JPH0468582B2 - - Google Patents
Info
- Publication number
- JPH0468582B2 JPH0468582B2 JP15170987A JP15170987A JPH0468582B2 JP H0468582 B2 JPH0468582 B2 JP H0468582B2 JP 15170987 A JP15170987 A JP 15170987A JP 15170987 A JP15170987 A JP 15170987A JP H0468582 B2 JPH0468582 B2 JP H0468582B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- prism
- measured
- half mirror
- parallel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005259 measurement Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- 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)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は紙等の被測定対象物質の光沢度を測定
する装置に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an apparatus for measuring the glossiness of a material to be measured such as paper.
〈従来の技術〉
紙等の光沢度を測定する装置として、紙の表面
の法線に対し所定角度で光を照射し、正反射方向
に配置した光検出器で正反射光を検出し、この正
反射光のピーク光量から光沢度を測定するものが
知られている。<Prior art> As a device for measuring the glossiness of paper, etc., light is irradiated at a predetermined angle to the normal to the surface of the paper, the specularly reflected light is detected by a photodetector placed in the direction of specular reflection, and the specularly reflected light is detected. There is a known method that measures glossiness from the peak amount of specularly reflected light.
〈発明が解決しようとする問題点〉
しかしながら、紙の繊維（セルロース）は抄紙
プロセスのワイヤ上で引張られて特定方向に並ん
でしまう。セルロースの向きに対し平行の向きか
ら光を照射しその正反射光を測定する場合と、垂
直方向から光を照射し正反射光を測定する場合と
では測定結果が異なる。<Problems to be Solved by the Invention> However, paper fibers (cellulose) are stretched on wires in the papermaking process and are arranged in a specific direction. The measurement results differ depending on whether the light is irradiated from a direction parallel to the direction of the cellulose and the specularly reflected light is measured, and the case where the light is irradiated from the perpendicular direction and the specularly reflected light is measured.
本発明の解決しようとする技術的課題は、被測
定対象の繊維の向きによつて測定結果が影響され
ない光沢度測定装置を実現することにある。 A technical problem to be solved by the present invention is to realize a glossiness measuring device whose measurement results are not affected by the orientation of the fibers to be measured.
〈問題点を解決するための手段〉
本発明の構成は、光源からの光を平行光とする
コリメートレンズと、頂点側を被測定対象側に向
けて配置されたせつ頭円錐プリズムと、前記コリ
メートレンズからの平行光が与えられたミラー
で、中心部分に遮光部が形成されたハーフミラー
と、前記プリズム及び前記ハーフミラーを経て与
えられる前記被測定対象表面からの正反射光を受
光する測定光検出手段とを備え、前記ハーフミラ
ーの遮光部により前記平行光の中心部を遮光し前
記プリズムの周縁部にのみ光を照射し、このプリ
ズムの中心軸に対称な光波を前記被測定対象表面
の法線に対し所定角度で入射させ、前記被測定対
象表面で反射された正反射光を再度前記プリズム
に入射させ、この光を前記測定光検出手段に集光
しそのピーク値から光沢度を測定するようにした
ことにある。<Means for Solving the Problems> The configuration of the present invention includes a collimating lens that converts light from a light source into parallel light, a truncated conical prism arranged with its apex side facing the object to be measured, and the collimating lens. A half mirror that receives parallel light from a lens and has a light blocking portion formed in its center, and a measurement light that receives specularly reflected light from the surface of the object to be measured that is provided through the prism and the half mirror. detecting means, which blocks the central part of the parallel light by the light shielding part of the half mirror, irradiates the light only to the peripheral part of the prism, and sends a light wave symmetrical about the central axis of the prism to the surface of the object to be measured. Specularly reflected light reflected from the surface of the object to be measured is made incident at a predetermined angle with respect to the normal line, and is made to enter the prism again, and this light is focused on the measurement light detection means, and the degree of gloss is measured from its peak value. It's what I chose to do.
〈作用〉
前記の技術手段は次のように作用する。即ち、
前記プリズムの周囲部分にのみ前記ハーフミラー
からの平行光が与えられており、この平行光はプ
リズム境界面で反射され、プリズムの中心軸に対
称に、且つ前記被測定対象表面の法線に対し所定
角度で入射する。<Operation> The above technical means operates as follows. That is,
Parallel light from the half mirror is applied only to the peripheral portion of the prism, and this parallel light is reflected at the prism boundary surface and is symmetrical to the central axis of the prism and to the normal to the surface of the object to be measured. Incident at a predetermined angle.
前記被測定対象表面からの正反射光は前記プリ
ズムの境界面で再度反射され、前記ハーフミラー
を通過して前記受光手段に向かう。このとき、前
記被測定対象から垂直方向に反射する散乱光は前
記ハーフミラーの遮光部で遮光され、前記受光手
段に達することはない。 The specularly reflected light from the surface of the object to be measured is reflected again at the boundary surface of the prism, passes through the half mirror, and heads toward the light receiving means. At this time, the scattered light reflected in the vertical direction from the object to be measured is blocked by the light blocking portion of the half mirror and does not reach the light receiving means.
