JPH0656759U - CARS laser measuring device - Google Patents
CARS laser measuring deviceInfo
- Publication number
- JPH0656759U JPH0656759U JP374693U JP374693U JPH0656759U JP H0656759 U JPH0656759 U JP H0656759U JP 374693 U JP374693 U JP 374693U JP 374693 U JP374693 U JP 374693U JP H0656759 U JPH0656759 U JP H0656759U
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- light
- laser
- measurement field
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- measurement
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- Lasers (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
(57)【要約】
【目的】 測定開始時並びに測定点移動時における光学
的な調整を簡便に行えるようにする。
【構成】 計測場４の一方の側に、励起光としてのレー
ザ光９と誘導光としてのレーザ光１０を出射するレーザ
出射装置３を配設し、計測場４の他方の側に、両レーザ
光９，１０を計測場４内に位相整合条件を満たすように
入射せしめる反射鏡１２を設けると共に、計測場４の一
方の側、即ちレーザ出射装置３を配設した側に、計測場
４内から放射される反ストークス光に相当する差周波１
１のみを透過させ且つ差周波１１以外の光を除去するた
めのフィルタ１３と、フィルタ１３を透過した差周波１
１を集光せしめるレンズ１４と、レンズ１４で集光され
た差周波１１を受光する受光装置７とを、レーザ出射装
置３と一体化し一つのユニット１５として配設する。
(57) [Summary] [Purpose] To facilitate optical adjustments at the start of measurement and when moving the measurement point. A laser emitting device 3 for emitting a laser beam 9 as excitation light and a laser beam 10 as guide light is arranged on one side of the measurement field 4, and both lasers are provided on the other side of the measurement field 4. Inside the measurement field 4 is provided a reflecting mirror 12 for making the light 9 and 10 incident on the measurement field 4 so as to satisfy the phase matching condition, and at one side of the measurement field 4, that is, on the side where the laser emitting device 3 is disposed. Difference frequency 1 corresponding to anti-Stokes light emitted from
Filter 13 for transmitting only 1 and removing light other than difference frequency 11 and difference frequency 1 transmitted through filter 13
A lens 14 for condensing 1 and a light receiving device 7 for receiving the difference frequency 11 condensed by the lens 14 are integrated with the laser emitting device 3 and arranged as one unit 15.
Description
【０００１】[0001]
本考案は、燃焼場等における温度計測やガス組成計測に用いられるＣＡＲＳレ ーザ計測装置に関するものである。 The present invention relates to a CARS laser measuring device used for measuring temperature and gas composition in a combustion field or the like.
【０００２】[0002]
従来、ＣＡＲＳ（Ｃｏｈｅｒｅｎｔ Ａｎｔｉ−Ｓｔｏｋｅｓ Ｒａｍａｎ Ｓｃａｔｔｅｒｉｎｇ）法、即ちコヒーレント反ストークスラマン散乱法を利用 したレーザ計測装置は、図３に示されるように、励起光としての波長ω1のレー ザ光９を出射するＹＡＧレーザ発振器１と、ストークス光に相当する誘導光とし ての波長ω2のレーザ光１０を出射する色素レーザ発振器２とからなるレーザ出 射装置３を、燃焼場等の計測場４の一方の側に配設し、前記レーザ出射装置３と 計測場４との間に、前記両レーザ光９，１０を計測場４内に位相整合条件を満た すように入射せしめる集光レンズ５を設けると共に、前記計測場４の他方の側に 、前記計測場４内から放射される反ストークス光に相当する波長ω3の差周波１ １を集光せしめるレンズ６と、該レンズ６で集光された差周波１１を受光する受 光装置７とを配設してなる構成を有している。Conventionally, a laser measurement apparatus utilizing a CARS (Coherent Anti-Stokes Raman Scattering) method, that is, a coherent anti-Stokes Raman scattering method emits a laser beam 9 having a wavelength ω 1 as excitation light, as shown in FIG. A laser emitting device 3 including a YAG laser oscillator 1 and a dye laser oscillator 2 that emits a laser beam 10 having a wavelength ω 2 as a guide light corresponding to Stokes light is connected to a measurement field 4 such as a combustion field. A condenser lens 5 is provided between the laser emission device 3 and the measurement field 4 to allow the laser beams 9 and 10 to enter the measurement field 4 so as to satisfy the phase matching condition. with the other side of the measuring field 4, wherein the measuring field wavelength omega 3 difference frequency 1 1 a lens allowed to condensing corresponding to anti-Stokes light emitted from the inside 4 If has a structure obtained by arranging the light receiving device 7 for receiving the difference frequency 11 condensed by the lens 6.
