JP6949560B2

JP6949560B2 - Color measuring device and color measuring method

Info

Publication number: JP6949560B2
Application number: JP2017107303A
Authority: JP
Inventors: 直幸高橋
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 2017-05-31
Filing date: 2017-05-31
Publication date: 2021-10-13
Anticipated expiration: 2037-05-31
Also published as: CN108981918B; TWI784003B; TW201903370A; CN108981918A; KR102635430B1; JP2018204992A; KR20180131464A

Description

本発明は、測定対象の色を測定する測色装置及び測色方法に関する。 The present invention relates to a color measuring device and a color measuring method for measuring a color to be measured.

従来、測色装置として、光源から測定対象に光を照射して、測定対象からの反射光を波長毎に分解して測定対象の色を測定するものが知られている（例えば、特許文献１参照）。特許文献１に記載の測色装置は、測定対象に光が照射されて、測定対象からの反射光が回転板に設けられた干渉フィルタを通って受光センサで受光される。回転板には透過波長が異なる複数の干渉フィルタが回転軸回りに設置されており、回転板の回転によって干渉フィルタが順番に切り換えられることで測定対象からの反射光が分光される。そして、透過波長毎の受光センサの受光結果から測定対象の色が測定される。 Conventionally, as a color measuring device, a device that irradiates a measurement target with light from a light source, decomposes the reflected light from the measurement target for each wavelength, and measures the color of the measurement target (for example, Patent Document 1). reference). In the color measuring device described in Patent Document 1, the measurement target is irradiated with light, and the reflected light from the measurement target is received by the light receiving sensor through an interference filter provided on the rotating plate. A plurality of interference filters having different transmission wavelengths are installed around the rotation axis on the rotating plate, and the interference filters are sequentially switched by the rotation of the rotating plate to disperse the reflected light from the measurement target. Then, the color to be measured is measured from the light receiving result of the light receiving sensor for each transmission wavelength.

特開２０１７−０３６９３７号公報JP-A-2017-036937

ところで、上記した測色装置では、機械的な誤差等によって受光センサの中心に対して干渉フィルタの中心が一致する測定タイミングにズレが生じる場合がある。受光センサの中心と干渉フィルタの中心にズレが生じた状態で測定されると、十分な受光量が得られずに測定精度を悪化させてしまう可能性があった。 By the way, in the above-mentioned color measuring device, the measurement timing at which the center of the interference filter coincides with the center of the light receiving sensor may deviate due to a mechanical error or the like. If the measurement is performed in a state where the center of the light receiving sensor and the center of the interference filter are deviated from each other, a sufficient amount of light received may not be obtained and the measurement accuracy may be deteriorated.

本発明はかかる点に鑑みてなされたものであり、受光量を十分に得られる測定タイミングで受光して測定対象の色を精度よく測定することができる測色装置及び測色方法を提供することを目的の１つとする。 The present invention has been made in view of this point, and provides a color measuring device and a color measuring method capable of accurately measuring the color of a measurement target by receiving light at a measurement timing at which a sufficient amount of light is received. Is one of the purposes.

本発明の一態様の測色装置は、測定対象からの反射光に基づいて前記測定対象の色を測定する測色装置であって、光を照射する光源と、測定対象を露出させる開状態と前記測定対象を露出させない閉状態に切り替えられる開口窓を有し、前記開口窓の開状態では、前記光源からの光に前記測定対象からの反射光を含ませて乱反射する一方、前記開口窓の閉状態では、前記光源からの光に前記測定対象からの反射光を含ませないで乱反射する、積分球と、複数の干渉フィルタを周回させて前記積分球からの光を分光する回転板と、前記複数の干渉フィルタで分光された光を受光する受光センサと、前記受光センサのスペクトル分布に基づき、前記受光センサの測定タイミングを理論値から前記スペクトル分布のピークが得られる実測値に補正する補正部とを備え、補正された測定タイミングで前記受光センサが受光した光に基づいて前記測定対象の色を測定する測色部と、を有し、前記補正部は、前記開口窓の閉状態で、前記測定対象からの反射光を含まない前記光に基づいて、前記受光センサの測定タイミングの補正を実行し、前記測色部は、前記開口窓の開状態で、前記測定対象からの反射光を含む前記光に基づいて、前記測定対象の色を測定する、ことを特徴とする。 The color measuring device of one aspect of the present invention is a color measuring device that measures the color of the measurement target based on the reflected light from the measurement target, and has a light source that irradiates light and an open state that exposes the measurement target. It has an opening window that can be switched to a closed state that does not expose the measurement target, and in the open state of the opening window, the light from the light source includes the reflected light from the measurement target and diffusely reflects the opening window. In the closed state, an integrating sphere that diffusely reflects the light from the light source without including the reflected light from the measurement target, and a rotating plate that circulates a plurality of interference filters to disperse the light from the integrating sphere. Correction to correct the measurement timing of the light receiving sensor from the theoretical value to the measured value at which the peak of the spectral distribution can be obtained, based on the light receiving sensor that receives the light dispersed by the plurality of interference filters and the spectral distribution of the light receiving sensor. The correction unit includes a color measuring unit that measures the color of the measurement target based on the light received by the light receiving sensor at the corrected measurement timing, and the correction unit is in a closed state of the opening window. The measurement timing of the light receiving sensor is corrected based on the light that does not include the reflected light from the measurement target, and the color measuring unit is in the open state of the opening window and the reflected light from the measurement target. It is characterized in that the color of the measurement target is measured based on the light including.

