CN110792949A - Light source system and light emitting device - Google Patents
Light source system and light emitting device Download PDFInfo
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- CN110792949A CN110792949A CN201910647068.1A CN201910647068A CN110792949A CN 110792949 A CN110792949 A CN 110792949A CN 201910647068 A CN201910647068 A CN 201910647068A CN 110792949 A CN110792949 A CN 110792949A
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- light
- light source
- conversion element
- source system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
Abstract
The invention provides a light source system and a light emitting device, the light source system comprises: the device comprises a first light source, a light conversion element, a heat dissipation device and a light uniformizing device; wherein the first light source is used for emitting first light; the light conversion element is used for receiving the first light and converting part of the first light into fluorescent light, and the light conversion element is fixed on the first surface of the heat dissipation device; the light source system further comprises a light homogenizing device comprising a polygonal conical rod, and the polygonal conical rod comprises: the polygonal light incident surface is parallel to the light emergent surface of the light conversion element; the light emergent surface is different from the light incident surface in size; and the connecting surface is vertically connected with the light incident surface and the light emergent surface and is fixed on the second surface of the mounting groove. The connecting surface is vertically connected between the light incident surface and the light emergent surface of the dodging device, so that the assembling convenience, the assembling precision, the processing convenience and the production efficiency of the dodging device are improved.
Description
Technical Field
The present invention relates to the field of light source technologies, and in particular, to a light source system and a light emitting device.
Background
This section is intended to provide a background or context to the specific embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
In the technical field of illumination and display, the conical optical integrator rod can be widely applied because the conical optical integrator rod can realize the small angle of light reduction and the improvement of light receiving and shaping efficiency.
However, in the field of micro light source technology, such as a compact optical system, the difficulty of manufacturing a tapered integrating rod increases with the reduction of the whole light source device, and not only is the strength of the raw material in manufacturing hard to withstand the self-weight of the integrating rod in the optical axis direction, but also the optical surface processing after molding is easy to break due to the smaller device.
Moreover, the assembly precision in the technical field of micro light sources is high, and because the general conical optical integration rod is of a symmetrical structure along the optical axis and the sizes of the light incident surface and the light emergent surface are different, namely, the side surface between the light incident surface and the light emergent surface is obliquely arranged relative to the optical axis, the assembly difficulty is increased, and the assembly precision is low.
Disclosure of Invention
In order to solve the technical problems of high assembly difficulty and low assembly precision of a conical optical integrating rod in the prior art, the invention provides a light source system which comprises a light homogenizing device with a polygonal conical rod, can effectively reduce the assembly difficulty and improve the assembly precision, and also provides a light emitting device.
A light source system, comprising: the light source comprises a first light source, a light conversion element and a heat dissipation device, wherein the first light source is used for emitting first light; the light conversion element is fixed on the first surface of the heat dissipation device and used for receiving the first light and converting at least part of the first light into fluorescence with a wavelength different from that of the first light or changing the angular distribution of the first light;
the light source system further comprises a light uniformizing device for uniformizing the light emitted by the light conversion element, wherein the light uniformizing device comprises a polygonal conical rod, and the polygonal conical rod comprises:
the polygonal light incident surface is parallel to the light emergent surface of the light conversion element;
the light emergent surface is different from the light incident surface in size; and
and the connecting surface is vertically connected with the connecting surface between the light incident surface and the light emergent surface and is fixed on the second surface of the heat dissipation device.
Furthermore, a reflecting cup is further arranged between the first light source and the light conversion element, first light emitted by the first light source passes through the reflecting cup and irradiates the light conversion element, and light rays emitted by the light conversion element pass through the light incident surface after being reflected by the reflecting cup and enter the light uniformizing device.
Further, the optical axis of the reflection cup is located between the optical conversion element and the optical axis of the light uniformizing device.
Furthermore, the heat dissipation device is internally provided with a mounting groove for mounting the light uniformizing device, two opposite side walls of the mounting groove are respectively provided with a supporting piece and an elastic piece, the light uniformizing device comprises a side surface arranged opposite to the connecting surface, and the connecting surface and the side surface are respectively abutted and fixed with the two side walls through the supporting piece and the elastic piece.
Further, the light conversion element is a fluorescent sheet, and the size of the light incident surface of the fluorescent sheet is smaller than that of the light incident surface of the light uniformizing device.
