CN110579458A - A testing device for fluorescence spectrum and a testing method for fluorescence spectrum - Google Patents

Abstract

The invention belongs to the technical testing field of fluorescence spectrum, and in particular relates to a fluorescence spectrum testing device and a fluorescence spectrum testing method. A fluorescence spectrum test device is used to obtain the fluorescence spectrum of the material to be tested, characterized in that the fluorescence spectrum test device includes: an excitation structure, including an excitation light source and an angle adjustment mechanism, the excitation light source is used to generate an excitation beam of a preset wavelength, The excitation beam is incident on the surface of the material to be tested at a preset incident angle, and the angle adjustment mechanism is used to adjust the value of the incident angle; the rotating structure is used to fix the material to be tested, and synchronize the material to be tested and the excitation light source according to the control instructions input by the user rotation; and a detection structure, which is used to receive the laser beam generated by the material to be tested, and obtain the corresponding fluorescence spectrum according to the laser beam. The invention finally obtains the angle distribution characteristic of the material to be tested by analyzing the fluorescence spectra measured under different rotation angles.

Description

A testing device for fluorescence spectrum and a testing method for fluorescence spectrum

technical field

The invention belongs to the technical testing field of fluorescence spectrum, and in particular relates to a fluorescence spectrum testing device and a fluorescence spectrum testing method.

Background technique

At present, organic light-emitting diodes (OLEDs), also known as organic electro-laser displays and organic light-emitting semiconductors, have many excellent characteristics such as light and thin structure, low power consumption, high efficiency, and simple manufacturing process, especially the doped small molecule OLED materials are used in light There are great potential applications in the field of luminescence. Improvements in OLED thin film materials can be achieved by studying molecular materials with transporting dipole moments in horizontal orientation.

However, it is more complicated to extract molecular orientation information directly. Common methods include sideband radiation measurement, surface plasmon coupling measurement, and dipole moment orientation measurement of dyed molecules in a microcavity structure. Although the working principle of these methods is correct, the extraction of molecular dipole moment-related information is relatively complicated, and the traditional OLED material luminescence angle distribution measurement device can only realize that the excitation light source is incident on the material to be measured at a single incident angle, that is, the excitation light source is incident on the material to be measured. The angle of incidence is a fixed setting.

Contents of the invention

The object of the present invention is to provide a fluorescence spectrum testing device, aiming at solving the problem of how to make the excitation light source incident on the material to be tested at different incident angles, so as to obtain the fluorescence spectrum of the material to be tested at different rotation angles.

The invention provides a fluorescent spectrum testing device, which is used to obtain the fluorescent spectrum of a material to be tested, and the fluorescent spectrum testing device includes:

The excitation structure includes an excitation light source and an angle adjustment mechanism, the excitation light source is used to generate an excitation beam with a preset wavelength, and the excitation beam is incident on the surface of the material to be measured at a preset incident angle, and the angle adjustment mechanism is used to adjusting the value of the incident angle;

a rotating structure for fixing the material to be tested, and synchronously rotating the material to be tested and the excitation light source according to a control command input by the user; and

a detection structure, configured to receive the light beam generated by the material to be tested, and obtain a corresponding fluorescence spectrum according to the light beam;

Wherein, the detection structure receives the detected laser beam from different positions of the material to be tested during the synchronous rotation of the material to be tested and the excitation light source.

The technical effect of the present invention is: the incident angle is adjusted by the angle adjustment mechanism, and the material to be tested and the excitation light source are rotated at the same time under the incident angle, and the fluorescence spectrum of the laser beam produced by the material to be tested at different rotation angles is measured. Under the preset incident angle, by analyzing the fluorescence spectra measured under different rotation angles of the material to be tested, the angle distribution characteristic of the material to be tested is finally obtained, and the structure is simple.

