WO2017215348A1 - 投影光源***的出光均匀性调节装置及投影设备 - Google Patents

投影光源***的出光均匀性调节装置及投影设备 Download PDF

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Publication number
WO2017215348A1
WO2017215348A1 PCT/CN2017/081413 CN2017081413W WO2017215348A1 WO 2017215348 A1 WO2017215348 A1 WO 2017215348A1 CN 2017081413 W CN2017081413 W CN 2017081413W WO 2017215348 A1 WO2017215348 A1 WO 2017215348A1
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Prior art keywords
light
excitation light
wavelength conversion
dichroic mirror
conversion mechanism
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PCT/CN2017/081413
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English (en)
French (fr)
Inventor
胡飞
周宇轩
李屹
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深圳市绎立锐光科技开发有限公司
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Publication of WO2017215348A1 publication Critical patent/WO2017215348A1/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

Definitions

  • the present application relates to a projection light source system, and more particularly to a device for adjusting the uniformity of light output by a laser in a projection light source system.
  • the light source using the wavelength conversion principle has the problem of excitation light and laser separation.
  • One common separation method is to use an incident exit separation mechanism with a hole, such as a mirror, through which the excitation light is applied to the wavelength conversion mechanism, and the wavelength conversion material converts the excitation light into a laser.
  • the laser light is reflected by the incident exit separation mechanism to be separated from the excitation light.
  • a dichroic mirror may be placed on the hole of the incident exit separation mechanism.
  • the dichroic mirror can separate most of the laser light from the excitation light reflected by the wavelength conversion mechanism, only a small part and excitation.
  • the laser spectrum is close to being lost by the laser.
  • the disadvantage of this solution is that in the laser light emitted by the wavelength conversion mechanism, the laser light (spectrum proximity) of the same color as the excitation light incident on the wavelength conversion mechanism is lost to the portion corresponding to the dichroic mirror, and thus the laser light is received.
  • a hole is formed in the spot, which must be in the center of the spot, and the shape is completely symmetrical, otherwise the blue light may be unevenly distributed on the screen after passing through the lens. Whether the hole is in the center of the spot, whether the shape is symmetrical depends on whether the mirror and the dichroic mirror are in the same plane, whether it is an ideal plane, no curvature, etc., which imposes high requirements on the manufacturing process, and it is often difficult in reality. Satisfy.
  • the present application provides a novel uniformity adjusting device for a projection light source system and a projection apparatus using the same to improve the uniformity of light emitted by the laser.
  • the light uniformity adjusting device provided by the present application comprises:
  • An incident exit separation mechanism comprising a mirror and a dichroic mirror
  • the excitation light is reflected or transmitted through the dichroic mirror and then irradiated to the wavelength conversion mechanism, and after the wavelength conversion mechanism is operated, a plurality of different wavelengths of the emitted light are formed, and the emitted light is emitted by the wavelength conversion mechanism.
  • the first type is received by the laser, and the emitted light further includes a second type of laser light emitted by the wavelength conversion mechanism and/or excitation light reflected by the wavelength conversion mechanism, and the dichroic mirror generates and excites the second type of laser light. The same reflection or transmission phenomenon of light, while transmitting or reflecting the first type of laser light opposite to the second type of excitation light;
  • a diffusing sheet at least in the second type of exiting light path of the laser and/or the excitation light reflected by the wavelength converting mechanism, the diffusing sheet being disposed at least for the second type of laser light and/or by the wavelength conversion mechanism
  • the excitation light is subjected to a scattering homogenization process.
  • a spectral trimming mechanism is further included, the diffusing sheet being disposed after the spectral trimming mechanism.
  • the wavelength converting mechanism is a fluorescent color wheel
  • the spectral trimming mechanism is a filter
  • the filter rotates in synchronization with the fluorescent color wheel
  • the diffusion sheet rotates in synchronization with the filter and the fluorescent color wheel.
  • the filter is fixed to the fluorescent color wheel and integrally rotates with the fluorescent color wheel.
