JP2003156394A - Method and instrument for liquid colorimetry - Google Patents
Method and instrument for liquid colorimetryInfo
- Publication number
- JP2003156394A JP2003156394A JP2001355839A JP2001355839A JP2003156394A JP 2003156394 A JP2003156394 A JP 2003156394A JP 2001355839 A JP2001355839 A JP 2001355839A JP 2001355839 A JP2001355839 A JP 2001355839A JP 2003156394 A JP2003156394 A JP 2003156394A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- thin film
- air
- film thickness
- light
- 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.)
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- Length Measuring Devices By Optical Means (AREA)
- Spectrometry And Color Measurement (AREA)
- Optical Measuring Cells (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、インキ等の着色液
体に光を照射して光学特性を測定する液体測色方法に関
し、特に印刷インキ等の製造ないし調製中などにおける
測色対象液体を直接導入し、該測色液体の光学特性を測
定する液体測色法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid colorimetric method for irradiating a colored liquid such as ink with light to measure optical characteristics, and particularly to a liquid colorimetric object to be measured directly during production or preparation of printing ink or the like. The present invention relates to a liquid colorimetric method for introducing and measuring the optical characteristics of the colorimetric liquid.
【0002】[0002]
【従来の技術】塗料、インキ、プラスチックなどの着色
液体の製造ないし調製中、または稼動中の印刷機等にお
いては、製造ないし調製時の着色液体の光学特性または
印刷機に供給される着色液体の光学特性を正確に把握す
る必要がある。その一つの方法として上記着色液体に光
を照射し、その透過光または反射光を分光分析する方法
(例えば特開平8−94441号公報)が知られてい
る。この種の光学特性測定法は、インキ等の着色液体の
膜(50ミクロン程度)を形成する測色用セルに、着色
液体の製造ないし調製システムまたは印刷機のインキパ
ンから採取した着色液体を収容し、この測色用セルに分
析用の光を照射し測色用セルの透過光または反射光を分
光分析手段で分析することで着色液体の光学特性を測定
するようにしている。2. Description of the Related Art In a printing machine or the like during manufacture or preparation of a coloring liquid such as paint, ink, plastic, etc., the optical characteristics of the coloring liquid at the time of manufacture or preparation or the coloring liquid supplied to the printing machine It is necessary to accurately grasp the optical characteristics. As one of the methods, there is known a method of irradiating the colored liquid with light and spectrally analyzing the transmitted light or the reflected light (for example, JP-A-8-94441). This kind of optical characteristic measuring method is to store a colored liquid collected from an ink pan of a manufacturing or preparing system of a colored liquid or a printing machine in a colorimetric cell that forms a film (about 50 microns) of a colored liquid such as ink. The optical characteristic of the colored liquid is measured by irradiating the color measurement cell with analysis light and analyzing transmitted light or reflected light of the color measurement cell with a spectroscopic analysis means.
【0003】このような着色液体の光学特性測定方法
は、着色液体の製造ないし調製システムまたは印刷のイ
ンキパンからインキを採取し、人手を介して測定用セル
に設定膜厚の液体薄膜を形成し、単発的に測色を行なっ
ている。また、この作業をリアルタイムでしかも人手を
介さず、自動で測定用セルに設定膜厚の液体薄膜を形成
し測色する液体測色方法も提案されている(例えば、特
開平11−304692号公報)。In such a method for measuring the optical characteristics of a colored liquid, ink is taken from a system for manufacturing or preparing a colored liquid or an ink pan for printing, and a liquid thin film having a set film thickness is formed in a measuring cell manually. The color is measured on a one-off basis. A liquid color measurement method has also been proposed in which this work is performed in real time and automatically without any human intervention, and a liquid thin film having a set film thickness is automatically formed on the measurement cell to perform color measurement (for example, Japanese Patent Laid-Open No. 11-304692). ).
【0004】[0004]
【発明が解決しようとする課題】しかしながら、人手を
介する液体測色法では、セルの洗浄や液体薄膜の形成に
個人差が生じたり、また大気中のごみの混入等が発生す
るため、実際に形成される着色液体薄膜の膜厚が設定し
た膜厚値とは異なる膜厚で形成されることになり、正確
な光学特性を求めることが困難であります。また、人手
を介さずに自動で測定用セルに液体薄膜を形成し測色す
る液体測色方法においては、測定用セルの洗浄も自動で
行なうことが可能であるが、繰返し測定を行なうことで
測定用セルに汚れが付着し、実際に形成される着色液体
薄膜の膜厚が設定した膜厚値とは異なる膜厚で形成され
てしまい、正確な光学特性を求めることが困難であるこ
とが問題として挙げられている。本発明は上記の事情に
鑑みなされたもので、本発明の目的は測定毎に設定また
は設計した膜厚と異なっている着色液体薄膜の膜厚を測
定し、設定膜厚と着色液体薄膜の膜厚との膜厚差に応じ
た補正を施すことで、より正確な光学特性を求める液体
測色方法を提供することにある。However, in the liquid colorimetry method which involves human hands, there are individual differences in cell cleaning and liquid thin film formation, and dust in the atmosphere is mixed. Since the film thickness of the colored liquid thin film to be formed is different from the set film thickness value, it is difficult to obtain accurate optical characteristics. Further, in the liquid colorimetry method in which a liquid thin film is formed on a measurement cell automatically and without any human intervention, it is possible to automatically wash the measurement cell, but by repeating the measurement. It is difficult to obtain accurate optical characteristics because dirt adheres to the measurement cell and the film thickness of the colored liquid thin film actually formed is different from the set film thickness value. Listed as a problem. The present invention has been made in view of the above circumstances, and an object of the present invention is to measure the film thickness of a colored liquid thin film which is different from the film thickness set or designed for each measurement, and set the film thickness and the film of the colored liquid thin film. It is to provide a liquid colorimetric method that obtains more accurate optical characteristics by performing a correction according to a film thickness difference from the thickness.
