JP3646494B2

JP3646494B2 - Cell for measuring optical properties of liquid and method for producing the same

Info

Publication number: JP3646494B2
Application number: JP33121597A
Authority: JP
Inventors: 政司郡嶋; 伸一戸沢
Original assignee: Toppan Inc
Current assignee: Toppan Inc
Priority date: 1997-11-14
Filing date: 1997-11-14
Publication date: 2005-05-11
Anticipated expiration: 2017-11-14
Also published as: JPH11148896A

Description

【０００１】
【発明の属する技術分野】
本発明は、光を照射して光学特性を測定する液体を、膜状にして収容する光学特性測定用セルおよびその製造方法に関するものである。
【０００２】
【従来の技術】
塗料、インキ、プラスチックなどの着色溶液の調色プロセスでは着色溶液の色彩を正確に把握することが必要であり、その１つの方法として、上記着色溶液に光を照射し、その透過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。この種の測色方法では、測色用セルに着色溶液を収容して測色用セルを通じ光を透過させ、透過光をセンサで検知して着色溶液の分光透過率を測定する。
【０００３】
ここで測色用セルとしては例えば図５、図６に示したようなものを用いることができる。図５は従来の測色用セルの一例を示す側面図、図６は、図５の測色用セルを構成する下部ガラス板を示す平面図である。
この測色用セル１０２は、図５に示したように、上部ガラス板１０４と下部ガラス板１０６とから成り、下部ガラス板１０６の上面には、図６に示したように、周辺部に、周方向で等間隔に４つの突起１０８が形成され、この突起１０８の高さにより上部ガラス板１０４と下部ガラス板１０６との間隔が規定される構造となっている。
【０００４】
そして、測定対象の着色溶液は下部ガラス板１０６の中央部に滴下し、その上に上部ガラス板１０４を被せることで、上部ガラス板１０４と下部ガラス板１０６との間の隙間に着色溶液１１０が膜状に収容された状態となる。この状態で光を上部ガラス板１０４の上方から板面に対しほぼ垂直に入射させ、上部ガラス板１０４、着色溶液１１０、ならびに下部ガラス板１０６を透過した光を下部ガラス板１０６の下方で受光し、分光分析を行う。
【０００５】
【発明が解決しようとする課題】
しかし、このような従来の測色用セル１０２では、着色溶液１１０を下部ガラス板１０６上に滴下して上部ガラス板１０４を被せるとき、余分な着色溶液１１０は上部ガラス板１０４と下部ガラス板１０６との隙間から流出するのみならず、突起１０８の上面上にも着色溶液１１０が乗ってしまう。そのため、突起１０８上面と上部ガラス板１０４の下面との間に着色溶液１１０が介在し、上部ガラス板１０４と下部ガラス板１０６との間隔が変化する結果、着色溶液層の厚みが変化し光の透過率が影響を受けて測定結果が不正確になるとうい問題が発生する。
【０００６】
また、上部ガラス板１０４および下部ガラス板１０６の外周部において着色溶液１１０は空気に接しているため、この箇所で着色溶液１１０の揮発、乾燥が進み、着色溶液１１０の濃度が変化するため、測定精度が低下する。測色用セル１０２に収容されている着色溶液１１０は膜状となっており、極めて微量であるため、外周部での揮発、乾燥であってもその影響は大きい。
【０００７】
本発明はこのような問題を解決するためになされたもので、その目的は、測定対象の液体が溢れることによる膜厚変化、および揮発、乾燥による濃度変化を防止して正確に液体の光学特性を測定できる液体の光学特性測定用セルを提供することにある。
【０００８】
【課題を解決するための手段】