【０００３】 尚、図中、８は差周波１１以外の光を除去するためのフィルタである。In the figure, 8 is a filter for removing light other than the difference frequency 11.
【０００４】 前記ＣＡＲＳレーザ計測装置においては、レーザ出射装置３のＹＡＧレーザ発 振器１から励起光としての波長ω1のレーザ光９を出射すると共に、色素レーザ 発振器２からストークス光に相当する誘導光としての波長ω2のレーザ光１０を 出射し、前記両レーザ光９，１０を集光レンズ５により計測場４内に位相整合条 件を満たすように入射せしめると、計測場４内から反ストークス光に相当する波 長ω3（＝２ω1−ω2）の差周波１１が放射され、該差周波１１がレンズ６によ って集光され且つフィルタ８によって差周波１１以外の光が除去された後、受光 装置７によって受光され、そのデータを解析することにより、計測場４における 温度やガス組成が計測される。In the CARS laser measurement device, the YAG laser oscillator 1 of the laser emission device 3 emits the laser light 9 having the wavelength ω 1 as the excitation light, and the dye laser oscillator 2 induces the light equivalent to the Stokes light. When a laser beam 10 having a wavelength ω 2 as light is emitted and both of the laser beams 9 and 10 are made to enter the measurement field 4 by the condensing lens 5 so as to satisfy the phase matching condition, the light is reflected from the measurement field 4. A difference frequency 11 having a wavelength ω 3 (= 2ω 1 −ω 2 ) corresponding to the Stokes light is radiated, the difference frequency 11 is condensed by the lens 6, and light other than the difference frequency 11 is collected by the filter 8. After being removed, the light is received by the light receiving device 7, and the temperature and gas composition in the measurement field 4 are measured by analyzing the data.
【０００５】[0005]
しかしながら、前述の如きＣＡＲＳレーザ計測装置では、レーザ出射装置３及 び集光レンズ５と、レンズ６及び受光装置７とが計測場４を挟んで反対側に位置 しているため、測定開始時には、前記レーザ出射装置３及び集光レンズ５と、レ ンズ６及び受光装置７とを夫々個別に位置合わせして光学的な調整を行う必要が あり、又、計測場４における測定点を例えば図３の紙面と直交する方向、即ち両 レーザ光９，１０を含む面に対し直交する方向に移動する場合にも、前記レーザ 出射装置３及び集光レンズ５と、レンズ６及び受光装置７とを夫々個別に位置合 わせして光学的な調整を行わなければならず、作業に手間がかかるという問題を 有していた。 However, in the CARS laser measuring device as described above, the laser emitting device 3, the condenser lens 5, and the lens 6 and the light receiving device 7 are located on the opposite sides of the measurement field 4, so that at the start of measurement, The laser emitting device 3 and the condenser lens 5, and the lens 6 and the light receiving device 7 need to be individually aligned for optical adjustment, and the measurement point in the measurement field 4 is, for example, as shown in FIG. When moving in a direction orthogonal to the plane of the drawing, that is, in a direction orthogonal to the plane containing both laser lights 9 and 10, the laser emitting device 3 and the condenser lens 5, the lens 6 and the light receiving device 7 are respectively respectively. There is a problem in that it takes time and effort to perform the optical adjustment by individually aligning the positions.
【０００６】 本考案は、斯かる実情に鑑み、測定開始時並びに測定点移動時における光学的 な調整を簡便に行い得るＣＡＲＳレーザ計測装置を提供しようとするものである 。In view of the above situation, the present invention aims to provide a CARS laser measuring device capable of easily performing optical adjustment at the time of starting measurement and moving the measurement point.
