JPH0378568B2 - - Google Patents
Info
- Publication number
- JPH0378568B2 JPH0378568B2 JP57171935A JP17193582A JPH0378568B2 JP H0378568 B2 JPH0378568 B2 JP H0378568B2 JP 57171935 A JP57171935 A JP 57171935A JP 17193582 A JP17193582 A JP 17193582A JP H0378568 B2 JPH0378568 B2 JP H0378568B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- receiving element
- light receiving
- emitting diode
- measurement
- 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 - Lifetime
Links
- 238000005259 measurement Methods 0.000 claims description 40
- 239000000758 substrate Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/52—Measurement of colour; Colour measuring devices, e.g. colorimeters using colour charts
- G01J3/524—Calibration of colorimeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J2003/2866—Markers; Calibrating of scan
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/501—Colorimeters using spectrally-selective light sources, e.g. LEDs
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
Description
【発明の詳細な説明】
本発明は、測定面に対して平行な平面内の円周
上に発光色の異なる複数個の発光ダイオードを配
列して測定面を照射し、測定面での反射光を測定
光用受光素子で受光することにより、測定光用受
光素子の出力に基づいて色測定を行うようにした
色測定装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention involves arranging a plurality of light emitting diodes with different emission colors on the circumference in a plane parallel to the measurement surface, illuminating the measurement surface, and emitting light reflected from the measurement surface. The present invention relates to a color measuring device that measures color based on the output of the measuring light receiving element by receiving the light with the measuring light receiving element.
この種の色測定装置では、第１図に示すよう
に、測定面４に平行な平面内の円周上に、赤色発
光ダイオード（以下、Ｒ−LEDと略す）１、緑
色発光ダイオード（以下、Ｇ−LEDと略す２、
青色発光ダイオード（以下、Ｂ−LEDと略す）
３をそれぞれ複数個ずつ配列する。Ｒ−LED１，
Ｇ−LED２，Ｂ−LED３は、光軸が測定面４の
一点で交わるとともに、各光軸の測定面４に対す
る交角が等しくなるように配置され、一般には光
軸と測定面４との交角は45゜になるように設定さ
れる。また、測定面４での反射光は、レンズ５で
集光され、測定光用受光素子６で受光される。測
定光用受光素子６の光軸は、Ｒ−LED１，Ｇ−
LED２，Ｂ−LED３の光軸の交点を通り、かつ、
測定面４に対して直交するように設定される。こ
の構成において、Ｒ−LED１，Ｇ−LED２，Ｂ
−LED３によつてそれぞれ測定面４を照射した
ときに、測定光用受光素子６で受光される反射光
のレベルに基づいて、測定面４の色を知ることが
できるのである。 In this type of color measuring device, as shown in FIG. 1, a red light emitting diode (hereinafter referred to as R-LED) 1 and a green light emitting diode (hereinafter referred to as Abbreviated as G-LED2,
Blue light emitting diode (hereinafter abbreviated as B-LED)
Arrange a plurality of each of 3. R-LED1,
G-LED 2 and B-LED 3 are arranged so that their optical axes intersect at one point on the measurement surface 4 and the intersection angles of each optical axis with respect to the measurement surface 4 are equal. Generally, the intersection angle between the optical axis and the measurement surface 4 is The angle is set to 45°. Further, the reflected light from the measurement surface 4 is collected by the lens 5 and received by the measurement light receiving element 6. The optical axis of the light receiving element 6 for measurement light is R-LED1, G-
Pass through the intersection of the optical axes of LED2, B-LED3, and
It is set perpendicular to the measurement plane 4. In this configuration, R-LED1, G-LED2, B
- When the measurement surface 4 is irradiated by each LED 3, the color of the measurement surface 4 can be determined based on the level of reflected light received by the measurement light receiving element 6.