  • the filter and the diffusion sheet are fixed in a unitary structure.
  • the diffusing sheet is an astigmatism filter having both an astigmatism and a filtering function.
  • a hole is provided in a middle portion of the mirror, and the dichroic mirror is installed in the hole.
  • the mirror is disposed separately from the dichroic mirror, and the excitation light source is directed to the wavelength conversion mechanism by the reflection of the dichroic mirror.
  • the projection apparatus provided by the present application includes the light-emitting uniformity adjusting device according to any one of the above.
  • the adjustment device comprises an excitation light source, an incident exit separation mechanism, a wavelength conversion mechanism, and a diffusion sheet.
  • the excitation light source is reflected or transmitted through the dichroic mirror in the incident exit separation mechanism and then irradiated to the wavelength conversion mechanism, and after being acted by the wavelength conversion mechanism, a plurality of different wavelengths of the emitted light are formed, and the emitted light includes the first issued by the wavelength conversion mechanism.
  • a type of laser further comprising a second type of laser light and/or excitation light reflected by a wavelength conversion mechanism, and the dichroic mirror produces the same reflection or transmission phenomenon as the excitation light by the laser. When it is emitted, it is affected by the dichroic mirror, and a hole is formed in the spot.
  • a diffusing sheet is provided, the diffusing sheet being at least for the second type of laser light and/or the excitation light reflected by the wavelength converting means.
  • the scattering and homogenizing treatment is performed to reduce the requirement for the symmetrical coincidence of the laser light, and to improve the white field color uniformity of the light source after passing through the lens.
  • FIG. 1 is a schematic structural diagram of a first embodiment of a light uniformity adjusting device of the present application
  • FIG. 2 is a schematic structural diagram of a second embodiment of the light uniformity adjusting device of the present application.
  • Fig. 3 is a schematic view showing the structure of a third embodiment of the light uniformity adjusting device of the present application.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the first embodiment provides a light-emitting uniformity adjusting device for a projection light source system, which can improve uniformity of light emitted by a laser in a projection light source system.
  • the light uniformity adjusting device includes an excitation light source 1, an incident exit separation mechanism 2a, a wavelength conversion mechanism 4, and a diffusion sheet 6.
  • the excitation light source 1 is for emitting excitation light.
  • the incident exit separation mechanism 2a includes a mirror 21a and a dichroic mirror 22a, and the incident of the excitation light and the emission of the laser light and/or the reflected excitation light are realized by the cooperation of the mirror 21a and the dichroic mirror 22a.
  • the excitation light is reflected or transmitted through the dichroic mirror 22a, and then irradiated to the wavelength conversion mechanism 4, and after being acted by the wavelength conversion mechanism 4, a plurality of light beams of different wavelengths are formed.
  • the emitted light includes a first type of received laser light emitted by the wavelength conversion mechanism 4, and may further include a second type of laser light emitted by the wavelength conversion mechanism 4 and/or excitation light reflected by the wavelength conversion mechanism.
  • the dichroic mirror 22a produces the same reflection or transmission phenomenon as the excitation light for the second type of laser light, while at the same time producing a transmission or reflection phenomenon opposite to the second type of excitation light for the first type of laser light. That is, the second type of laser is similar to the wavelength of the excitation light.
  • the dichroic mirror exhibits both transmission and reflection of the second type of laser and excitation light, and the wavelength of the first type of laser is excited.
  • the difference from the wavelength of the excitation light is large, so the dichroic mirror exhibits a phenomenon opposite to the excitation light and the second type of laser light to the first type of laser light.
  • the second type of excitation light reflected by the laser and/or by the wavelength conversion mechanism is affected by the dichroic mirror 22a, and a hole is formed in the spot.
  • a diffusing sheet 6 is provided, which is at least for the second type of laser light and/or reflected by the wavelength conversion mechanism.
  • the excitation light is subjected to the scattering and homogenizing treatment to reduce the requirement for the symmetrical coincidence of the laser light, and to improve the white field color uniformity of the light source after passing through the lens.
