WO2018196196A1 - 波长转换器件、发光光源和投影设备 - Google Patents

波长转换器件、发光光源和投影设备 Download PDF

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Publication number
WO2018196196A1
WO2018196196A1 PCT/CN2017/094798 CN2017094798W WO2018196196A1 WO 2018196196 A1 WO2018196196 A1 WO 2018196196A1 CN 2017094798 W CN2017094798 W CN 2017094798W WO 2018196196 A1 WO2018196196 A1 WO 2018196196A1
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Prior art keywords
wavelength conversion
conversion device
wavelength
laser
light
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PCT/CN2017/094798
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English (en)
French (fr)
Inventor
田梓峰
胡飞
许颜正
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Publication of WO2018196196A1 publication Critical patent/WO2018196196A1/zh
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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam

Definitions

  • the invention relates to the field of illumination sources, in particular to a wavelength conversion device, an illumination source and a projection device.
  • High-intensity light sources are often used in stage lighting, spotlighting, and digital light projection.
  • the excitation light emitted by the high-intensity light source through the laser is converted into a longer-wavelength laser beam in the wavelength conversion body, thereby emitting high-intensity outgoing light.
  • the excitation light emitted by the existing high-intensity light source is guided to the wavelength conversion body through the optical coupling element.
  • the inventors found that the excitation light entering the wavelength conversion body is not completely converted into laser light, and the unconverted excitation light can be directly emitted from the wavelength conversion body by the laser, thereby causing the laser to be converted by the laser.
  • the efficiency is low and the brightness is not high.
  • the present invention first provides a wavelength conversion device comprising a wavelength conversion body for at least partially converting received excitation light into a laser light, the excitation light being incident from a first end of the wavelength conversion body And receiving the laser light from the second end of the wavelength converting body, further comprising a dichroic color patch perpendicular to an optical axis direction of the wavelength converting body, and disposed at the wavelength conversion The second end of the body.
  • the wavelength converting body is made of a mixed material of YAG:Ce3 and a yellow single crystal or ceramic, and the dichroic film is made of a material that transmits yellow light and reflects blue light, or
  • the wavelength conversion body is made of a mixed material of LuAG:Ce3 and a green single crystal or a transparent ceramic, and the dichroic color sheet is made of a material that transmits green light and reflects blue light.
  • the wavelength conversion device further includes a blue light-modifying sheet perpendicular to an optical axis direction of the wavelength converting body and provided at a first end of the wavelength converting body.
  • At least one side surface of the wavelength conversion body parallel to the optical axis direction of the wavelength conversion body is provided with a reflection film.
  • the reflective film is one or more of a dielectric reflective film, an aluminum reflective film, or a silver reflective film.
  • the wavelength conversion device further includes a plurality of thermally conductive substrates disposed on at least one side of the wavelength conversion body parallel to an optical axis direction of the wavelength conversion body.
  • the material of the thermally conductive substrate is one or more of copper, aluminum alloy, aluminum nitride, silicon carbide, and alumina ceramic.
  • At least one side of the wavelength conversion body parallel to the optical axis direction of the wavelength conversion body is subjected to a polishing process.
  • the outer surface of at least one of the first end portion and the second end portion of the wavelength converting body is provided with an anti-reflection film.
  • the blue light-modifying sheet is plated on the outer side surface of the first end portion, and/or the dichroic color sheet is plated on the outer side surface of the second end portion.
  • the blue light-modifying sheet has an air gap between the first end portion of the wavelength converting body, and/or the dichroic color patch and the second wavelength converting body There is an air gap between the ends.
  • the present invention also provides an illuminating light source comprising a laser, further comprising the above-described wavelength conversion device, the laser being disposed at a first end of the wavelength conversion device.
  • the laser is a blue laser
  • the blue laser is one of a gas laser, a solid laser, and a semiconductor laser.
  • the present invention provides a projection apparatus having the above-described illuminating light source.
  • the wavelength conversion device, the illuminating light source and the projection device provided by the invention provide a dichroic color patch perpendicular to the optical axis direction at the second end of the wavelength converting body, and the dichroic color chip will not be converted.
  • the laser is reflected back into the wavelength conversion body to be recycled again to generate a laser, which improves the light conversion efficiency of the wavelength conversion body.