【0005】[0005]
【課題を解決するための手段】本発明において上記目的
を達成するために、まず請求項1の発明では、着色液体
を測色するための液体測色方法であって、透明な平面部
を有し、該平面部が略平行に対向配置された第1及び第
2部材間に空気を導入し、該第1及び第2部材間を規定
間隔の間隙にする空気薄膜形成工程と、前記空気薄膜領
域に光源から光を照射し、前記空気薄膜領域を透過及び
/又は反射する、透過光及び/又は反射光を分光測定す
る空気薄膜分光測定工程と、前記空気薄膜分光測定工程
で得られた分光スペクトル強度を用いて空気薄膜の膜厚
値を算出する空気膜厚算出工程と、前記第1及び第2部
材間に着色液体を導入し、該第1及び第2部材間を規定
間隔の間隙にする液体薄膜形成工程と、前記着色液体の
薄膜形成領域に光源から光を照射し、前記着色液体薄膜
形成領域を透過及び/又は反射する、透過光及び/又は
反射光を分光センサにより検出して着色液体の光学特性
を測定する液体薄膜分光測定工程と、前記空気膜厚算出
工程で得られた空気薄膜の膜厚値と液体薄膜形成工程で
設定した液体薄膜の膜厚値より膜厚差を算出し、その膜
厚差に応じて測定した液体薄膜の光学特性を補正する補
正工程と、を含んでいることを特徴とする液体測色方法
としたものである。In order to achieve the above object in the present invention, first of all, in the invention of claim 1, there is provided a liquid colorimetry method for colorimetric measurement of a colored liquid, comprising a transparent flat surface portion. An air thin film forming step of introducing air between first and second members whose flat portions are opposed to each other in a substantially parallel manner to form a gap between the first and second members at a specified interval; An air thin film spectroscopic measurement step of irradiating an area with light from a light source and transmitting and / or reflecting the air thin film area, and spectroscopically measuring transmitted light and / or reflected light, and a spectrum obtained in the air thin film spectroscopic measurement step. An air film thickness calculating step of calculating a film thickness value of an air thin film by using spectral intensity, and introducing a colored liquid between the first and second members to form a gap having a specified interval between the first and second members. Liquid thin film forming step, and Liquid thin film spectroscopic measurement step of irradiating light from the colored liquid thin film formation region and transmitting and / or reflecting the colored liquid thin film forming region, detecting transmitted light and / or reflected light by a spectroscopic sensor to measure optical characteristics of the colored liquid, The film thickness difference is calculated from the film thickness value of the air film obtained in the air film thickness calculation process and the liquid film thickness value set in the liquid film formation process, and the optical properties of the liquid film measured according to the film thickness difference. A liquid colorimetric method characterized by including a correction step for correcting the characteristics.
【0006】また、請求項2の発明では、着色液体を測
色するための液体測色方法であって、透明な平面部を有
し、該平面部が略平行に対向配置された第1及び第2部
材間に空気を導入し、該第1及び第2部材間を複数に変
化させた間隙を形成する空気薄膜形成工程と、前記複数
形成された空気薄膜毎の領域に光源から光を照射し、前
記空気薄膜領域を透過及び/又は反射する、透過光及び
/又は反射光を分光測定する空気薄膜分光測定工程と、
前記空気薄膜分光測定工程で得られた複数の分光スペク
トル強度を用いて複数の空気薄膜の膜厚値を算出する空
気膜厚算出工程と、前記第1及び第2部材間に着色液体
を導入し、該第1及び第2部材間の間隙を前記空気薄膜
形成工程と同じ複数の間隙に形成する液体薄膜形成工程
と、前記着色液体の複数形成された薄膜毎の領域に光源
から光を照射し、前記着色液体薄膜形成領域を透過及び
/又は反射する、透過光及び/又は反射光を分光センサ
により検出して着色液体の光学特性を測定する液体薄膜
分光測定工程と、前記空気膜厚算出工程で得られた空気
薄膜の各膜厚値と液体薄膜形成工程で設定した液体薄膜
の各膜厚値より膜厚差を算出し、その膜厚差に応じて測
定した液体薄膜の光学特性を補正する補正工程と、を含
んでいることを特徴とする液体測色方法としたものであ
る。According to a second aspect of the present invention, there is provided a liquid colorimetric method for colorimetric measurement of a colored liquid, comprising first and second transparent flat portions which are opposed to each other substantially in parallel. Air thin film forming step of introducing air between the second members to form a plurality of gaps between the first and second members, and irradiating light from a light source to each of the plurality of formed air thin films Then, an air thin film spectroscopic measurement step of spectroscopically measuring transmitted light and / or reflected light, which transmits and / or reflects the air thin film region,
An air film thickness calculation step of calculating film thickness values of a plurality of air thin films using a plurality of spectral spectral intensities obtained in the air thin film spectroscopic measurement step, and introducing a colored liquid between the first and second members. A liquid thin film forming step of forming a gap between the first and second members in the same plurality of gaps as in the air thin film forming step, and irradiating light from a light source to a region for each thin film formed of the colored liquid. A liquid thin film spectroscopic measurement step of transmitting and / or reflecting the colored liquid thin film forming area, measuring transmitted light and / or reflected light by a spectroscopic sensor to measure optical characteristics of the colored liquid, and the air film thickness calculating step. Calculate the film thickness difference from each film thickness value of the air thin film obtained in step 1 and each film thickness value of the liquid thin film set in the liquid thin film formation process, and correct the optical characteristics of the liquid thin film measured according to the film thickness difference. Correction process to It is obtained by the liquid color measurement method according to.