前記ハーフミラーを通過した光束は集光レンズ
で集光され、前記測定光検出手段に前記被測定対
象の各方向からの正反射光を合算した量の光が結
像される。 The light flux that has passed through the half mirror is condensed by a condenser lens, and an image of the sum of regularly reflected light from each direction of the object to be measured is formed on the measurement light detection means.
〈実施例〉
以下図面に従い本発明の実施例を説明する。第
１図は本発明実施例装置を示す構成図、第２図は
本発明実施例装置におけるせつ頭円錐プリズムの
斜視図である。図中、１は光源、２は光源１から
の光を平行光とするコリメートレンズ、３は頂点
側を紙等の被測定対象４側に向けて配置され、中
心に空洞部３ａが形成されたせつ頭円錐プリズ
ム、５はコリメートレンズ２からの平行光に対し
て45゜の角度で配置されたハーフミラーで中心部
にプリズム３の中心部に光を照射しないようにす
る為、及び被測定対象４からの垂直方向の散乱光
を遮光する為の遮光部５ａが設けられている。<Examples> Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing an apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view of a truncated conical prism in the apparatus according to an embodiment of the present invention. In the figure, 1 is a light source, 2 is a collimating lens that converts the light from the light source 1 into parallel light, and 3 is arranged with the apex side facing the object to be measured 4 such as paper, and a cavity 3a is formed in the center. The truncated conical prism 5 is a half mirror placed at an angle of 45 degrees with respect to the parallel light from the collimating lens 2, and is placed at the center to prevent light from irradiating the center of the prism 3, and to prevent the light from irradiating the object to be measured. A light shielding portion 5a is provided to shield vertically scattered light from the light source 4.
６は、ハーフミラー５の遮光部５ａの周囲５ｂ
部分を通過した、被測定対象４からの正反射光を
集光し、測定光検出器７に結像する集光レンズで
ある。８は、ハーフミラー５の遮光部５ａの周囲
５ｂ部分を通過したコリメートレンズ２からの平
行光を集光し、参照光検出器９に結像する集光レ
ンズである。 6 is the periphery 5b of the light shielding part 5a of the half mirror 5
This is a condensing lens that condenses the specularly reflected light from the object to be measured 4 that has passed through the section, and forms an image on the measurement light detector 7. Reference numeral 8 denotes a condenser lens that condenses the parallel light from the collimator lens 2 that has passed through the periphery 5b of the light shielding part 5a of the half mirror 5, and forms an image on the reference light detector 9.
このような構成で、コリメートレンズ２で平行
光とされた光はハーフミラー５でプリズム３側と
集光レンズ８側に２分割される。プリズム３側の
平行光はプリズム３の周縁部３ｂよりプリズム内
に入り、プリズムの境界面３ｃで反射され、プリ
ズム３の中心軸Ｏに対称に、且つ被測定対象４表
面の法線に対し所定角度で入射される。被測定対
象４の表面から反射された正反射光はプリズム３
の境界面３ｃで反射され、ハーフミラー５の周囲
５ｂ部分を通過して集光レンズ６で集光され測定
光検出器７に結像される。即ち、測定光はａ→ｂ
→ｃ→ｄ→ｅ→ｆ→ｇの光路を辿つて検出器７に
結像される。 With this configuration, the light that is made into parallel light by the collimating lens 2 is split into two parts by the half mirror 5 into the prism 3 side and the condensing lens 8 side. The parallel light on the prism 3 side enters the prism from the peripheral edge 3b of the prism 3, is reflected at the boundary surface 3c of the prism, and is symmetrical about the central axis O of the prism 3 and at a predetermined angle with respect to the normal to the surface of the object to be measured 4. incident at an angle. The specularly reflected light reflected from the surface of the object to be measured 4 is reflected by the prism 3.
The light is reflected at the boundary surface 3c of the half mirror 5, passes through the periphery 5b of the half mirror 5, is focused by the condenser lens 6, and is imaged on the measurement photodetector 7. That is, the measurement light is a→b
An image is formed on the detector 7 following the optical path →c→d→e→f→g.
一方、コリメートレンズ２からの平行光のうち
ハーフミラー５を透過した光は集光レンズ８で集
光され参照光検出器９に結像される。即ち、参照
光はａ→ｂ→ｊの光路を辿つて検出器９に結像さ
れる。 On the other hand, among the parallel lights from the collimator lens 2 , the light that has passed through the half mirror 5 is focused by a condenser lens 8 and imaged on a reference light detector 9 . That is, the reference light follows an optical path of a→b→j and is imaged on the detector 9.
