WO2019015297A1 - Light homogenizing device, light source system and projection device - Google Patents

Light homogenizing device, light source system and projection device Download PDF

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Publication number
WO2019015297A1
WO2019015297A1 PCT/CN2018/074754 CN2018074754W WO2019015297A1 WO 2019015297 A1 WO2019015297 A1 WO 2019015297A1 CN 2018074754 W CN2018074754 W CN 2018074754W WO 2019015297 A1 WO2019015297 A1 WO 2019015297A1
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Prior art keywords
light
homogenizing
rod body
incident
closed cavity
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PCT/CN2018/074754
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French (fr)
Chinese (zh)
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侯海雄
唐晓峰
李屹
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深圳市光峰光电技术有限公司
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Publication of WO2019015297A1 publication Critical patent/WO2019015297A1/en

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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 utility model relates to the field of projection technology, in particular to a light homogenizing device, a light source system and a projection device.
  • the homogenizing rod used on the market usually has a diffusing piece in front of the light-input end, which makes the laser spot from the light-shaping rod more uniform, so that the laser spot on the fluorescent color wheel is more uniform, and finally The excitation efficiency of the fluorescent color wheel is higher, that is, the optical power output by the light source is higher.
  • the utility model can provide an effective reduction The light homogenizing device, the light source system and the projection device of the light rod damage rate.
  • a light homogenizing device includes a closed cavity, and a scattering element and a light homogenizing rod body disposed in the closed cavity body, wherein opposite ends of the light homogenizing rod body are respectively light entrance ends and a light-emitting end, the closed cavity includes a light-incident side and a light-emitting side respectively capable of transmitting light and corresponding to the light-incident end and the light-emitting end of the light-smoothing rod body, and the scattering element is disposed in the closed cavity The light side is between the light incident end of the light homogenizing rod body.
  • a light transmitting film is disposed on both the light incident side and the light exiting side of the closed cavity.
  • the light transmissive film is an antireflection film.
  • the homogenizing rod body is a hollow structure.
  • the inner surface of the portion of the light-dancing rod body between the light-incident end and the light-emitting end is formed with an array of curved surfaces, and the surface of the curved surface portion is plated to the surface of the light-receiving rod body.
  • the homogenizing rod body has a solid structure.
  • an outer surface of the portion of the light-dancing rod body between the light-incident end and the light-emitting end is formed with an array of curved surfaces, and the surface of the curved surface portion is plated to the surface of the outside of the light-emitting rod body.
  • the curved surface array is a compound eye or a cylindrical body extending in the optical path direction.
  • a light source system comprising: an illuminator and a light homogenizing device according to any one of the preceding claims, wherein a light beam emitted from the illuminant is incident from a light incident side of the closed cavity, and is sequentially scattered by the scattering element. After the homogenization of the homogenizing rod body, the light is emitted from the light emitting side of the closed cavity.
  • a projection apparatus comprising the light homogenizing device of any of the above.
  • the present invention provides the light homogenizing device, the light source system, and the projection device.
  • the light homogenizing device provided in the embodiment provides the scattering element and the light homogenizing rod body in the closed cavity. Therefore, the dust can be effectively dustproof, and the scattering element and the light homogenizing rod body can be directly contacted with the outside, and the service life of the light homogenizing device and the light source system and the projection device using the light homogenizing device is prolonged.
  • FIG. 1 is a side view showing a structure of a light homogenizing device according to an embodiment of the present invention.
  • FIG. 2 is a schematic perspective view of a homogenizing rod body according to another embodiment of the present invention.
  • FIG. 1 is a schematic side view of a light homogenizing device 100 according to an embodiment of the present invention.
  • the light homogenizing device 100 includes a closed cavity 150 and a scattering element 140 and a light homogenizing rod 120 disposed in the closed cavity 150.
  • the closed cavity 150 includes a light incident side 151 and a light emitting side. 153, the opposite ends of the light-emitting rod body 120 are respectively the light-incident end 121 and the light-emitting end 122, and the light-incident side 151 and the light-emitting side 153 are respectively connected to the light-incident end 121 and the light-emitting end 122.
  • the scattering element 140 is disposed between the light incident side 151 and the light incident end 121.
  • the material of the light homogenizing rod 120 is a light transmissive medium, including but not limited to glass and plastic.
  • the light-emitting rod body 120 may be a solid structure, and an outer surface of the portion between the light-incident end 121 and the light-emitting end 122 of the light-dancing rod 120 is provided with a reflective film to be incident. Light reflects.
  • the light-emitting rod body 120 may also be a hollow structure, and the light-emitting end 122 and the light-incident end 121 both form an opening.
  • An inner surface of a portion between the light incident end 121 and the light exit end 122 of the light homogenizing rod 120 is provided with a reflective film to reflect incident light.
  • the scattering element 140 is a light transmissive medium layer doped with scattering particles or diffusion particles, or the scattering element 140 is a sheet of a diffusion sheet material.
  • the scattering element 140 is disposed along the optical axis direction and perpendicular to the optical axis, and the longitudinal direction of the uniform light rod body 120 is the optical axis direction.
  • the light incident side 151 and the light exiting side 153 of the closed cavity 150 can transmit light.