Description of drawings

Fig. 1 is the structural principle diagram of the testing device of the fluorescence spectrum provided by the embodiment of the present invention;

Fig. 2 is the three-dimensional structural diagram of the testing device of the fluorescence spectrum of Fig. 1;

Fig. 3 is a structural schematic diagram of the filter wheel of Fig. 2;

Fig. 4 is the fluorescence spectrum generated by the material to be tested under the irradiation of the rotation angle of 0-90 degrees provided by another embodiment of the present invention;

Fig. 5 is a schematic diagram of a test method for fluorescence spectrum provided by an embodiment of the present invention.

The relationship between the labels and names in the accompanying drawings is as follows:

100. Fluorescence spectrum testing device; 10. Excitation structure; 11. Excitation light source; 111. Monochromator; 112. Lens group; 12. Angle adjustment mechanism; 121. Adjustment motor; 122. Adjustment rod; 20. Rotation structure; 21. Rotating motor; 22. Cylindrical mirror; 23. Rotating rod; 30. Material to be tested; 40. Detection structure; 41. Optical collection unit; 411. Polarizing prism; 412. Filter mechanism; 4121. Filter wheel; 4122, filter motor; 413, optical collector; 60, optical fiber; 42, optical detection unit; 63, filter hole;

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "thickness", "upper", "lower", "perpendicular", "parallel", "bottom", "angle" etc. are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a reference to this invention. Invention Limitations.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical A connection can also be an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements.

Please refer to Fig. 1 to Fig. 3, the embodiment of the present invention provides a kind of fluorescence spectrum test device 100, is used for obtaining the fluorescence spectrum of the material 30 to be tested, specifically, the fluorescence spectrum test device 100 provided by the present invention can obtain in Fluorescence spectra of the material 30 to be tested under different incident angles. The testing device 100 for fluorescence spectrum includes: an excitation structure 10 , a rotation structure 20 and a detection structure. The excitation structure 10 includes an excitation light source 11 and an angle adjustment mechanism 12. The excitation light source 11 is used to generate excitation beams of preset wavelengths, that is, the excitation light source 11 can generate excitation beams of different wavelengths to excite different materials 30 to be tested. The excitation beam is incident on the surface of the material 30 to be measured at a preset incident angle, and the angle adjustment mechanism 12 is used to adjust the value of the incident angle. The rotating structure 20 is used to fix the material 30 to be tested, and after the angle adjustment mechanism 12 adjusts the incident angle in place, the rotating structure 20 rotates the material 30 to be tested and the excitation light source 11 synchronously according to the control command input by the user. The detection structure is used to receive the detected laser beams of the material 30 under the incident angle at different rotation angles, and obtain the corresponding fluorescence spectrum according to the detected laser beams. That is, the detection structure receives the detected laser beams from different rotational angle positions of the material to be measured 30 during the synchronous rotation of the material to be measured 30 and the excitation light source 11 .

The incident angle is adjusted by the angle adjustment mechanism 12 , and the material 30 to be tested and the excitation light source 11 are simultaneously rotated under the incident angle, and the fluorescence spectrum of the measured laser beam generated by the material 30 to be tested at different rotation angles is measured. By analyzing the fluorescence spectra measured under different rotation angles, the angular distribution characteristics of the material 30 to be tested are finally obtained, and the structure is simple.

In one embodiment, the control instruction input by the user may include a clockwise rotation instruction and a counterclockwise rotation instruction. When the rotating structure 20 receives the clockwise rotation instruction, the rotating structure 20 will rotate clockwise according to a preset rotation rate. When the rotating structure 20 receives the counterclockwise rotation command, the rotating structure 20 will rotate counterclockwise according to a preset rotation speed.

In one embodiment, the rotating structure 20 includes: a cylindrical mirror 22 for fixing the material 30 to be tested, a rotating motor 21, and a rotating rod 23 with one end of the cylindrical mirror 22 fixed, and the rotating motor 21 drives the rotating rod 23 and The excitation light source 11 rotates synchronously. Optionally, both the excitation light source 11 and the cylindrical mirror 22 are connected to the rotating motor 21, and the rotating motor 21 drives the excitation light source 11 and the cylindrical mirror 22 to rotate synchronously at a preset incident angle, that is, the excitation light source 11 is opposite to the cylindrical mirror 22. The incident angle of the material 30 to be tested on the surface remains unchanged, so that the detection structure obtains the laser beams of different rotation angles under the incident angle from the cylindrical mirror 22, and the cylindrical mirror 22 can emit uniform laser beams to the space .

