Light beam excitation device and light source

Abstract

The embodiment of the invention relates to the technical field of optics, and discloses a light beam excitation device and a light source. A light-emitting surface and a backlight surface which are opposite to each other are arranged on a wavelength conversion part, and at least one of a plurality of adjacent side surfaces between the edges of the light-emitting surface and the backlight surface is configured as an excitation surface, so that an excitation light source emits a first light beam towards at least one excitation surface to excite the wavelength conversion part to emit a second light beam emitted from the light-emitting surface; therefore, a part of the first light beam used for exciting the wavelength conversion part and the second light beam are not emitted in the same direction due to mirror reflection of the light emitting surface of the wavelength conversion part, the purity and accuracy of the obtained second light beam are guaranteed, and the light beam excitation effect is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical technology, and specifically to a light beam excitation device and a light source. Background Art

[0002] At present, with the development of technology, people's use of light is no longer limited to lighting. Different lights can be used in all walks of life to achieve many technical effects. In order to obtain a light beam that meets the work requirements, people often use wavelength conversion components. The wavelength conversion component is a light-emitting material that can emit light of a new wavelength after absorbing light energy of a specific wavelength. It is widely used in various lighting and display fields. In practical applications, the first wavelength light emitted by the light source in the light beam excitation device excites the wavelength conversion component. After being excited, the wavelength conversion component emits a second wavelength of light from the light outlet. The first wavelength light beam and the second wavelength light beam are merged to obtain the desired light.

[0003] However, in the actual application of the light beam excitation device, there is often a defect at the light outlet that easily leaks the excitation light source used to excite the wavelength conversion component, thereby affecting the purity and accuracy of the light emitted by the light beam excitation device, which is not conducive to people's use for work. Summary of the invention

[0004] In view of the above problems, an embodiment of the present application provides a light beam excitation device and a light source, which are used to solve the problem that the light outlet of the light beam excitation device is prone to blue leakage during operation.

[0005] According to one aspect of an embodiment of the present application, a light beam excitation device is provided, which includes: a base, a wavelength conversion component and an excitation light source, wherein the wavelength conversion component and the excitation light source are both arranged on the base; the wavelength conversion component is provided with a light-emitting surface and a backlight surface relative to each other, and a plurality of side surfaces are adjacent to the light-emitting surface and the backlight surface, and at least one side surface is configured as an excitation surface; the excitation light source emits a first light beam toward at least one excitation surface to excite the wavelength conversion component; the wavelength conversion component is used to convert at least part of the first light beam into a second light beam when excited by the first light beam, and the second light beam is emitted from the light-emitting surface. By arranging opposite light-emitting surfaces and backlight surfaces and an excitation surface adjacent to the edges of the light-emitting surfaces and the backlight surfaces on the wavelength conversion component, the excitation light emitted by the excitation light source is irradiated on the excitation surface of the wavelength conversion component to excite the wavelength conversion component, and the light emitted from the light-emitting surface after the wavelength conversion component is excited is utilized, thereby avoiding the problem that the excitation light will contaminate the light emitted by the wavelength conversion component when the surface of the wavelength conversion component receiving the excitation light and emitting the light is the same surface, making the light beam obtained by excitation purer, and there is no need to arrange additional components to process the excitation light emitted by the light-emitting surface, avoiding blocking of the light beam, improving the utilization rate of light, and ensuring the quality of the light beam.

[0006] In an optional manner, the excitation light source is configured to emit a first light beam inclined toward the backlight surface, and the smaller angle between the straight line where the optical axis of the first light beam is located and the plane where the light-emitting surface is located is greater than or equal to half of the divergence angle of the first light beam. By making the first light beam emitted by the excitation light source inclined toward the backlight surface, and the smaller angle between the straight line where the optical axis of the first light beam is located and the plane where the light-emitting surface is located is greater than or equal to half of the divergence angle of the first light beam, there will be no first light beam inclined toward the light-emitting surface in the light beam excitation device provided in the embodiment of the present application, that is, it is ensured that no first light beam penetrates the wavelength conversion component and is emitted from the light-emitting surface, so that when the light beam excitation device provided in the embodiment of the present application emits a second light beam from the light-emitting surface, the second light beam will not be mixed with a part of the first light beam that penetrates the light-emitting surface, thereby improving the purity of the obtained second light beam. When it is necessary to obtain a mixed light of the first light beam and the second light beam, since the first light beam will not leak a stronger first light beam from the light outlet due to the mirror reflection of the light-emitting surface of the wavelength conversion component, the final mixed light of the first light beam and the second light beam can be made more uniform and the light beam color can be purer.

[0007] In an optional manner, the excitation light source is configured to emit a first light beam having a first wavelength, and the wavelength conversion component is used to convert the first light beam into a second light beam having a second wavelength after receiving the excitation of the first light beam; the first wavelength is 400nm-480nm, and the second wavelength is 480nm-650nm. Since in practical applications, people often need to use white light for operations, and the current common practice is to obtain a white light beam by mixing blue light and yellow light. By configuring the excitation light source to emit a first light beam having a first wavelength of 400nm-480nm, and configuring the wavelength conversion component to convert the first wavelength into a second light beam having a second wavelength of 480nm-650nm, the light beam excitation device provided in the embodiment of the present application can meet the conditions for obtaining a white light beam. When a white light beam is needed in actual operations, the first light beam and the second light beam can be mixed more conveniently to obtain a white light beam, which improves the applicability to a certain extent and can meet the color requirements of the light beam in most operating situations.