【０００７】[0007]
本考案は、計測場に対し励起光としてのレーザ光と誘導光としてのレーザ光を 出射するレーザ出射装置と、該レーザ出射装置に対し計測場を挟んで対向配置さ れ前記両レーザ光を計測場内に位相整合条件を満たすように入射せしめる反射鏡 と、前記計測場内から放射される差周波を集光せしめるレンズと、該レンズで集 光された差周波を受光する受光装置とを備え、前記レーザ出射装置、レンズ、受 光装置を一体化したことを特徴とするものである。 The present invention is directed to a laser emitting device that emits a laser beam as excitation light and a laser beam as guide light to a measurement field and a laser emitting device that is arranged opposite to the laser emission device with a measurement field interposed therebetween to measure both laser beams. A reflecting mirror that is incident on the field so as to satisfy a phase matching condition, a lens that focuses the difference frequency emitted from the measurement field, and a light receiving device that receives the difference frequency collected by the lens, The laser emitting device, the lens, and the light receiving device are integrated.
【０００８】[0008]
従って、レーザ出射装置から励起光としてのレーザ光を出射すると共に、誘導 光としてのレーザ光を出射し、前記両レーザ光を反射鏡により計測場内に位相整 合条件を満たすように入射せしめると、計測場内から反ストークス光に相当する 差周波が放射され、該差周波がレンズによって集光され、受光装置によって受光 され、そのデータを解析することにより、計測場における温度やガス組成が計測 される。 Therefore, when the laser beam is emitted from the laser emitting device as the excitation light, the laser beam is emitted as the guiding light, and both of the laser beams are incident on the measurement field by the reflecting mirror so as to satisfy the phase matching condition, A difference frequency corresponding to anti-Stokes light is radiated from the measurement field, the difference frequency is collected by a lens, received by a light receiving device, and the data is analyzed to measure the temperature and gas composition in the measurement field. .
【０００９】 ここで、レーザ出射装置とレンズと受光装置は一体化し一つのユニットとして あるため、測定開始時には、前記ユニットと反射鏡との位置合わせによる光学的 な調整のみを行えばよく、レーザ出射装置とレンズ及び受光装置とを夫々個別に 位置合わせして光学的な調整を行う必要はなくなり、又、計測場における測定点 を例えば両レーザ光を含む面に対し直交する方向に移動する場合には、反射鏡の 位置はそのままで、前記ユニットのみを動かすだけで済み、測定開始時と同様、 レーザ出射装置とレンズ及び受光装置とを夫々個別に位置合わせして光学的な調 整を行う必要はなくなり、作業がきわめて容易に行えるようになる。Here, since the laser emitting device, the lens and the light receiving device are integrated into one unit, only optical adjustment by alignment of the unit and the reflecting mirror needs to be performed at the start of measurement. It is no longer necessary to position the device and the lens and the light receiving device individually to perform optical adjustment, and when the measurement point in the measurement field is moved, for example, in the direction orthogonal to the plane containing both laser beams. Requires only moving the unit without changing the position of the reflecting mirror.As with the start of measurement, it is necessary to position the laser emitting device, lens and light receiving device individually to perform optical adjustment. Will be eliminated and the work will be much easier.
【００１０】[0010]
以下、図面に基づいて本考案の実施例を説明する。 An embodiment of the present invention will be described below with reference to the drawings.
