WO2016165269A1 - Appareil permettant de mesurer des propriétés optiques d'un objet - Google Patents

Appareil permettant de mesurer des propriétés optiques d'un objet Download PDF

Info

Publication number
WO2016165269A1
WO2016165269A1 PCT/CN2015/089377 CN2015089377W WO2016165269A1 WO 2016165269 A1 WO2016165269 A1 WO 2016165269A1 CN 2015089377 W CN2015089377 W CN 2015089377W WO 2016165269 A1 WO2016165269 A1 WO 2016165269A1
Authority
WO
WIPO (PCT)
Prior art keywords
light source
led
light
electrical parameter
measuring device
Prior art date
Application number
PCT/CN2015/089377
Other languages
English (en)
Chinese (zh)
Inventor
潘建根
黄英
Original Assignee
杭州远方光电信息股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN201510170696.7A external-priority patent/CN104792710B/zh
Priority claimed from CN201520216703.8U external-priority patent/CN204924913U/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 WO2016165269A1 publication Critical patent/WO2016165269A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands

Definitions

  • the invention relates to the field of object optical property detection, and in particular to an object reflectivity, transmittance and color measuring device.
  • Optical properties measurement is widely used in the quality control of chemical, food, plastic, paint, construction and other industries.
  • Traditional optical characteristics measurement such as color control, is judged by visual observation of the sample by the operator.
  • the judgment result is strongly subjective, and the evaluation result may also vary with time, environment or personnel, resulting in evaluation. There is a greater risk of inaccuracy.
  • the modernization of science and technology has also led to the continuous improvement of the level of optical property measurement. From the previous relying on visual judgment to modern color management with specific instruments, the evaluation results have gradually transitioned from subjective to objective, optical property evaluation. Reliability has been greatly improved.
  • the general object optical characteristic measuring instrument on the market usually adopts a spectrometer as a light measuring device, and the spectral or self-photometric characteristics of the light after the sample is applied are measured by a spectrometer, and the tristimulus values of the object are calculated by using the spectral test data.
  • a spectrometer as a light measuring device
  • the spectral or self-photometric characteristics of the light after the sample is applied are measured by a spectrometer, and the tristimulus values of the object are calculated by using the spectral test data.
  • there are two main types of color measuring devices the first one, which uses two spectrometers, one of which acts as a light measuring device to receive light from the sample, and the other as a monitoring device. The light is reflected and the source changes are monitored to correct the measurement.
  • the light emitted by the sample and the light directly emitted by the light source can be measured through two optical paths, respectively, without interfering with each other.
  • the cost of using two spectrometers is excessive.
  • the instrument is bulky and affects the convenience of measurement.
  • Another common color measuring device uses only one spectrometer, which reduces the cost and reduces the size of the instrument.
  • the present invention aims to provide an optical property measuring device for an object, which can complete the optical characteristic measurement of the sample to be tested only by configuring one light measuring device, and monitor the light source by setting a light source electrical parameter monitoring device.
  • the electrical parameters are changed, and after the light source is stably illuminated, the appropriate time window is selected to turn on the light measuring device for signal acquisition and measurement, and the monitoring result of the light source electrical parameter monitoring device is used to correct the measurement result of the light measuring device.
  • the invention improves the accuracy of measurement while reducing the cost.
  • an optical property measuring device for an object comprising: a light source group, a light measuring device, and a light source electrical parameter monitoring device, wherein the light source group emits light of a specific spectrum and is irradiated to be On the sample, the light measuring device receives the light from the light source group and acts on the sample to be tested, and the light source electrical parameter monitoring device monitors The operating electrical parameters of the light source in the light source group.
  • the invention provides a light source electrical parameter monitoring device for monitoring the variation of electrical parameters during the working process of the light source.
  • the LED light source as an example, in actual measurement, due to thermal drift, voltage or current fluctuation, mechanical vibration or pressure difference, the LED light source characteristics will be attenuated with time, which affects the repeatability or consistency of the test results.
  • the junction temperature of the LED has a significant effect on the light output.
  • the invention can not only monitor the stability of the light source luminescence spectrum, but also use the data obtained by the monitoring to correct the spectral data measured by the measuring device, thereby improving the accuracy of the measurement.
  • the cost since only one light measuring device is provided, the cost can be greatly reduced.
  • the light source group includes at least one LED light source.
  • the existing object optical characteristic measuring device uses a flash lamp, that is, a pulse light source, as a test light source, and performs sampling measurement in one or more pulse time windows by setting a flash or a pulse number before the test, due to the flash measurement process.