[0008] In an optional manner, the number of excitation light sources and excitation surfaces is at least one, and each excitation surface is configured to have at least one excitation light source disposed toward it. In actual operation, if the energy of the light beam used for excitation is insufficient, the second light beam obtained after the wavelength conversion of the wavelength conversion component may be difficult to meet the actual operation requirements. Therefore, by providing multiple excitation surfaces and multiple excitation light sources, the number of excitation lights received by the wavelength conversion component can be increased, ensuring that the wavelength conversion component can obtain a second light beam with a light intensity sufficient to meet the operation requirements after being excited.

[0009] In an optional manner, a first beam processing layer is provided on the excitation surface, and the first beam processing layer is used for the first beam to penetrate and for reflecting the second beam. Since the wavelength conversion component has multiple surfaces, the first beam emitted by the excitation light source irradiates the excitation surface to excite the wavelength conversion component. At this time, the wavelength conversion component can be excited by the first beam incident from the excitation surface. Except for the second beam emitted from the light-emitting surface, which can be processed and utilized, the rest of the second beams emitted from the excitation surface are difficult to be processed and utilized normally. By providing the first beam processing layer on the excitation surface, the first beam used for excitation can penetrate the first beam processing layer to excite the wavelength conversion component. The second beam emitted from the excitation surface after the wavelength conversion of the wavelength conversion component is reflected by the first beam processing layer and can only be emitted from the light-emitting surface, so that the intensity of the second beam emitted from the light-emitting surface is reinforced, thereby enhancing the intensity of the beam emitted by the beam excitation device.

[0010] In an optional manner, a second light beam processing layer is provided on the backlight surface and the side surface that is not configured as the excitation surface, and the second light beam processing layer is used to reflect the first light beam and / or the second light beam. After the second light beam processing layer is provided on the backlight surface of the wavelength conversion component and the side surface that is not configured as the excitation surface, the first light beam used to excite the wavelength conversion component can be reflected by the second light beam processing layer when it is about to penetrate the wavelength conversion component and emit outward before being completely absorbed by the wavelength conversion component, so that the first light beam that is about to penetrate the wavelength conversion component can continue to be used for excitation by the wavelength conversion component. When the wavelength conversion component is excited to emit the second light beam, if the surface from which the second light beam is emitted is not the light-emitting surface, but passes through the backlight surface that is not conducive to the utilization of light or the side surface that is not configured as the excitation surface, it will also be reflected by the second light beam processing layer, so that the second light beam can only be emitted from the light-emitting surface, which is not easy to cause waste of light energy, thereby improving the light utilization rate of the light beam excitation device provided in the embodiment of the present application.

[0011] In an optional manner, the spot area of ​​the first light beam falling on the excitation surface is less than or equal to the area of ​​the excitation surface. Since the wavelength conversion component must be irradiated by the light beam to be effectively excited, if the area covered by the first light beam on the plane where the excitation surface is located exceeds the area of ​​the excitation surface, the part of the light that exceeds the area of ​​the excitation surface will have almost no effect on the excitation of the wavelength conversion component, which will cause a waste of light energy. Therefore, by making the area covered by the first light beam on the plane where the excitation surface is located less than or equal to the area of ​​the excitation surface, the first light beam emitted by the excitation light source can be used to the maximum extent for the excitation of the wavelength conversion component, thereby avoiding a waste of light energy.

[0012] In an optional manner, a heat sink is provided on the side of the second light beam processing layer away from the wavelength conversion component. By providing the heat sink, when the wavelength conversion component is excited by the first light beam emitted by the excitation light source, it is not easy to affect the light quality of the second light beam due to excessive temperature, so that the light beam excitation device provided in the embodiment of the present application has better stability during long-term use.

[0013] In an optional manner, a beam shaping component is provided on the light-exiting side of the excitation halo, and the beam shaping component is configured to shape the first light beam emitted by the excitation light source. By providing the beam shaping component on the light-exiting side of the excitation light source, the first light beam of the excitation light as the wavelength conversion component can be shaped by the beam shaping component, and the operator can adjust the parameters such as the focus and diffusion of the first light beam according to actual needs, thereby improving the applicability of the light beam excitation device provided in the embodiment of the present application.

[0014] According to another aspect of the embodiments of the present application, a light source is provided, comprising a light beam excitation device according to any one of the above embodiments.