しかしながら、上記構成では、温度変化や経時
変化によるＲ−LED１，Ｇ−LED２，Ｂ−LED
３の発光光量の変動に対する補償ができないもの
であるから、測定誤差が生じやすいという問題が
ある。 However, in the above configuration, R-LED1, G-LED2, B-LED
Since it is not possible to compensate for the variation in the amount of emitted light as described in No. 3, there is a problem in that measurement errors are likely to occur.
この問題を解決するために、Ｒ−LED１，Ｇ
−LED２，Ｂ−LED３からの光の一部を光フア
イバを用いて分岐して測定光用受光素子６とは別
に設けた参照光用受光素子で受光し、参照光用受
光素子の出力に基づいて発光光量の変動を補償す
ることが考えられる。 To solve this problem, R-LED1, G
- Part of the light from the LED2, B-LED3 is branched using an optical fiber and received by a reference light receiving element provided separately from the measuring light receiving element 6, and based on the output of the reference light receiving element 6. It is conceivable to compensate for fluctuations in the amount of emitted light.
しかしながら、Ｒ−LED１，Ｇ−LED２，Ｂ
−LED３は複数個ずつ設けられているから、光
フアイバをＲ−LED１，Ｇ−LED２，Ｂ−LED
３に一対一に対応させて設けるとすれば、多数の
光フアイバが必要になり光フアイバの配置が難し
くなるという問題が生じる。 However, R-LED1, G-LED2, B
-Since multiple LED3 are provided, the optical fibers are connected to R-LED1, G-LED2, and B-LED.
If the optical fibers are provided in one-to-one correspondence with each other, a problem arises in that a large number of optical fibers are required and the arrangement of the optical fibers becomes difficult.
本発明は上記問題点の解決を目的とするもので
あり、測定面への照射光の一部を分岐して参照光
用受光素子に入射させ、照射光の光量変動を補償
できるようにすることによつて温度変化や経時変
化による測定誤差の発生を抑制し、しかも、参照
光を参照光用受光素子に導く経路に筒状の光伝導
体を用いることによつて、光フアイバを用いる場
合に比較して簡単な構成で安価に提供できる色測
定装置を提供しようとするものである。以下本発
明を実施例に基づいて詳細に説明する。 The present invention aims to solve the above-mentioned problems, and it is possible to compensate for variations in the amount of light irradiated by branching a part of the light irradiated onto the measurement surface and making it incident on a reference light receiving element. In addition, by using a cylindrical photoconductor in the path that guides the reference light to the reference light receiving element, it is possible to suppress the occurrence of measurement errors due to temperature changes and changes over time. The present invention aims to provide a color measuring device that has a relatively simple configuration and can be provided at low cost. The present invention will be described in detail below based on examples.
第２図および第３図に示すように、測定面４に
対して平行な平面内の円周上に、それぞれ複数個
ずつのＲ−LED１，Ｇ−LED２，Ｂ−LED３が
配列される。Ｒ−LED１，Ｇ−LED２，Ｂ−
LED３は、各色によつて測定面４がほぼ均等に
照射されるように分布して配置される。また、Ｒ
−LED１，Ｇ−LED２，Ｂ−LED３は、円錐台
状に形成された光伝導体１８の壁に挿通された形
で配置される。光伝導体１８は、アクリル等の透
明材料により測定面４に平行な断面が円環状にな
るように形成され、測定面４から離れるに従つて
径が小さくなるように配置される。また、光伝導
体１８の内周面と外周面とには、白色の塗装や反
射膜のコーテイングが施される。光伝導体１８の
内側には測定面４に対して光軸が直交するレンズ
５が配設され、レンズ５により集光された光が、
光伝導体１８の小径側の開口を閉塞するように配
置された円板状の測定光用受光素子６に入射する
ようになつている。一方、光伝導体１８の壁にお
ける小径側の端面には円環状に形成された参照光
用受光素子１０が配設され、Ｒ−LED１，Ｇ−
LED２，Ｂ−LED３において壁内に挿入されて
いる部位から出た光が、光伝導体１８の壁の内部
で反射しながら伝達され、参照光用受光素子１０
に入射するようになつている。したがつて、参照
光用受光素子１０は、すべてのＲ−LED１，Ｇ
−LED２，Ｂ−LED３から等距離に位置するこ
とになり、すべてのＲ−LED１，Ｇ−LED２，
Ｂ−LED３からの光を等条件で受光できるので
ある。ここにおいて、測定光用受光素子６と参照
光用受光素子１０とは一つの基板の上に配設され
ており、温度ドリフトなどによる特性変化が同じ