  • the pulse width is small and the measurement time is short, so the measurement accuracy cannot be guaranteed very well.
  • the invention selects the LED light source as the test light source, and adopts the direct current drive for the LED light source. In the initial stage of the power supply, the output performance of the LED will change significantly. After a period of time, the output performance change will tend to be stable.
  • a suitable time window turns on the signal acquisition measurement work, which ensures that the measurement is performed in a long time window, which improves the accuracy of the test.
  • the light source group includes at least one LED white light source and one LED independent compensation light source, and the LED white light source and the LED independent light source are combined to emit light to form a desired light to be irradiated onto the sample to be tested.
  • the LED white light source has a full spectrum distribution in the 380-780 nm band, and has the characteristics of high luminous efficiency, rich spectrum, small volume, and easy control and driving. It should be pointed out that for a sample with obvious color selection characteristics, the spectral power distribution of a particular light source cannot match the color characteristics of the measured object, resulting in the measured optical characteristics not conforming to the actual perception of the human eye. That is, it cannot accurately reflect the characteristics of gloss, transmission, reflection, etc.
  • the light source is combined with the white light source to obtain a light source closer to the optical characteristics of the sample to be tested, thereby improving the test accuracy.
  • the spectral sensitivity of the purple region is increased by adding a violet light source while the white light source is irradiated, and the complementary violet light is compared with the sample to be measured under the white light source alone.
  • the light source can more significantly present the optical characteristics of the sample to be tested, thereby obtaining high-accuracy optical characteristic parameters.
  • the complementary light band of the independent complementary light source should cover a band with a lower spectral sensitivity in the independent white light source, so as to achieve the purpose of improving the spectral responsivity of the light to be supplemented.
  • said set of light sources comprises more than one independent narrow wave source, said one or more independent narrow wave sources emitting discrete narrowband spectra, and the combined band spectra of the set of light sources are corrected using narrow band spectra.
  • a combination of a white LED light source and a violet LED light source is selected as the light source group for illumination.
  • the violet light source is used as the illumination source.
  • the spectral response rate outside the remaining bands is zero.
  • Noise or stray light can be considered in these bands. Therefore, when the combination of the white light source and the violet light source is subsequently used as the incident light source, the error caused by the partial noise other than the violet light should be removed from the measured optical characteristic magnitude of the object, thereby further improving the measurement accuracy.
  • the light source group and the corresponding measuring device and the sample to be tested form a d/8 or 8/d or d/0 or 0/d or 45/0 or 0/45 object reflection color measurement geometric condition
  • the transmission color measurement geometry of objects such as d/0 or 0/d or 0/0 to meet the actual measurement needs at present international and domestic.
  • the method further includes a temperature control device disposed on the light source group, and the temperature control device controls the operating temperature of the LED light source according to the relationship between the junction voltage of the LED light source and the junction temperature. Due to the stability factor of the LED light source itself, changes in voltage or frequency, local humidity or other environmental conditions will have a significant impact on the output characteristics of the light source. Therefore, by setting the temperature control device, the junction voltage and junction temperature of the LED light source are utilized. Correlation relationship to achieve control of the operating temperature of the LED light source. It should be noted that the temperature control device can also be used to compensate and adjust the influence of the environmental state change on the junction temperature of the LED.
  • the light source electrical parameter monitoring device is electrically connected to the temperature control device, and the temperature control device controls the operating temperature of the light source by means of cooling or heating according to the light source electrical parameter information measured by the light source electrical parameter monitoring device.
  • the light source electrical parameter monitoring device is electrically connected with the temperature control device, and through the mutual feedback of the two, a stable light source output characteristic can be obtained.
  • the specific method is: a constant current is introduced into the light source group, and the light source electrical parameter monitoring device monitors the light source group.
  • the electrical parameter fluctuations, the light source electrical parameter monitoring device feeds back the measured electrical parameter information to the temperature control device, and the temperature control device adjusts the operating temperature of the light source in the light source group according to the measured result in a cooling or heating manner, and the light source electrical parameter monitoring device monitors again.