本発明の一態様の測色方法は、光源から光を照射するステップと、測定対象を露出させる開状態と前記測定対象を露出させない閉状態に切り替えられる積分球の開口窓の開状態では、前記光源からの光に前記測定対象からの反射光を含ませて前記積分球内で乱反射する一方、前記積分球の開口窓の閉状態では、前記光源からの光に前記測定対象からの反射光を含ませないで前記積分球内で乱反射するステップと、複数の干渉フィルタを周回させて前記積分球からの光を分光するステップと、前記複数の干渉フィルタで分光された光を受光センサで受光するステップと、前記受光センサのスペクトル分布に基づき、前記受光センサの測定タイミングを理論値から前記スペクトル分布のピークが得られる実測値に補正するステップと、補正された測定タイミングで前記受光センサが受光した光に基づいて前記測定対象の色を測定するステップと、を有し、前記補正するステップでは、前記開口窓の閉状態で、前記測定対象からの反射光を含まない前記光に基づいて、前記受光センサの測定タイミングの補正を実行し、前記測定するステップでは、前記開口窓の開状態で、前記測定対象からの反射光を含む前記光に基づいて、前記測定対象の色を測定する、ことを特徴とする。 The color measuring method according to one aspect of the present invention is described in the step of irradiating light from a light source and the open state of the opening window of the integrating sphere that can be switched between an open state in which the measurement target is exposed and a closed state in which the measurement target is not exposed. The light from the light source includes the reflected light from the measurement target and is diffusely reflected in the integrating sphere. On the other hand, when the opening window of the integrating sphere is closed, the light from the light source is reflected from the measurement target. The step of diffusely reflecting light in the integrating sphere without including it, the step of rotating a plurality of interference filters to disperse the light from the integrating sphere, and receiving the light dispersed by the plurality of interference filters with the light receiving sensor. Based on the step and the spectral distribution of the light receiving sensor, the light receiving sensor receives light at the step of correcting the measurement timing of the light receiving sensor from the theoretical value to the actually measured value at which the peak of the spectral distribution is obtained, and the corrected measurement timing. The step of measuring the color of the measurement target based on the light has the step of measuring the color of the measurement target, and in the correction step, the light is not included in the reflected light from the measurement target in the closed state of the opening window. run the correction of the measurement timing of the light receiving sensor, in the step of the measurement, in the open state of the opening window, based on the light including reflected light from the measurement object to measure the color of the measurement object, It is characterized by that.

これらの構成によれば、複数の干渉フィルタの周回によって光源からの光が分光され、干渉フィルタを透過した光のスペクトル分布が求められる。機械的な誤差等によってスペクトル分布のピークに対して受光センサの測定タイミングの理論値にズレが生じても、受光センサの測定タイミングがスペクトル分布のピークが得られる実測値に補正される。よって、スペクトル分布のピークに測定タイミングで測定対象からの反射光を受光し、反射光の受光量を十分に取得して測定対象の色を精度よく測定することができる。 According to these configurations, the light from the light source is dispersed by the circulation of the plurality of interference filters, and the spectral distribution of the light transmitted through the interference filters can be obtained. Even if the theoretical value of the measurement timing of the light receiving sensor deviates from the peak of the spectrum distribution due to mechanical error or the like, the measurement timing of the light receiving sensor is corrected to the measured value at which the peak of the spectrum distribution can be obtained. Therefore, the reflected light from the measurement target can be received at the peak of the spectrum distribution at the measurement timing, and the received amount of the reflected light can be sufficiently acquired to accurately measure the color of the measurement target.

上記の測色装置において、前記回転板は、複数の干渉フィルタ及び抜き穴が設けられた一対の回転板であり、前記一対の回転板のうち、いずれか一方の回転板を停止させ、いずれか他方の回転板を回転させて、前記一方の回転板の抜き穴から前記他方の回転板の複数の干渉フィルタを順番に露出させる。この構成によれば、いずれか一方の回転板の抜き穴といずれか他方の回転板の干渉フィルタによって光源からの光を分光することができる。複数の干渉フィルタを一対の回転板に分散して設けることで、回転板を小さくして装置全体を小型化することができる。 In the color measuring device, the rotary plate is a pair of rotary plates provided with a plurality of interference filters and punch holes, and one of the pair of rotary plates is stopped and any of the rotary plates is stopped. The other rotating plate is rotated to sequentially expose a plurality of interference filters of the other rotating plate from the holes of the one rotating plate. According to this configuration, the light from the light source can be separated by the punch hole of one of the rotating plates and the interference filter of the other rotating plate. By providing a plurality of interference filters dispersedly on a pair of rotating plates, the rotating plates can be made smaller and the entire device can be made smaller.

上記の測色装置において、前記スペクトル分布のピークが得られる実測値と理論値がパルスモータのパルスで示され、前記補正部が、前記受光センサの測定タイミングを理論値のパルスから前記スペクトル分布のピークが得られる実測値のパルスに補正する。この構成によれば、パルスモータのパルス単位で測定タイミングを補正することができる。 In the above color measuring device, the measured value and the theoretical value at which the peak of the spectral distribution is obtained are indicated by the pulse of the pulse motor, and the correction unit sets the measurement timing of the light receiving sensor from the pulse of the theoretical value to the spectral distribution. Correct the pulse to the measured value at which the peak is obtained. According to this configuration, the measurement timing can be corrected for each pulse of the pulse motor.

上記の測色装置において、前記光源がＬＥＤ光源である。この構成によれば、波長毎に光量が安定しないＬＥＤ光源であっても、受光量が大きくなる測定タイミングで測定対象からの反射光を測定することができる。 In the above color measuring device, the light source is an LED light source. According to this configuration, even if the LED light source has an unstable light amount for each wavelength, the reflected light from the measurement target can be measured at the measurement timing when the received light amount becomes large.

本発明によれば、受光センサの測定タイミングを理論値から前記スペクトル分布のピークが得られる実測値に補正することで、測定対象からの反射光を十分に受光して測定精度を向上させることができる。 According to the present invention, by correcting the measurement timing of the light receiving sensor from the theoretical value to the actually measured value at which the peak of the spectral distribution can be obtained, it is possible to sufficiently receive the reflected light from the measurement target and improve the measurement accuracy. can.

本実施の形態の測色装置の斜視図である。It is a perspective view of the color measuring apparatus of this embodiment. 本実施の形態の測色装置の縦断面図である。It is a vertical cross-sectional view of the color measuring apparatus of this embodiment. 本実施の形態の測色装置の横断面図である。It is a cross-sectional view of the color measuring apparatus of this embodiment. 本実施の形態の分光器の上面模式図及び断面模式図である。It is a top view and a cross-sectional schematic view of the spectroscope of this embodiment. 本実施の形態の光源特性の一例を示す図である。It is a figure which shows an example of the light source characteristic of this embodiment. 本実施の形態の複数の干渉フィルタの透過特性の一例を示す図である。It is a figure which shows an example of the transmission characteristic of the plurality of interference filters of this embodiment. 本実施の形態の受光センサの出力特性の一例を示す図である。It is a figure which shows an example of the output characteristic of the light receiving sensor of this embodiment. 本実施の形態の測定タイミングの補正処理の一例を示す図である。It is a figure which shows an example of the correction process of the measurement timing of this embodiment. 本実施の形態の測色装置による測定方法の一例を示す図である。It is a figure which shows an example of the measuring method by the color measuring device of this embodiment.