【0007】また、請求項3の発明では、前記補正工程
は、着色液体の散乱特性に応じた補正を施すことを特徴
とする請求項1または2に記載の液体測色方法としたも
のである。According to the third aspect of the invention, the liquid colorimetry method according to the first or second aspect is characterized in that the correction step is a correction according to the scattering characteristic of the colored liquid. .
【0008】また、請求項4の発明では、請求項1から
3のいずれかの液体測色方法より着色液体の分光特性を
算出する液体測色装置としたものである。According to a fourth aspect of the present invention, there is provided a liquid colorimetric apparatus which calculates the spectral characteristic of a colored liquid by the liquid colorimetric method according to any one of the first to third aspects.
【0009】本発明の液体測色方法によれば、初めに空
気膜厚を計ることで、第1及び第2部材に付着した洗浄
しても落ちない汚れの厚みを考慮した真の膜厚を算出す
ることができるので、液体測色を行った時に設定した正
しい膜厚に補正することが可能になる。According to the liquid colorimetric method of the present invention, by measuring the air film thickness first, the true film thickness is taken into consideration in consideration of the thickness of the stains attached to the first and second members that are not removed by washing. Since it can be calculated, it becomes possible to correct to the correct film thickness set when liquid colorimetry was performed.
【0010】[0010]
【発明の実施の形態】先ず本発明の第1の発明について
実施例を用いて説明する。図1は本発明にかかる液体測
色方法を実施する液体測色装置の一実施例の全体構成図
である。石英ガラスやサファイアガラス等の透明な材料
から構成された、測定用セルの凸部材1及び凹部材2が
配置されている。凸部材は可動ロット部5と一体化した
部材3に設置させており、凹部材はセル受け板4に設置
されていて、凸部材を含む可動ロット部5は凹部材を近
接する方向に往復運動させる可動シリンダ6を備えてい
る。BEST MODE FOR CARRYING OUT THE INVENTION First, the first invention of the present invention will be described with reference to embodiments. FIG. 1 is an overall configuration diagram of an embodiment of a liquid colorimetric apparatus for implementing a liquid colorimetric method according to the present invention. The convex member 1 and the concave member 2 of the measuring cell, which are made of a transparent material such as quartz glass or sapphire glass, are arranged. The convex member is installed on the member 3 integrated with the movable lot unit 5, the concave member is installed on the cell receiving plate 4, and the movable lot unit 5 including the convex member reciprocates in the direction of approaching the concave member. The movable cylinder 6 is provided.
【0011】凹部材2には凸部材1が、最も深く侵入す
る前進端位置を規制する当接部10が形成されていて、
凹部材2の底面と凸部材1の先端面で構成する略平行な
間隙に液体薄膜を形成できるようになっている。The concave member 2 is formed with an abutting portion 10 for restricting the forward end position where the convex member 1 penetrates the deepest,
A liquid thin film can be formed in a substantially parallel gap formed by the bottom surface of the concave member 2 and the tip surface of the convex member 1.
【0012】次に実施の動作について説明する。はじめ
に、着色液体を注入しない状態で、可動シリンダ6によ
って可動ロット部5を下げ、凸部材1の先端面と凹部材
2の底面間に空気薄膜を形成し、その空気薄膜を保持し
つつ、光源(図示せず)のハロゲンランプからの光をラ
イトガイド7で空気薄膜に対してほぼ垂直に光を照射す
る。空気薄膜を透過した光を分光器8で受光し、波長毎
の強度(スペクトル強度)を得る。このスペクトル強度分
布はこの空気薄膜の膜厚に応じた分布をしており、スペ
クトル分布から薄膜の膜厚を算出することができる。
尚、本実施例では、光源は少なくとも400nm〜70
0nmの可視光領域の波長を連続的に持つものを用いて
いる。Next, the operation of the embodiment will be described. First, in a state where the colored liquid is not injected, the movable lot portion 5 is lowered by the movable cylinder 6, an air thin film is formed between the tip surface of the convex member 1 and the bottom surface of the concave member 2, and the light source is held while holding the air thin film. Light from a halogen lamp (not shown) is radiated by the light guide 7 substantially perpendicularly to the air thin film. The light transmitted through the air thin film is received by the spectroscope 8 and the intensity (spectral intensity) for each wavelength is obtained. The spectral intensity distribution has a distribution corresponding to the film thickness of the air thin film, and the film thickness of the thin film can be calculated from the spectral distribution.
