Laser fluorescent powder testing device

Abstract

The invention discloses a laser fluorescent powder testing device, and belongs to the technical field of fluorescent powder testing, the laser fluorescent powder testing device comprises a slide rail, and a laser emission assembly, an adjusting support and a laser detection assembly which are adjustably mounted on the slide rail, the laser emission assembly comprises a laser, and the adjusting support comprises a first translation stage slidably mounted on the slide rail; a second translation platform is installed on the first translation platform, a rotary displacement platform is installed on the second translation platform, a first vertical displacement platform is installed on the rotary displacement platform, a carrier used for coating fluorescent powder is installed on the rotary displacement platform, a collimating lens is attached to the carrier, and the laser detection assembly comprises a detector. The laser, the carrier, the collimating lens and the detector are located on the same axis; after the fluorescent powder is excited by the laser, the light in the Lamberg distribution is converted into the collimated light, so that the detection convenience is improved, and the accuracy of the detection result is improved.

Description

Technical Field

[0001] The invention relates to the technical field of phosphor testing, and in particular to a laser phosphor testing device. Background Art

[0002] Phosphor is a special fluorescent material. It can only react with light of a specific wavelength to emit light. The luminescence process often involves the conversion of light wavelengths, such as converting infrared light into visible light.

[0003] The detection of phosphors depends on whether the phosphors can be excited according to the theory after preparation, what is the wavelength of the excited light, and the excitation efficiency, that is, how much fluorescence can be excited by a unit of excitation light intensity. However, when the phosphor is excited by the laser and emits light, the emitted light is Lambertian distribution, not collimated light, which is not convenient for detection, and the reference value of the test results is low. At the same time, when testing, the phosphor to be tested needs to be smeared and placed between the laser emitting end and the laser receiving end. Generally speaking, the position of the phosphor needs to be adjusted to be on the axis of the laser emitting end and the laser receiving end. Therefore, it is also necessary to consider adjusting the position of the phosphor.

[0004] In summary, when detecting phosphors, it is necessary to achieve that the phosphors are covered with light by the laser emitting end, and at the same time, the light emitted after fluorescence excitation is collimated and converted to increase the amount of light received by the detector. Summary of the invention

[0005] The purpose of the present invention is to provide a laser phosphor testing device, which can realize the light surface adjustment of the laser covered phosphor before testing, and at the same time convert the Lambertian distributed light into collimated light after the phosphor is excited by the laser to increase the amount of light received by the detector, improve the detection convenience, and improve the accuracy of the detection results.

[0006] To achieve the above object, the present invention provides the following technical solutions: A laser phosphor testing device comprises a slide rail and a laser emitting assembly adjustably mounted on the slide rail, an adjusting bracket and a laser detection assembly, wherein the laser emitting assembly comprises a laser, the adjusting bracket comprises a first translation stage slidably mounted on the slide rail, a second translation stage is mounted on the first translation stage, a rotational displacement stage is mounted on the second translation stage, a first vertical displacement stage is mounted on the rotational displacement stage, a carrier for applying phosphor is mounted on the rotational displacement stage, a collimating lens is attached to the carrier, and the laser detection assembly comprises a detector. During testing, the laser, the carrier, the collimating lens and the detector are located on the same axis.

[0007] Preferably, the collimating lens comprises a reference surface and a first free-form surface protruding from the reference surface, the collimating lens is provided with a light-transmitting groove opening away from the reference surface, a second free-form surface protruding toward the opening is provided in the light-transmitting groove, and a Fresnel lens is bonded to the reference surface. Preferably, a recess is provided on the carrier, the open end of the light-transmitting groove extends into the recess and fits the carrier; a portion for applying fluorescent powder is provided in the middle of the recess, and a uniform light lens is provided on the recess to cover the portion for applying fluorescent powder, and the convex surface of the uniform light lens shines toward one side of the light-transmitting groove.

[0008] Preferably, the bottom surface of the recess is a curved structure.

[0009] Preferably, a first support rod and a first adjustment frame mounted on the first support rod are mounted on the rotational translation platform, and the carrier is mounted on the first adjustment frame.

