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A spectral measurement and optical fiber technology, applied in the field of temperature-variable spectral measurement devices, can solve the problems of in-depth research and accurate screening of unfavorable materials, and the inability to measure fluorescence quantum yields, and achieve the effect of close combination or separation
Active Publication Date: 2016-03-16
XIAMEN INST OF RARE EARTH MATERIALS
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Existing fluorescence spectrometers can only measure the quantum yield at room temperature, but cannot measure the fluorescence quantum yield of materials at different temperatures, which is not conducive to in-depth research and accurate screening of materials
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Embodiment 1
[0022] Such as figure 1 The variable temperature spectrum measurement device shown includes an integrating sphere 1 , a temperature-controlled sample stage 2 , a light source 6 , fiber optic heads 5 - 1 and 5 - 2 , a baffle 3 , a fiber optic spectrometer 7 and a temperature controller 4 .
[0023] Wherein the optical fiber head 5-1 is arranged at the entrance of the integrating sphere for the incident of excitation light.
[0024] The optical fiber head 5-2 is arranged at the exit port of the integrating sphere, and is used to collect the exiting light and guide it to the detector.
[0025] The light source 6 is an LED with a wavelength of 450 nm.
[0026] The lower part of the integrating sphere 1 is open, and the size of the opening matches the size of the temperature-controlled sample stage, so that when the temperature-controlled sample stage is located at the opening, it forms an integral body with the integrating sphere.
[0027] The temperature-controlled sample stage...
Embodiment 2
[0036] Such as image 3 The variable temperature spectrum measurement device shown includes an integrating sphere 1, a temperature-controlled sample stage 2, a light source 9, monochromators 10-1 and 10-2, lenses 8-1 and 8-2, a mirror 12, and a photomultiplier tube 11 , Baffle 3, temperature controller 4, etc.
[0037] The lens 8-1 is arranged at the entrance of the integrating sphere, and the lens 8-2 is arranged at the exit of the integrating sphere.
[0038] The light source 9 is a xenon lamp.
[0039] Monochromator 10 - 1 is disposed between light source 9 and mirror 12 .
[0040] The monochromator 10-2 is provided between the lens 8-2 and the photomultiplier tube 11.
[0041] Integrating sphere 1, temperature control sample stage 2, baffle plate 3 and temperature controller 4 are the same as in embodiment 1.
[0042] When no sample is placed on the temperature control sample stage 2, the light emitted by the light source 9 passes through the monochromator 10-1 to obta...
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Abstract
The invention relates to a temperature variable spectral measurement device, which comprises an excitation light source, an integrating sphere, a temperature control sample stage, a temperature controller and a detector. Specifically, the temperature controller is used for controlling the temperature of the temperature control sample stage, the excitation light source and the integrating sphere and the integrating sphere and the detector are all connected through optical fiber. The excitation light sent by the excitation light source is introduced into an integrating sphere entrance port of the integrating sphere through optical fiber and is incident to the temperature control sample stage, the light sent by a sample placed on the temperature control sample stage or the light reflected by the temperature control sample stage when no sample is placed thereon is collected by optical fiber through an integrating sphere exit port and is then introduced into the detector, by comparing the difference of emission spectra detected by the detector when a sample is placed and no sample is placed, the luminescence quantum yield can be calculated, thereby realizing measurement of sample luminescence. By combining the excitation light source and the detector, the temperature variable spectral measurement device provided by the invention can realize measurement of the temperature variable emission spectrum, quantum yield and other optical properties of a luminescent material.
Description
technical field [0001] The invention relates to an optical radiation measurement system, in particular to a variable temperature spectrum measurement device. Background technique [0002] Fluorescence spectrometer, also known as fluorescence spectrophotometer, is an instrument for qualitative and quantitative analysis. Through the detection of fluorescence spectrometer, the excitation spectrum, emission spectrum, quantum yield, fluorescence intensity, fluorescence lifetime, and Stokes shift of the substance can be obtained. , fluorescence polarization and depolarization characteristics, and fluorescence quenching information, so it is widely used in research and production fields such as luminescent materials, lighting and display. The fluorescence test system generally consists of an excitation light source, a monochromator, an integrating sphere, a detector, and a computer. Generally, when an integrating sphere is used, it is possible to measure the room-temperature lumin...
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