In this embodiment, the light source is at least 400 nm to 70 nm.
A continuous wave having a wavelength in the visible light region of 0 nm is used.
【0013】ここで、膜厚の算出にはスペクトル分布を
予測し、膜厚を決定するカーブフィッティング法とスペ
クトルのピーク位置より求めるPV(ピーク−バレー)
法が有るが、ここではPV法を適用している。本PV法
では、スペクトル分布の1つのピーク波長をλ1、そこ
からX波だけ離れたピーク波長をλ2、また測定対象と
なる物質の波長λにおける屈折率分布をn(λ)とする
と、その膜厚dは以下の式で表される。Here, in calculating the film thickness, a PV (peak-valley) which is obtained from a curve fitting method for predicting the spectral distribution and determining the film thickness and a peak position of the spectrum is used.
Although there is a method, the PV method is applied here. In the PV method, assuming that one peak wavelength of the spectral distribution is λ 1 , the peak wavelength away from it by X waves is λ 2 , and the refractive index distribution of the substance to be measured at the wavelength λ is n (λ), The film thickness d is represented by the following formula.
【0014】[0014]
【数1】 [Equation 1]
【0015】空気薄膜の膜厚算出後、可動シリンダ6を
用いて凸部材1と凹部材2との隙間を、液体が侵入でき
る程度(1mm程度で良い)に広げ、液体注入口から被
測定着色液体を注入し、再び可動シリンダ6を下げ、凸
部材1の先端面と凹部材2の底面に液体薄膜を形成し、
その薄膜状態を保持し、光源のハロゲンランプからの光
をライトガイド7で液体薄膜に光を照射する。After the film thickness of the air thin film is calculated, the movable cylinder 6 is used to widen the gap between the convex member 1 and the concave member 2 to such an extent that liquid can enter (about 1 mm is sufficient), and the color to be measured is measured from the liquid inlet. Liquid is injected, the movable cylinder 6 is lowered again, and a liquid thin film is formed on the tip surface of the convex member 1 and the bottom surface of the concave member 2,
The thin film state is maintained, and light from the halogen lamp of the light source is applied to the liquid thin film by the light guide 7.
【0016】また、ここで作成される液体薄膜の膜厚は
先に測定した空気薄膜の膜厚とほぼ同一な膜厚を持って
おり、液体薄膜を透過した光を、分光器8で受光し、液
体薄膜の光学特性を測定することができる。The thickness of the liquid thin film formed here is approximately the same as the thickness of the air thin film previously measured, and the light transmitted through the liquid thin film is received by the spectroscope 8. The optical characteristics of the liquid thin film can be measured.
【0017】実際の測定では、前もって参照光として水
や溶剤等の無色透明な液体の薄膜の透過光を測定してお
き、この透過光を参照光として透過率を求めている。In actual measurement, the transmitted light of a thin film of a colorless and transparent liquid such as water or a solvent is measured in advance as the reference light, and the transmittance is obtained using this transmitted light as the reference light.
【0018】液体薄膜の測定が終了すると、可動シリン
ダ6を用いて凸部材1と凹部材2との隙間を、液体が侵
入できる程度に広げた後、洗浄用液体を流し、測定セル
及びハウジング内9を清掃し、エアー等を用いてセル及
びハウジング9内を乾燥させる。また、ここでは透過光
測定の実施例を示したが、反射光の測定も可能である
(図示せず)。After the measurement of the liquid thin film is completed, the movable cylinder 6 is used to widen the gap between the convex member 1 and the concave member 2 to such an extent that the liquid can enter, and then the cleaning liquid is flowed to the inside of the measuring cell and the housing. 9 is cleaned and the inside of the cell and the housing 9 is dried using air or the like. Although the example of transmitted light measurement is shown here, reflected light can also be measured (not shown).
【0019】測定された透過光または透過率は、先に測
定された膜厚と設定値との差によってランバートベール
の法則を用いて補正を施され、より高精度な光学特性が
算出される。以上、手順をまとめると図3に示したフロ
ーチャートのようになる。The measured transmitted light or transmittance is corrected by using the Lambert-Beer's law based on the difference between the previously measured film thickness and the set value, and more accurate optical characteristics are calculated. The procedure is summarized as shown in the flowchart of FIG.
【0020】ここで、補正方法は着色液体の特性によっ
て異なり、散乱性(隠蔽性)のほとんどない液体に対して
はランバートベールの法則を用いて補正を行ない、散乱
性(隠蔽性)が存在する液体についてはクベルカ‐ムンク
の理論式を用いて補正を行なうことができる。ランバー
トベールの法則適用時には、補正は以下の式で行なわれ
る。Here, the correction method differs depending on the characteristics of the colored liquid, and the liquid having almost no scattering property (concealing property) is corrected by using Lambert-Beer's law, and the scattering property (concealing property) exists. For liquids, the correction can be performed using the Kubelka-Munk theoretical formula. When Lambert-Beer's law is applied, the correction is performed by the following equation.
【0021】[0021]
【数2】 [Equation 2]
【0022】ここで、Tは実際に測定された分光透過率
分布、dはその際の膜厚、T0は補正された透過率分
布、d0は設定及び設計膜厚、cは着色液体濃度、kは
着色液体特有の定数である。Where T is the actually measured spectral transmittance distribution, d is the film thickness at that time, T 0 is the corrected transmittance distribution, d 0 is the set and designed film thickness, and c is the concentration of the colored liquid. , K are constants peculiar to the colored liquid.
