WO2016165268A1 - 一种光谱反馈调光比色灯箱 - Google Patents

一种光谱反馈调光比色灯箱 Download PDF

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WO2016165268A1
WO2016165268A1 PCT/CN2015/089376 CN2015089376W WO2016165268A1 WO 2016165268 A1 WO2016165268 A1 WO 2016165268A1 CN 2015089376 W CN2015089376 W CN 2015089376W WO 2016165268 A1 WO2016165268 A1 WO 2016165268A1
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light source
spectral
feedback
spectrum
measuring device
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PCT/CN2015/089376
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English (en)
French (fr)
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潘建根
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杭州远方光电信息股份有限公司
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Priority claimed from CN201510182570.1A external-priority patent/CN104777106A/zh
Priority claimed from CN201520235210.9U external-priority patent/CN204924914U/zh
Application filed by 杭州远方光电信息股份有限公司 filed Critical 杭州远方光电信息股份有限公司
Publication of WO2016165268A1 publication Critical patent/WO2016165268A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands

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  • the invention relates to the field of color detection, and in particular to a spectral feedback dimming color light box.
  • the color measuring device is primarily used for color inspection in the textile, printing and coatings industries.
  • a method and apparatus for simulating a high quality fluorescent lamp spectrum is disclosed in the patent publication No. 8 592 748 B2, which requires storing a plurality of tristimulus values of a plurality of LED light sources at a preset operating temperature as their color characteristics in a memory. And the operating temperature and PWM (pulse width modulation) value are given, and when the subsequent measurement result does not coincide with the stored value, the light source having the previous value is repeatedly driven at the same temperature at a predetermined cycle frequency.
  • the spectral matching technical solution needs to store a large amount of data as a reference value in advance, and the feedback process is cumbersome and time consuming.
  • the spectral power distribution of the fitted light source still has a large difference from the target spectrum, and the resulting light source is emitted. Whether the spectral power distribution meets the preset requirements cannot be effectively verified.
  • the present invention aims to provide a spectral feedback dimming color light box with adjustable light source luminescence spectrum, which has the characteristics of verifiable adjustment result, high precision and wide application range.
  • a spectral feedback dimming color light box comprising: a spectrum measuring device, a feedback adjusting device and a adjustable light source group, wherein the spectrum measuring device measures the light emitted by the adjustable light source group The spectral information, the feedback adjustment device adjusts the illumination of the tunable light source group based on the spectral information measured by the spectral measurement device.
  • the invention measures the spectral information emitted by the light source group in real time by setting the spectrum measuring device; according to the spectral information measured by the spectral measuring device, the feedback control mechanism formed by the feedback adjusting device, the adjustable light source group and the spectrum measuring device is used to adjust the light source in real time.
  • the illumination of the group is such that the spectral power distribution emitted by the light source group satisfies the predetermined preset requirements.
  • the spectral feedback dimming color light box of the adjustable light source luminescence spectrum can achieve a high color rendering index and realize a plurality of different Spectral score
  • the light source of the cloth is illuminated, and the spectrum emitted by the light source group can be completely confirmed and confirmed, ensuring the reliability of the adjustment, with high precision and wide application range.
  • the feedback adjustment device includes a signal processing unit and a light source control unit, and the signal processing unit and the light source control unit are electrically connected; the signal processing unit analyzes and processes the light source spectrum and the target spectrum measured by the spectrum measuring device. Differences and feedback of the processed signals to the light source control unit.
  • the independently adjustable light source in the adjustable light source group can be controlled by the light source control unit, and the control action can be the adjustment of off, on, and the intensity of the illumination, and the light source control unit can control one or more of the desired adjustable light source groups. The light source is turned on, off, and the intensity of the light source is adjusted;
  • the signal processing unit first parses the difference between the measured light source spectrum and the target spectrum, wherein the spectral information of the target light source may be pre-stored in the signal processing unit, and when the signal processing unit receives the measured spectrum transmitted from the spectral measuring unit Data, that is, the two are parsed and compared, and the difference is regulated by a preset program, and then the control processing signal is fed back to the light source control unit, and the light source control unit controls the opening of the corresponding light source in the adjustable light source group. , off or illuminating; two types of units cooperate to adjust the spectral deviation of the measured source spectrum and the target source to match the target spectrum.