In one embodiment, the angle adjustment mechanism 12 includes an adjustment rod 122 with one end fixed to the excitation light source 11 and an adjustment motor 121 connected to the other end of the adjustment rod 122. The adjustment motor 121 is used to drive the adjustment rod 122 to rotate relative to the cylindrical mirror 22 to Adjust the value of the angle of incidence. Specifically, the adjustment motor 121 receives the adjustment instruction and adjusts the value of the incident angle according to the adjustment instruction. After the adjustment is in place, the adjustment motor 121 stops power output. The rotating motor 21 drives the adjusting motor 121 to rotate synchronously with the cylindrical mirror 22, and the incident angle of the excitation light source 11 remains unchanged.

Optionally, both the adjusting motor 121 and the rotating rod 23 are connected to the rotating output shaft of the rotating motor 21 , and the adjusting rod 122 is connected to the rotating output shaft of the adjusting motor 121 .

In one embodiment, the rotation direction of the rotary motor 21 is set to be the same as the rotation direction of the adjustment motor 121 . That is, the incident direction of the excitation light beam emitted by the excitation light source 11 is consistent with the rotation direction of the rotating structure 20. For example, when the excitation light beam is irradiated on the surface of the material 30 to be measured in a clockwise direction of 45°, the rotating structure 20 needs to rotate in a clockwise direction. , when the excitation beam is irradiated on the surface of the material 30 to be tested at a counterclockwise direction of 45°, the rotating structure 20 needs to rotate counterclockwise.

In one embodiment, the detection structure includes: an optical collection unit 41 receiving the received laser beam and an optical detection unit 42 connected to the optical collection unit 41 , and the optical detection unit 42 obtains a corresponding fluorescence spectrum according to the received laser beam. The optical collection unit 41 is connected to the optical detection unit 42 through an optical fiber 60 . Under a certain incident angle, the optical collection unit 41 is used to collect the stimulated laser beam generated by the material 30 to be tested at different rotation angles during the rotation process of the material 30 to be tested, and transmit the laser beam through the optical fiber 60 To the optical detection unit 42 , the optical detection unit 42 generates a corresponding fluorescence spectrum after receiving the stimulated fluorescence light beam, so as to obtain the stimulated fluorescence spectrum of the material 30 under different rotation angles.

In one embodiment, the optical collecting unit 41 includes a polarizing prism 411 for polarizing the received laser beam, a filter mechanism 412 for filtering the polarized received laser beam, and an optical collector for receiving the received laser beam in the filter mechanism 412 413. The optical collection unit 41 also includes a polarizing motor that controls the rotation of the polarizing prism 411. The polarizing motor changes the direction of the polarizing prism 411, and divides the spectrum of the laser beam generated by the material 30 under test under the irradiation of the excitation beam into S polarized light or P polarized light. Light. Under the irradiation of the exciting beam, the material 30 to be tested generates a laser beam, which is received into the optical detection unit 42 through the optical fiber 60 . Since the luminous power of the excitation light source 11 is generally high, part of the excitation light beam will pass through the material 30 to be tested and enter the optical detection unit 42 , which will affect the test analysis of the luminous angle distribution of the material 30 to be tested. Therefore, before the optical detection unit 42 and after the polarizing prism 411 , a filter mechanism 412 is provided to filter the excitation beam transmitted to the optical detection unit 42 .

In one embodiment, the filter mechanism 412 includes a filter wheel 4121 and a filter, the filter wheel 4121 is provided with a plurality of filter holes 63, each filter hole 63 is provided with a filter, each filter Used to filter excitation beams of different wavelengths. Optionally, the optical filter is a high-pass optical filter. The filter mechanism 412 also includes a filter motor 4122. According to the wavelength of the monochromatic excitation beam, the filter motor 4122 drives the filter wheel 4121 to rotate, so that the corresponding high-pass filter is located between the polarizing prism 411 and the optical detection unit 42, so that Filter the corresponding excitation beam. Optionally, the hole center of the filter hole 63 is also at the center of the optical axes of the cylindrical lens 22 and the material 30 to be tested.