  • the electrical parameters of the light source in the light source group fluctuate.
  • the electrical parameter fluctuation of the light source in the light source group tends to be stable, that is, the operating temperature of the LED light source. It tends to be stable, and then the light measuring device is turned on to measure the optical characteristics of the sample to be tested.
  • the feedback adjustment method utilizes the relationship between the junction temperature of the LED and the junction voltage.
  • the data measured by the light measuring device is the optical characteristic measurement data of the object under the steady state of the LED light source. .
  • the optical measurement device can be corrected without using the data measured by the light source electrical parameter monitoring device.
  • the light measuring device turns on the signal acquisition measurement work after the light source of the light source group is lit and stabilized. Since the output performance of the LED is not stable during the initial stage of power-on, after a short period of time, the output performance will tend to be stable. At this time, select a suitable time window in the stationary phase and turn on the light measuring device for signal. Collect measurement work.
  • the invention has an essential difference from the traditional pulse light source measurement.
  • the pulse light source measurement is performed by setting the number of pulses before the test, and the measurement is completed in one or more pulse time windows. Since the pulse width during the measurement is small, the actual measurement time is It is short, so the measurement accuracy cannot be guaranteed very well.
  • the invention can ensure that the measurement is carried out in a long time window, and the test precision is further improved.
  • the light measuring device is a spectroradiometer or a spectroradiometric module, and can measure the spectral information of the sample to be tested, and obtain color information related to the spectral information according to the obtained spectral information, such as the spectrum of the sample to be tested. Reflectance, transmittance, color coordinates, and the like.
  • the light source electrical parameter monitoring device monitors electrical parameters of the light source in the light source group, and derives the actual light emission spectrum of the light source according to the dependence of the light source electrical parameter on the light source emission spectrum, and corrects the measurement of the light measuring device. result.
  • the monitoring parameters of the light source electrical parameter monitoring device also change: when the light source is an LED, the light source electrical parameter monitoring device monitors the current or voltage of the LED; when other types of light sources, such as tungsten lamps, are used The light source electrical parameter monitoring device monitors the electrical power.
  • the light source electrical parameter monitoring device monitors the electrical parameter fluctuation of the light source group, and the electrical parameter obtained by the monitoring can be converted into an optical parameter by using the dependence of the light source electrical parameter on the light source luminescence spectrum, thereby deriving the actual illuminating spectrum of the light source;
  • the device measures the spectrum of the light source after the sample is applied, and the latter is corrected by the former to obtain more accurate measurement results.
  • the light source electrical parameter monitoring device monitors the working electrical parameters of the LED light source in the light source group, according to the LED light source electrical parameter and the LED light source junction temperature and the LED light source.
  • the dependence of the spectrum the actual luminescence spectrum of the LED light source is estimated, and the measurement results of the light measuring device are corrected.
  • the junction temperature and the electrical parameters there is a close relationship between the junction temperature and the electrical parameters.
  • the present invention utilizes a combined LED light source as a light source for detection.
  • the electric parameter electric parameter monitoring device is configured to monitor the fluctuation of the electrical parameters of the detecting light source, and the light source is stabilized. After illuminating, select the appropriate time window to open the signal acquisition and measurement work, and use the monitoring result to correct the data measured by the light measuring device.
  • it can also cooperate with the temperature control device to realize the feedback adjustment mechanism of the temperature control device and the light source electrical parameter control device. Stable output to the LED light source to improve test accuracy. It can be widely applied to the measurement of optical properties of various objects, and has the characteristics of convenient operation, wide application range and high measurement accuracy.
  • Figure 1 is a temperature dependent characteristic curve of white high power LED luminous flux and CCT
  • FIG. 2 is a schematic view of Embodiment 1;
  • Figure 5 is a schematic view of Embodiment 3.
  • Figure 6 is a schematic view of Embodiment 4.
  • Figure 7 is a schematic view of Example 5.
  • 1-light source group 11-LED white light source; 12-LED supplement light source; 2-light measuring device; 3-light source electric parameter monitoring device; Sample to be tested; 5-temperature control device.
  • this embodiment discloses a working principle diagram of an optical property measuring device for an object, which includes a light source group 1, a light measuring device 2, and a light source electrical parameter monitoring device 3.
