JPH06201467A - Spectral light amount varying device - Google Patents

Spectral light amount varying device

Info

Publication number
JPH06201467A
JPH06201467A JP231393A JP231393A JPH06201467A JP H06201467 A JPH06201467 A JP H06201467A JP 231393 A JP231393 A JP 231393A JP 231393 A JP231393 A JP 231393A JP H06201467 A JPH06201467 A JP H06201467A
Authority
JP
Japan
Prior art keywords
light
light amount
beam splitter
disks
control
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.)
Pending
Application number
JP231393A
Other languages
Japanese (ja)
Inventor
Yuichi Komazaki
雄一 駒崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Priority to JP231393A priority Critical patent/JPH06201467A/en
Publication of JPH06201467A publication Critical patent/JPH06201467A/en
Pending legal-status Critical Current

Links

Landscapes

  • Spectrometry And Color Measurement (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE:To control a light amount in a spectral light amount varying device without using voltage of a light source lamp or an ND filter or the like. CONSTITUTION:Irregular shaped cuts 16, 16a which are reverse to each other are formed on two disks 14, 14a between an optical chopper 2 and a beam splitter 5, wherein a space 17 formed at an intersection of the cuts 16, 16a is used to control a light amount. In addition, light split by the beam splitter 5 is measured by a detector 8, and a number of rotations of a motor 18 (disks 14, 14a) is calculated and controlled based on the measured value by a CPU 9, thereby feedback-controlling the light amount.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、各種の光を用いて観察
或いは試験等を行う分光光量可変装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectroscopic light quantity varying device for observing or testing using various kinds of light.

【0002】[0002]

【従来の技術】従来の分光光量可変装置において、光量
を自動的に制御する装置としては、図4に示す例の様
に、光学系の一部にハーフミラー等のビームスプリッタ
ー5を組込み、一定比率で分割された光量を検出器8で
計測し、CPU(制御器)9を介して光量情報をランプ
電源10にフィードバックし、電圧あるいは電流を制御す
るシステムと、図5に示す様に、CPU9を介した光量
情報を、NDフィルター11(或いは可変スリット、絞り
器)にフィードバックして制御するシステムが公知であ
る。
2. Description of the Related Art As a conventional device for automatically controlling the amount of light in a variable spectral light amount device, as shown in FIG. 4, a beam splitter 5 such as a half mirror is incorporated in a part of an optical system and fixed. A system for measuring the light amount divided by the ratio with a detector 8 and feeding back the light amount information to a lamp power source 10 via a CPU (controller) 9 to control a voltage or a current, and a CPU 9 as shown in FIG. A system is known in which the light amount information via the is fed back to the ND filter 11 (or a variable slit, a diaphragm) and controlled.

【0003】図中1は光源、2はオプチカルチョッパ
ー、3はモノクロメータ、4はコリメータ、6は試料、
7は試料透過光測定用検出器である。
In the figure, 1 is a light source, 2 is an optical chopper, 3 is a monochromator, 4 is a collimator, 6 is a sample,
Reference numeral 7 is a detector for measuring the transmitted light of the sample.

【0004】[0004]

【発明が解決しようとする課題】しかし、上記従来例に
おいては、次のような欠点がある。a.光源ランプ1の
電力(電圧、電流)負荷を制御する方式では、電力負荷
の変化と伴にランプ、フィラメントの温度も変動し、ラ
ンプより放射された波長の分布(スペクトル)が変化し
てしまう。又、ハロゲンランプの様なものを光源に用い
た場合には温度変化によりハロゲンサイクルがみだれる
為に、安定した光源を得ることができなくなる。更に、
制御レスポンスが非常に遅い。b.NDフィルター11の
様なフィルターを用いて制御する場合には、制御領域が
制限されると共に、ほこり等によるフィルターのよごれ
の影響を大きく受ける。
However, the above conventional example has the following drawbacks. a. In the method of controlling the power (voltage, current) load of the light source lamp 1, the temperature of the lamp and the filament also fluctuates as the power load changes, and the distribution (spectrum) of the wavelength radiated from the lamp changes. Further, when a light source such as a halogen lamp is used, a halogen light cycle is generated due to a temperature change, so that a stable light source cannot be obtained. Furthermore,
Control response is very slow. b. When control is performed using a filter such as the ND filter 11, the control area is limited and the filter is greatly affected by dust and the like.

【0005】本発明の目的は、上記a〜bに記した欠点
を解消した分光光量可変装置を提供することである。
An object of the present invention is to provide a spectroscopic light quantity varying device which eliminates the above-mentioned drawbacks a to b.

【0006】[0006]

【課題を解決するための手段】本発明に係る分光光量可
変装置の構成は次のとおりである。
The structure of the spectral light quantity varying device according to the present invention is as follows.