【0023】また、クベルカムンクの理論式適用時に
は、補正は以下の式で行なわれる。When the Kubelka-Munk theoretical formula is applied, the correction is performed by the following formula.
【数3】 [Equation 3]
【0024】ここで、Tは実際に測定された分光透過率
分布、dはその際の膜厚、d0は設定及び設計膜厚、T0
は補正された透過率分布であり、Rは実際に測定された
分光反射率分布、R0は補正された反射率分布、Rgは着
色液体薄膜の基盤の反射率、R∞は着色液体膜厚が十分
に厚い時(透過率が0)の反射率、kは着色液体特有の
定数である。また、R∞はインキ膜厚が十分に厚いセル
を用いて測定するか、既存のセルでインキ膜が十分な厚
さがあるときに測定しておく必要があり、R gは基盤の
分光反射率であるので着色液体が導入される前に測定し
ておく必要がある。Where T is the actually measured spectral transmittance
Distribution, d is the film thickness at that time, d0Is the setting and design film thickness, T0
Is the corrected transmittance distribution and R is the actual measured
Spectral reflectance distribution, R0Is the corrected reflectance distribution, RgWear
The reflectance of the base of the colored liquid thin film, R∞, is sufficient for the colored liquid film thickness.
When the thickness is extremely thick (transmission is 0), k is peculiar to the colored liquid
It is a constant. R∞ is a cell with a sufficiently thick ink film.
Or the ink film is thick enough in the existing cell.
It is necessary to measure when there is time, R gIs the base
The spectral reflectance is measured before the colored liquid is introduced.
Need to be kept.
【0025】図4及び図5に、本発明の液体測色方法を
用いた際の結果を示す。着色液体としては濃度を薄めた
グラビアインキを用い、同一インキの測定を回数20回
行ない、補正方法はランバートベールの法則を用いた。
補正効果を評価する指標にはCIELAB色空間におい
て以下の式で表される色差ΔEを用いた。4 and 5 show the results when the liquid colorimetric method of the present invention is used. A gravure ink with a reduced concentration was used as the coloring liquid, the same ink was measured 20 times, and the Lambert-Beer law was used as the correction method.
As an index for evaluating the correction effect, the color difference ΔE represented by the following formula in the CIELAB color space was used.
【0026】[0026]
【数4】 [Equation 4]
【0027】結果より、特に補正を施さない場合は膜厚
が徐々に厚くなり、その色差もより大きくなってきてい
るが、補正が施されることによって色差の変動幅が非常
に小さくなっていることがわかる。つまり、膜厚差の補
正により大きく精度を向上させることが確認できる。こ
こでは、同一の着色液体を用いて繰返し測定を行ない、
補正の効果を検証したが、これは種々の特性の着色液体
を用いた場合にも有効である。From the results, when no correction is made, the film thickness gradually increases and the color difference also becomes larger. However, the correction makes the variation range of the color difference very small. I understand. That is, it can be confirmed that the accuracy is greatly improved by correcting the film thickness difference. Here, repeated measurement is performed using the same colored liquid,
The effect of correction was verified, but this is also effective when using colored liquids with various characteristics.
【0028】次に、本発明の別の実施例について詳細に
説明する。図2は本発明にかかる液体測色方法を実施す
る液体測色装置の別の実施例の全体構成図である。測定
用セルは、石英ガラスやサファイアガラス等の透明な材
料から構成されており、第1平面部材11及び第2平面
部材12はそれぞれ底部材13及び底部材14に設置さ
れており、底部材13は上下方向に進退可能な駆動軸1
5を有する駆動部16に連結され、周囲部が側壁部材1
9の内周部に沿って上下方向に可動可能であり、かつ第
1平面部材11及び第2平面部材12は対向しつつ、平
行に保持されている。また、駆動部16は適当な可動域
があり、その間のさまざまな膜厚の間隙を形成すること
ができる。Next, another embodiment of the present invention will be described in detail. FIG. 2 is an overall configuration diagram of another embodiment of a liquid colorimetric apparatus that implements the liquid colorimetric method according to the present invention. The measuring cell is made of a transparent material such as quartz glass or sapphire glass. The first plane member 11 and the second plane member 12 are installed on the bottom member 13 and the bottom member 14, respectively, and the bottom member 13 is provided. Is a drive shaft 1 that can move up and down.
5 is connected to a driving unit 16 having a side wall member 1 at its periphery.
It is movable in the vertical direction along the inner peripheral portion of 9, and the first flat member 11 and the second flat member 12 are held in parallel while facing each other. Further, the driving unit 16 has an appropriate range of motion, and gaps of various thicknesses can be formed between them.
【0029】次にこの装置を用いた場合の実施の動作に
ついて説明する。まず、着色液体を注入せずに、設定膜
厚の空気薄膜を形成する。光源のハロゲンランプからの
光をライトガイド17で空気薄膜に対しほぼ垂直に光を
照射する。空気薄膜を透過した光は分光器18で受光さ
れ、波長毎の強度(スペクトル強度)を得る。Next, the operation of the embodiment using this device will be described. First, an air thin film having a set film thickness is formed without injecting the colored liquid. The light from the halogen lamp of the light source is irradiated by the light guide 17 almost perpendicularly to the thin air film. The light transmitted through the air thin film is received by the spectroscope 18, and the intensity (spectral intensity) for each wavelength is obtained.