  • the adjustable light source group includes more than one independently adjustable light source, and the independently adjustable light source emits a specific spectrum with adjustable light intensity.
  • the independently adjustable light source in the above adjustable light source group may include various light sources such as an LED light source, a fluorescent light, a D65 light source, a D50 light source, a CWF light source, an A light source, a TL84 light source, an F light source, and a UV light source, etc., to meet the current international The actual measurement needs in China improve the reliability of colorimetry.
  • the independent adjustable light source is required to be adjustable in intensity, that is, the spectral power distribution changes with the intensity of the light.
  • the invention can realize the observation of the sample under standard lighting conditions or a specific observation environment by flexibly combining the type of the light source and the intensity of the light emission, satisfying different test requirements, and having good expandability and universality.
  • the spectrum of the tunable light source set completely covers the entire visible light band from 380 nm to 780 nm to simulate a general viewing environment.
  • some samples may undergo a specific reaction under the illumination of a certain wavelength source, such as some elements in the dye change after being irradiated by UV light. Therefore, for different test samples, the adjustable light source group The band that the total spectrum should cover will vary.
  • the light source control unit includes a plurality of independent program-controlled driving units, and the independent program-controlled driving unit independently controls the opening and closing of the adjustable light source and the adjustment of the intensity of the light.
  • the light source control unit can control one or more adjustable light sources in the desired adjustable light source group to turn on, off, and adjust the light intensity. Since the light source has different spectral distribution characteristics under different luminous intensities, the adjustment of the spectral distribution can be realized by changing the luminous intensity.
  • the following methods can be used to control the intensity of the light source: taking the LED light source as an example , adjust the power of the LED light source
  • the flow or voltage is used to change the intensity of the illumination of the LED light source; or the change in the intensity of the LED light source is achieved by PWM pulse with modulation.
  • the method of controlling the spectral power distribution of the light source also changes.
  • the present invention is described with reference only to the adjustment mode of the light-emitting diodes.
  • the adjustable light source group sequentially adjusts the luminous intensity of each independently adjustable light source according to the feedback processing signal.
  • the above technical solution can obtain a spectral source that is close to or consistent with the target spectrum by the following spectral feedback dimming colorimetric light source spectral adjustment method, and is characterized in that the following optimization algorithm is included:
  • the signal processing unit in the feedback adjusting device calculates the next C i (V j ) according to the following formula:
  • C i (U j ) is the adjustment factor of the jth time of the i-th light source in the adjustable light source group, i and j are arbitrary positive integers;
  • S mix ( ⁇ , U j-1 ) is an adjustable light source group Spectra,
  • S target ( ⁇ ) is the target spectrum, ⁇ is the wavelength, and ⁇ is the adjustment step size;
  • the light source control unit controls the opening, closing and strength adjustment of the corresponding light source in the adjustable light source group according to the feedback signal of the signal processing unit;
  • the adjustment coefficient C i (V j ) here can be set as a voltage adjustment coefficient or a current adjustment coefficient.
  • the specific adjustment amount can be different, such as adjusting the power, etc., which is described herein only with reference to the LED light source.
  • a 1 , A 2 , and A 3 are preset error values, that is, at the end of the iteration, three conditions are simultaneously satisfied: 1.
  • the sum of the measured spectrum and the target spectral deviation is less than the preset tolerance A 1 ;
  • the maximum value of the deviation between the measured spectrum and the target spectrum is less than the preset tolerance A 2 ; 3.
  • the absolute value of the deviation between the measured spectrum and the target spectrum is less than the preset tolerance A 3 .
  • a 1 , A 2 , and A 3 can be individually set according to the needs of the user, and various precision requirements can be adjusted.