本発明は上記目的を達成するため、光を照射して光学特性を測定する液体を、膜状にして収容する光学特性測定用セルであって、第１の板体が第２の板体の上に載置されることで構成され、前記第１および第２の板体は少なくとも中央部が透明な材料により形成され、前記第１の板体は下面の中央部に凸部を有すると共に、該凸部の周囲の下面に下面側当接部を有し、前記第２の板体は上面の中央部に前記凸部が収容される凹部を有すると共に、該凹部の周囲の上面に上面側当接部を有し、前記凸部の先端面と凹部の底面は平坦面で形成され、前記第２の板体の上に第１の板体を、前記凸部を凹部に収容し、下面側当接部と上面側当接部を当接して載置した状態で、凸部の先端面と凹部の底面との間に均一の高さの隙間が形成されると共に、前記凸部の側面と凹部の側面との間に前記隙間に連通する空間が隙間の周囲に形成されるように構成され、前記空間は、前記凹部に前記液体が滴下された状態で前記凸部が収容されることで前記隙間から溢れた液体を貯留するように構成され、前記第２の板体の上面側当接部の上面に溝が形成されていることを特徴とする。
また、本発明は、前記凹部の側面は、上方に至るに連れて中央部から離れるように外側に傾斜して形成されていることを特徴とする。
また、本発明は、前記凸部および凹部は共に平面視円形に形成されていることを特徴とする。
【００１０】
本発明の液体の光学特性測定用セルでは、第１の板体の凸部の側面と第２の板体の凹部の側面との間に空間が形成されるので、第２の板体の凹部に測定対象の液体を滴下した後、第１の板体を第２の板体上に載置した際、第１の板体の凸部と第２の板体の凹部との間の隙間から溢れた液体は上記空間内に貯留する。したがって、液体は凹部の外に溢れることがなく、従来のように溢れた液体が第１および第２の板体の当接部に介在することで上記隙間の大きさが変化し液体層の厚みが変化してしまうという問題は発生しない。
また、上記空間内には十分な量の液体を貯留させることができるので、空間部分で液体の揮発、乾燥が生じても、上記隙間に収容された液体は影響を直ぐに受けることはなく、したがって、揮発、乾燥の影響が現れる前に測定作業を終了することができる。
【００１１】
【発明の実施の形態】
次に本発明の実施の形態を実施例にもとづき図面を参照して説明する。
図１は第１の板体を第２の板体から離した状態の断面側面図、図２は第１の板体を第２の板体に載置した状態の部分拡大断面図、図３は第２の板体の平面図である。
この液体の光学特性測定用セル２は、光を照射して測色するインキ（本発明に係わる液体）を膜状にして収容するものであって、第１の板体４を第２の板体６上に載置して構成されている。
第１および第２の板体４、６はいずれも石英ガラスにより同一直径で平面視円形に形成されている。
【００１２】
第１の板体４の上面は平坦面で形成され、第１の板体４は下面中央に平面視円形の凸部８を有し、凸部８の周囲に下面側当接部４０２を有している。凸部８の先端面１２は平坦面で形成され、凸部８の側面１８は円筒面で形成され、下面側当接部４０２は環状の平坦面で形成され、先端面１２と下面側当接部４０２と第１の板体４の上面は平行している。
【００１３】
第２の板体６の下面は平坦面で形成され、第２の板体６は上面中央に、前記凸部８が収容される平面視円形の凹部１０を有し、凹部１０の周囲に上面側当接部９を有している。凹部１０の底面１４は平坦面で形成され、凹部１０の側面１９は円筒面で形成され、上面側当接部９は平坦面で形成され、底面１４と上面側当接部９と第２の板体６の下面は平行している。
図３に示したように、上面側当接部９には、凹部１０の側面１９から第２の板体６の外周面に至る４つの溝７（特許請求の範囲の空気抜き路に相当）が等間隔をおいて形成されている。
【００１４】
第１の板体４の凸部８の高さＡ（図１）は、第２の板体６の凹部１０の深さＢより１μｍないし５００μｍ低い。
したがって、図２に示したように、第２の板体６の上に第１の板体４を、凸部８を凹部１０に収容し、下面側当接部９と上面側当接部４０２を当接して載置した状態で、凸部８の先端面１２と凹部１０の底面１４との間に１μｍないし５００μｍ程度の均一の高さの隙間１６が形成される。
また、第２の板体６の凹部１０の直径は、第１の板体４の凸部８の直径より十分に大きく、したがって、図２に示したように第１の板体４を第２の板体６上に載置したとき、第１の板体４の凸部８の側面１８と第２の板体６の凹部１０の側面１９との間に前記隙間１６に連通する環状の空間２０が形成される。
【００１５】
このような構成の光学特性測定用セル２を用いてインキの測色を行う場合は、まず、第１の板体４を第２の板体６から外した状態で、第２の板体６を水平に配置した上で第２の板体６の凹部１０内に測定対象のインキを数滴、滴下する。
そして、図２に示したように、第１の板体４を、凸部８を凹部１０に収容し、下面側当接部９と上面側当接部４０２を当接して第２の板体６の上に載置する。ここで、第１の板体４を第２の板体６上に載置するとき、凹部１０内の空気は上記溝７を通じて円滑に排出される。
【００１６】
