JPH0480337B2 - - Google Patents
Info
- Publication number
- JPH0480337B2 JPH0480337B2 JP59225537A JP22553784A JPH0480337B2 JP H0480337 B2 JPH0480337 B2 JP H0480337B2 JP 59225537 A JP59225537 A JP 59225537A JP 22553784 A JP22553784 A JP 22553784A JP H0480337 B2 JPH0480337 B2 JP H0480337B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical axis
- receiving section
- light receiving
- projector
- 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 - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims description 29
- 230000004907 flux Effects 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000002834 transmittance Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
- G01N21/538—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke for determining atmospheric attenuation and visibility
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、光透過率測定装置において投光器よ
り投光した光束を受光器の適正な部分に位置合わ
せをするための手段に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a means for aligning a light beam projected from a light projector to an appropriate portion of a light receiver in a light transmittance measuring device.
第２図ａ，ｂはそれぞれ従来の光透過率測定装
置における光束１と受光部２の相対位置関係を示
したものであるが、投光器より投光した光束を受
光器の受光部２に位置合わせする際、光束１はビ
ーム径が絞られていないため、受光部２より大き
く、光軸調整完了時には光束１内に受光部２が入
るような状態となつている。
Figures 2a and b respectively show the relative positional relationship between the light beam 1 and the light receiving part 2 in a conventional light transmittance measuring device. At this time, since the beam diameter of the light beam 1 is not narrowed down, it is larger than the light receiving section 2, and the light receiving section 2 is in a state in which the light receiving section 2 enters the light beam 1 when the optical axis adjustment is completed.
このため、第２図ａのように光束１と受光部２
が内接する位置に光軸調整がなされてしまつた場
合、わずかな振動により両者の位置関係がずれて
しまい、第２図ｂに示すように光束１から受光部
２がはみ出した状態になつた場合には、受光量が
減少し、この光量の減少が測定個所の透過率の変
化として読取られてしまう問題があつた。しか
も、このずれを検出して補正する手段が特になか
つた。 Therefore, as shown in Fig. 2a, the light beam 1 and the light receiving part 2
If the optical axis is adjusted to a position where is inscribed, the positional relationship between the two will shift due to slight vibration, and the light receiving part 2 will protrude from the light beam 1 as shown in Figure 2b. However, there was a problem in that the amount of light received decreased and this decrease in the amount of light was read as a change in transmittance at the measurement location. Moreover, there was no particular means for detecting and correcting this deviation.
そこで、前記問題を解決するために、第３図及
び第４図に示す如く受光器３の筐体４内部に昇降
可能なＬ型反射板５と反射光束を監視する監視窓
６を設けることにより、受光器３に入る投光光束
の位置関係を筐体４の外部から容易に知り、光軸
を調整できるようにしたものが考えられた。第３
図及び４図は従来例の断面図で、第３図は光透過
率測定時の状態を、第４図は光軸調整時即ち較正
時の状態を示す。前記筐体４の上部には回転可能
な監視窓６が設けられている。該監視窓６の下部
にはカム状板７が固着されており、その端部は筐
体４に蝶番８で支えられているＬ型反射板５の端
部と接している。 Therefore, in order to solve the above problem, as shown in FIGS. 3 and 4, an L-shaped reflector 5 that can be raised and lowered and a monitoring window 6 for monitoring the reflected light flux are provided inside the casing 4 of the light receiver 3. , it has been considered that the positional relationship of the projected light flux entering the light receiver 3 can be easily known from outside the housing 4, and the optical axis can be adjusted. Third
3 and 4 are cross-sectional views of the conventional example, FIG. 3 shows the state at the time of light transmittance measurement, and FIG. 4 shows the state at the time of optical axis adjustment, that is, calibration. A rotatable monitoring window 6 is provided at the top of the housing 4. A cam-shaped plate 7 is fixed to the lower part of the monitoring window 6, and its end is in contact with the end of an L-shaped reflector 5 supported by a hinge 8 on the housing 4.
