CN220154785U - Wavelength conversion device, light source device, and projection apparatus - Google Patents
Wavelength conversion device, light source device, and projection apparatus Download PDFInfo
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- CN220154785U CN220154785U CN202320526176.5U CN202320526176U CN220154785U CN 220154785 U CN220154785 U CN 220154785U CN 202320526176 U CN202320526176 U CN 202320526176U CN 220154785 U CN220154785 U CN 220154785U
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Abstract
The embodiment of the utility model provides a wavelength conversion device, which comprises a conical rod and a wavelength conversion element, wherein the conical rod is conical, the conical rod is provided with a through hole which is formed along the axial direction of the conical rod, two ends of the through hole are respectively provided with an inlet and an outlet, the aperture of the inlet is larger than that of the outlet, and the wavelength conversion element is arranged at the outlet. The cone rod is used for receiving excitation light entering the through hole at a preset angle, guiding the excitation light to the wavelength conversion element to be converted into laser light and then reflected towards the inlet, so that the laser light exits from the inlet, and the preset angle is smaller than 90 degrees. By adopting the cone rod to guide the excitation light to the wavelength conversion element, after the wavelength conversion element converts the excitation light into the excited light, the excited light can exit along the cone rod, so that the integration of the light inlet system and the light outlet system of the wavelength conversion element is realized, the number of elements of the fluorescence generation system is greatly reduced, and the system volume is reduced. In addition, the utility model also provides a light source device and projection equipment.
Description
Technical Field
The present utility model relates to the field of projection technologies, and in particular, to a wavelength conversion device, a light source device, and a projection apparatus.
Background
Fluorescent excitation light sources are commonly used in projection devices, and generally, a short-wave light source is used to irradiate a fluorescent material, the fluorescent material excites the light source to generate fluorescence, and the converted light is collected by an illumination system and then utilized, for example, a common fluorescent color wheel and the like.
In the current common fluorescence scheme, a light homogenizing device for exciting a light source and a light homogenizing device for converting light in an optical system are independent, the system is complex and low in efficiency, the system is large in size and low in energy utilization rate, and heat dissipation pressure of the system is high, so that a fluorescence excitation system for reducing the complexity of the system is urgently needed.
Disclosure of Invention
The utility model aims to provide a wavelength conversion device, a light source device and a projection device, so as to improve the problems.
In a first aspect, an embodiment of the present utility model provides a wavelength conversion device, including a tapered rod and a wavelength conversion element, where the tapered rod is tapered, the tapered rod has a through hole formed along an axis direction of the tapered rod, two ends of the through hole form an inlet and an outlet, respectively, and an aperture of the inlet is greater than an aperture of the outlet, and the wavelength conversion element is disposed at the outlet. The cone rod is used for receiving excitation light entering the through hole at a preset angle, guiding the excitation light to the wavelength conversion element to be converted into laser light and then reflected towards the inlet, so that the laser light is emitted from the inlet; the preset angle is an included angle formed by the principal ray of the incident light beam of the excitation light and the axial direction of the conical rod, and is smaller than 90 degrees.
In some embodiments, the incident beam of excitation light and the cone angle α of the tapered rod satisfy the following relationship:
alpha× (K+1/2) +beta+gamma < 90 DEG, wherein beta is the preset angle and gamma is 1/2 of the aperture angle of the incident beam formed by the excitation light.
In some embodiments, the tapered rod is provided with a light hole penetrating the tapered rod and communicating with the through hole, the light hole being used for the excitation light to enter the through hole.
In some embodiments, the axis direction of the light hole intersects with the axis direction of the through hole, and the included angle is equal to the preset angle.
In some embodiments, the tapered rod is provided with a light-transmitting film layer disposed on a side wall of the tapered rod, the light-transmitting film layer being for the excitation light to enter the through hole.
In some embodiments, the light-transmitting film layer is transparent to the excitation light and reflects the lasing light.
In a second aspect, an embodiment of the present utility model further provides a light source device, including an excitation light source and the wavelength conversion device, where the excitation light source is used to emit excitation light.