これにより、インキ２１は、図２に示したように、凸部８の先端面１２と凹部１０の底面１４との間の隙間１６内に膜状に収容され、一方、この隙間１６の箇所から溢れたインキ２１は、第１の板体４の凸部８の側面１８と第２の板体６の凹部１０の側面１９との間に形成された空間２０内に収容される。
測色は、このようにインキを収容した光学特性測定用セル２に対して、第１の板体４の上方より光を照射して液体の光学特性測定用セル２を透過させ、透過した光を第２の板体６の下方で受光検出することで行う。
【００１７】
したがって、本実施例の光学特性測定用セル２では、インキは凹部１０の外に溢れることがなく、従来のように溢れたインキが第１および第２の板体４、６の当接部に介在することで上記隙間１６の大きさが変化しインキ層の厚みが変化してしまうという問題は発生せず、正確に測色を行うことができる。
また、上記空間２０内には十分な量のインキを貯留させることができるので、空間２０部分でインキの揮発、乾燥が生じても、上記隙間１６に収容されたインキは影響を直ぐに受けることはなく、したがって、揮発、乾燥の影響が現れる前に測定作業を終了することができ、正確な測色が可能である。
【００１８】
以上、本発明について実施例をもとに説明したが、これはあくまでも一例であり、本発明はこの例に限定されることなく種々の形態で実施することができる。例えば、第１および第２の板体４、６の表面に撥水処理を施すことで、光学特性測定用セル２を効率よく洗浄できるよう図ることも有効である。
また、第１および第２の板体４、６は石英ガラスにより形成する以外にも、例えばＢＫ７ガラスにより形成してもよい。
さらに、第２の板体６の凹部１０の側面１８を、図２に２点鎖線Ｗで示したように、外側に傾斜させることで、凹部１０内の洗浄性を高めるように図ることも可能である。
そして、図１に示した第２の板体６の上面側当接部９や溝７を含む凹部１０の周辺部２２をセラミック材料により形成して光学特性測定用セル２を繰り返し使用した場合の摩耗を防止し、光学特性測定用セル２の耐久性を高めることも可能である。
また、第１の板体４の凸部８の箇所においてのみ光が透過すればよいので、第１の板体４における凸部８の周辺の箇所、および第２の板体６における凹部１０の周辺の箇所は不透明な材料により形成してもよい。
さらに、この液体の光学特性測定用セル２による測色は、透過方式のみならず反射方式で行うこともでき、その場合には、第２の板体６の下面側に例えば白色の反射体を配置し、第１の板体４の上方から入射した光をこの反射体で上方に反射させ、第１の板体４の上方で検出すればよい。
【００１９】
このような液体の光学特性測定用セルは、本発明による液体の光学特性測定用セル２の作製方法にもとづき例えば次のような手順で簡単に作製することができる。
図４は本発明の液体の光学特性測定用セルの作製方法の一例を示す工程図であり、各段階における各材料を側方から見た状態を示している。図中、図１ないし図３と同一の要素には同一の符号が付されている。
この液体の光学特性測定用セルの作製方法では、まず、図４の（Ａ）に示したように、石英ガラスまたはＢＫ７ガラスから成る第３、第４、第６の板体２４、２６、３０を用意し、また、セラミック製の第５の板体２８を用意する。
第３、第４、第６の板体２４、２６、３０はいずれも本実施例では上下面が平行な平坦面で平面視円形に形成されている。第５の板体３０は上下面が平行な平坦面で円環状に形成され、その中心に孔が貫通形成され、符号１８はその内周面を示している。第３、第５、第６の板体２４、２８、３０の直径は等しく、第４の板体２６は、その直径が第３、第５、第６の板体２４、２８、３０の直径より小さい。
第５の板体２８の厚みは第４の板体２６の厚みより１μｍないし５００μｍ大きく、また、第５の板体３０の孔の内径は第４の板体２６の直径より大きく、第５の板体３０の上面には周面１８から外周面に至る４つの溝７が周方向で等間隔に形成されている。
【００２０】
そして、図４の（Ｂ）に示したように、第３の板体２４の中央に板面どうしを密着させ第４の板体２６を配置して両板体２４，２６を接合して第１の板体４を形成する。第３および第４の板体２４、２６の接合は、例えば、紫外線により硬化する接着剤を用いたＵＶ接合や、陽極接合の技術によって行うことができる。次に、図４の（Ｃ）に示したように、第６の板体３０上に凹部１０を形成すべく第５の板体２８を配置し接合して第２の板体６を形成する。第５の板体３０と第６の板体２８との接合も、上記第３および第４の板体２４、２６の接合の場合と同様の技術により行うことができる。
このように形成した第２の板体６の上に、上記第１の板体４を、第４の板体２６を下側にし第５の板体２８の内側に収容させた状態で載置することで、図１、図２に示した液体の光学特性測定用セルが完成する。
