JPS61130857A - Decision for gloss of object surface - Google Patents
Decision for gloss of object surfaceInfo
- Publication number
- JPS61130857A JPS61130857A JP59253529A JP25352984A JPS61130857A JP S61130857 A JPS61130857 A JP S61130857A JP 59253529 A JP59253529 A JP 59253529A JP 25352984 A JP25352984 A JP 25352984A JP S61130857 A JPS61130857 A JP S61130857A
- Authority
- JP
- Japan
- Prior art keywords
- glossiness
- gloss
- curve
- measured
- visual
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/303—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces using photoelectric detection means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/57—Measuring gloss
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N2021/4704—Angular selective
- G01N2021/4711—Multiangle measurement
- G01N2021/4716—Using a ring of sensors, or a combination of diaphragm and sensors; Annular sensor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N2021/555—Measuring total reflection power, i.e. scattering and specular
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N2021/556—Measuring separately scattering and specular
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
【産業上の利用分野１
本発明は、物体表面の光沢度判定方法に係り、特に、鋼
板の表面品質を計測して管理する際に用いるのに好適な
、物体表面の光反射強度分布により、その視感に基づく
光沢度を分類、等級付けする物体表面の光沢度判定方法
の改良に関する。
【従来の技術］
物体表面の光沢度を定める方法として、従来より種々の
光反射測定による方法が提案されており、代表的なもの
としては、一定角度で投射した白色光束の正反射強度を
測定する鏡面光沢度による方法、一定角度で投射した白
色光の正反射強度と拡散反射強度の比を用いる対比光沢
度による方法、及び、表面に他の物体を映し、その反射
像のぼけを肉眼で見る鮮明光沢度による方法がある。
【発明が解決しようとする問題点１
しかしながら、前記鏡面光沢度による方法は、広く工業
的に用いられているが、表面粗さの小さい鏡面的対象に
ついて実際と一致しないという欠点を有する。又、前記
対比光沢度による方法は、色の異なる対象に対しても視
感に近い光沢度を与えるという特徴を有するが、これも
又鏡面に近い対象については判定精度が低くなる傾向に
ある。
更に、前記鮮明光沢度による方法は、定量的な表示が得
られないという問題点を有していた。
【発明の目的１
本発明は、前記従来の問題点を［１するべくなされたも
ので、同一色（明度は異なってもよい） １の対
象について、目視光沢度に良く一致し、且つ、鏡面から
粗面までの広い粗度範囲に亘って定量的に光沢度を定め
ることができる物体表面の光沢度判定方法を提供するこ
とを目的とする。
【問題点を解決するための手段】
本発明は、物体表面の光反射強度分布により、その視感
に基づく光沢度を分類、等級付けする物体表面の光沢度
判定方法において、第１図にその要旨を示す如く、被測
定表面プロフィルの高さ分布の分散σが次式の関係
（４πσ／λ１・ ＣａＳＯ３）２≦１・・・（１）（
４πσ／λ２・ ＣＯ２Ｏ３）２≧４・・・（２）を満
足するように波長λ１、λ２、入射角θ１、θ２を設定
して、波長λ１、λ２の２つの光束を入射角θ１、θ２
で投射し、各々の正反射強度１１、Ｉ２及び全反射強度
Ｓ１、Ｓ２を検出し、予め２次元平面（１１／Ｓ１、Ｉ
２／Ｓｚ）上に各目視光沢度の代表点をプロットし、こ
れを滑かに結んで得られる曲線ぶを定めておき、該曲線
１と直交する直線鋼により、任意の被測定物の光沢度を
分別するようにして、前記目的を達成したものである。
又、本発明は、前出第１図に破線で示す如く、更に、任
意、の被測定物の光沢度を、該被測定物の前記２次元平
面上における点Ｐから前記曲１１Ｊ２に下した垂線の足
Ｑの、該曲ｌａｉ上の基準点Ｒからの曲線ぶに沿った距
離により評価するようにして、同じく前記目的を達成し
たものである。
又、本発明の実施態様は、前記各目視光沢度の代表点を
、その重心点として、適切な代表点が容易に求めらるよ
うにしたものである。
（作用１
本発明は、物体、例えば銅板表面の目視光沢度が、平均
粗さ及び平均山間隔の２つの表面粗度パラメータに依存
し、平均粗さのみでは評価できないことにＩ１１目して
なされたものである。
即ち、はぼ同一色の対象物の光沢を決める主要因として
表面粗さがあり、基本的には咳表ｉｉＩ粗さの情報を的
確に把握することにより、光沢度を評価できると考えら
れる。
表面粗さの情報は、概括的には、表面プロフィルの高さ
分布の分散σと、自己相関距離Ｔ（自己相関関数が１／
ｅとなる距離）で表現でき、これらの量と光反射強度分
布には、例えば１９６３年にｐ ｅｒｇａｍｏｎ ｐ
ｒｅｓｓより発行された、Ｐ、Ｂｅｃｋｍａｎｎ とＡ
、 Ｓ ｐｉｚｚｉｃｈｉｎｏ著” Ｔ ｈｅ
ＳＣａｔｔｅｒｉｎ１７ｏｆ ＥＩｅｃｔｒｏＩＩｌ
ａｇｎｅｔｉｃ Ｗａｖｅｓ ｆｒｏｍ Ｒｏｕ
ｇｈＳｕｒｆａＯｅＳ ”に示される如く、一定の関係
がある。
更に、「鉄と鋼、７０巻（１９８４）Ｊの１０９５頁以
降に掲載された、浅野有一部他による、これらの関係の
詳細な検り結果に従えば、前出（１）、（２）式の各範
囲を満すことにより、各々の条件による正反射強度１１
、１２は、粗度パラメータσ及び下と次式の関係にある
。
１ｌ−ｆｔ（σ） ・・・・・・・・・（３
）１２− Ｉ２＜ＣＩ、Ｔ） −・・−・−・
（４）但し、入射光強度を単位強度、全反射率を１とし
ている。
ここで、全反射率を考慮に入れれば、前出（３）、（４
）式（７）＆”辺は、各々、ｒ＋／Ｓ１、Ｉｔ／Ｓ２
（Ｓｔ、８２は、（１）、（２）式の各条件における全
反射強度）に置き換えられ、粗度パラメータσ及びＴの
情報は、■１／Ｓ１、■２／Ｓ２の画情報に確実に含ま
れている。従って、■１／Ｓ１、Ｔ２／Ｓｚの画情報に
より光沢度が決定され、これを定量化することが可能で
ある。
他方、同一種類の材質で目視光沢度が異なる多数のサン
プルについて考えれば、これらを前記の２次元平面（１
＋／Ｓ１、１２／Ｓ２）上にプロットした場合、これら
のサンプルは、例えば第２図に示す如く、その光沢度に
応じて前記２次元平面上で一定の曲５ｉＩｉに沿って連
続的に分布している場合が多い。第２図において、Ｏは
、目視光沢度１のサンプル、ムは、目視光沢度２のサン
プル、口は、目視光沢度３のサンプルをそれぞれ示す。
従って、これらのサンプルの光沢度を（Ｉ１／３１、Ｉ
２／Ｓ２）の２次元表面上で分類する場合、第３図に示
す如く、前記曲線ぶに垂直な直線−により分類する方法
が適切且つ簡便である。
発明者は、この分類をより一般的に行う方法として、次
の方法を考えた。即ち、２次元平面（Ｉ ｌ
＋／Ｓ１、１２／Ｓ２）上に各目視光沢度の代表点をプ
ロットし、これを清かに結んで得られる曲線βを、例え
ば図面上での作図により定める。次いで、任意のサンプ
ルの光沢度を、該サンプルの前記２次元平面上における
点Ｐから曲線ａに下した！！線の足Ｑの曲線ぶ上の基準
点Ｒからの曲ｍｉに沿った距離（あるいはこれに相当す
る量）で評価する。第４図に、目視光沢度１．２．３に
対応してサンプル点を分類した最も簡単な例を示し、第
５図に、これら目視光沢度を更に細かく評価した例を示
す。[Industrial Application Field 1] The present invention relates to a method for determining the glossiness of an object surface, and in particular, it is suitable for measuring and managing the surface quality of a steel plate, and is based on the light reflection intensity distribution of the object surface. This invention relates to an improvement in a method for determining the glossiness of an object's surface by classifying and grading the glossiness based on visual perception. [Prior art] As a method for determining the glossiness of an object's surface, various methods have been proposed in the past based on light reflection measurements.A typical method involves measuring the specular reflection intensity of a white beam projected at a certain angle. A method using specular gloss, which uses the ratio of specular reflection intensity to diffuse reflection intensity of white light projected at a certain angle, and a method using contrast gloss, which uses the ratio of the specular reflection intensity and diffuse reflection intensity of white light projected at a certain angle, and another method that measures the blurring of the reflected image by reflecting another object on the surface and observing it with the naked eye. There is a method that depends on the brightness of the image. Problem 1 to be Solved by the Invention However, although the method based on specular gloss is widely used industrially, it has the drawback that it does not match reality for specular objects with small surface roughness. Further, the method using contrastive glossiness has the characteristic of giving a glossiness close to visual perception even to objects of different colors, but this method also tends to have low determination accuracy for objects that are close to mirror surfaces. Furthermore, the method using the sharp glossiness has a problem in that a quantitative display cannot be obtained. OBJECTIVE OF THE INVENTION 1 The present invention has been made to solve the above-mentioned conventional problems. It is an object of the present invention to provide a method for determining the glossiness of an object surface, which can quantitatively determine the glossiness over a wide roughness range from roughness to roughness. [Means for Solving the Problems] The present invention provides a method for determining the glossiness of an object surface, which classifies and ranks the glossiness based on visual perception, based on the light reflection intensity distribution on the object surface. As shown in the summary, the variance σ of the height distribution of the surface profile to be measured is expressed by the following relationship (4πσ/λ1・CaSO3)2≦1...(1)(
4πσ/λ2・CO2O3)2≧4...The wavelengths λ1 and λ2 and the incident angles θ1 and θ2 are set so as to satisfy (2), and the two light beams with the wavelengths λ1 and λ2 are converted to the incident angles θ1 and θ2.
The specular reflection intensities 11, I2 and the total reflection intensities S1, S2 are detected, and the two-dimensional plane (11/S1, I
2/Sz), plot the representative points of each visual gloss level, define a curve obtained by smoothly connecting these points, and use a straight line perpendicular to curve 1 to measure the gloss of any object to be measured. The above purpose is achieved by sorting the degree. Furthermore, as shown by the broken line in FIG. The above objective is also achieved by evaluating the distance of the leg Q of the perpendicular line from the reference point R on the curve lai along the curve. Further, in an embodiment of the present invention, an appropriate representative point can be easily obtained by using the representative point of each visual gloss level as its center of gravity. (Effect 1) The present invention is based on the fact that the visual gloss of the surface of an object, for example, a copper plate, depends on two surface roughness parameters, the average roughness and the average peak interval, and cannot be evaluated based on the average roughness alone. In other words, surface roughness is the main factor that determines the gloss of objects of the same color, and basically, the degree of gloss can be evaluated by accurately understanding the roughness information. Generally speaking, surface roughness information can be obtained from the variance σ of the height distribution of the surface profile and the autocorrelation distance T (where the autocorrelation function is 1/
For example, in 1963, pergamon p
Published by P. Beckmann and A. res.
, written by S pizzichino” The he
SCatterin17ofEIelectroIIl
agnetic Waves from Rou
There is a certain relationship as shown in ``GhSurfaOeS''.Furthermore, the results of detailed examination of these relationships by Yuichi Asano et al. Accordingly, by satisfying each range of equations (1) and (2) above, the specular reflection intensity 11 under each condition is
, 12 have a relationship with the roughness parameter σ and the following equation. 1l-ft(σ) ・・・・・・・・・(3
)12- I2<CI, T) -・・−・−・
(4) However, the incident light intensity is unit intensity and the total reflectance is 1. Here, if the total reflectance is taken into account, the above (3) and (4)
) Equation (7)&'' sides are r+/S1 and It/S2, respectively.
(St, 82 is the total reflection intensity under each condition of equations (1) and (2)), and the information on the roughness parameters σ and T is guaranteed to be the image information of ■1/S1 and ■2/S2. included in. Therefore, the glossiness is determined by the image information of 1/S1 and T2/Sz, and it is possible to quantify this. On the other hand, if we consider a large number of samples of the same type of material with different visual gloss levels, we can plot them on the two-dimensional plane (1
+/S1, 12/S2), these samples are continuously distributed along a certain curve 5iIi on the two-dimensional plane according to their glossiness, as shown in FIG. in many cases. In FIG. 2, O indicates a sample with a visual gloss level of 1, M indicates a sample with a visual gloss level of 2, and ``Open'' indicates a sample with a visual gloss level of 3. Therefore, the glossiness of these samples is (I1/31, I
When classifying on the two-dimensional surface of 2/S2), it is appropriate and simple to classify using straight lines perpendicular to the curved lines, as shown in FIG. The inventor considered the following method as a method for performing this classification more generally. That is, the two-dimensional plane (I l
+/S1, 12/S2), the representative points of each visual glossiness are plotted, and the curve β obtained by clearly connecting these points is determined, for example, by drawing on a drawing. Next, the glossiness of an arbitrary sample was determined from point P on the two-dimensional plane of the sample to curve a! ! The evaluation is based on the distance along the curve mi (or an amount equivalent to this) from the reference point R on the curve of the line foot Q. FIG. 4 shows the simplest example in which sample points are classified according to visual gloss levels of 1.2.3, and FIG. 5 shows an example in which these visual gloss levels are evaluated in more detail.
以下、本発明によりステンレス鋼板の光沢度の評価を行
った実施例を詳細に説明する。
本実施例は、従来から行われている目視判断による光沢
度判定（光沢度１〜４の４段階）を、光反射強度１１．
１２の測定による自助判定に冒き換える目的で、自動判
定の性能を試験するために行ったものである。
ここで扱うステンレス鋼板の表面粗さパラメータσは、
０．０２〜０．２μ鍋であり、使用する光束としてλ−
０．４５７μ層のＡｒレーザ光を用いれば、入射角θ−
７５°で、前出（１）式を満足することができ、又、入
射角θ−１０°で前出（２）式を満足することができる
。又、ここで扱うステンレス鋼板の場合、全反射率はほ
ぼ一定であり、光沢評価に用いる２次元平面（１＋ ／
Ｓ１、Ｉ≧／Ｓ２）は、（１１、Ｉｔ）と等価である
。
第６図に、本実施例による判定の結果を示す。
各サンプルは、熟練した複数の判定者の、様準サンプル
との比較による目視判定により光沢度１〜４の４段階に
分類された。第６図において、○、ム、口、・は、それ
ぞれ光沢度１．２．３．４のサンプルを示す。
他方、これらのサンプルにつき、前記正反射強度Ｉ１、
Ｉ２を測定し、各光沢度に属するサンプルについて、（
ＩＩ、１２）２次元平面上での代表点（本実施例では重
心点）０１〜Ｃ４を定めた後、これらを図面上で滑かに
結んで曲線ぶを描いた。次に、各光沢度毎にサンプルの
分類がなされるように、前記曲線ぶにそれぞれ直交する
適切な境界線ｍａ１１１１ｂ、ｌ１ｌＣを定めた。この
境界線ｍａ、 ｎｉｂ、１１０を定める実用的な方法と
しては、例えば多数のサンプル点をプロットし、各隣接
するグループにつき誤判定となる点数が殻小となるよう
に定めることができる。
前記手順で求めた判定法により、多数のステンレス鋼板
サンプルを自動判定した結果、約９７％のサンプルにつ
いて正しく判定を行うことができ、充分な性能を有する
ことが確認できた。
なお、光沢度判定を更に細かく行う方法として、代表点
Ｃ１、Ｃ２、Ｃ３、Ｃ４の各点の光沢度を１．０．２．
０，３．０１４．０とり、、一方ノ基準点Ｒ３１曲線℃
と境界線ａａの交点Ｔａ、境界線ｌ１ｌｂとの交点Ｔｂ
、境界線ＩＣとの交点Ｔｃ及び他方の基準点Ｒ１３の各
点の光沢度を、それぞれ０．５．１．５．２，５．３．
５．４．５とし、更に、曲線λ上の任意の点の光沢度を
、各区間（０，５〜１．０，１．０〜１．５、・・・４
．０〜４．５）内で、曲線／ａＪ２に沿って比例的に内
挿した値と定めておき、任意のサンプルの光沢度を、２
次元平面（１１、１２）上の対応点Ｐから曲ａｉに下し
た垂線の足Ｑの位置する点の光沢度とすることができる
。
この方法によれば、アナログ的な光沢度判定が可能であ
る。
なお前記実施例は、本発明をステンレス鋼板の光沢度の
評価に適用していたが、本発明の適用範囲はこれに限定
されず、一般の物体表面の光沢度判定にも同様に適用で
きることは明らかである。Examples in which the glossiness of a stainless steel plate was evaluated according to the present invention will be described in detail below. In this embodiment, the conventional visual judgment of glossiness (4 levels of glossiness 1 to 4) was performed with a light reflection intensity of 11.
This test was carried out to test the performance of automatic judgment in order to replace the self-help judgment based on measurement of No. 12. The surface roughness parameter σ of the stainless steel plate treated here is
It is a 0.02-0.2μ pot, and the luminous flux used is λ-
If a 0.457μ layer of Ar laser light is used, the incident angle θ-
When the angle of incidence is 75°, the above equation (1) can be satisfied, and when the incident angle is θ-10°, the above equation (2) can be satisfied. In addition, in the case of the stainless steel plate used here, the total reflectance is almost constant, and the two-dimensional plane used for gloss evaluation (1 + /
S1, I≧/S2) is equivalent to (11, It). FIG. 6 shows the results of determination according to this example. Each sample was classified into four levels of glossiness, 1 to 4, by visual judgment by a plurality of skilled judges in comparison with standard samples. In FIG. 6, ○, mu, mouth, and * indicate samples with a gloss level of 1.2.3.4, respectively. On the other hand, for these samples, the specular reflection intensity I1,
I2 was measured, and for samples belonging to each gloss level, (
II, 12) After determining representative points (center of gravity in this example) 01 to C4 on a two-dimensional plane, these points were smoothly connected on the drawing to draw a curved line. Next, appropriate boundary lines ma1111b and l11C were determined to be perpendicular to the curved lines so that the samples could be classified for each level of gloss. A practical method for determining the boundary lines ma, nib, 110 is, for example, by plotting a large number of sample points and determining the number of points that result in erroneous determination for each adjacent group to be a small number. As a result of automatically judging a large number of stainless steel plate samples using the judgment method determined in the above procedure, it was possible to correctly judge about 97% of the samples, confirming that the test had sufficient performance. In addition, as a method for more finely determining the glossiness, the glossiness of each of the representative points C1, C2, C3, and C4 is set to 1.0.2.
0,3.014.0,,,on the other hand, the reference point R31 curve ℃
Intersection point Ta of boundary line aa, intersection point Tb of boundary line l1lb
, the glossiness of the intersection point Tc with the boundary line IC and the other reference point R13 are set to 0.5.1.5.2, 5.3., respectively.
5.4.5, and further calculate the glossiness of any point on the curve λ in each section (0, 5 to 1.0, 1.0 to 1.5, . . . 4
．． 0 to 4.5), and set it as a value proportionally interpolated along the curve /aJ2, and the glossiness of any sample is set as 2.
It can be defined as the glossiness of the point where the foot Q of the perpendicular drawn from the corresponding point P on the dimensional plane (11, 12) to the curve ai is located. According to this method, analog glossiness determination is possible. In the above embodiment, the present invention was applied to the evaluation of the glossiness of a stainless steel plate, but the scope of application of the present invention is not limited to this, and it can be similarly applied to the determination of the glossiness of the surface of a general object. it is obvious.
以上説明した通り、本発明によれば、同一色（明度は異
なってもよい）の対象について、目視光沢度に良く一致
し、且つ、鏡面から粗面までの広い粗度範囲に亘って定
量的に光沢度を定めることが４可能となる。従って、オ
ンラインにおける表面品質の計測、管理が可能となり、
不良発生の防止等、実用上の効果が大きいという優れた
効果を有する。As explained above, according to the present invention, for objects of the same color (brightness may be different), visual glossiness closely matches visual glossiness, and quantitative measurement is possible over a wide roughness range from specular to rough surfaces. It becomes possible to set the gloss level to 4. Therefore, it is possible to measure and manage surface quality online.
It has excellent practical effects such as prevention of defects.
第１図は、本発明に係る物体表面の光沢度判定方法の要
旨を示す流れ図、第２図は、本発明の詳細な説明・する
ための、２次元平面（１＋ ／ Ｓ １、Ｉｚ／Ｓ２）
上のサンプルの分布状況の例を示す縮図、第３図は、同
じく、２次元平面（Ｉ ｔ ／ Ｓｌ、Ｉ ２ ／ Ｓ
２ ）上の曲線ぶ及び直線慣の例を示す線図、第４図
は、同じく、本発明によりサンプル点を分類した最も簡
単な例を示す線区、第５図は、同じく、本発明により目
視光沢度を更に細かく評価した例を示す線図、第６図は
、本発明を適用してステンレス鋼板の光沢度評価を行っ
た実施例の判定結果を示す線図である。
σ・・・分散、 λ１、λ２・・・波長、θ
１、θ２・・・入射角、
ＩＩ、Ｉ２・・・正反射強度、
Ｓ１、Ｓｌ・・・全反射強度、
ぶ・・・曲線、
ｍ１ｙａａ、 ｒｏｂ、 ｒａａ・・・直線、Ｐ・・°
点、 Ｑ・・・垂線の足、Ｒ，ＲＳ 、Ｒ
ｅ ・・・基準点、
０１〜Ｃ４・・・代表点。
第１図
第２図
Ｉ、／Ｓ。
第３図
Ｉ、／Ｓ。
第４図
第５図
Ｉ、／ｓ。FIG. 1 is a flow chart showing the gist of the method for determining the glossiness of an object surface according to the present invention, and FIG. 2 is a two-dimensional plane (1+/S 1, Iz/S2 )
FIG. 3, a miniature map showing an example of the distribution situation of the above samples, is also a two-dimensional plane (I t / Sl, I 2 / S
2) Figure 4 is a line diagram showing an example of the curved line and straight line conventions above, and Figure 5 is a line diagram showing the simplest example of classifying sample points according to the present invention. FIG. 6 is a diagram showing an example of a more detailed visual gloss evaluation. FIG. 6 is a diagram showing the determination results of an example in which the present invention was applied to evaluate the gloss of a stainless steel plate. σ...Dispersion, λ1, λ2...Wavelength, θ
1, θ2...Incidence angle, II, I2...Specular reflection intensity, S1, Sl...Total reflection intensity, Bu...Curve, m1yaa, rob, raa...Straight line, P...°
Point, Q...leg of perpendicular line, R, RS, R
e...Reference point, 01-C4...Representative point. Figure 1 Figure 2 I, /S. Figure 3 I, /S. Figure 4 Figure 5 I, /s.
Claims (3)
づく光沢度を分類、等級付けする物体表面の光沢度判定
方法において、 被測定表面プロフィルの高さ分布の分散σが次式の関係 （４πσ／λ＿１・ｃｏｓθ＿１）＾２≦１（４πσ／
λ＿２・ｃｏｓθ＿２）＾２≧４を満足するように波長
λ＿１、λ＿２、入射角θ＿１、θ＿２を設定して、波
長λ＿１、λ＿２の２つの光束を入射角θ＿１、θ＿２
で投射し、 各々の正反射強度Ｉ＿１、Ｉ＿２及び全反射強度Ｓ＿１
、Ｓ＿２を検出し、 予め２次元平面（Ｉ＿１／Ｓ＿１、Ｉ＿２／Ｓ＿２）上
に各目視光沢度の代表点をプロットし、これを滑かに結
んで得られる曲線ｌを定めておき、 該曲線ｌと直交する直線ｍにより、任意の被測定物の光
沢度を分別することを特徴とする物体表面の光沢度判定
方法。(1) In an object surface gloss determination method that classifies and grades the glossiness based on visual perception based on the light reflection intensity distribution on the object surface, the variance σ of the height distribution of the measured surface profile is expressed by the following equation: (4πσ/λ_1・cosθ_1)^2≦1(4πσ/
The wavelengths λ_1, λ_2 and the incident angles θ_1, θ_2 are set so as to satisfy λ_2・cos θ_2)^2≧4, and the two light beams with the wavelengths λ_1 and λ_2 are converted into two light beams with the incident angles θ_1, θ_2.
and each specular reflection intensity I_1, I_2 and total reflection intensity S_1
, S_2 are detected, representative points of each visual gloss are plotted in advance on a two-dimensional plane (I_1/S_1, I_2/S_2), and a curve l obtained by smoothly connecting these points is determined, and the curve l is determined. 1. A method for determining the glossiness of a surface of an object, the method comprising classifying the glossiness of an arbitrary object to be measured using a straight line m perpendicular to l.
特許請求の範囲第１項記載の物体表面の光沢度判定方法
。(2) The method for determining the glossiness of an object surface according to claim 1, wherein the representative point of each visual glossiness is the center of gravity.
づく光沢度を分類、等級付けする物体表面の光沢度判定
方法において、 被測定表面プロフィルの高さ分布の分散σが次式の関係 （４πσ／λ＿１・ｃｏｓθ＿１）＾２≦１（４πσ／
λ＿２・ｃｏｓθ＿２）＾２≧４を満足するように波長
λ＿１、λ＿２、入射角θ＿１、θ＿２を設定して、波
長λ＿１、λ＿２の２つの光束を入射角θ＿１、θ＿２
で投射し、 各々の正反射強度Ｉ＿１、Ｉ＿２及び全反射強度Ｓ＿１
、Ｓ＿２を検出し、 予め２次元平面（Ｉ＿１／Ｓ＿１、Ｉ＿２／Ｓ＿２）上
に各目視光沢度の代表点をプロットし、これを滑かに結
んで得られる曲線ｌを定めておき、 任意の被測定物の光沢度を、該被測定物の前記２次元平
面上における点Ｐから前記曲線ｌに下した垂線の足Ｑの
、該曲線ｌ上の基準点Ｒからの曲線ｌに沿つた距離によ
り評価することを特徴とする物体表面の光沢度判定方法
。(3) In an object surface gloss determination method that classifies and ranks gloss based on visual perception based on the light reflection intensity distribution on the object surface, the variance σ of the height distribution of the measured surface profile is expressed by the following equation: (4πσ/λ_1・cosθ_1)^2≦1(4πσ/
The wavelengths λ_1, λ_2 and the incident angles θ_1, θ_2 are set so as to satisfy λ_2・cos θ_2)^2≧4, and the two light beams with the wavelengths λ_1 and λ_2 are converted into two light beams with the incident angles θ_1, θ_2.
and each specular reflection intensity I_1, I_2 and total reflection intensity S_1
, S_2 are detected, representative points of each visual gloss are plotted in advance on a two-dimensional plane (I_1/S_1, I_2/S_2), a curve l obtained by smoothly connecting these points is determined, and an arbitrary The glossiness of the object to be measured is determined by the distance along the curve 1 from the reference point R on the curve 1 of the foot Q of the perpendicular line drawn from the point P on the two-dimensional plane of the object to the curve 1. A method for determining glossiness of an object surface, characterized by evaluating the glossiness of an object surface.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59253529A JPS61130857A (en) | 1984-11-30 | 1984-11-30 | Decision for gloss of object surface |
| EP85115140A EP0183270B1 (en) | 1984-11-30 | 1985-11-29 | Method of determining glossinesses of surface of body |
| CA000496546A CA1240052A (en) | 1984-11-30 | 1985-11-29 | Method of and apparatus for determining glossinesses of surface of body |
| US06/802,742 US4750140A (en) | 1984-11-30 | 1985-11-29 | Method of and apparatus for determining glossiness of surface of a body |
| DE8585115140T DE3579119D1 (en) | 1984-11-30 | 1985-11-29 | METHOD FOR DETERMINING THE SURFACE GLOSS OF A BODY. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59253529A JPS61130857A (en) | 1984-11-30 | 1984-11-30 | Decision for gloss of object surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61130857A true JPS61130857A (en) | 1986-06-18 |
| JPH037897B2 JPH037897B2 (en) | 1991-02-04 |
Family
ID=17252634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59253529A Granted JPS61130857A (en) | 1984-11-30 | 1984-11-30 | Decision for gloss of object surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61130857A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009293916A (en) * | 2008-06-09 | 2009-12-17 | Leister Process Technologies | Resistance heating element for heating device of flowing gas |
-
1984
- 1984-11-30 JP JP59253529A patent/JPS61130857A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009293916A (en) * | 2008-06-09 | 2009-12-17 | Leister Process Technologies | Resistance heating element for heating device of flowing gas |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH037897B2 (en) | 1991-02-04 |
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