以下、添付図面を参照して、本実施の形態の測色装置について説明する。図１は、本実施の形態の測色装置の斜視図である。なお、本実施の形態の測色装置は一例に過ぎず、適宜変更が可能である。 Hereinafter, the color measuring device of the present embodiment will be described with reference to the attached drawings. FIG. 1 is a perspective view of the color measuring device of the present embodiment. The color measuring device of this embodiment is only an example, and can be changed as appropriate.

図１に示すように、測色装置１は、分光測色方式で測定対象Ｗを測色するものであり、測定対象Ｗに光源２１（図２参照）から光を当てて、測定対象Ｗからの反射光を分光して色を測定するように構成される。測色装置１の装置カバー１１の上面には、測定対象Ｗが載せられる載置面１２が設けられており、載置面１２には測定対象Ｗを装置カバー１１内に露出する開口窓１３（図２参照）が形成されている。装置カバー１１の前側には、各種情報の入力を受け付ける操作パネル１４と、各種メニューを表示するＬＣＤ（Liquid Crystal Display）１５とが配置されている。 As shown in FIG. 1, the color measuring device 1 measures the color of the measurement target W by a spectral color measurement method, and irradiates the measurement target W with light from the light source 21 (see FIG. 2) from the measurement target W. It is configured to measure the color by dispersing the reflected light of. A mounting surface 12 on which the measurement target W is placed is provided on the upper surface of the device cover 11 of the color measuring device 1, and the opening window 13 (on which the measurement target W is exposed inside the device cover 11) is provided on the mounting surface 12. (See FIG. 2) is formed. On the front side of the device cover 11, an operation panel 14 for receiving input of various information and an LCD (Liquid Crystal Display) 15 for displaying various menus are arranged.

図２及び図３に示すように、装置カバー１１内には、測定対象Ｗに向けて光を照射する光源２１が設けられている。光源２１としては、例えば、寿命が長い白色ＬＥＤ（Light Emitting Diode）、近紫外ＬＥＤ、近赤外ＬＥＤが用いられている。３種類のＬＥＤを使用することによって、白色ＬＥＤで光量が小さくなる短波長端及び長波長端の近辺の光量を大きくしている。光源２１からの光はハーフミラー２２で分岐されて、ハーフミラー２２を透過した光は第１、第２のレンズ２３、２４を通じて積分球２５に入力され、ハーフミラー２２で反射した光は光源２１の変化を監視する受光センサ２６で受光される。 As shown in FIGS. 2 and 3, a light source 21 that irradiates light toward the measurement target W is provided in the device cover 11. As the light source 21, for example, a white LED (Light Emitting Diode), a near-ultraviolet LED, and a near-infrared LED having a long life are used. By using three types of LEDs, the amount of light in the vicinity of the short wavelength end and the long wavelength end where the amount of light is small in the white LED is increased. The light from the light source 21 is branched by the half mirror 22, the light transmitted through the half mirror 22 is input to the integrating sphere 25 through the first and second lenses 23 and 24, and the light reflected by the half mirror 22 is the light source 21. The light is received by the light receiving sensor 26 that monitors the change in the light.

積分球２５の上部は装置カバー１１の開口窓１３が開口され、開口窓１３を通じて測定対象Ｗが積分球２５内に部分的に露出している。積分球２５に入った光は乱反射され、開口窓１３を通じて測定対象Ｗに対してあらゆる方向から光が当てられる。これにより、測定対象Ｗの凹凸形状の影響が減らされている。積分球２５の下部には、測定対象Ｗの正反射を抑えるトラップ用開口３１と、測定対象Ｗからの反射光を取り込む受光用開口３４とが設けられている。トラップ用開口３１にはトラップ部材３２が設けられており、測定対象Ｗで受光用開口３４に正反射しないようにトラップ部材３２で一部の光が除去される。 An opening window 13 of the device cover 11 is opened in the upper part of the integrating sphere 25, and the measurement target W is partially exposed in the integrating sphere 25 through the opening window 13. The light that has entered the integrating sphere 25 is diffusely reflected, and the light is applied to the measurement target W from all directions through the opening window 13. As a result, the influence of the uneven shape of the measurement target W is reduced. At the lower part of the integrating sphere 25, a trap opening 31 for suppressing the specular reflection of the measurement target W and a light receiving opening 34 for taking in the reflected light from the measurement target W are provided. A trap member 32 is provided in the trap opening 31, and a part of the light is removed by the trap member 32 so as not to be specularly reflected by the light receiving opening 34 at the measurement target W.

また、積分球２５の下部には、トラップ用開口３１を開閉するトラップ用反射板３３が設けられている。トラップ用反射板３３の開閉によって正反射成分を含むＳＣＩ（Specular Components Include）方式、正反射成分を除去したＳＣＥ（Specular Components Exclude）方式に測色装置１の測定方法が切り換えられる。受光用開口３４に入った反射光は第３のレンズ３５でミラー３６に集光され、ミラー３６で反射された反射光は第４のレンズ３７で受光センサ３８に向けて集光される。第４のレンズ３７と受光センサ３８の間には、一対の回転板４２によって測定対象Ｗからの反射光を分光する分光器４１が設けられている。 Further, a trap reflector 33 for opening and closing the trap opening 31 is provided below the integrating sphere 25. By opening and closing the trap reflector 33, the measurement method of the color measuring device 1 is switched between the SCI (Specular Components Include) method including the specular reflection component and the SCE (Specular Components Exclude) method in which the specular reflection component is removed. The reflected light entering the light receiving opening 34 is collected by the third lens 35 on the mirror 36, and the reflected light reflected by the mirror 36 is collected by the fourth lens 37 toward the light receiving sensor 38. A spectroscope 41 that disperses the reflected light from the measurement target W by a pair of rotating plates 42 is provided between the fourth lens 37 and the light receiving sensor 38.

分光器４１は、一対のパルスモータ４３（図２では１つだけ図示）の各出力軸に一対の回転板４２を取り付けて構成されている。各回転板４２には、それぞれ透過波長が異なる複数の干渉フィルタ４５及び抜き穴４６（図４Ａ参照）が設けられている。一対の回転板４２によって複数の干渉フィルタ４５が周回され、反射光の光路に複数の干渉フィルタ４５が順番に位置付けられる。このように、複数の干渉フィルタ４５が周回されて、透過波長が切り換えられることで、測定対象Ｗからの反射光が分光される。なお、分光器４１の詳細構成については後述する。 The spectroscope 41 is configured by attaching a pair of rotating plates 42 to each output shaft of a pair of pulse motors 43 (only one is shown in FIG. 2). Each rotating plate 42 is provided with a plurality of interference filters 45 and punch holes 46 (see FIG. 4A) having different transmission wavelengths. A plurality of interference filters 45 are circulated by the pair of rotating plates 42, and the plurality of interference filters 45 are sequentially positioned in the optical path of the reflected light. In this way, the plurality of interference filters 45 are circulated and the transmission wavelength is switched, so that the reflected light from the measurement target W is dispersed. The detailed configuration of the spectroscope 41 will be described later.