【００２１】
なお、液体の光学特性測定用セルの作製方法としては、ここで説明した方法以外にも、例えば、石英ガラスなどの透明材料から成る板体を研削加工することで第１および第２の板体４、６を作製することも可能である。その場合には、例えば平面視円形の板体の周辺部を研削して中央部の凸部８を形成することで第１の板体４とし、同じく例えば平面視円形の板体の中央部を研削して凹部１０を形成することで第２の板体６とする。
【００２２】
【発明の効果】
以上説明したように本発明の液体の光学特性測定用セルでは、第１の板体の凸部の側面と第２の板体の凹部の側面との間に空間が形成されているので、第２の板体の凹部に測定対象の液体を滴下した後、第１の板体を第２の板体上に載置した際、第１の板体の凸部と第２の板体の凹部との間の隙間から溢れた液体は上記空間内に貯留する。したがって、液体は凹部の外に溢れることがなく、従来のように溢れた液体が第１および第２の板体の当接部に介在することで上記隙間の大きさが変化し液体層の厚みが変化してしまうという問題は発生せず、液体の光学的特性を正確に測定することができる。
また、上記空間内には十分な量の液体を貯留させることができるので、空間部分で液体の揮発、乾燥が生じても、上記隙間に収容された液体は影響を直ぐに受けることはなく、したがって、揮発、乾燥の影響が現れる前に測定作業を終了することができ、液体の光学的特性を正確に測定することができる。
【図面の簡単な説明】
【図１】第１の板体を第２の板体から離した状態の断面側面図である。
【図２】第１の板体を第２の板体に載置した状態の部分拡大断面図である。
【図３】第２の板体の平面図である。
【図４】本発明の液体の光学特性測定用セルの作製方法の一例を示す工程図である。
【図５】従来の測色用セルの一例を示す側面図である。
【図６】図５の測色用セルを構成する下部ガラス板を示す平面図である。
【符号の説明】
２液体の光学特性測定用セル
４第１の板体
６第２の板体
８凸部
１０凹部
１６隙間
１８、１９側面
２０空間
２４第３の板体
２６第４の板体
２８第５の板体
３０第６の板体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical property measurement cell that contains a liquid for measuring optical properties by irradiating light, and a method for manufacturing the same.
[0002]
[Prior art]
In the toning process of colored solutions such as paints, inks, and plastics, it is necessary to accurately grasp the color of the colored solution. As one method, the colored solution is irradiated with light and the transmitted light is spectroscopically analyzed. There are known methods (for example, JP-A-8-94441). In this type of color measurement method, a color solution is accommodated in a color measurement cell, light is transmitted through the color measurement cell, the transmitted light is detected by a sensor, and the spectral transmittance of the color solution is measured.
[0003]
Here, for example, the cells shown in FIGS. 5 and 6 can be used as the color measuring cells. FIG. 5 is a side view showing an example of a conventional colorimetric cell, and FIG. 6 is a plan view showing a lower glass plate constituting the colorimetric cell of FIG.