  • the invention not only enables color comparison under standard light sources, but also achieves color evaluation under a particular spectral source.
  • the present invention can store a large amount of test data as a reference value in advance, and can automatically realize the automatic adjustment of the illumination source by the actual measurement of the spectrum of the light source and the real-time feedback regulation mechanism, and the high-quality spectrum of the target light source is simulated, and the control speed is fast. High accuracy, wide application range and powerful functions.
  • said spectrometric device is a spectroradiometer.
  • the spectrum measuring device determines the spectral information (spectral power distribution) emitted by the adjustable light source group in the box, and the feedback adjusting device adjusts the spectral information measured by the spectrum measuring device, and combines the target spectral information to adjust the adjustable light source to emit light, and repeatedly Measurement and feedback adjustment control until the spectral information measured by the spectrometry device is sufficiently close to the target spectral information.
  • a box body is further included, and the spectrum measuring device, the feedback adjusting device and the adjustable light source group are all disposed in the box body.
  • Each device is arranged in a box body with high integration degree, integrated design and convenient operation.
  • the spectrum measuring device is disposed under the adjustable light source group and can be moved, and the spectral measuring device measures the spectral power distribution at any accessible position in the box.
  • a variety of measurement functions are realized by flexible setting of the spectrum measuring device.
  • a slot is provided in the wall of the housing, and the spectrum measuring device slides along the slot in the wall. Through the slotting on the wall panel, the spectrum measuring device can be moved to any position in the box for measurement, which has the characteristics of high flexibility and convenient operation.
  • the display screen is set, and the adjustment results displayed on the display screen include color rendering index, color temperature, and spectral power distribution data and curves.
  • a display screen, a button or a touch screen is arranged on the box for human-computer interaction, and a computer interface or a wireless receiving device can be arranged on the box for the spectral feedback dimming ratio of the illuminating spectrum of the adjustable light source.
  • the light box exchanges information with the outside world.
  • the display content includes but is not limited to: relative spectral power distribution, color temperature, color rendering index, chromaticity diagram, black body trajectory, color tolerance range and other luminosity and chromaticity measurement results as well as the name and usage time of the activated light source.
  • the display can be set on the light box, or it can be set separately to communicate information with the light box by wired or wireless.
  • the present invention realizes the automatic adjustment of the illuminating light source by setting the spectrum measuring device, the tunable light source, and the real-time feedback control mechanism of the feedback adjusting device, so that the spectral power distribution emitted by the light source satisfies the predetermined preset. It is required to realize a high color rendering index, which can accurately simulate the generation of light sources of various types and occasions, and the spectrum of the used light source can be confirmed by real-time measurement, which ensures the reliability of the adjustment result; a large amount of light source data can be stored without pre-storing , It can quickly realize the accurate adjustment of the spectrum of the light source and improve the test speed.
  • the spectrum measuring device through flexible setting of the spectrum measuring device, it can realize diversified measurement functions, featuring fast regulation, high accuracy, wide application range and powerful functions. It is used in various occasions where it is necessary to adjust the spectrum of the light source, such as color evaluation.
  • Embodiment 1 is a schematic view of Embodiment 1.
  • 1-spectral measuring device 2-feedback adjusting device; 21-signal processing unit; 22-light source control unit; 3-adjustable light source group; 4-box; 5-display.
  • the embodiment discloses a spectral feedback dimming color light box, which comprises a spectrum measuring device 1, a feedback adjusting device 2, an adjustable light source group 3, a box 4 and a display screen 5.
  • the spectrum measuring device 1, the feedback adjusting device 2 and the adjustable light source group 3 are all disposed in the box 4, and the display screen 5 is disposed on the box 4.
  • the adjustable light source group 3 is composed of a red LED, a green LED, a blue LED and a fluorescent lamp, and the spectrum measuring device 1 is a spectral radiometer; the feedback adjusting device 2 is connected to the display screen 5, and the feedback adjusting device 2 includes a signal.