Optionally, the position of the optical detection unit 42 is fixed, and the material to be tested 30 and the excitation light source 11 are rotated angle by angle driven by the rotating motor 21 , so the fluorescence spectra of the material to be tested 30 at different rotation angles can be obtained. Specifically, the rotating motor 21 rotates according to the rotating direction of the adjusting motor 121 , and rotates within a certain angle range with a step angle of 0.5° or 1°, and obtains the angular characteristic distribution of the material 30 to be tested. The step angle of 0.5° or 1° is just a reference value provided by this embodiment, but is not limited to these two values.

Fig. 4 is the fluorescence spectrum of 710nm wavelength after rotating 0 ~ 90 °, the amplitude at various angles, the horizontal axis of this fluorescence spectrum is the rotation angle of the material 30 to be measured, the vertical axis of the fluorescence spectrum is the material 30 to be measured at The intensity of the subject laser beam under different rotation angles can evaluate the angle-dependent characteristics of the test material 30 by analyzing the magnitude of the intensity of the subject laser beam produced by the test material 30 at each rotation angle, for example, when the fluorescence spectrum The analysis module detects that when the rotation angle is in the range of 55 degrees to 60 degrees, the intensity of the stimulated fluorescence beam increases to the highest, and according to the preset fitting model, the intensity of the stimulated fluorescence beam of the material 30 to be tested can be obtained. Interval angle dependence.

The purpose of the cylindrical mirror 22 provided in this embodiment is to enable the stimulated laser beam generated by the stimulated radiation of the material 30 to be tested to enter the optical detection unit 42 uniformly, but is not limited to the cylindrical mirror 22 . In one embodiment, the material 30 to be tested is attached to the cylindrical mirror 22 and located at the geometric center of the cylindrical mirror 22 , and the geometric centers of the cylindrical mirror 22 , the polarizing prism 411 and the optical collector 413 are collinearly arranged. The material 30 to be tested needs to be attached to the geometric center of the cylindrical mirror 22, and the geometric center of the cylindrical mirror 22, the geometric center of the polarizing prism 411 and the geometric center of the optical collector 413 are kept at the same level and height in space, that is collinear setting. The optical collector 413 and the optical detection unit 42 are connected through an optical fiber 60 to detect the fluorescence spectrum of the measured material 30 under different rotation angles. After the subject material 30 passes through the cylindrical mirror 22, it diverges freely in space, passes through the polarizing prism 411 and the optical filter, and then reaches the optical collector 413. The optical collector 413 is connected with an optical fiber 60, and the subject beam The beam is transmitted to an optical detection unit 42 .

Optionally, the optical detection unit 42 can obtain the fluorescence spectra of the material 30 to be measured under different rotation angles. The fluorescence spectrum is wide, and the amplitude changes of a certain fixed wavelength at various angles are generally extracted, and its angular distribution characteristics are evaluated.

In one embodiment, the excitation light source 11 includes a monochromator 111 for generating an excitation beam and a lens group 112 for collimating the excitation beam. The monochromator 111 and the lens group 112 are connected through an optical fiber 60 . The lens group 112 is connected to the adjusting rod 122 .

The embodiment of the present invention also provides a test method of fluorescence spectrum, and the test method comprises the following steps:

S1: Generate an excitation beam with a preset wavelength through the excitation light source 11, and irradiate the excitation beam on the surface of the material 30 to be measured at a preset incident angle, and adjust the value of the incident angle through the angle adjustment mechanism 12;

S2: Using the rotating structure 20 to fix the material 30 to be tested, and synchronously rotate the material 30 to be tested and the excitation light source 11 according to the control instruction input by the user;

S3: Use the detection structure 40 to receive the detected laser beam generated by the material 30 to be tested, and obtain the corresponding fluorescence spectrum according to the detected laser beam.