As shown in FIG. 5, the color measuring cell 102 is composed of an upper glass plate 104 and a lower glass plate 106. On the upper surface of the lower glass plate 106, as shown in FIG. Four protrusions 108 are formed at equal intervals in the circumferential direction, and the height of the protrusions 108 defines the distance between the upper glass plate 104 and the lower glass plate 106.
[0004]
Then, the colored solution to be measured is dropped on the central portion of the lower glass plate 106, and the upper glass plate 104 is placed thereon, so that the colored solution 110 is placed in the gap between the upper glass plate 104 and the lower glass plate 106. It will be in the state accommodated in the form of a film. In this state, light is incident from above the upper glass plate 104 substantially perpendicularly to the plate surface, and light transmitted through the upper glass plate 104, the coloring solution 110, and the lower glass plate 106 is received below the lower glass plate 106. Perform spectroscopic analysis.
[0005]
[Problems to be solved by the invention]
However, in such a conventional colorimetric cell 102, when the colored solution 110 is dropped onto the lower glass plate 106 and the upper glass plate 104 is covered, the excess colored solution 110 is removed from the upper glass plate 104 and the lower glass plate 106. In addition to flowing out from the gap, the colored solution 110 also gets on the upper surface of the protrusion 108. Therefore, the colored solution 110 is interposed between the upper surface of the protrusion 108 and the lower surface of the upper glass plate 104, and the distance between the upper glass plate 104 and the lower glass plate 106 is changed. A problem arises when the transmittance is affected and the measurement results are inaccurate.
[0006]
In addition, since the colored solution 110 is in contact with air at the outer peripheral portions of the upper glass plate 104 and the lower glass plate 106, volatilization and drying of the colored solution 110 proceeds at this location, and the concentration of the colored solution 110 changes. Accuracy is reduced. The coloring solution 110 accommodated in the colorimetric cell 102 is in the form of a film and is extremely small, so that even if it is volatilized or dried on the outer periphery, the influence is great.
[0007]
The present invention has been made to solve such problems, and its purpose is to prevent changes in film thickness due to overflow of the liquid to be measured, and to prevent changes in concentration due to volatilization and drying, thereby accurately measuring the optical characteristics of the liquid. An object of the present invention is to provide a cell for measuring optical properties of a liquid that can measure the above.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is an optical property measurement cell for storing a liquid for measuring optical properties by irradiating light in the form of a film, wherein the first plate is a second plate. The first and second plate bodies are formed of a transparent material at least in the center, and the first plate body has a convex portion in the center portion of the lower surface. A lower surface side contact portion is provided on a lower surface around the convex portion, and the second plate body has a concave portion in which the convex portion is accommodated in a central portion of the upper surface, and an upper surface side on an upper surface around the concave portion. A front end surface of the convex portion and a bottom surface of the concave portion are formed as flat surfaces, the first plate body is accommodated on the second plate body, the convex portion is accommodated in the concave portion, and the lower surface. While the side contact portion and the upper surface side contact portion are in contact with each other and placed, a gap with a uniform height is formed between the tip surface of the convex portion and the bottom surface of the concave portion, A space communicating with the gap is formed between the side surface of the convex portion and the side surface of the concave portion, and the convex portion is formed in a state where the liquid is dropped into the concave portion. Is stored to store the liquid overflowing from the gap, and a groove is formed on the upper surface of the upper surface side contact portion of the second plate .
Further, the present invention is characterized in that the side surface of the concave portion is formed to be inclined outward so as to move away from the central portion as it extends upward.
Further, the present invention is characterized in that both the convex portion and the concave portion are formed in a circular shape in plan view.
[0010]
In the liquid optical characteristic measuring cell of the present invention, since a space is formed between the side surface of the convex portion of the first plate and the side surface of the concave portion of the second plate, the concave portion of the second plate After dropping the liquid to be measured on the first plate body, when the first plate body is placed on the second plate body, from the gap between the convex portion of the first plate body and the concave portion of the second plate body The overflowing liquid is stored in the space. Therefore, the liquid does not overflow outside the recess, and the overflowed liquid is interposed in the contact portion of the first and second plate bodies as in the conventional case, whereby the size of the gap changes and the thickness of the liquid layer. The problem of changing will not occur.