  • the cooperation of the mirror 21a and the dichroic mirror 22a is generally based on two concepts, the first being the principle of using the dichroic mirror 22a to transmit the excitation light of one color while reflecting the other colors; The principle is to use the dichroic mirror 22a to reflect the excitation light of a certain color while transmitting the other colors. Based on the above concept, the specific structure of the mirror 21a and the dichroic mirror 22a may have many options.
  • the first mode is used to realize the function of the incident exit separation mechanism 2a.
  • FIG. 1 Please refer to FIG. 1, in which a central portion of the mirror 21a is provided with a hole, and the dichroic mirror 22a is installed in the hole.
  • the excitation light source 1 forms a color excitation light by the transmission of the dichroic mirror 22a.
  • the excitation light emitted by the excitation light source 1 is generally narrow in spectrum, such as blue light, and the dichroic mirror 22a is a dichroic mirror 22a that transmits blue to other wavelengths.
  • the blue excitation light is applied to the wavelength conversion mechanism 4 through the dichroic mirror 22a in the middle of the mirror 21a.
  • the wavelength conversion mechanism 4 may be a fluorescent color wheel or a fixed phosphor film.
  • a fluorescent color wheel is taken as an example.
  • the fluorescent color wheel 4 may have a plurality of wavelength converting materials, such as a red fluorescent region, a green fluorescent region, a blue fluorescent region, and the like, and correspondingly emit laser light such as red light, blue light, and green light.
  • blue light is equivalent to the second type of excitation light.
  • the blue light used in the exiting light may also not be emitted by the fluorescent color wheel 4, but the excited blue light directly reflected by the fluorescent color wheel 4. Or maybe both.
  • the mirror 21a and the dichroic mirror 22a are almost equivalent to one whole mirror 21a, and the reflected spot is a complete spot.
  • the excited blue light partially passes through the dichroic mirror 22a, and a portion is reflected by the mirror 21a, so that there is a matte hole in the middle of the reflected light spot.
  • the diffusing sheet 6 is disposed on the outgoing light path of the excited blue light, and the stimulated blue light is scattered and homogenized, thereby improving the white field color uniformity of the light source after passing through the lens.
  • the diffusion sheet 6 may be provided only on the outgoing light path of the laser light of the same color as the excitation light.
  • the wavelength conversion mechanism 4 is the fluorescent color wheel 4
  • the diffusion sheet 6 can be rotated in synchronization with the fluorescent color wheel 4. This synchronous rotation can be performed by fixing the diffusion sheet 6 to the fluorescent color wheel 4, or fixing the diffusion sheet 6 to another rotating mechanism to rotate in synchronization with the fluorescent color wheel 4.
  • the diffusion sheet 6 may cover the entire received laser light and generate a scattering and uniformizing treatment for all of the received laser light.
  • the diffusion sheet 6 may be fixed or may be rotated in synchronization with the fluorescent color wheel 4.
  • the embodiment further includes a lens group including at least one lens 3.
  • a lens group including at least one lens 3.
  • three lenses 3 are shown in FIG. 1, which are respectively disposed above the color wheel 4, the mirror 21a and the two directions.
  • the color mirror 22a is in the direction in which the laser light is reflected and the direction in which the other mirror 5 is reflected.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the second embodiment provides the light uniformity adjusting device of the second projection light source system.
  • the present light uniformity adjusting device differs from the first embodiment in that it further includes a spectral trimming mechanism 7 which is disposed behind the spectral finishing mechanism 7. That is, the laser beam is trimmed by the spectral trimming mechanism 7 and then incident on the diffusion sheet 6.
  • the spectral trimming mechanism 7 employs a filter.
  • the filter may be a filter that only filters the same color as the excitation light, such as the stimulated blue light described in the first embodiment; it may also be processed for all of the laser light.
  • the wavelength conversion mechanism 4 may be a fluorescent color wheel 4 or a fixed phosphor sheet.
  • the wavelength conversion mechanism 4 is the fluorescent color wheel 4
  • the filter 7 rotates in synchronization with the fluorescent color wheel 4.
