JPS5815104A - Measuring method for rate of change in thickness of paint layer - Google Patents
Measuring method for rate of change in thickness of paint layerInfo
- Publication number
- JPS5815104A JPS5815104A JP11468581A JP11468581A JPS5815104A JP S5815104 A JPS5815104 A JP S5815104A JP 11468581 A JP11468581 A JP 11468581A JP 11468581 A JP11468581 A JP 11468581A JP S5815104 A JPS5815104 A JP S5815104A
- Authority
- JP
- Japan
- Prior art keywords
- light
- paint layer
- interference fringes
- change
- convex lens
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、塗料層の層厚の時間的な変化量を測定する
方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring the amount of change over time in the layer thickness of a paint layer.
塗料層の層厚の変化量は、溶剤の塗料層外への離脱状況
および塗料層内の物質の構造変化に関連する。したがっ
て塗料層の層厚の変化量の測定は、塗膜の性質や塗装の
作業条件を定めるために必須である。The amount of change in the layer thickness of the paint layer is related to the state of release of the solvent to the outside of the paint layer and the structural change of substances within the paint layer. Therefore, measurement of the amount of change in the layer thickness of the paint layer is essential for determining the properties of the paint film and the working conditions for painting.
ところで、従来、塗料層の層厚変化量測定装置として、
種々のものが提供されているが、これらは未だ十分な性
能を持っているとはいえない。たとえば塗料層表面に直
接接触してその層厚を測定する装置は、被塗装物の表面
が平滑でなければならないので、汎用性がなく、また測
定時に接触圧力を一定にしなければならないので面倒で
あシ、しかも塗料層の測定箇所が接触により破壊される
という欠点がある。またこの種の装置は、塗料層の層厚
の変化を時々刻々時系列的に迅速かつ正確に測定できな
いという欠点がある。By the way, conventionally, as a layer thickness change measurement device for a paint layer,
Although various types have been provided, they cannot yet be said to have sufficient performance. For example, a device that directly contacts the surface of a paint layer to measure its thickness is not versatile because the surface of the object to be coated must be smooth, and it is cumbersome because the contact pressure must be constant during measurement. There is a drawback that the measuring points of the reeds and also the paint layer are destroyed by contact. Additionally, this type of device has the disadvantage that it is not possible to quickly and accurately measure changes in the thickness of the paint layer from moment to moment in chronological order.
そこで、本発明者は、これらの欠点を除去するものとし
て、最近、塗料層の表面に対する略垂直線上に、レザー
光等の干渉性の良好な光を発する光源と、該光源からの
光を平行光束にするコリメータレンズと、該コリメータ
レンズからの光束を収束する第１凸レンズと、該第１凸
レンズの焦点位置にあって該第１凸レンズからの光を通
過させるピンホールと、該ピンホールを通過した光を一
定光束にする第２凸レンズと、該第２凸レンズからの光
の一部を反射させる一方他の一部を通過させて上記塗料
層表面に照射する半透明鏡とを配列すると共に、上記半
透明鏡を挾んで上記垂直線の両側に、上記半透明鏡から
の反射光を再反射させる全反射鏡と、該全反射鏡からの
反射光を受光すると共に上記塗料層表面からの反射光を
受光するレシーバとを備えて、該レシーバに干渉縞を形
成し、該干渉縞の移動数をフォートダイオードアレイを
利用して測定するか、あるいは干渉縞を拡大撮像して、
該干渉縞を目視計数するかして、塗料層の層厚変化量を
測定するようにすることにより、該層厚変化量を、塗料
層を破壊せずに、しかも時々刻々時系列的に正確かつ簡
単、迅速に測定できるようにした塗料層の層厚変化量測
定装置を新規に提案した特願昭５５−５６７１４）。Therefore, in order to eliminate these drawbacks, the present inventor has recently developed a light source that emits light with good coherence, such as laser light, on a line substantially perpendicular to the surface of the paint layer, and parallel light from the light source. a collimator lens that converts the light beam into a light beam; a first convex lens that converges the light beam from the collimator lens; a pinhole that is located at the focal point of the first convex lens and allows the light from the first convex lens to pass; and a pinhole that passes through the pinhole. a second convex lens that converts the light into a constant flux, and a semi-transparent mirror that reflects a part of the light from the second convex lens while allowing the other part to pass through and irradiate the surface of the paint layer, A total reflection mirror that re-reflects the reflected light from the semi-transparent mirror is placed between the semi-transparent mirror on both sides of the vertical line, and a total reflection mirror that receives the reflected light from the total reflection mirror and reflects the light from the surface of the paint layer. and a receiver that receives light, forming interference fringes on the receiver, measuring the number of movements of the interference fringes using a Fort diode array, or enlarging and imaging the interference fringes,
By measuring the amount of change in the thickness of the paint layer by visually counting the interference fringes, the amount of change in the layer thickness can be accurately measured from time to time without destroying the paint layer. (Japanese Patent Application No. 55-56714) proposed a new device for measuring the amount of change in thickness of a paint layer that could be easily and quickly measured.