[0015] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a light beam excitation device provided in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the backlight structure of a wavelength conversion component in a light beam excitation device provided in an embodiment of the present invention;

[0019] Figure 3 A schematic side view of the structure of a light beam excitation device provided in an embodiment of the present invention;

[0020] Figure 4 A schematic side view of the structure of a light beam excitation device provided in an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of a top view of an arrangement of an excitation light source and a wavelength conversion component in a light beam excitation device provided in an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of a top view of an arrangement of an excitation light source and a wavelength conversion component in a light beam excitation device provided in an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the three-dimensional structure of a light beam excitation device provided in an embodiment of the present invention;

[0024] Figure 8 A schematic diagram of the three-dimensional structure of a light beam excitation device provided in an embodiment of the present invention;

[0025] Fig. 9 A schematic diagram of the exploded structure of a wavelength conversion component in a light beam excitation device provided in an embodiment of the present invention;

[0026] Fig.10 A schematic diagram of the three-dimensional structure of a wavelength conversion component in a light beam excitation device provided in an embodiment of the present invention.

[0027] The reference numerals in the specific implementation manner are as follows:

[0028] 100. Light beam excitation device;

[0029] 110. Base;

[0030] 120, an excitation light source, 121, a first light beam;

[0031] 130. wavelength conversion component, 131. light emitting surface, 132. backlight surface, 133. side surface, 134. excitation surface, 135. first light beam processing layer, 136. second light beam processing layer, 137. heat sink. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0034] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0037] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0038] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do 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 should not be understood as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] In the drawings, dashed arrows are used to indicate the irradiation direction of light.

[0041] With the advancement of modern science and technology, light plays an important role in people's production and life. People not only rely on light for lighting, but can also meet different work needs by using different types of light. It is now a more common way to use light to convert the wavelength of light emitted by the light source through wavelength conversion components to obtain a light beam that meets the work needs.

[0042] In practical applications, people often use a reflective excitation method, which means that the excitation surface and the light emitting surface are located on the same surface of the wavelength conversion component.

[0043] The inventor of the present application noticed that when a wavelength conversion component is excited by a reflective method, since the side of the wavelength conversion component that receives the excitation light is the same side as the side from which the light beam obtained after the wavelength conversion is emitted, the excitation light is often affected by the mirror reflection of the surface of the wavelength conversion component, reflecting a portion of the excitation light so that the reflected excitation light and the light beam obtained after the wavelength conversion are emitted in the same direction, and thus a portion of the excitation light is mixed in the light beam obtained by the reflective excitation device through the excitation of the wavelength conversion component, affecting the purity of the light beam and being detrimental to the operation. If the wavelength conversion component is used for the processing, it may be necessary to install additional shielding parts, which makes the overall device more complicated, and the installed shielding parts are also easy to block the wavelength-converted light beam that can be used. At the same time, due to the reflective excitation method, the incident surface of the excitation light and the exit surface of the light beam after wavelength conversion are the same surface, therefore, the optical device for emitting the excitation light often needs to be located on the same surface of the light exit surface of the wavelength conversion component, and the optical device emitting the excitation light is also easy to block the light beam after wavelength conversion, so that the portion of the light beam emitted after wavelength conversion that can be used is only about 75%, which greatly affects the utilization rate of light.

[0044] In order to solve the above technical problems, the inventors of the present application have designed a light beam excitation device after research. By setting a relative light-emitting surface and a backlight surface and an excitation surface adjacent to the edges of the light-emitting surface and the backlight surface on the wavelength conversion component, the excitation light emitted by the excitation light source is irradiated on the excitation surface of the wavelength conversion component to excite the wavelength conversion component, and the light emitted from the light-emitting surface after the wavelength conversion component is excited is utilized, thereby avoiding the problem that the excitation light will contaminate the light emitted by the wavelength conversion component when the surface of the wavelength conversion component that receives the excitation light and emits the light is the same surface, making the light beam obtained by excitation purer, and there is no need to set up additional components to process the excitation light emitted by the light-emitting surface, thereby avoiding blocking of the light beam, improving the utilization rate of light, and ensuring the quality of the light beam.

[0045] According to some embodiments of this application, please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the three-dimensional structure of a light beam excitation device 100 provided in an embodiment of the present invention, Figure 2 FIG. 1 is a schematic structural diagram of the backlight surface 132 of the wavelength conversion component 130 in the light beam excitation device 100 provided in an embodiment of the present invention. Figure 1 and Figure 2 As shown, a light beam excitation device 100 is provided, including: a base 110, a wavelength conversion component 130 and an excitation light source 120, wherein the wavelength conversion component 130 and the excitation light source 120 are both arranged on the base 110; the wavelength conversion component 130 is provided with a light emitting surface 131 and a backlight surface 132 relative to each other, and a plurality of side surfaces 133 are adjacent to the light emitting surface 131 and the backlight surface 132, and at least one side surface 133 is configured as an excitation surface 134; the excitation light source 120 emits a first light beam 121 toward at least one excitation surface 134 to excite the wavelength conversion component 130; the wavelength conversion component 130 is used to convert at least part of the first light beam 121 into a second light beam when excited by the first light beam 121, and the second light beam is emitted from the light emitting surface 131.