【００１１】 図１及び図２は本考案の一実施例であり、燃焼場等の計測場４の一方の側に、 励起光としての波長ω1のレーザ光９を出射するＹＡＧレーザ発振器１と、スト ークス光に相当する誘導光としての波長ω2のレーザ光１０を出射する色素レー ザ発振器２とからなるレーザ出射装置３を配設し、前記計測場４の他方の側に、 前記両レーザ光９，１０を計測場４内に位相整合条件を満たすように入射せしめ る凹面鏡等の反射鏡１２を設けると共に、前記計測場４の一方の側、即ち前記レ ーザ出射装置３を配設した側に、前記計測場４内から放射される反ストークス光 に相当する波長ω3の差周波１１のみを透過させ且つ該差周波１１以外の光を除 去するためのフィルタ１３と、該フィルタ１３を透過した前記差周波１１を集光 せしめるレンズ１４と、該レンズ１４で集光された差周波１１を受光する受光装 置７とを、前記レーザ出射装置３と一体化し一つのユニット１５として配設する 。FIGS. 1 and 2 show an embodiment of the present invention. A YAG laser oscillator 1 for emitting a laser beam 9 having a wavelength ω 1 as excitation light is provided on one side of a measurement field 4 such as a combustion field. , A dye laser oscillator 2 which emits a laser beam 10 having a wavelength ω 2 as a guide light corresponding to the Storks light is provided, and the laser emitting device 3 is provided on the other side of the measurement field 4 and A reflecting mirror 12, such as a concave mirror, which makes the laser beams 9 and 10 incident on the measurement field 4 so as to satisfy the phase matching condition, is provided, and one side of the measurement field 4, that is, the laser emitting device 3 is arranged. On the installed side, a filter 13 for transmitting only the difference frequency 11 having a wavelength ω 3 corresponding to the anti-Stokes light emitted from the measurement field 4 and removing light other than the difference frequency 11, The difference frequency 11 transmitted through the filter 13 is collected. The lens 14 and the light receiving device 7 for receiving the difference frequency 11 condensed by the lens 14 are integrated with the laser emitting device 3 and arranged as one unit 15.
【００１２】 前述の如く構成したので、レーザ出射装置３のＹＡＧレーザ発振器１から励起 光としての波長ω1のレーザ光９を出射すると共に、色素レーザ発振器２からス トークス光に相当する誘導光としての波長ω2のレーザ光１０を出射し、前記両 レーザ光９，１０を反射鏡１２により計測場４内に位相整合条件を満たすように 入射せしめると、計測場４内から反ストークス光に相当する波長ω3（＝２ω1− ω2）の差周波１１が放射され、該差周波１１がフィルタ１３によって差周波１ １以外の光が除去され且つレンズ１４によって集光され、受光装置７によって受 光され、そのデータを解析することにより、計測場４における温度やガス組成が 計測される。With the above-described structure, the YAG laser oscillator 1 of the laser emitting device 3 emits the laser light 9 having the wavelength ω 1 as the excitation light, and the dye laser oscillator 2 emits the laser light 9 as the guide light corresponding to the Stokes light. When a laser beam 10 having a wavelength of ω 2 is emitted and both of the laser beams 9 and 10 are made incident on the measurement field 4 by the reflecting mirror 12 so as to satisfy the phase matching condition, it corresponds to anti-Stokes light from the measurement field 4. The difference frequency 11 of the wavelength ω 3 (= 2ω 1 −ω 2 ) is emitted, the difference frequency 11 is filtered by the filter 13 to remove the light other than the difference frequency 11 and is condensed by the lens 14, and the light receiving device 7 By receiving the light and analyzing the data, the temperature and gas composition in the measurement field 4 are measured.
【００１３】 ここで、レーザ出射装置３とフィルタ１３とレンズ１４と受光装置７は一体化 し一つのユニット１５としてあるため、測定開始時には、前記ユニット１５と反 射鏡１２との位置合わせによる光学的な調整のみを行えばよく、レーザ出射装置 ３とレンズ１４及び受光装置７とを夫々個別に位置合わせして光学的な調整を行 う必要はなくなり、又、計測場４における測定点を例えば図２の紙面と直交する 方向、即ち両レーザ光９，１０を含む面に対し直交する方向に移動する場合には 、反射鏡１２の位置はそのままで、前記ユニット１５のみを動かすだけで済み、 測定開始時と同様、レーザ出射装置３とレンズ１４及び受光装置７とを夫々個別 に位置合わせして光学的な調整を行う必要はなくなり、作業がきわめて容易に行 えるようになる。Here, since the laser emitting device 3, the filter 13, the lens 14, and the light receiving device 7 are integrated into one unit 15, at the start of measurement, the optical alignment by the unit 15 and the reflection mirror 12 is performed. It is not necessary to position the laser emitting device 3, the lens 14 and the light receiving device 7 individually to perform optical adjustment, and to adjust the measurement point in the measurement field 4 to, for example, When moving in the direction orthogonal to the paper surface of FIG. 2, that is, in the direction orthogonal to the plane containing both laser beams 9 and 10, the position of the reflecting mirror 12 remains the same and only the unit 15 is moved. As with the start of the measurement, there is no need to individually align the laser emitting device 3, the lens 14 and the light receiving device 7 to perform optical adjustment, and the work is extremely easy. Become so.