しかし、本発明者は、上記の如く干渉縞を利用した優れ
た塗料層の層厚変化量測定装置においても、まだ下記の
如き欠点があることを発見した。However, the inventors of the present invention have discovered that even with the above-described excellent apparatus for measuring the amount of change in layer thickness of a paint layer that utilizes interference fringes, there are still drawbacks as described below.
すなわち、塗料層表面の状態は時々刻々変化するもので
あり、また、光の反射率も低く、乱反射を含むものであ
るから、レシーバに形成される干渉縞は微弱、微小で、
コントラストも弱いものとなることが多いのに対して、
フォートダイオードアレイは感度、光−電気特性とも一
般に不十分なものであるので、フォートダイオードアレ
イを用いて、゛ 微弱、微小な干渉縞を検出するのは
、コヌトパーーフオーマンヌ上限度がある。また、干渉
縞の目視計数は、測定者に大きな肉体的負担をかける。In other words, the condition of the surface of the paint layer changes from time to time, and the reflectance of light is low and includes diffuse reflection, so the interference fringes formed on the receiver are weak and minute.
While the contrast is often weak,
Since Fort diode arrays generally have insufficient sensitivity and opto-electrical characteristics, there is an upper limit to the performance of detecting weak and minute interference fringes using Fort diode arrays. Furthermore, visual counting of interference fringes places a large physical burden on the measurer.
また、光路を調整して、強力で測定しやすい干渉縞を形
成することも可能であるが、このためには光路の機器の
位置の微調整が必要であり、そのためつ時間が必要とな
って、塗膜を形成した時点直後から計測を開始すること
ができないという欠点がある。It is also possible to adjust the optical path to form strong, easy-to-measure interference fringes, but this requires fine-tuning the position of the equipment in the optical path, which is time consuming. However, there is a drawback that measurement cannot be started immediately after the coating film is formed.
したがって、この発明の目的は、上記装置において、簡
単、安価に、レシーバ上の微弱、微小な干渉縞を拡大し
、そのコントラストを明確にして、光路の機器の位置調
整を不要にでき、したがって塗膜を形成した直後から計
測を迅速、容易、確実にでき、さらに塗料層表面での溶
剤蒸気や空気対流等による干渉縞のゆらぎに対する蔚容
性をも増し得て、溶剤蒸気や乾燥空気流の存在のもとで
、塗料層の層厚変化量を測定できる測定方法を新規に提
供することにある。Therefore, an object of the present invention is to use the above-mentioned apparatus to easily and inexpensively magnify weak and minute interference fringes on the receiver, clarify the contrast, and eliminate the need for adjusting the position of equipment in the optical path. Immediately after the film is formed, measurements can be made quickly, easily, and reliably. Furthermore, it can increase the tolerance to fluctuations in interference fringes caused by solvent vapor or air convection on the surface of the paint layer, and can be The object of the present invention is to provide a new measuring method that can measure the amount of change in the layer thickness of a paint layer under the presence of a paint layer.
このため、この発明の塗料層の層厚変化量測定方法は、
前記干渉縞がレシーバに形成される装置を用い、該干渉
縞をテレビカメラにより拡大撮像してモニターテレビ画
面上に写し出し、該モニターテレビ画面上に取シ付けた
光電素子により、該モニターテレビ画面上の干渉縞の光
強度を電気信号に変えて、該電気信号の出力波形により
干渉縞の移動数を計数して塗料層の層厚変化量を測定す
るようにしたことを特徴としている。For this reason, the method for measuring the amount of change in layer thickness of a paint layer according to the present invention is as follows:
Using a device in which the interference fringes are formed on a receiver, the interference fringes are enlarged and imaged by a television camera and projected onto a monitor television screen, and a photoelectric element attached to the monitor television screen is used to image the interference fringes on the monitor television screen. The present invention is characterized in that the light intensity of the interference fringes is converted into an electrical signal, and the number of movements of the interference fringes is counted based on the output waveform of the electrical signal to measure the amount of change in the layer thickness of the paint layer.
