WO2020088671A1 - 照明系统 - Google Patents

照明系统 Download PDF

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Publication number
WO2020088671A1
WO2020088671A1 PCT/CN2019/115130 CN2019115130W WO2020088671A1 WO 2020088671 A1 WO2020088671 A1 WO 2020088671A1 CN 2019115130 W CN2019115130 W CN 2019115130W WO 2020088671 A1 WO2020088671 A1 WO 2020088671A1
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Prior art keywords
light
light source
excitation light
excitation
color wheel
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PCT/CN2019/115130
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English (en)
French (fr)
Inventor
李龙
徐君
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苏州乐梦光电科技有限公司
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Publication of WO2020088671A1 publication Critical patent/WO2020088671A1/zh

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    • 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
    • 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

  • This application relates to a lighting system.
  • blue light is generally used as the main light source.
  • the light emitted by the blue light is converted into yellow light and green light by the fluorescent light source, and then converted into the untranslated blue light combined light by the filter color wheel
  • the three colors of red, green and blue are projected on the DMD chip to form the image seen by the human eye.
  • the current lighting system usually has the following settings: 1. Most of the laser light sources in the related art use blue lasers to excite yellow and green light on the fluorescent wheel; there will be an area on the fluorescent wheel that is not excited Area, allowing blue light to pass through; 2.
  • Laser light sources in related technologies mostly use blue light to pass through the dichroic film to excite the phosphor on the fluorescent wheel; 3.
  • the design on the fluorescent wheel is divided into at least an excitation area and a non-excitation area; 4.
  • the arrangement of multiple lasers is the way of using array reflectors.
  • the lighting system in the related art generally has the following problems:
  • the blue light passes through the fluorescent wheel.
  • a separate optical path system such as a lens and a reflector needs to be added, so that the light converted by the blue light and the fluorescent wheel will meet, increasing the cost and making the overall light source larger.
  • the phosphor is excited by blue light transmission, and the generated excitation light needs to be reflected by the dichroic sheet and enter the light pipe.
  • the excitation light angle and the spectral range are large, which is greatly affected by the tolerance of the structure and optical materials;
  • the array reflector is adopted. In order to match the output with the shape of the optomechanical chip, multiple groups cannot be arranged, and the intermediate structure interval will also be very large, resulting in a large light spot.
  • the present application provides a monochromatic and / or dual-color lighting system capable of realizing high power and high brightness, being small in size, and capable of providing better blue light such as 465 nm and / or red 630 nm red light.
  • An illumination system includes a first light source that emits first excitation light, a second light source that emits second excitation light, a color wheel that converts the first excitation light into converted light, and a two-way direction that reflects the excited light and transmits the converted light Color chip, the first excitation light and the second excitation light are blue light, the color wheel is provided with a wavelength conversion material that absorbs the first excitation light to convert into converted light, and the wavelength of the first excitation light and the converted light Of different wavelengths;
  • the dichroic sheet has a first surface and a second surface; the first surface faces the first light source and the color wheel, and the dichroic color wheel reflects the first excitation light emitted by the first light source to the color On the wavelength conversion material of the wheel, the color wheel projects the converted light onto the first face of the dichroic sheet; the second face faces the second light source and reflects the second excitation light.
  • FIG. 1 is a schematic structural diagram of a lighting device shown in an embodiment of the present application
  • FIG. 2 is a schematic plan view of a color wheel used in the lighting device shown in FIG. 1;
  • FIG. 3 is a cross-sectional view of an X-type filter used in the lighting device shown in FIG. 1;
  • FIG. 4 is a timing chart of laser light emission used in the lighting device shown in FIG. 1;
  • Figure 5 is a schematic diagram of the notch filter film
  • FIG. 6 is a schematic structural diagram of a lighting device shown in another embodiment of the present application.