Further, the light source system further comprises a shaping lens, the shaping lens is arranged corresponding to the light emitting surface of the light uniformizing device so as to shape the light emitted by the light uniformizing device and emit the light, and the optical axis of the shaping lens is located between the optical axis of the light incident surface and the optical axis of the light emitting surface of the light uniformizing device.
Further, the optical axis of the shaping lens is parallel to the connecting surface.
Furthermore, the size of the light incident surface of the light homogenizing device is smaller than that of the light emergent surface of the light homogenizing device.
Further, the air conditioner is provided with a fan,
the size of the light incident surface of the light homogenizing device is 0.3-1mm, and/or the size of the light emergent surface 162 of the light homogenizing device is 0.5-1.2mm, and/or the length of the connecting surface is 5-40 mm.
Further, a reflection cup is arranged between the first light source and the light conversion element, first light emitted by the first light source passes through the reflection cup and irradiates the light conversion element, light emitted by the light conversion element passes through the light incident surface after being reflected by the reflection cup and enters the light uniformizing device, the outer diameter of the reflection cup is 20-30mm, and/or the size of the light emergent surface of the light conversion element is 0.2-0.7 mm.
Furthermore, the shape of the light emitting surface and the shape of the light incident surface of the light uniformizing device are the same.
Furthermore, the light uniformizing device comprises a light emergent part, the light emergent surface of the polygonal conical rod is mutually connected with the light incident surface of the light emergent part, the outer contours of the light emergent surface of the light emergent part are the same, the light emergent surface of the light emergent part is circular, and light rays incident from the light incident surface of the polygonal conical rod are emergent from the light emergent surface of the light emergent part.
Furthermore, the light-emitting surface of the light-emitting part and the light-emitting surface of the polygonal conical rod have the same clear aperture; or the light-emitting surface of the light-emitting part is tangent to the light-emitting surface of the polygonal conical rod.
A light emitting device comprising a light source system as claimed in any one of the above.
In the dodging device of the light source system, the connecting surface is vertically connected between the light incident surface and the light emergent surface, so that the positioning accuracy of the light incident surface and the light emergent surface of the dodging device can be ensured, and the positioning accuracy of the connecting surface is further improved, thereby being beneficial to improving the assembly convenience, the assembly accuracy, the processing convenience and the production efficiency of the dodging device.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments/modes of the present invention, the drawings needed to be used in the description of the embodiments/modes are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments/modes of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a light source system according to an embodiment of the present invention.
Fig. 2 is a three-view diagram of the light uniformizing device provided by the first embodiment.
Fig. 3 is a schematic view of a horizontal mold of the light unifying device array shown in fig. 2.
Fig. 4 is a side view of a horizontal mold of the light unifying device array shown in fig. 3.
Fig. 5 is a schematic view of a far field angle cloth of a light source system using the light uniformizing apparatus shown in fig. 2.
Fig. 6 is a diagram illustrating a far-field illuminance distribution of a light source system using the light uniformizing apparatus shown in fig. 2.
Fig. 7 is a schematic diagram of a far-field CIE color gamut spatial color coordinate distribution of a light source system using the light unifying apparatus shown in fig. 2.
Fig. 8 is a three-view diagram of a light unifying apparatus provided in the second embodiment.
Fig. 9 is a diagram illustrating a far-field illuminance distribution of a light source system using the light uniformizing apparatus shown in fig. 8.
Fig. 10 is a schematic diagram of a far-field CIE color gamut spatial color coordinate distribution of a light source system employing the light unifying apparatus shown in fig. 8.
Description of the main elements
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100 |
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110 |
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130 |
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140 |
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150 |
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153 |
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154 |
| Light uniformizing |
160、260 |
| Polygonal conical rod | 260a |
| Light emitting part | 260b |
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161 |
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162、 |
| Connecting surface | |
| 163、263 | |
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164 |
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170 |
| Upper die | 710 |
| Lower die | 720 |
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730 |
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Fig. 1 is a schematic structural diagram of a light source system according to an embodiment of the present invention. The light source system 100 provided by the invention can be applied to a light-emitting device, such as a portable light source, a common household lighting source and other lighting equipment.