条件で生じるようにしてある。 As shown in FIGS. 2 and 3, a plurality of R-LEDs 1, G-LEDs 2, and B-LEDs 3 are arranged on the circumference in a plane parallel to the measurement surface 4. R-LED1, G-LED2, B-
The LEDs 3 are distributed and arranged so that the measurement surface 4 is almost uniformly illuminated by each color. Also, R
-LED1, G-LED2, and B-LED3 are arranged so as to be inserted through the wall of the photoconductor 18, which is formed in the shape of a truncated cone. The photoconductor 18 is formed of a transparent material such as acrylic so that its cross section parallel to the measurement surface 4 has an annular shape, and is arranged so that its diameter decreases as it moves away from the measurement surface 4. Further, the inner peripheral surface and outer peripheral surface of the photoconductor 18 are coated with white paint or a reflective film. A lens 5 whose optical axis is perpendicular to the measurement surface 4 is disposed inside the photoconductor 18, and the light focused by the lens 5 is
The light enters a disc-shaped measuring light receiving element 6 arranged so as to close the opening on the small diameter side of the photoconductor 18 . On the other hand, a reference light receiving element 10 formed in an annular shape is arranged on the end face on the small diameter side of the wall of the photoconductor 18, and R-LED1, G-
Light emitted from the portions of the LEDs 2 and B-LEDs 3 inserted into the wall is transmitted while being reflected inside the wall of the photoconductor 18, and is transmitted to the reference light receiving element 10.
It is designed to be incident on . Therefore, the reference light receiving element 10 is for all R-LEDs 1, G
It will be located at the same distance from -LED2, B-LED3, and all R-LED1, G-LED2,
The light from the B-LED 3 can be received under the same conditions. Here, the measuring light receiving element 6 and the reference light receiving element 10 are arranged on one substrate so that changes in characteristics due to temperature drift and the like occur under the same conditions.
ところで、測定光用受光素子６および参照光用
受光素子１０の出力は、演算処理部に入力されて
色測定が行われる。演算処理部は、第４図のよう
に、マイクロコンピユータ１１を主構成とし、マ
イクロコンピユータ１１は、LEDドライバー１
２を介してＲ−LED１，Ｇ−LED２，Ｂ−LED
３を点滅制御する。すなわち、マイクロコンピユ
ータ１１は、第５図ａ，ｂ，ｃのように、Ｒ−
LED１，Ｇ−LED２，Ｂ−LED３をそれぞれ複
数回（ｎ＋１回）ずつ点灯させるように、Ｒ−
LED１，Ｇ−LED２，Ｂ−LED３に対して点灯
タイミングパルスを複数個ずつ順に発生する。測
定光用受光素子６および参照光用受光素子１０の
出力は、アナログスイツチ１３を介してＡ／Ｄコ
ンバータ１４に入力される。アナログスイツチ１
３は、制御入力が“Ｌ”であるときには測定光用
受光素子６の出力をＡ／Ｄコンバータ１４に入力
し、制御入力が“Ｈ”であるときには参照光用受
光素子１０の出力をＡ／Ｄコンバータ１４に入力
する。アナログスイツチ１３の制御入力は、第５
図ｄに示すように、Ｒ−LED１，Ｇ−LED２，
Ｂ−LED３に対してそれぞれｎ個の点灯タイミ
ングパルスが発生している期間は“Ｌ”になり、
残りの１個の点灯タイミングパルスが発生してい
る期間には“Ｈ”になる。Ａ／Ｄコンバータ１４
は、Ｒ−LED１，Ｇ−LED２，Ｂ−LED３の消
灯時と点灯時とについて、それぞれ第５図ｅ，ｆ
のようなタイミングで測定光用受光素子６と参照
光用受光素子１０の出力である光量値をＡ／Ｄ変
換する。測定光用受光素子６では、消灯時には外
乱光による光量値Ｎ、点灯時には外乱光と反射光
とを合わせた光量値Ｎ＋Ｓが得られ、参照光用受
光素子１０では、消灯時には外乱光による光量値
Ns、点灯時には外乱光と参照光とを合わせた光
量値Ns＋Ssが得られる。したがつて、Ａ／Ｄコ
ンバータ１４の出力をマイクロコンピユータ１１
でサンプリングし、Ｒ−LED１，Ｇ−LED２，
Ｂ−LED３のそれぞれについて、測定光用受光
素子６により得られる光量値に対しては消灯時と
点灯時との加算平均値ave（Ｎ）、ave（Ｓ）を計算
し、外乱光成分を除いた反射光に対応する光量値
の加算平均値ave（Ｓ）を、次式のようにして求