以下、この発明を図示の実施例について詳細に説明する
。Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
まず、この実施例に用いる装置について説明する。First, the apparatus used in this example will be explained.
第１図において、１は試料台、２は該試料台ｌに塗装さ
れた塗料層である。In FIG. 1, 1 is a sample stage, and 2 is a paint layer coated on the sample stage l.
上記塗料層２の表面に対する略垂直線上には、上方より
順次レーザ光源３、コリメータレンズ４、第１凸レンズ
５、偏光フィルター７、ピンホール板８のピンホール８
ａ、単レンズ・よりなる第２凸レンズ９および半透明鏡
１０を配列している。On a line substantially perpendicular to the surface of the paint layer 2, in order from above, a laser light source 3, a collimator lens 4, a first convex lens 5, a polarizing filter 7, and a pinhole 8 of a pinhole plate 8 are arranged.
a, a second convex lens 9 consisting of a single lens and a semi-transparent mirror 10 are arranged.
上記コリメータレンズ４は、レーザ光源３より発射され
たレーザ・ビーム１１を平行光束にするようになってい
る。上記第１凸レンズ５は、コリメータレンズからの平
行光束をピンホール８ａ上に収束させるようにしている
。すなわちピンホール８ａは、第１凸レンズ５の焦点上
に設けている。The collimator lens 4 is configured to convert the laser beam 11 emitted from the laser light source 3 into a parallel light beam. The first convex lens 5 is configured to converge the parallel light beam from the collimator lens onto the pinhole 8a. That is, the pinhole 8a is provided on the focal point of the first convex lens 5.
第１凸レンズ５とピンホール８ａとの間の偏光フィルタ
ー７は、上記垂直線に対して傾斜させて、レーザ・ビー
ムの偏光方向を単一にすると共に、ノイズ成分を除去す
るようにしている。上記ピンホール８ａから拡大する光
束は、上記第２凸レンズ９により略直径５〜９朋の平行
光束にするようにしている。すなわち、上記ピンホール
８ａは第２凸レンズ９に対してもその焦点上に位置する
。The polarizing filter 7 between the first convex lens 5 and the pinhole 8a is inclined with respect to the above-mentioned perpendicular line so as to make the polarization direction of the laser beam uniform and to remove noise components. The light beam expanding from the pinhole 8a is converted into a parallel light beam with a diameter of approximately 5 to 9 mm by the second convex lens 9. That is, the pinhole 8a is also located on the focal point of the second convex lens 9.
上記半透明鏡１０は、上記垂直線すなわち光軸に対して
略４５°傾斜させて、上記第２凸レンズ９からのレーザ
・ビームの一部を通過させて、塗料層２の表面に略直径
５〜９朋で照射する一方、他の一部のレーザ・ビームを
上記垂直線に対する直交方向に反射するようにしている
。The semi-transparent mirror 10 is tilted at approximately 45 degrees with respect to the vertical line, that is, the optical axis, and allows a portion of the laser beam from the second convex lens 9 to pass therethrough, so that the surface of the paint layer 2 has a diameter of approximately 5 mm. ~9 beams are irradiated, while some of the other laser beams are reflected in a direction perpendicular to the vertical line.
一方、上記半透明鏡１０を挾んで上記垂直線に対する直
交方向両側には、全反射鏡１２とレシーバ１３を固定し
ている。上記全反射鏡１２は上記半透明鏡１０からの反
射光を再び同一方向に再反射させるようになっている。On the other hand, a total reflection mirror 12 and a receiver 13 are fixed on both sides of the semi-transparent mirror 10 in a direction orthogonal to the vertical line. The total reflection mirror 12 is configured to reflect the light reflected from the semi-transparent mirror 10 again in the same direction.
また上記レシーバ１３は、上記全反射鏡１２からの反射
光および塗料層２表面からの反射光を半透明鏡１０を介
して受光するようになっている。すなわち、全反射鏡１
２からの反射光は半透明鏡１０を通過してレシーバ１３
に至シ、塗料層２０表面からの反射光は反送明鏡１０に
よシ再反射されてレシーバ１３に至るようになっている
。Further, the receiver 13 receives the reflected light from the total reflection mirror 12 and the reflected light from the surface of the paint layer 2 via the semi-transparent mirror 10. That is, total reflection mirror 1
The reflected light from 2 passes through the semi-transparent mirror 10 and reaches the receiver 13.
Finally, the reflected light from the surface of the paint layer 20 is re-reflected by the anti-transmission mirror 10 and reaches the receiver 13.
上記レシーバ１３は受光部としてのテレビカメラ２１を
備える。上記テレビカメラ２１に形成される像を拡大撮
像して、モニターテレビ２２の画面２２ａ上に写し出す
ようにしている。該モニターテレビ２２の画面２２ａ上
にフオートトランジヌタ等の光電素子２３を取り付けて
いる。光電素子２３は上記画面２２ａの一点の光強度を
電気信号に変換して第２図に示すようにアンブリファイ
ア２４に出力するようにしている。アンブリファイア２
４は上記電気信号を増巾して、出力し、その出力波形を
記録計２５で記録するようにしている。The receiver 13 includes a television camera 21 as a light receiving section. The image formed on the television camera 21 is enlarged and displayed on the screen 22a of the monitor television 22. A photoelectric element 23 such as a photo transistor is installed on the screen 22a of the monitor television 22. The photoelectric element 23 converts the light intensity at one point on the screen 22a into an electrical signal and outputs it to the amplifier 24 as shown in FIG. Amblifier 2
4 amplifies and outputs the electrical signal, and records the output waveform with a recorder 25.
まだ、アンブリファイア２４からの出力信号をローパス
フィルター２６に入力して、ノイズ成分を除去した後、
マイクロコンピュータを用いたデータ処理装置２７に入
力して、塗料層の層厚変化量を下記の如く自動的に算出
して表示するようにしている。すなわち、モニターテレ
ビ２２上の一点の明暗を示すローパスフィルタ２６から
出力される電圧を第３図に示すようにＡ／Ｄ変換器２７
５に加えて、デジタル信号に変換した後、基準時間発生
器２７４より発生するクロツクパルヌにしたがってサン
プリングし、メモリ２７３に格納する。上記サンプリン
グされた時系列データは、不揮発性メモリ２７２に予め
格納されているプログラムにより、中央処理装置２７１
で演算処理されて、出力波形のピーク検出すなわちモニ
ターテレビの一点上の干渉縞の明暗の検出、および時間
当りの上記ピークの計数すなわち時間当りの干渉縞の移
動数の計数を行とない、さらに、その計数鎮を塗料層の
層厚変化量に換算し、その層厚変化量を示す信号をイン
ターフェイス２７６．２７８を介して、ディスプレイ装
置２７７およびプリンター２７９へ入力して、塗料層の
層厚変化量を自動的に時々刻々表示させると共に、印字
させるようにしている。After inputting the output signal from the amblifier 24 to the low-pass filter 26 to remove noise components,
The data is input to a data processing device 27 using a microcomputer, and the amount of change in the layer thickness of the paint layer is automatically calculated and displayed as described below. That is, as shown in FIG.
5, after converting into a digital signal, it is sampled according to the clock pulse generated by the reference time generator 274 and stored in the memory 273. The sampled time series data is transferred to the central processing unit 271 by a program stored in the nonvolatile memory 272 in advance.
The output waveform is subjected to calculation processing to detect the peaks of the output waveform, that is, to detect the brightness and darkness of the interference fringes at one point on the monitor television, and to count the peaks per time, that is, to count the number of movements of the interference fringes per time. , the counting scale is converted into the amount of change in the layer thickness of the paint layer, and a signal indicating the amount of change in layer thickness is inputted to the display device 277 and printer 279 via the interfaces 276 and 278 to calculate the change in the layer thickness of the paint layer. The amount is automatically displayed every moment and is also printed.
次に、この実施例の方法について説明する。Next, the method of this example will be explained.
まず、塗料台１に層厚変化量を測定すべき塗料２を塗布
し、レーザ光源３からレーザビーム１１を発射する。こ
のレーザビーム１１はコリメータレンズ４により平行光
束にされる。平行光束にされたレーザビームは、第１凸
レンズ５により、ピンホール８ａ上に収束されて、該ピ
ンホール８ａによりレーザ光のノイズ成分が除去される
。またこのピンホール８ａに至るレーザビームは偏光フ
ィルタ７により、偏光方向を単一にされてノイズ成分が
除去されている。このようにノイズ成分が除去されて偏
光方向が単一になったレーザビームは、第２凸レンズ９
により５〜９ ＭＭの直径の平行光束にされて、半透明
鏡１０に至る。First, a paint 2 whose layer thickness change amount is to be measured is applied to a paint table 1, and a laser beam 11 is emitted from a laser light source 3. This laser beam 11 is made into a parallel beam by a collimator lens 4. The collimated laser beam is focused onto the pinhole 8a by the first convex lens 5, and the noise component of the laser beam is removed by the pinhole 8a. Further, the laser beam reaching this pinhole 8a is polarized in a single direction by a polarizing filter 7, and noise components are removed. The laser beam from which the noise component has been removed and whose polarization direction is unified is passed through the second convex lens 9.
The light beam is converted into a parallel light beam with a diameter of 5 to 9 mm, and reaches the semi-transparent mirror 10.
この半透明鏡１０は、上記レーザビームの一部を通過さ
せて、その平行光束により塗料層２の表面の直径５〜９
ＮＭの範囲を照射する一方、他の一部のレーザビームを
反射して全反射鏡１２に至らせる。上記全反射鏡１２か
ら反射されたレーザビームは光路Ｘを通シ、すなわち半
透明鏡１０を通過してレシーバ１３に至る。一方、塗料
層２の表面から反射されたレーザビームは、光路Ｙを通
って、すなわち半透明鏡１０により再反射されてレシー
バ１３に至る。This semi-transparent mirror 10 allows a part of the laser beam to pass through, and uses the parallel light flux to form a surface of the paint layer 2 with a diameter of 5 to 9 mm.
While irradiating the NM range, some other laser beams are reflected to reach the total reflection mirror 12. The laser beam reflected from the total reflection mirror 12 passes through the optical path X, that is, passes through the semi-transparent mirror 10 and reaches the receiver 13. On the other hand, the laser beam reflected from the surface of the paint layer 2 passes through the optical path Y, that is, is re-reflected by the semi-transparent mirror 10 and reaches the receiver 13.
上記レシーバ１３内のテレビカメラ２１には、光路Ｘを
通ってくるレーザビームと、光路Ｙを通ってくるレーザ
ビームとによシ干渉縞が形成される。この干渉縞は、両
光路Ｘ、Ｙの光路差によシ生じる。そして、この干渉縞
は、光路ｘ、ｙを通るレーザ光のノイズ成分が上記の如
くすでに除去されているので、相当に明瞭であるが、そ
れでも、塗料層２の表面は反射率が低く、また乱反射を
含むものであるため、レシーバ１３内の干渉縞は微小で
コントラヌトも弱いものになる場合が多い。Interference fringes are formed on the television camera 21 in the receiver 13 by the laser beam passing through the optical path X and the laser beam passing through the optical path Y. These interference fringes are caused by the optical path difference between the two optical paths X and Y. These interference fringes are quite clear because the noise components of the laser light passing through the optical paths x and y have already been removed as described above, but even so, the surface of the paint layer 2 has a low reflectance, and Since it includes diffuse reflection, the interference fringes within the receiver 13 are often minute and the contranuto is weak.
しかし、この実施例においては、干渉縞を次のようにし
て、確実、簡単、迅速に計測する。すなわち、レシーバ
１３内の干渉縞をテレビカメラ２１によって拡大撮像し
てモニターテレビ２２の画面２２ａ上に写し出す。However, in this embodiment, interference fringes are measured reliably, simply, and quickly in the following manner. That is, the interference fringes in the receiver 13 are enlarged and imaged by the television camera 21 and displayed on the screen 22a of the monitor television 22.
このモニターテレビ２２の画面２２ａ上に拡大して写し
出された干渉縞は、塗料層２の乾燥等による層厚変化に
応じて移動する。一方、光電素子２３で上記画面２２ａ
上の一点の光強度を電気信号に変換し、この電気信号を
第２図に示すアンブリファイア２４で増巾して、記録計
２５に入力して、光電素子２３の出力波形を第４図に示
すように記録させる。この第４図から、光電素子２３に
対向するモニターテレビ２２の画面２２ａ上の一点の明
暗の時間的変化が分かる。したがって、時間当シの上記
出力波形のピーク数、つまり時間当シの干渉縞の移動数
を算出して、塗料層の層厚変化量を算出する。なお、第
４図に示す出力波形において、領域Ａは干渉縞の測定直
後であって、塗料層の層厚が急激に変化する状態を示し
、領域Ｂは測定を終了する間際であって、塗料の層厚が
緩やかに変化する状態を示す。The interference fringes enlarged and displayed on the screen 22a of the monitor television 22 move according to changes in the layer thickness due to drying of the paint layer 2 or the like. On the other hand, the photoelectric element 23
The light intensity at one point above is converted into an electrical signal, and this electrical signal is amplified by the amplifier 24 shown in FIG. Have them record it as shown. From FIG. 4, the temporal change in brightness of a point on the screen 22a of the monitor television 22 facing the photoelectric element 23 can be seen. Therefore, the number of peaks of the output waveform per time, that is, the number of movements of the interference fringes per time is calculated, and the amount of change in the thickness of the paint layer is calculated. In the output waveform shown in FIG. 4, region A is immediately after the measurement of interference fringes and shows a state in which the layer thickness of the paint layer changes rapidly, and region B is just before the end of the measurement and shows a state in which the thickness of the paint layer changes rapidly. This shows a state in which the layer thickness changes gradually.
また、上記塗料層の層厚変化量は、次のように自動的に
算出・表示することもできる。すなわち、アンブリファ
イア２４の出力信号ヲローバスフィルター２６を通して
、ノイズ成分を除去した後、データ処理装置２７に入力
して、前述の如く、塗料層の層厚変化量を自動的に算出
・表示するようにすることもできる。Further, the amount of change in the layer thickness of the paint layer can also be automatically calculated and displayed as follows. That is, after noise components are removed from the output signal of the amblifier 24 through the low-pass filter 26, the signal is input to the data processing device 27, and as described above, the amount of change in the layer thickness of the paint layer is automatically calculated and displayed. You can also do it like this.
以上の説明で明らかな如く、この発明の方法によれば、
上記レシーバに干渉縞を形成する装置を用い、該干渉縞
をテレビカメラにより拡大撮像してモニターテレビ画面
上に写じ出し、該モニターテレビ画面上の一点に取り付
けた光電素子によシ、該モニターテレビ画面上の干渉縞
の光強度を電気信号に変えて、該電気信号の出力波形に
より干渉縞の移動数を計数して塗料層の層厚変化量を測
定するようにしているので、簡単、安価な方法でもって
、たとえレシーバ上に形成される干渉縞が微弱、微小な
ものであっても、塗料層の層厚変化量を迅速、確実に測
定することができる。したがって、この発明の方法によ
れば、光路の神器の位置調整を不要にできて、塗膜を形
成した直後から塗料層の層厚変化を計測でき、さらに塗
料層表面での溶剤蒸気や空気対流等による干渉縞のゆら
ぎに対する許容性をも増し得て、溶剤蒸気や乾燥空気流
の存在のもとで、塗料層の層厚変化量を測定できる。As is clear from the above explanation, according to the method of this invention,
A device for forming interference fringes is used in the receiver, the interference fringes are enlarged and imaged by a television camera, and projected onto a monitor television screen, and a photoelectric element attached to a point on the monitor television screen is used to image the interference fringes. The light intensity of the interference fringes on the TV screen is converted into an electrical signal, and the number of movements of the interference fringes is counted based on the output waveform of the electrical signal to measure the amount of change in the thickness of the paint layer. Even if the interference fringes formed on the receiver are weak or minute, the amount of change in the thickness of the paint layer can be measured quickly and reliably using an inexpensive method. Therefore, according to the method of this invention, there is no need to adjust the position of the optical path, and changes in the thickness of the paint layer can be measured immediately after the paint film is formed. It is also possible to increase the tolerance to fluctuations in the interference fringes caused by such factors, and it is possible to measure the amount of change in the layer thickness of the paint layer in the presence of solvent vapor or dry air flow.
第１図はこの発明の一実施例に用いる装置の模へ
１・・・試料台、２・・・塗料層、３・・・レーザ光源
、４・・・コリメータレンズ、５・・・第１凸レンズ、
８ａ・・・ピンホール、９・・・第２凸レンズ、１０・
・・半透明鏡、１２・・・全反射鏡、１３・・・レシー
バ、２１・・・テレビカメラ、２２・・・モニターテレ
ビ、２３・・・光電素子。FIG. 1 shows a model of an apparatus used in an embodiment of the present invention. 1... sample stage, 2... paint layer, 3... laser light source, 4... collimator lens, 5... first convex lens,
8a... Pinhole, 9... Second convex lens, 10.