[0010] Preferably, the laser detection assembly includes a slider slidably mounted on a slide rail, a second vertical displacement platform is mounted on the slider, a second support rod is mounted on the second vertical displacement platform, a second adjustment frame is mounted on the second support rod, and the detector is mounted on the second adjustment frame.

[0011] Preferably, the first adjustment frame and the second adjustment frame have the same structure, and are both integrated with three knobs for adjusting the angle.

[0012] Preferably, the laser emitting assembly includes a slide seat slidably mounted on a slide rail, a plurality of third support rods are installed on the slide seat at intervals, a mounting plate is provided on the third support rods, a collimator and a pigtail connected to the collimator are mounted on the mounting plate, the laser is mounted on the mounting plate, and the laser emitting end of the laser is connected to the pigtail.

[0013] Preferably, the first translation stage, the sliding block and the sliding seat are all equipped with tightening knobs.

[0014] Preferably, the slide rail comprises a mounting seat and a sliding portion arranged on the mounting seat, the sliding portion has a guide portion with an inverted trapezoidal cross-section, and the mounting seat is provided with mounting strip holes located on both sides of the sliding portion and arranged at intervals along the length direction.

[0015] By slidingly setting the laser emission component, the adjustment bracket and the laser detection component on the slide rail, the laser, the carrier, the collimating lens and the detector can be adjusted to the same axis by adjusting the distance when the laser is initially emitted, and then the distance can be adjusted according to the light surface coverage; specifically, the position movement on the slide rail is achieved by adjusting the first translation stage in the bracket, and the position of the rotation stage is fine-tuned by the second translation stage. At the same time, the first vertical translation stage can adjust the height of the carrier, so that the carrier and the collimating lens can be adjusted in four dimensions of X direction, Y direction, Z direction and rotation direction to meet the laser coverage requirements; the light of Lambert distribution is converted into collimated light through the collimating lens, the amount of light received by the detector is increased, and the detection accuracy is improved; At the same time, it is easy to adjust the distance so that the distance between the carrier and the detector can be increased, and a gas chamber can be placed in it to conduct a gas absorption test of the excitation light, thereby increasing the detection diversity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 Schematic diagram of the structure of the collimating lens in an embodiment of the present invention; Figure 3 Schematic diagram of the collimated conversion of excitation light in an embodiment of the present invention; Figure 4 This is the irradiance diagram of light emitted directly from the phosphor; Figure 5 This is the light intensity distribution curve directly emitted by the phosphor; Figure 6 This is the irradiance diagram of the excitation light emitted through the collimating lens; Figure 7 It is the light intensity distribution curve of the excitation light emitted through the collimating lens; exist Figures 1 to 7 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows: Slide rail 1, mounting seat 101, sliding part 102, guiding part 103, mounting bar hole 104, laser emitting assembly 2, laser 21, slide seat 22, third support rod 23, mounting plate 24, collimator 25, pigtail 26, adjustment bracket 3, first translation stage 31, second translation stage 32, rotation displacement stage 33, first vertical displacement stage 34, first support rod 35, first adjustment frame 36, laser detection assembly 4, detector 41, slider 42, second vertical displacement stage 43, second support rod 44, second adjustment frame 45, carrier 5, recess 50, collimating lens 6, reference plane 61, first free-form surface 62, light-transmitting groove 63, second free-form surface 64, Fresnel lens 65, tightening knob 7, homogenizing lens 8. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] See also Figure 1-Figure 3 As shown, in an embodiment of the present invention, a laser phosphor testing device is proposed, comprising a slide rail 1 and a laser emitting assembly 2 adjustably mounted on the slide rail 1, an adjusting bracket 3 and a laser detection assembly 4, wherein the laser emitting assembly 2 comprises a laser 21, and the adjusting bracket 3 comprises a first translation stage 31 slidably mounted on the slide rail 1, a second translation stage 32 is mounted on the first translation stage 31, a rotation displacement stage 33 is mounted on the second translation stage 32, a first vertical displacement stage 34 is mounted on the rotation displacement stage 33, the first vertical displacement stage 34 is mounted on the second translation stage 32, a carrier 5 for applying phosphor is mounted on the rotation displacement stage 33, and a collimating lens 6 is attached to the carrier 5, wherein the first translation stage 31 adjusts the position of the entire adjusting bracket 3 on the slide rail 1, and the second translation stage 32 realizes displacement fine-tuning, vertical adjustment relative to the moving direction of the first translation stage 31, and rotation The displacement stage 33 realizes angle adjustment, while the first vertical displacement stage 34 realizes height adjustment. Therefore, the entire adjustment bracket 3 can realize four-dimensional adjustment of the carrier 5 and the collimating lens 6 in the X direction, Y direction, Z direction and rotation direction, to ensure that the position of the fluorescent powder coated on the carrier 5 meets the coverage surface of the laser emission. The complete coverage is mainly to achieve full excitation of the coated fluorescent powder, so as to ensure a more comprehensive evaluation in the fluorescent powder detection conclusion; it should be noted that the adjustment of the position of the carrier 5 only considers that the greater the distance from the laser 21, the easier it is for the fluorescent powder to be fully covered by the laser, and the smaller the distance, the smaller the coverage. Therefore, according to the actual determined position of the laser 21, the carrier position and angle can be appropriately adjusted. It does not need to be adjusted very precisely, as long as the light covers the fluorescent powder. It can be directly adjusted by observing the spacing parameters given by the original parameters of the laser 21. Of course, it is generally mainly used to observe the light coverage. Among them, the first translation stage 31, the second translation stage 32, the rotational translation stage 33 and the first vertical translation stage 34 are all existing precision adjustment structures, such as using a screw nut structure or directly using a threaded connection structure to achieve adjustment, or directly using mature products in combination for application.