In some embodiments, the excitation light source includes a light source for emitting excitation light and a converging lens located on an optical path of the excitation light for converging light.
In some embodiments, the excitation light source further comprises a mirror positioned in the optical path of the excitation light and configured to reflect the excitation light into the tapered rod at the predetermined angle.
In a third aspect, an embodiment of the present utility model further provides a projection apparatus, including the light source device described above.
According to the wavelength conversion device, the light source device and the projection equipment provided by the utility model, the conical taper rod is adopted to guide the excitation light to the wavelength conversion element, after the wavelength conversion element converts the excitation light into the laser, the laser can be emitted along the taper rod, so that the integration of the light inlet system and the light outlet system of the wavelength conversion element is realized, the number of elements of the fluorescence generation system can be greatly reduced, and the system volume is further reduced.
The light source device and the projection equipment using the polarization device can reduce the volume and further miniaturize the device.
These and other aspects of the utility model will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a light source device according to a first embodiment of the present utility model.
Fig. 2 is a schematic diagram of light emitted from a tapered rod in the light source device shown in fig. 1.
Fig. 3 is a light path diagram of the tapered rod in the light source device shown in fig. 1 when light is transmitted.
Fig. 4 is a schematic structural diagram of a light source device according to a second embodiment of the present utility model.
Fig. 5 is a schematic structural diagram of a light source device according to a third embodiment of the present utility model.
Fig. 6 is a schematic structural diagram of another light source device according to the third embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the prior art, a fluorescence generating device generally includes an excitation light source and a wavelength conversion element, a light guide is disposed on a light path between the excitation light source and the wavelength conversion element, the excitation light emitted from the excitation light source is guided to the wavelength conversion element, and after the wavelength conversion element is converted into a laser light, another light guide is disposed, and the laser light is guided to emit, so that the volume of the fluorescence generating device is larger.
The inventor of the present utility model proposes a wavelength conversion device, a light source device, and a projection apparatus in an embodiment of the present utility model to reduce the volume of the wavelength conversion device. Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
First embodiment
As shown in fig. 1, the present embodiment provides a light source device 100, where the light source device 100 is used for generating fluorescence (i.e. receiving laser light), and specifically referring to fig. 1, the light source device 100 includes an excitation light source 210 and a wavelength conversion device 300, and the excitation light source 210 may be, for example, a laser light source 210, such as a blue laser light source 210. The excitation light source 200 is used for emitting excitation light.
The wavelength conversion device 300 comprises a tapered rod 310 and a wavelength conversion element 320, wherein the tapered rod 310 is used for guiding excitation light to the wavelength conversion element 320 for conversion. The wavelength conversion element 320 may include a substrate and a fluorescent conversion material disposed on the substrate, and when the excitation light is incident on the fluorescent conversion material, the excitation light may be converted into fluorescent light. As shown in fig. 2, the substrate may be a reflecting plate, and after the excitation light is converted into fluorescence by the fluorescence conversion material, the fluorescence can be reflected by the substrate, so that the converted laser light is reflected toward the incident direction.
The conical rod 310 is conical, the conical rod 310 is provided with a through hole 310 which is formed along the axial direction of the conical rod, the through hole 310 is a conical hole, the inner wall and the outer wall of the conical rod 310 are both conical curved surfaces, and the conical curved surfaces formed by the inner wall and the outer wall are coaxial. The two ends of the through hole 310 are respectively formed with an inlet 311 and an outlet 312, wherein the aperture of the inlet 311 is larger than that of the outlet 312, i.e. the inlet 311 is positioned at one end of the conical rod 310 with a larger size, and the outlet 312 is positioned at one end of the conical rod 310 with a smaller size.