  • the wavelength conversion device, the illuminating light source and the projection device provided by the invention further reflect the laser light having an exit angle greater than 90° back into the wavelength conversion body by setting a blue light-modifying sheet perpendicular to the optical axis direction at the first end portion, and passing through The reflection film disposed in the direction of the parallel optical axis reflects the laser light of less than 90° back into the wavelength conversion body, thereby improving the light utilization efficiency of the wavelength conversion body.
  • FIG. 1 is a schematic structural view of a wavelength conversion device according to a first embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a wavelength conversion device according to a second embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a wavelength conversion device according to a third embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a wavelength conversion device according to a fourth embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a wavelength conversion device according to a fifth embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of an illuminating light source according to a sixth embodiment of the present invention.
  • Wavelength converter 11
  • Antireflection coating 20
  • Dichroic film 30
  • Excitation light 31
  • First class light 32
  • Residual excitation light 33
  • Second type of light 34
  • Blu-ray modified film 50
  • Reflective film 60
  • Thermally conductive substrate 70 Blue laser
  • an angle between the direction of propagation of the laser light generated by the excitation light entering the wavelength conversion body and the optical axis direction of the wavelength conversion body may be classified into a first type of light, a second type of light, and a third type of light.
  • the propagation direction of the first type of light is parallel to the optical axis direction of the wavelength converting body, and is projected through the second end portion of the wavelength converting body and the dichroic color patch.
  • the angle between the second type of light and the optical axis direction of the wavelength converting body is less than 90°; the angle between the third type of light and the optical axis direction of the wavelength converting body is greater than or equal to 90°.
  • the wavelength conversion device includes a wavelength converting body 10 and a dichroic color patch 20.
  • the wavelength converting body 10 is for at least partially converting the received excitation light 30 into a laser light.
  • the excitation light 30 is incident from the first end of the wavelength conversion body 10, and the received laser light is emitted from the second end of the wavelength conversion body 10.
  • the dichroic sheet 20 is perpendicular to the optical axis direction of the wavelength conversion body 10 and is provided at the second end of the wavelength conversion body 10.
  • the dichroic color patch 20 and the second end of the wavelength conversion body 10 have a distance between the dichroic color patch 20 and the second end of the wavelength conversion body 10. Has an air gap.
  • the material of the wavelength converting body 10 is made of a mixed material of YAG:Ce3 and yellow single crystal or ceramic, and the dichroic color sheet 20 is made of a material that transmits yellow light and reflects blue light.
  • the material of the wavelength converting body 10 may also be made of a mixed material of LuAG:Ce3 and a green single crystal or a transparent ceramic, and the dichroic color film 20 is a material that transmits green light and reflects blue light. production.
  • an outer surface of at least one of the first end portion and the second end portion of the wavelength conversion body 10 is provided with an anti-reflection film 11, preferably at the outer sides of the first end portion and the second end portion. In the film 11, the excitation light 30 enters the wavelength conversion body 10 from the antireflection film 11 at the first end portion, and is projected from the antireflection film 11 at the second end portion, thereby improving the transmittance of the wavelength conversion body 10.
  • the excitation light 30 enters from the first end of the wavelength converting body 10, and most of the excitation light 30 is converted into a laser light in the wavelength converting body 10, and the laser light is incident on the wavelength converting body 30.
  • the optical axis direction is emitted from the second end portion of the wavelength converting body 10 (the first type of light 31 shown in Fig. 1).
  • the dichroic light 30 is reflected back into the wavelength conversion body 10 by the dichroic film 20 (hereinafter referred to as short-term)
  • the second type of light 34) again excites the wavelength converting body 10 to generate a laser.
  • the wavelength conversion device, the illuminating light source, and the projection apparatus provided by the present embodiment provide the unconverted excitation light by the dichroic film 20 by providing the dichroic color patch 20 perpendicular to the optical axis direction at the second end portion of the wavelength conversion body 10.
  • the light is converted back into the wavelength converting body 10 to generate and receive a laser beam, and the light conversion efficiency of the wavelength converting body 10 is improved.
  • FIG. 2 is a schematic structural diagram of a wavelength conversion device according to a second embodiment of the present invention.
  • the main difference between the second embodiment described above and the first embodiment is that the second embodiment adds a blue light-modifying sheet 40.
  • the specific solutions applicable to the first embodiment may also be correspondingly applied to the second embodiment, in order to save space and avoid repetition, here I won't go into details.
  • the wavelength conversion device further includes a blue light-modifying sheet 40 that is perpendicular to the optical axis direction of the wavelength conversion body 10 and is disposed at a first end of the wavelength conversion body 10.