[0019] At the same time, the laser detection component 4 includes a detector 41. During testing, the laser 21, the carrier 5, the collimating lens 6 and the detector 41 are located on the same axis. When adjusting, the distance between the laser emitting component 2, the adjustment bracket 3 and the laser detection component 4 is reduced to meet the needs of rapid alignment during the adjustment process. After adjusting to the same axis, the distance is adjusted farther to facilitate the carrier 5 to be covered by the laser surface and ensure the detection results. At the same time, the distance can also be adjusted according to other needs, such as adjusting the distance between the carrier 5 and the detector 41, placing an air chamber therein, and conducting a gas absorption test of the excitation light to increase the detection diversity. Therefore, the adjustable method can not only facilitate the improvement of the efficiency of the alignment of the test location, but also increase the detection device and auxiliary accessories, and increase the detection items.

[0020] Specifically, the collimating lens 6 converts the light of the Lambert distribution emitted by the laser after fluorescence excitation into collimated light, so that it is easy to enter the detector 41 for detection and improve the accuracy. Specifically, the light of the Lambert distribution is scattered in all directions, and the collimating lens 6 is needed to collimate all the light beams into parallel light, so as to improve the detection accuracy of the detector 41. Figure 4 , Figure 5 As shown, it is the irradiance diagram and light intensity distribution curve diagram of the directly emitted light detected by the excitation light of the Lambertian distribution; and Figure 6 , Figure 7 The figure shows the light irradiance diagram and light intensity distribution diagram formed after the excitation light passes through the collimating lens 6. From this, it can be seen that the output light after passing through the collimating lens 6 has a small divergence angle and is approximately collimated, which is convenient for detection.

[0021] The collimating lens 6 includes a reference surface 61 and a first free-form surface 62 protruding from the reference surface 61. The collimating lens 6 is provided with a light-transmitting groove 63 opening away from the reference surface 61. A second free-form surface 64 protruding toward the opening is provided in the light-transmitting groove 63. The light-transmitting groove 63 accommodates the light of the Lambert distribution excited by the phosphor from the carrier 5. The light passes through the side of the light-transmitting groove 63, is reflected by the first free-form surface 62, and is vertically emitted from the reference surface 61. The light passes through the second free-form surface 64 and is vertically emitted from the reference surface 61, thereby realizing the light collimation conversion. The light beam emitted from the reference surface 61 is parallel and can be vertically emitted into the detector 41 to ensure the detection accuracy. At the same time, a Fresnel lens 65 is attached to the reference surface 61 to further focus the collimated light to form converged light, thereby ensuring that the light can enter the detector 41.

[0022] Specifically, the surface parameters of the second free-form surface 64 and the first free-form surface 62 are pre-defined according to the collimation conversion and are finalized after processing. The collimating lens 6 can be replaced according to different Lambert distribution lights, but the specific structure does not need to be changed to ensure the stability of the light collimation conversion.