受光センサ３８には、複数の干渉フィルタ４５によって分光された反射光が受光される。受光センサ３８は、フォトセンサ等の光電変換素子であり、分光された反射光毎のセンサ値（受光量）を制御基板５１に出力している。制御基板５１には、補正部５２（図４参照）や測色部５３（図４参照）等の各部が設けられている。補正部５２及び測色部５３は、各所処理を実行するプロセッサやメモリ等によって構成されている。メモリは、用途に応じてＲＯＭ(Read Only Memory)、ＲＡＭ（Random Access Memory）等の一つ又は複数の記憶媒体で構成されており、メモリには測色方法を実施する制御プログラム等が記憶されている。 The light receiving sensor 38 receives the reflected light dispersed by the plurality of interference filters 45. The light receiving sensor 38 is a photoelectric conversion element such as a photo sensor, and outputs a sensor value (light receiving amount) for each dispersed reflected light to the control board 51. The control board 51 is provided with various parts such as a correction unit 52 (see FIG. 4) and a color measurement unit 53 (see FIG. 4). The correction unit 52 and the color measurement unit 53 are composed of a processor, a memory, and the like that execute various processing. The memory is composed of one or more storage media such as ROM (Read Only Memory) and RAM (Random Access Memory) depending on the application, and the memory stores a control program or the like for performing a color measurement method. ing.

このように構成された測色装置１では、受光センサ３８の中心に対して干渉フィルタ４５の中心が一致するタイミングで受光センサ３８の受光量がピークになっている。しかしながら、一対の回転板４２の組み付けや干渉フィルタ４５の寸法公差等で機械的な誤差が生じると、受光センサ３８の中心に干渉フィルタ４５の中心が一致する測定タイミングに前後のズレが生じる。このため、機械的な誤差を考慮しない理論上の測定タイミングでは、受光センサ３８の中心に対して干渉フィルタ４５の中心が位置ズレした測定タイミングで測定されて受光センサ３８の受光量が少なくなる。 In the color measuring device 1 configured in this way, the light receiving amount of the light receiving sensor 38 peaks at the timing when the center of the interference filter 45 coincides with the center of the light receiving sensor 38. However, if a mechanical error occurs due to the assembly of the pair of rotating plates 42, the dimensional tolerance of the interference filter 45, or the like, the measurement timing at which the center of the interference filter 45 coincides with the center of the light receiving sensor 38 is shifted back and forth. Therefore, in the theoretical measurement timing that does not consider the mechanical error, the light receiving amount of the light receiving sensor 38 is reduced because the measurement is performed at the measurement timing in which the center of the interference filter 45 is displaced with respect to the center of the light receiving sensor 38.

特に、ＬＥＤ光源等の光源２１では、波長毎に光量が不安定であり、一部の波長では光量が極端に小さくなっている。このため、十分な光量が得られない波長で測定タイミングにズレが生じると、受光センサ３８では十分な受光量が得られず、測定精度が悪化する恐れがある。そこで、本実施の形態では、受光センサ３８のスペクトル分布のピークが得られる測定タイミングの実測値を求め、受光センサ３８の測定タイミングを理論値から実測値に補正して、スペクトル分布のピークに測定タイミングを合わせるようにしている。 In particular, in a light source 21 such as an LED light source, the amount of light is unstable for each wavelength, and the amount of light is extremely small at some wavelengths. Therefore, if the measurement timing is deviated at a wavelength at which a sufficient amount of light cannot be obtained, the light receiving sensor 38 may not be able to obtain a sufficient amount of light received, and the measurement accuracy may deteriorate. Therefore, in the present embodiment, the measured value of the measurement timing at which the peak of the spectral distribution of the light receiving sensor 38 is obtained is obtained, the measurement timing of the light receiving sensor 38 is corrected from the theoretical value to the measured value, and the measurement is performed at the peak of the spectral distribution. I try to match the timing.

以下、図４を参照して、分光器について説明する。図４は、本実施の形態の分光器の上面模式図及び断面模式図である。 Hereinafter, the spectroscope will be described with reference to FIG. FIG. 4 is a schematic top view and a schematic cross-sectional view of the spectroscope of the present embodiment.

図４Ａ及び図４Ｂに示すように、分光器４１の一対の回転板４２は、複数の干渉フィルタ４５及び１つの抜き穴４６が周方向に並んだ円板であり、受光センサ３８に向かう光路上で部分的に重なるように配置されている。一対の回転板４２の中心にはパルスモータ４３の出力軸４４が固定されており、パルスモータ４３によって一対の回転板４２が出力軸４４を中心に回転される。このとき、一方の回転板４２は抜き穴４６を光路に位置付けた状態で停止され、他方の回転板４２だけが回転されて、一方の回転板４２の抜き穴４６から他方の回転板４２の複数の干渉フィルタ４５が順番に露出される。 As shown in FIGS. 4A and 4B, the pair of rotating plates 42 of the spectroscope 41 is a disk in which a plurality of interference filters 45 and one punch hole 46 are arranged in the circumferential direction, and is on an optical path toward the light receiving sensor 38. It is arranged so that it partially overlaps with. The output shaft 44 of the pulse motor 43 is fixed to the center of the pair of rotating plates 42, and the pulse motor 43 rotates the pair of rotating plates 42 around the output shaft 44. At this time, one rotating plate 42 is stopped with the extraction hole 46 positioned in the optical path, only the other rotation plate 42 is rotated, and the plurality of rotation plates 42 of the other rotation plate 42 are rotated from the extraction hole 46 of one rotation plate 42. Interference filters 45 are exposed in order.