  • the blue light-modifying sheet 40 and the first end of the wavelength conversion body 10 have a certain distance such that the blue light-modifying sheet 40 and the first end of the wavelength conversion body 10 have a Air gap.
  • the third type of light 33 When the third type of light 33 is transmitted from the inside of the wavelength converting body 10 to the first end portion of the wavelength converting body 10, it is reflected by the blue light-modifying sheet 40 back into the wavelength converting body 10, and total reflection occurs in the wavelength converting body 10, and is reflected multiple times. Thereafter, it is finally projected from the second end portion of the wavelength conversion body 10 and the dichroic color patch 20 in order.
  • the third type of light 33 reflected back into the wavelength converting body 10 is totally reflected at the interface between the wavelength converting body 10 and the outside, so that the third type of light 33 reflected back into the wavelength converting body 10 can be Use again.
  • the wavelength conversion device provided by the second embodiment further reflects the above-mentioned third type of light 33 back to the wavelength conversion body through the blue light modification sheet 40 in addition to the technical effects mentioned in the first embodiment. Within 10, after multiple reflections, it is projected from the second end portion and the dichroic color patch 20, thereby improving the light utilization efficiency and the brightness of the light source.
  • FIG. 3 is a schematic structural diagram of a wavelength conversion device according to a third embodiment of the present invention.
  • the main difference between the third embodiment described above and the second embodiment is that the third embodiment adds a reflective film 50.
  • the specific solutions applicable to the second embodiment may also be correspondingly applied to the third embodiment, in order to save space and avoid repetition, here I won't go into details.
  • the wavelength conversion device further includes a reflective film 50 disposed on at least one side of the wavelength conversion body 10 parallel to the optical axis direction of the wavelength conversion body 10, preferably parallel to the wavelength
  • the reflection film 50 is provided on each of the four side faces of the conversion body 10 in the optical axis direction.
  • the reflective film 50 may be one or more of a dielectric reflective film, an aluminum reflective film, or a silver reflective film.
  • the materials of the reflective films 50 on the respective sides may be the same or different, and those skilled in the art may provide them as needed.
  • the wavelength conversion device provided by the third embodiment has a second type of light 34, that is, a direction between a propagation direction and an optical axis direction, in addition to the technical effects mentioned in the second embodiment.
  • Light having an angle of less than 90° is transmitted from the wavelength converting body 10 and the dichroic film 20 by multiple reflections of the reflecting film 50.
  • the third type of light 33 reflected by the blue light-modifying sheet 40 back into the wavelength converting body 10 can also be reflected by the reflecting film 50 multiple times, and transmitted again from the wavelength converting body 10 and the dichroic color sheet 20, thereby effectively improving the light. Utilize efficiency and brightness of the light source.
  • FIG. 4 is a schematic structural diagram of a wavelength conversion device according to a fourth embodiment of the present invention.
  • the main difference between the fourth embodiment described and the third embodiment is that the fourth embodiment adds a thermally conductive substrate 60.
  • the specific solutions applicable to the second embodiment may also be correspondingly applied to the third embodiment, in order to save space and avoid repetition, here I won't go into details.
  • the wavelength conversion device further includes a plurality of thermally conductive substrates 60 disposed on at least one side of the wavelength conversion body 10 parallel to the optical axis direction of the wavelength conversion body 10.
  • the heat conductive substrate 60 may be one, two, three or four, and is provided on the side surface of the wavelength conversion body 10 parallel to the optical axis direction.
  • the wavelength converting body 10 is connected to the heat conductive substrate 60 through the reflective film 50.
  • the material of the thermally conductive substrate 60 is one or more of copper, aluminum alloy, aluminum nitride, silicon carbide, and alumina ceramic.
  • one of the heat conductive substrates 60 is disposed under the wavelength conversion body 10
  • the reflective film 50 is connected below the wavelength converting body 10, but the number of the heat conducting substrates 60 may be plural, that is, the heat conducting substrate 60 is connected to the plurality of reflecting films 50 parallel to the optical axis direction.
  • the wavelength conversion device provided by the fourth embodiment further includes one or more thermally conductive substrates connected to the wavelength conversion body 10 through the reflective film 50 in addition to the technical effects mentioned in the third embodiment. 60, the heat generated by the excitation of the wavelength converting body 10 can be conducted, and thus can be excited by the excitation light 30 of higher power, and the brightness and stability are higher.