[0046] like Figure 1 As shown, the base 110 may be a flat plate-like structure, so that the excitation light source 120 and the wavelength conversion component 130 can be fixed on the base 110. In some cases, the base 110 may have a raised bracket or platform, and the excitation light source 120 and the wavelength conversion component 130 are fixed on these raised brackets or platforms to meet the optical requirements of the light beam excitation device 100 provided in the embodiment of the present application. The base 110 may also be provided with a slot, a buckle or a slide-in fixing structure, and the excitation light source 120 and the wavelength conversion component 130 can be detachably fixed on the base 110 through the above-mentioned fixing structure. When the specifications of the excitation light source 120 or the wavelength conversion component 130 do not meet the operating requirements or fail, they can be easily disassembled and replaced.

[0047] The wavelength conversion component 130 may be a tightly integrated component of a wavelength conversion material of a yttrium aluminum garnet structure doped with at least a rare earth element, or may be a wavelength conversion material of an inorganic matrix doped with at least a rare earth element selected from Ce, Nd, Er, Yb, Ho, Tm, Dy and Sm and combinations thereof, to form a light-emitting material capable of emitting light of a new wavelength after absorbing light energy of a specific wavelength. When the wavelength conversion component 130 is irradiated by the first light beam 121, the wavelength conversion component 130 absorbs the first light beam 121 and emits a second light beam. This process is the working principle of the wavelength conversion component 130. Generally, the wavelength conversion component 130 converts part of the received light beam into a light beam of another wavelength. However, depending on its material composition or structural design, the conversion efficiency of the wavelength conversion component 130 for the first light beam often does not reach 100%, and the unabsorbed part of the first light beam will be emitted together with the converted second light beam. At this time, the two light beams of different wavelengths are mixed and output. For details, please refer to the following embodiments.

[0048] For example, in a certain practical application, white light that can meet the work requirements is needed, so the first light beam 121 is set to blue light. By adjusting the component components of the wavelength conversion component 130 so that after absorbing the blue light, at least part of the blue light of the first light beam 121 can be converted into yellow light of the second light beam. The blue light of the first light beam 121 that is not converted by the wavelength conversion component 130 is scattered in the wavelength conversion component 130, and the yellow light of the second light beam is mixed with the blue light of the first light beam 121 scattered in the wavelength conversion component 130, so that a white light beam is finally obtained, and the white light beam is emitted from the light exit surface. The light beam obtained in the above manner is actually mainly a combined light of the second light beam and the unconverted first light beam 121 after scattering in the wavelength conversion component 130. The difference from the situation where the first light beam 121 leaks from the light outlet mentioned in the technical problem to be solved by the present application is that when the first light beam 121 leaks to the light outlet through mirror reflection or transmission, the first light beam 121 is a light beam with concentrated energy rather than a scattered light beam, and it is difficult to completely mix with the second light beam. In the end, it will visually appear as a white light beam mixed with very obvious blue light, which makes the final light beam color impure and not conducive to use. However, when the first light beam 121 and the second light beam are fully mixed, the final light beam color is relatively pure.

[0049] The excitation light source 120 may be a laser light source or an LED light source, or any light source that can be used to excite the wavelength conversion component 130. In the embodiment of the present application, the excitation light source 120 is taken as a laser light source for illustration.

[0050] By arranging a light-emitting surface 131 and a backlight surface 132 opposite to each other on the wavelength conversion component 130, and configuring at least one of the multiple side surfaces adjacent to the edges of the light-emitting surface 131 and the backlight surface 132 as an excitation surface 134, the excitation light source 120 emits a first light beam 121 toward at least one excitation surface 134 to excite the wavelength conversion component 130 to emit a second light beam emitted from the light-emitting surface, so that the first light beam 121 used to excite the wavelength conversion component 130 will not be reflected by the mirror surface of the light-emitting surface of the wavelength conversion component 130, resulting in a part of the first light beam 121 and the second light beam being emitted in the same direction, thereby ensuring The purity and accuracy of the obtained second light beam. When the part of the first light beam 121 that has not been converted in wavelength by the wavelength conversion component 130 and the second light beam that has been converted are emitted from the light-emitting surface 131 together, the first light beam 121 and the second light beam will mix with each other to obtain a mixed light with uniform color that is beneficial to operation, and the first light beam 121 with higher intensity will not be mixed therein, thereby improving the effect of the light beam excitation device 100 provided in the embodiment of the present application on light beam excitation. There is no need to set up additional processing components to process the excess first light beam 121, thereby avoiding the risk of blocking the light beam and ensuring the light utilization rate.

[0051] According to some embodiments of this application, please refer to Figure 3 , and further refer to Figure 4 , Figure 3 A schematic side view of the structure of the light beam excitation device 100 provided in an embodiment of the present invention, Figure 4 FIG. 1 is a schematic diagram of a side view of a light beam excitation device 100 provided in an embodiment of the present invention. Figure 3 and Figure 4 As shown, the excitation light source 120 is configured to emit a first light beam 121 that is inclined toward the backlight surface 132 , and the smaller angle between the straight line where the optical axis of the first light beam 121 is located and the plane where the light emitting surface 131 is located is greater than or equal to half of the divergence angle of the first light beam 121 .

