embodiment of the Fourier transform spectrometer according to the present invention, and Figure 3 is a diagram showing changes in gas pressure and optical length within the gas cell. It is a graph showing the relationship between In the figure, 1 is a light source, 2 is a half mirror 13, 4' is a fixed mirror, 5 is a detector, 6 is a gas cell, 7 is a needle valve, and 8 is a pressure gauge.
Claims (1)
記ハーフミラ−で反射させて検知器に送るとともに、前
記ハーフミラ−で反射した光源の方を他方のミラーで反
射させ前記ハーフミラ−を通して検知器に送り、前記二
つの光に光路差を与えてフーリエ変換分光を行なう分光
器において、前記一方のミラーおよび他方のミラーをい
ずれも固定ミラーとし、そのいずれか一方の固定ミラー
と前記ハーフミラ−との間に気体を封入するガスセルを
設け、前記ガスセル内の気体の圧力を変化させて前記光
路差を変化させるようにしたことを特徴とするフーリエ
変換型分光器。The light from the light source that has passed through the half mirror is reflected by one mirror and the half mirror and sent to the detector, and the light source reflected by the half mirror is reflected by the other mirror and sent to the detector through the half mirror. , in a spectrometer that performs Fourier transform spectroscopy by giving an optical path difference to the two lights, both of the one mirror and the other mirror are fixed mirrors, and there is a space between one of the fixed mirrors and the half mirror. 1. A Fourier transform spectrometer, characterized in that a gas cell for sealing gas is provided, and the optical path difference is changed by changing the pressure of the gas in the gas cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8466176U JPS606744Y2 (en) | 1976-06-29 | 1976-06-29 | Fourier transform spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8466176U JPS606744Y2 (en) | 1976-06-29 | 1976-06-29 | Fourier transform spectrometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS533533U JPS533533U (en) | 1978-01-13 |
| JPS606744Y2 true JPS606744Y2 (en) | 1985-03-05 |
Family
ID=28695903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8466176U Expired JPS606744Y2 (en) | 1976-06-29 | 1976-06-29 | Fourier transform spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS606744Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60125226U (en) * | 1984-02-03 | 1985-08-23 | 富士機工株式会社 | Seat slide locking device |
| JPH0524581Y2 (en) * | 1987-04-23 | 1993-06-22 |
-
1976
- 1976-06-29 JP JP8466176U patent/JPS606744Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS533533U (en) | 1978-01-13 |
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