める。 Incidentally, the outputs of the measuring light receiving element 6 and the reference light receiving element 10 are input to an arithmetic processing section and color measurement is performed. The arithmetic processing section mainly includes a microcomputer 11 as shown in FIG.
R-LED1, G-LED2, B-LED through 2
Controls blinking of 3. That is, the microcomputer 11 has R-
R-
A plurality of lighting timing pulses are sequentially generated for LED1, G-LED2, and B-LED3. The outputs of the measuring light receiving element 6 and the reference light receiving element 10 are input to an A/D converter 14 via an analog switch 13. analog switch 1
3 inputs the output of the measurement light light receiving element 6 to the A/D converter 14 when the control input is "L", and inputs the output of the reference light light receiving element 10 to the A/D converter 14 when the control input is "H". The signal is input to the D converter 14. The control input of the analog switch 13 is the fifth
As shown in Figure d, R-LED1, G-LED2,
During the period when n lighting timing pulses are generated for each B-LED3, it becomes "L",
It becomes "H" during the period in which the remaining one lighting timing pulse is generated. A/D converter 14
are Fig. 5e and f for when R-LED1, G-LED2, and B-LED3 are turned off and turned on, respectively.
The light quantity values, which are the outputs of the measuring light receiving element 6 and the reference light receiving element 10, are A/D converted at timings such as . The measuring light receiving element 6 obtains a light amount value N due to the disturbance light when the light is off, and the light amount value N+S which is the sum of the disturbance light and reflected light when the light is on.The reference light receiving element 10 obtains a light amount value due to the disturbance light when the light is off.
Ns, and when the light is turned on, a light amount value Ns+Ss is obtained, which is the sum of the disturbance light and the reference light. Therefore, the output of the A/D converter 14 is transmitted to the microcomputer 11.
sampled, R-LED1, G-LED2,
For each of the B-LEDs 3, calculate the additive average values ave (N) and ave (S) of when the light is turned off and when the light is turned on for the light intensity value obtained by the measurement light receiving element 6, and remove the disturbance light component. The additive average value ave(S) of the light amount values corresponding to the reflected light is calculated using the following equation.
ave（Ｓ）＝ave（Ｓ＋Ｎ）−ave（Ｎ）
また、参照光用受光素子１０の出力に対して
は、消灯時と点灯時との光量値に基づいて外乱光
を除去した参照光の光量値Ssを次式のようにし
て求める。 ave (S) = ave (S + N) - ave (N) In addition, for the output of the reference light light receiving element 10, the light intensity of the reference light with disturbance light removed based on the light intensity values when the light is off and when the light is on. The value Ss is found using the following formula.
Ss＝（Ss＋Ns）−Ns
以上のようにして、測定光と参照光とについ
て、外乱光を除去した光量値を求めることができ
のである。 Ss=(Ss+Ns)-Ns In the above manner, it is possible to obtain the light amount values for the measurement light and the reference light after removing the disturbance light.
