JPS63314446A - Glossiness measuring apparatus - Google Patents
Glossiness measuring apparatusInfo
- Publication number
- JPS63314446A JPS63314446A JP15170987A JP15170987A JPS63314446A JP S63314446 A JPS63314446 A JP S63314446A JP 15170987 A JP15170987 A JP 15170987A JP 15170987 A JP15170987 A JP 15170987A JP S63314446 A JPS63314446 A JP S63314446A
- Authority
- JP
- Japan
- Prior art keywords
- light
- prism
- measured
- parallel
- half mirror
- 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
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004575 stone 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)
Abstract
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
対し所定角疾で光を照射し、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 with respect to the normal to the paper surface, and the specularly reflected light is detected by a photodetector placed in the specularly reflecting direction. It is known to measure 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
ｔａの向きによっ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 ta of the object to be measured.
・く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−と、前記プリズム及び前記ハーフミラ
−を経て与えられる前記被測定対像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−
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; A mirror to which parallel light from a collimating lens is applied, and which receives specularly reflected light from the surface to be measured, which is applied through a half mirror with a light shielding part formed in the center, and the prism and the half mirror. and a measurement light detection means, the half mirror
The central part of the parallel light is shielded by a light shielding part, the light is irradiated only to the peripheral part of the prism, and the light wave symmetrical about the central axis of the prism is made to enter at a predetermined angle with respect to the normal to the surface of the object to be measured. The specularly reflected light reflected by the surface of the object to be measured is made to enter the prism again, this light is focused on the measurement light detection means, and the degree of gloss is measured from its peak value.
く作用〉
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−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。Function> The above technical means works as follows. That is, the 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, symmetrical to the central axis of the prism, and symmetrical 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−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−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−を通過した光束（よ集光レンズで集光
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 specularly 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詳細な説明する。第１図は本発
明実施例′ａ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が形成されたせっ頭円錐
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−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。<Example> The present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention 'a', and FIG. 2 is a perspective view of a truncated conical prism in an 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 a crest with the apex side facing the measured object 4 side such as paper, and with a cavity '3a formed in the center. The conical prism 5 is a half mirror placed at an angle of 45'' 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 from the object to be measured 4. A light shielding portion 5a is provided to shield vertically scattered light.
６は、ハーフミラ−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−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。Reference numeral 6 denotes a condenser lens that condenses the specularly reflected light from the object to be measured 4 that has passed through the periphery 5b of the light shielding portion 5a of the half mirror 5, and forms an image on the measurement light detector 7. Reference numeral 8 denotes a condenser lens that condenses the parallel light from the collimating lens 2 that has passed through the periphery 5b of the light shielding portion 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−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３
ｃで反射され、プリズム３の中心軸０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＠！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−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→６−
＋ ｆ−４（Ｊの光路を辿って検出器７に結像される。With this configuration, the light that has been made into parallel light by the collimating lens 2 is split into two 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, and enters the prism boundary surface 3.
c and is incident symmetrically about the central axis 0 of the prism 3 and at a predetermined angle to the normal to the surface of the object to be measured 4. Measured pair @! The specularly reflected light reflected from the surface of the prism 3 is reflected by the boundary surface 3c of the prism 3, and is reflected by the periphery 5b of the half mirror 5.
The light passes through the area and is focused by a condensing lens 6 and then sent to a measurement light detector 7.
is imaged. That is, the measurement light is a→b→c-+d→6-
+ f-4 (follows the optical path of J and is imaged on the detector 7.
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−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−４ｂ−＋ｊの
光路を辿って検出器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-4b-+j and is imaged on the detector 9.
プリズム３は中心ｌ１ｉｌｂＯに対称な光を入、出射す
る為、測定対象４の繊緒の向きに対し、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石の光が結像さ
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 symmetrical light at the center l1ilbO, it is continuously irradiated from parallel to perpendicular direction to the direction of the cord of the object to be measured 4, and the measurement light detector 7 receives light from the object to be measured 4. The light from the stone is formed by adding up the specularly reflected light from each direction. 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 detector 7.9. I am trying to output .
〈発明の効果〉
本発明によれば、前記せっ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（プ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 frustoconical prism at a predetermined angle to the normal to the surface of the object to be measured, and the specularly reflected light is Since it is a detection signal, the measurement signal represents the average value of the surface condition 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っ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−１５ａ・・・遮光部、６・・・集光レンズ、７
・・・測定光検出器
第２図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 frustoconical prism in the 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 15a... Light shielding part, 6... Condensing lens ,7
...Measurement photodetector Figure 2
Claims (1)
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。A collimating lens that converts the light from the light source into parallel light, a truncated conical prism with its apex facing toward the object to be measured, and a mirror that receives the parallel light from the collimating lens to block light in the center. a half mirror in which a portion is formed, and a measurement light detection means for receiving specularly reflected light from the surface of the object to be measured, which is provided via the prism and the half mirror, and detects the parallel light by the light shielding portion of the half mirror. The central part of the prism is shielded from light, and only the peripheral part of the prism is irradiated with light, 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. A glossiness measuring device characterized in that the specularly reflected light 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 true JPS63314446A (en) | 1988-12-22 |
| JPH0468582B2 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03220443A (en) * | 1990-01-25 | 1991-09-27 | Toyota Motor Corp | Measuring apparatus of glossiness of painted surface |
-
1987
- 1987-06-18 JP JP15170987A patent/JPS63314446A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03220443A (en) * | 1990-01-25 | 1991-09-27 | Toyota Motor Corp | Measuring apparatus of glossiness of painted surface |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0468582B2 (en) | 1992-11-02 |
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