The application of fiber optic spectrometer in led measurement

by:FOT     2020-07-04
The advantages of fiber optic equipment spectrometer is system of modularization and flexibility. The science of miniature fiber optic spectrometer measurement speed is very fast, it can be used for on-line analysis. Universal detector and choose due to its low cost, so the cost of the spectrometer is greatly reduced, thus greatly extend its application field. In powerful standard software that we can easily monitor the L, a, b, and parameters such as dL, dE change over time, even we can custom some parameters, and observe their changes over time. At the same time, USB2 platform spectrometer also comes with analog and digital output, the value of the analog and digital output can correspond to the definition of function, convenient in the application of the on-line measuring control. 1. 2 LED measurement experiment. 1 LED measurement LED measurement generally adopts two methods: photometric and radiometric measurements. Photometric confined to the visible light band, associated with the response of the human eye. While radiation measurement has nothing to do with the human eye response. Both methods can describe the radiation power and luminous intensity of LED. Radiation power is LED in all directions all fired power ( Radiation flux) Combined, the unit is lumen ( * the lumen is the unit of optical power *) Or tile. And luminous intensity is pointing in the direction the observer per unit solid Angle on exposure to the objects in the luminous flux, usually considered to be along the axis direction of the LED, unit is the candela. The measure of our fiber optic spectrometer can be used to monitor the LED irradiance, radiometric quantity, amount of photometry ( Lux or Lumen) , color coordinates X, Y, Z, X, Y, Z, u, v and color temperature and so on more than ten parameters. 2. 2 LED measurement system for the LED light-emitting surface unique appearance size, cause its luminescence uniformity, very hard so there is no uniform so far? The standard to define how to measure the LED. So careful design and use the LED test equipment is very important to obtain effective measurement results. Measuring the LED total luminous flux zui zui simple and convenient method is to use integrating sphere and the flag company spectrometer. Integrating sphere is zui commonly used devices, optical radiation measurement. The inner surface of the integral ball is almost diffuser, very uniform space reflective? 。 Radiation light, after multiple reflection became very evenly on the surface, for any bit of optical radiation QiuBi degrees are the same. The system can use the radiation calibration sources for calibration. Develop with our company's standard spectrum analysis software can be obtained from the spectral distribution to calculate the related parameters, and radiation measurement can be performed. At the same time can also calculate, display and storage by the strength of the metering. In the use of powerful standard LED measurements of spectral analysis software in the process, we can see the real-time measurement of various parameters, and you can also set you need to make time in the history of channel function monitoring values. 1. System is set up. Open the standard spectrum analysis software. Light source for calibration of optical fiber spectrometer with radiation calibration. Install the leds in the integrating sphere. Light LED, click the start button, select the appropriate integration time and the average number, and then close the LED save a dark background. The selected deduct a dark background, set the option and right of the spline and the smoothing parameter. Light LED, click on the flag radiation spectrum analysis software options start measurement Settings, set up and then click the OK button to start measuring. If you need to one or several parameters monitoring the change over time, can also be set before the measurement. 2. Spectrometer in the LED industry, the application of fiber optic equipment spectrometer in the industrial production of LED has more mature application, has now been applied fields have LED light, and the quality of the automobile instrument lighting LE D detection and so on. The typical applications in the LED industry has the following categories: on-line performance testing LED products LED chip selection, classification of LED manufacturers outgoing inspection LED to use business incoming goods inspection
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