このように、透過波長が異なる干渉フィルタ４５によって受光センサ３８に向かう光路が横切られて、抜き穴４６及び干渉フィルタ４５を透過した光が透過波長毎に分光される。そして、複数の干渉フィルタ４５で分光された光が受光センサ３８で受光される。よって、一方の回転板４２の抜き穴４６と他方の回転板４２の干渉フィルタ４５によって光源２１（図２参照）からの光を分光することができる。また、複数の干渉フィルタ４５を一対の回転板４２に分散して設けることで、回転板４２を小さくして、測色装置１全体を小型化することが可能になっている。 In this way, the optical path toward the light receiving sensor 38 is crossed by the interference filters 45 having different transmission wavelengths, and the light transmitted through the punch holes 46 and the interference filter 45 is dispersed for each transmission wavelength. Then, the light dispersed by the plurality of interference filters 45 is received by the light receiving sensor 38. Therefore, the light from the light source 21 (see FIG. 2) can be separated by the punch hole 46 of one rotating plate 42 and the interference filter 45 of the other rotating plate 42. Further, by providing the plurality of interference filters 45 in a distributed manner on the pair of rotating plates 42, the rotating plates 42 can be made smaller and the entire color measuring device 1 can be made smaller.

また、受光センサ３８には、機械的な誤差等に起因した受光センサ３８の測定タイミングのズレを補正する補正部５２と、補正された測定タイミングで測定対象Ｗからの反射光を受光して測定対象Ｗの色を測定する測色部５３とが接続されている。補正部５２による測定タイミングの補正時には、積分球２５（図２参照）の開口窓１３が閉じられて、光源２１からの光を測定対象Ｗで反射させることなく受光センサ３８に連続的に受光させている。補正部５２は、受光センサ３８のスペクトル分布に基づき、受光センサ３８の測定タイミングを理論値からスペクトル分布のピークが得られる実測値に補正する。 Further, the light receiving sensor 38 has a correction unit 52 that corrects a deviation in the measurement timing of the light receiving sensor 38 due to a mechanical error or the like, and receives the reflected light from the measurement target W at the corrected measurement timing for measurement. A color measuring unit 53 for measuring the color of the target W is connected. When the correction unit 52 corrects the measurement timing, the opening window 13 of the integrating sphere 25 (see FIG. 2) is closed, and the light from the light source 21 is continuously received by the light receiving sensor 38 without being reflected by the measurement target W. ing. Based on the spectral distribution of the light receiving sensor 38, the correction unit 52 corrects the measurement timing of the light receiving sensor 38 from the theoretical value to the actually measured value at which the peak of the spectral distribution can be obtained.

測色部５３による測定対象Ｗの色の測定時には、積分球２５（図２参照）の開口窓１３が開けられて、光源２１から測定対象Ｗに光を照射して、測定対象Ｗからの反射光を受光センサ３８に受光させている。測色部５３は、補正された測定タイミングで測定対象Ｗからの反射光を受光センサ３８で間欠的に受光して測定対象Ｗの色を測定する。測色部５３では、測定タイミング（透過波長）における受光センサ３８のセンサ値に対して各種処理が施されて、ＸＹＺ表色系、Ｌ^＊a^＊ｂ^＊表色系、Ｌ^＊Ｃ^＊ｈ^＊表色系等の値に変換されて測定対象Ｗの色が数値で表される。 When the color of the measurement target W is measured by the color measuring unit 53, the opening window 13 of the integrating sphere 25 (see FIG. 2) is opened, the light source 21 irradiates the measurement target W with light, and the light is reflected from the measurement target W. Light is received by the light receiving sensor 38. The color measuring unit 53 intermittently receives the reflected light from the measurement target W by the light receiving sensor 38 at the corrected measurement timing, and measures the color of the measurement target W. In the color measuring unit 53, various processes are applied to the sensor value of the light receiving sensor 38 at the measurement timing (transmission wavelength), and the XYZ color system, L ^* a ^* b ^* color system, L ^* C ^* h ^* The color of the measurement target W is represented by a numerical value after being converted into a value such as a color system.

次に、図５から図８を参照して、測定タイミングの補正処理について説明する。図５は、本実施の形態の光源特性の一例を示す図である。図６は、本実施の形態の複数の干渉フィルタの透過特性の一例を示す図である。図７は、本実施の形態の受光センサの出力特性の一例を示す図である。図８は、本実施の形態の測定タイミングの補正処理の一例を示す図である。なお、図５から図８では光源として白色ＬＥＤを使用した場合を示している。なお、ここでは、説明の便宜上、図２及び図３の符号を適宜使用して説明する。 Next, the measurement timing correction process will be described with reference to FIGS. 5 to 8. FIG. 5 is a diagram showing an example of the light source characteristics of the present embodiment. FIG. 6 is a diagram showing an example of transmission characteristics of the plurality of interference filters of the present embodiment. FIG. 7 is a diagram showing an example of the output characteristics of the light receiving sensor of the present embodiment. FIG. 8 is a diagram showing an example of the measurement timing correction process of the present embodiment. Note that FIGS. 5 to 8 show a case where a white LED is used as a light source. Here, for convenience of explanation, the reference numerals of FIGS. 2 and 3 will be appropriately used for description.

図５に示すように、光源２１は、短波長側に急峻な山形のスペクトルを持ち、中波長から長波長にかけて緩やかな山形のスペクトルを持っている。また、図６に示すように、複数の干渉フィルタ４５には所定間隔で透過波長域が設定されている。このため、光源２１からの光を複数の干渉フィルタ４５を介して受光センサ３８が受光すると、図７に示すように、受光センサ３８のスペクトル分布に干渉フィルタ４５の透過波長毎に急峻なピークが現れる。スペクトル分布のピークで受光センサ３８の受光量が大きくなるため、スペクトル分布のピークが得られる測定タイミングで測定することが好ましい。 As shown in FIG. 5, the light source 21 has a steep chevron spectrum on the short wavelength side and a gentle chevron spectrum from the medium wavelength to the long wavelength. Further, as shown in FIG. 6, transmission wavelength ranges are set at predetermined intervals in the plurality of interference filters 45. Therefore, when the light receiving sensor 38 receives the light from the light source 21 through the plurality of interference filters 45, a steep peak appears in the spectral distribution of the light receiving sensor 38 for each transmission wavelength of the interference filter 45, as shown in FIG. appear. Since the amount of light received by the light receiving sensor 38 increases at the peak of the spectral distribution, it is preferable to perform measurement at the measurement timing at which the peak of the spectral distribution is obtained.

この場合、一対の回転板４２の駆動源がパルスモータ４３であるため、一対の回転板４２を１パルスずつ回転させながら、複数の干渉フィルタ４５を透過した光が受光センサ３８で受光される。したがって、スペクトル分布のピーク、すなわち受光センサ３８の測定タイミングがパルスモータ４３のパルスで示される。測色装置１には機械的な誤差が生じない状況で理論上の測定タイミングが設定されているが、実際には機械的な誤差が僅かながら生じているため、理論上の測定タイミングでは受光センサ３８の中心に干渉フィルタ４５の中心が一致しない。 In this case, since the drive source of the pair of rotating plates 42 is the pulse motor 43, the light transmitted through the plurality of interference filters 45 is received by the light receiving sensor 38 while rotating the pair of rotating plates 42 one pulse at a time. Therefore, the peak of the spectral distribution, that is, the measurement timing of the light receiving sensor 38 is indicated by the pulse of the pulse motor 43. The theoretical measurement timing is set in the color measuring device 1 in a situation where no mechanical error occurs, but since a slight mechanical error actually occurs, the light receiving sensor is set at the theoretical measurement timing. The center of the interference filter 45 does not match the center of 38.