  • an illumination system shown in an embodiment of the present application includes a first light source emitting first excitation light 1, a second light source 4 emitting second excitation light, and converting the first excitation light into a conversion A color wheel 3 of light, and a dichroic sheet 2 that reflects the first excitation light and transmits the converted light.
  • the color wheel 3 is provided with a wavelength conversion material that absorbs first excitation light to be converted into converted light, and the wavelength of the first excitation light is different from the converted light.
  • the dichroic film 2 has a deflection color wheel 3 and a first surface of the first light source 1 and a second surface facing away from the color wheel 3.
  • the first surface of the dichroic color wheel 3 reflects the first excitation light emitted by the first light source 1 to the wavelength conversion material of the color wheel 2, and the wavelength conversion material converts the first excitation light into converted light.
  • the color wheel 3 projects the converted light onto the first surface of the dichroic film 2; the second surface of the dichroic film 2 faces the second light source 4 and reflects the second excitation light.
  • the dichroic film is inverted blue, red, yellowish green.
  • the first light source 1 is a light source matrix.
  • the lighting system further includes a filter disposed in the light source matrix (first light source 1).
  • the first light source 1 may use nine laser lamps, and the nine laser lamps form three laser beams. Of course, in actual use, more or less than 9 laser lights are acceptable.
  • the filter uses an X-type filter.
  • other types of filters may be used according to actual needs, such as an L-type filter.
  • Three lasers can be synthesized through the X-type filter. Please refer to FIG. 3.
  • the blue light can be reflected and transmitted at different positions to achieve synthesis.
  • the second light source 4 may also use a light source matrix.
  • the first light source 1 and the second light source 4 emit light alternately or at the same time. When the first light source 1 and the second light source 4 emit light alternately, the laser light emission timing formed by them is shown in FIG.
  • a closed ring structure 31 is formed on the color wheel 3, and the wavelength conversion material is formed in the ring structure 31.
  • the wavelength conversion material is only one type, which is a yellow wavelength conversion material that converts the first excitation light into yellow light.
  • the wavelength conversion material may also be other, such as a green wavelength conversion material that converts the first excitation light into green light, or the wavelength conversion material may be two types, such as one that converts the first excitation light
  • the yellow wavelength conversion material that is converted into yellow light, the other is a green wavelength conversion material that converts the first excitation light into green light, of course, you can also set up more different wavelength conversion materials according to actual needs.
  • the setting is related to the dichroic film 2.
  • the dichroic film is set to reverse blue, red, yellow and green. Therefore, the wavelength conversion material is set to yellow wavelength conversion material and / or green wavelength conversion material, as in In other embodiments, if the dichroic sheet is set to reverse blue, translucent, red, yellow, and green, the wavelength conversion material may be set to yellow wavelength conversion material, green wavelength conversion material, or red wavelength conversion material.
  • the ring structure 31 may be partitioned, and the wavelength conversion materials provided in the two adjacent areas are different. For example, yellow wavelength conversion materials and green wavelength conversion materials are provided in the two adjacent areas.
  • the lighting system further includes a light pipe 9, converted light transmitted through the dichroic sheet 2, and reflected by the dichroic sheet 2 are emitted by the second light source 4
  • the second excitation light of the light pipe 9 is transmitted to the outside, and the light pipe 9 mixes the received converted light and the second excitation light.
  • the lighting system further includes a first lens 7 disposed between the light pipe 9 and the dichroic sheet 2.
  • the lighting system further includes a first lens module 5 located between the first light source 1 and the dichroic sheet 2, and disposed between the dichroic sheet 2 and the color wheel 3 A second lens module 6 and a third lens module 8 disposed between the dichroic sheet 2 and the second light source 4.
  • the blue light emitted by the first light source 1 is transmitted to the first surface of the dichroic sheet 2 through the first lens module 5, the first lens module 5 includes a convex lens arranged in sequence along the propagation direction of the optical path, Concave lens and diffuser.
  • the second lens module 6 includes at least two convex lenses arranged in parallel.