  • FIG. 5 is a schematic structural diagram of a wavelength conversion device according to a fifth embodiment of the present invention.
  • the main difference between the fifth embodiment and the fourth embodiment is that the blue modification sheet 40 and the dichroic color sheet 20 are plated on the outer side and the second side of the first end portion of the wavelength conversion body 10 in the fifth embodiment. The outer side of the end.
  • the specific solutions applicable to the fourth embodiment may be correspondingly applied to the fifth embodiment, in order to save space and avoid repetition, here I won't go into details.
  • the blue light-modifying sheet 40 is plated on the outer side surface of the first end portion, and the dichroic color sheet 20 is plated on the outer side surface of the second end portion. Therefore, there is no air gap between the blue light-modifying sheet 40 wavelength converting body 10, and there is no air gap between the dichroic color sheet 20 and the wavelength converting body 10, and it is no longer necessary to add the outer side surfaces of the first end portion and the second end portion.
  • the antireflection film 11 is more compact in structure, which is advantageous in reducing the volume and production cost of the wavelength conversion device.
  • FIG. 6 is a schematic structural diagram of an illuminating light source according to a sixth embodiment of the present invention.
  • the illuminating light source includes a laser 70 and a wavelength conversion device.
  • the wavelength conversion device is the wavelength conversion device according to the first to fifth embodiments described above, and the laser 70 is provided at a first end of the wavelength conversion device.
  • the specific embodiments applicable to the first to fifth embodiments may be correspondingly applied to the sixth embodiment.
  • no Let me repeat the laser 70 is a blue laser, and the blue laser may be one of a gas laser, a solid laser, and a semiconductor laser.
  • the laser 70 emits blue excitation light 30, which enters the wavelength conversion body 10 from the first end and is converted into a laser beam.
  • an embodiment of the present invention further provides a projection apparatus having the illuminating light source disclosed in the sixth embodiment described above.