【0030】このスペクトル強度分布はこの空気薄膜の
膜厚に応じた分布をしているため、前述したPV法を適
用して、スペクトル分布から薄膜の膜厚を算出すること
ができるため、この空気薄膜の膜厚を算出する。この一
連の作業を設定した異なる複数の膜厚すべてで測定を行
ない、この空気薄膜の膜厚データとして記憶しておく。Since this spectral intensity distribution has a distribution corresponding to the film thickness of the air thin film, the film thickness of the thin film can be calculated from the spectral distribution by applying the PV method described above. Calculate the film thickness of the thin film. This series of operations is performed for all of the plurality of different set film thicknesses and stored as the film thickness data of this air thin film.
【0031】その後再び第1平面部材11と第2平面部
材12間の距離を広げ、被測定着色液体を注入し、設定
膜厚の液体薄膜を形成し、光源のハロゲンランプからの
光をライトガイド17で液体薄膜に対しほぼ垂直に光を
照射する。液体薄膜を透過した光を分光器18で受光
し、液体薄膜の測定結果を得る。さらに、異なる複数の
設定膜厚の液体薄膜を形成し、同様の工程を経て液体薄
膜の測定データを得る。この時、設定膜厚は、空気膜厚
の設定膜厚と同一の膜厚とする。After that, the distance between the first flat member 11 and the second flat member 12 is increased again, the colored liquid to be measured is injected, a liquid thin film having a set film thickness is formed, and light from the halogen lamp of the light source is light-guided. At 17, the liquid thin film is irradiated with light almost vertically. The light transmitted through the liquid thin film is received by the spectroscope 18, and the measurement result of the liquid thin film is obtained. Further, liquid thin films having different set film thicknesses are formed, and the measurement data of the liquid thin film is obtained through the same steps. At this time, the set film thickness is the same as the set film thickness of the air film thickness.
【0032】実際の測定では、前もって参照光として水
や溶剤等の無色透明な液体の薄膜の透過光を測定してお
き、この参照光データを元に透過率を求める。液体薄膜
の測定が終了すると、可動シリンダを用いて第1平面部
材11及び第2平面部材12との間隙を、液体が侵入で
きる程度に広げた後、洗浄用液体を流し、測定セル及び
ハウジング内を清掃し、エアー等を用いてセル及びハウ
ジング内を乾燥させる。In the actual measurement, the transmitted light of a thin film of a colorless and transparent liquid such as water or a solvent is previously measured as the reference light, and the transmittance is obtained based on this reference light data. When the measurement of the liquid thin film is completed, the movable cylinder is used to widen the gap between the first flat member 11 and the second flat member 12 to such an extent that the liquid can enter, and then the cleaning liquid is flowed to the inside of the measurement cell and the housing. And dry the inside of the cell and housing with air or the like.
【0033】測定された透過光または透過率データは、
先に測定された膜厚データと設定膜厚値データとの差に
よって各々に前述した数2または数3を用いて補正を施
し、より高精度な光学特性データが算出可能となる。ま
た、ここでは透過光測定の実施例を示したが、反射光の
測定も可能である(図示せず)。The measured transmitted light or transmittance data is
By using the difference between the previously measured film thickness data and the set film thickness value data, the correction is performed using the above-described Equation 2 or Equation 3, and more accurate optical characteristic data can be calculated. Further, although an example of transmitted light measurement is shown here, reflected light can also be measured (not shown).
【0034】[0034]
【発明の効果】上記本発明によれば、被測定着色液体を
測定する前に、空気薄膜を形成して、あらかじめ真の膜
厚を測定し、その後インキ等の被測定着色液体の薄膜を
形成して光学特性を測定し、次に測定された真の膜厚と
設定値の膜厚との差を計算し、得られた膜厚差に応じて
被測定着色液体の光学特性データに対して補正を施すこ
とで、より精度の高い光学特性を得る液体測色方法を提
供できる。According to the present invention, the air thin film is formed before the measurement of the colored liquid to be measured, the true film thickness is measured in advance, and then the thin film of the colored liquid to be measured such as ink is formed. Then, the optical characteristics are measured, then the difference between the measured true film thickness and the film thickness of the set value is calculated, and the optical property data of the colored liquid to be measured is calculated according to the obtained film thickness difference. By performing the correction, it is possible to provide a liquid colorimetric method that obtains more accurate optical characteristics.
【0035】また、これらの工程を繰り返すことで、複
数のインキを順次測定することが可能となり、繰返し測
定でセルに汚れが付着しインキ薄膜の膜厚が変化した際
にも、補正により高精度に測定する液体測色方法を提供
できる。By repeating these steps, it is possible to measure a plurality of inks one after another, and even when stains adhere to the cells and the film thickness of the ink thin film changes due to repeated measurement, high accuracy can be obtained by correction. It is possible to provide a liquid colorimetric method for measuring.