[0023] In order to ensure that all the light beams of Lambertian distribution excited by the fluorescent powder can be injected into the collimating lens 6, a recess 50 is opened on the carrier 5, and the open end of the light-transmitting groove 63 extends into the recess and fits the carrier 5. The middle part of the recess 50 is provided with a part for applying the fluorescent powder, and the recess 50 is provided with a homogenizing lens 8 covered on the part where the fluorescent powder is applied. The convex surface of the homogenizing lens 8 shines on one side of the light-transmitting groove 63. The laser excites scattered light after passing through the fluorescent powder, and further passes through the homogenizing lens 8 to make the intensity of the scattered light uniformly distributed, which is more conducive to detection by the detector 41, and the light of uniform intensity is emitted to the surroundings in the light-transmitting groove 63. As many excitation light beams as possible can be collimated and converted, thereby increasing the number of light beams emitted from the reference plane 61, increasing the coverage area, and improving the detection accuracy.

[0024] Specifically, in order to achieve a better excitation light emission effect after the fluorescent powder is applied, the bottom surface of the concave portion 50 is a curved surface structure.

[0025] At the same time, after other adjustments have been made, when fine-tuning the angles of the carrier 5 and the collimating lens 6, a first support rod 35 and a first adjustment frame 36 installed on the first support rod 35 can be installed on the rotational translation stage 33, and the carrier 5 is installed on the first adjustment frame 36, and fine-tuning is achieved through the first adjustment frame 36. The first adjustment frame 36 is a conventional angle adjustment bracket 3, and has three knobs to achieve corresponding angle fine-tuning, so as to meet the correspondence between the emitted light and the detector 41.

[0026] Specifically, the laser emitting component 2 and the laser detecting component 4 are relatively fixed before the phosphor test. Of course, before the specific test begins, the laser 21 and the detector 41 in the laser emitting component 2 and the laser detecting component 4 can be pre-adjusted to the same axis, and no adjustment is required during the subsequent phosphor testing process.

[0027] At the same time, the laser detection assembly 4 includes a slider 42 slidably mounted on the slide rail 1, a second vertical displacement platform 43 is mounted on the slider 42, a second support rod 44 is mounted on the second vertical displacement platform 43, a second adjustment frame 45 is mounted on the second support rod 44, and the detector 41 is mounted on the second adjustment frame 45. The X direction and Z direction of the detector 41 are adjusted by the second vertical displacement platform 43, the second support rod 44 and the second adjustment frame 45. While maintaining a unified horizontal line, the angle of the detector 41 is further fine-tuned by the second adjustment frame 45 to match the light emitted from the collimating lens 6.

[0028] Specifically, the first adjustment frame 36 and the second adjustment frame 45 have the same structure and are both integrated with three knobs for adjusting the angle. The first adjustment frame 36 and the second adjustment frame 45 can adopt existing precision structures. After other adjustment methods are in place, fine-tuning is used to improve detection accuracy.

[0029] Specifically, the laser emitting assembly 2 includes a slide seat 22 slidably mounted on the slide rail 1, a plurality of third support rods 23 are installed at intervals on the slide seat 22, a mounting plate 24 is provided on the third support rod 23, a collimator 25 and a pigtail 26 connected to the collimator 25 are installed on the mounting plate 24, the laser 21 is mounted on the mounting plate 24, and the laser emitting end of the laser 21 is connected to the pigtail 26, the position of the third support rod 23 and the mounting plate 24 is moved by the slide seat 22 to adjust the position of the laser 21, the laser emitted by the laser 21 is collimated by the collimator 25 and emitted through the pigtail 26, thereby ensuring that the light beam from the laser 21 to the carrier 5 is parallel, satisfying the requirement of covering the input end of the carrier 5 coated with fluorescent powder.

[0030] At the same time, in order to ensure that the first translation platform 31 , the slider 42 and the slide seat 22 need to be locked after sliding relative positions on the slide rail 1 , a locking knob 7 is installed on the first translation platform 31 , the slider 42 and the slide seat 22 .