従つて、光軸調整時には監視窓６を回すことに
よりカム状板７を回転し、この回転により第４図
に示す如くＬ型反射板５は蝶番８を支点にして回
転し、一端が据付台９に接するまで下降する。こ
のとき、Ｌ型反射板５と据付台９の上面とが45度
の角度になる。ここで、予めＬ型反射板５の反射
面には光軸合わせマークが彫つてあり、監視窓６
を覗きながら投光器側に設けた光軸調整機構で投
光光束を前記光軸合わせマーク上で上下及び左右
に動かし、該光軸合わせマークが光束に一致する
ようにして光軸調整を行う。 Therefore, when adjusting the optical axis, the cam-shaped plate 7 is rotated by turning the monitoring window 6, and this rotation causes the L-shaped reflector 5 to rotate about the hinge 8 as shown in FIG. It descends until it touches 9. At this time, the L-shaped reflector 5 and the upper surface of the installation base 9 form an angle of 45 degrees. Here, an optical axis alignment mark is carved in advance on the reflective surface of the L-shaped reflector 5, and the monitoring window 6
The optical axis adjustment is performed by moving the emitted light beam vertically and horizontally on the optical axis alignment mark using an optical axis adjustment mechanism provided on the projector side while looking at the light beam so that the optical axis alignment mark coincides with the light beam.
しかしながらこのような従来例は、監視窓から
目視により光軸合わせを行うため、投光器からの
投光光束の波長範囲が可視領域にあり、Ｌ型反射
板に投影された光束を肉眼で見ることができる場
合は、光軸合わせができるが、投光光束の波長域
が紫外や赤外の光の場合には目視で光軸合わせが
できないと言う問題点がある。
However, in such conventional examples, the optical axis alignment is performed visually from the monitoring window, so the wavelength range of the light beam projected from the projector is in the visible range, and the light beam projected on the L-shaped reflector cannot be seen with the naked eye. If possible, the optical axes can be aligned, but there is a problem in that the optical axes cannot be aligned visually if the wavelength range of the projected light beam is in the ultraviolet or infrared range.
本発明は、前記問題点を解決するためになされ
たものであり、その目的は、投光器、からの投光
光束を受光素子で確認することにより目視によら
ず容易に光軸合わせができるようにすることにあ
る。 The present invention has been made to solve the above-mentioned problems, and its purpose is to make it possible to easily align the optical axis without visual inspection by checking the luminous flux emitted from the projector using a light receiving element. It's about doing.
この目的を達成するため、本発明は、透過率測
定個所の両側に投光器と受光器とを対向配置し、
前記投光器の光源から受光器の受光部へ投光しつ
つ、前記投光器と受光器の光軸を投光器側に設け
た光軸調整機構で光軸合わせする光透過率測定装
置における光軸合わせ方法において、前記投光器
にピンホールと絞りと投光レンズ系を設け、前記
受光器にはスリツトを備えたものである。
In order to achieve this objective, the present invention arranges a light projector and a light receiver facing each other on both sides of the transmittance measurement point,
In an optical axis alignment method in a light transmittance measuring device, the optical axes of the emitter and receiver are aligned using an optical axis adjustment mechanism provided on the emitter side while emitting light from a light source of the emitter to a light receiving part of a light receiver. , the light projector is provided with a pinhole, a diaphragm, and a light projecting lens system, and the light receiver is provided with a slit.
このような構成を有する本発明は、受光器の受
光部の有効面積をその前面に配置したスリツトに
よつて規制しておき、投光器の光源からの投光光
束をその中心部の光を含む所定の径にピンホール
により制限して投光レンズ系に導き、この投光レ
ンズ系から前記投光光束を受光した受光部の出力
を前記投光器側で監視しながら光軸調整機構で前
記ピンホールにより制限した投光光束の径内に前
記受光部の有効面積が入るように調整した後、前
記ピンホールにより制限された投光光束をその中
心部の光のみを通す絞りで更に前記受光部の有効
面積と略等しい径に制限して前記投光レンズ系に
導き、この投光レンズ系から前記投光光束を受光
した受光部の出力を前記投光器側で監視しながら
前記光軸調整機構で前記絞りにより制限された投
光光束を前記受光部の有効面積に一致させること
により、投光器と受光器の光軸合わせを行う。
In the present invention having such a configuration, the effective area of the light receiving part of the light receiver is regulated by a slit placed in the front surface of the light receiver, and the projected light flux from the light source of the projector is divided into a predetermined area including the light from the center of the light receiver. The diameter of the projected light is limited by a pinhole and guided to the projecting lens system, and while the output of the light receiving section that receives the projected light flux from the projecting lens system is monitored on the projector side, the optical axis adjustment mechanism is used to guide the projecting light flux through the pinhole. After adjusting the effective area of the light-receiving part to be within the diameter of the limited emitted light beam, the effective area of the light-receiving part is further adjusted by using an aperture that passes only the light from the center of the emitted light beam limited by the pinhole. The light beam is guided to the projecting lens system with a diameter approximately equal to the area, and the optical axis adjustment mechanism adjusts the aperture while monitoring the output of the light receiving section that receives the projecting light beam from the projecting lens system. The optical axes of the projector and receiver are aligned by matching the projected light flux limited by the effective area of the light receiving section.