次に、参照光による測定光の補正方法について
説明する。サンプルの色測定を行う際には、ま
ず、標準白板に対する測定を行い、このときにＲ
−LED１，Ｇ−LED２，Ｂ−LED３がそれぞれ
発光するときに得られる測定光の光量値Rw、
Gw、Bwと、参照光の光量値Rw′、Gw′、Bw′と
をマイクロコンピユータ１１に記憶しておく。次
に、サンプルを測定し、反射光の光量値Rr、Gr、
Brと、参照光の光量値Rr′、Br′、とを求めて、
次式の演算によりサンプルの真の色の値を求め
る。 Next, a method of correcting the measurement light using the reference light will be explained. When measuring the color of a sample, first measure against a standard white board, and at this time R
-The light intensity value Rw of the measurement light obtained when LED1, G-LED2, and B-LED3 each emit light,
Gw, Bw and the light quantity values Rw', Gw', Bw' of the reference light are stored in the microcomputer 11. Next, the sample is measured, and the light intensity values of reflected light Rr, Gr,
Br and the light intensity values Rr′, Br′ of the reference light,
The true color value of the sample is determined by calculating the following equation.
Ｒ＝Rw・Rr′／Rw′・Rr×ρr
Ｇ＝Gw・Gw′／Gw′・Gr×ρg
Ｂ＝Bw・Br′／Bw′・Br×ρb
ここにおいて、ρr、ρg、ρbは標準白板のＲ−
LED１，Ｇ−LED２，Ｂ−LED３の各発光色に
対する反射率であり、ρr＝ρg＝ρb＝１としてあ
る。 R=Rw・Rr′／Rw′・Rr×ρr G=Gw・Gw′／Gw′・Gr×ρg B=Bw・Br′／Bw′・Br×ρb Here, ρr, ρg, ρb are standard white boards R-
This is the reflectance for each emission color of LED1, G-LED2, and B-LED3, and ρr=ρg=ρb=1.
以上をようにして、参照光を用いてＲ−LED
１，Ｇ−LED２，Ｂ−LED３の光量変動に対す
る補正を加えた色測定を行うことができるのであ
る。しかも、一つの光伝導体１８の用いて、すべ
てのＲ−LED１，Ｇ−LED２，Ｂ−LED３から
の参照光を参照光用受光素子１０に入射させるこ
とができるから、構成が簡単であり、かつ正確な
補正が行えるのである。 By doing the above, using the reference light, R-LED
1, G-LED 2, and B-LED 3 color measurement can be performed with correction for light intensity fluctuations. Moreover, the reference light from all the R-LEDs 1, G-LEDs 2, and B-LEDs 3 can be made to enter the reference light receiving element 10 using one photoconductor 18, so the configuration is simple. Moreover, accurate correction can be performed.
上記構成では、光伝導体１８を円錐台状として
いるが、円筒形としてもよいのはもちろんのこと
である。 In the above configuration, the photoconductor 18 has a truncated conical shape, but it is of course possible to have a cylindrical shape.
本発明は上述のように、測定面に平行な断面が
円環状である筒状に形成され赤色発光ダイオー
ド、緑色発光ダイオード、青色発光ダイオードか
らの光の一部が壁の内部に導入される光伝導体
と、光伝導体の壁の端面に配設され赤色発光ダイ
オード、緑色発光ダイオード、青色発光ダイオー
ドより光伝導体の壁内を通して伝達された光を受
光する参照光用受光素子を具備しているので、測
定面への照射光の一部を分岐して参照光用受光素
子に入射させ、照射光の光量変動を補償できるよ
うにすることによつて温度変化や経時変化による
測定誤差の発生を抑制することができ、長期に亙
つて色測定を正確に行うことができるという利点
を有する。しかも、参照光を参照光用受光素子に
導く経路に筒状の光伝導体を用いているので、複
数個の光源のそれぞれに光フアイバを用いる場合
に比較して構成が簡単になり安価に提供できると
いう効果を奏するのである。 As described above, the present invention is a light emitting diode that is formed into a cylindrical shape with an annular cross section parallel to the measurement surface, and a part of the light from a red light emitting diode, a green light emitting diode, and a blue light emitting diode is introduced into the inside of the wall. A reference light receiving element is provided on the end face of the wall of the photoconductor and receives light transmitted through the wall of the photoconductor from a red light emitting diode, a green light emitting diode, and a blue light emitting diode. Therefore, by branching a part of the light irradiated onto the measurement surface and making it incident on the reference light receiving element, it is possible to compensate for variations in the light intensity of the irradiation light, thereby eliminating measurement errors caused by temperature changes or changes over time. This has the advantage that color measurements can be carried out accurately over a long period of time. Moreover, since a cylindrical photoconductor is used for the path that guides the reference light to the reference light receiving element, the configuration is simpler and cheaper than when optical fibers are used for each of multiple light sources. This has the effect of making it possible.