このため、図８に示すように、受光センサ３８の測定タイミング（測定トリガ）に対して補正処理が実施される。測定タイミングの補正処理では、パルスモータ４３で１パルスずつ回転板４２を回転させながら、光源２１からの光が干渉フィルタ４５を介して受光センサ３８で連続的に受光される。これにより、複数の急峻なピークを持った反射光のスペクトルが求められる。事前に測定タイミングの理論値がパルスモータ４３のパルスで１００パルス置きに設定されているが、実際のスペクトル分布のピークに対して測定タイミングの理論値が数パルスだけ前後にずれている。 Therefore, as shown in FIG. 8, the correction process is performed on the measurement timing (measurement trigger) of the light receiving sensor 38. In the measurement timing correction process, the light from the light source 21 is continuously received by the light receiving sensor 38 via the interference filter 45 while the rotating plate 42 is rotated one pulse at a time by the pulse motor 43. As a result, a spectrum of reflected light having a plurality of steep peaks can be obtained. The theoretical value of the measurement timing is set in advance every 100 pulses for the pulse of the pulse motor 43, but the theoretical value of the measurement timing deviates back and forth by several pulses with respect to the peak of the actual spectrum distribution.

このとき、補正部５２によってスペクトル分布のピークが得られるパルスが実測値として求められ、受光センサ３８の測定タイミングが理論値から実測値に補正される。具体的には、理論値として設定された５０パルス、１５０パルス、２５０パルス…が、スペクトル分布のピークを示す実測値である５２パルス、１５１パルス、２５１パルス…に補正される。そして、補正された測定タイミングで測定対象Ｗの反射光が受光センサ３８で間欠的に受光されて、測色部５３によって所定波長の受光センサ３８の受光量から測定対象Ｗの色が測定される。 At this time, the correction unit 52 obtains the pulse at which the peak of the spectral distribution is obtained as the measured value, and the measurement timing of the light receiving sensor 38 is corrected from the theoretical value to the measured value. Specifically, the 50 pulses, 150 pulses, 250 pulses, etc. set as theoretical values are corrected to 52 pulses, 151 pulses, 251 pulses, etc., which are actually measured values indicating the peak of the spectral distribution. Then, the reflected light of the measurement target W is intermittently received by the light receiving sensor 38 at the corrected measurement timing, and the color of the measurement target W is measured by the color measuring unit 53 from the light receiving amount of the light receiving sensor 38 having a predetermined wavelength. ..

続いて、図９を参照して、測色装置による測定方法について説明する。図９は、本実施の形態の測色装置による測定方法の一例を示す図である。 Subsequently, a measurement method using the color measuring device will be described with reference to FIG. FIG. 9 is a diagram showing an example of a measurement method using the color measuring device of the present embodiment.

図９Ａに示すように、測定タイミングの補正時には、積分球２５の開口窓１３が閉じられており、光源２１からの光が第１、第２のレンズ２３、２４を介して積分球２５に入力されて、光源２１からの光が積分球２５で乱反射される。積分球２５で乱反射した光は第３のレンズ３５によってミラー３６に集光され、第４のレンズ３７によって分光器４１を介して受光センサ３８に集光される。分光器４１では、一方の回転板４２の抜き穴４６が光路に位置付けられた状態で、他方の回転板４２が回転される。これにより、光源２１からの光が複数の干渉フィルタ４５の周回によって分光されて受光センサ３８で受光される。 As shown in FIG. 9A, when the measurement timing is corrected, the opening window 13 of the integrating sphere 25 is closed, and the light from the light source 21 is input to the integrating sphere 25 via the first and second lenses 23 and 24. Then, the light from the light source 21 is diffusely reflected by the integrating sphere 25. The light diffusely reflected by the integrating sphere 25 is focused on the mirror 36 by the third lens 35, and is focused on the light receiving sensor 38 by the fourth lens 37 via the spectroscope 41. In the spectroscope 41, the other rotating plate 42 is rotated while the punch hole 46 of one rotating plate 42 is positioned in the optical path. As a result, the light from the light source 21 is separated by the circulation of the plurality of interference filters 45 and received by the light receiving sensor 38.

図９Ｂに示すように、回転板４２が１パルスずつ回転された状態で、干渉フィルタ４５を透過した光が受光センサ３８によって連続的に受光される。これにより、受光センサ３８のスペクトル分布が生成される。このとき、受光センサ３８の測定タイミングとして所定パルス置きに理論値が設定されているが、受光センサ３８のスペクトル分布のピークに対して理論値が数パルスだけずれている。補正部５２では、受光センサ３８のスペクトル分布に基づき、受光センサ３８の測定タイミングが理論値からスペクトル分布のピークが得られる実測値に補正される。 As shown in FIG. 9B, the light transmitted through the interference filter 45 is continuously received by the light receiving sensor 38 in a state where the rotating plate 42 is rotated one pulse at a time. As a result, the spectral distribution of the light receiving sensor 38 is generated. At this time, the theoretical value is set at predetermined pulse intervals as the measurement timing of the light receiving sensor 38, but the theoretical value deviates from the peak of the spectral distribution of the light receiving sensor 38 by several pulses. In the correction unit 52, the measurement timing of the light receiving sensor 38 is corrected from the theoretical value to the actually measured value at which the peak of the spectral distribution is obtained, based on the spectral distribution of the light receiving sensor 38.