The light source system 100 includes: the first light source 110, the light conversion element 140, the heat sink 150 and the light uniformizing device 160. The first light source 110 is configured to emit a first light. The light conversion element 140 is fixed on the first surface of the heat sink 150, and is configured to receive the first light and convert at least a portion of the first light into fluorescent light (or referred to as stimulated light) having a wavelength different from that of the first light or change an angular distribution of the first light. The light homogenizing device 160 for homogenizing the light emitted from the light conversion element 140 is fixed on the second surface of the heat sink 150.
Specifically, the first light source 110 may be a blue light source emitting blue first light. It is understood that the first light source 110 is not limited to the blue light source, and the first light source 110 may be a violet light source, a red light source, a green light source, or the like. In this embodiment, the light emitter in the first light source 110 is a blue laser, and emits blue laser light as the first light. It is understood that one, two or an array of blue lasers are disposed in the first light source 110, and the number of the lasers can be selected according to actual needs.
In one embodiment, the first light source 110 further includes a light uniformizing device for uniformizing the first light and then emitting the first light to the light conversion element 140. The light homogenizing device can be a fly eye lens or an optical integrating rod. It is to be understood that this feature is not essential, and particularly in a miniaturized light source device, due to the short propagation distance, the exit light of the first light source is collimated and directly enters the light conversion element 140.
In the present embodiment, the light conversion element 140 is a fluorescent sheet or a fluorescent layer disposed on the surface of the heat sink 150. In this embodiment, the light conversion element 140 is a reflective fluorescent sheet/layer, and a reflective structure is provided on a side thereof away from the incident surface. In the present invention, the reflective structure may be a metal reflective layer/film, or may be another reflective layer such as a diffuse reflective layer. The fluorescent sheet/layer absorbs at least a portion of the first light and emits fluorescent light having a wavelength distribution different from that of the first light. The fluorescent sheet/layer can be fluorescent silica gel, fluorescent glass or fluorescent ceramic.
In the present invention, the fluorescent silica gel is an organic phosphor layer in which the phosphor is bonded and layered by an organic adhesive such as silica gel/resin, and is not limited to the use of silica gel as the adhesive. The fluorescent glass is an inorganic fluorescent powder layer formed by softening glass powder and then bonding fluorescent powder. Wherein, silica gel, resin and glass powder are used as the adhesive. The fluorescent ceramic is, for example, a pure phase fluorescent ceramic or a complex phase fluorescent ceramic. The pure-phase fluorescent ceramic can be various oxide ceramics, nitride ceramics or oxynitride ceramics, and a luminescent center is formed by doping a trace of activator elements (such as lanthanide) in the preparation process of the ceramic. Because the doping amount of the activator element is generally small (generally less than 1%), the fluorescent ceramic is generally transparent or semitransparent luminescent ceramic. Generally, the pure-phase fluorescent ceramic is of a polycrystalline structure, the fluorescent sheet can also be a fluorescent single crystal, and the fluorescent single crystal has better light transmission performance, is generally colored and transparent and has high thermal conductivity. The complex phase fluorescent ceramic takes transparent/semitransparent ceramic as a matrix, and fluorescent ceramic particles (such as fluorescent powder particles) are distributed in the ceramic matrix. The transparent/translucent ceramic matrix can be a variety of oxide ceramics (e.g., alumina ceramics, Y)3Al5O12Ceramics), nitride ceramics (such as aluminum nitride ceramics) or oxynitride ceramics, the ceramic matrix is used for conducting light and heat, so that exciting light can be incident on the fluorescent ceramic particles, and excited light can be emitted from the complex phase fluorescent ceramics; the fluorescent ceramic particles assume the main light emitting function of the fluorescent ceramic for absorbing the excitation light and converting it into stimulated light. Grains of fluorescent ceramic particlesThe particle size is large, and the doping amount of the activator element is large (such as 1-5%), so that the luminous efficiency is high; and the fluorescent ceramic particles are dispersed in the ceramic substrate, so that the condition that the fluorescent ceramic particles positioned at the deeper position of the fluorescent ceramic cannot be irradiated by exciting light is avoided, and the condition that the concentration of an activator element is poisoned due to the large integral doping amount of the pure-phase fluorescent ceramic is also avoided, thereby improving the luminous efficiency of the fluorescent ceramic. Scattering particles can be further added in each fluorescent sheet/layer, so that the scattering particles are distributed in the fluorescent sheets/layers. The scattering particles are used for enhancing the scattering of the