The wavelength conversion element 320 is disposed at the outlet 312, wherein a side of the wavelength conversion element 320 where the fluorescent conversion material is disposed faces into the through hole 310, so that the excitation light propagating into the wavelength conversion element 320 from the through hole 310 can be directly conducted onto the fluorescent conversion material, thereby performing fluorescent conversion. In one embodiment, the size of the substrate of the wavelength conversion element 320 may be the same as the size of one end of the smaller size of the tapered rod 310, so that the substrate may be fixed to the tapered rod 310 by bonding or the like, and the arrangement area of the fluorescent conversion material on the substrate may be equal to the size of the outlet 312, so that the excitation light propagating from the through hole 310 to the outlet 312 may be in contact with the fluorescent conversion material, to improve the light efficiency, and the substrate may be fixed to the tapered rod 310 while the fluorescent conversion material completely covers the outlet 312 when the wavelength conversion element 320 is arranged.
The taper rod 310 is configured to receive the excitation light entering the through hole 310 at a preset angle, and guide the excitation light to be reflected toward the inlet 311 after being converted into the lasing light by the wavelength conversion element 320, so that the lasing light exits from the inlet 311, where the preset angle is an included angle formed by a principal ray of an incident light beam of the excitation light and an axial direction of the taper rod 310, and is smaller than 90 degrees. Specifically, as shown in fig. 1, excitation light may enter the through hole 310 from the inlet 311, and after entering the through hole 310, the excitation light is incident on the inner wall of the tapered rod 310 to be refracted one or more times, and finally propagates to the outlet 312 to contact with the fluorescent conversion material on the wavelength conversion element 320, so as to be converted into laser light. The predetermined angle may be an angle range in which the excitation light entering the through hole 310 may reach the wavelength conversion element 320 after one or more refractions at the inner wall of the tapered rod 310. Wherein the preset angle at which the excitation light is incident may be 90 ° or less.
Referring to fig. 3, in order to ensure the utilization rate of the excitation light entering the through hole 310, when the excitation light enters the through hole 310, it is necessary to make all the excitation light reach the fluorescent conversion material to be converted as much as possible, so as to reduce the leakage from the outlet 312. The incident beam of excitation light satisfies the following relationship with the taper angle α of the taper rod 310:
alpha× (K+1/2) +beta+gamma < 90 DEG, wherein beta is a preset angle, gamma is 1/2 of the aperture angle of the incident beam formed by the excitation light, i.e. the aperture angle of the incident beam is 2 gamma. When the taper angle α satisfies the above relationship, the excitation light can be contacted with the fluorescent conversion material after entering the through hole 310, and then converted into the laser without leaking out of the outlet 312, so that the utilization ratio of the excitation light is significantly improved.
In this embodiment, the excitation light source 200 includes a light source 210 and a converging lens 220, the light source 210 is used for emitting excitation light, the converging lens 220 is located on a light path of the excitation light and is used for converging light, the converging lens 220 may be a convex lens, which is not limited herein, and after the excitation light emitted by the light source 210 is converged by the converging lens 220, an optical expansion (i.e. a light spot) becomes smaller, so that the excitation light entering the through hole 310 is more converged, and thus the excitation light is easier to enter the through hole 310 entirely, and the incident angle β of the excitation light when entering the through hole 310 is easier to control.
After the wavelength conversion element 320 converts the excitation light into the laser light, the laser light is reflected toward the inlet 311, and the reflected laser light may directly exit the inlet 311, or may exit the inlet 311 after being reflected once or more times by the inner wall of the tapered rod 310, which is not limited herein.
In the light source device 100 of the present embodiment, the excitation light is conducted to the wavelength conversion element 320 through the taper rod 310, and meanwhile, the laser light converted by the wavelength conversion element 320 is also guided by the taper rod 310 and emitted, so that compared with the prior art, the number of elements can be reduced, and the volume of the light source device 100 can be further reduced, so that the light source device 100 has wider applicability.
Second embodiment
Referring to fig. 4, the present embodiment provides a light source device 100, which is different from the first embodiment in that the structure of the excitation light source 200 is different, and the same parts can be referred to in the related content of the first embodiment, and will not be described herein.