【0007】2枚の円盤において、同心円線上に徐々に
小さくなる雲形の切り抜きを形成し、この切り抜きが反
対方向を向くように重ね合わせて2枚の円盤を回転自在
に軸支すると共に2枚の円盤をモータにより同一方向に
回転させて前記切り抜きの交点に形成される空間の大き
さを変更することにより、光量を制御できるように構成
した光量可変器をオプチカルチョッパーとビームスプリ
ッター間に配置し、ビームスプリッターで分割された光
を光源制御用検出器で計測し、この計測値を基に前記2
枚の円盤の回転量を演算してモータに信号を送り、この
信号に基づいて2枚の円盤を回転させて光量をフィード
バック制御する制御器を設けて成る分光光量可変装置。
In the two discs, gradually decreasing cloud-shaped cutouts are formed on concentric circle lines, and the two discs are rotatably rotatably supported and superposed so that the cutouts face in opposite directions. By rotating the disk in the same direction by a motor to change the size of the space formed at the intersection of the cutouts, a light quantity variable device configured to control the light quantity is arranged between the optical chopper and the beam splitter, The light split by the beam splitter is measured by the light source control detector, and based on this measurement value,
A spectroscopic light quantity varying device comprising a controller for calculating the rotation amount of one disk and sending a signal to a motor, and rotating the two disks based on this signal to feedback control the light quantity.

【0008】[0008]

【作用】光源から放射された光はオプチカルチョッパー
を経由して光量可変器に入る。この光量可変器は、2枚
の円盤に形成した雲形切り抜きの交点に形成される空間
により光量を制御する。制御された光はビームスプリッ
ターを経由してモノクロメータ、コリメータ、試料に至
り、例えば検出器により透過光量が検出される。一方、
ビームスプリッターで分割された光は光源制御用検出器
で測定され、この値はCPU(制御器)に入力される。
制御器は検出器で計測された光量を基に、光量可変器に
信号を送り、モータを駆動して2枚の円盤を回転させて
雲形切り抜きで形成されている空間の大きさを制御して
光量をフィードバック制御する。
The light emitted from the light source enters the light quantity varying device via the optical chopper. This light quantity varying device controls the light quantity by the space formed at the intersection of the cloud-shaped cutouts formed on the two disks. The controlled light reaches the monochromator, the collimator, and the sample via the beam splitter, and the amount of transmitted light is detected by, for example, a detector. on the other hand,
The light split by the beam splitter is measured by the light source control detector, and this value is input to the CPU (controller).
The controller sends a signal to the light quantity variable device based on the light quantity measured by the detector, drives the motor and rotates the two disks to control the size of the space formed by the cloud cutout. The amount of light is feedback controlled.

【0009】[0009]

【実施例】図1に基づいて本発明の実施例を説明する。
1は光源、2はオプチカルチョッパー、12は光量可変器
にして、この光量可変器12の構成は図2に示されてい
る。但し、この光量可変器12の説明は後述する。3はモ
ノクロメータ、4はコリメータ、5はビームスプリッタ
ー、6は試料、7は試料透過光測定用検出器、8はビー
ムスプリッター5で分割された光を計測する検出器、9
はCPU(制御器)、10はランプ電源である。
Embodiments of the present invention will be described with reference to FIG.
Reference numeral 1 is a light source, 2 is an optical chopper, and 12 is a light amount variable device. The structure of the light amount variable device 12 is shown in FIG. However, the description of the light quantity varying device 12 will be described later. 3 is a monochromator, 4 is a collimator, 5 is a beam splitter, 6 is a sample, 7 is a detector for measuring sample transmitted light, 8 is a detector for measuring the light split by the beam splitter 5, 9
Is a CPU (controller), and 10 is a lamp power supply.

【0010】図2に示した光量可変器12は、枠体13に2
枚の円盤14、14aを軸15、15aで回転自在に軸支し、且
つこの2枚の円盤14、14aには同心円線上において徐々
に小さくなる雲形切り抜き16、16aを互いに反対方向に
形成し、この切り抜き16、16aの交点に光量制御用の空
間17を形成するように構成すると共にモータ18、駆動輪
19、ベルト20、回転輪21、21aにより回転軸15、15aを
回転させることにより、円盤14、14aが同一方向に回転
する構成である。
The light quantity variable device 12 shown in FIG.
A pair of discs 14 and 14a are rotatably supported by shafts 15 and 15a, and two discs 14 and 14a are formed with cloud cutouts 16 and 16a which are gradually reduced on concentric lines in opposite directions. A space 17 for controlling the amount of light is formed at the intersection of the cutouts 16 and 16a, and a motor 18 and a drive wheel are formed.
By rotating the rotary shafts 15 and 15a by the belt 19, the belt 20, and the rotary wheels 21 and 21a, the disks 14 and 14a rotate in the same direction.

