JPH0248834U - - Google Patents
Info
- Publication number
- JPH0248834U JPH0248834U JP12744288U JP12744288U JPH0248834U JP H0248834 U JPH0248834 U JP H0248834U JP 12744288 U JP12744288 U JP 12744288U JP 12744288 U JP12744288 U JP 12744288U JP H0248834 U JPH0248834 U JP H0248834U
- Authority
- JP
- Japan
- Prior art keywords
- laser beam
- output
- photodetector
- optical means
- fabry
- 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
- 230000003287 optical effect Effects 0.000 claims description 7
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 5
- 238000010408 sweeping Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 2
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Description
第１図は本考案に係るレーザ周波数計の一実施
例を示す構成ブロツク図、第２図は第１図装置の
動作を示すタイムチヤート、第３図およひ第４図
は同動作説明図、第５図は本考案に係るレーザ周
波数計の第２の実施例の動作を示す為の説明図、
第６図は本考案に係るレーザ周波数計の第３の実
施例の動作を示す為の説明図、第７図および第８
図は従来のレーザ周波数計を示す原理図である。
１…参照レーザ、２…第１の光学手段、５…フ
アブリ・ペロー・エタロン、６…第２の光学手段
、７…第１の光検出器、８…第２の光検出器、９
…第１のメモリ回路、１０…第２のメモリ回路、
１１…発振器、１２…周波数演算回路、５３…掃
引手段。
Fig. 1 is a configuration block diagram showing an embodiment of the laser frequency meter according to the present invention, Fig. 2 is a time chart showing the operation of the device shown in Fig. 1, and Figs. 3 and 4 are explanatory diagrams of the same operation. , FIG. 5 is an explanatory diagram showing the operation of the second embodiment of the laser frequency meter according to the present invention,
FIG. 6 is an explanatory diagram showing the operation of the third embodiment of the laser frequency meter according to the present invention, and FIGS.
The figure is a principle diagram showing a conventional laser frequency meter. DESCRIPTION OF SYMBOLS 1... Reference laser, 2... First optical means, 5... Fabry-Perot etalon, 6... Second optical means, 7... First photodetector, 8... Second photodetector, 9
...first memory circuit, 10...second memory circuit,
DESCRIPTION OF SYMBOLS 11... Oscillator, 12... Frequency calculation circuit, 53... Sweeping means.
Claims (1)
ザ光と前期参照レーザの出力光とを合波する第１
の光学手段と、この第１の光学手段の出力光を入
射するフアブリ・ペロー・エタロンと、このフア
ブリ・ペロー・エタロンを透過する光を前記被測
定レーザ光と前記参照レーザ光の２つに分離する
第２の光学手段と、この第２の光学手段から出力
される前記被測定レーザ光を検出する第１の光検
出器と、前記第２の光学手段から出力される前記
参照レーザ光を検出する第２の光検出器と、前記
第１の光検出器の出力信号を記憶する第１のメモ
リ回路と、前記第２の光検出器の出力信号を記憶
する第２のメモリ回路と、前記フアブリ・ペロー
・エタロンのミラー間隔を微小変化させる掃引手
段と、この掃引手段を駆動する発振器と、この発
振器出力信号とこれに対応する第１のメモリ回路
出力および第２のメモリ回路出力に基づいて被測
定レーザ光の周波数を演算する周波数演算回路と
を備え、周波数演算回路において、フアブリ・ペ
ロー・エタロンの透過特性の曲線近似しこの近似
曲線から透過ピーク時の掃引手段入力信号値を演
算するように構成したことを特徴とするレーザ周
波数計。 A first step that combines a reference laser with a known oscillation frequency, a laser beam to be measured, and the output light of the previous reference laser.
an optical means, a Fabry-Perot etalon into which the output light of the first optical means is incident, and a light that passes through the Fabry-Perot etalon is separated into the laser beam to be measured and the reference laser beam. a second optical means for detecting the measured laser beam output from the second optical means; a first photodetector for detecting the reference laser beam output from the second optical means; a second photodetector that stores the output signal of the first photodetector; a second memory circuit that stores the output signal of the second photodetector; A sweeping means for minutely changing the mirror spacing of the Fabry-Perot etalon, an oscillator for driving the sweeping means, and an oscillator output signal based on the first memory circuit output and the second memory circuit output corresponding thereto. and a frequency calculation circuit for calculating the frequency of the laser beam to be measured, in which the frequency calculation circuit approximates a curve of the transmission characteristics of the Fabry-Perot etalon and calculates the sweep means input signal value at the transmission peak from this approximated curve. A laser frequency meter characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12744288U JPH0648366Y2 (en) | 1988-09-29 | 1988-09-29 | Laser frequency meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12744288U JPH0648366Y2 (en) | 1988-09-29 | 1988-09-29 | Laser frequency meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0248834U true JPH0248834U (en) | 1990-04-04 |
| JPH0648366Y2 JPH0648366Y2 (en) | 1994-12-12 |
Family
ID=31379880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12744288U Expired - Lifetime JPH0648366Y2 (en) | 1988-09-29 | 1988-09-29 | Laser frequency meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648366Y2 (en) |
-
1988
- 1988-09-29 JP JP12744288U patent/JPH0648366Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0648366Y2 (en) | 1994-12-12 |
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