  • Synchronous rotation of the filter 7 and the fluorescent color wheel 4 can be achieved by fixing the filter 7 to the fluorescent color wheel 4. It is also possible that the filter 7 is fixed to the other rotating mechanism to rotate in synchronization with the fluorescent color wheel 4.
  • diffusion sheet 6 and the filter 7 and the fluorescent color wheel 4 may also rotate in synchronization. This synchronous rotation may be achieved by fixing the diffusion sheet 6, the filter 7, and the fluorescent color wheel 4. It is also possible that the three are respectively fixed on a rotating mechanism to achieve synchronous rotation.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the third embodiment provides the light uniformity adjusting device of the third projection light source system.
  • the third embodiment differs from the second embodiment in that the mirror 21b and the dichroic mirror 22b in the incident exit separation mechanism 2b adopt another configuration.
  • the mirror 21b is provided separately from the dichroic mirror 22b, and the excitation light source 1 is incident on the wavelength conversion mechanism 4 via the reflection of the dichroic mirror 22b.
  • the mirror 21b is not provided with a hole for mounting the dichroic mirror 22b.
  • the mirror 21b is disposed above the dichroic mirror 22b.
  • the excitation light source 1 emits excitation light, such as blue light.
  • the dichroic mirror 22b is a dichroic mirror 22b that only reflects blue light but transmits light of other colors.
  • the blue excitation light is reflected by the dichroic mirror 22b, passes through the lens 3, and is struck on the color wheel.
  • the dichroic mirror 22b is almost equivalent to a transparent structure, and the reflected spot is a complete spot.
  • the stimulated blue light is partially reflected by the dichroic mirror 22b, and only a portion larger than the dichroic mirror 22b passes, so that there is a matte hole in the middle of the reflected light spot.
  • a scattering sheet 6 is disposed, which diffuses and illuminates the laser light of the same color as the excitation light to reduce the interference.
  • the requirement of laser light symmetry coincides with improving the white field color uniformity of the light source after passing through the lens.
  • the third embodiment further includes a spectral trimming mechanism 7, such as a filter 7, which is disposed behind the spectral trimming mechanism 7. That is, the laser beam is trimmed by the spectral trimming mechanism 7 and then incident on the diffusion sheet 6.
  • a spectral trimming mechanism 7, such as a filter 7, which is disposed behind the spectral trimming mechanism 7. That is, the laser beam is trimmed by the spectral trimming mechanism 7 and then incident on the diffusion sheet 6.
  • the present embodiment may also omit the spectral trimming mechanism 7, as shown in the first embodiment.
  • the fourth embodiment provides a projection device, which includes the light-emitting uniformity adjusting device according to any of the above embodiments.
  • the projection apparatus is provided with a diffusing sheet at least in the second type of exiting light path of the laser and/or the excitation light reflected by the wavelength converting mechanism, the diffusing sheet being excited by at least a second type of laser light and/or by a wavelength converting mechanism
  • the light is subjected to the scattering and homogenizing treatment to reduce the requirement for the symmetrical coincidence of the laser light, and to improve the white field color uniformity of the light source after passing through the lens.