[0052] like Figure 3 As shown, the diffusion angle of the first light beam 121 emitted by the excitation light source 120 is 2a2. The smaller angle between the straight line where the optical axis of the first light beam 121 is located and the plane where the light emitting surface 131 is located can be obtained by constructing a straight line parallel to the light emitting surface 131, that is, the smaller angle between the straight line where the optical axis of the first light beam 121 is located and the plane where the light emitting surface 131 is located is a1. When a1 is equal to half of the diffusion angle of the first light beam 121, that is, a2, according to the theorem of alternate interior angles, it can be known that the light ray closest to the light emitting surface 131 on the cross section of the first light beam 121 is parallel to the light emitting surface 131, as shown in FIG. Figure 4As shown, when a1 is greater than a2, the excitation light source 120 is tilted toward the backlight surface 132 at a greater angle, so that when the first light beam 121 excites the wavelength conversion component 130, as long as a1 is greater than or equal to a2, it can be ensured that the first light beam 121 will not pass through the light output surface 131 of the wavelength conversion component 130 and be emitted.

[0053] By making the first light beam 121 emitted by the excitation light source 120 tilt toward the backlight surface 132, and the smaller angle between the straight line where the optical axis of the first light beam 121 is located and the plane where the light emitting surface 131 is located is greater than or equal to half of the diffusion angle of the first light beam 121, the light beam excitation device 100 provided in the embodiment of the present application will not have the first light beam 121 tilted toward the light emitting surface 131, that is, it is ensured that the first light beam 121 will not penetrate the wavelength conversion component 130 and be emitted from the light emitting surface 131, so that the light beam excitation device 100 provided in the embodiment of the present application When the device 100 emits the second light beam from the light emitting surface 131, a part of the first light beam 121 that penetrates the light emitting surface 131 will not be mixed in the second light beam, thereby improving the purity of the obtained second light beam. When it is necessary to obtain a mixed light of the first light beam 121 and the second light beam, since the first light beam 121 will not leak out a stronger first light beam 121 from the light outlet due to the mirror reflection of the light emitting surface 131 of the wavelength conversion component 130, the final mixed light of the first light beam 121 and the second light beam can be more uniform and the light beam color can be purer.

[0054] According to some embodiments of the present application, the excitation light source 120 is configured to emit a first light beam 121 having a first wavelength, and the wavelength conversion component 130 is used to convert the first light beam 121 into a second light beam having a second wavelength after receiving the excitation of the first light beam 121; the first wavelength is 400nm-480nm, and the second wavelength is 480nm-650nm.

[0055] Generally, light with a wavelength of 400nm-480nm is blue light, and light with a wavelength of 480nm-650nm is yellow light. That is, in this case, the excitation light source 120 emits blue light, the blue light excites the wavelength conversion component 130, and the wavelength conversion component 130 converts the blue light with a wavelength of 400nm-480nm, so that the second light beam emitted after the conversion is yellow light with a wavelength of 480nm-650nm.

[0056] In one embodiment, the first wavelength is preferably 430nm-470nm.

[0057] Since people often need to use white light to work in practical applications, the current common practice is to obtain a white light beam by mixing blue light and yellow light. By configuring the excitation light source 120 to emit a first light beam 121 with a first wavelength of 400nm-480nm, and configuring the wavelength conversion component 130 to convert the first wavelength into a second light beam with a second wavelength of 480nm-650nm, the light beam excitation device 100 provided in the embodiment of the present application can meet the conditions for obtaining a white light beam. When a white light beam is needed in actual work, the first light beam 121 can be more conveniently mixed with the second light beam to obtain a white light beam, which improves the applicability to a certain extent and can meet the color requirements of the light beam in most working conditions.

[0058] Please refer to Figure 5 and Figure 6 , Figure 5 A schematic diagram of a top view of an arrangement of an excitation light source 120 and a wavelength conversion component 130 in a light beam excitation device 100 provided in an embodiment of the present invention. Figure 6 A schematic diagram of a top view of an arrangement of an excitation light source 120 and a wavelength conversion component 130 in a light beam excitation device 100 provided in an embodiment of the present invention. According to some embodiments of the present application, Figure 5 and Figure 6 As shown, the number of the excitation light source 120 and the excitation surface 134 is at least one, and each excitation surface 134 is configured so that at least one excitation light source 120 is disposed toward it.

[0059] Among them, refer to Figure 5 and Figure 6 The shape formed by the multiple excitation surfaces 134 of the wavelength conversion component 130 in the top view may be a triangle or a quadrilateral. When the intensity of the second light beam required in the actual operation increases, the number of sides of the shape formed by the multiple excitation surfaces 134 of the wavelength conversion component 130 in the top view may increase accordingly, so that each excitation surface 134 can be irradiated by the first light beam 121 emitted by at least one excitation light source 120. Similarly, the multiple excitation surfaces 134 may form a pentagon, hexagon or circular arrangement in the top view, so that the multiple excitation light sources 120 are arranged around the wavelength conversion component 130 and excite the wavelength conversion component 130. It should be noted that when the wavelength conversion component 130 is circular in the top view, it should be understood that it has multiple side surfaces 133 instead of one.