  • the third lens module 8 includes a convex lens, a concave lens, and a diffusion sheet arranged in sequence along the propagation direction of the optical path. It is true that in some embodiments, the first lens module 5 may include at least one convex lens; in some embodiments, the third lens module 8 may include at least one convex lens.
  • the lighting system further includes a third light source that emits third excitation light, the third excitation light is red light; the third light source emits third excitation light to the dichroic color wheel The second surface is reflected by the second surface of the dichroic wheel to the light guide tube.
  • the light guide tube mixes the received converted light, the second excitation light, and the third excitation light. If the converted light is yellow light and green light, the light guide tube can place the yellow light, green light, blue light, and red light in the light The position is mixed into white light.
  • the first light source and the second light source emit light alternately or simultaneously, and the second light source and the third light source emit light simultaneously.
  • the lighting system may further include a color filter or a notch filter film, which is installed before the light pipe.
  • the converted light transmitted by the dichroic filter and the second excitation light reflected by the dichroic filter pass through the color filter before entering the Said light pipe.
  • a third light source may be provided at the same time, the third light source is red light, and the third light source reflects the dichroic sheet through the color filter wheel before entering the light pipe.
  • the notch filter film 11 if the notch filter film 11 is provided, the converted light transmitted through the dichroic sheet 2 and the second excitation light reflected by the dichroic sheet 2 pass first The notch filter film 11 then enters the light pipe 9.
  • the notch filter film 11 is a better static filter to replace the color wheel. Please refer to FIG. 5, the notch filter film 11 can divide the yellow light into green light and red light, thereby replacing the color wheel, and Since the notch filter film 11 has no rotating parts, it is relatively more economical.
  • a third light source may be provided at the same time. The third light source is red light, and the third light source reflects the dichroic film 2 through the notch filter film 11 before entering the light pipe 9.
  • the lighting system further includes a notch filter film, the converted light transmitted through the dichroic sheet, and the second excitation light reflected by the dichroic sheet first pass through the notch filter film Then enter the light pipe.
  • the first light path is formed by the first light source 1, the dichroic film 2 and the color wheel 3, and the second light path is formed by the second light source 4 and the dichroic film 2, and the two light paths are used to enable the entire lighting system to achieve high Power and high brightness, and better color (by introducing red laser and longer wavelength blue laser);
  • the first light source adopts 9 laser lamps and X-type filters to achieve 9 sets of laser synthesis, increase the total optical power, increase the brightness of the light source, and improve the light efficiency.
  • the color wheel By setting the color wheel into a closed ring structure, the color wheel can be designed to be excited in the whole area, and the balance and stability of the entire color wheel are increased.
  • the lighting system of the present application forms a first optical path through a first light source, a dichroic film and a color wheel, forms a second optical path through a second light source and a dichroic film, and passes through the two optical paths to enable the entire lighting system to achieve high power.