exciting light in the luminescent ceramic layer, so that the optical path of the exciting light in the wavelength conversion layer is increased, the light utilization rate of the exciting light is greatly improved, and the light conversion efficiency is improved. The scattering particles may be scattering particles such as alumina, yttria, zirconia, lanthana, titania, zinc oxide, barium sulfate, etc., and may be scattering particles of a single material, or a combination of two or more kinds, and the scattering particles are characterized by apparent white color, ability to scatter visible light, and stable material, ability to withstand high temperature, and particle size and wavelength of excitation light in an order of magnitude. The scattering particles can also be replaced by air holes with the same size, and the total reflection is realized by utilizing the refractive index difference between the air holes and the matrix or the adhesive, so that the light is scattered. The fluorescent ceramic may also be another composite ceramic layer that differs from the above-described complex phase fluorescent ceramic only in the ceramic matrix. The ceramic matrix is pure-phase fluorescent ceramic, namely the ceramic matrix is provided with an activator and can emit stimulated light under the irradiation of exciting light. The technical scheme integrates the advantages of high luminous efficiency of the luminescent ceramic particles of the complex phase fluorescent ceramic and the advantages of luminous performance of the pure phase fluorescent ceramic, and utilizes the luminescent ceramic particles and the fluorescent ceramic matrix to emit light, so that the luminous efficiency is further improved. In the wavelength conversion layer, scattering particles or pores can be added as well to enhance internal scattering. The light-emitting material (e.g., phosphor) of the phosphor sheet/layer is not limited to a single material, but may be a single materialThe combination of multiple materials can be realized, and the superposition combination of multiple material layers can also be realized. The volume distribution of the luminescence centers in the wavelength conversion layer is not limited to a uniform distribution, and may be a non-uniform distribution such as a gradient distribution.
In another embodiment, the light conversion element 140 may be replaced with a scattering element. The diffusion member is used to change the light distribution of the first light, thereby eliminating the coherence of the first light, and preferably, the diffusion member may be a diffusion sheet, such as an alumina diffuse reflection sheet, to convert the first light incident to the light conversion member 140 into light having a lambertian distribution. When the first light source is an RGB three-color laser light source, the laser can be subjected to decoherence under the action of the light conversion element of the scattering element, and a uniform and speckle-free white illumination light beam is obtained. When the first light source is a monochromatic pure laser light source, the laser can be subjected to decoherence under the action of the light conversion element of the scattering element, and a uniform and speckle-free monochromatic illumination light beam is obtained.
The heat sink 150 includes a heat source heat conducting portion and a heat dissipating fin thermally connected to each other, and the heat dissipating fin is disposed on a side of the heat source heat conducting portion away from the light conversion element. The heat source heat conducting part is thermally connected with the heat source, and heat generated by the heat source is transferred to the air through the heat source heat conducting part and the radiating fins in sequence. In the present embodiment, the heat source heat conducting portion is a heat sink, the heat source is the light conversion element 140, and the first light is continuously irradiated on the predetermined region on the light conversion element 140 to generate the illumination light, which causes the light conversion element 140 to generate heat and generate more heat. Preferably, the heat source heat-conducting portion is a metal heat sink having excellent heat dissipation performance, and the metal heat sink also serves to prevent light on one side of the light conversion element 140 from being transmitted to the shaping lens 170 through the heat dissipation device 150. In this embodiment, the heat sink 150 includes a first surface for mounting the light conversion element 140 and a second surface for mounting the light uniformizing device 160. Specifically, the heat sink 150 is provided with a mounting groove therein, the light uniformizing device 160 is provided inside the mounting groove, the second surface is a sidewall of the mounting groove, and the first surface is adjacent to the second surface. In one embodiment, the heat sink 150 is not provided with a mounting groove, and the heat sink 150 and the light blocking element are respectively disposed on two sides of the light uniforming device 160. In one embodiment, the first surface is spaced apart from the second surface.
Further, a reflective cup 130 is disposed between the first light source 110 and the light conversion element 140, the first light emitted from the first light source 110 passes through the reflective cup 130 and irradiates the light conversion element 140, and the fluorescent light emitted from the light conversion element 140 enters the light uniformizing device 160 after being reflected by the reflective cup 130.
