CN114965395A - Long afterglow material fluorescence spectrum test tool and method - Google Patents

Abstract

The invention discloses a long afterglow material fluorescence spectrum testing tool and a long afterglow material fluorescence spectrum testing method, and relates to the technical field of fluorescence spectrum testing. The tool comprises a laser light source, a fluorescence spectrometer and a material installation structure to be detected; the mounting structure of the material to be tested comprises a rotating tray, an opaque fixed tray cover and a motion controller; the rotating material tray is filled with a material to be detected and is rotationally connected with the opaque fixed material tray cover; the side of the rotating tray, which faces at least the opaque fixed tray cover, is transparent; the opaque fixed tray cover is provided with a slit, and laser can irradiate on the material to be detected through the slit. According to the invention, with the change of the excitation wavelength, the rotating tray continuously rotates relative to the opaque fixed tray cover, the material to be detected sequentially and continuously passes through the slit to be irradiated to generate fluorescence, and the material to be detected which is irradiated to generate the long afterglow effect is shielded so as to avoid influencing the subsequent test, thereby avoiding the influence of the long afterglow effect on the fluorescence spectrum test and ensuring that the test result is more accurate.

Description

A kind of long afterglow material fluorescence spectrum testing tool and method

technical field

The invention relates to the technical field of fluorescence spectrum testing, in particular to a long afterglow material fluorescence spectrum testing tool and method.

Background technique

Long afterglow luminescent material is a kind of luminescent material. Compared with conventional luminescent materials, it is characterized in that it can be excited to emit light under the irradiation of a laser light source of a specific wavelength, and can store the excitation energy at the same time. Still glowing afterward. This feature makes long afterglow luminescent materials used in emergency safety instructions, anti-counterfeiting signs, information storage, medical inspection, landscape lighting and other fields.

As a luminescent material, the test of excitation spectrum and emission spectrum is a very important characterization method in its research process. This test can not only determine the best excitation light source and luminescent color of luminescent material, but also has a great influence on the research of its luminescent process. important meaning. Therefore, its accurate testing is critical.

The test method of excitation spectrum is usually to gradually change the wavelength of the excitation light under the monitoring of the fluorescence detector, and record the fluorescence intensity under different excitation wavelengths to form a spectrum; the test method of emission spectrum is to place the luminescent material under a certain laser light source. , the fluorescence emission spectrum is obtained by scanning the spectral components of the fluorescence through a monochromator and a detector. At present, fluorescence spectrum test is a relatively mature technology, but there are some problems in the test of long afterglow materials, because the long afterglow effect will affect the test results. Taking excitation spectrum test as an example, when the wavelength of the excitation light source varies from When scanning from one direction to the other, the long afterglow effect (luminescence delay) caused by the previous excitation wavelength point will be superimposed on the fluorescence effect caused by the latter excitation wavelength point, resulting in a change in the peak position of the excitation spectrum and a broadening of the excitation spectrum. Moreover, since the wavelengths of long afterglow emission and fluorescence emission are usually the same, it is difficult to separate the two through conventional filters and other means.

The influence of the long afterglow effect on the excitation spectrum test is also reflected in the poor test consistency. In practice, the material is generally protected from light or heat treated before the test to minimize the influence of the long afterglow effect, but in general it cannot be completely avoid this effect. Chinese invention patent CN108007906B discloses a long afterglow material phosphorescence excitation spectrum measurement system and method, also noticed the difference between fluorescence and phosphorescence (long afterglow luminescence) of long afterglow luminescent materials, and tried to distinguish the fluorescence excitation spectrum and the phosphorescence excitation spectrum, but It only filters the phosphorescence spectrum by delaying the emission collection time under a certain excitation wavelength, and does not avoid the influence of the phosphorescence generated at the previous excitation point on the latter excitation point.