図９Ｃに示すように、測定対象Ｗの色の測定時には、積分球２５の開口窓１３が開かれて、開口窓１３から積分球２５に測定対象Ｗが露出される。光源２１からの光が第１、第２のレンズ２３、２４を介して積分球２５に入力され、光源２１からの光が積分球２５で乱反射されて開口窓１３を介して測定対象Ｗに照射される。測定対象Ｗからの反射光は第３のレンズ３５によってミラー３６に集光され、第４のレンズ３７によって分光器４１を介して受光センサ３８に集光される。測定対象Ｗからの反射光は分光器４１の複数の干渉フィルタ４５によって分光される。そして、補正された測定タイミングで測定対象Ｗからの反射光が受光センサ３８で間欠的に受光されて、測定対象Ｗの色が測定される。 As shown in FIG. 9C, when measuring the color of the measurement target W, the opening window 13 of the integrating sphere 25 is opened, and the measurement target W is exposed from the opening window 13 to the integrating sphere 25. The light from the light source 21 is input to the integrating sphere 25 via the first and second lenses 23 and 24, and the light from the light source 21 is diffusely reflected by the integrating sphere 25 and irradiates the measurement target W through the opening window 13. Will be done. The reflected light from the measurement target W is focused on the mirror 36 by the third lens 35, and is focused on the light receiving sensor 38 by the fourth lens 37 via the spectroscope 41. The reflected light from the measurement target W is separated by a plurality of interference filters 45 of the spectroscope 41. Then, the reflected light from the measurement target W is intermittently received by the light receiving sensor 38 at the corrected measurement timing, and the color of the measurement target W is measured.

以上のように、本実施の形態の測色装置１では、複数の干渉フィルタ４５の周回によって光源２１からの光が分光され、干渉フィルタ４５を透過した光のスペクトル分布が求められる。機械的な誤差等によってスペクトル分布のピークに対して受光センサ３８の測定タイミングの理論値にズレが生じても、受光センサの測定タイミングがスペクトル分布のピークが得られる実測値に補正される。よって、スペクトル分布のピークに測定タイミングで測定対象Ｗからの反射光を受光し、反射光の受光量を十分に取得して測定対象Ｗの色を精度よく測定することができる。 As described above, in the color measuring device 1 of the present embodiment, the light from the light source 21 is dispersed by the circulation of the plurality of interference filters 45, and the spectral distribution of the light transmitted through the interference filters 45 is obtained. Even if the theoretical value of the measurement timing of the light receiving sensor 38 deviates from the peak of the spectrum distribution due to a mechanical error or the like, the measurement timing of the light receiving sensor is corrected to the actually measured value at which the peak of the spectrum distribution can be obtained. Therefore, the reflected light from the measurement target W can be received at the peak of the spectrum distribution at the measurement timing, and the received amount of the reflected light can be sufficiently acquired to accurately measure the color of the measurement target W.

なお、本実施の形態において、測定対象の反射光を含まない光で測定タイミングを補正する構成を例示したが、測定対象の反射光を含む光で測定タイミングを補正してもよい。この場合、補正部による測定タイミングの補正時に、開口窓を開けて光源から測定対象に光を照射し、測定対象の反射光を含む光源からの光を受光センサで受光する。そして、補正部が、受光センサのスペクトル分布に基づき、受光センサの測定タイミングを理論値からスペクトル分布のピークが得られる実測値に補正するようにする。これにより、測定対象からの反射光を利用して、測定タイミングを補正することができる。 In the present embodiment, the configuration in which the measurement timing is corrected by the light that does not include the reflected light of the measurement target is illustrated, but the measurement timing may be corrected by the light that includes the reflected light of the measurement target. In this case, when the correction unit corrects the measurement timing, the opening window is opened to irradiate the measurement target with light from the light source, and the light receiving sensor receives the light from the light source including the reflected light of the measurement target. Then, the correction unit corrects the measurement timing of the light receiving sensor from the theoretical value to the actually measured value at which the peak of the spectral distribution can be obtained, based on the spectral distribution of the light receiving sensor. As a result, the measurement timing can be corrected by using the reflected light from the measurement target.

また、本実施の形態において、複数の干渉フィルタ及び抜き穴が設けられた一対の回転板によって光源からの光を分光する構成にしたが、この構成に限定されない。回転板の数は特に限定されるものではなく、単一の回転板に設けられた複数の干渉フィルタで光源からの光を分光してもよいし、３つ以上の回転板に設けられた複数の干渉フィルタで光源からの光を分光してもよい。 Further, in the present embodiment, the configuration is such that the light from the light source is separated by a pair of rotating plates provided with a plurality of interference filters and holes, but the present invention is not limited to this configuration. The number of rotating plates is not particularly limited, and the light from the light source may be separated by a plurality of interference filters provided on a single rotating plate, or a plurality of rotating plates provided on three or more rotating plates. The light from the light source may be separated by the interference filter of.

また、本実施の形態において、回転板がパルスモータで駆動される構成にしたが、この構成に限定されない。回転板は、回転可能な構成であればよく、サーボモータ等の他のロータリーアクチュエータで駆動されてもよい。 Further, in the present embodiment, the rotating plate is driven by a pulse motor, but the present invention is not limited to this configuration. The rotating plate may be driven by another rotary actuator such as a servomotor as long as it has a rotatable configuration.

また、本実施の形態において、光源がＬＥＤである構成にしたが、この構成に限定されない。光源は、測定対象を照射可能であれば、どのように構成されてもよい。例えば、光源として白熱発光タイプ、放電発光タイプ、電界発光タイプのいずれのタイプの光源が用いられてもよい。白熱発光タイプの光源としては、例えば、白熱電球、ハロゲンランプが用いられてもよいし、放電発光タイプの光源としては、例えば、蛍光灯、ＨＩＤランプが用いられてもよいし、電界発光タイプの光源としては、例えば、有機ＥＬ、無機ＥＬが用いられてもよい。 Further, in the present embodiment, the light source is an LED, but the present invention is not limited to this configuration. The light source may be configured in any way as long as it can irradiate the measurement target. For example, any type of light source such as an incandescent light source, a discharge light source, or an electroluminescent type may be used as the light source. As the incandescent light source, for example, an incandescent lamp or a halogen lamp may be used, and as the discharge light source, for example, a fluorescent lamp or an HID lamp may be used, or an electroluminescent type light source. As the light source, for example, organic EL or inorganic EL may be used.

また、本発明の実施の形態及び変形例を説明したが、本発明の他の実施の形態として、上記実施の形態及び変形例を全体的又は部分的に組み合わせたものでもよい。 Further, although the embodiments and modifications of the present invention have been described, other embodiments of the present invention may be a combination of the above-described embodiments and modifications in whole or in part.