  • the processing unit 21 and the light source control unit 22, the spectral processing information of the target light source is pre-stored in the signal processing unit 21, the signal processing unit 21 is connected to the light source control unit 22, and the signal processing unit 21 is connected to the spectrum measuring device 1, and the signal processing unit 21, analyzing and processing the difference information between the spectrum and the target spectrum measured by the spectrum measuring device 1, and feeding back the processing result of the difference portion to the light source control unit 22, the light source control unit 22 is connected to the adjustable light source group 3, and the light source control unit 22
  • the opening and closing of each of the independently adjustable light sources in the adjustable light source group 3 and the adjustment of the intensity of the light emission are separately driven according to the adjustment information fed back by the signal processing unit 21.
  • the adjustment of the spectrum of the adjustable light source group 3 is realized to match the target spectrum, and the homochromatic phenomenon caused by the different light sources during the test process is alleviated, and the reliability of the color comparison is ensured. And authenticity.
  • the measurement information displayed on the display screen 5 includes the color rendering index, color temperature and spectral power distribution curve of the total light source in the light source spectral feedback dimming color light box after the end of debugging, and other information including the name and use of the activated light source. Time and so on.
  • the adjustable light source group includes one or more LED light sources.
  • Each voltage adjustable coefficient C i (V j ) is set for each independently adjustable light source in the adjustable light source group 3, and the initial value C i (V 0 ) is set, generally set to 1;