At present, the long afterglow effect of long afterglow luminescent materials has an adverse effect on the fluorescence spectrum, especially the excitation spectrum test, and has adverse effects on the luminescence process and energy level structure of the studied materials. The inability to accurately measure the peak position of the excitation spectrum also brings inconvenience to the application of long afterglow materials, making it impossible to effectively determine the most efficient excitation wavelength. Therefore, it is necessary to design a method that can accurately measure the fluorescence spectra of long-persistence materials.

SUMMARY OF THE INVENTION

In view of this, the present invention discloses a long afterglow material fluorescence spectrum test tool and method, which can effectively avoid the influence of the long afterglow effect on the fluorescence spectrum test, so that the test results are accurate and reliable.

According to the purpose of the present invention, a long afterglow material fluorescence spectrum testing tool is proposed, which includes a laser light source, a fluorescence spectrometer, and an installation structure for the material to be measured; the installation structure for the material to be measured includes a rotating tray, an opaque fixed tray cover, and an opaque fluorescent A slit cover and a motion controller; the rotating material tray is filled with the material to be tested, installed on one side of the opaque fixed tray cover, and can be rotated relative to the opaque fixed tray cover under the control of the motion controller; the rotation At least the side facing the opaque fixed tray cover is transparent; the opaque fixed tray cover is provided with a slit, and the laser can be irradiated on the material to be tested in the rotating tray through the slit; the opaque fixed tray cover The fluorescent slit cover is installed on the opaque fixed tray cover to cover the slit and can be opened or closed under the control of the motion controller.

Preferably, a transparent tray cover is detachably and fixedly installed on the side of the rotating tray facing the opaque fixed tray cover.

Preferably, the rotating tray, the transparent tray cover and the opaque fixed tray cover are all annular shapes and sizes adapted to each other, and the slits are radially arranged on the opaque fixed tray cover.

Preferably, a rotating motor is fixedly installed on the central shaft of the opaque fixed tray cover, and a connecting head that cooperates with the rotating motor is fixedly installed in the center of the rotating tray through a connecting rod, and the rotating tray is driven by the rotating motor. The lower part rotates relative to the opaque fixed tray cover; the opaque fixed tray cover is fixedly mounted on the motion controller casing.

Preferably, the outer surface of the opaque fluorescent slit cover is coated with fluorescent material.

The present invention also discloses a method for testing the fluorescence spectrum of long afterglow materials based on the above-mentioned test tool, comprising the following steps:

Step 1: Fill the material to be tested, install the rotating tray with the transparent tray cover on the opaque fixed tray cover, and close the opaque fluorescent slit cover to cover the slit on the opaque fixed tray cover.

Step 2: Install the assembled installation structure of the material to be tested in the fluorescence spectrometer as a whole.

Step 3: Adjust the optical path so that the excitation light can irradiate the opaque fluorescent slit cover, and adjust the instrument parameters with the fluorescent material on the outer surface of the opaque fluorescent slit cover as a reference, so that the fluorescence spectrometer is in the manual scanning mode.

Step 4: According to the scanning speed of the fluorescence spectrum, set the rotation speed of the rotating material tray, so that the rotation period of the rotating material tray is smaller than the scanning period of the fluorescence spectrometer, and take the maximum value.

Step 5: After the setting is completed, open the opaque fluorescent slit cover, and start the fluorescence spectrum scanning at the same time, and save the data after scanning.

Compared with the prior art, the advantages of a long afterglow material fluorescence spectrum testing tool and method disclosed in the present invention are:

(1) In the present invention, the rotating feed tray and the opaque fixed feed tray cover with slits are arranged in coordination. With the change of the excitation wavelength, the rotating feed tray continues to rotate relative to the opaque fixed feed tray cover, and the material to be tested successively passes through the slits. The material to be tested that is irradiated to produce fluorescence and has been irradiated to produce a long afterglow effect will be covered to avoid affecting subsequent tests, thereby effectively avoiding the long afterglow effect on the fluorescence spectrum test. The test method is scientific and effective. The test results are more accurate, which is conducive to promoting the progress of scientific research on long afterglow materials.

(2) The tooling disclosed in the present invention itself is a sealed light-proof structure, and the whole testing process does not need to be carried out in a dark environment, and the operation difficulty is reduced.