[0031] At the same time, the slide rail 1 includes a mounting seat 101 and a sliding portion 102 arranged on the mounting seat 101, the sliding portion 102 has a guide portion 103 with an inverted trapezoidal cross-section, and the mounting seat 101 is provided with mounting strip holes 104 located on both sides of the sliding portion 102 and arranged at intervals along the length direction, wherein the guide portion 103 realizes limiting, and the limiting portion can only slide along the length direction when sliding, and at the same time, the entire slide rail 1 is fixed to the detection device through the mounting strip holes 104 to form an integration.

[0032] Of course, the existing slide rail 1 structure can also be used as the guide basis.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A laser phosphor testing device, characterized in that: The invention comprises a slide rail (1), a laser emitting assembly (2) adjustably mounted on the slide rail (1), an adjusting bracket (3), and a laser detecting assembly (4); the laser emitting assembly (2) comprises a laser (21); the adjusting bracket (3) comprises a first translation stage (31) slidably mounted on the slide rail (1); a second translation stage (32) is mounted on the first translation stage (31); a rotation stage (33) is mounted on the second translation stage (32); a first vertical displacement stage (34) is mounted on the rotation stage (33); a carrier (5) for applying fluorescent powder is mounted on the rotation stage (33); a collimating lens (6) is bonded to the carrier (5); the laser detecting assembly (4) comprises a detector (41); during testing, the laser (21), the carrier (5), the collimating lens (6), and the detector (41) are located on the same axis.

2. A laser phosphor testing device according to claim 1, characterized in that: The collimating lens (6) comprises a reference surface (61) and a first free-form surface (62) protruding from the reference surface (61); the collimating lens (6) is provided with a light-transmitting groove (63) opening on a side away from the reference surface (61); and a second free-form surface (64) protruding towards the opening side is provided in the light-transmitting groove (63); A Fresnel lens (65) is bonded onto the reference surface (61).

3. A laser phosphor testing device according to claim 2, characterized in that: The carrier (5) is provided with a recess (50), and the open end of the light-transmitting groove (63) extends into the recess and fits the carrier (5); A portion for applying fluorescent powder is provided in the middle of the concave portion (50), and a light homogenizing lens (8) is provided on the concave portion (50) to cover the portion for applying fluorescent powder, with the convex surface of the light homogenizing lens (8) illuminating one side of the light-transmitting groove (63).

4. The laser phosphor testing device according to claim 3, characterized in that: The bottom surface of the recess (50) is a curved surface structure.

5. A laser phosphor testing device according to any one of claims 1 to 4, characterized in that: A first support rod (35) and a first adjustment frame (36) mounted on the first support rod (35) are mounted on the rotational translation stage (33), and the carrier (5) is mounted on the first adjustment frame (36).

6. The laser phosphor testing device according to claim 5, characterized in that: The laser detection assembly (4) comprises a slider (42) slidably mounted on a slide rail (1); a second vertical displacement platform (43) is mounted on the slider (42); a second support rod (44) is mounted on the second vertical displacement platform (43); a second adjustment frame (45) is mounted on the second support rod (44); and the detector (41) is mounted on the second adjustment frame (45).

7. The laser phosphor testing device according to claim 6, characterized in that: The first adjustment frame (36) and the second adjustment frame (45) have the same structure, and are both integrated with three knobs for adjusting angles.

8. The laser phosphor testing device according to claim 6, characterized in that: The laser emitting assembly (2) comprises a slide seat (22) slidably mounted on a slide rail (1); a plurality of third support rods (23) are installed at intervals on the slide seat (22); a mounting plate (24) is provided on the third support rods (23); a collimator (25) and a pigtail (26) connected to the collimator (25) are installed on the mounting plate (24); the laser (21) is mounted on the mounting plate (24), and a laser emitting end of the laser (21) is connected to the pigtail (26).

9. The laser phosphor testing device according to claim 8, characterized in that: The first translation platform (31), the sliding block (42) and the sliding seat (22) are all equipped with a tightening knob (7).

10. The laser phosphor testing device according to claim 5, characterized in that: The slide rail (1) comprises a mounting seat (101) and a sliding portion (102) arranged on the mounting seat (101); the sliding portion (102) has a guide portion (103) with an inverted trapezoidal cross section; and the mounting seat (101) is provided with mounting bar holes (104) located on both sides of the sliding portion (102) and arranged at intervals along the length direction.

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