[0060] In actual operation, if the energy of the light beam used for excitation is insufficient, the second light beam obtained after the wavelength conversion by the wavelength conversion component 130 may be difficult to meet the actual operation requirements. Therefore, by setting multiple excitation surfaces 134 and multiple excitation light sources 120, the amount of excitation light received by the wavelength conversion component 130 can be increased, ensuring that the wavelength conversion component 130 can obtain a second light beam with a light intensity sufficient to meet the operation requirements after being excited.

[0061] Please refer to Figure 7 , Figure 7 A schematic diagram of the three-dimensional structure of a light beam excitation device 100 provided in an embodiment of the present invention. According to some embodiments of the present application, Figure 7 As shown, a first light beam processing layer 135 is disposed on the excitation surface 134 , and the first light beam processing layer 135 is used for allowing the first light beam 121 to penetrate, and for reflecting the second light beam.

[0062] Among them, the first beam processing layer 135 can be a coating on the outer surface of the wavelength conversion component 130, or it can be a thin layer close to the outer surface of the wavelength conversion component 130. According to the actual situation of the first beam 121 and the second beam, the functional specifications of the first beam processing layer 135 should also change accordingly. For example, the first beam 121 is a blue light laser, the wavelength conversion component 130 is excited, and the second light beam emitted through the light output surface 131 after wavelength conversion is yellow light. At this time, the first beam processing layer 135 can be a blue-transmitting and yellow-reflecting coating to allow the blue light laser to penetrate, while the converted yellow light is reflected.

[0063] Since the wavelength conversion component 130 has multiple surfaces, the first light beam 121 emitted by the excitation light source 120 irradiates the excitation surface 134 to excite the wavelength conversion component 130. At this time, the wavelength conversion component 130 can be excited by the first light beam 121 incident from the excitation surface 134. Except for the second light beam emitted from the light exit surface 131, which can be processed and utilized, the remaining second light beams emitted from the excitation surface 134 are difficult to be normally processed and utilized. By setting a first light beam processing layer 135 on the excitation surface 134, the first light beam 121 used for excitation can penetrate the first light beam processing layer 135 to excite the wavelength conversion component 130. The second light beam emitted from the excitation surface 134 after wavelength conversion by the wavelength conversion component 130 is reflected by the first light beam processing layer 135 and can only be emitted from the light exit surface 131, so that the intensity of the second light beam emitted from the light exit surface 131 is reinforced, thereby enhancing the intensity of the light beam emitted by the light beam excitation device 100.

[0064] Please refer to Figure 8 and Fig. 9 , Figure 8 A schematic diagram of the three-dimensional structure of a light beam excitation device 100 provided in an embodiment of the present invention, Fig. 9Schematic diagram of the exploded structure of the wavelength conversion component 130 in the light beam excitation device 100 provided in an embodiment of the present invention. According to some embodiments of the present application, such as Figure 8 and Fig. 9 As shown, a second light beam processing layer 136 is disposed on the backlight surface 132 and the side surface 133 that is not configured as the excitation surface 134 , and the second light beam processing layer 136 is used to reflect the first light beam 121 and / or the second light beam.

[0065] The second light beam processing layer 136 refers to an optical component capable of reflecting light, such as a mirror, a mirror reflective coating or the like. Fig. 9 As shown, the second light beam processing layer 136 can be a flat plate structure and is in close contact with the backlight surface 132 of the wavelength conversion component 130. When the excitation light source 120 emits a first light beam to the wavelength conversion component 130, the second light beam processing layer 136 arranged on one side of the backlight surface 132 of the wavelength conversion component 130 can reflect the second light beam passing through the backlight surface 132 into the wavelength conversion component 130, so that this part of the second light beam is finally emitted from the light exit surface 131, thereby improving the utilization rate of the second light beam converted by the wavelength conversion component 130 to a certain extent.

[0066] When the second light beam processing layer 136 is set on the backlight surface 132 of the wavelength conversion component 130 and the side surface 133 that is not configured as the excitation surface 134, the first light beam 121 used to excite the wavelength conversion component 130 can be reflected by the second light beam processing layer 136 when it is about to penetrate the wavelength conversion component 130 and emit outward before being completely absorbed by the wavelength conversion component 130, so that the first light beam 121 that is about to penetrate the wavelength conversion component 130 can continue to be used for excitation by the wavelength conversion component 130. When the wavelength conversion component 130 is excited to emit the second light beam, if the surface from which the second light beam is emitted is not the light emitting surface 131, but passes through the backlight surface 132 that is not conducive to the utilization of light or the side surface 133 that is not configured as the excitation surface 134, it will also be reflected by the second light beam processing layer 136, so that the second light beam can only be emitted from the light emitting surface 131, which is not easy to cause waste of light energy, thereby improving the light utilization rate of the light beam excitation device 100 provided in the embodiment of the present application.

[0067] According to some embodiments of the present application, the spot area of ​​the first light beam 121 falling on the excitation surface 134 is smaller than or equal to the area of ​​the excitation surface 134 .

