Light source device and lighting device
By using a cylindrical lens to reshape the light source and a condenser lens to converge the light, the problem of uneven blue laser spot is solved, forming a uniform circular spot suitable for stage lighting and meeting the needs of stage lighting.
Patent Information
- Application Number
- CN202520292413.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-21
AI Technical Summary
The unevenness of the blue laser spot in stage lighting results in inconsistent color and brightness, failing to meet the requirements for a circular spot in stage lighting.
By setting a cylindrical lens to modify the excitation light, the divergence angles of the fast and slow axes of the excitation light are increased or decreased to make them nearly equal, thereby forming a more circular light spot. The light spot is then converged using a condenser lens, combined with a diffuser and a wavelength conversion device, to form a uniform light spot suitable for stage lighting.
It achieves uniformity and circularity of the excitation light spot, making it suitable for stage lighting. It improves the uniformity and brightness of the light spot, meeting the application requirements of stage lighting.
Smart Images
Figure CN223622766U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of light source technology, specifically to a light source device and an illumination device. Background Technology
[0002] With the improvement of efficiency and the reduction of cost of LD laser light sources, the solution of using blue lasers to excite phosphors to obtain white light has been gradually applied in stage applications. Blue lasers have fast and slow axes (x-axis and y-axis). The divergence angle of the fast axis (y-axis) is large, while that of the slow axis (x-axis) is small. The light spot projected onto the phosphor wheel or fixed device is nearly rectangular, while the light spot length of the slow axis (x-axis) is long, and the light spot length of the fast axis (y-axis) is short. The light spot is not circular, but stage lighting applications require a circular light spot, resulting in a highly uneven light spot. Even after the fluorescence diffuses on the phosphor wheel or fixed wheel, the color and brightness of this lighting are still uneven, limiting its application. Utility Model Content
[0003] This application provides a light source device and an illumination device to at least partially improve the above-mentioned technical problems.
[0004] In a first aspect, embodiments of this application provide a light source device, including an excitation light source, a collecting lens, a cylindrical lens, and a condensing lens. The excitation light source is used to emit excitation light, the collecting lens is used to receive and collect the excitation light, the cylindrical lens is used to receive the modified excitation light to increase the divergence angle of the excitation light in the slow axis direction or decrease the divergence angle of the excitation light in the fast axis direction, and the condensing lens is used to converge the excitation light transmitted through the cylindrical lens.
[0005] After the excitation beam is shaped by the cylindrical lens, the focal length fy of the excitation beam along the fast axis and the focal length fx along the slow axis can satisfy the following relationship: 0.5 <fy / fx<1.5。
[0006] In some embodiments, a cylindrical lens is used to receive the modified excitation light and increase the divergence angle of the excitation light in the slow axis direction or decrease the divergence angle of the excitation light in the fast axis direction until the divergence angle of the excitation light in the slow axis direction and the divergence angle of the excitation light in the fast axis direction are equal.
[0007] In some embodiments, the light source device further includes a diffuser disposed in the optical path of the excitation light after being shaped by the cylindrical lens, and located in the optical path between the cylindrical lens and the condenser lens.
[0008] In some embodiments, the excitation light source includes multiple light sources, the collecting lens includes multiple collecting units, and the multiple collecting units are arranged in a one-to-one correspondence with the multiple light sources. The cylindrical lens includes multiple cylindrical units, and the multiple cylindrical units are arranged in a one-to-one correspondence with the multiple light sources.
[0009] In some embodiments, the light source device further includes a wavelength conversion device for receiving the excitation light focused by the condenser lens and converting it into laser light.
[0010] In some implementations, the laser light is reflected by a wavelength conversion device to form illumination light.
[0011] In some embodiments, the light source device further includes a beam splitter and a scattering reflector. The beam splitter receives the excitation light and transmits a portion of the excitation light therethrough, while reflecting the remaining portion of the excitation light. The wavelength conversion device receives the excitation light transmitted through the beam splitter and converts it into laser light, which is then reflected back to the beam splitter and reflected by the beam splitter to a condenser lens. The scattering reflector receives the excitation light reflected by the beam splitter, scatters it, reflects it back to the beam splitter, and then passes through the beam splitter and enters the condenser lens.
[0012] In some embodiments, the light source device further includes a beam splitter and a scattering reflector. The beam splitter receives the excitation light and transmits a portion of the excitation light therethrough, while reflecting the remaining portion of the excitation light. The wavelength conversion device receives the excitation light reflected by the beam splitter and converts it into light that is then reflected back to the beam splitter after being lasered. The light then passes through the beam splitter and enters the condenser lens. The scattering reflector receives the excitation light reflected by the beam splitter, scatters it, reflects it back to the beam splitter, and is then reflected by the beam splitter to the condenser lens.