(3) The tooling disclosed in the present invention has low cost, simple use method, is conducive to standardized production, and also has a driving effect on the production of long afterglow luminescent materials.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention or the prior art more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Figure 1 is a disassembled diagram of the installation structure of the material to be tested.

FIG. 2 is an overall structural diagram of the installation structure of the material to be tested.

In the figure: 1- Rotating tray; 2- Transparent tray cover; 3- Slit; 4- Opaque fixed tray cover; 5- Opaque fluorescent slit cover; 6- Rotating motor; 7- Motion controller; 8- Connector; 9-Link.

Detailed ways

The specific embodiments of the present invention will be briefly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, those of ordinary skill in the art can obtain all other implementations without creative work. For example, all belong to the protection scope of the present invention.

Fig. 1-Fig. 2 show a preferred embodiment of the present invention, which is analyzed in detail.

The invention discloses a long afterglow material fluorescence spectrum testing tool, which includes a laser light source, a fluorescence spectrometer and an installation structure for a material to be tested. The installation structure of the material to be tested as shown in FIGS. 1 and 2 includes a rotating tray 1 , a transparent tray cover 2 , an opaque fixed tray cover 4 , an opaque fluorescent slit cover 5 and a motion controller 7 .

The rotating tray 1 , the transparent tray cover 2 and the opaque fixed tray cover 4 are all annular shapes and sizes adapted to each other. The rotating material tray 1 is filled with the material to be tested, and the transparent material tray cover 2 is made of acrylic material, and is fixed on the rotating material tray 1 with screws to rotate together. A rotating motor 6 is fixedly installed on the central axis of the opaque fixed tray cover 4 , the center of the rotating tray 1 is fixedly installed with a connecting head 8 which cooperates with the rotating motor 6 through three connecting rods 9 , and the rotating tray 1 is connected to the rotating tray 1 through the connecting head 8 . The connection of the rotating motor 6 realizes the rotating connection with the opaque fixed tray cover 4, the side where the transparent tray cover 2 is installed is set towards the opaque fixed tray cover 4, and the rotating tray 1 can be driven by the rotating motor 6 relative to the opaque tray. The fixed tray cover 4 is rotated, so that the materials to be tested at different positions in the rotating tray 1 are sequentially exposed under the slits 3 of the opaque fixed tray cover 4 .

The opaque fixed material tray cover 4 is fixedly installed on the casing of the motion controller 7, made of aluminum material, the surface is oxidized and blackened, and a slit 3 is arranged along its radial direction. The width of the slit 3 is 2mm, and the laser can penetrate The material to be tested is irradiated through the slit 3. The opaque fluorescent slit cover 5 is installed on the slit 3 to block the slit 3, so that the excitation light source cannot irradiate the tested material through the slit 3 of the opaque fixed tray cover 4 when the test is not performed. The opaque fluorescent slit cover 5 can be automatically opened or closed relative to the opaque fixed tray cover 4 under the control of the motion controller 7 . The outer surface of the opaque fluorescent slit cover 5 is coated with a YAG:Ce fluorescent ceramic material, and when the excitation light irradiates the YAG:Ce fluorescent ceramic material on its outer surface, fluorescence is generated, which can be used for equipment debugging.

The present invention also discloses a method for testing the fluorescence spectrum of long afterglow materials based on the above-mentioned test tool, comprising the following steps:

Step 1: Fill the material to be tested, install the transparent tray cover 2, install the rotating tray 1 with the transparent tray cover 2 on the opaque fixed tray cover 4, close the opaque fluorescent slit cover 5 to cover the opaque fixed Slot 3 in tray cover 4.

Step 2: Install the assembled installation structure of the material to be tested in the fluorescence spectrometer as a whole.

Step 3: Adjust the optical path so that the excitation light can irradiate the opaque fluorescent slit cover 5, and adjust the instrument parameters with the fluorescent material on the outer surface of the opaque fluorescent slit cover 5 as a reference, so that the fluorescence spectrometer is in the manual scanning mode.