  • the signal processing unit 21 in the feedback adjusting device 2 calculates the next C i (V j ) according to the following formula:
  • C i (U j ) is the voltage adjustment coefficient of the jth time of the i-th light source in the adjustable light source group 3, i and j are arbitrary positive integers;
  • S mix ( ⁇ , U j-1 ) is adjustable The spectrum of the light source group 3,
  • S target ( ⁇ ) is the target spectrum, ⁇ is the wavelength, and ⁇ is the adjustment step size;
  • the light source control unit 22 controls the opening, closing and strength adjustment of the corresponding light source in the adjustable light source group 3 according to the feedback signal of the signal processing unit 21;
  • a 1 , A 2 , and A 3 are preset error values.

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Abstract

一种光谱反馈调光比色灯箱，通过设置光谱测量装置（1），利用反馈调节装置（2）的实时反馈调节机制，实现对发光光源光谱的调节，使得光源所发出的光谱功率分布满足既定的预设要求，实现较高的显色性指数，可准确模拟产生多种类型和场合的光源；在整个过程中，光源的发光光谱是实测的，保证了调节结果的可靠性；无需预先存储大量光源数据，即可准确实现对光源发光光谱的调节；此外通过灵活设置光谱测量装置（1），实现多样化的测量功能，具有调控速度快、准确度高、适用范围广、功能强大等特点，可广泛应用于颜色评定等需多种光源光谱照明条件的场合。

Description

一种光谱反馈调光比色灯箱 【技术领域】
本发明涉及颜色检测领域，具体涉及一种光谱反馈调光比色灯箱。
【背景技术】
在现代工业中，对同类产品颜色的一致性和准确性有着越来越高的要求。随着科学技术的不断发展，对产品颜色的检验从最初依靠检验人员在普通光照下通过肉眼对被测样品和标准比色卡进行比对，以判别被测样品与标准比色卡之间的颜色偏差，逐渐发展到将被测样品和标准比色卡置于内置标准光源的颜色测定装置内进行检验。标准光源常用于模拟各种环境光线下的人造光源，目前常用的有D65光源、D50光源、CWF光源、A光源、TL84光源、F光源和UV光源等组合形成光源组，这些组合光源在一定程度上可以克服或者辨别由于环境光源差异造成的被测样品与对比物体颜色差异的现象，即同色异谱现象(metamerism)，让生产工厂或实验室非现场也能获得在与这些特定环境下的光源基本一致的照明效果，颜色测定装置主要用于纺织、印刷和涂料工业中的颜色检验。
公开号为US 8592748 B2的专利中公开了一种模拟高质量日光灯光谱的方法和装置，该技术方案需要在存储器中存储大量的LED光源在预设工作温度下的三刺激值作为其颜色特征，并且赋予其工作温度以及PWM(脉冲宽度调变)值，当其后的测量结果与存储值不一致时，在预先设定好的循环频率下，反复在相同温度下驱动之前值有问题的光源。此光谱匹配技术方案预先需要存储大量的数据作为参考值，反馈过程繁琐且耗时，此外，拟合后的光源光谱功率分布与目标光谱依然存在较大的差异，且最终得到的光源所发出的光谱功率分布是否满足预设要求无法有效验证。
【发明内容】
针对上述现有技术的不足，本发明旨在提供一种可调光源发光光谱的光谱反馈调光比色灯箱，具有调节结果可验证、精度高、适用范围广等特点。