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  • General Physics & Mathematics (AREA)
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Abstract

一种投影光源***的出光均匀性调节装置，包括激发光源（1）、入射出射分离机构（2a）、波长转换机构（4）以及散射片（6）。激发光源（1）经二向色镜（22a）反射或透射后照射到波长转换机构（4），形成若干不同波长的出射光，该出射光包括第二类受激光和/或经波长转换机构（4）反射的激发光，二向色镜（22a）对第二类受激光产生与激发光相同的反射或透射现象，该第二类受激光和/或被反射的激发光在出射时受到二向色镜（22a）的影响，在其光斑形成孔洞。因此，至少在第二类受激光和/或被反射的激发光的出射光路上设置有散射片（6），该散射片（6）至少对第二类受激光和/或被反射的激发光进行散射匀光处理，降低对受激光的光对称重合的要求，改善光源（1）的出光经过镜头后的白场颜色均匀性。

Description

投影光源***的出光均匀性调节装置及投影设备 技术领域
本申请涉及投影光源***，尤其是涉及投影光源***中对受激光的出光均匀性进行调节的装置。
 背景技术
目前，采用波长转换原理的光源都会有激发光和受激光分离的问题。一种常用的分离方法是使用带孔洞的入射出射分离机构，如反射镜，激发光通过孔洞打在波长转换机构上，波长转换材料将激发光转换成受激光。受激光被入射出射分离机构反射从而与激发光分离。但是由于入射出射分离机构上有孔洞，入射出射光会由于孔洞不能完全分离而损失。为了减小损失，可以在入射出射分离机构的孔洞上填上二向色镜。由于一般激发光的光谱比较窄，而受激光的光谱与激发光有明显区别，二向色镜可以把孔洞处大部分受激光与由波长转换机构反射的激发光分离开，只有少部分与激发光光谱接近的受激光会损失。
 技术问题
但该方案的缺点是，在波长转换机构发出的受激光中，与射入波长转换机构的激发光同色的受激光（光谱接近）与二向色镜对应的部分会损失，从而在该受激光的光斑上形成孔洞，这个孔洞必须在光斑的正中心，而且形状完全对称，否则会造成蓝光经过镜头后在屏幕上分布不均匀。该孔洞是否在光斑的正中心，形状是否对称取决于反射镜和二向色镜是否在同一平面内，是否是个理想平面，没有弧度等，这对制造工艺提出了很高要求，现实中往往难以满足。
 技术解决方案
本申请提供一种新型的投影光源***的出光均匀性调节装置以及采用了这种调节装置的投影设备，用以改善受激光的出光均匀性。
本申请提供的出光均匀性调节装置，包括：
激发光源，用于发出激发光；
入射出射分离机构，其包括反射镜和二向色镜；
波长转换机构，所述激发光经二向色镜反射或透射后照射到波长转换机构，经所述波长转换机构作用后，形成若干不同波长的出射光，所述出射光包括由波长转换机构发出的第一类受激光，所述出射光还包括波长转换机构发出的第二类受激光和/或经波长转换机构反射的激发光，所述二向色镜对第二类受激光产生与激发光相同的反射或透射现象，同时对第一类受激光产生相反于第二类激发光的透射或反射现象；
以及散射片，至少在第二类受激光和/或由波长转换机构反射的激发光的出射光路上设置有散射片，所述散射片至少对第二类受激光和/或由波长转换机构反射的激发光进行散射匀光处理。
作为所述出光均匀性调节装置的进一步改进，还包括光谱修整机构，所述散射片设置在光谱修整机构之后。
作为所述出光均匀性调节装置的进一步改进，所述波长转换机构为荧光色轮，所述光谱修整机构为滤光片，所述滤光片与荧光色轮同步转动。
作为所述出光均匀性调节装置的进一步改进，所述散射片与滤光片以及荧光色轮同步转动。
作为所述出光均匀性调节装置的进一步改进，所述滤光片与荧光色轮固定，随荧光色轮一体转动。
作为所述出光均匀性调节装置的进一步改进，所述滤光片与散射片固定为一体结构。