... Semi-transparent mirror, 12... Total reflection mirror, 13... Receiver, 21... Television camera, 22... Monitor television, 23... Photoelectric element.
Claims (1)
好な光を発する光源と、該光源からの光を平行光束にす
るコリメータレンズと、該コリメータレンズからの光束
を収束する第１凸レンズと、該第１凸レンズの焦点位置
にあって該第１凸レンズからの光を通過させるピンホー
ルと、該ピンホールを通過した光を一定光束にする第２
凸レンズと、該第２凸レンズからの光の一部を反射させ
る一方他の一部を通過させて上記塗料層表面に照射する
半透明鏡とを配列すると共に、上記半透明鏡を挾んで上
記垂直線Ｏ′両側に、上記半透明鏡からの反射光を再反
射させる全反射鏡と、該全反射鏡からの反射光を受光す
ると共に上記塗料層表面からの反射光を受光するレシー
バとを設けてなる装置を用い、 上記レシーバに形成される干渉縞をテレビカメラにより
拡大撮像してモニターテレビ画面上に写し出し、該モニ
ターテレビ画面上に取り付けた光電素子により、該モニ
ターテレビ画面上の干渉縞の光強度を電気信号に変えて
、該電気信号の出力波形によシ干渉縞の移動数を計数し
て塗料層の層厚変化量を測定するようにしたことを特徴
とする塗料層の層厚変化量測定方法。(1) A light source that emits light with good coherence on a line substantially perpendicular to the surface of the paint layer, a collimator lens that converts the light from the light source into a parallel beam, and a first convex lens that converges the beam from the collimator lens. a pinhole that is located at the focal point of the first convex lens and allows the light from the first convex lens to pass; and a second pinhole that converts the light that has passed through the pinhole into a constant beam.
A convex lens and a semi-transparent mirror that reflects part of the light from the second convex lens while allowing the other part to pass through and illuminate the surface of the paint layer are arranged, and the semi-transparent mirror is sandwiched between the semi-transparent mirror and the perpendicular mirror. A total reflection mirror that re-reflects the reflected light from the semi-transparent mirror, and a receiver that receives the reflected light from the total reflection mirror and also receives the reflected light from the paint layer surface are provided on both sides of the line O'. The interference fringes formed on the receiver are enlarged and imaged with a television camera and projected onto a monitor television screen, and a photoelectric element attached to the monitor television screen is used to image the interference fringes on the monitor television screen. A layer thickness of a paint layer, characterized in that the amount of change in the layer thickness of the paint layer is measured by converting light intensity into an electric signal and counting the number of movements of interference fringes according to the output waveform of the electric signal. How to measure change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11468581A JPS5815104A (en) | 1981-07-21 | 1981-07-21 | Measuring method for rate of change in thickness of paint layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11468581A JPS5815104A (en) | 1981-07-21 | 1981-07-21 | Measuring method for rate of change in thickness of paint layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5815104A true JPS5815104A (en) | 1983-01-28 |
Family
ID=14644073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11468581A Pending JPS5815104A (en) | 1981-07-21 | 1981-07-21 | Measuring method for rate of change in thickness of paint layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5815104A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6125466A (en) * | 1984-07-13 | 1986-02-04 | Nippon Shiyotsuken Kk | Production of processed food using ground fish meat |
| JPH02302102A (en) * | 1989-04-24 | 1990-12-14 | Hughes Aircraft Co | Improved antenna beam forming system |
| CN107505435A (en) * | 2017-10-11 | 2017-12-22 | 上海三恩化工有限公司 | Coating container intermediate coat pin hole limit test method |
-
1981
- 1981-07-21 JP JP11468581A patent/JPS5815104A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6125466A (en) * | 1984-07-13 | 1986-02-04 | Nippon Shiyotsuken Kk | Production of processed food using ground fish meat |
| JPH02302102A (en) * | 1989-04-24 | 1990-12-14 | Hughes Aircraft Co | Improved antenna beam forming system |
| CN107505435A (en) * | 2017-10-11 | 2017-12-22 | 上海三恩化工有限公司 | Coating container intermediate coat pin hole limit test method |
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