As shown in fig. 1, the opening of the reflective cup 130 faces the light conversion element 140, the bottom of the reflective cup 130 faces the first light source 110, the reflective material is disposed on the inner wall of the reflective cup 130, the bottom is disposed with a light incident hole deviating from the optical axis thereof, and the first light passes through the light incident hole and irradiates the light conversion element 140. Most of the fluorescence is reflected by the reflective cup 130 and then incident on the light uniformizing device 160. In one embodiment, a portion of the fluorescent light leaks from the bottom of the reflective cup 130 toward the first light source 110 through the light inlet hole, and the size of the light inlet hole is equivalent to the size of the first light beam, so as to reduce the probability of the fluorescent light exiting from the light inlet hole, thereby improving the light efficiency. In one embodiment, an optical film, such as a spectral filter, is disposed in the light inlet of the reflective cup 130 to transmit the first light reflection fluorescence. In a preferred embodiment, the reflector cup 130 has an outer diameter of 20 to 30 mm. It is understood that, in alternative embodiments, other guiding devices (such as a mirror, a beam splitting filter, a converging lens, a relay lens, etc.) known in the art may be used instead of the reflecting cup 130 to guide the light emitted from the light conversion element 140 to the light uniformizing device 160.
Referring to fig. 2 in conjunction with fig. 1, fig. 2 is a three-dimensional view of a light uniformizing device 160 according to a first embodiment. The light unifying means 160 may be a solid structure or a hollow structure. In the embodiment of the present invention, the light uniformizing device 160 is a polygonal conical rod. Specifically, the light uniformizing device 160 includes a light incident surface 161, a light emitting surface 162 and a plurality of side surfaces connected between the light incident surface 161 and the light emitting surface 162. Further, the light incident surface 161 is polygonal, and the light emitting surface 162 is disposed opposite to the light incident surface 161. In the embodiment of the invention, the light incident surface 161 is parallel to the light emitting surface of the light conversion device 140, so as to prevent the light emitted from the light uniformizing device 160 from deviating from the main optical axis of the light source system 100, which is beneficial to simplifying the arrangement of the internal components of the light source system 10.
The size of the light emitting surface 162 of the light uniformizing device 160 is larger than that of the light incident surface 161, which is beneficial to reducing the light emitting angle and improving the light receiving and shaping efficiency. In the present embodiment, the light emitting surface 162 and the light incident surface 161 have the same shape and are both square. For the micro-sized light uniforming device 160, the aspect ratio of the light uniforming device 160 is larger than 10 to obtain the desired light uniforming effect. The aspect ratio is the ratio of the longest diameter passing through the interior of the light homogenizer 160 to the longest diameter perpendicular thereto. Preferably, the size of the light incident surface 161 is 0.3-1mm, the size of the light emergent surface 162 is 0.5-1.2mm, and the length of the connecting surface 163 is 5-40 mm. Wherein, the sizes are all side lengths. It is understood that the light incident surface 161 and the light emitting surface 162 may be any shape of a circle, a triangle, a bar, or other regular or irregular polygon, but not limited thereto, and in the embodiment where the light incident surface 161 and the light emitting surface 162 are any shapes, the "size" refers to a diameter of a maximum inscribed circle or a minimum circumscribed circle of the light incident surface 161 and the light emitting surface 162.
Referring to fig. 3-4, fig. 3 is a schematic diagram of a horizontal mold for the array of light unifying devices 160 shown in fig. 2, and fig. 4 is a side view of the horizontal mold for the array of light unifying devices 160 shown in fig. 3. The processing mode of the casting mould can ensure the demoulding precision and the surface smoothness of the mould, and can obtain a large amount of micro uniform light devices 160 at one time in an array mode and obtain more ideal smooth surface characteristics. The casting mold is subjected to the processes of grouting, curing, demolding and polishing, and a support or a grouting opening is needed to improve the forming efficiency. After the molding is completed, the support is subtracted by mechanical thinning, polishing to obtain the desired optical properties.
However, for a tapered optical integrator rod with a small size (less than 1mm) of the light incident surface and the light emergent surface and an aspect ratio of more than 10, there are many technical challenges, and generally, three methods can be adopted for casting:
firstly, a vertical casting mode can be adopted, namely the light-emitting surface of the tapered optical integrator rod and the supporting plane are horizontally arranged. This casting mode presents demolding difficulties; when the mold is used for small-size casting, the material shrinkage or other stress problems in the grouting forming process can easily cause the collapse of the tapered optical integrating rod; when the support is thinned, the conical optical integrator rod is also prone to fracture due to non-uniformity of mechanical pressure.