  • the wavelength conversion device, the illuminating light source, and the projection apparatus provided by the embodiments of the present invention provide a non-converted receiving of the dichroic color film 20 by providing a dichroic color patch 20 perpendicular to the optical axis direction at the second end portion of the wavelength converting body 10.
  • the laser light is reflected back into the wavelength converting body 10 to be recycled again to generate a laser beam, and the light conversion efficiency of the wavelength converting body 10 is improved.
  • the wavelength conversion device, the illuminating light source, and the projection apparatus provided by the embodiments of the present invention further provide a laser light having an exit angle greater than 90° by providing a blue light-modifying sheet 40 perpendicular to the optical axis direction at the first end portion (ie, the above-mentioned first).
  • the three types of light are reflected back into the wavelength converting body 10, and the laser light (ie, the second type of light described above) of less than 90° is reflected back into the wavelength converting body 10 by the reflecting film 50 disposed in the direction of the parallel optical axis, thereby improving The light utilization efficiency of the wavelength conversion body 10.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Projection Apparatus (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
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Abstract

一种波长转换器件、发光光源和投影设备，波长转换器件包括用于将接收的激发光（30）至少部分转换为受激光的波长转换体（10），激发光（30）从波长转换体（10）的第一端部射入，受激光从波长转换体（10）的第二端部射出，还包括二向色片（20），垂直于波长转换体（10）的光轴方向，并且设于波长转换体（10）的第二端部。通过在波长转换体（10）的第二端部设置有垂直于光轴方向的二向色片（20），二向色片（20）将未转换的受激光反射回波长转换体（10）内再次回收利用产生受激光，提高了波长转换体（10）的光转换效率。

Description

波长转换器件、发光光源和投影设备 技术领域
本发明涉及照明光源领域，尤其是一种波长转换器件、发光光源和投影设备。
 背景技术
高亮度光源经常应用于舞台灯光照明、聚光照明、数字光投影等领域。高亮度光源通过激光器发出的激发光在波长转换体内被转换为波长更长的受激光后射出，从而获得高亮度的出射光。
 技术问题
现有的高亮度光源发出的激发光通过光耦合元件引导至波长转换体内。发明人在实现高亮度光源的过程中发现，进入波长转换体内激发光不会全部转换为受激光射出，未转换的激发光能够随同受激光直接从波长转换体内射出，造成光源的受激光的转换效率较低，亮度不高。
 技术解决方案
鉴于以上内容，有必要提供一种波长转换器件、发光光源和投影设备，旨在解决现有光源的激发光的转换效率较低的缺陷。
为此，本发明首先提供了一种波长转换器件，包括用于将接收的激发光至少部分转换为受激光的波长转换体，所述激发光从所述波长转换体的第一端部射入，所述受激光从所述波长转换体的第二端部射出，还包括二向色片，所述二向色片垂直于所述波长转换体的光轴方向，并且设于所述波长转换体的第二端部。
根据本发明所述的波长转换器件，所述波长转换体采用YAG:Ce3与黄色单晶或陶瓷的混合材料制成，所述二向色片采用透射黄光并且反射蓝光的材料制成，或者，所述波长转换体采用LuAG:Ce3与绿色单晶或者透明陶瓷的混合材料制成，所述二向色片采用透射绿光并且反射蓝光的材料制成。