【0036】また、インキ等の着色液体の製造、調整シ
ステムや印刷機のインキ供給システム等の被測定液体源
に直接組み込んで被測定液体の光学特性をリアルタイム
にしかも高精度に測定する液体測色方法を提供できる。Liquid colorimetry for directly measuring the optical characteristics of the liquid to be measured in real time by directly incorporating it into a liquid source to be measured such as a system for manufacturing and adjusting colored liquids such as ink and an ink supply system of a printing machine. A method can be provided.
【図1】本発明にかかる液体測色方法を実施する液体測
色装置の一実施例の全体構成図である。FIG. 1 is an overall configuration diagram of an embodiment of a liquid colorimetric apparatus that implements a liquid colorimetric method according to the present invention.
【図2】本発明にかかる液体測色方法を実施する液体測
色装置の別の実施例の全体構成図である。FIG. 2 is an overall configuration diagram of another embodiment of a liquid colorimetric apparatus that implements the liquid colorimetric method according to the present invention.
【図3】本発明にかかる液体測色方法の処理手順を説明
するためのフローチャートである。FIG. 3 is a flowchart for explaining a processing procedure of a liquid colorimetric method according to the present invention.
【図4】同一インキを繰返し測定した際の補正前と補正
後を比較した色差のグラフである。FIG. 4 is a graph of color difference comparing before and after correction when the same ink is repeatedly measured.
【図5】同一インキを繰返し測定した際のセル膜厚推移
を示したグラフである。FIG. 5 is a graph showing changes in cell film thickness when the same ink is repeatedly measured.
1・・・測定用セル凸部材 2・・・測定用セル凹部材 3・・・可動ロット部と一体化した部材 4・・・セル受け板 5・・・可動ロット部 6・・・可動シリンダ 7・・・ライトガイド(光源) 8・・・分光器 9・・・ハウジング部 10・・・測定用セルの前進端位置を規制する当接部 11・・・第1平面部材 12・・・第2平面部材 13・・・底部材(第1平面部材用) 14・・・底部材(第2平面部材用) 15・・・駆動軸 16・・・駆動部 17・・・ライトガイド(光源) 18・・・分光器 19・・・側壁部材 1 ... Measuring cell convex member 2 ... Measuring cell recess material 3 ... Member integrated with movable lot unit 4 ... Cell support plate 5: Movable lot unit 6 ... Movable cylinder 7: Light guide (light source) 8 ... Spectrometer 9 ... Housing part 10 ... A contact part that regulates the forward end position of the measuring cell 11 ... First plane member 12 ... Second plane member 13 ... Bottom member (for first flat member) 14 ... Bottom member (for second plane member) 15 ... Drive shaft 16 ... Drive unit 17 ... Light guide (light source) 18-spectrometer 19 ... Side wall member
───────────────────────────────────────────────────── フロントページの続き (72)発明者 稲村 崇 東京都台東区台東1丁目5番1号 凸版印 刷株式会社内 Fターム(参考) 2F065 AA30 CC00 FF46 GG03 HH03 HH13 LL01 2G020 AA08 DA05 DA12 DA15 DA23 DA24 DA34 DA62 2G057 AA01 AA02 AB06 AB07 AC01 BA01 BB01 BB02 BD08 JA03 2G059 AA05 BB04 DD13 EE01 EE02 EE12 EE13 FF08 GG10 HH02 HH06 JJ01 JJ17 KK01 MM01 MM14 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Takashi Inamura 1-5-1 Taito, Taito-ku, Tokyo Toppan stamp Imprint Co., Ltd. F term (reference) 2F065 AA30 CC00 FF46 GG03 HH03 HH13 LL01 2G020 AA08 DA05 DA12 DA15 DA23 DA24 DA34 DA62 2G057 AA01 AA02 AB06 AB07 AC01 BA01 BB01 BB02 BD08 JA03 2G059 AA05 BB04 DD13 EE01 EE02 EE12 EE13 FF08 GG10 HH02 HH06 JJ01 JJ17 KK01 MM01 MM14
Claims (4)
あって、透明な平面部を有し、該平面部が略平行に対向
配置された第1及び第2部材間に空気を導入し、該第1
及び第2部材間を規定間隔の間隙にする空気薄膜形成工
程と、前記空気薄膜領域に光源から光を照射し、前記空
気薄膜領域を透過及び/又は反射する、透過光及び/又
は反射光を分光測定する空気薄膜分光測定工程と、前記
空気薄膜分光測定工程で得られた分光スペクトル強度を
用いて空気薄膜の膜厚値を算出する空気膜厚算出工程
と、前記第1及び第2部材間に着色液体を導入し、該第
1及び第2部材間を規定間隔の間隙にする液体薄膜形成
工程と、前記着色液体の薄膜形成領域に光源から光を照
射し、前記着色液体薄膜形成領域を透過及び/又は反射
する、透過光及び/又は反射光を分光センサにより検出
して着色液体の光学特性を測定する液体薄膜分光測定工
程と、前記空気膜厚算出工程で得られた空気薄膜の膜厚
値と液体薄膜形成工程で設定した液体薄膜の膜厚値より
膜厚差を算出し、その膜厚差に応じて測定した液体薄膜
の光学特性を補正する補正工程と、を含んでいることを
特徴とする液体測色方法。1. A liquid colorimetry method for colorimetric measurement of a colored liquid, comprising air between a first member and a second member having a transparent flat surface portion, and the flat surface portions being arranged substantially parallel to each other. Introduced the first
And a step of forming an air thin film between the second members with a predetermined gap, and irradiating the air thin film region with light from a light source to transmit and / or reflect the air thin film region. An air thin film spectroscopic measurement step of performing a spectroscopic measurement, an air film thickness calculation step of calculating a film thickness value of the air thin film using the spectral spectral intensity obtained in the air thin film spectroscopic measurement step, and between the first and second members A liquid thin film forming step of introducing a colored liquid into the first and second members to form a gap having a prescribed interval, and irradiating light from a light source to the thin film forming region of the colored liquid to form the colored liquid thin film forming region. Liquid thin film spectroscopic measurement step of measuring transmitted and / or reflected transmitted light and / or reflected light by a spectroscopic sensor to measure the optical characteristics of the colored liquid, and a film of the air thin film obtained in the air film thickness calculation step Thickness and liquid thin film formation A liquid colorimetry, which comprises a correction step of calculating a film thickness difference from the film thickness value of the liquid thin film set in, and correcting optical characteristics of the liquid thin film measured according to the film thickness difference. Method.