  • the light source group 1 includes an LED light source, and Constant current drive.
  • a constant current is introduced into the light source group 1, and the light source electrical parameter monitoring device 3 monitors the voltage fluctuation of the light source group 1.
  • the output performance of the LED increases significantly, after a short period of time, The output performance change will tend to be stable.
  • a suitable time window in the smooth phase is selected to turn on the light measuring device 3 to perform signal acquisition and measurement work.
  • the spectral data measured by the light measuring device 2 is corrected by using the data obtained by the monitoring.
  • this embodiment further includes a temperature control device 5.
  • an optical property measuring device for an object includes a light source group 1, a light measuring device 2, a light source electrical parameter monitoring device 3, an integrating sphere and a light trap, and the light source group 1 is composed of four independent light sources.
  • the composition is respectively three independent light sources 12 such as an LED white light source 11, a red LED, a green LED and a blue LED, and the light source group 1 is located in an incident direction with an angle of 8° from the normal of the sample 4 to be tested.
  • the light measuring device 2 is located on the horizontal exit opening of the integrating sphere, and the light source group 1 and the measuring device 2 and the sample 4 to be tested constitute a color measurement geometric condition of 8/d; the light measuring device 2 is a spectral radiometer.
  • the LED white light source 11 in the light source group 1 is turned on separately, or the LED white light source 11 and one or more independent LED supplement light sources 12 are simultaneously turned on, and irradiated onto the sample 4 to be tested, and the reflected light of the sample 4 to be tested is passed through the integrating sphere. After sufficient diffuse reflection, it is received and measured by the light measuring device 2, wherein the specularly reflected light of the sample 4 to be tested is absorbed by a light trap located symmetrically with the direction of the light source group 1 to eliminate the influence of specular reflection.
  • the embodiment further includes a light source electrical parameter monitoring device 3 for monitoring fluctuations in electrical parameters of the individual light sources in the light source group 1. After the measurement is completed, the spectral data measured by the measurement device can be corrected by using the data obtained by the monitoring.
  • the system structure of the embodiment is simple, Compact, test results repeatability and consistency, fast measurement, suitable for industrial production lines and on-site rapid and laboratory measurements.
  • the utility model comprises a light source group 1, a light measuring device 2, a light source electrical parameter monitoring device 3, an integrating sphere and a measured transmission sample 4.
  • the light source group 1 is located at an incident direction of 90° with the horizontal light exit opening of the integrating sphere, and the measured transmission is transmitted.
  • the sample 4 is located on the horizontal exit opening of the integrating sphere, and the light measuring device 2 is located on the optical path after the transmitted sample 4 is measured.
  • the light source electrical parameter monitoring device 3 is arranged to monitor the electrical parameter fluctuation of each independent light source in the light source group 1.
  • this embodiment realizes color measurement of 45/0, and the light source group 1 is composed of one LED white light source 11 and one purple LED supplement light source 12.
  • the light source group 1 is located. In the incident direction with an angle of 45° from the normal of the sample 4, the emitted light is reflected by the sample 4 to be measured and then received by the light measuring device 2 on the normal line of the sample 4 (ie, 0°). measuring.
  • the sample to be tested mainly selects the reflected violet light.
  • the spectral sensitivity of the violet region is increased by supplementing the violet light supplement source 12.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un appareil permettant de mesurer des propriétés optiques d'un objet. Un appareil de surveillance de paramètre électrique de source de lumière (3) est configuré de sorte à surveiller les fluctuations d'un paramètre électrique de source de lumière, au cours d'un test, lorsqu'une source de lumière luit de façon constante, une fenêtre temporelle appropriée est sélectionnée pour allumer un appareil de mesure optique (2) pour permettre des tâches de collecte et de mesure de signaux et un résultat de surveillance peut être utilisé pour corriger des données mesurées par l'appareil de mesure optique (2). En même temps, un appareil de réglage de température (5) peut également être utilisé en tandem. Une sortie stable de la source de lumière est mise en œuvre par le biais d'un mécanisme de rétroaction de l'appareil de réglage de température (5) et de l'appareil de surveillance de paramètre électrique de source de lumière (3). Ceci augmente la précision de mesure tout en réduisant les coûts et peut être appliqué à une mesure des propriétés optiques de divers objets.
PCT/CN2015/089377 2015-04-13 2015-09-10 Appareil permettant de mesurer des propriétés optiques d'un objet WO2016165269A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201510170696.7 2015-04-13
CN201510170696.7A CN104792710B (zh) 2015-04-13 2015-04-13 一种物体光学特性测量装置
CN201520216703.8 2015-04-13
CN201520216703.8U CN204924913U (zh) 2015-04-13 2015-04-13 一种物体光学特性测量装置