Abstract

一种照明系统，包括发出第一激发光的第一光源(1)、发出第二激发光的第二光源(4)、将第一激发光转换成转换光的色轮(3)、以及反射激发光和透射转换光的二向色片(2)，色轮(3)上设置有吸收第一激发光以转换成转换光的波长转换材料；二向色片(2)具有第一面和第二面；二向色片(2)将第一光源(1)所发出的第一激发光反射至色轮(3)的波长转换材料上，色轮(3)将转换光投射至二向色片(2)的第一面；第二面朝向第二光源(4)并将第二激发光反射。

Description

照明系统
本公开要求在2018年11月03日提交中国专利局、申请号为201811304173.7的中国专利申请的优先权，以上申请的全部内容通过引用结合在本公开中。
技术领域
本申请涉及一种照明系统。
背景技术
相关技术中的激光投影仪光路模组中，一般采用蓝光作为主光源，蓝光发出的光线通过荧光光源转化为黄光和绿光，然后和未经转化的蓝光合光一起经过滤色轮转化为红绿蓝三色投射在DMD芯片上，从而形成人眼所看到的图像。但是，目前的照明系统中，通常为如下设置：1、相关技术中的激光光源采用的方案大多是蓝色激光在荧光轮上激发出黄色光与绿光；荧光轮上会有一个区域是非激发区,使蓝光透过；2、相关技术中的激光光源多采用蓝光透过二向色片激发荧光轮上的荧光粉；3、荧光轮上设计至少分激发区与非激发区；4、相关技术中，多激光的排列方式是采用阵列反光镜的方式。但是，相关技术中的照明系统普遍存在如下问题：
1、蓝光透过荧光轮，这一路蓝光需要增加透镜与反光镜等单独的光路系统，使蓝光与荧光轮转化出来的光会合，增加了成本，使整体的光源体积变大；
2、采用蓝光透射方式激发荧光粉，产生的激发光需要通过二向色片反射后进入光导管，激发光角度与光谱范围大，受结构与光学材料公差影响大；
3、色轮非激发区没有荧光粉，整个荧光轮失衡，需要做额外的补偿，整个色轮的平衡性与平面度较差；
4、采用阵列反光镜的方式，为了使输出与光机芯片形状匹配，无法多组排列，并且中间的结构间隔也会非常大，从而导致光斑大。
发明内容
本申请提供一种能够实现高功率和高亮度，且体积小并能提供更好的蓝色如465nm和/或红色630nm红光的单色和/或双色照明系统。
本申请提供如下技术方案：
一种照明系统，包括发出第一激发光的第一光源、发出第二激发光的第二光源、将第一激发光转换成转换光的色轮、以及反射激发光和透射转换光的二向色片，所述第一激发光、第二激发光为蓝光，所述色轮上设置有吸收第一激发光以转换成转换光的波长转换材料，所述第一激发光的波长与转换光的波长不同；
所述二向色片具有第一面和第二面；所述第一面朝向第一光源和色轮，所述二向色轮将第一光源所发出的第一激发光反射至所述色轮的波长转换材料上，所述色轮将转换光投射至所述二向色片的第一面；所述第二面朝向第二光源并将所述第二激发光反射。
附图说明
图1为本申请一实施例所示的照明装置的结构示意图；
图2为应用在图1所示的照明装置中的色轮的平面示意图；
图3为应用在图1所示的照明装置中的X型滤光片的剖视图；
图4为用于图1所示的照明装置的激光发光时序图；
图5为陷波滤波膜的滤波示意图；
图6为本申请另一种实施例所示的照明装置的结构示意图。
具体实施方式
下面结合附图和实施例，对本申请的具体实施方式作进一步详细描述。以下实施例用于说明本申请，但不用来限制本申请的范围。