また、本発明の実施の形態は上記の実施の形態及び変形例に限定されるものではなく、本発明の技術的思想の趣旨を逸脱しない範囲において様々に変更、置換、変形されてもよい。さらには、技術の進歩又は派生する別技術によって、本発明の技術的思想を別の仕方で実現することができれば、その方法を用いて実施されてもよい。したがって、特許請求の範囲は、本発明の技術的思想の範囲内に含まれ得る全ての実施態様をカバーしている。 Further, the embodiment of the present invention is not limited to the above-described embodiment and modification, and may be variously modified, replaced, or modified without departing from the spirit of the technical idea of the present invention. Furthermore, if the technical idea of the present invention can be realized in another way by the advancement of technology or another technology derived from it, it may be carried out by using that method. Therefore, the scope of claims covers all embodiments that may be included within the scope of the technical idea of the present invention.

さらに、上記実施形態では、測定対象からの反射光に基づいて測定対象の色を測定する測色装置であって、光を照射する光源と、複数の干渉フィルタを周回させて光源からの光を分光する回転板と、複数の干渉フィルタで分光された光を受光する受光センサと、受光センサのスペクトル分布に基づき、受光センサの測定タイミングを理論値からスペクトル分布のピークが得られる実測値に補正する補正部とを備え、補正された測定タイミングで測定対象からの反射光を受光センサで受光して、測定対象の色を測定することを特徴とする。この構成によれば、複数の干渉フィルタの周回によって光源からの光が分光され、干渉フィルタを透過した光のスペクトル分布が求められる。機械的な誤差等によってスペクトル分布のピークに対して受光センサの測定タイミングの理論値にズレが生じても、受光センサの測定タイミングがスペクトル分布のピークが得られる実測値に補正される。よって、スペクトル分布のピークに測定タイミングで測定対象からの反射光を受光し、反射光の受光量を十分に取得して測定対象の色を精度よく測定することができる。 Further, in the above embodiment, it is a color measuring device that measures the color of the measurement target based on the reflected light from the measurement target, and emits the light from the light source by rotating a light source that irradiates the light and a plurality of interference filters. Based on the spectrum distribution of the rotating plate that disperses, the light receiving sensor that receives the light dispersed by multiple interference filters, and the light receiving sensor, the measurement timing of the light receiving sensor is corrected from the theoretical value to the measured value that gives the peak of the spectral distribution. It is characterized in that it is provided with a correction unit for measuring the color of the measurement target by receiving the reflected light from the measurement target with a light receiving sensor at the corrected measurement timing. According to this configuration, the light from the light source is dispersed by the circuit of the plurality of interference filters, and the spectral distribution of the light transmitted through the interference filters can be obtained. Even if the theoretical value of the measurement timing of the light receiving sensor deviates from the peak of the spectrum distribution due to mechanical error or the like, the measurement timing of the light receiving sensor is corrected to the measured value at which the peak of the spectrum distribution can be obtained. Therefore, the reflected light from the measurement target can be received at the peak of the spectrum distribution at the measurement timing, and the received amount of the reflected light can be sufficiently acquired to accurately measure the color of the measurement target.

以上説明したように、本発明は、受光量を十分に得られる測定タイミングで受光して測定対象の色を精度よく測定することができるという効果を有し、特に、分光測定方式の測色装置及び測色方法に有用である。 As described above, the present invention has the effect of being able to accurately measure the color of the measurement target by receiving light at a measurement timing at which a sufficient amount of light is received, and in particular, a color measuring device of a spectroscopic measurement method. And useful for colorimetric methods.

１測色装置
２１光源
３８受光センサ
４１分光器
４２回転板
４３パルスモータ
４４出力軸
４５干渉フィルタ
４６抜き穴
５２補正部
５３測色部
Ｗ測定対象 1 Color measuring device 21 Light source 38 Light receiving sensor 41 Spectrometer 42 Rotating plate 43 Pulse motor 44 Output shaft 45 Interference filter 46 Drilling hole 52 Correction unit 53 Color measuring unit W Measurement target

Claims

A light source that irradiates light and
It has an opening window that can be switched between an open state that exposes the measurement target and a closed state that does not expose the measurement target. On the other hand, in the closed state of the opening window, the integrating sphere is diffusely reflected without including the reflected light from the measurement target in the light from the light source.
A rotating plate that orbits a plurality of interference filters to disperse light from the integrating sphere, and
A light receiving sensor that receives light dispersed by the plurality of interference filters, and a light receiving sensor.
Based on the spectral distribution of the light receiving sensor, a correction unit that corrects the measurement timing of the light receiving sensor from a theoretical value to an actually measured value at which the peak of the spectral distribution can be obtained.
It has a color measuring unit that measures the color of the measurement target based on the light received by the light receiving sensor at the corrected measurement timing.
The correction unit corrects the measurement timing of the light receiving sensor based on the light that does not include the reflected light from the measurement target in the closed state of the opening window.
The color measuring unit measures the color of the measurement target based on the light including the reflected light from the measurement target in the open state of the opening window.
A color measuring device characterized by this.

The rotary plate is a pair of rotary plates provided with a plurality of interference filters and punch holes.
Of the pair of rotating plates, one of the rotating plates is stopped, one of the rotating plates is rotated, and a plurality of interference filters of the other rotating plate are sequentially inserted from the holes of the one rotating plate. The color measuring device according to claim 1, wherein the color measuring device is exposed to.

The measured value and the theoretical value at which the peak of the spectral distribution is obtained are shown by the pulse of the pulse motor.
The color measuring device according to claim 1 or 2, wherein the correction unit corrects the measurement timing of the light receiving sensor from a pulse of a theoretical value to a pulse of an actually measured value at which a peak of the spectral distribution is obtained.

The color measuring device according to any one of claims 1 to 3, wherein the light source is an LED light source.

The step of irradiating light from a light source and
In the open state of the opening window of the integrating sphere that can be switched between the open state in which the measurement target is exposed and the closed state in which the measurement target is not exposed, the light from the light source includes the reflected light from the measurement target in the integrating sphere. in while irregular reflection, in the closed state of the opening window of the integrating sphere, the steps of irregularly reflected within the integrating sphere without moistened with reflected light from the measuring object to the light from the light source,
A step of orbiting a plurality of interference filters to disperse the light from the integrating sphere, and
The step of receiving the light dispersed by the plurality of interference filters with the light receiving sensor,
Based on the spectral distribution of the light receiving sensor, the step of correcting the measurement timing of the light receiving sensor from the theoretical value to the actually measured value at which the peak of the spectral distribution can be obtained.
It has a step of measuring the color of the measurement target based on the light received by the light receiving sensor at the corrected measurement timing.
In the correction step, the measurement timing of the light receiving sensor is corrected based on the light that does not include the reflected light from the measurement target in the closed state of the opening window.
In the step of measurement, in the open state of the opening window, based on the light including reflected light from the measurement object to measure the color of the measurement object,
A color measurement method characterized by that.