作为所述出光均匀性调节装置的进一步改进，所述散射片为兼具散光和滤光功能的散光滤光片。
作为所述出光均匀性调节装置的进一步改进，所述反射镜的中部设有孔洞，所述二向色镜安装在所述孔洞中。
作为所述出光均匀性调节装置的进一步改进，所述反射镜与二向色镜分离设置，所述激发光源经二向色镜的反射作用射向波长转换机构。
本申请提供的投影设备，包括如上述任一项所述的出光均匀性调节装置。
 有益效果
本申请的有益效果是：
本申请提供的调节装置，其包括激发光源、入射出射分离机构、波长转换机构以及散射片。该激发光源经入射出射分离机构中的二向色镜反射或透射后照射到波长转换机构，经波长转换机构作用后，形成若干不同波长的出射光，该出射光包括由波长转换机构发出的第一类受激光，还包括波长转换机构发出的第二类受激光和/或经波长转换机构反射的激发光，二向色镜对第二类受激光产生与激发光相同的反射或透射现象，出射时受到二向色镜的影响，在其光斑形成孔洞。因此，至少在第二类受激光和/或由波长转换机构反射的激发光的出射光路上设置有散射片，该散射片至少对第二类受激光和/或由波长转换机构反射的激发光进行散射匀光处理，降低对受激光的光对称重合的要求，改善光源的出光经过镜头后的白场颜色均匀性。
 附图说明
图1为本申请出光均匀性调节装置第一种实施例的结构示意简图；
图2为本申请出光均匀性调节装置第二种实施例的结构示意简图；
图3为本申请出光均匀性调节装置第三种实施例的结构示意简图。
 本发明的最佳实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明。本申请可以以多种不同的形式来实现，并不限于本实施例所描述的实施方式。提供以下具体实施方式的目的是便于对本申请公开内容更清楚透彻的理解，其中上、下、左、右等指示方位的字词仅是针对所示结构在对应附图中位置而言。
然而，本领域的技术人员可能会意识到其中的一个或多个的具体细节描述可以被省略，或者还可以采用其他的方法、组件或材料。在一些例子中，一些实施方式并没有描述或没有详细的描述。
此外，本文中记载的技术特征、技术方案还可以在一个或多个实施例中以任意合适的方式组合。对于本领域的技术人员来说，易于理解与本文提供的实施例有关的方法的步骤或操作顺序还可以改变。因此，附图和实施例中的任何顺序仅仅用于说明用途，并不暗示要求按照一定的顺序，除非明确说明要求按照某一顺序。
本文中为部件所编序号本身，例如“第一”、“第二”等，仅用于区分所描述的对象，不具有任何顺序或技术含义。而本申请所说“连接”、“联接”，如无特别说明，均包括直接和间接连接（联接）。
实施例一：
本实施例一提供一种投影光源***的出光均匀性调节装置，其可改善投影光源***中受激光的出光均匀性。
请参考图1，该出光均匀性调节装置包括激发光源1、入射出射分离机构2a、波长转换机构4以及散射片6。
该激发光源1用于发出激发光。入射出射分离机构2a包括反射镜21a和二向色镜22a，通过反射镜21a和二向色镜22a的配合实现激发光的入射以及受激光和/或被反射的激发光的出射。
该激发光经二向色镜22a反射或透射后照射到波长转换机构4，经波长转换机构4作用后，形成若干不同波长的出射光。该出射光包括由波长转换机构4发出的第一类受激光，还可以包括波长转换机构4发出的第二类受激光和/或经波长转换机构反射的激发光。二向色镜22a对第二类受激光产生与激发光相同的反射或透射现象，同时对第一类受激光产生相反于第二类激发光的透射或反射现象。即第二类受激光与激发光的波长是相近的，这种相近是指二向色镜对该第二类受激光和激发光均同时表现为透射或者反射，而第一类受激光的波长与激发光的波长相差较大，因此二向色镜对该第一类受激光表现为与激发光和第二类受激光相反的现象。
其中，第二类受激光和/或经波长转换机构反射的激发光受到二向色镜22a的影响，在其光斑形成孔洞。因此，至少在第二类受激光和/或由波长转换机构反射的激发光的出射光路上设置有散射片6，该散射片6至少对第二类受激光和/或由波长转换机构反射的激发光进行散射匀光处理，降低对受激光的光对称重合的要求，改善光源的出光经过镜头后的白场颜色均匀性。
具体地，反射镜21a和二向色镜22a的配合通常是基于两种构思，第一种是利用二向色镜22a对某一颜色激发光的透射同时对其他颜色进行反射的原理；第二种是利用二向色镜22a对某一颜色激发光的反射同时对其他颜色进行透射的原理。基于以上构思，反射镜21a和二向色镜22a的具体结构可能有很多种的选择。
本实施例一采用第一种方式来实现入射出射分离机构2a的功能。
请参考图1，其中，反射镜21a的中部设有孔洞，二向色镜22a安装在孔洞中。激发光源1经二向色镜22a的透射作用形成颜色的激发光。
激发光源1发出的激发光一般光谱较窄，例如蓝光，本二向色镜22a为透蓝反其他波长的二向色镜22a。蓝激发光透过反射镜21a中间的二向色镜22a打在波长转换机构4上。
该波长转换机构4可能为是荧光色轮，也可能是固定荧光粉片。本实施例一以荧光色轮为例。
该荧光色轮4上可能有多段波长转换材料，例如红光荧光区、绿光荧光区和蓝光荧光区等等，相应的激发出红光、蓝光和绿光等受激光。
此处，除了蓝光外的其他颜色的光就相当于第一类受激光，而蓝光就相当于第二类激发光。在其他实施例中，出射光中所采用的蓝光也可能不是由荧光色轮4发出，而是荧光色轮4直接反射的激发蓝光。或者，也可能两者兼有。
其中，除了蓝光外，其他颜色的光都会被反射镜21a和二向色镜22a反射，反射镜21a和二向色镜22a几乎等效一个整片反射镜21a，反射后的光斑是一个完整光斑。而受激蓝光则有部分会透过二向色镜22a，一部分被反射镜21a反射，这样蓝光被反射的光斑中间有个无光的孔洞。
为了解决不均匀的问题，在散射片6设置在受激蓝光的出射光路上，对该受激蓝光散射匀光处理，从而改善光源的出光经过镜头后的白场颜色均匀性。
当然，可以仅在与激发光同色的受激光的出射光路上设置有散射片6。当波长转换机构4为荧光色轮4时，可以使散射片6与荧光色轮4同步转动。该同步转动可以通过将散射片6固定荧光色轮4，或者将散射片6固定在另一转动机构上与荧光色轮4同步转动。
此外，散射片6也可以是覆盖了整个受激光，对所有受激光均产生散射匀光处理。在这种情况下，散射片6可以是固定的，也可以是与荧光色轮4同步转动的。
请继续参考图1，本实施例还包括透镜组，该透镜组包括至少一个透镜3，例如图1中所示为透镜3为三个，分别设置在色轮4上方，反射镜21a和二向色镜22a对受激光的反射方向上以及另一反射镜5的反射方向上。
实施例二：
本实施例二提供第二种投影光源***的出光均匀性调节装置。
本出光均匀性调节装置与实施例一的区别在于，还包括光谱修整机构7，该散射片6设置在光谱修整机构7之后。即受激光经光谱修整机构7修整后再射入散射片6。
请参考图2，在本实施例中，光谱修整机构7采用滤光片。该滤光片可以是仅对与激发光同色的受激光进行滤光处理，例如在实施例一所述的受激蓝光；也可能针对所有的受激光进行处理。
该波长转换机构4可能为是荧光色轮4，也可能是固定荧光粉片。当波长转换机构4为荧光色轮4时，该滤光片7与荧光色轮4同步转动。
滤光片7与荧光色轮4的同步转动可以通过将滤光片7与荧光色轮4固定来实现。也可能是滤光片7固定在另一转动机构上与荧光色轮4同步转动。
进一步地，散射片6与滤光片7以及荧光色轮4也可能是同步转动。该同步转动可能是将散射片6、滤光片7与荧光色轮4固定来实现。也可能是三者分别固定在一转动机构上实现同步转动。
为了节省空间，简化结构，也可能是直接将散射片6与滤光片7固定为一体结构。
此外，还可能是直接将散射片6利用现有技术加工成兼具散光和滤光功能的散光滤光片7。
实施例三：
本实施例三提供第三种投影光源***的出光均匀性调节装置。
本实施例三与实施例二的区别在于：入射出射分离机构2b中的反射镜21b和二向色镜22b采用了另一种结构。
