Fluorescent powder spectrum tester

Abstract

The invention discloses a fluorescent powder spectrum tester comprising a computer, a spectrometer and an integrating sphere (9). The fluorescent powder spectrum tester is characterized in that an LED light source (1) is arranged at the upper end of the integrating sphere (9), a TEC temperature controller is arranged at the upper end of the LED light source (1), a constant-current power line is connected with the LED light source (1) through a conductor wire (2) directly, the LED light source (1) is connected with the integrating sphere (9) through a light emitting barrel (3), a fixing device (5) is arranged at the lower end of the integrating sphere (9), fluorescent powder (7) is mounted in the fixing device (5), and a cosine collector (4) is arranged on the left side of the left wall of the integrating wall (9), and is connected with the spectrometer and the computer sequentially through an optical fiber (8). According to the full-close characteristic of the integrating sphere, wastes of light energy and influences of non-uniformity of light to test results are avoided, and light acquisition capacity of the spectrometer can be improved greatly.

Description

technical field [0001] The invention relates to the technical field of LEDs, in particular to a fluorescent powder spectrum tester. Background technique [0002] In recent years, the rapid change of climate has become a serious problem facing the whole society. Therefore, various fields in the world have proposed the advantages of environmental protection and energy saving, as well as the advantages of energy saving and environmental protection such as no mercury, so it is expected to replace traditional incandescent lamps and fluorescent lamps as a new generation of energy-saving lighting sources. . At present, there are various phosphor testing devices and systems, but the testing methods are not perfect. Many research groups have used different methods to test the luminous properties of phosphors. Most of the test methods for phosphors do not take into account the effect of the junction temperature rise of LED light sources on the excitation efficiency of phosphors. As ...

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Problems solved by technology

At present, there are many kinds of phosphor testing devices and systems, but the testing methods are not perfect

Many research groups have used different methods to test the luminous properties of phosphors. Most of the phosphor test methods do not take into account the effect of the junction temperature rise of the LED light source on the excitation efficiency of phosphors.

As the driving current increases, the temperature of the device rises, which will easily cause the peak wavelength of the excited blue light spectrum to shift to the short wavelength direction, which will cause a mismatch between the peak wavelength of blue light and the main peak of the excitation wavelength of the phosphor, reducing the conversion of blue light to yellow. light efficiency, resulting in inaccurate measurements

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