The common cone-shaped optical integrator rod has the coaxial characteristic that the geometric central axes of the light incident surface and the light emergent surface are consistent. The coaxial conical optical integrator rod can solve the technical problems of the vertical casting mode through the transverse array casting mode. The transverse casting mold means that one side surface of the coaxial conical optical integrator rod is kept horizontal with the supporting plane when casting. However, the transverse casting mold can cause the problem of demolding interference at the light inlet end of the coaxial conical optical integrator rod.
If the horizontal casting method is adopted, that is, the optical axis of the coaxial tapered rod is kept horizontal, the horizontal casting method has a problem that the bottom surface thinning step of the adjacent support plane molding cannot be performed in an array manner or can be performed in a single row.
As shown in fig. 2 and 4, the side surfaces connected between the light incident surface 161 and the light emitting surface 162 include a connection surface 163 and a side surface 164 opposite to the connection surface 163, and the connection surface 163 is vertically connected between the light incident surface 161 and the light emitting surface 162. The cross section of the light uniforming device 160 along the optical axis thereof and perpendicular to the connecting surface 163 has a right trapezoid shape.
As shown in fig. 3-4, the upper mold 710, the lower mold 720 and the supporting member 730 are used in the molding process, wherein the supporting member 730 is embedded between the lower mold 720 and the upper mold 710, the light homogenizing device 160 is formed between the supporting member 730 and the upper mold 710, and the connecting surface 163 of the light homogenizing device 160 is parallel to the surface of the supporting member 730. The upper and lower die opening mode can be adopted to obtain a more ideal optical element surface, and is beneficial to maintaining the support member 730 and the grouting opening during demoulding. After demolding, the upper mold 710 may be wax sealed to maintain the overall flatness and fixed, and then the light homogenizing devices 160 may be thinned from bottom to top until the support member 730 is removed, and finally polished to obtain a plurality of light homogenizing devices 160.
The connecting surface 163 of the light uniformizing device 160 is formed on the surface of the support 730, and the cross section of the light uniformizing device 160 along the optical axis thereof and perpendicular to the connecting surface 163 is in a right trapezoid shape, so that the demolding interference of the light uniformizing device 160 is avoided, and the array thinning of the light uniformizing device 160 array can be further performed, which is beneficial to improving the processing convenience and the production efficiency of the light uniformizing device 160.
Further, referring to fig. 1 in combination with fig. 2, in the present embodiment, the heat dissipation device 150 is provided with a mounting groove, the light uniforming device 160 is fixed in the mounting groove in the heat dissipation device 150, two opposite sidewalls of the mounting groove are respectively provided with the abutting member 153 and the elastic member 154, and the connection surface 163 and the side surface 164 are respectively abutted and fixed with the two sidewalls through the abutting member 153 and the elastic member 154. In the embodiment where the heat sink 150 and the light blocking element are respectively disposed on both sides of the light uniformizing device 160, the connection surface 163 may be fixed to the second surface by two fixing members.
The connecting surface 163 is vertically connected between the light incident surface 161 and the light emitting surface 162, so that the positioning accuracy of the light incident surface 161 and the light emitting surface 162 of the light uniformizing device 160 can be ensured, the positioning accuracy of the connecting surface 163 is further improved, and the assembling convenience, the assembling accuracy, the processing convenience and the production efficiency of the light uniformizing device 160 are improved.
Referring to fig. 5-7, fig. 5 is a schematic diagram of a far-field angle distribution of the light source system 100 using the light uniforming device 160 shown in fig. 2, fig. 6 is a schematic diagram of a far-field illuminance distribution of the light source system 100 using the light uniforming device 160 shown in fig. 2, and fig. 7 is a schematic diagram of a far-field CIE color space color coordinate distribution of the light source system 100 using the light uniforming device 160 shown in fig. 2. As shown in fig. 5, the light uniformizing device 160 adjusts the exit angle of the incident fluorescence (lambertian distribution), and the exit angle of most of the fluorescence is compressed to ± 1.5 degrees, so as to facilitate the subsequent light collection and shaping, and to improve the system light efficiency. In addition, as shown in fig. 6-7, the light uniformizing device 160 has a good effect of uniformizing the color and the illuminance of the light. Specifically, the light emitted from the square light-emitting surface of the light uniformizing device 160 forms a corresponding square light spot in the far field, and the illuminance of the light spot is concentrated to 25-35 Lux; the color coordinates of the square light spots are intensively distributed near (0.4 ), and the illumination light obtained by mixing the three primary colors is close to white.