[0068] Since the wavelength conversion component 130 must be irradiated by a light beam to be effectively excited, if the area covered by the first light beam 121 on the plane where the excitation surface 134 is located exceeds the area of ​​the excitation surface 134, the part of the light that exceeds the area of ​​the excitation surface 134 will actually have almost no effect on the excitation of the wavelength conversion component 130, which will cause a waste of light energy. Therefore, by making the area covered by the first light beam 121 on the plane where the excitation surface 134 is located less than or equal to the area of ​​the excitation surface 134, the first light beam 121 emitted by the excitation light source 120 can be used to the maximum extent for the excitation of the wavelength conversion component 130, thereby avoiding a waste of light energy.

[0069] According to some embodiments of this application, please continue to refer to Figure 8 and Fig. 9 ,like Fig. 9 As shown, a heat sink 137 is disposed on the side of the second light beam processing layer 136 facing away from the wavelength conversion component 130 .

[0070] The heat sink 137 can be made of any material with high thermal conductivity, such as copper. The heat sink 137 can be in a plate shape, and the heat sink 137 can dissipate heat for the wavelength conversion component 130 by virtue of its own good thermal conductivity. It can also be a heat dissipation structure composed of multiple hollow tubes, such as multiple hollow copper tubes arranged on the same plane.

[0071] It can be understood that the function of the heat sink 137 is to dissipate heat for the wavelength conversion component 130. Under the premise of not affecting the heat dissipation effect, the heat sink 137 and the base 110 can be formed in one piece. For example, the base 110 is made of copper with good heat dissipation performance, and a table-like structure that is closely connected to the wavelength conversion component 130 is protruded on the base 110 as the heat sink 137.

[0072] By providing the heat sink 137, when the wavelength conversion component 130 is excited by the first light beam 121 emitted by the excitation light source 120, it is not easy for the light quality of the second light beam to be affected by excessive temperature, so that the light beam excitation device 100 provided in the embodiment of the present application has better stability during long-term use.

[0073] According to some embodiments of the present application, a beam shaping component is disposed on the light-emitting side of the excitation light source 120 , and the beam shaping component is configured to shape the first light beam 121 emitted by the excitation light source 120 .

[0074] Among them, the beam shaping component can be any optical device or a combination of multiple optical devices, such as a lens, an aperture, etc., which is used to adjust the first light beam 121 emitted by the excitation light source 120, such as focusing and diffusion. Technical personnel in this field can use different optical devices as beam shaping components according to actual operational needs.

[0075] By setting a beam shaping component on the light output side of the excitation light source 120, the first light beam 121 of the excitation light serving as the wavelength conversion component 130 can be shaped by the beam shaping component, and the operator can adjust the focusing and diffusion parameters of the first light beam 121 according to actual needs, thereby improving the applicability of the beam excitation device 100 provided in the embodiment of the present application.

[0076] In some embodiments, please refer to Fig.10 , Fig.10 Schematic diagram of the three-dimensional structure of the wavelength conversion component 130 in the light beam excitation device 100 provided in an embodiment of the present invention. Fig.10 As shown, the wavelength conversion component 130 can be configured as a structure in which the area of ​​the light-emitting surface 131 is smaller than the area of ​​the backlight surface 132, so that the size of the light beam emitted by the light-emitting surface 131 is smaller. For example, if a certain operation requires a light beam with a spot size smaller than 0.3 mm, then Fig.10 The structure of the wavelength conversion component 130 shown is the same as or similar to that of the wavelength conversion component 130, so that the area of ​​the light emitting surface 131 of the wavelength conversion component 130 is less than 0.3 mm, and the spot size of the obtained light beam can be limited within 0.3 mm.

[0077] Specifically, for example, Fig.10 In the embodiment, the backlight surface 132 of the wavelength conversion component 130 and the side surface 133 which is not configured as the excitation surface 134 are provided with a second light beam processing layer 136, and the excitation surface 134 is provided with a first light beam processing layer 135. When the excitation light source 120 emits the first light beam 121 to the excitation surface 134, due to the existence of the first light beam processing layer 135, the first light beam 121 can pass through the first light beam processing layer 135 and enter the wavelength conversion component 130 to excite the wavelength conversion component 130. When the wavelength conversion component 130 is excited, the wavelength conversion component 130 converts the wavelength of the first light beam 121 to obtain a second light beam. Since the first light beam processing layer 135 is provided on the excitation surface 134, A beam processing layer 135 is capable of reflecting the second beam so that the second beam cannot be emitted through the excitation surface 134, and the backlight surface 132 and the side surface 133 that is not set as the excitation surface 134 are provided with a second beam processing layer 136, which can also reflect the second beam so that the second beam cannot be emitted through the backlight surface 132 and the side surface 133 that is not set as the excitation surface 134. Therefore, the second beam reflected by the first beam processing layer 135 and the second beam processing layer 136 will both be emitted from the light emitting surface 131. Assuming that the area of ​​the light emitting surface 131 is 0.2 mm, the size of the second beam emitted from the light emitting surface 131 is 0.2 mm.