Publications (1)

Publication Number Publication Date
WO2016165269A1 true WO2016165269A1 (fr) 2016-10-20

Family

ID=57126948

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/089377 WO2016165269A1 (fr) 2015-04-13 2015-09-10 Appareil permettant de mesurer des propriétés optiques d'un objet

Country Status (1)

Country Link
WO (1) WO2016165269A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110108648A (zh) * 2019-04-30 2019-08-09 深圳市太赫兹科技创新研究院有限公司 一种陈皮的鉴别方法和鉴别***

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1111333A1 (fr) * 1999-06-29 2001-06-27 Omron Corporation Dispositif a source lumineuse, spectroscope comportant le dispositif a source lumineuse et capteur d'epaisseur de couche
CN1738507A (zh) * 2005-07-26 2006-02-22 潘建根 一种led光源结点温度的控制方法及制得的led校准光源
US20070195318A1 (en) * 2006-02-17 2007-08-23 Yokogawa Electric Corporation Wavelength calibration method and wavelength calibration apparatus
CN101587079A (zh) * 2009-05-08 2009-11-25 清华大学 纺织原料中异性杂质的多光谱色偏振检测方法及其装置
JP2012149938A (ja) * 2011-01-18 2012-08-09 Konica Minolta Advanced Layers Inc 分光測定装置
CN202854290U (zh) * 2012-10-23 2013-04-03 杭州远方光电信息股份有限公司 一种热电性能测量装置
CN104792710A (zh) * 2015-04-13 2015-07-22 杭州远方光电信息股份有限公司 一种物体光学特性测量装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1111333A1 (fr) * 1999-06-29 2001-06-27 Omron Corporation Dispositif a source lumineuse, spectroscope comportant le dispositif a source lumineuse et capteur d'epaisseur de couche
CN1738507A (zh) * 2005-07-26 2006-02-22 潘建根 一种led光源结点温度的控制方法及制得的led校准光源
US20070195318A1 (en) * 2006-02-17 2007-08-23 Yokogawa Electric Corporation Wavelength calibration method and wavelength calibration apparatus
CN101587079A (zh) * 2009-05-08 2009-11-25 清华大学 纺织原料中异性杂质的多光谱色偏振检测方法及其装置
JP2012149938A (ja) * 2011-01-18 2012-08-09 Konica Minolta Advanced Layers Inc 分光測定装置
CN202854290U (zh) * 2012-10-23 2013-04-03 杭州远方光电信息股份有限公司 一种热电性能测量装置
CN104792710A (zh) * 2015-04-13 2015-07-22 杭州远方光电信息股份有限公司 一种物体光学特性测量装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110108648A (zh) * 2019-04-30 2019-08-09 深圳市太赫兹科技创新研究院有限公司 一种陈皮的鉴别方法和鉴别***
CN110108648B (zh) * 2019-04-30 2022-01-14 深圳市太赫兹科技创新研究院有限公司 一种陈皮的鉴别方法和鉴别***

Similar Documents

Publication Publication Date Title
EP3376187B1 (fr) Procédé d'essai colorimétrique à l'aide d'une cabine d'appariement des couleurs à illuminant normalisé
CN103267588B (zh) 基于led相对光谱随温度变化的结温测试方法
US9243953B1 (en) Spectrophotometric colorimeter based on LED light source and method for realizing the same
US8723426B2 (en) Systems and methods for sampling light produced from an LED array
CN104792710B (zh) 一种物体光学特性测量装置
CN103344613B (zh) 一种材料反射特性测量装置及方法
CN103411702B (zh) 利用峰值波长移位法非接触测量白光led结温的装置
CN102707212A (zh) Led寿命实时检测装置
CN101799357A (zh) 光源试验方法及其装置
CN105938016A (zh) 一种颜色测量装置
CN101718586B (zh) 棉花色泽仪标准色板的标定方法和***
CN104122213A (zh) 一种测量水质色度的方法
CN103900695B (zh) 一种基于法布里-珀罗干涉器的光谱测色仪
CN101191770B (zh) 发光二极管荧光粉发射光谱测量方法
WO2016165269A1 (fr) Appareil permettant de mesurer des propriétés optiques d'un objet
CN204924913U (zh) 一种物体光学特性测量装置
CN202710183U (zh) 一种物体色度测量***
CN203376143U (zh) Led灯温度特性检测装置
CN202255846U (zh) Led寿命实时检测装置
CN201600237U (zh) 一种光源试验装置
CN204924914U (zh) 一种光谱反馈调光比色灯箱
CN201069388Y (zh) 一种光谱仪
CN109029933A (zh) 一种表征荧光粉转换型led光效的装置及方法
KR101841931B1 (ko) 태양전지의 양자효율측정장치와 그 제어방법
CN115291071A (zh) 基于锁相放大器的led阵列光热一体检测装置及方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15888969

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15888969

Country of ref document: EP

Kind code of ref document: A1