本发明是通过以下技术方案实现的：一种光谱反馈调光比色灯箱，其特征在于，包括光谱测量装置、反馈调节装置和可调光源组，光谱测量装置测定可调光源组所发出光的光谱信息，反馈调节装置根据光谱测量装置测得的光谱信息调节可调光源组的发光。
本发明通过设置光谱测量装置，实时测量光源组所发出的光谱信息；根据光谱测量装置测得的光谱信息，利用反馈调节装置、可调光源组与光谱测量装置形成的反馈控制机制，实时调节光源组的发光，使得光源组所发出的光谱功率分布满足既定的预设要求，这种可调光源发光光谱的光谱反馈调光比色灯箱可以实现很高的显色性指数，以及实现多种不同光谱分 布的光源照明，同时对光源组所发出的光谱完全可以测量确认，保证了调节的可靠性，具有精度高，适用范围广等特点。
本发明还可通过以下技术方案进一步限定和完善：
作为一种技术方案，所述的反馈调节装置包括信号处理单元和光源控制单元，信号处理单元和光源控制单元电连接；信号处理单元解析、处理经光谱测量装置测得的光源光谱与目标光谱的差异，并将处理信号反馈至光源控制单元。可调光源组中的独立可调光源可以被光源控制单元控制，控制动作可以是关闭、打开和发光强弱的调节，光源控制单元可以控制所需的可调光源组中的某一个或者多个光源开启、关闭和光源发光强弱的调节；
信号处理单元首先解析所述测得的光源光谱与目标光谱的差异，其中所述的目标光源的光谱信息可预先存储在信号处理单元中，当信号处理单元接收到来自光谱测量单元传输的实测光谱数据，即开始对两者进行解析和比对，并通过预设程序对所述差异进行调控，随后将调控处理信号反馈至光源控制单元，光源控制单元再控制可调光源组中相应光源的开启、关闭或发光强弱；两类单元配合以实施对实测光源光谱与目标光源光谱偏差的调整，以匹配目标光谱。
作为一种技术方案，所述的可调光源组包括一个以上独立可调光源，所述独立可调光源发出发光强弱可调的特定光谱。上述可调光源组中的独立可调光源可以包括LED光源、荧光灯、D65光源、D50光源、CWF光源、A光源、TL84光源、F光源和UV光源等在内的多种光源，以满足目前国际国内的实际测量需求，提高比色的可靠性。需要指出的是，要求所述的独立可调光源发光强弱可调，也即光谱功率分布随发光强弱变化而变化。本发明通过灵活组合光源的类型及其发光强弱，可实现在标准照明条件或者特定观察环境下对样品进行观测，满足不同的测试需求，可扩展性和普适性好。
作为优选，所述的可调光源组的光谱完全覆盖整个可见光波段380nm-780nm，以模拟一般观察环境。然而，某些被测样品在一定波长光源的照射下会发生某种特定的反应，如染料中某些元素经UV光照射后发生变化，因而，针对不同的测试样品，所述可调光源组的总光谱应覆盖的波段也会有所不同。
作为一种技术方案，所述的光源控制单元包括多个独立的程控驱动单元，独立的程控驱动单元独立控制可调光源的开启、关闭以及发光强弱的调节。光源控制单元可以控制所需的可调光源组中的某一个或者多个可调光源开启、关闭和调节发光强弱。由于光源在不同的发光强度下具有不同的光谱分布特性，因而改变发光强度即可实现对光谱分布的调整，其中可通过以下几种优选方式实现对光源发光强弱的控制：以LED光源为例，调整LED光源的电 流或电压以改变LED光源的发光强度；或者通过LED光源的脉冲调制(PWM Pulse with modulation)实现LED光源强度的改变。当然，所用光源不同时，控制光源光谱功率分布的方法也随之变化，本发明仅参照发光二极管的调节方式来叙述。此外，在程控驱动单元的控制下，可调光源组根据反馈的处理信号依次调节各个独立可调光源的发光强度。
上述技术方案可以通过以下光谱反馈调光比色灯箱光源光谱调节的方法获得与目标光谱相近或者相一致的光谱源，其特征在于，包括以下优化算法：
a、给可调光源组中每个独立可调光源设置一个调节系数Ci(Vj)，设置初始值Ci(V0)，一般设为1；
b、根据光谱测量装置测得的可调光源组的光谱，反馈调节装置中的信号处理单元根据下式计算下一个Ci(Vj)：
Figure PCTCN2015089376-appb-000001
其中，Ci(Uj)为可调光源组中的第i个光源第j次的调节系数，i、j均为任意正整数；Smix(λ,Uj-1)为可调光源组的光谱，Starget(λ)为目标光谱，λ为波长，μ为调节步长；
c、光源控制单元根据信号处理单元的反馈信号控制可调光源组中相应光源的开启、关闭及强弱调节；
d、重复测量可调光源组的光谱，直至同时满足以下条件，停止迭代运算：
Figure PCTCN2015089376-appb-000002
|Smix(λj)-Starget(λ)|max≤A2  (1-3)