Specifically, in this embodiment, the excitation light source 200 further includes a reflecting mirror 230, where the reflecting mirror 230 is located on the optical path of the excitation light and is used for reflecting the excitation light. The reflecting mirror 230 may be disposed between the light source 210 and the converging lens 220, or may be disposed behind the converging lens 220, which is not limited herein, in this embodiment, the excitation light emitted from the light source 210 is focused by the converging lens 220, reflected by the reflecting mirror 230, and enters the through hole 310 from the inlet 311 at a preset angle.
By arranging the reflecting mirror 230, the reflecting angle of the reflecting mirror 230 can be easily adjusted, so that the incident angle of the excitation light entering the through hole 310 is changed, and the excitation light can be completely irradiated on the fluorescent conversion material of the wavelength conversion element 320 after being conducted by the taper rod 310, thereby improving the light efficiency of the excitation light. In particular, the mirror 230 may be provided in an adjustable fashion to facilitate adjustment of the reflection angle.
In the light source device 100 of the present embodiment, the excitation light is conducted to the wavelength conversion element 320 through the taper rod 310, and meanwhile, the laser light converted by the wavelength conversion element 320 is also guided by the taper rod 310 and emitted, so that compared with the prior art, the number of elements can be reduced, and the volume of the light source device 100 can be further reduced, so that the light source device 100 has wider applicability. Meanwhile, by arranging the reflecting mirror 230, the incident angle of the excitation light entering the through hole 310 can be conveniently adjusted, so that the excitation light can be completely irradiated on the fluorescent conversion material of the wavelength conversion element 320 after being conducted by the taper rod 310, and the light efficiency of the excitation light is improved
Third embodiment
Referring to fig. 5, the present embodiment provides a light source device 100, which is different from the first embodiment in that the cone rod 310 has a different structure, the incident mode of the excitation light source 200 is different, and only the different parts from the first embodiment will be described in detail below, and the same parts can be referred to the content of the first or second embodiment.
Specifically, in this embodiment, the excitation light directly passes through the tapered rod 310 from the outer wall of the tapered rod 310 into the through hole 310. As an embodiment, the taper rod 310 may be provided with a light hole 330, the light hole 330 penetrates the taper rod 310 and is communicated with the through hole 310, that is, the light hole 330 penetrates the outer wall and the inner wall of the taper rod 310, and the excitation light is directly incident into the through hole 310 from the light hole 330 and is reflected on the inner wall of the taper rod 310 one or more times to the wavelength conversion element 320, and then converted into the excitation light.
In order to facilitate adjustment of the incident angle of the incident excitation light, the axial direction of the light-transmitting hole 330 may be set to intersect with the axial direction of the through hole 310, and the included angle is smaller than 90 °, more particularly, the axial direction of the light-transmitting hole 330 may be parallel to the incident angle direction of the excitation light, so that the incident excitation light is prevented from being reflected by contacting with the inner wall of the light-transmitting hole 330, and the utilization rate of the excitation light is improved.
In another embodiment, as shown in fig. 6, the tapered rod 310 is provided with a light-transmitting film layer 340, the light-transmitting film layer 340 is disposed on a side wall of the tapered rod 310, the light-transmitting film layer 340 is used for allowing excitation light to enter the through hole 310, the excitation light can enter the through hole 310 through the light-transmitting film layer 340, wherein the tapered rod 310 can be provided with a light-transmitting hole 330, and an axial direction of the light-transmitting hole 330 intersects an axial direction of the through hole 310, and an included angle is equal to a preset angle. The light-transmitting film 340 is disposed at the light-transmitting hole 330 and covers the light-transmitting hole 330, and when the excitation light is incident on the light-transmitting film 340, the excitation light can enter the through hole 310 through the light-transmitting film 340. Further, the light-transmitting film layer 340 can selectively transmit the excitation light and reflect the laser light, and since the wavelengths of the excitation light and the laser light are different, the light-transmitting film layer 340 can select a wavelength splitting film, so that it can only transmit the excitation light and reflect the laser light, which has the following advantages: when the laser light converted by the wavelength conversion element 320 propagates in the tapered rod 310, the laser light does not escape through the light-transmitting film 340 when reaching the light-transmitting film 340, but is reflected by the light-transmitting film 340 and exits toward the inlet 311 for utilization, so that the utilization rate of the laser light can be improved.