根据本发明所述的波长转换器件，还包括蓝光修饰片，所述蓝光修饰片垂直于所述波长转换体的光轴方向，并且设于所述波长转换体的第一端部。
根据本发明所述的波长转换器件，所述波长转换体的平行所述波长转换体的光轴方向的至少一侧面设有反射膜。
根据本发明所述的波长转换器件，所述反射膜为介质反射膜、铝反射膜或者银反射膜中的一种或多种。
根据本发明所述的波长转换器件，还包括若干导热衬底，所述导热衬底设于所述波长转换体的平行于所述波长转换体的光轴方向的至少一侧面。
根据本发明所述的波长转换器件，所述导热衬底的材料为铜、铝合金、氮化铝、碳化硅和氧化铝陶瓷中的一种或多种。
根据本发明所述的波长转换器件，所述波长转换体的平行所述波长转换体的光轴方向的至少一侧面通过抛光处理。
根据本发明所述的波长转换器件，所述波长转换体的第一端部和第二端部至少之一的外侧面设有增透膜。
根据本发明所述的波长转换器件，所述蓝光修饰片镀于所述第一端部的外侧面，和/或所述二向色片镀于所述第二端部的外侧面。
根据本发明所述的波长转换器件，所述蓝光修饰片与所述波长转换体的第一端部之间具有空气间隙，和/或所述二向色片与所述波长转换体的第二端部之间具有空气间隙。
本发明还提供了一种发光光源，包括激光器，还包括上述的波长转换器件，所述激光器设于所述波长转换器件的第一端部。
根据本发明提供的发光光源，所述激光器为蓝光激光器，所述蓝光激光器为气体激光器、固体激光器、半导体激光器中的一种。
此外，本发明又提供了一种投影设备，具有上述的发光光源。
 有益效果
相较于现有技术，本发明提供的波长转换器件、发光光源和投影设备通过在波长转换体的第二端部设置有垂直于光轴方向的二向色片，二向色片将未转换的受激光反射回波长转换体内再次回收利用产生受激光，提高了波长转换体的光转换效率。
进一步，本发明提供的波长转换器件、发光光源和投影设备还通过在第一端部设置垂直于光轴方向的蓝光修饰片，将出射角度大于90°的受激光反射回波长转换体内，以及通过设置在平行光轴方向的反射膜将小于90°的受激光反射回波长转换体内，提高了波长转换体的光利用率。
 附图说明
为了更清楚地说明本发明实施例技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明第一实施例提供的波长转换器件的结构示意图。
图2是本发明第二实施例提供的波长转换器件的结构示意图。
图3是本发明第三实施例提供的波长转换器件的结构示意图。
图4是本发明第四实施例提供的波长转换器件的结构示意图。
图5是本发明第五实施例提供的波长转换器件的结构示意图。
图6是本发明第六实施例提供的发光光源的结构示意图。
主要元件符号说明
10 波长转换体
11 增透膜
20 二向色片
30 激发光
31 第一类光
32 残留激发光
33 第三类光
34 第二类光
40 蓝光修饰片
50 反射膜
60 导热衬底
70 蓝光激光器
如下具体实施方式将结合上述附图进一步说明本发明。
 本发明的最佳实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行详细描述。需要说明的是，在不冲突的情况下，本申请的实施方式及实施方式中的特征可以相互组合。在下面的描述中阐述了很多具体细节以便于充分理解本发明，所描述的实施方式仅仅是本发明一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本发明。
在本发明的各实施例中，为了便于描述而非限制本发明，本发明专利申请说明书以及权利要求书中使用的术语 "连接" 并非限定于物理的或者机械的连接， 而是可以包括电性的连接，不管是直接的还是间接的。"上"、"下"、"下方"、"左"、"右"等仅用于表示相对位置关系，当被描述对象的绝对位置改变 后，则该相对位置关系也相应地改变。
发明人在实现波长转换器件的过程中发现，激发光进入波长转换体内后，大部分转换为受激光，但会有少部分激发光没有被转换为受激光（残留激发光），降低了波长转换器件的光效率。此外，激发光进入波长转换体内后产生的受激光依据传播的方向与波长转换体的光轴方向之间的夹角可以分为第一类光、第二类光和第三类光。第一类光的传播方向与波长转换体的光轴方向平行，经所述波长转换体的第二端部和二向色片投射出去。第二类光与波长转换体的光轴方向之间的夹角小于90°；第三类光与波长转换体的光轴方向之间的夹角大于或等于90°。
图1是本发明第一实施例提供的波长转换器件的结构示意图，如图1 所示，该波长转换器件包括波长转换体10和二向色片20。波长转换体10用于将接收的激发光30至少部分转换为受激光。其中，所述激发光30从所述波长转换体10的第一端部射入，所述受激光从所述波长转换体10的第二端部射出。所述二向色片20垂直于所述波长转换体10的光轴方向，并且设于所述波长转换体10的第二端部。本实施方式中，所述二向色片20与所述波长转换体10的第二端部之间具有一定距离，使得二向色片20与所述波长转换体10的第二端部之间具有一空气间隙。
本实施方式中，所述波长转换体10的材料为YAG:Ce3与黄色单晶或陶瓷的混合材料制成，所述二向色片20用于透射黄光并且反射蓝光的材料制成。在另外一些实施方式中，所述波长转换体10的材料也可以为LuAG:Ce3与绿色单晶或者透明陶瓷的混合材料制成，所述二向色片20为透射绿光并且反射蓝光的材料制成。此外，所述波长转换体10的第一端部和第二端部至少之一的外侧面设有增透膜11，优选在第一端部和第二端部的外侧面均设有增透膜11，激发光30从第一端部的增透膜11进入波长转换体10内，从第二端部的增透膜11投射出去，提高了波长转换体10的透射率。