Figure PCTCN2015089376-appb-000003
以LED光源为例，这里的调节系数Ci(Vj)可设置为电压调节系数或者电流调节系数。针对不同的光源，具体的调节量值可以不同，如调节功率等，本文仅参照LED光源来叙述。此外，A1、A2、A3为预设的误差值，即迭代结束时，需同时满足三个条件：1、测得光谱与目标光谱偏差的总和小于预设容差A1；2、测得光谱与目标光谱的偏差的最大值小于预设容差A2；3、前后两次测得光谱与目标光谱的偏差的绝对值小于预设容差A3。需要指出的是，如仅采用测得光谱与目标光谱的偏差的绝对值不再变化或小于特定值的判定方式，依然存在实 际测得光谱与目标光谱的依然存在未调节完成的可能。A1、A2、A3可根据使用者的需要分别设定，实现各种精度需求的调节。
本发明不仅可以实现在标准光源下的颜色比对，还可实现在特定光谱光源下的颜色评定。此外，本发明可以不预先存储大量测试数据作为参考值，通过光源光谱的实测和实时反馈调控机制，即可快速实现照明光源的自动调节，高质量的模拟了目标光源光谱，具有调控速度快、准确度高、适用范围广、功能强大等特点。
本发明还可通过以下技术方案进一步限定和完善：
作为优选，所述的光谱测量装置为光谱辐射计。光谱测量装置测定箱体中可调光源组所发出的光谱信息(光谱功率分布)，反馈调节装置根据光谱测量装置测得的光谱信息，并结合目标光谱信息，调节可调光源发光，多次反复测量与反馈调节控制，直到光谱测量装置所测量到的光谱信息足够接近目标光谱信息。
作为一种技术方案，还包括箱体，所述的光谱测量装置、反馈调节装置和可调光源组均设置在箱体内。各个装置均设置在一个箱体内，集成化程度高、设计一体化、操作方便。
作为一种技术方案，所述的光谱测量装置设置在可调光源组的下方且可以移动，光谱测量装置在箱体内测量任意可以移达位置处的光谱功率分布。通过灵活的设置光谱测量装置，实现多样化的测量功能。
作为优选，在所述的箱体内的壁板上设有开槽，光谱测量装置沿壁板上的开槽滑动。通过壁板上的开槽，光谱测量装置可以移动至箱体内任意可以移达位置处进行测量，具有灵活性高、操作便捷等特点。
作为一种技术方案，设置显示屏，显示屏上显示的调节结果包括显色指数、色温和光谱功率分布数据与曲线等。为了方便操作，在箱体上设置显示屏，按键，或者触摸屏，用于人机互动，也可以在箱体上设置电脑接口或者无线接收装置，用于可调光源发光光谱的光谱反馈调光比色灯箱与外界的信息交换。显示内容包括但不限于：相对光谱功率分布、色温、显色性指数、色品图、黑体轨迹、颜色容差范围等光度和色度测量结果以及已启动光源的名称和使用时间。显示屏可以设置在灯箱上，也可以单独设置，通过有线或者无线，与灯箱相互传递信息。
综上所述，本发明通过设置光谱测量装置，配合可调光源，利用反馈调节装置的实时反馈控制机制，实现了对发光光源的自动调节，使得光源所发出的光谱功率分布满足既定的预设要求，实现很高的显色性指数，可准确模拟产生多种类型和场合的光源，同时所用光源的光谱可以通过实时测量得以确认，保证了调节结果的可靠性；可以不预先存储大量光源数据， 即可快速实现光源光谱的准确调节，提高测试速度；此外，通过灵活设置光谱测量装置，实现多样化的测量功能，具有调控速度快、准确度高、适用范围广、功能强大等特点，可广泛应用于颜色评定等需调节光源光谱的各种场合。
【附图说明】
附图1是实施例1的示意图。
1-光谱测量装置；2-反馈调节装置；21-信号处理单元；22-光源控制单元；3-可调光源组；4-箱体；5-显示屏。
【具体实施方式】
实施例1
如图1所示，本实施例公开了一种光谱反馈调光比色灯箱，包括光谱测量装置1、反馈调节装置2、可调光源组3、箱体4和显示屏5。其中光谱测量装置1、反馈调节装置2和可调光源组3均设置在箱体4内，显示屏5设置在箱体4上。
本实施例中，可调光源组3由红色LED、绿色LED、蓝色LED和荧光灯组成，光谱测量装置1为光谱辐射计；反馈调节装置2与显示屏5连接，反馈调节装置2中包括信号处理单元21和光源控制单元22，信号处理单元21中预先存储有目标光源的光谱信息，信号处理单元21和光源控制单元22相连接，信号处理单元21与光谱测量装置1相连接，信号处理单元21解析、处理经光谱测量装置1测定的光谱与目标光谱的差异信息，将对差异部分的处理结果反馈至光源控制单元22，光源控制单元22与可调光源组3相连接，光源控制单元22根据信号处理单元21反馈的调节信息对可调光源组3中的各个独立可调光源的开启、关闭和发光强弱的调节实施单独驱动。通过反馈调节装置2与光谱测量装置1的配合，实现对可调光源组3光谱的调节，以匹配目标光谱，减轻测试过程中由于光源不同造成的同色异谱现象，保证颜色比对的可靠性和真实性。