Step 4: According to the scanning speed of the fluorescence spectrum, set the rotation speed of the rotating tray 1 so that the rotation period of the rotating tray 1 is smaller than the scanning period of the fluorescence spectrometer, and take the maximum value.

Step 5: After the setting is completed, open the opaque fluorescent slit cover 5 by remote control, and start the fluorescence spectrum scanning at the same time. With the change of the excitation wavelength, the rotating material disc 1 continues to rotate, so that the material to be tested continuously passes through the slit 3 and is irradiated to generate fluorescence. Later tests have an impact. After scanning, save the data and the test is complete.

The foregoing description of the disclosed embodiments enables those skilled in the art to make and use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit and scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A long afterglow material fluorescence spectrum testing tooling is characterized in that, comprises laser light source, fluorescence spectrometer and material to be measured installation structure; Described material to be measured installation structure comprises rotating material tray (1), opaque fixed material tray cover ( 4), an opaque fluorescent slit cover (5) and a motion controller (7); the rotating material tray (1) is filled with the material to be tested, and is installed on one side of the opaque fixed material tray cover (4), which can move Under the control of the controller (7), it rotates relative to the opaque fixed tray cover (4); the rotating tray (1) is transparent at least on the side facing the opaque fixed tray cover (4); the opaque fixed material The disc cover (4) is provided with a slit (3), through which the laser can be irradiated on the material to be tested in the rotating material disc (1); the opaque fluorescent slit cover (5) is mounted on the The opaque material tray cover (4) is fixed to cover the slit (3), and can be opened or closed under the control of the motion controller (7). 2. A kind of long afterglow material fluorescence spectrum testing tool according to claim 1, is characterized in that, described rotating material plate (1) is detachably fixed and installed with transparent material toward one side of opaque fixed material plate cover (4). Pan cover (2). 3. A kind of long afterglow material fluorescence spectrum test tool according to claim 2, is characterized in that, described rotating material tray (1), transparent material tray cover (2) and opaque fixed material tray cover (4) are The shape and size of the ring are adapted, and the slit (3) is radially arranged on the opaque fixed tray cover (4). 4. A long afterglow material fluorescence spectrum testing tool according to claim 3, characterized in that, a rotating motor (6) is fixedly installed on the central axis of the opaque fixed tray cover (4), and the rotating tray (1) A connecting head (8) is fixedly installed in the center through the connecting rod (9) in cooperation with the rotating motor (6). The rotating material tray (1) is driven by the rotating motor (6) relative to the opaque fixed material The disk cover (4) rotates; the opaque fixed material disk cover (4) is fixedly mounted on the casing of the motion controller (7). 5 . The long afterglow material fluorescence spectrum testing tool according to claim 1 , wherein the outer surface of the opaque fluorescent slit cover ( 5 ) is coated with fluorescent material. 6 . 6. a method for carrying out long afterglow material fluorescence spectrum test based on a kind of long afterglow material fluorescence spectrum test tool described in any one of claim 1-5, is characterized in that, comprises the following steps: Step 1: Fill the material to be tested, install the rotating tray (1) with the transparent tray cover (2) on the opaque fixed tray cover (4), close the opaque fluorescent slit cover (5) to cover the opaque fixed tray Slot (3) on the tray cover (4); Step 2: Install the assembled installation structure of the material to be tested in the fluorescence spectrometer as a whole; Step 3: adjusting the optical path so that the excitation light can irradiate the opaque fluorescent slit cover (5), and adjusting the instrument parameters with the fluorescent material on the outer surface of the opaque fluorescent slit cover (5) as a reference, so that the fluorescence spectrometer is in a manual scanning mode; Step 4: according to the fluorescence spectrum scanning speed, set the rotation speed of the rotating material tray (1), so that the rotation period of the rotating material tray (1) is less than the scanning period of the fluorescence spectrometer, and take the maximum value; Step 5: After the setting is completed, open the opaque fluorescent slit cover (5), start fluorescent spectrum scanning at the same time, and save the data after scanning.

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