以下、本発明の一実施例を第１図及び第５図〜
第７図に基づいて説明する。
An embodiment of the present invention will be described below with reference to FIGS. 1 and 5.
This will be explained based on FIG.
第１図は光軸調整時即ち較正時の状態を示す本
発明の一実施例の構成図、第５図は光軸調整前ま
たは光透過 Figure 1 is a configuration diagram of an embodiment of the present invention showing the state during optical axis adjustment, that is, during calibration, and Figure 5 is before optical axis adjustment or light transmission.
Claims (1)
対向配置し、前記投光器の光源から受光器の受光
部へ投光しつつ、前記投入器と受光器の光軸を投
光器側に設けた光軸調整機構で光軸合わせする光
透過率測定装置における光軸合わせ方法におい
て、 前記受光部の有効面積をその前面に配置したス
リツトによつて規制しておき、 前記光源からの投光光束をその中心部の光を含
む所定の径にピンホールにより制限して投光レン
ズ系に導き、この投光レンズ系から前記投光光束
を受光した受光部の出力を前記投光器側で監視し
ながら前記光軸調整機構で前記ピンホールにより
制限した投光光束の径内に前記受光部の有効面積
が入るように調整した後、 前記ピンホールにより制限された投光光束をそ
の中心部の光のみを通す絞りで更に前記受光部の
有効面積と略等しい径に制限して前記投光レンズ
系に導き、この投光レンズ系から前記投光光束を
受光した受光部の出力を前記投光器側で監視しな
がら前記光軸調整機構で前記絞りにより制限され
た投光光束を前記受光部の有効面積に一致させる
ことを特徴とする光透過率測定装置における光軸
合わせ方法。[Scope of Claims] 1. A light projector and a light receiver on both sides of a transmittance measurement point are placed facing each other, and while light is emitted from the light source of the light projector to the light receiving part of the light receiver, the optical axis of the light projector and the light receiver is aligned. In an optical axis alignment method for a light transmittance measurement device in which the optical axis is aligned using an optical axis adjustment mechanism provided on the projector side, the effective area of the light receiving section is regulated by a slit arranged in front of the light receiving section, and the effective area of the light receiving section is regulated by a slit arranged in front of the light receiving section, The projected light flux is restricted by a pinhole to a predetermined diameter including the light at the center and guided to a light projecting lens system, and the output of the light receiving section that receives the projected light flux from this projecting lens system is transmitted to the projector side. After adjusting the effective area of the light-receiving section using the optical axis adjustment mechanism while monitoring with the diameter of the emitted light beam limited by the pinhole, A diaphragm that allows only the light to pass through is further limited to a diameter approximately equal to the effective area of the light receiving section, and guides it to the light projecting lens system, and the output of the light receiving section that has received the projected light flux from the light projecting lens system is An optical axis alignment method in a light transmittance measuring device, characterized in that the optical axis adjustment mechanism adjusts the emitted light flux limited by the aperture to match the effective area of the light receiving section while monitoring on the projector side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22553784A JPS61104240A (en) | 1984-10-26 | 1984-10-26 | Alignment of optical axis in light transmissivity measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22553784A JPS61104240A (en) | 1984-10-26 | 1984-10-26 | Alignment of optical axis in light transmissivity measuring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61104240A JPS61104240A (en) | 1986-05-22 |
| JPH0480337B2 true JPH0480337B2 (en) | 1992-12-18 |
Family
ID=16830844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22553784A Granted JPS61104240A (en) | 1984-10-26 | 1984-10-26 | Alignment of optical axis in light transmissivity measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61104240A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4823020B2 (en) * | 2006-11-01 | 2011-11-24 | 三菱重工業株式会社 | Gas concentration monitoring system, fixed station and mobile station, and gas concentration measuring method |
| JP2012028621A (en) * | 2010-07-26 | 2012-02-09 | Tokuyama Corp | Measurement device for measuring variation in transmittance of sample due to repeated laser irradiation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57151551A (en) * | 1981-03-10 | 1982-09-18 | Merubo Shinshifuku Kk | Automatic winder for stripe material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58132846U (en) * | 1982-03-01 | 1983-09-07 | 沖電気工業株式会社 | Optical axis deviation detection mechanism |
-
1984
- 1984-10-26 JP JP22553784A patent/JPS61104240A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57151551A (en) * | 1981-03-10 | 1982-09-18 | Merubo Shinshifuku Kk | Automatic winder for stripe material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61104240A (en) | 1986-05-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |