JPH0750038B2 - Measuring method of see-through characteristics of plastic film - Google Patents
Measuring method of see-through characteristics of plastic filmInfo
- Publication number
- JPH0750038B2 JPH0750038B2 JP2267059A JP26705990A JPH0750038B2 JP H0750038 B2 JPH0750038 B2 JP H0750038B2 JP 2267059 A JP2267059 A JP 2267059A JP 26705990 A JP26705990 A JP 26705990A JP H0750038 B2 JPH0750038 B2 JP H0750038B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- video signal
- signal level
- see
- plastic film
- 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
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、光透過性プラスチックフィルムのシースルー
特性の測定方法に関し、詳しくは光透過性フィルムのシ
ースルー特性をオンラインで迅速かつ正確に測定できる
プラスチックフィルムのシースルー特性を測定方法に関
する。Description: TECHNICAL FIELD The present invention relates to a method for measuring see-through characteristics of a light-transmissive plastic film, and more specifically, a plastic capable of quickly and accurately measuring the see-through characteristics of a light-transmissive film online. The present invention relates to a method for measuring see-through characteristics of a film.
従来、フィルムの面状態、即ちシースルー特性を測定す
る手段としては第６図に示す如きオフライン測定器が知
られている。この測定器は、同図に示す如く、検出ライ
ンとブランクラインの二系列の比較によってサンプルの
面状態を測るもので、光源50:ミラー51a、51b、スリッ
ト52a、52b、サンプル53、レンズ54a、54b、スリット55
a、55b、検出器56a、56b、対数変換演算器57、アンプ5
8、表示部59によって構成される。Conventionally, an offline measuring device as shown in FIG. 6 is known as a means for measuring the surface condition of the film, that is, the see-through characteristic. This measuring device measures the surface condition of the sample by comparing two lines of the detection line and the blank line as shown in the figure, and the light source 50: mirrors 51a, 51b, slits 52a, 52b, sample 53, lens 54a, 54b, slit 55
a, 55b, detectors 56a, 56b, logarithmic conversion calculator 57, amplifier 5
8 and a display unit 59.
しかし、従来のオフライン測定器では、サンプルとして
１〜3cm角のフィルムを切り取ってセットする必要があ
り、測定終了したら別個のサンプルをセットする必要が
あるため、連続的に測定することはできなかった。However, with the conventional off-line measuring device, it is necessary to cut out a film of 1 to 3 cm square as a sample and set it, and it is necessary to set a separate sample after the measurement, so continuous measurement was not possible .
また小さく切り取ったサンプルについて測定したとして
も実際のフィルムの面状態とは言えず、オフライン測定
器で良好なデータが得られても、実際の製品フィルムに
表面あれや厚みむらが生じていても見のがす恐れがある
というう欠点があった。Even if you measure a sample cut into small pieces, it cannot be said that the actual surface condition of the film, and even if good data is obtained with an offline measuring device, it is possible to see whether the actual product film has surface roughness or thickness unevenness. It had the drawback that it could come off.
そこで走行中のフィルムのシースルー特性を迅速か連続
的に、しかも正確に測定できるプラスチックフィルムの
シースルー特性の測定方法の開発が望まれていた。Therefore, it has been desired to develop a method for measuring the see-through characteristic of a plastic film that can measure the see-through characteristic of a running film quickly, continuously, and accurately.
フィルムのシースルー特性を迅速かつ連続的にしかも正
確に測定できる方法としては、あらかじめCCDカメラの
ような電子カメラを用いて基準チャートを透明フィルム
を介さずに撮影して基準画像を得、次いで走行中の透明
フィルムを介して撮影して撮影画像を得、基準画像と撮
影画像と画面上で対比して透明フィルムをひずみを調べ
る方法が考えられる（特願平１−178219号参照）。As a method to measure the see-through characteristics of the film quickly, continuously and accurately, a reference chart is taken in advance using an electronic camera such as a CCD camera without passing through a transparent film, and then a reference image is obtained. A method is conceivable in which a photographed image is obtained by photographing through the transparent film, and the distortion of the transparent film is examined by comparing the reference image with the photographed image on the screen (see Japanese Patent Application No. 1-178219).
しかし、基準画像と撮影画像とを画面上で対比する手段
はどうしても人間の力に頼らざるを得なかったため、測
定結果に個人差がでたり、また測定の迅速性及び測定結
果情報のフィードバックの迅速性という面で不充分であ
り、さらに測定の完全自動化をはかることができなかっ
た。However, because the means for comparing the reference image and the captured image on the screen had to rely on human power, the measurement results differed among individuals, and the speed of measurement and quick feedback of measurement result information were high. In terms of sex, it was insufficient, and it was not possible to fully automate the measurement.
そこで、本発明の目的は、測定結果に個人差がでたりす
ることがなく、また測定の迅速化及び測定結果情報のフ
ィードバックの迅速化並びに測定の完全自動化をはかる
ことが可能になるシースルー特性の測定方法を提供する
ことにある。Therefore, an object of the present invention is to provide a see-through characteristic that does not cause individual differences in measurement results, and that enables speeding up of measurement, speeding up of feedback of measurement result information, and complete automation of measurement. It is to provide a measuring method.
本発明者らは、上記目的を達成すべく、鋭意検討を重ね
た結果、本発明を完成するに至った。The present inventors have completed the present invention as a result of intensive studies to achieve the above object.
即ち、本発明に係るプラスチックフィルムのシースルー
特性の測定方法は、光透過性プラスチックフィルムの背
面に設けられた基準細線を有する反射板に照射された光
の反射光をフィルムの前面に設けられた受光部で感知
し、映像信号レベルに変換することによりプラスチック
フィルムのシースルー特性を測定する方法において、 前記プラスチックフィルムを介さずに前記基準細線の映
像信号レベルL0を得、次いで測定対象フィルムを介して
前記基準細線の映像信号レベルL1を求め、該映像信号レ
ベルL1と前記映像信号レベルL0とを比較し評価すること
を特徴とする。That is, the method for measuring the see-through characteristic of the plastic film according to the present invention is such that the reflected light of the light applied to the reflector having the reference thin line provided on the back surface of the light-transmissive plastic film is received by the front surface of the film. In the method of measuring the see-through characteristic of a plastic film by sensing the image signal level by converting it into a video signal level, the video signal level L 0 of the reference thin line is obtained without passing through the plastic film, and then through the film to be measured. The video signal level L 1 of the reference thin line is obtained, and the video signal level L 1 and the video signal level L 0 are compared and evaluated.
また本発明に係るプラスチックフィルムのシースルー特
性の測定方法は、上記の測定方法において、前記プラス
チックフィルムを介さずに前記基準細線の映像信号レベ
ルL0を得、次いで各種フィルムを介して前記基準細線の
映像信号レベルＬｎを求め、該映像信号レベルＬｎと前
記映像信号レベルL0と比較し評価して各種フィルムにつ
いてのシースルー特性値を求めると共に該シースルー特
性値に対応する各種フィルムの映像信号レベルＬｎを記
憶部にあらかじめ記憶させておき、次いで測定対象フィ
ルムについての映像信号レベルＬｘを求め、該映像信号
レベルＬｘと前記映像信号レベルＬｎとを比較し評価す
ることを特徴とする。Further, the method of measuring the see-through characteristic of the plastic film according to the present invention, in the above-mentioned measuring method, obtains the video signal level L 0 of the reference thin line without the plastic film, and then the reference thin line of various films through various films. The video signal level L n is obtained, and the see-through characteristic value for each film is obtained by comparing the video signal level L n with the video signal level L 0 to evaluate and the video signal level of each film corresponding to the see-through characteristic value. L n is stored in the storage unit in advance, the video signal level L x of the film to be measured is then obtained, and the video signal level L x and the video signal level L n are compared and evaluated. .
また本発明の好ましい態様としては、受光部が１又は２
以上の電子カメラであることであり、また１台の電子カ
メラが前記フィルムの幅方向に往復動可能に構成されて
いることであり、ささらに前記反射板が前記フィルムの
有効幅と略々同じ長さであり、前記基準細線が前記フィ
ルムの幅方向に直角に所定間隔をあけて設けられた複数
の直線からなり、該複数の直線の一部又は全部が各々太
さを異にすることである。In a preferred embodiment of the present invention, the light receiving section is 1 or 2
The electronic camera is the above electronic camera, and one electronic camera is configured to be capable of reciprocating in the width direction of the film, and the reflector is substantially the same as the effective width of the film. It is a length, the reference thin line is composed of a plurality of straight lines provided at a predetermined interval at right angles to the width direction of the film, by part or all of the plurality of straight lines having different thicknesses. is there.
基準細線に照射された光はその基準細線で光エネルギー
が吸収され、特に基準細線のなかでも比較的太線部では
光吸収量が多くなるので、受光部に好ましく用いられる
所謂CCDカメラに入光する光エネルギーは低くなり、得
られた映像信号レベルは低く表われる。逆に比較的細線
部では光吸収量が少ないのでCCDカメラによっって得ら
れる映像信号レベルは高くなる。プラスチックフィルム
に歪等が場合には、その部分で光の一部は乱反射される
ためCCDカメラに入る光エネルギーは小さくなり、その
ためCCDカメラによって得られる映像信号レベルは低く
表われる。このようにしてフィルムの面状態に応じた映
像信号レベルを得ると共にフィルムを介しないときの映
像信号レベルを比較対象としてフィルムのシースルー特
性を迅速に求めることができる。The light irradiated to the reference thin line absorbs light energy in the reference thin line, and the light absorption amount is relatively large particularly in the relatively thick line portion among the reference thin lines, so the light enters the so-called CCD camera which is preferably used in the light receiving portion. The light energy is low and the resulting video signal level appears low. On the contrary, since the light absorption amount is relatively small in the thin line portion, the image signal level obtained by the CCD camera becomes high. When the plastic film is distorted, a part of the light is diffusely reflected at that portion, so that the light energy entering the CCD camera becomes small, so that the video signal level obtained by the CCD camera appears low. In this way, it is possible to obtain a video signal level according to the surface condition of the film and quickly obtain the see-through characteristic of the film by using the video signal level when not passing through the film as a comparison target.
さらにシースルー特性値に対応する各種フィルムの映像
信号レベルを記憶部にあらかじめ記憶させておき、次い
で測定対象フィルムについての映像信号レベルを求め、
該映像信号レベルとあらかじめ記憶された前記映像信号
レベルとを比較し評価することによって、シースルー特
性のより迅速な測定を可能にする。Furthermore, the video signal levels of various films corresponding to the see-through characteristic value are stored in the storage unit in advance, and then the video signal level of the film to be measured is obtained.
By comparing and evaluating the video signal level with the previously stored video signal level, a quicker measurement of the see-through characteristic is enabled.
第１図に基いて本発明の測定方法を説明する。 The measuring method of the present invention will be described with reference to FIG.
同図において、１は光透過性プラスチックフィルム、２
は受光部、３は基準細線3Aを有する反射板、４は光源、
５はアンプ、６は明暗修正部、７はA/D変換器、８は記
憶部、９はコンピュータである。In the figure, 1 is a light-transmissive plastic film, 2
Is a light receiving part, 3 is a reflector having the reference thin line 3A, 4 is a light source
Reference numeral 5 is an amplifier, 6 is a brightness correction unit, 7 is an A / D converter, 8 is a storage unit, and 9 is a computer.
本発明において測定対象となる光透過性プラスチックフ
ィルム１は、光透過性のものであればよく無色フィル
ム、着色フィルムのいずれであってもよい。なお光透過
率は特に限定されないが、50〜100％であればよい。The light-transmissive plastic film 1 to be measured in the present invention may be a light-transmissive plastic film, and may be a colorless film or a colored film. The light transmittance is not particularly limited, but may be 50 to 100%.
フィルムの検査幅は特に限定されず、1000〜6000mmの範
囲にあればよく、具体例としては、3300mm,4200mmの２
タイプが挙げられる。The inspection width of the film is not particularly limited as long as it is in the range of 1000 to 6000 mm, and specific examples include 3300 mm and 4200 mm 2
There are types.
本発明において測定対象となるフィルムの厚みは特に限
定される訳ではないが、例えば30〜1000μｍの範囲にあ
ることが好ましく、またフィルムの搬送速度も特に限定
される訳ではないが、測定の迅速化という点で10〜500m
/min、好ましくは30〜200m/minの範囲にあることが好ま
しい。Although the thickness of the film to be measured in the present invention is not particularly limited, it is preferably in the range of, for example, 30 to 1000 μm, and the transport speed of the film is not particularly limited, but the rapid measurement is possible. 10-500m in terms of conversion
/ min, preferably in the range of 30 to 200 m / min.
本発明の測定項目はシースルー特性であり、ここにシー
スルー特性の測定というのはフィルムの面状態を調べる
ことであり、具体的には検査対象フィルムについてシー
スルー値を求めたり、映像信号レベル等を求めることに
よって調べることができる。ここでシースルー性とはフ
ィルムの透視度を表したもので、人間の目でフィルム越
しに物を見た場合、物が歪んで見える度合いを数値化し
たものである。光源から出た光はレンズによって平行度
±0.3゜以内となり、２光路に分かれる。１光路の光は
スリットで10φの光束となり、試料を通過後±0.4゜以
内のものが検出器に入り、他の１光路の光は試料なしで
検出器に入る。検出器では試料のない方を基準とし、二
つの比の−logをデジタル表示する（通常、報告データ
はデジタル表示値の100倍とし、−logT×102としてい
る）。The measurement item of the present invention is the see-through characteristic, and the measurement of the see-through characteristic is to check the surface condition of the film. Specifically, the see-through value or the video signal level of the film to be inspected is obtained. You can look it up. Here, the see-through property represents the transparency of a film, and is a numerical value of the degree to which an object looks distorted when viewed through the film with human eyes. The light emitted from the light source is collimated within ± 0.3 ° by the lens and split into two optical paths. The light of one optical path becomes a luminous flux of 10φ at the slit, and the light within ± 0.4 ° after passing through the sample enters the detector, and the light of the other one optical path enters the detector without the sample. In the detector, the one without a sample is used as a reference, and the -log of the two ratios is digitally displayed (usually, the reported data is 100 times the digitally displayed value and is -logT x 10 2 ).
尚、農ビに関してシースルー性測定の意義とは （１）強度面 シースルーの大小はフィルム表面の凹凸の大小であり、
厚さバラツキの大小とも言える。従って、強度、特に衝
撃強度においてはシースルー性との相関が強く、シース
ルー性改良が低温衝撃強度改良につながっている。What is the significance of see-through measurement for agricultural products? (1) Strength The size of the see-through is the size of the unevenness on the film surface,
It can be said that the thickness variation is large or small. Therefore, the strength, particularly the impact strength, has a strong correlation with the see-through property, and the improvement of the see-through property leads to the improvement of the low temperature impact strength.
（２）外観面 ハウス内の作物が外からきれいに見えた方が好感が持た
れることや、シースルー性の悪いフィルムは光線透過率
が劣ると、誤解されやすい（実際の全光線透過率は変り
ない）。(2) Appearance It is easy to misunderstand that the crops inside the house look good from the outside, and the film with poor see-through properties has poor light transmittance (actual total light transmittance does not change. ).
本発明においてフィルムのシースルー特性は、フィルム
製造過程における走行中に測定されることが好ましい
が、本発明の効果を損なわない範囲で一時的に停止させ
て測定してもかまわない。In the present invention, the see-through property of the film is preferably measured during running in the film manufacturing process, but may be temporarily stopped and measured within a range that does not impair the effects of the present invention.
本発明の受光部２は、特に限定される訳ではないが、例
えばCCDカメラ等の固体撮像素子を用いた各種電子カメ
ラや光センサー等を用いることができるが好ましくは電
子カメラである。電子カメラの台数は１台であってもよ
いし、複数台であってもよい。電子カメラの台数は主に
カメラ視野とフィルムを検査幅に応じて決定され、例え
ば第３図に示すようにカメラ１台の視野が1200mm、フィ
ルムの検査幅が3300mmの場合カメラは３台あればよい
し、またフィルムの検査幅が4200mmの場合カメラは４台
あればよい。The light receiving unit 2 of the present invention is not particularly limited, but various electronic cameras using a solid-state image pickup device such as a CCD camera, an optical sensor or the like can be used, but an electronic camera is preferable. The number of electronic cameras may be one or plural. The number of electronic cameras is mainly determined by the field of view of the camera and the inspection width of the film. For example, as shown in FIG. 3, if the field of view of one camera is 1200 mm and the inspection width of the film is 3300 mm, there are three cameras. Good, and if the film inspection width is 4200 mm, then four cameras are enough.
またカメラ１台で測定することもできる。具体的には第
５図に示すようにカメラをフィルムの幅方向に移動可能
に構成することにより測定することができるがこの装置
に限定される訳ではない。第５図において、電子カメラ
２は架台10上に設けれたサーボモータ11に回動可能に取
付けられたボールスクリュウ12に往復動可能に固定され
ている。移動方向の規制はリニアガイド13によって行わ
れる。It is also possible to measure with one camera. Specifically, as shown in FIG. 5, the camera can be moved in the width direction of the film for measurement, but the present invention is not limited to this device. In FIG. 5, the electronic camera 2 is reciprocally fixed to a ball screw 12 rotatably attached to a servo motor 11 provided on a frame 10. The linear guide 13 regulates the moving direction.
撮影用光源４は特に限定されないが、例えば蛍光灯、ハ
ロゲンランプ等が用いられる。この光源は直接でもよい
し、ファイバー光として用いてもよい。Although the photographing light source 4 is not particularly limited, for example, a fluorescent lamp, a halogen lamp, or the like is used. This light source may be direct or may be used as fiber light.
次に本発明の基準細線について説明する。基準細線を有
する反射板については第２図に示してあるがこれに限定
されない。Next, the reference thin line of the present invention will be described. The reflector having the reference thin line is shown in FIG. 2, but is not limited to this.
本発明において基準細線は直線であってよいし又曲線で
あってもよい。また基準細線の色については光源から発
せられる光エネルギーの一部を吸収する色であればよ
く、好ましくは黒である。In the present invention, the reference thin line may be a straight line or a curved line. The color of the reference thin line may be any color that absorbs part of the light energy emitted from the light source, and is preferably black.
基準細線の太さは全て均一の太さであってもよいが、好
ましくは第２図に示すように各々の基準細線を異なった
太さの線によって構成することである。即ち第２図にお
いて反射板３上に描かれた基準細線3Aは３つの太さの線
が１組となるように構成されており、その太さは例えば
基準細線ａ＝1mm、ｂ＝0.5mm、ｃ＝0.3mmとなるように
構成されることが好ましい。このように基準細線の太さ
を変化させる利点は、次の通りである。The thickness of the reference thin lines may be all uniform, but it is preferable to configure each of the reference thin lines with a line having a different thickness as shown in FIG. That is, in FIG. 2, the reference thin line 3A drawn on the reflection plate 3 is configured so that one line having three thicknesses is formed, and the thickness is, for example, the reference thin line a = 1 mm, b = 0.5 mm. , C = 0.3 mm. The advantages of changing the thickness of the reference thin line in this way are as follows.
即ち、異なる線巾のものを使用するメリットは、フィ
ルムの厚さに適した線巾がある。従って、同一でも良い
が、フィルムの厚さが異なるものを測定する場合が多い
ので、異なる線巾のものを使用するのが好ましい。That is, the advantage of using different line widths is that the line width is suitable for the film thickness. Therefore, although the film thicknesses may be the same, it is often the case that different film thicknesses are measured. Therefore, it is preferable to use those having different line widths.
黒度（濃度）を見るのが、コントラストの取り易いも
の、即ち強い程良く、黒色が好ましい。The degree of blackness (density) is easy to obtain, that is, the stronger, the better, and black is preferable.
反射板３はフィルムの有効幅と略々同じ長さであること
が好ましいが、電子カメラと共に移動できるように構成
される場合は長さは限定されない。また反射板３の材質
は反射可能で基準細線を設けることができるものであれ
ば特に限定されない。The reflection plate 3 is preferably substantially the same length as the effective width of the film, but the length is not limited as long as it is configured so as to be movable together with the electronic camera. The material of the reflection plate 3 is not particularly limited as long as it is reflective and can be provided with a reference thin line.
次にプラスチックフィルムのシースルー特性を測定する
方法についての実施例を説明する。Next, an example of a method for measuring the see-through characteristic of a plastic film will be described.
実施例１ 検査幅3300mmの軟質塩化ビニル樹脂フィルム（三井東圧
化学社製、厚さ75μｍ）を第１図のようにセットする。
電子カメラ１台当りの視野（有効フィルム幅）は1200mm
のものを用い、電子カメラの台数は３台とする。カメラ
とフィルム間距離は1140mm、分解能0.56mm/bitであっ
た。Example 1 A soft vinyl chloride resin film (manufactured by Mitsui Toatsu Chemicals, Inc., thickness: 75 μm) having an inspection width of 3300 mm is set as shown in FIG.
The field of view (effective film width) per electronic camera is 1200 mm
The number of electronic cameras is three and the number of electronic cameras is three. The distance between the camera and the film was 1140 mm, and the resolution was 0.56 mm / bit.
まず前記プラスチックフィルムを介さずに第２図に示す
基準細線の映像信号レベルL0を得る（第４図（Ａ））。
尚、ａ＝lmm、ｂ＝0.5mm、ｃ＝0.3mmとした。First, the video signal level L 0 of the reference thin line shown in FIG. 2 is obtained without passing through the plastic film (FIG. 4 (A)).
Incidentally, a = 1 mm, b = 0.5 mm and c = 0.3 mm.
次いで測定対象フィルムを介して前記基準細線の映像信
号レベルL1を求める（第４図（Ｂ））。Then, the video signal level L 1 of the reference thin line is obtained through the film to be measured (FIG. 4 (B)).
次いで前記映像信号レベルL1と前記映像信号レベルL0と
を比較する。Next, the video signal level L 1 and the video signal level L 0 are compared.
その結果、エネルギーレベルは第４図（Ｂ）の場合、第
４図（Ａ）に対し、全体として下がっているものの部分
的歪等は認められない。シースルー特性値は６であっ
た。As a result, in the case of FIG. 4 (B), the energy level is lower than that of FIG. 4 (A) as a whole, but no partial distortion or the like is observed. The see-through characteristic value was 6.
実施例２ 実施例１において、フィルムを1850mm巾のもので、100
μｍ厚さのものに代えた以外は同様にして映像信号レベ
ルL1を求めた。その結果第４図（Ｃ）のようになった。Example 2 In Example 1, the film was 1850 mm wide and 100
The video signal level L 1 was obtained in the same manner except that the thickness was changed to a μm-thick one. As a result, the result is as shown in FIG.
エネルギーレベルは第４図（Ａ）に対し、全体として下
がっているものの部分的歪等は認められない。シースル
ー特性値は７であった。The energy level is lower than that in FIG. 4 (A) as a whole, but no partial distortion is observed. The see-through characteristic value was 7.
実施例３ はじめに実施例１と同様にしてプラスチックフィルムを
介さずに基準細線の映像信号レベルL0を得た。Example 3 First, in the same manner as in Example 1, the video signal level L 0 of the reference thin line was obtained without using the plastic film.
次いでシースルー特性値の異るフィルムＡ、Ｂ、Ｃ……
Ｊについて、該フィルムを介して前記基準細線の映像信
号レベルＬＡ、ＬＢ、ＬＣ………ＬＪを求め、前記映像
信号レベルL0と比較し評価して各種フィルムについての
シースルー特性値を求めると共に該シースルー特性値に
対応する各種フィルムの映像信号レベルＬＡ、ＬＢ、Ｌ
Ｃ……ＬＪを記憶部にあらかじめ記憶させた。Next, films A, B, and C with different see-through characteristic values ...
For J, the video signal levels L A , L B , L C, ... L J of the reference thin line are obtained through the film, evaluated by comparing with the video signal level L 0, and see-through characteristic values for various films. And the video signal levels L A , L B , L of various films corresponding to the see-through characteristic value.
C: L J was stored in the storage unit in advance.
次いで測定対象フィルムＹ（2700mm巾で100μｍ厚さの
塩化ビニル樹脂フィルム、三井東圧化学社製）について
の映像信号レベルＬｘを求めた。 Next, the image signal level L x of the film to be measured Y (vinyl chloride resin film having a width of 2700 mm and a thickness of 100 μm, manufactured by Mitsui Toatsu Chemicals, Inc.) was determined.
該映像信号レベルＬｘと前記映像信号レベルＬＡ、
ＬＢ、ＬＣ……ＬＪとを比較し評価したところ、測定対
象フィルムＹはフィルムＣと近いシースルー特性を有す
ることが判った。The video signal level L x and the video signal level L A ,
When L B , L C ... L J were compared and evaluated, it was found that the film to be measured Y had see-through characteristics similar to those of the film C.
本発明によれば、測定結果に個人差がでたりすることが
なく、また測定の迅速化及び測定結果情報のフィードバ
ックの迅速化並びに測定の完全自動化をはかることが可
能になるシースルー特性の測定方法を提供することがで
きる。According to the present invention, there is no individual difference in the measurement result, and the measurement method of the see-through characteristic that enables speeding up of measurement, speeding up of feedback of measurement result information, and complete automation of measurement can be achieved. Can be provided.
また、この測定方法によって得られた情報をフィルム製
造工程にフィードバックする際に映像信号レベルをシン
クロスコープで撮影することによってフィードバックの
迅速化がはかれ、製造段階での不良品の減少をはかるこ
とができる。In addition, when the information obtained by this measurement method is fed back to the film manufacturing process, the feedback is speeded up by photographing the video signal level with a synchroscope, and it is possible to reduce defective products in the manufacturing stage. it can.
更に詳述すれば、透過性のフィルムや紙などの特性評価
項目としてさまざまなパラメータが考えられる。表面に
付着した欠点やピンホールなどである。そのほかフィル
ムにはその製造工程にて様々なスジや厚みのムラが発生
しフィルムの光透過特性（シースルー特性と称する）が
影響を受ける。ところがフィルムの用途としてフィルム
を通して中のものを見る場合など透過特性そのものが意
味を持つ場合がある。このような場合にはシースルー特
性自体がなんらかの方法で検査されねばならない。しか
るに、走行中のフィルムのシースルー特性をオンライン
で検査する方法は従来適当なものがなく必要性がもとめ
られていた。本発明はスースルー特性をオンラインにて
フィルム製造工程の中で検査するものでサンプルを切り
出す必要性がなく、かつ連続的に検査が行える特徴を有
する。More specifically, various parameters can be considered as characteristic evaluation items for transparent films and papers. Defects and pinholes attached to the surface. In addition, various streaks and unevenness in thickness are generated in the film during the manufacturing process, which affects the light transmission characteristics (referred to as see-through characteristics) of the film. However, there are cases where the transmission characteristics themselves have meaning, such as when viewing the inside through the film as the application of the film. In such cases, the see-through property itself must be inspected in some way. However, there is no suitable method for inspecting the see-through property of a running film online, and there is a need for it. The present invention is an on-line inspection of the through characteristic during the film manufacturing process, and has a feature that it is not necessary to cut out a sample and can be continuously inspected.
特に本発明では、所定のパターンを有するチャートをフ
ィルムを通して見れる位置に置く。チャートは照明され
ていてもされていなくてもよい。また処理を簡略化する
ためチャートには縦線を選べばよい。この状態でチャー
トと反対面よりフィルムを通してチャートを見るとチャ
ートはフィルムの影響を受けてなんらかの歪んだ形で見
ることができる。この歪にはフィルムの特性が反映され
ているとみなせる。歪の量を計るにはチャートの振幅と
幅を測定すればよい。具体的にはチャートをフィルムを
通してCCDカメラにて見てその信号をとりだす。従っ
て、装置及び処理について、概略、次の機器より構成さ
れることが特に好ましい。Particularly in the present invention, a chart having a predetermined pattern is placed at a position where it can be seen through the film. The chart may or may not be illuminated. Vertical lines may be selected for the chart to simplify the processing. In this state, when the chart is viewed through the film from the opposite side of the chart, the chart can be seen in some distorted form due to the influence of the film. It can be considered that this distortion reflects the characteristics of the film. To measure the amount of distortion, the amplitude and width of the chart may be measured. Specifically, the chart is viewed with a CCD camera through the film and the signal is extracted. Therefore, regarding the apparatus and the processing, it is particularly preferable that the apparatus is configured by the following equipment.
テストチャート CCDカメラ及び光源 A/Dコンバータ バッファメモリ コンピュータ 上記構成よりなり、チャートを検出したCCDカメラの信
号はA/Dコンバータにてデジタル量に変換される。0.1mm
から1.0mmの幅をもつ黒線のグループで構成されてい
る。チャートは反射照明にて利用する形態で示されてい
るが自照式のあんどんのようなものでもよい。また、チ
ャートの線幅を種々かえてあるがすべて同一幅であって
もよい。A/D変換器の変換速度はカメラの走査時間内で
行うのが最も良いがシースルー特性は急激には変化しな
いため高速でなくてもよい。A/D変換されたデータはコ
ンピュータへデータを転送するため一旦高速バッファメ
モリにストアされる。バッファメモリのデータはDMA転
送またはI/O転送によりコンピュータに転送されその波
高値と半値幅が計算によりもとめられる。この波高値及
び半値幅をあらかじめフィルムのない状態で求めてお
く。次に実際のフィルムで同様に波高値、半値幅をもと
める。両者の比をとりこの比をフィルム評価のパラメー
タとする。そのため、事前にフィルムの特性とこの比の
関係を作っておけばよい。Test chart CCD camera and light source A / D converter Buffer memory computer With the above configuration, CCD camera signals that detect the chart are converted into digital values by the A / D converter. 0.1 mm
It consists of a group of black lines with a width of from 1.0 mm. Although the chart is shown as being used in the reflective illumination, it may be a self-illuminating andon-like one. Further, although the line widths of the chart are changed, they may all have the same width. The conversion speed of the A / D converter is best performed within the scanning time of the camera, but the see-through characteristic does not need to change rapidly so it does not have to be high. The A / D converted data is temporarily stored in the high speed buffer memory in order to transfer the data to the computer. The data in the buffer memory is transferred to the computer by DMA transfer or I / O transfer, and its peak value and half-value width are calculated. The peak value and the full width at half maximum are obtained in advance without the film. Next, the peak value and the half-value width of the actual film are obtained in the same manner. The ratio between the two is taken and this ratio is used as a parameter for film evaluation. Therefore, the relationship between the film characteristics and this ratio should be made in advance.
チャートの線幅を幾つか準備することによりフィルム厚
が変わった場合、前述の比をより容易に求められるチャ
ート線幅が変化する場合があるため幾つかのチャート線
幅を同時に書いておけばすべて一枚のチャートで対応で
きることになる。従って、本発明によれば、オンライン
にて連続的に透過特性を検査できるし、サンプルを採集
しなくてもよい利点もある。If the film thickness is changed by preparing several chart line widths, the above-mentioned ratio may be more easily obtained.The chart line width may change, so if several chart line widths are written at the same time One chart will be enough. Therefore, according to the present invention, the transmission characteristics can be continuously inspected online, and there is an advantage that it is not necessary to collect a sample.
第１図は本発明の測定方法を示す原理図、第２図は基準
細線を有する反射板の一例を示す要部平面図、第３図は
電子カメラの配置例を示す側面図、第４図は映像信号レ
ベルを示す正面図、第５図は電子カメラの取付状態の実
施例を示す正面図、第６図は従来例を示す図である。 1:フィルム 2:受光部 3:反射板 3A:基準細線 4:光源FIG. 1 is a principle view showing a measuring method of the present invention, FIG. 2 is a plan view of a main part showing an example of a reflector having a reference fine line, FIG. 3 is a side view showing an arrangement example of an electronic camera, and FIG. Is a front view showing a video signal level, FIG. 5 is a front view showing an embodiment of an electronic camera in a mounted state, and FIG. 6 is a view showing a conventional example. 1: Film 2: Light receiving part 3: Reflector 3A: Reference fine line 4: Light source
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−176838（ＪＰ，Ａ) 特開 昭61−176839（ＪＰ，Ａ) 特開 昭56−30650（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 61-176838 (JP, A) JP 61-176839 (JP, A) JP 56-30650 (JP, A)
Claims (5)
けられた基準細線を有する反射板に照射された光の反射
光をフィルムの前面に設けられた受光部で感知し、映像
信号レベルに変換することによりプラスチックフィルム
のシースルー特性を測定する方法において、 前記プラスチックフィルムを介さずに前記基準細線の映
像信号レベルL0を得、次いで測定対象フィルムを介して
前記基準細線の映像信号レベルL1を求め、該映像信号レ
ベルL1と前記映像信号レベルL0とを比較し評価すること
を特徴とするプラスチックフィルムのシースルー特性の
測定方法。1. A light receiving portion provided on the front surface of the film detects the reflected light of the light applied to a reflecting plate having a thin reference line provided on the back surface of the light-transmissive plastic film and converts it into a video signal level. In the method for measuring the see-through characteristic of the plastic film, the video signal level L 0 of the reference thin line is obtained without the plastic film, and then the video signal level L 1 of the reference thin line is obtained through the film to be measured. A method for measuring a see-through characteristic of a plastic film, characterized by comparing and evaluating the video signal level L 1 and the video signal level L 0 .
けられた基準細線を有する反射板に照射された光の反射
光をフィルムの前面に設けられた受光部で感知し、映像
信号レベルに変換することによりプラスチックフィルム
のシースルー特性を測定する方法において、 前記プラスチックフィルムを介さずに前記基準細線の映
像信号レベルL0を得、次いで各種フィルムを介して前記
基準細線の映像信号レベルＬｎを求め、該映像信号レベ
ルＬｎと前記映像信号レベルL0と比較し評価して各種フ
ィルムについてのシースルー特性値を求めると共に該シ
ースルー特性値に対応する各種フィルムの映像信号レベ
ルＬｎを記憶部にあらかじめ記憶させておき、次いで測
定対象フィルムについての映像信号レベルＬｘを求め、
該映像信号レベルＬｘと前記映像信号レベルＬｎとを比
較し評価することを特徴とするプラスチックフィルムの
シースルー特性の測定方法。2. A light receiving section provided on the front surface of the film detects the reflected light of the light applied to a reflecting plate having a thin reference line provided on the back surface of the light-transmissive plastic film and converts it into a video signal level. In the method for measuring the see-through characteristic of a plastic film, the video signal level L 0 of the reference thin line is obtained without using the plastic film, and then the video signal level L n of the reference thin line is obtained through various films, The video signal level L n and the video signal level L 0 are compared and evaluated to obtain the see-through characteristic value for each film, and the video signal level L n of each film corresponding to the see-through characteristic value is stored in the storage unit in advance. Then, the video signal level L x of the film to be measured is obtained,
A method for measuring a see-through characteristic of a plastic film, characterized by comparing and evaluating the video signal level L x and the video signal level L n .
ことを特徴とする請求項１又は２記載のプラスチックフ
ィルムのシースルー特性の測定方法。3. The method for measuring the see-through characteristic of a plastic film according to claim 1, wherein the light receiving section is one or more electronic cameras.
に往復動可能に構成されていることを特徴とする請求項
３記載のプラスチックフィルムのシースルー特性の測定
方法。4. A method of measuring a see-through characteristic of a plastic film according to claim 3, wherein one electronic camera is reciprocally movable in a width direction of the film.
同じ長さであり、前記基準細線が前記フィルムの幅方向
に直角に所定間隔をあけて設けられた複数の直線からな
り、該複数の直線の一部又は全部が各々太さを異にする
ことを特徴とする請求項１、２、３又は４記載のプラス
チックフィルムのシースルー特性の測定方法。5. The reflecting plate has a length substantially the same as the effective width of the film, and the reference thin line comprises a plurality of straight lines provided at right angles to the width direction of the film at predetermined intervals. The method for measuring the see-through characteristic of a plastic film according to claim 1, 2, 3 or 4, wherein some or all of the plurality of straight lines have different thicknesses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2267059A JPH0750038B2 (en) | 1990-10-04 | 1990-10-04 | Measuring method of see-through characteristics of plastic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2267059A JPH0750038B2 (en) | 1990-10-04 | 1990-10-04 | Measuring method of see-through characteristics of plastic film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04143641A JPH04143641A (en) | 1992-05-18 |
| JPH0750038B2 true JPH0750038B2 (en) | 1995-05-31 |
Family
ID=17439465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2267059A Expired - Lifetime JPH0750038B2 (en) | 1990-10-04 | 1990-10-04 | Measuring method of see-through characteristics of plastic film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0750038B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19813073A1 (en) * | 1998-03-25 | 1999-09-30 | Laser Sorter Gmbh | Method and device for determining the optical quality and for detecting defects in flat glass and other optically transparent materials, in particular drips, threads and lines |
| JP5323248B1 (en) * | 2012-09-14 | 2013-10-23 | Ｊｘ日鉱日石金属株式会社 | Visibility evaluation method for transparent substrate and positioning method for laminate |
| JP5337907B1 (en) * | 2012-10-12 | 2013-11-06 | Ｊｘ日鉱日石金属株式会社 | Visibility evaluation device for transparent substrate, visibility evaluation program for transparent substrate and computer-readable recording medium on which it is recorded, positioning device for laminate, positioning program for laminate and computer-readable on which the recording is recorded Recording medium, apparatus for determining whether or not a mark of a laminate of a metal and a transparent substrate exists, a determination program, a computer-readable recording medium on which the mark is recorded, and a metal and a transparent substrate For detecting the position of a mark included in a laminate of the above, a detection program, and a computer-readable recording medium on which the same is recorded |
| CN104884936B (en) * | 2012-09-14 | 2017-10-03 | Jx日矿日石金属株式会社 | The evaluating apparatus of the surface state of metal material, the visibility evaluating apparatus of transparent base, its assessment process and record have its computer-readable recording medium |
| JP5269247B1 (en) * | 2012-10-12 | 2013-08-21 | Ｊｘ日鉱日石金属株式会社 | Apparatus for evaluating surface condition of metal material, program for evaluating surface condition of metal material, computer-readable recording medium on which the program is recorded, and method for evaluating surface condition of metal material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5630650A (en) * | 1979-08-22 | 1981-03-27 | Hitachi Ltd | Automatic chemical analyzer |
| JPS61176838A (en) * | 1985-01-31 | 1986-08-08 | Kanebo Ltd | Inspection of defect of transparent or semi-transparent plate-shaped body |
| JPS61176839A (en) * | 1985-01-31 | 1986-08-08 | Kanebo Ltd | Inspection of defect of transparent or semi-transparent plate-shaped body |
-
1990
- 1990-10-04 JP JP2267059A patent/JPH0750038B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04143641A (en) | 1992-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3922093A (en) | Device for measuring the roughness of a surface | |
| US6064478A (en) | Method of and apparatus for automatic detection of three-dimensional defects in moving surfaces by means of color vision systems | |
| US7227648B2 (en) | Method and apparatus for a touch-free examination of objects, particularly regarding the surface character of the same | |
| CA2683206C (en) | Enhanced imaging method and apparatus | |
| JPH0328749A (en) | Online type structure inspection system | |
| JPH0242307A (en) | Apparatus and method for displaying surface contour of convex object | |
| RU2378614C2 (en) | Method to control roughness of wood surface | |
| KR20080031922A (en) | Apparatus and methods for inspecting a composite structure for defects | |
| JP2003501649A (en) | High speed flaw detection apparatus and method for reflective materials | |
| US6757058B1 (en) | Fiber-optic light line for use in an inspection system | |
| CN113375583A (en) | Light path system, monocular three-dimensional image acquisition system and three-dimensional strain detection system | |
| CA2373682A1 (en) | Method and measuring arrangement for measuring paper surface | |
| JP2007507707A (en) | System and method for reflecting features of an object | |
| JPH0750038B2 (en) | Measuring method of see-through characteristics of plastic film | |
| JP3368512B2 (en) | Defect inspection method for transparent sheet-like molded product | |
| JPH06509416A (en) | Probe for surface measurement | |
| JP2004132773A (en) | System for checking gloss of fruits and vegetables | |
| JP2922250B2 (en) | Shape measuring device | |
| CA1168467A (en) | Apparatus for automatically detecting and evaluating the characteristics of prints | |
| JP2012220224A (en) | Method and device for measuring unevenness of reflected light | |
| JPH10115514A (en) | Method and apparatus for inspection of surface smoothness | |
| JPH08178855A (en) | Method for inspecting light-transmissive object or specular object | |
| JP2003047907A (en) | Coating testing method and coating testing device | |
| JPS60228943A (en) | Inspection of surface state of stainless steel plate | |
| JP2002139439A (en) | Diffused light source for inspection |