工作时，激发光30所述激发光30从所述波长转换体10的第一端部进入，大部分激发光30在所述波长转换体10内转换为受激光，受激光沿波长转换体30的光轴方向从所述波长转换体10的第二端部射出（图1中示出的第一类光31）。少部分激发光30在波长转换体10内没有被转换为受激光（残留激发光32）从第二端部向外透射时，被二向色片20反射回波长转换体10内（后述简称第二类光34）再次激发波长转换体10产生受激光。
本实施方式提供的波长转换器件、发光光源和投影设备通过在波长转换体10的第二端部设置有垂直于光轴方向的二向色片20，二向色片20将未转换的激发光反射回波长转换体10内再次回收利用产生受激光，提高了波长转换体10的光转换效率。
图2是本发明第二实施例提供的波长转换器件的结构示意图。所述的第二实施方式与第一实施方式的主要区别在于，第二实施方式增加了蓝光修饰片40。需要说明的是，在本发明的精神或基本特征的范围内，适用于第一实施方式中的各具体方案也可以相应的适用于第二实施方式中，为节省篇幅及避免重复起见，在此就不再赘述。
如图2 所示，该波长转换器件还包括蓝光修饰片40，所述蓝光修饰片40垂直于所述波长转换体10的光轴方向，并且设于所述波长转换体10的第一端部。本实施方式中，所述蓝光修饰片40与所述波长转换体10的第一端部之间具有一定距离，使得蓝光修饰片40与所述波长转换体10的第一端部之间具有一空气间隙。
第三类光33在从波长转换体10内向波长转换体10的第一端部透射时，被蓝光修饰片40反射回波长转换体10内，在波长转换体10发生全反射，经多次反射后，最终依次从波长转换体10的第二端部和二向色片20投射出去。
在本实施方式中，反射回波长转换体10内的第三类光33在波长转换体10与外界之间的界面发生全反射从而可以将反射回波长转换体10内的第三类光33得以再次利用。为了提高波长转换体10的全反射效率，优选对波长转换体10的平行所述波长转换体10的光轴方向的至少一侧面通过抛光处理。通过抛光处理后，在波长转换体10的平行于所述波长转换体10的光轴方向的侧面的全反射率达到92%以上，有效提高了波长转换率的光利用效率，而且工艺更简单，成本更低。
本第二实施方式提供的所述波长转换器件除了具有在第一实施方式中所提到的技术效果之外，还在通过蓝光修饰片40将上述的第三类光33再次反射回波长转换体10内，经多次反射后从第二端部和二向色片20投射出去，提高了光的利用效率和光源的亮度。
图3是本发明第三实施例提供的波长转换器件的结构示意图。所述的第三实施方式与第二实施方式的主要区别在于，第三实施方式增加了反射膜50。需要说明的是，在本发明的精神或基本特征的范围内，适用于第二实施方式中的各具体方案也可以相应的适用于第三实施方式中，为节省篇幅及避免重复起见，在此就不再赘述。
如图3所示，该波长转换器件还包括反射膜50，反射膜50设于所述波长转换体10的平行所述波长转换体10的光轴方向的至少一侧面，优选在平行所述波长转换体10的光轴方向的四个侧面均设置有反射膜50。所述反射膜50可以是介质反射膜、铝反射膜或者银反射膜中的一种或多种。各侧面的反射膜50的材料可以相同，也可以不相同，本领域技术人员可以根据需要进行设置。
本第三实施方式提供的所述波长转换器件除了具有在第二实施方式中所提到的技术效果之外，还通过上述的第二类光34，即传播方向与光轴方向之间的夹角小于90°的光经反射膜50的多次反射，从波长转换体10和二向色片20透射出去。并且，被蓝光修饰片40反射回波长转换体10内的第三类光33也可以被反射膜50多次反射，再次从波长转换体10和二向色片20透射出去，有效提高了光的利用效率和光源的亮度。
图4是本发明第四实施例提供的波长转换器件的结构示意图。所述的第四实施方式与第三实施方式的主要区别在于，第四实施方式增加了导热衬底60。需要说明的是，在本发明的精神或基本特征的范围内，适用于第二实施方式中的各具体方案也可以相应的适用于第三实施方式中，为节省篇幅及避免重复起见，在此就不再赘述。
如图4所示，该波长转换器件还包括若干导热衬底60，所述导热衬底60设于所述波长转换体10的平行于所述波长转换体10的光轴方向的至少一侧面。例如导热衬底60可以是1个、2个、3个或者4个，分别设于所述波长转换体10的平行于光轴方向的侧面。所述波长转换体10通过所述反射膜50与所述导热衬底60连接。所述导热衬底60的材料为铜、铝合金、氮化铝、碳化硅和氧化铝陶瓷中的一种或多种。本实施方式中，导热衬底60为一个，设置在波长转换体10的下方 ，在波长转换体10的下方与反射膜50连接，但导热衬底60的数量也可以是多个，即在多个平行于光轴方向的反射膜50连接有导热衬底60。
本第四实施方式提供的所述波长转换器件除了具有在第三实施方式中所提到的技术效果之外，还设置了一个或多个通过反射膜50连接于波长转换体10的导热衬底60，可以将波长转换体10受激产生的热量传导出去，因而能够承受更高功率的激发光30激发，亮度和稳定性更高。
图5是本发明第五实施例提供的波长转换器件的结构示意图。所述的第五实施方式与第四实施方式的主要区别在于，第五实施方式中将蓝光修饰片40和二向色片20镀在波长转换体10的第一端部的外侧面和第二端部的外侧面。需要说明的是，在本发明的精神或基本特征的范围内，适用于第四实施方式中的各具体方案也可以相应的适用于第五实施方式中，为节省篇幅及避免重复起见，在此就不再赘述。