In addition, since a sufficient amount of liquid can be stored in the space, even if the liquid is volatilized or dried in the space portion, the liquid stored in the gap is not immediately affected. The measurement operation can be completed before the effects of volatilization and drying appear.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described based on examples with reference to the drawings.
1 is a sectional side view of the first plate separated from the second plate, FIG. 2 is a partially enlarged sectional view of the first plate placed on the second plate, FIG. These are top views of a 2nd board.
The liquid optical characteristic measuring cell 2 contains ink (liquid according to the present invention) for color measurement by irradiating light, and contains the first plate 4 as the second plate. It is configured to be placed on the body 6.
Both the first and second plate bodies 4 and 6 are formed of quartz glass with the same diameter and circular in plan view.
[0012]
The upper surface of the first plate body 4 is formed as a flat surface. The first plate body 4 has a convex portion 8 having a circular shape in plan view at the center of the lower surface, and a lower surface side contact portion 402 around the convex portion 8. doing. The front end surface 12 of the convex portion 8 is formed as a flat surface, the side surface 18 of the convex portion 8 is formed as a cylindrical surface, and the lower surface side contact portion 402 is formed as an annular flat surface. The upper surface of the part 402 and the first plate 4 is parallel.
[0013]
The lower surface of the second plate body 6 is formed as a flat surface, and the second plate body 6 has a concave portion 10 in a plan view in which the convex portion 8 is accommodated in the center of the upper surface, and the upper surface around the concave portion 10. A side contact portion 9 is provided. The bottom surface 14 of the recess 10 is formed as a flat surface, the side surface 19 of the recess 10 is formed as a cylindrical surface, the upper surface side contact portion 9 is formed as a flat surface, the bottom surface 14, the upper surface side contact portion 9 and the second surface. The lower surface of the plate body 6 is parallel.
As shown in FIG. 3, the upper surface side contact portion 9 has four grooves 7 (corresponding to the air vent path in the claims) from the side surface 19 of the recess 10 to the outer peripheral surface of the second plate 6. It is formed at equal intervals.
[0014]
The height A (FIG. 1) of the convex portion 8 of the first plate 4 is 1 μm to 500 μm lower than the depth B of the concave 10 of the second plate 6.
Therefore, as shown in FIG. 2, the first plate body 4 is accommodated on the second plate body 6, the convex portion 8 is accommodated in the concave portion 10, and the lower surface side contact portion 9 and the upper surface side contact portion 402. In a state of being placed in contact with each other, a gap 16 having a uniform height of about 1 μm to 500 μm is formed between the tip surface 12 of the convex portion 8 and the bottom surface 14 of the concave portion 10.
Further, the diameter of the concave portion 10 of the second plate body 6 is sufficiently larger than the diameter of the convex portion 8 of the first plate body 4, so that the first plate body 4 is made the second plate as shown in FIG. An annular space communicating with the gap 16 between the side surface 18 of the convex portion 8 of the first plate body 4 and the side surface 19 of the concave portion 10 of the second plate body 6 when placed on the plate body 6. 20 is formed.
[0015]
In the case of performing ink colorimetry using the optical characteristic measuring cell 2 having such a configuration, first, the second plate body 6 with the first plate body 4 removed from the second plate body 6. Are placed horizontally, and several drops of the ink to be measured are dropped into the recess 10 of the second plate 6.
Then, as shown in FIG. 2, the first plate 4 is accommodated in the convex portion 8 in the concave portion 10, and the lower surface side contact portion 9 and the upper surface side contact portion 402 are contacted to form the second plate body. 6 is placed on top. Here, when the first plate 4 is placed on the second plate 6, the air in the recess 10 is smoothly discharged through the groove 7.
[0016]
Thereby, as shown in FIG. 2, the ink 21 is accommodated in a film shape in the gap 16 between the tip surface 12 of the convex portion 8 and the bottom surface 14 of the concave portion 10. The overflowing ink 21 is accommodated in a space 20 formed between the side surface 18 of the convex portion 8 of the first plate body 4 and the side surface 19 of the concave portion 10 of the second plate body 6.