[0013] Secondly, embodiments of this application also provide a lighting device, including the aforementioned light source device, aperture, and lens. The aperture is used to shape the light emitted from the light source device, and the lens is used to project the shaped light.
[0014] The light source device and lighting device provided in this application embodiment modify the excitation light by setting a cylindrical lens, increasing the angle of the fast axis direction of the excitation light, so that the final light spot is closer to a circular spot, which is suitable for wider application in the lighting field. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of a light source device proposed in an embodiment of this application.
[0017] Figure 2 This is a schematic diagram of another light source device proposed in an embodiment of this application.
[0018] Figure 3This is a schematic diagram of another light source device proposed in an embodiment of this application.
[0019] Figure 4 This is a schematic diagram of another light source device proposed in an embodiment of this application.
[0020] Figure 5 This is a schematic diagram of another light source device proposed in an embodiment of this application.
[0021] Figure 6 This is a schematic diagram of the structure of a lighting device proposed in an embodiment of this application. Detailed Implementation
[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.
[0023] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components; they can refer to mere surface contact; or they can refer to surface contact connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0024] Furthermore, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as referring to specific or particular structures. The terms "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this application, as well as the features of different embodiments or examples.
[0025] With the improvement of efficiency and the reduction of cost of LD laser light sources, the solution of using blue lasers to excite phosphors to obtain white light has been gradually applied in stage applications. Blue lasers have fast and slow axes (x-axis and y-axis). The divergence angle of the fast axis (y-axis) is large, while that of the slow axis (x-axis) is small. The light spot projected onto the phosphor wheel or fixed device is nearly rectangular, not circular, while stage lighting applications require a circular light spot, resulting in a highly uneven light spot. Even after the fluorescence diffuses on the phosphor wheel or fixed device, the color and brightness are still uneven, limiting its use.
[0026] Based on this, the inventors of this application propose a light source device and an illumination device in order to improve the above-mentioned technical problems.
[0027] Example 1
[0028] See Figure 1 This embodiment provides a light source device 20, including an excitation light source 30, a collecting lens 40, a cylindrical lens 50, and a condensing lens 60. The excitation light source 30 is used to emit excitation light, the collecting lens 40 is used to collect the excitation light, the cylindrical lens 50 is used to shape the excitation light, and the condensing lens 60 is used to converge the shaped excitation light to form the required light spot size.
[0029] The excitation light source 30 is used to emit excitation light. The excitation light source 30 can be, for example, a blue light source 31, and more specifically, a blue laser light source 31. Correspondingly, the excitation light can be blue light. There can be one or more excitation light sources 30. In this embodiment, the excitation light source 30 includes multiple light sources 31, each of which can be one or more LEDs. The multiple light sources 31 can be arranged side-by-side or in an array; this embodiment does not limit this arrangement. Specifically, in this embodiment, as an example only, the excitation light source 30 includes three light sources 31, arranged side-by-side. It is understood that in other embodiments, the excitation light source 30 may include only one light source 31 or other numbers of light sources 31.
[0030] The collecting lens 40 is disposed in the optical path from which the excitation light is emitted. The collecting lens 40 is used to receive the excitation light and converge it. Specifically, in this embodiment, the collecting lens 40 includes a plurality of collecting units 41, which are arranged one-to-one with the plurality of light sources 31. Each collecting unit 41 is used to collect and collimate the excitation light emitted from its corresponding light source 31. In this embodiment, the collecting unit 41 can be a lens used to converge the excitation light emitted from the excitation light source 30. In some other embodiments, the number of collecting units 41 can also be other values, which are not limited in this embodiment.
[0031] The cylindrical lens 50 is disposed on the optical path of the laser light emitted after being collected by the collecting lens 40. The cylindrical lens 50 is used to receive the excitation light collected by the collecting lens 40 and modify the divergence angle in the fast axis direction or the slow axis direction of the excitation light, so that the divergence angle in the fast axis direction or the slow axis direction of the excitation light is closer, making the light spot circular or close to circular, which is beneficial to the subsequent application of the excitation light. Here, the divergence angle of the excitation light in the fast axis direction refers to the diffusion angle of the excitation light in the space after being emitted in the fast axis direction, and the divergence angle of the excitation light in the slow axis direction refers to the diffusion angle of the excitation light in the space after being emitted in the slow axis direction.