请参见图1并结合图2，本申请一实施例所示的照明系统包括发出第一激发光的第一光源1、发出第二激发光的第二光源4、将第一激发光转换成转换光的色轮3、以及反射第一激发光和透射转换光的二向色片2。所述色轮3上设置有吸收第一激发光以转换成转换光的波长转换材料，所述第一激发光的波长与转换光的波长不同。所述二向色片2具有偏向色轮3和第一光源1的第一面和背向色轮3的第二面。所述二向色轮3的第一面将第一光源1所发出的第一激发光反射至所述色轮2的波长转换材料上，由波长转换材料将第一激发光转换成转换光，所述色轮3将转换光投射至所述二向色片2的第一面；所述二向色片2的第二面朝向第二光源4并将所述第二激发光反射。在本实施例中，该二向色片为反蓝红透黄绿。该第一光源1为光源矩阵。所述照明系统还包括设置在所 述光源矩阵(第一光源1)内的滤光片。该第一光源1可以采用9个激光灯，9个激光灯形成三路激光。当然，在实际使用中多于或者少于9个激光灯皆可。在本实施例中，滤光片采用X型滤光片，当然，在其他实施方式中，可以根据实际需求采用其他类型的滤光片，如L型滤光片。通过该X型滤光片可将三路激光合成，请参见图3，通过在X型滤光片上镀不同膜层，实现不同位置的蓝光反射与透过，从而实现合成。该第二光源4在实际使用中也可以采用光源矩阵。在一些实施例中，所述第一光源1、第二光源4交替发光或同时发光，当第一光源1、第二光源4交替发光时，其所形成的激光发光时序如图4所示。
请参见图2，在一些实施例中，所述色轮3上形成有闭合的环形结构31，所述波长转换材料形成在环形结构31内。本实施例中，波长转换材料该波长转换材料仅为一种，为将第一激发光转换成黄光的黄色波长转换材料。在其他实施方式中，该波长转换材料也可以为其他，如将第一激发光转换成绿光的绿色波长转换材料，或者，该波长转换材料可以为两种，如一种为将第一激发光转换成黄光的黄色波长转换材料，另一种为将第一激发光转换成绿光的绿色波长转换材料，当然，也可以根据实际需求设置更多种不同的波长转换材料，波长转换材料的设置与二向色片2相关，在本实施例中，二向色片设置成反蓝红透黄绿，所以，将波长转换材料设置成黄色波长转换材料和/或绿色波长转换材料，如在其他实施方式中，将二向色片设置成反蓝透红黄绿，则可以将波长转换材料设置成黄色波长转换材料、绿色波长转换材料、红色波长转换材料。当波长转换材料为多种时，环形结构31可分区，相邻两个区内所设置的波长转换材料不同，如相邻两个区内分别设置黄色波长转换材料和绿色波长转换材料。
请结合图1，在一些实施例中，所述照明系统还包括光导管9，经所述二向色片2透射的转换光、经所述二向色片2反射的由第二光源4发射的第二激发光所述光导管9传输至外部，所述光导管9将所接收到的转换光和第二激发光混合。
在一些实施例中，所述照明系统还包括设置在所述光导管9与二向色片2之间的第一透镜7。在一些实施例中，所述照明系统还包括位于所述第一光源1与二向色片2之间的第一透镜模组5、设置在所述二向色片2与色轮3之间的第二透镜模组6、以及设置在所述二向色片2与第二光源4之间的第三透镜模组8。所述第一光源1所发出蓝光经第一透镜模组5传递至所述二向色片2的第一面上，所述第一透镜模组5包括沿光路的传播方向依次设置的凸透镜、凹透镜和 扩散片。在一些实施例中，所述第二透镜模组6包括至少两个平行排列的凸透镜。在一些实施例中，所述第三透镜模组8包括沿光路的传播方向依次设置的凸透镜、凹透镜和扩散片。诚然，在一些实施例中，所述第一透镜模组5可以包括至少一个凸透镜；在一些实施例中，所述第三透镜模组8可以包括至少一个凸透镜。
在其他实施例中，所述照明系统还包括发出第三激发光的第三光源，所述第三激发光为红光；所述第三光源发出第三激发光至所述二向色轮的第二面，并由所述二向色轮的第二面反射至导光管。导光管将所接收到的转换光、第二激发光、第三激发光混合，若转换光为黄光和绿光，则导光管可以将黄光、绿光、蓝光和红光在该位置混合成白光。所述第一光源、第二光源交替发光或同时发光，所述第二光源、第三光源同时发光。
在一些实施例中，所述照明系统还可以包括滤色轮或陷波滤波膜，该滤色轮或陷波滤波膜安装在所述光导管之前。
在一些实施例中，若设置有滤色轮，则经所述二向色片透射的转换光、经所述二向色片反射的第二激发光先通过所述滤色轮后再进入所述光导管。通过该滤色轮可以获得更好的颜色，可根据客户要求定制。当安装有滤色轮时，可以同时设置第三光源，该第三光源为红光，第三光源将二向色片反射先通过滤色轮后再进入光导管。