In the colorimetry, the optical characteristic measurement cell 2 containing the ink is irradiated with light from above the first plate 4 and transmitted through the liquid optical characteristic measurement cell 2, and the transmitted light. Is performed by detecting the received light below the second plate 6.
[0017]
Therefore, in the optical characteristic measuring cell 2 of the present embodiment, the ink does not overflow outside the recess 10, and the overflowed ink does not overflow to the contact portions of the first and second plate bodies 4 and 6 as in the prior art. By interposing, the problem that the size of the gap 16 changes and the thickness of the ink layer changes does not occur, and accurate color measurement can be performed.
In addition, since a sufficient amount of ink can be stored in the space 20, even if the ink is volatilized and dried in the space 20, the ink contained in the gap 16 is immediately affected. Therefore, the measurement operation can be completed before the effects of volatilization and drying appear, and accurate color measurement is possible.
[0018]
The present invention has been described based on the embodiments. However, this is merely an example, and the present invention is not limited to this embodiment and can be implemented in various forms. For example, it is also effective to efficiently clean the optical property measuring cell 2 by subjecting the surfaces of the first and second plate bodies 4 and 6 to water repellent treatment.
Further, the first and second plate bodies 4 and 6 may be formed of, for example, BK7 glass in addition to being formed of quartz glass.
Further, the side face 18 of the concave portion 10 of the second plate 6 can be inclined outward as shown by a two-dot chain line W in FIG. It is.
And when the peripheral part 22 of the recessed part 10 containing the upper surface side contact part 9 and the groove | channel 7 of the 2nd board 6 shown in FIG. 1 is formed with a ceramic material, and the cell 2 for optical characteristic measurement is used repeatedly It is also possible to prevent wear and increase the durability of the optical property measuring cell 2.
In addition, since light only needs to pass through at the location of the convex portion 8 of the first plate body 4, the location around the convex portion 8 in the first plate body 4 and the concave portion 10 of the second plate body 6. The peripheral part may be formed of an opaque material.
Furthermore, the color measurement by the liquid optical characteristic measuring cell 2 can be performed not only by the transmission method but also by the reflection method. In this case, for example, a white reflector is provided on the lower surface side of the second plate 6. The light that is disposed and reflected from above the first plate 4 may be reflected upward by this reflector and detected above the first plate 4.
[0019]
Such a liquid optical property measuring cell can be easily manufactured, for example, by the following procedure based on the manufacturing method of the liquid optical property measuring cell 2 according to the present invention.
FIG. 4 is a process diagram showing an example of a method for producing a cell for measuring optical characteristics of a liquid according to the present invention, and shows a state in which each material at each stage is viewed from the side. In the figure, the same elements as those in FIGS. 1 to 3 are denoted by the same reference numerals.
In this method of manufacturing a cell for measuring optical characteristics of liquid, first, as shown in FIG. 4A, third, fourth, and sixth plates 24, 26, and 30 made of quartz glass or BK7 glass are used. And a fifth plate 28 made of ceramic is prepared.
In the present embodiment, the third, fourth, and sixth plate bodies 24, 26, and 30 are all flat surfaces having parallel upper and lower surfaces and formed in a circular shape in plan view. The fifth plate body 30 is formed in an annular shape with flat surfaces whose upper and lower surfaces are parallel, and a hole is formed through the center thereof. Reference numeral 18 denotes an inner peripheral surface thereof. The diameters of the third, fifth, and sixth plate bodies 24, 28, and 30 are equal, and the fourth plate body 26 has a diameter of the third, fifth, and sixth plate bodies 24, 28, and 30. Smaller than.
The thickness of the fifth plate 28 is 1 μm to 500 μm larger than the thickness of the fourth plate 26, and the inner diameter of the hole of the fifth plate 30 is larger than the diameter of the fourth plate 26, Four grooves 7 extending from the circumferential surface 18 to the outer circumferential surface are formed at equal intervals in the circumferential direction on the upper surface of the plate body 30.
[0020]
Then, as shown in FIG. 4B, the plate surfaces are brought into close contact with the center of the third plate body 24, the fourth plate body 26 is arranged, and both the plate bodies 24, 26 are joined together. 1 plate body 4 is formed. The third and fourth plate bodies 24 and 26 can be joined by, for example, UV joining using an adhesive that is cured by ultraviolet rays or anodic joining. Next, as shown in FIG. 4C, the fifth plate 28 is disposed and bonded to form the second plate 6 to form the recess 10 on the sixth plate 30. . The fifth plate 30 and the sixth plate 28 can be joined by the same technique as in the case of joining the third and fourth plates 24 and 26.