【0011】光源から放射された光はオプチカルチョッ
パー2を経由して光量可変器12に入る。この光量可変器
12は、2枚の円盤14、14aに形成した雲形切り抜き16、
16aの交点に形成される空間17により光量を制御する。
制御された光はビームスプリッター5を経由してモノク
ロメータ3、コリメータ4、試料6に至り、検出器7に
より透過光量が検出される。一方、ビームスプリッター
5で分割された光は光源制御用検出器8で測定され、こ
の値はCPU(制御器)9に入力される。CPU9は検
出器8で計測された光量を基に、光量可変器12に信号を
送り、モータ18を駆動して2枚の円盤14、14aを回転さ
せて雲形切り抜き16、16aで形成される空間17の大きさ
を制御して光量をフィードバック制御する。
The light emitted from the light source enters the light quantity varying device 12 via the optical chopper 2. This light quantity variable device
12 is a cloud-shaped cutout 16 formed on two disks 14 and 14a,
The amount of light is controlled by the space 17 formed at the intersection of 16a.
The controlled light reaches the monochromator 3, collimator 4, and sample 6 via the beam splitter 5, and the amount of transmitted light is detected by the detector 7. On the other hand, the light split by the beam splitter 5 is measured by the light source control detector 8, and this value is input to the CPU (controller) 9. The CPU 9 sends a signal to the light quantity varying device 12 based on the light quantity measured by the detector 8 to drive the motor 18 to rotate the two disks 14 and 14a to form a space formed by the cloud-shaped cutouts 16 and 16a. The size of 17 is controlled to feedback-control the light amount.

【0012】[0012]

【発明の効果】【The invention's effect】

a.光源にかかる電力を制御しない為に、光源ランプの
温度変化による、ランプの放射スペクトル(波長分布と
強度)が一定である。 b.2枚の円盤により、光束の大きさを調節する為に、
制御レスポンスが非常に速い。 c.NDフィルターを使用しないことにより、光の制御
領域に制限がない。 d.本件の分光光量可変装置を用いることにより、図3
に示すように定エネルギー分光を簡単に行うことができ
る。例えば、Xeで特定のランプのスペクトルは図3の
とおりであり、この光源の波長域λ1 で連続的に定エネ
ルギー分光を行う為には光源の強さを強度3に設定すれ
ば良い。
a. Since the power applied to the light source is not controlled, the emission spectrum (wavelength distribution and intensity) of the lamp is constant due to the temperature change of the light source lamp. b. In order to adjust the size of the light flux with two disks,
Control response is very fast. c. By not using the ND filter, there is no limitation on the control area of light. d. By using the spectroscopic light amount variable device of the present case,
As shown in, constant energy spectroscopy can be easily performed. For example, the spectrum of a specific lamp with Xe is as shown in FIG. 3, and the intensity of the light source may be set to intensity 3 in order to continuously perform constant energy spectroscopy in the wavelength range λ 1 of this light source.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る分光光量可変装置の説明図。FIG. 1 is an explanatory diagram of a spectral light amount varying device according to the present invention.

【図2】光量可変器の説明図。FIG. 2 is an explanatory diagram of a light quantity variable device.

【図3】分光光量可変装置の制御例の説明図。FIG. 3 is an explanatory diagram of a control example of a spectral light amount varying device.

【図4】従来のランプ電力制御による自動光量制御シス
テムを採用した分光光量可変装置の説明図。
FIG. 4 is an explanatory diagram of a spectral light amount varying device that employs a conventional automatic light amount control system by controlling lamp power.

【図5】NDフィルター等による自動光量制御システム
を採用した分光光量可変装置の説明図。
FIG. 5 is an explanatory diagram of a spectral light amount varying device that employs an automatic light amount control system using an ND filter or the like.

【符号の説明】[Explanation of symbols]

1 光源 2 オプチカルチョッパー 3 モノクロメータ 4 コリメータ 5 ビームスプリッター 6 試料 7 検出器 8 検出器 9 CUP(制御器) 10 ランプ電源 12 光量可変器 13 枠体 14、14a 円盤 15、15a 軸 16、16a 雲形切り抜き 17 空間 18 モータ 19 駆動輪 20 ベルト 21、21a 回転輪 1 light source 2 optical chopper 3 monochromator 4 collimator 5 beam splitter 6 sample 7 detector 8 detector 9 CUP (controller) 10 lamp power supply 12 light quantity variable device 13 frame 14, 14a disk 15, 15a axis 16, 16a cloud clipping 17 Space 18 Motor 19 Drive Wheel 20 Belt 21, 21a Rotating Wheel