[0032] The fast axis direction refers to the direction perpendicular to the front surface of the chip of the light source 31, and the slow axis direction refers to the direction parallel to the front surface of the chip of the light source 31.
[0033] Preferably, in some embodiments, after the cylindrical lens 50 modifies the excitation light, the combined focal length fy in the fast axis direction and the combined focal length fx in the slow axis direction of the collecting lens and the cylindrical lens 50 can satisfy the following relationship: 0.5 < fy / fx < 1.5. At this ratio, the divergence angles of the excitation light processed by the cylindrical lens 50 in the fast axis direction and the slow axis direction are moderate and can adapt to various application scenarios.
[0034] In this embodiment, the cylindrical lens 50 is a concave lens, which is used to increase the divergence angle of the excitation light in the slow axis direction, so that the divergence angle of the excitation light in the slow axis direction is increased to be equal to or close to the divergence angle in the fast axis direction. By increasing and modifying the angle of the slow axis direction of the excitation light through the cylindrical lens 50, the light spot can be made closer to circular, which is beneficial to the subsequent application of the excitation light. Here, when the cylindrical lens 50 modifies the angle of the slow axis direction of the excitation light, the angle of the slow axis direction of the excitation light can be modified to be close to the angle of the fast axis direction of the excitation light. For example, the difference between the angle of the slow axis direction of the excitation light and the angle of the fast axis direction of the excitation light can be less than or equal to ±10%.
[0035] Particularly, in a more specific embodiment, when the cylindrical lens 50 modifies the fast axis direction of the excitation light, the angle of the fast axis direction of the excitation light can be modified to be equal to the angle of the slow axis direction of the excitation light, and the formed light spot is a circular light spot, which is convenient for subsequent application to Figure 4 the illumination device 10 shown.
[0036] Specifically in this embodiment, the cylindrical lens 50 includes a plurality of cylindrical units 51. The plurality of cylindrical units 51 are arranged corresponding to the plurality of light sources 31 one by one. At the same time, the plurality of cylindrical units 51 are arranged corresponding to the plurality of collecting units 41 one by one. In this embodiment, each cylindrical unit 51 is concave. When the excitation light is incident on the cylindrical unit 51, it is adjusted and modified by the cylindrical unit 51.
[0037] A condenser lens 60 is disposed in the optical path of the excitation light after it passes through the cylindrical lens 50. The condenser lens 60 is used to converge the excitation light passing through the cylindrical lens 50 to adjust the spot of the excitation light to an appropriate range for use. The excitation light converged by the condenser lens 60 is adjusted to a state suitable for subsequent use and can be used directly or to excite the wavelength conversion device 70 to generate laser light.
[0038] In this embodiment, the light source device 20 further includes a wavelength conversion device 70, which is disposed in the optical path of the excitation light after passing through the condenser lens 60. The wavelength conversion device 70 is used to receive the excitation light focused by the condenser lens 60 and convert it into light that can be transmitted through the laser. In this embodiment, the wavelength conversion device includes a substrate and a wavelength conversion layer disposed on the substrate. The wavelength conversion layer may be composed of phosphor, for example, (Ca,Sr)AlSiN3:Eu. 2+ Phosphors, such as (Ca,Ba)AlSiN3:Eu 2+ Phosphors, and phosphors can also be (Ca,Sr,Ba)AlSiN3:Eu 2+ Phosphors, etc., are not limited to this embodiment. The wavelength conversion device 70 has a transmission structure, and laser light and unconverted excitation light can pass through the wavelength conversion device 70 to form illumination light.
[0039] The light source device 20 provided in this embodiment modifies the excitation light by setting a cylindrical lens 50, increasing the divergence angle of the excitation light in the slow axis direction to be equal to or close to the divergence angle in the fast axis direction, so that the final light spot is closer to a circular spot, which is suitable for wider application in the lighting field, such as in the lighting device 10.
[0040] Example 2
[0041] See Figure 2 This embodiment provides a light source device 20, which differs from the light source device 20 in Embodiment 1 in that the cylindrical lens 50 has a different structure and function. For the same parts, please refer to the content in Embodiment 1. This embodiment does not limit the same parts.
[0042] In this embodiment, the cylindrical lens 50 is a convex lens used to reduce the divergence angle of the excitation light in the fast axis direction, so that the divergence angle of the excitation light in the fast axis direction is reduced to be equal to or close to the divergence angle in the slow axis direction. By reducing and shaping the angle of the excitation light in the fast axis direction by the cylindrical lens 50, the light spot can be made closer to a circle, which is beneficial for subsequent applications of the excitation light. Specifically, when shaping the fast axis direction of the excitation light, the cylindrical lens 50 can shape the angle of the excitation light in the fast axis direction to be close to the angle of the excitation light in the slow axis direction. For example, the difference between the angle of the excitation light in the fast axis direction and the angle in the slow axis direction can be less than or equal to ±10%.