By obtaining the fluorescence spectrum of the material 30 to be tested at different rotation angles, the angle-dependent characteristics of the material 30 to be tested are analyzed, which solves the problems in the existing technology, usually through sideband radiation measurement, surface plasmon coupling measurement and in micro The dyed molecules in the cavity structure measure the dipole moment orientation of the OLED material, which leads to the problem of complicated measurement steps.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention. Inside.

Claims (10)

1. a test device of fluorescence spectrum, for obtaining the fluorescence spectrum of material to be tested, it is characterized in that, the test device of described fluorescence spectrum comprises: The excitation structure includes an excitation light source and an angle adjustment mechanism, the excitation light source is used to generate an excitation beam with a preset wavelength, and the excitation beam is incident on the surface of the material to be measured at a preset incident angle, and the angle adjustment mechanism is used to adjusting the value of the incident angle; a rotating structure for fixing the material to be tested, and synchronously rotating the material to be tested and the excitation light source according to a control command input by the user; and a detection structure, configured to receive the light beam generated by the material to be tested, and obtain a corresponding fluorescence spectrum according to the light beam; Wherein, the detection structure receives the detected laser beam from different positions of the material to be tested during the synchronous rotation of the material to be tested and the excitation light source. 2. The test device of fluorescence spectrum as claimed in claim 1, it is characterized in that: described rotating structure comprises: for the cylinder lens that described material to be tested is fixed, rotating motor and the rotation that one end consolidates described cylinder lens The rotating motor drives the rotating rod to rotate synchronously with the excitation light source according to the control instruction. 3. The test device of fluorescence spectrum as claimed in claim 2, it is characterized in that: the angle adjustment mechanism includes an adjustment rod with one end fixed to the excitation light source and an adjustment motor connected to the other end of the adjustment rod, the adjustment The motor is used to drive the adjusting rod to rotate relative to the cylindrical mirror to adjust the value of the incident angle. 4. The fluorescence spectrum testing device according to claim 3, characterized in that: the rotation direction of the rotating motor is set to be the same as the rotation direction of the adjusting motor. 5. The testing device for fluorescence spectrum as claimed in any one of claims 2-4, characterized in that: the detection structure comprises: an optical collection unit receiving the received laser beam and an optical detection unit connected to the optical collection unit unit, the optical detection unit obtains the corresponding fluorescence spectrum according to the received laser beam. 6. The test device of fluorescence spectrum as claimed in claim 5, it is characterized in that: the optical collection unit comprises a polarizing prism for polarizing the subject beam of light, a filter for filtering the subject beam of light after polarization An optical mechanism and an optical collector for receiving the received laser beam in the filter mechanism. 7. The testing device of fluorescence spectrum as claimed in claim 6, characterized in that: the filter mechanism includes a filter wheel and a filter, and the filter wheel is provided with a plurality of filter holes, each of the filters The optical filters are arranged in the light holes, and each of the optical filters is used to filter the excitation light beams of different wavelengths. 8. The testing device of fluorescence spectrum as claimed in claim 6, characterized in that: the material to be tested is attached to the cylindrical mirror and is located at the geometric center of the cylindrical mirror, the cylindrical mirror, the The geometric centers of the polarizing prism and the optical collector are collinearly arranged. 9 . The fluorescence spectrum testing device according to claim 1 , wherein the excitation light source comprises a monochromator for generating the excitation light beam and a lens group for collimating the excitation light beam. 10 . 10. a test method of fluorescence spectrum, it is characterized in that, described test method comprises: generating an excitation beam with a preset wavelength by an excitation light source, and irradiating the excitation beam on the surface of the material to be measured at a preset angle of incidence, and adjusting the value of the angle of incidence through an angle adjustment mechanism; Using a rotating structure to fix the material to be tested, and synchronously rotating the material to be tested and the excitation light source according to a control command input by the user; The detection structure is used to receive the subject laser beam generated by the material to be tested, and obtain the corresponding fluorescence spectrum according to the subject laser beam.