【００１４】 こうして、従来のＣＡＲＳレーザ計測装置に比べ、測定開始時並びに測定点移 動時における光学的な調整を簡便に行うことが可能となる。In this way, it becomes possible to easily perform optical adjustments at the start of measurement and at the time of moving the measurement point, as compared with the conventional CARS laser measuring device.
【００１５】 尚、本考案のＣＡＲＳレーザ計測装置は、上述の実施例にのみ限定されるもの ではなく、反射鏡として凹面鏡を使用する代りに二枚のフラットな鏡を使用して もよいこと、フィルタは必ずしも設けなくてもよいこと等、その他、本考案の要 旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。The CARS laser measuring device of the present invention is not limited to the above-mentioned embodiment, and two flat mirrors may be used instead of the concave mirror as the reflecting mirror. Needless to say, the filter may not necessarily be provided and other various changes can be made without departing from the scope of the invention.
【００１６】[0016]
以上説明したように、本考案のＣＡＲＳレーザ計測装置によれば、測定開始時 並びに測定点移動時における光学的な調整を簡便に行い得るという優れた効果を 奏し得る。 As described above, according to the CARS laser measuring device of the present invention, the excellent effect that the optical adjustment can be easily performed at the time of starting the measurement and moving the measurement point can be achieved.
【図１】本考案の一実施例の斜視図である。FIG. 1 is a perspective view of an embodiment of the present invention.
【図２】本考案の一実施例の側面図である。FIG. 2 is a side view of an embodiment of the present invention.
【図３】従来例の側面図である。FIG. 3 is a side view of a conventional example.
３ レーザ出射装置 ４ 計測場 ７ 受光装置 ９ レーザ光 １０ レーザ光 １１ 差周波 １２ 反射鏡 １４ レンズ １５ ユニット 3 Laser emitting device 4 Measurement field 7 Light receiving device 9 Laser light 10 Laser light 11 Difference frequency 12 Reflecting mirror 14 Lens 15 unit
Claims (1)
誘導光としてのレーザ光を出射するレーザ出射装置と、
該レーザ出射装置に対し計測場を挟んで対向配置され前
記両レーザ光を計測場内に位相整合条件を満たすように
入射せしめる反射鏡と、前記計測場内から放射される差
周波を集光せしめるレンズと、該レンズで集光された差
周波を受光する受光装置とを備え、前記レーザ出射装
置、レンズ、受光装置を一体化したことを特徴とするＣ
ＡＲＳレーザ計測装置。1. A laser emitting device for emitting laser light as excitation light and laser light as guide light to a measurement field,
A reflecting mirror that is arranged to face the laser emitting device with a measurement field interposed therebetween and that makes both of the laser beams incident on the measurement field so as to satisfy a phase matching condition; and a lens that collects a difference frequency emitted from the measurement field. A light receiving device for receiving the difference frequency focused by the lens, wherein the laser emitting device, the lens, and the light receiving device are integrated.
ARS laser measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP374693U JPH0656759U (en) | 1993-01-14 | 1993-01-14 | CARS laser measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP374693U JPH0656759U (en) | 1993-01-14 | 1993-01-14 | CARS laser measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0656759U true JPH0656759U (en) | 1994-08-05 |
Family
ID=11565769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP374693U Pending JPH0656759U (en) | 1993-01-14 | 1993-01-14 | CARS laser measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0656759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009515079A (en) * | 2005-11-04 | 2009-04-09 | ゾロ テクノロジーズ，インコーポレイティド | Method and apparatus for spectroscopic measurements in a combustor of a gas turbine engine |
-
1993
- 1993-01-14 JP JP374693U patent/JPH0656759U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009515079A (en) * | 2005-11-04 | 2009-04-09 | ゾロ テクノロジーズ，インコーポレイティド | Method and apparatus for spectroscopic measurements in a combustor of a gas turbine engine |
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