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 2枚の円盤において、同心円線上に徐々
に小さくなる雲形の切り抜きを形成し、この切り抜きが
反対方向を向くように重ね合わせて2枚の円盤を回転自
在に軸支すると共に2枚の円盤をモータにより同一方向
に回転させて前記切り抜きの交点に形成される空間の大
きさを変更することにより、光量を制御できるように構
成した光量可変器をオプチカルチョッパーとビームスプ
リッター間に配置し、ビームスプリッターで分割された
光を光源制御用検出器で計測し、この計測値を基に前記
2枚の円盤の回転量を演算してモータに信号を送り、こ
の信号に基づいて2枚の円盤を回転させて光量をフィー
ドバック制御する制御器を設けて成る分光光量可変装
置。
1. The two discs are formed with gradually decreasing cloud-shaped cutouts on concentric circles, and the two discs are rotatably supported while being stacked so that the cutouts face in opposite directions. A light quantity variable device configured to control the light quantity is arranged between the optical chopper and the beam splitter by rotating the disks in the same direction by a motor and changing the size of the space formed at the intersection of the cutouts. Then, the light split by the beam splitter is measured by the light source control detector, the rotation amount of the two disks is calculated based on this measurement value, and a signal is sent to the motor. A variable spectroscopic quantity device provided with a controller for feedback controlling the quantity of light by rotating the disc.
JP231393A 1993-01-11 1993-01-11 Spectral light amount varying device Pending JPH06201467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP231393A JPH06201467A (en) 1993-01-11 1993-01-11 Spectral light amount varying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP231393A JPH06201467A (en) 1993-01-11 1993-01-11 Spectral light amount varying device

Publications (1)

Publication Number Publication Date
JPH06201467A true JPH06201467A (en) 1994-07-19

Family

ID=11525856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP231393A Pending JPH06201467A (en) 1993-01-11 1993-01-11 Spectral light amount varying device

Country Status (1)

Country Link
JP (1) JPH06201467A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006025104A1 (en) * 2004-08-31 2006-03-09 Gl Sciences Incorporated Optical detection method and optical detector
US7369243B2 (en) 2003-05-28 2008-05-06 Fujifilm Corporation Optical measuring apparatus and optical measuring method
JP2008309805A (en) * 2008-09-26 2008-12-25 Fujifilm Corp Light measuring instrument and light measuring method
JP2010085305A (en) * 2008-10-01 2010-04-15 Ushio Inc Illumination light source apparatus
JP2016191647A (en) * 2015-03-31 2016-11-10 ブラザー工業株式会社 Inspection device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7369243B2 (en) 2003-05-28 2008-05-06 Fujifilm Corporation Optical measuring apparatus and optical measuring method
WO2006025104A1 (en) * 2004-08-31 2006-03-09 Gl Sciences Incorporated Optical detection method and optical detector
JPWO2006025104A1 (en) * 2004-08-31 2008-05-08 ジーエルサイエンス株式会社 Optical detection method and optical detector
JP4584254B2 (en) * 2004-08-31 2010-11-17 ジーエルサイエンス株式会社 Optical detection method and optical detector
JP2008309805A (en) * 2008-09-26 2008-12-25 Fujifilm Corp Light measuring instrument and light measuring method
JP2010085305A (en) * 2008-10-01 2010-04-15 Ushio Inc Illumination light source apparatus
JP2016191647A (en) * 2015-03-31 2016-11-10 ブラザー工業株式会社 Inspection device

Similar Documents

Publication Publication Date Title
US4505586A (en) Laser Raman spectrophotometry system and adjustment thereof
US3939348A (en) Infrared gas analysis
EP0590813A1 (en) Gas analyser
GB2419666A (en) Infrared gas analyzer
JPH06201467A (en) Spectral light amount varying device
JP2002156282A (en) Spectrophotometer
JP3446120B2 (en) Sample horizontal type goniometer photometer
CA1036833A (en) Infrared gas analysis
JPH08297088A (en) Spectrophotometer
CN209471047U (en) Transmittance etalon, transmittance measuring device
WO2015025600A1 (en) Photovoltaic cell absolute spectral sensitivity measurement device and method
JPH08285773A (en) Infrared gas analyzer
JPH10185686A (en) Spectrophotometer
JP2891780B2 (en) Energy beam irradiation angle setting method
JP2012088098A (en) Optical module and optical analysis device
US3058388A (en) Spectroscopic apparatus
JPS5813303Y2 (en) Bunko Koudokei
SU868375A1 (en) Method of measuring transmission coefficient of optical materials and reflection coefficients of mirrors
JP2560209B2 (en) Iso-light intensity spectral irradiation device
JPH0663846B2 (en) Optical pickup device
JPH03144323A (en) Measuring apparatus for laser wavelength
JPH08271417A (en) Apparatus for measuring deterioration of oil
JPS60111916A (en) Light source apparatus
JPS61149807A (en) Detecting device for position of light beam
JPS60254432A (en) Exposure device