[0078] In actual situations, the wavelength conversion component 130 often has a certain diffusion effect on the excitation light, that is, the size of the light beam obtained after the wavelength conversion of the incident excitation light often becomes larger, and the larger size is the width of the wavelength conversion component 130. Generally speaking, the width of the common wavelength conversion component 130 is often about 0.15mm. When the size of the excitation light beam used for excitation is 0.3mm, the size of the light beam obtained after the wavelength conversion by the wavelength conversion component 130 will reach about 0.45mm. Although the size of the light beam obtained after the wavelength conversion can be limited by adjusting the size of the light emitting surface 131 of the wavelength conversion component 130, since in the reflective excitation scheme, the light beam used for excitation and the light beam after wavelength conversion are incident and emitted from the same surface, in order to ensure that the light beam used for excitation can be completely irradiated on the wavelength conversion component 130, it is also necessary to control the size of the light beam used for excitation. However, the smaller the size of the light beam used for excitation, the lower the intensity of the wavelength-converted light beam obtained by the wavelength conversion component 130, and the more difficult it is to meet conventional operating needs. Generally speaking, it is difficult to control the size of the wavelength-converted light beam within 0.3 mm.

[0079] In the embodiment of the present application, since the incident surface of the first light beam 121 used as the excitation light beam is not the same surface as the exit surface of the second light beam obtained after wavelength conversion, when the size of the second light beam required for the operation is within 0.3 mm, the size requirement for the first light beam 121 is relatively low, and the area of ​​the excitation surface 134 can even be appropriately enlarged to ensure that the wavelength conversion component can more completely receive the excitation of the first light beam 121, and the area of ​​the light exit surface 131 can be reduced to 0.3 mm. 2 , which means that the size of the second light beam can be limited while ensuring the intensity of the light beam, so that the light beam excitation device provided in the embodiment of the present application can adapt to a wider range of operational needs and improve applicability.

[0080] Those skilled in the art can adjust the area and shape of the light-emitting surface 131 according to actual operational requirements, so that the size and shape of the second light beam obtained by the light beam excitation device 100 provided in the embodiment of the present application can meet the operational requirements. The embodiment of the present application does not specifically limit the area size and shape of the light-emitting surface 131 relative to the backlight surface 132 of the wavelength conversion component 130.

[0081] According to another embodiment of the present application, a light source is provided, comprising the light beam excitation device 100 according to any one of the above embodiments.

[0082] By adopting the light beam excitation device 100 provided in the embodiment of the present application in the light source, the light beam emitted by the light source provided in the embodiment of the present application can be purer, and the emitted light beam will not be mixed with the first light beam 121 used to excite the wavelength conversion component 130, which helps to improve the accuracy of operations using light.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A light beam excitation device, characterized in that: include: A base, a wavelength conversion component and an excitation light source, wherein the wavelength conversion component and the excitation light source are both arranged on the base; The wavelength conversion component is provided with a light-emitting surface and a backlight surface opposite to each other, a plurality of side surfaces are adjacent to the light-emitting surface and the backlight surface, and at least one of the side surfaces is configured as an excitation surface; The excitation light source emits a first light beam toward at least one of the excitation surfaces to excite the wavelength conversion component; The wavelength conversion component is used to convert at least a portion of the first light beam into a second light beam when excited by the first light beam, and the second light beam is emitted from the light emitting surface.

2. The light beam excitation device according to claim 1, characterized in that: The excitation light source is configured to emit the first light beam inclined toward the backlight surface, and the smaller angle between the straight line where the optical axis of the first light beam is located and the plane where the light exit surface is located is greater than or equal to half of the divergence angle of the first light beam.

3. The light beam excitation device according to claim 1, characterized in that: The excitation light source is configured to emit the first light beam having a first wavelength, and the wavelength conversion component is used to convert the first light beam into the second light beam having a second wavelength after being excited by the first light beam; The first wavelength is 400nm-480nm, and the second wavelength is 480nm-650nm.

4. The light beam excitation device according to claim 1, characterized in that: The number of the excitation light source and the excitation surface is at least one, and each excitation surface is configured so that at least one excitation light source is arranged toward it.

5. The light beam excitation device according to any one of claims 1 to 4, characterized in that: A first light beam processing layer is disposed on the excitation surface. The first light beam processing layer is used for allowing the first light beam to penetrate and for reflecting the second light beam.

6. The light beam excitation device according to any one of claims 1 to 4, characterized in that: A second light beam processing layer is disposed on the backlight surface and the side surface not configured as the excitation surface, and the second light beam processing layer is used for reflecting the first light beam and / or the second light beam.

7. The light beam excitation device according to any one of claims 1 to 4, characterized in that: The spot area of ​​the first light beam falling on the excitation surface is smaller than or equal to the area of ​​the excitation surface.

8. The light beam excitation device according to claim 6, characterized in that: A heat sink is disposed on a side of the second light beam processing layer away from the wavelength conversion component.

9. The light beam excitation device according to any one of claims 1 to 4, characterized in that: A beam shaping component is disposed on the light-emitting side of the excitation light source, and the beam shaping component is configured to shape the first light beam emitted by the excitation light source.

10. A light source, characterized in that: It comprises a light beam excitation device as described in any one of claims 1 to 9.

Images