The first plate body 4 is placed on the second plate body 6 thus formed in a state where the first plate body 4 is housed inside the fifth plate body 28 with the fourth plate body 26 facing down. As a result, the cell for measuring optical characteristics of the liquid shown in FIGS. 1 and 2 is completed.
[0021]
In addition to the method described here, the liquid optical property measurement cell can be produced by grinding a plate made of a transparent material such as quartz glass, for example. 4, 6 can also be produced. In that case, for example, the peripheral portion of the circular plate body in plan view is ground to form the central convex portion 8 to form the first plate body 4. The second plate 6 is formed by forming the recess 10 by grinding.
[0022]
【The invention's effect】
As described above, in the cell for measuring optical characteristics of a liquid according to the present invention, a space is formed between the side surface of the convex portion of the first plate body and the side surface of the concave portion of the second plate body. After dropping the liquid to be measured into the concave portion of the second plate body, when the first plate body is placed on the second plate body, the convex portion of the first plate body and the concave portion of the second plate body The liquid overflowing from the gap between the two is stored in the space. Therefore, the liquid does not overflow outside the recess, and the overflowed liquid is interposed in the contact portion of the first and second plate bodies as in the conventional case, whereby the size of the gap changes and the thickness of the liquid layer. Does not occur, and the optical characteristics of the liquid can be accurately measured.
In addition, since a sufficient amount of liquid can be stored in the space, even if the liquid is volatilized or dried in the space portion, the liquid stored in the gap is not immediately affected. The measurement operation can be completed before the effects of volatilization and drying appear, and the optical properties of the liquid can be accurately measured.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view of a state in which a first plate is separated from a second plate.
FIG. 2 is a partially enlarged cross-sectional view of a state in which a first plate is placed on a second plate.
FIG. 3 is a plan view of a second plate.
FIG. 4 is a process diagram showing an example of a method for producing a cell for measuring optical characteristics of a liquid according to the present invention.
FIG. 5 is a side view showing an example of a conventional colorimetric cell.
6 is a plan view showing a lower glass plate constituting the color measurement cell of FIG. 5. FIG.
[Explanation of symbols]
2 Cell for measuring optical characteristics of liquid 4 First plate body 6 Second plate body 8 Convex portion 10 Concave portion 16 Clearance 18, 19 Side surface 20 Space 24 Third plate body 26 Fourth plate body 28 Fifth plate Body 30 sixth plate

Claims

A liquid for measuring optical characteristics by irradiating light and containing a liquid in a film shape,
The first plate is configured by being placed on the second plate,
The first and second plate bodies are formed of a material having at least a central portion transparent,
The first plate has a convex portion at the center of the lower surface, and has a lower surface side abutting portion on the lower surface around the convex portion,
The second plate body has a concave portion in which the convex portion is accommodated in a central portion of the upper surface, and an upper surface side contact portion on the upper surface around the concave portion,
The tip surface of the convex portion and the bottom surface of the concave portion are formed as flat surfaces,
The first plate body is placed on the second plate body, the protrusion is accommodated in the recess, and the lower end side contact portion and the upper surface side contact portion are in contact with each other, and the tip of the projection A gap having a uniform height is formed between the surface and the bottom surface of the recess, and a space communicating with the gap is formed around the gap between the side surface of the projection and the side surface of the recess. Configured,
The space is configured to store the liquid overflowing from the gap by accommodating the convex portion in a state where the liquid is dropped into the concave portion ,
A groove is formed on the upper surface of the upper surface side contact portion of the second plate body,
A cell for measuring the optical properties of a liquid.

2. The cell for measuring optical characteristics of a liquid according to claim 1, wherein a side surface of the concave portion is formed to be inclined outward so as to move away from the central portion as it goes upward.

The cell for measuring optical characteristics of a liquid according to claim 1, wherein both the convex part and the concave part are formed in a circular shape in plan view.