さらに、測定光用受光素子と参照光用受光素子
とを同一基板上に配設したものでは、測定光用受
光素子と参照光用受光素子との温度ドリフトによ
る受光感度のばらつきなどを低減することがで
き、補正精度を一層向上できるという効果を奏す
るものである。 Furthermore, when the measuring light receiving element and the reference light receiving element are arranged on the same substrate, variations in light receiving sensitivity due to temperature drift between the measuring light receiving element and the reference light receiving element can be reduced. This has the effect that the correction accuracy can be further improved.
第１図は従来の色測定装置を示す斜視図、第２
図は本発明の実施例を示す一部切欠した斜視図、
第３図は同上の概略断面図、第４図は同上の信号
処理回路のブロツク図、第５図は同上の動作説明
図である。
１……赤色発光ダイオード、２……緑色発光ダ
イオード、３……青色発光ダイオード、４……測
定面、６……測定光用受光素子、１０……参照光
用受光素子、１８……光伝導体。
Figure 1 is a perspective view of a conventional color measuring device;
The figure is a partially cutaway perspective view showing an embodiment of the present invention.
FIG. 3 is a schematic sectional view of the same as the above, FIG. 4 is a block diagram of the signal processing circuit of the same, and FIG. 5 is an explanatory diagram of the operation of the same. 1... Red light emitting diode, 2... Green light emitting diode, 3... Blue light emitting diode, 4... Measurement surface, 6... Light receiving element for measurement light, 10... Light receiving element for reference light, 18... Photoconduction body.
Claims (1)
され測定面を斜めに照射する赤色発光ダイオー
ド、緑色発光ダイオード、青色発光ダイオード
と、測定面での反射光を受光する測定光用受光素
子と、測定面に平行な断面が円環状である筒状に
形成され赤色発光ダイオード、緑色発光ダイオー
ド、青色発光ダイオードからの光の一部が壁の内
部に導入される光伝導体と、光伝導体の壁の端面
に配設され赤色発光ダイオード、緑色発光ダイオ
ード、青色発光ダイオードより光伝導体の壁内を
通して伝達された光を受光する参照光用受光素子
と、測定光用受光素子と参照光用受光素子との出
力に基づいて色測定を行う演算処理部とを具備し
て成ることを特徴とする色測定装置。 ２ 測定光用受光素子と参照光用受光素子とは同
一基板上に配設されて成ることを特徴とする特許
請求の範囲第１項記載の色測定装置。[Scope of Claims] 1 Red, green, and blue light-emitting diodes arranged on a circumference in a plane parallel to the measurement surface and which obliquely illuminate the measurement surface, and which emit light reflected from the measurement surface. A light-receiving element for measuring light is formed in a cylindrical shape with an annular cross-section parallel to the measurement surface, and a portion of the light from the red light-emitting diode, green light-emitting diode, and blue light-emitting diode is introduced into the inside of the wall. a photoconductor; a reference light receiving element disposed on the end face of the wall of the photoconductor that receives light transmitted through the wall of the photoconductor from a red light emitting diode, a green light emitting diode, and a blue light emitting diode; and a measurement device. 1. A color measuring device comprising: an arithmetic processing section that performs color measurement based on outputs of a light receiving element and a reference light receiving element. 2. The color measuring device according to claim 1, wherein the measuring light receiving element and the reference light receiving element are arranged on the same substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57171935A JPS5960324A (en) | 1982-09-30 | 1982-09-30 | Color measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57171935A JPS5960324A (en) | 1982-09-30 | 1982-09-30 | Color measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5960324A JPS5960324A (en) | 1984-04-06 |