其中，该反射镜21b与二向色镜22b分离设置，激发光源1经二向色镜22b的反射作用射向波长转换机构4。
具体地，请参考图1，反射镜21b不设置用于安装二向色镜22b的孔洞。该反射镜21b设置在二向色镜22b的上方。
激发光源1发出激发光，例如为蓝光。二向色镜22b为只反蓝光但透射其他颜色光的二向色镜22b。蓝激发光被二向色镜22b反射，经透镜3后，打在色轮上。色轮上可能有多段波长转换材料，例如红光荧光区、绿光荧光区和蓝光荧光区等等，相应的激发出红光、蓝光和绿光。其中，除了蓝光外，其他颜色的光都会透过二向色镜22b，二向色镜22b几乎等效透明结构，反射后的光斑是一个完整光斑。而受激蓝光则有部分被二向色镜22b反射，只有比二向色镜22b大的部分通过，这样蓝光被反射的光斑中间有个无光的孔洞。
采用与实施例一和二近似的原理，至少在与激发光同色的受激光的出射光路上设置有散射片6，该散射片6对与激发光同色的受激光进行散射匀光，降低对受激光的光对称重合的要求，改善光源的出光经过镜头后的白场颜色均匀性。
本实施例三还包括光谱修整机构7，如滤光片7，该散射片6设置在光谱修整机构7之后。即受激光经光谱修整机构7修整后再射入散射片6。
同样地，本方案也可能会省略光谱修整机构7，如实施例一所示。
实施例四
本实施例四提供一种投影设备，该投影设备包括如上述任一实施例所述的出光均匀性调节装置。
该投影设备至少在第二类受激光和/或由波长转换机构反射的激发光的出射光路上设置有散射片，该散射片至少对第二类受激光和/或由波长转换机构反射的激发光进行散射匀光处理，降低对受激光的光对称重合的要求，改善光源的出光经过镜头后的白场颜色均匀性。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换。

Claims (10)

1. 一种投影光源***的出光均匀性调节装置,其特征在于，包括：
激发光源，用于发出激发光；
入射出射分离机构，其包括反射镜和二向色镜；
波长转换机构，所述激发光经二向色镜反射或透射后照射到波长转换机构，经所述波长转换机构作用后，形成若干不同波长的出射光，所述出射光包括由波长转换机构发出的第一类受激光，所述出射光还包括波长转换机构发出的第二类受激光和/或经波长转换机构反射的激发光，所述二向色镜对第二类受激光产生与激发光相同的反射或透射现象，同时对第一类受激光产生相反于第二类激发光的透射或反射现象；
以及散射片，至少在第二类受激光和/或由波长转换机构反射的激发光的出射光路上设置有散射片，所述散射片至少对第二类受激光和/或由波长转换机构反射的激发光进行散射匀光处理。
2. 如权利要求1所述的出光均匀性调节装置，其特征在于，还包括光谱修整机构，所述散射片设置在光谱修整机构之后。
3. 如权利要求2所述的出光均匀性调节装置，其特征在于，所述波长转换机构为荧光色轮，所述光谱修整机构为滤光片，所述滤光片与荧光色轮同步转动。
4. 如权利要求3所述的出光均匀性调节装置，其特征在于，所述散射片与滤光片以及荧光色轮同步转动。
5. 如权利要求3所述的出光均匀性调节装置，其特征在于，所述滤光片与荧光色轮固定，随荧光色轮一体转动。
6. 如权利要求4所述的出光均匀性调节装置，其特征在于，所述滤光片与散射片固定为一体结构。
7. 如权利要求1所述的出光均匀性调节装置，其特征在于，所述散射片为兼具散光和滤光功能的散光滤光片。
8. 如权利要求1所述的出光均匀性调节装置，其特征在于，所述反射镜的中部设有孔洞，所述二向色镜安装在所述孔洞中。
9. 如权利要求1所述的出光均匀性调节装置，其特征在于，所述反射镜与二向色镜分离设置，所述激发光源经二向色镜的反射作用射向波长转换机构。
10. 一种投影设备，其特征在于，包括如权利要求1-9任一项所述的出光均匀性调节装置。
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