如图5所示，所述蓝光修饰片40镀于所述第一端部的外侧面，所述二向色片20镀于所述第二端部的外侧面。因而蓝光修饰片40波长转换体10之间没有空气间隙，二向色片20与波长转换体10之间也没有空气间隙，而且不再需要在第一端部和第二端部的外侧面增设增透膜11，这样结构更为紧凑，有利于降低波长转换器件的体积和生产成本。
图6是本发明第六实施例提供的发光光源的结构示意图。如图6所示，该发光光源包括激光器70和波长转换器件。其中，所述波长转换器件为上述第一至第五实施方式中涉及的波长转换器件，所述激光器70设于所述波长转换器件的第一端部。在本发明的精神或基本特征的范围内，适用于第一至第五实施方式中的各具体方案也可以相应的适用于第六实施方式中，为节省篇幅及避免重复起见，在此就不再赘述。本实施方式中，所述激光器70为蓝光激光器，所述蓝光激光器可以是气体激光器、固体激光器、半导体激光器中的一种。激光器70发出蓝色的激发光30，从第一端部进入波长转换体10内转换为受激光。
最后，本发明实施方式还提供了一种投影设备，该投影设备具有上述第六实施方式公开的发光光源。
本发明实施方式提供的波长转换器件、发光光源和投影设备通过在波长转换体10的第二端部设置有垂直于光轴方向的二向色片20，二向色片20将未转换的受激光反射回波长转换体10内再次回收利用产生受激光，提高了波长转换体10的光转换效率。
进一步，本发明实施方式提供的波长转换器件、发光光源和投影设备还通过在第一端部设置垂直于光轴方向的蓝光修饰片40，将出射角度大于90°的受激光（即上述的第三类光）反射回波长转换体10内，以及通过设置在平行光轴方向的反射膜50将小于90°的受激光（即上述的第二类光）反射回波长转换体10内，提高了波长转换体10的光利用率。
在本发明所提供的几个具体实施方式中，应该理解到，所揭露的器件、机构可以通过其它的方式实现。对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化涵括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。此外，显然“包括”一词不排除其他单元或步骤，单数不排除复数。第一，第二等词语用来表示名称，而并不表示任何特定的顺序。
以上实施方式仅用以说明本发明的技术方案而非限制，尽管参照以上较佳实施方式对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或等同替换都不应脱离本发明技术方案的精神和范围。

Claims (14)

1. 一种波长转换器件，包括用于将接收的激发光至少部分转换为受激光的波长转换体，所述激发光从所述波长转换体的第一端部射入，所述受激光从所述波长转换体的第二端部射出，其特征在于，还包括二向色片，所述二向色片垂直于所述波长转换体的光轴方向，并且设于所述波长转换体的第二端部。
2. 如权利要求1所述的波长转换器件，其特征在于，所述波长转换体采用YAG:Ce3与黄色单晶或陶瓷的混合材料制成，所述二向色片用于透射黄光并且采用反射蓝光的材料制成；或者，所述波长转换体的材料为采用LuAG:Ce3与绿色单晶或者透明陶瓷的混合材料制成，所述二向色片为透射绿光并且采用反射蓝光的材料制成。
3. 如权利要求1所述的波长转换器件，其特征在于，还包括蓝光修饰片，所述蓝光修饰片垂直于所述波长转换体的光轴方向，并且设于所述波长转换体的第一端部。
4. 如权利要求1所述的波长转换器件，其特征在于，所述波长转换体的平行所述波长转换体的光轴方向的至少一侧面设有反射膜。
5. 如权利要求4所述的波长转换器件，其特征在于，所述反射膜为介质反射膜、铝反射膜或者银反射膜中的一种或多种。
6. 如权利要求4所述的波长转换器件，其特征在于，还包括若干导热衬底，所述导热衬底设于所述波长转换体的平行于所述波长转换体的光轴方向的至少一侧面。
7. 如权利要求6所述的波长转换器件，其特征在于，所述导热衬底的材料为铜、铝合金、氮化铝、碳化硅和氧化铝陶瓷中的一种或多种。
8. 如权利要求1所述的波长转换器件，其特征在于，所述波长转换体的平行所述波长转换体的光轴方向的至少一侧面通过抛光处理。
9. 如权利要求1所述的波长转换器件，其特征在于，所述波长转换体的第一端部和第二端部至少之一的外侧面设有增透膜。
10. 如权利要求3所述的波长转换器件，其特征在于，所述蓝光修饰片镀于所述第一端部的外侧面，和/或所述二向色片镀于所述第二端部的外侧面。
11. 如权利要求3所述的波长转换器件，其特征在于，所述蓝光修饰片与所述波长转换体的第一端部之间具有空气间隙，和/或所述二向色片与所述波长转换体的第二端部之间具有空气间隙。
12. 一种发光光源，包括激光器，其特征在于，还包括如权利要求1-11任一项所述的波长转换器件，所述激光器设于所述波长转换器件的第一端部。
13. 如权利要求12所述的发光光源，其特征在于，所述激光器为蓝光激光器，所述蓝光激光器为气体激光器、固体激光器、半导体激光器中的一种。
14. 一种投影设备，其特征在于，具有如权利要求12或13所述的发光光源。
PCT/CN2017/094798 2017-04-27 2017-07-28 波长转换器件、发光光源和投影设备 Ceased WO2018196196A1 (zh)

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