| JPH0378568B2 true JPH0378568B2 (en) | 1991-12-16 |
Family
ID=15932552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57171935A Granted JPS5960324A (en) | 1982-09-30 | 1982-09-30 | Color measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5960324A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE87737T1 (en) * | 1987-12-03 | 1993-04-15 | Siemens Ag | COLOR SENSOR ARRANGEMENT FOR DETECTING OBJECTS WITH COLORED SURFACES. |
| DE10246563A1 (en) * | 2002-10-05 | 2004-04-15 | november Aktiengesellschaft Gesellschaft für Molekulare Medizin | Color determination device for determining the colors on a surface, said colors varying dependent on the angle of observation, e.g. for banknote checking, whereby an arrangement of angled light emitters and detectors is used |
| DE102004016829B4 (en) * | 2004-04-01 | 2007-06-06 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for determining the color of bulk material |
| WO2006107915A2 (en) | 2005-04-05 | 2006-10-12 | X-Rite, Incorporated | Systems and methods for monitoring a process output with a highly abridged spectrophotometer |
| EP1877742A2 (en) | 2005-04-12 | 2008-01-16 | X-Rite, Inc. | Systems and methods for measuring a like-color region of an object |
| US7557925B2 (en) | 2005-08-15 | 2009-07-07 | X-Rite, Inc. | Optical instrument and parts thereof for optimally defining light pathways |
| WO2007022212A2 (en) | 2005-08-15 | 2007-02-22 | X-Rite, Incorporated | Spectrophotometer with temperatur corrected system response |
| CN104713644B (en) * | 2013-12-17 | 2017-11-17 | 南开大学 | Waveguide optical illumination colour examining probe |
| US9958329B2 (en) * | 2015-10-08 | 2018-05-01 | Keyence Corporation | Photoelectric switch |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5213885B2 (en) * | 1972-04-17 | 1977-04-18 | ||
| JPS52148183A (en) * | 1976-06-03 | 1977-12-09 | Omron Tateisi Electronics Co | Method of projecting and receiving light for hue inspecting apparatus |
| JPS5313975A (en) * | 1976-07-26 | 1978-02-08 | Dainichiseika Color Chem | Apparatus for measuring color difference |
| JPS5323564B2 (en) * | 1972-10-06 | 1978-07-15 | ||
| US4266878A (en) * | 1978-12-26 | 1981-05-12 | Norlin Industries, Inc. | Apparatus for measurement of soil moisture content |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5813303Y2 (en) * | 1975-07-16 | 1983-03-15 | 株式会社島津製作所 | Bunko Koudokei |
| JPS5323564U (en) * | 1976-08-06 | 1978-02-28 | ||
| JPS5350679U (en) * | 1976-09-30 | 1978-04-28 |
-
1982
- 1982-09-30 JP JP57171935A patent/JPS5960324A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5213885B2 (en) * | 1972-04-17 | 1977-04-18 | ||
| JPS5323564B2 (en) * | 1972-10-06 | 1978-07-15 | ||
| JPS52148183A (en) * | 1976-06-03 | 1977-12-09 | Omron Tateisi Electronics Co | Method of projecting and receiving light for hue inspecting apparatus |
| JPS5313975A (en) * | 1976-07-26 | 1978-02-08 | Dainichiseika Color Chem | Apparatus for measuring color difference |
| US4266878A (en) * | 1978-12-26 | 1981-05-12 | Norlin Industries, Inc. | Apparatus for measurement of soil moisture content |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5960324A (en) | 1984-04-06 |
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