请参见图6，在一些实施例中，若设置有陷波滤波膜11，则经所述二向色片2透射的转换光、经所述二向色片2反射的第二激发光先通过所述陷波滤波膜11后再进入所述光导管9。该陷波滤波膜11是一种更好的代替滤色轮的静态滤波器，请参见图5，陷波滤波膜11可以把黄色光分割成绿光和红光，从而替代滤色轮，而由于该陷波滤波膜11无转动部件，所以，相对更经济。根据实际需求，可以同时设置第三光源，该第三光源为红光，第三光源将二向色片2反射先通过陷波滤波膜11后再进入光导管9。
在一些实施例中，所述照明系统还包括陷波滤波膜，经所述二向色片透射的转换光、经所述二向色片反射的第二激发光先通过所述陷波滤波膜后再进入所述光导管。
本申请的照明系统具有如下优点：
1、通过第一光源1、二向色片2和色轮3形成第一光路，通过第二光源4和二向色片2形成第二光路，通过两个光路以使得整个照明系统能够实现高功 率和高亮度，和更好的颜色(通过引入红色激光和更长波长的蓝色激光)；
2、本照明系统相对其他照明系统整体体积更小；
3、通过第一光源采用9个激光灯和X型滤光片，从而实现9组激光合成，提高总的光功率，提高光源亮度，且提升光效。
4、通过将色轮设置成闭合的环形结构，可使色轮设计成全区域激发，整个色轮的平衡性与稳定性增加。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
本申请的照明系统通过第一光源、二向色片和色轮形成第一光路，通过第二光源和二向色片形成第二光路，通过两个光路以使得整个照明系统能够实现高功率，高亮度和更鲜艳的色彩；且体积小，从而能提供更好的蓝色如465nm和/或红色630nm红光的单色和/或双色照明系统。

Claims (10)

  1. 一种照明系统，包括发出第一激发光的第一光源、发出第二激发光的第二光源、将第一激发光转换成转换光的色轮、以及反射激发光和透射转换光的二向色片，所述第一激发光、第二激发光为蓝光，所述色轮上设置有吸收第一激发光以转换成转换光的波长转换材料，所述第一激发光的波长与转换光的波长不同；
    所述二向色片具有第一面和第二面；所述第一面朝向第一光源和色轮，所述二向色轮将第一光源所发出的第一激发光反射至所述色轮的波长转换材料上，所述色轮将转换光投射至所述二向色片的第一面；所述第二面朝向第二光源并将所述第二激发光反射。
  2. 如权利要求1所述的照明系统，所述照明系统还包括设置在所述光源矩阵内的滤光片。
  3. 如权利要求1所述的照明系统，所述照明系统还包括光导管，所述光导管接收所述二向色片反射的第二激发光、透射的转换光。
  4. 如权利要求3所述的照明系统，所述照明系统还包括滤色轮，经所述二向色片透射的转换光、经所述二向色片反射的第二激发光先通过所述滤色轮后再进入所述光导管。
  5. 如权利要求3所述的照明系统，所述照明系统还包括陷波滤波膜，经所述二向色片透射的转换光、经所述二向色片反射的第二激发光先通过所述陷波滤波膜后再进入所述光导管。
  6. 如权利要求1或4或5所述的照明系统，所述照明系统还包括发出第三激发光的第三光源，所述第三激发光为红光；所述第三光源发出第三激发光至所述二向色轮的第二面，并由所述二向色轮的第二面反射。
  7. 如权利要求6所述的照明系统，其中，所述第一光源、第二光源交替发光或同时发光，所述第二光源、第三光源同时发光。
  8. 如权利要求1所述的照明系统，其中，所述第一光源、第二光源交替发光或同时发光。
  9. 如权利要求1所述的照明系统，其中，所述色轮上形成有闭合的环形结构，所述波长转换材料形成在环形结构内。
  10. 如权利要求9所述的照明系统，其中，所述环形结构内的波长转换材料为一种，或者，所述环形结构内的波长转换材料为两种或两种以上。
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