Note that, the structure of the excitation light source 200 in this embodiment is the same as that of the first embodiment, and in other embodiments, the structure of the excitation light source 200 in the second embodiment may be adopted, and the present utility model is not limited thereto.
In the light source device 100 of the present embodiment, the excitation light is conducted to the wavelength conversion element 320 through the taper rod 310, and meanwhile, the laser light converted by the wavelength conversion element 320 is also guided by the taper rod 310 and emitted, so that compared with the prior art, the number of elements can be reduced, and the volume of the light source device 100 can be further reduced, so that the light source device 100 has wider applicability. Also, since excitation light can enter from the side wall of the taper rod 310, the dimension in the axial direction of the taper rod 310 can be further reduced.
The present embodiment also provides a projection apparatus (not shown) that may include the light source device 100 of any of the above embodiments as the fluorescent light source 210.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A wavelength conversion device, comprising:
the cone rod is provided with a through hole which is formed along the axial direction of the cone rod, an inlet and an outlet are respectively formed at two ends of the through hole, and the aperture of the inlet is larger than that of the outlet; and
a wavelength conversion element disposed at the outlet;
the cone rod is used for receiving excitation light entering the through hole at a preset angle, guiding the excitation light to the wavelength conversion element to be converted into laser light and then reflected towards the inlet, so that the laser light is emitted from the inlet; the preset angle is an included angle formed by the principal ray of the incident light beam of the excitation light and the axial direction of the conical rod, and is smaller than 90 degrees.
2. The wavelength conversion device according to claim 1, wherein a taper angle α of the incident beam of excitation light and the taper rod satisfies the following relationship:
alpha× (K+1/2) +beta+gamma < 90 DEG, wherein beta is the preset angle and gamma is 1/2 of the aperture angle of the incident beam formed by the excitation light.
3. The wavelength conversion device according to claim 1, wherein the tapered rod is provided with a light-transmitting hole penetrating the tapered rod and communicating with the through-hole, the light-transmitting hole being for the excitation light to enter the through-hole at the predetermined angle.
4. A wavelength conversion device according to claim 3, wherein the axial direction of the light-transmitting aperture intersects the axial direction of the through-hole and the included angle is equal to the predetermined angle.
5. The wavelength conversion device according to claim 1, wherein the tapered rod is provided with a light-transmitting film layer, the light-transmitting film layer being provided on a side wall of the tapered rod, the light-transmitting film layer being configured to allow the excitation light to enter the through hole.
6. The wavelength conversion device according to claim 5, wherein said light transmissive film layer is transparent to said excitation light and reflects said lasing light.
7. A light source device, comprising:
the excitation light source is used for emitting excitation light; and
a wavelength conversion device according to any one of claims 1 to 6.
8. The light source device according to claim 7, wherein the excitation light source includes a light source for emitting excitation light and a converging lens located on an optical path of the excitation light and for converging light.
9. The light source device of claim 8, wherein the excitation light source further comprises a mirror positioned in the optical path of the excitation light and configured to reflect the excitation light into the tapered rod at the predetermined angle.
10. Projection apparatus comprising a light source device according to any of claims 7-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320526176.5U CN220154785U (en) | 2023-03-09 | 2023-03-09 | Wavelength conversion device, light source device, and projection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320526176.5U CN220154785U (en) | 2023-03-09 | 2023-03-09 | Wavelength conversion device, light source device, and projection apparatus |
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| Publication Number | Publication Date |
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| CN220154785U true CN220154785U (en) | 2023-12-08 |
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| CN202320526176.5U Active CN220154785U (en) | 2023-03-09 | 2023-03-09 | Wavelength conversion device, light source device, and projection apparatus |
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| CN (1) | CN220154785U (en) |
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