プリズム３は中心軸Ｏに対称な光を入、出射す
る為、測定対象４の繊維の向きに対し、平行から
直角方向まで連続的に照射され、測定光検出器７
には被測定対象４の各方向からの正反射光を合算
した量の光が結像される。尚、検出器７で検出さ
れた信号に対し参照光検出器９で検出された信号
を用いドリフト補償演算が行われ、光源１或は検
出器７，９のドリフトの影響を除いた光沢度信号
を出力するようにしている。 Since the prism 3 inputs and outputs light that is symmetrical about the central axis O, it is continuously irradiated from parallel to perpendicular to the direction of the fiber of the measurement object 4, and the measurement light detector 7
The amount of light that is the sum of specularly reflected light from each direction of the object to be measured 4 is imaged. Incidentally, a drift compensation calculation is performed using the signal detected by the reference photodetector 9 on the signal detected by the detector 7, and the glossiness signal is obtained by removing the influence of the drift of the light source 1 or the detectors 7 and 9. I am trying to output .
〈発明の効果〉
本発明によれば、前記せつ頭円錐プリズムの中
心軸に対称に、前記被測定対称の表面の法線に対
し所定角度で光を照射し、その正反射光だけを検
出するものである為、測定信号は前記被測定対象
の表面状態の平均的な値を表わし、前記被測定対
象の繊維の向きの影響を受けない。<Effects of the Invention> According to the present invention, light is irradiated symmetrically to the central axis of the truncated conical prism at a predetermined angle to the normal to the surface of the object to be measured, and only the specularly reflected light is detected. Therefore, the measurement signal represents the average value of the surface state of the object to be measured, and is not affected by the orientation of the fibers of the object to be measured.
尚、測定光検出器７を例えば２次元の受光面を
有する受光手段を用いれば、光沢度の外、前記被
測定対象の繊維の配向状態をリアルタイムで検知
することができる。 If the measuring photodetector 7 is, for example, a light receiving means having a two-dimensional light receiving surface, it is possible to detect not only the gloss level but also the orientation state of the fibers of the object to be measured in real time.
第１図は本発明実施例装置を示す構成図、第２
図は本発明実施例装置におけるせつ頭円錐プリズ
ムの斜視図である。
１…光源、２…コリメートレンズ、３…せつ頭
円錐プリズム、４…被測定対象、５…ハーフミラ
ー、５ａ…遮光部、６…集光レンズ、７…測定光
検出器。
FIG. 1 is a configuration diagram showing an apparatus according to an embodiment of the present invention, and FIG.
The figure is a perspective view of a truncated conical prism in an apparatus according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Light source, 2... Collimating lens, 3... Frame-head conical prism, 4... Measured object, 5... Half mirror, 5a... Light shielding part, 6... Condensing lens, 7... Measurement light detector.
Claims (1)
ズと、頂点側を被測定対象側に向けて配置された
せつ頭円錐プリズムと、前記コリメートレンズか
らの平行光が与えられたミラーで、中心部分に遮
光部が形成されたハーフミラーと、前記プリズム
及び前記ハーフミラーを経て与えられる前記被測
定対象表面からの正反射光を受光する測定光検出
手段とを備え、前記ハーフミラーの遮光部により
前記平行光の中心部を遮光し前記プリズムの周縁
部にのみ光を照射し、このプリズムの中心軸に対
称な光波を前記被測定対象表面の法線に対し所定
角度で入射させ、前記被測定対象表面で反射され
た正反射光を再度前記プリズムに入射させ、この
光を前記測定光検出手段に集光しそのピーク値か
ら光沢度を測定するようにしたことを特徴とする
光沢度測定装置。1 A collimating lens that converts the light from the light source into parallel light, a truncated conical prism whose apex side is placed toward the side to be measured, and a mirror to which the parallel light from the collimating lens is applied. A half mirror in which a light shielding part is formed, and a measurement light detection means for receiving specularly reflected light from the surface of the object to be measured, which is given through the prism and the half mirror, and the light shielding part of the half mirror causes the parallel The central part of the light is blocked and the light is irradiated only to the periphery of the prism, and a light wave symmetrical to the central axis of the prism is made incident at a predetermined angle to the normal to the surface of the object to be measured, and the surface of the object to be measured is A glossiness measuring device characterized in that the specularly reflected light reflected by the prism is made to enter the prism again, the light is focused on the measurement light detection means, and the glossiness is measured from its peak value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15170987A JPS63314446A (en) | 1987-06-18 | 1987-06-18 | Glossiness measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15170987A JPS63314446A (en) | 1987-06-18 | 1987-06-18 | Glossiness measuring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63314446A JPS63314446A (en) | 1988-12-22 |
| JPH0468582B2 true JPH0468582B2 (en) | 1992-11-02 |
Family
ID=15524555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15170987A Granted JPS63314446A (en) | 1987-06-18 | 1987-06-18 | Glossiness measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63314446A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2616090B2 (en) * | 1990-01-25 | 1997-06-04 | トヨタ自動車株式会社 | Painted surface gloss measurement device |
-
1987
- 1987-06-18 JP JP15170987A patent/JPS63314446A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63314446A (en) | 1988-12-22 |
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