Referring to fig. 1, the light source system 100 further includes a shaping lens 170 disposed corresponding to the light emitting surface 162 (fig. 2) of the light uniformizing device 160 for shaping the light emitted from the light uniformizing device 160 and then emitting the shaped light. It is understood that other optical elements commonly used in the art may be included in the light source system 100, and are not described in detail herein.
The size of the light incident surface of the light conversion element 140 is smaller than the size of the light incident surface 161 (fig. 2) of the light uniformizing device 160, so that a greater proportion of the fluorescence emitted from the light conversion element 140 is reflected back to the light uniformizing device 160, thereby reducing the light energy loss. In one embodiment, the size of the light incident surface of the light conversion element 140 ranges from 0.2 mm to 0.7 mm.
In the light source system 100, the optical axis of the reflective cup 130 is located between the optical axes of the light conversion element 140 and the light uniformizing device 160, and the optical axis of the shaping lens 170 is located between the geometric centers of the light incident surface 161 and the light emergent surface 162a of the light uniformizing device 160, so as to correct the position and shape of the light emergent spots of the light source system 100, and the maximum brightness position of the emergent light of the light source system is located on the main optical axis of the emergent light.
Referring to fig. 8, there is provided a three-dimensional view of a light uniformizing apparatus 260 according to a second embodiment. The light unifying device 260 differs from the light unifying device 160 mainly in that the light unifying device 260 includes a polygonal conical rod 260a and a light emergent portion 260b connected to each other. In one embodiment, the light homogenizing device 260 is an integrally formed structure. It is understood that in other embodiments, the polygonal conical rod 260a and the light emergent portion 260b are respectively molded and then fixedly connected to a single body. The light-emitting surface of the polygonal conical rod 260a and the light-entering surface of the light-emitting portion 260b are connected with each other and have the same outer profile, the light-emitting surface 262b of the light-emitting portion 260b is the light-emitting surface of the light uniformizing device 260 and is circular, and the light-entering surface of the polygonal conical rod 260a is the light-entering surface of the light uniformizing device 260. The size of the light exit surface 262b refers to the maximum inscribed circle diameter of the light exit surface 262 b.
In the present embodiment, the light emitting surface 262b of the light emitting part 260b is circular, so that the light spots of the light emitted from the light source system 100 are circular light spots, which meets the illumination requirement of a general illumination light source. The polygonal pyramid rod 260a in the present embodiment has the same structure and function as the dodging device 160 in the first embodiment. Within the scope of the spirit or essential features of the present invention, each embodiment of the light uniforming device 160 applied to the first embodiment can be correspondingly applied to the polygonal conical rods 260a of the second embodiment, and for brevity and repetition avoidance, the detailed description thereof is omitted here.
In this embodiment, the light-emitting surface 262b of the light-emitting portion 260b and the light-emitting surface of the polygonal conical rod 260a have the same light-emitting aperture, that is, the diameter of the light-emitting surface 262b of the light-emitting portion 260b is equal to the length of the side of the light-emitting surface of the polygonal conical rod 260 a. In one embodiment, the light-emitting surface 262b of the light-emitting portion 260b is tangent to the connection surface 263, so that the connection surface 263 is vertically connected between the light-emitting surface 262b and the light-incident surface of the polygonal conical rod 260a, thereby ensuring the positioning accuracy of the light-incident surface and the light-emitting surface of the light uniformizing device 260, improving the positioning accuracy of the connection surface 263, and facilitating the improvement of the assembly convenience, the assembly accuracy, the processing convenience and the production efficiency of the light uniformizing device 160.