[0043] The cylindrical lens 50 includes multiple cylindrical units 51, each corresponding to one of the multiple light sources 31, and also corresponding to one of the multiple collection units 41. In this embodiment, each cylindrical unit 51 is a convex surface, and when excitation light is incident on a cylindrical unit 51, it is adjusted and shaped by the cylindrical unit 51.
[0044] The light source device 20 provided in this embodiment modifies the excitation light by setting a cylindrical lens 50, reducing the divergence angle of the excitation light in the fast axis direction to be equal to or close to the divergence angle in the slow axis direction, so that the final light spot is closer to a circular spot, which is suitable for wider application in the lighting field, such as in the lighting device 10.
[0045] Example 3
[0046] See Figure 3 This embodiment provides a light source device 20, which differs from the light source devices 20 in Embodiments 1 and 2 in that the light source device 20 also includes a diffuser 80. The same parts can be referred to the contents of Embodiments 1 and 2, and this embodiment does not limit them.
[0047] Specifically, in this embodiment, the light source device 20 further includes a diffuser 80, which is disposed in the optical path of the excitation light after it has been shaped by the cylindrical lens 50. The diffuser 80 can diffuse and homogenize the excitation light, making the excitation light more uniform across the entire light spot. In this embodiment, the diffuser 80 can be disposed in the optical path between the cylindrical lens 50 and the condenser lens 60. In some other embodiments, the diffuser 80 can also be disposed in the optical path after the condenser lens 60; this embodiment does not limit this to that.
[0048] The light source device 20 provided in this embodiment modifies the excitation light by setting a cylindrical lens 50, increasing the divergence angle of the excitation light in the slow axis direction to be equal to or close to the divergence angle in the fast axis direction, so that the final light spot is closer to a circular spot, which is suitable for wider application in the lighting field. At the same time, by setting a diffuser 80, the excitation light can be made more uniform, so that the lighting light formed when it is applied to the lighting device 10 is more uniform.
[0049] Example 4
[0050] See Figure 4 This embodiment provides a light source device 20, which differs from Embodiment 1 in the structure of the wavelength conversion device 70 and the optical path. The following only describes the parts that are different from Embodiment 1, while the same parts can be referred to the foregoing content.
[0051] In this embodiment, the wavelength conversion device is a reflective structure. When the excitation light is incident on the wavelength conversion device, it is converted into a received laser. The received laser is then reflected by the wavelength conversion device and utilized.
[0052] Specifically, in this embodiment, the light source device 20 further includes a beam splitter 90, which can transmit part of the excitation light and reflect the remaining part of the excitation light. The beam splitter 90 is located in the optical path of the excitation light after the cylindrical excitation system. The beam splitter 90 can be, for example, a polarization beam splitter, and can be tilted at 45° relative to the optical axis direction of the excitation light emitted from the cylindrical lens 50.
[0053] The light source device 20 may also include a scattering reflector 100, which is used to scatter and reflect the excitation light. Specifically, in this embodiment, the scattering reflector 100 is disposed in the optical path of the excitation light after it is reflected by the beam splitter 90, and after scattering and reflecting this part of the excitation light, it is reflected back to the beam splitter 90 and enters the condenser lens 60 through the beam splitter 90.
[0054] A wavelength conversion device 70 is positioned in the optical path of the excitation light after it passes through the beam splitter 90. It receives this portion of the excitation light and converts it into a laser beam. The converted laser beam is reflected back to the beam splitter 90 by the wavelength conversion device 70, and then reflected to the condenser lens 60. The condenser lens 60 focuses the beam and emits it, forming a beam of the required spot size.
[0055] The light source device 20 provided in this embodiment modifies the excitation light by setting a cylindrical lens 50, reducing the divergence angle of the excitation light in the fast axis direction to be equal to or close to the divergence angle in the slow axis direction, so that the final light spot is closer to a circular spot, which is suitable for wider application in the lighting field, such as in the lighting device 10.
[0056] Example 5
[0057] See Figure 5 This embodiment provides a light source device 20, which differs from Embodiment 4 in that the wavelength conversion device 70 and the optical path of the scattering and reflecting sheet are different. The following only describes the parts that are different from Embodiment 4, while the same parts can be referred to the foregoing content.