あって、透明な平面部を有し、該平面部が略平行に対向
配置された第1及び第2部材間に空気を導入し、該第1
及び第2部材間を複数に変化させた間隙を形成する空気
薄膜形成工程と、前記複数形成された空気薄膜毎の領域
に光源から光を照射し、前記空気薄膜領域を透過及び/
又は反射する、透過光及び/又は反射光を分光測定する
空気薄膜分光測定工程と、前記空気薄膜分光測定工程で
得られた複数の分光スペクトル強度を用いて複数の空気
薄膜の膜厚値を算出する空気膜厚算出工程と、前記第1
及び第2部材間に着色液体を導入し、該第1及び第2部
材間の間隙を前記空気薄膜形成工程と同じ複数の間隙に
形成する液体薄膜形成工程と、前記着色液体の複数形成
された薄膜毎の領域に光源から光を照射し、前記着色液
体薄膜形成領域を透過及び/又は反射する、透過光及び
/又は反射光を分光センサにより検出して着色液体の光
学特性を測定する液体薄膜分光測定工程と、前記空気膜
厚算出工程で得られた空気薄膜の各膜厚値と液体薄膜形
成工程で設定した液体薄膜の各膜厚値より膜厚差を算出
し、その膜厚差に応じて測定した液体薄膜の光学特性を
補正する補正工程と、を含んでいることを特徴とする液
体測色方法。2. A liquid colorimetry method for colorimetric measurement of a colored liquid, comprising air between first and second members having a transparent flat surface portion and the flat surface portions facing each other substantially in parallel. Introduced the first
And an air thin film forming step of forming a plurality of gaps between the second members, and irradiating light from a light source to each of the plurality of formed air thin films to transmit and / or pass through the air thin film region.
Alternatively, the film thickness value of a plurality of air thin films is calculated using the air thin film spectroscopic measurement step of spectroscopically measuring transmitted light and / or reflected light that is reflected and a plurality of spectral spectral intensities obtained in the air thin film spectroscopic measurement step. Air film thickness calculation step, and the first
A liquid thin film forming step of introducing a colored liquid between the first and second members to form a gap between the first and second members in the same plurality of gaps as the air thin film forming step; and a plurality of the colored liquids are formed. A liquid thin film for irradiating a region of each thin film with light from a light source, and transmitting and / or reflecting the colored liquid thin film forming region, and detecting transmitted light and / or reflected light by a spectroscopic sensor to measure optical characteristics of the colored liquid. The film thickness difference is calculated from each film thickness value of the air thin film obtained in the spectroscopic measurement step and the air film thickness calculating step and each film thickness value of the liquid thin film set in the liquid thin film forming step. And a correction step of correcting the optical characteristics of the liquid thin film measured accordingly.
じた補正を施すことを特徴とする請求項1または2に記
載の液体測色方法。3. The liquid colorimetric method according to claim 1, wherein the correction step is a correction according to a scattering characteristic of the colored liquid.
より着色液体の分光特性を算出する液体測色装置。4. A liquid colorimetric apparatus for calculating the spectral characteristic of a colored liquid by the liquid colorimetric method according to claim 1.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007285847A (en) * | 2006-04-17 | 2007-11-01 | Hitachi High-Tech Manufacturing & Service Corp | Spectrophotometer |
JP2008111895A (en) * | 2006-10-30 | 2008-05-15 | Kyocera Mita Corp | Concentration detector and image forming device |
CN101936713A (en) * | 2010-08-19 | 2011-01-05 | 中国航空工业第六一八研究所 | Rib thickness detection method utilizing light transmission color comparison |
-
2001
- 2001-11-21 JP JP2001355839A patent/JP2003156394A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007285847A (en) * | 2006-04-17 | 2007-11-01 | Hitachi High-Tech Manufacturing & Service Corp | Spectrophotometer |
JP2008111895A (en) * | 2006-10-30 | 2008-05-15 | Kyocera Mita Corp | Concentration detector and image forming device |
CN101936713A (en) * | 2010-08-19 | 2011-01-05 | 中国航空工业第六一八研究所 | Rib thickness detection method utilizing light transmission color comparison |
CN101936713B (en) * | 2010-08-19 | 2012-06-20 | 中国航空工业第六一八研究所 | Rib thickness detection method utilizing light transmission color comparison |
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