Referring to fig. 9-10, fig. 9 is a diagram illustrating a far-field illuminance distribution of the light source system 100 using the light uniforming device 260 shown in fig. 8, and fig. 10 is a diagram illustrating a far-field CIE color space color coordinate distribution of the light source system 100 using the light uniforming device 260 shown in fig. 8. The light uniformizing device 260 has a good uniformizing effect on the color and the illumination of the light. Specifically, a circular light emitting surface of the light uniformizing device 260 forms a corresponding circular light spot in a far field, and the illuminance of the light spot is concentrated in 25-35 Lux; the color coordinates in the circular light spots are distributed around (0.4 ) in a centralized way, and the illumination light after mixing the three primary colors is close to white.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several of the means recited in the apparatus claims may also be embodied by one and the same means or system in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (14)
1. A light source system, comprising: the light source comprises a first light source, a light conversion element and a heat dissipation device, wherein the first light source is used for emitting first light; the light conversion element is fixed on the first surface of the heat dissipation device and used for receiving the first light and converting at least part of the first light into fluorescence with a wavelength different from that of the first light or changing the angular distribution of the first light;
characterized in that, the light source system still includes even light device for carrying out even light to the light that light conversion component exited, even light device includes the polygon awl stick, the polygon awl stick includes:
the polygonal light incident surface is parallel to the light emergent surface of the light conversion element;
the light emergent surface is different from the light incident surface in size; and
and the connecting surface is vertically connected with the connecting surface between the light incident surface and the light emergent surface and is fixed on the second surface of the heat dissipation device.
2. The light source system of claim 1, wherein a reflective cup is further disposed between the first light source and the light conversion element, the first light emitted from the first light source passes through the reflective cup and irradiates the light conversion element, and the light emitted from the light conversion element is reflected by the reflective cup and then enters the light uniformizing device through the light incident surface.
3. The light source system of claim 2, wherein the optical axis of the reflector cup is located between the optical axis of the light conversion element and the light unifying means.
4. The light source system of claim 1, wherein the heat sink has a mounting groove for mounting the light homogenizing device, two opposite sidewalls of the mounting groove are respectively provided with a supporting member and an elastic member, the light homogenizing device includes a side surface opposite to the connecting surface, and the connecting surface and the side surface are respectively fixed to the two sidewalls by the supporting member and the elastic member.
5. The light source system of claim 1, wherein the light conversion element is a phosphor sheet having an entrance surface size smaller than an entrance surface size of the light unifying means.
6. The light source system of claim 1, further comprising a shaping lens disposed corresponding to the light exit surface of the light unifying device to shape the light exiting from the light unifying device and exit the light, wherein an optical axis of the shaping lens is located between an optical axis of the light entrance surface and an optical axis of the light exit surface of the light unifying device.
7. The light source system of claim 6, wherein the optical axis of the shaping lens is parallel to the connecting surface.
8. The light source system of claim 1, wherein the size of the light incident surface of the light homogenizing device is smaller than the size of the light emergent surface thereof.
9. The light source system of claim 8, wherein the size of the light incident surface of the light homogenizing device is 0.3-1mm, and/or the size of the light emitting surface 162 of the light homogenizing device is 0.5-1.2mm, and/or the length of the connecting surface is 5-40 mm.
10. The light source system of claim 9, wherein a reflective cup is further disposed between the first light source and the light conversion element, the first light emitted from the first light source passes through the reflective cup and irradiates the light conversion element, the light emitted from the light conversion element passes through the light incident surface after being reflected by the reflective cup and enters the light uniformizing device, an outer diameter of the reflective cup is 20-30mm, and/or a size of a light emergent surface of the light conversion element is 0.2-0.7 mm.
11. The light source system of any one of claims 1-10, wherein the light exit surface and the light incident surface of the light uniformizing device have the same shape.
12. The light source system according to any one of claims 1 to 10, wherein the dodging device comprises a light emergent portion, the light emergent surface of the polygonal conical rod is connected with the light incident surface of the light emergent portion and has the same outer contour, the light emergent surface of the light emergent portion is circular, and the light incident from the light incident surface of the polygonal conical rod is emitted from the light emergent surface of the light emergent portion.
13. The light source system according to claim 12, wherein the light-emitting surface of the light-emitting portion and the light-emitting surface of the polygonal conical rod have the same clear aperture; or the light-emitting surface of the light-emitting part is tangent to the light-emitting surface of the polygonal conical rod.
14. A light-emitting device comprising the light source system according to any one of claims 1 to 13.
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| CN201810860083 | 2018-08-01 | ||
| CN201810860083X | 2018-08-01 |
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| WO (1) | WO2020024610A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114024189A (en) * | 2021-11-18 | 2022-02-08 | 深圳立仪科技有限公司 | Laser excitation broadband linear structure light source |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112129775B (en) * | 2020-09-23 | 2023-03-24 | 哈尔滨工业大学 | Dodging bar-shaped light source and optical element damage detection device based on same |
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| WO2020024610A1 (en) | 2020-02-06 |
| CN110792949B (en) | 2022-05-03 |
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