调节结束后，显示屏5上显示的测量信息包括调试结束后光源光谱反馈调光比色灯箱中总光源的显色性指数、色温和光谱功率分布曲线，其他信息包括已启动光源的名称和使用时间等。
实施例2
本实施例通过反馈控制单元2中的信号处理单元21和光源控制单元22，调节可调光源组3中各个发光光源的强弱，可实现模拟目标光源光谱。其中可调光源组中包括一个或者一个以上的LED光源。
具体的调节步骤如下：
a.给可调光源组3中每个独立可调光源设置一个电压调节系数Ci(Vj)，设置初始值Ci(V0)，一般设为1；
b.根据光谱测量装置1测得的可调光源组3的光谱，反馈调节装置2中的信号处理单元21根据下式计算下一个Ci(Vj)：
Figure PCTCN2015089376-appb-000004
其中，Ci(Uj)为可调光源组3中的第i个光源第j次的电压调节系数，i、j均为任意正整数；Smix(λ,Uj-1)为可调光源组3的光谱，Starget(λ)为目标光谱，λ为波长，μ为调节步长；
c.光源控制单元22根据信号处理单元21的反馈信号控制可调光源组3中相应光源的开启、关闭及强弱调节；
d.重复测量可调光源组3的光谱，直至同时满足以下条件，停止迭代运算：
Figure PCTCN2015089376-appb-000005
|Smix(λj)-Starget(λ)|max≤A2  (1-3)
Figure PCTCN2015089376-appb-000006
其中，A1、A2、A3为预设的误差值。
需要强调的是，以上仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (10)

  1. 一种光谱反馈调光比色灯箱，其特征在于，包括光谱测量装置(1)、反馈调节装置(2)和可调光源组(3)，光谱测量装置(1)测定可调光源组(3)所发出光的光谱信息，反馈调节装置(2)根据光谱测量装置(1)测得的光谱信息调节可调光源组(3)的发光。
  2. 如权利要求1所述的光谱反馈调光比色灯箱，其特征在于，所述的反馈调节装置(2)包括信号处理单元(21)和光源控制单元(22)，信号处理单元(21)和光源控制单元(22)相连接；信号处理单元(21)解析、处理经光谱测量装置(1)测定的光源光谱与目标光谱的差异，并将处理信号反馈至光源控制单元(22)。
  3. 如权利要求1所述的光谱反馈调光比色灯箱，其特征在于，所述的可调光源组(3)包括一个以上独立可调光源，所述独立可调光源发出发光强弱可调的特定光谱。
  4. 如权利要求2或3所述的光谱反馈调光比色灯箱，其特征在于，所述的光源控制单元(22)包括多个独立的程控驱动单元，独立的程控驱动单元独立控制可调光源的开启、关闭以及发光强弱的调节。
  5. 如权利要求1所述的光谱反馈调光比色灯箱，其特征在于，所述的光谱测量装置(1)为光谱辐射计。
  6. 如权利要求1所述的光谱反馈调光比色灯箱，其特征在于，包括箱体(4)，所述的光谱测量装置(1)、反馈调节装置(2)和可调光源组(3)均设置在箱体(4)内。
  7. 如权利要求1所述的光谱反馈调光比色灯箱，其特征在于，所述的光谱测量装置(1)设置在可调光源组(3)的下方且可以移动，光谱测量装置(1)在箱体(4)内测量任意可以移达位置处的光谱分布。
  8. 如权利要求7所述的光谱反馈调光比色灯箱，其特征在于，所述的箱体(4)内的壁板上设有开槽，光谱测量装置(1)沿壁板上的开槽滑动。
  9. 如权利要求1所述的光谱反馈调光比色灯箱，其特征在于，设置显示屏(5)，显示屏(5)上显示的调节结果包括显色指数、色温和光谱功率分布数据与曲线等。
  10. 一种光谱反馈调光比色灯箱的光源光谱调节方法，其特征在于，包括以下步骤：
    a.给可调光源组(3)中每个独立可调光源设置一个调节系数Ci(Vj)，设置初始值Ci(V0)；
    b.根据光谱测量装置(1)测得的可调光源组(3)的光谱，反馈调节装置(2)中的信号处理单元(21)根据预设调节公式计算下一个Ci(Vj)：
    c.光源控制单元(22)根据信号处理单元(21)的反馈信号控制可调光源组(3)中相应光源的开启、关闭及强弱调节；
    d.重复测量可调光源组(3)的光谱并进行迭代运算，直至满足预设条件，停止迭代运算，完成调节。
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