[0058] In this embodiment, specifically, the wavelength conversion device 70 is disposed in the optical path of the excitation light reflected by the beam splitter 90, and receives this part of the excitation light and converts it into laser light. The converted laser light is reflected back to the beam splitter 90 by the wavelength conversion device 70, and then passes through the beam splitter 90 and is incident on the focusing lens 60.
[0059] A scattering reflector 100 is placed in the optical path of the excitation light after it passes through the beam splitter 90. After scattering and reflecting this part of the excitation light, it is reflected back to the beam splitter 90 and then reflected by the beam splitter 90 into the condenser lens 60. The condenser lens 60 focuses the light beam and then emits it to form a light beam of the required spot size.
[0060] The light source device 20 provided in this embodiment modifies the excitation light by setting a cylindrical lens 50, reducing the divergence angle of the excitation light in the fast axis direction to be equal to or close to the divergence angle in the slow axis direction, so that the final light spot is closer to a circular spot, which is suitable for wider application in the lighting field, such as in the lighting device 10.
[0061] Example 6
[0062] See Figure 6 This embodiment provides a lighting device 10, which includes the light source device 20 of any of the above embodiments. Furthermore, the lighting device 10 may also include components such as an aperture stop and a lens. The aperture stop is used to shape the light emitted from the light source device 20, and the lens is used to project the light emitted from the light source device 20, so that the emitted light forms the desired illumination. In other embodiments, the lighting device 10 may also include other components, which are not limited in this embodiment.
[0063] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A light source device, characterized in that, include: An excitation light source, wherein the excitation light source is used to emit excitation light; A collecting lens is used to receive and collect the excitation light; A cylindrical lens, the cylindrical lens being used to receive the modified excitation light, so as to increase the divergence angle of the excitation light in the slow axis direction or decrease the divergence angle of the excitation light in the fast axis direction; as well as A condenser lens, which is used to focus the excitation light transmitted through the cylindrical lens.
2. The light source device according to claim 1, characterized in that, The combined focal length fy of the collecting lens and the cylindrical lens in the fast axis direction, and the combined focal length fx in the slow axis direction, can satisfy the following relationship: 0.5 <fy / fx<1.5。 3. The light source device according to claim 1, characterized in that, The cylindrical lens is used to receive the excitation light collected by the collecting lens, and to increase the divergence angle of the excitation light in the slow axis direction or decrease the divergence angle of the excitation light in the fast axis direction until the divergence angle of the excitation light in the slow axis direction and the divergence angle of the excitation light in the fast axis direction are similar.
4. The light source device according to claim 1, characterized in that, The light source device further includes a diffuser, which is disposed in the optical path of the excitation light after being shaped by the cylindrical lens, and is located between the cylindrical lens and the condenser lens.
5. The light source device according to any one of claims 1-4, characterized in that, The excitation light source includes multiple light sources, the collecting lens includes multiple collecting units, and the multiple collecting units are arranged in a one-to-one correspondence with the multiple light sources. The cylindrical lens includes multiple collecting units, and the multiple collecting units are arranged in a one-to-one correspondence with the multiple light sources.
6. The light source device according to any one of claims 1-4, characterized in that, The light source device further includes a wavelength conversion device, which is used to receive the excitation light focused by the condenser lens and convert it into laser light.
7. The light source device according to claim 6, characterized in that, The laser light is reflected by the wavelength conversion device to form illumination light.
8. The light source device according to claim 7, characterized in that, The light source device further includes a beam splitter and a scattering reflector. The beam splitter receives the excitation light and transmits a portion of the excitation light, while reflecting the remaining portion of the excitation light. The wavelength conversion device receives the excitation light transmitted through the beam splitter, converts it into laser light, reflects it back to the beam splitter, and is reflected by the beam splitter to the condenser lens. The scattering reflector receives the excitation light reflected by the beam splitter, scatters it, reflects it back to the beam splitter, and then passes through the beam splitter before entering the condenser lens.
9. The light source device according to claim 8, characterized in that, The light source device further includes a beam splitter and a scattering reflector. The beam splitter receives the excitation light and transmits a portion of the excitation light through it, while reflecting the remaining portion of the excitation light. The wavelength conversion device receives the excitation light reflected by the beam splitter and converts it into light that is then reflected back to the beam splitter after being laser-received. The light then passes through the beam splitter and enters the condenser lens. The scattering reflector receives the excitation light reflected by the beam splitter, scatters it, and reflects it back to the beam splitter, where it is reflected by the beam splitter to the condenser lens.
10. A lighting device, characterized in that, include: The light source device as described in any one of claims 1-9; Used for emitting illumination light An aperture stop, used to shape the light emitted from the light source device; as well as A lens used to project shaped light.