  • the light-incident side 151 and the light-emitting side 153 are provided with a transparent film, such as an anti-reflection film (also referred to as an anti-reflection film), and the thickness of the transparent film can be designed as a single layer or two according to actual needs. Above the layer.
  • the incident light is not focused on the light transmissive film, and the optical power density on the light transmissive film is greatly reduced, thereby reducing the risk of the light transmissive film being burned out.
  • the light incident side 151 and the light exiting side 153 can also be provided with other optical films capable of transmitting light.
  • the light homogenizing device 100 is used for aligning incident light and can be applied to a light source system and a projection device.
  • the light source system includes an illuminator and the light homogenizing device 100, and a light beam emitted from the illuminating body is incident on the scattering element 140 from the light incident side 151, and is homogenized by the homogenizing rod body 120.
  • the light exiting side 153 of the closed cavity 150 exits.
  • the projection device may apply the light homogenizing device 100 to perform light homogenization, or apply a light source system using the light homogenizing device 100.
  • the illuminant can be a direct illuminant (such as a laser diode) or an indirect illuminant that emits fluorescence.
  • the light homogenizing device 100 provided in this embodiment disposes the scattering element 140 and the light homogenizing rod body 120 in the closed cavity 150, so that the dustproof member can be effectively dustproof, and the scattering element 140 and the scattering element are avoided.
  • the homogenizing rod body 120 directly contacts the outside world, prolonging the service life of the light homogenizing device 100 and the light source system and the projection device using the homogenizing device 100.
  • FIG. 2 is a schematic perspective structural view of a light homogenizing rod 220 according to another embodiment of the present invention.
  • the light-sharing device (not shown) in this embodiment is compared with the light-smoothing device 100.
  • the main difference is that the light-receiving rod 220 is located at the light-incident end 221 and the light-emitting end (not shown).
  • a curved surface portion array 223 is formed on the outer surface of the portion between the portions.
  • the curved surface array 223 is provided with a plurality of cylindrical bodies extending in the optical path direction.
  • a surface of the curved surface portion array 223 facing the outside of the uniform light rod body 220 is plated with a reflective film for reflecting light.
  • the curved portion array 223 may be provided with a plurality of compound eyes extending in the direction of the optical path.
  • the homogenizing rod body 220 is a cylindrical solid structure. It can be understood that in other embodiments, the homogenizing rod 220 can also be a square prism or a solid structure of other shapes.
  • the light beam After the light beam enters the homogenizing rod body 220, part of the small-angle incident light directly exits through the homogenizing rod body 220, and incident light of other angles is transmitted inside the homogenizing rod body 220 to reach the curved surface portion array 223. s surface. Since the surface of the curved surface portion array 223 is curved and the reflective film is plated, the light beam is reflected on the surface of the curved surface portion array 223, and the direction of the reflection is determined by the curvature of the curved surface portion array 223 and the incident angle of the light beam. After the beam is reflected by the curved surface, the direction of the beam changes, and the number of reflections increases. In the case of the equal length and cross-sectional area of the homogenizing rod body 220, the more the number of reflections, the better the uniformity effect, and the better the uniformity of the spot distribution.
  • the cross-section of the light-incident end 221 and the light-emitting end of the light-dancing rod 220 is polygonal, and its size is similar to that of the external light source.
  • the cross-sectional area of the light incident end 221 may be larger than the light emitting area of the external light source under the condition that the amount of optical expansion is allowed to become large.
  • the homogenizing rod body 220 in the light homogenizing device is a hollow structure, and the light-incident end 221 and the light-emitting end (not shown) form an opening.
  • the illuminating rod body 220 is disposed on the inner surface between the light incident end 221 and the light exiting end with a curved surface array 223.
  • the curved surface array 223 is provided with a plurality of compound eyes or cylinders extending in the optical path direction.
  • a surface of the curved surface portion array 223 facing the inside of the uniform light rod body 220 is plated with a reflective film for reflecting light.
  • the light beam is reflected on the surface of the curved surface portion array 223, and the direction of the reflection is determined by the curvature of the curved surface portion array 223 and the incident angle of the light beam. After the beam is reflected by the curved surface, the direction of the beam changes, and the number of reflections increases. In the case of the equal length and cross-sectional area of the homogenizing rod body 220, the more the number of reflections, the better the uniformity effect, and the better the uniformity of the spot distribution.
  • the present embodiment is the same as the first embodiment in that the light homogenizing device is disposed in the closed cavity with the scattering element and the light homogenizing rod 220, thereby effectively preventing dust and avoiding the scattering element. Direct contact with the outside of the homogenizing rod body prolongs the service life of the light homogenizing device and the light source system and the projection device using the homogenizing device.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A light homogenizing device (100), a light source system and a projection device. The light homogenizing device (100) comprises a closed cavity (150), and a scattering element (140) and a light homogenizing rod body (120) which are provided in the closed cavity (150); two opposite ends of the light homogenizing rod body (120) are respectively a light-incident end (121) and a light-emitting end (122); the closed cavity (150) comprises a light-incident side (151) and a light-emitting side (153) which are light-transmissive and respectively correspond to the light-incident end (121) and the light-emitting end (122) of the light homogenizing rod body (120); the scattering element (140) is provided on the light-incident end (121). In the light homogenizing device (100), the scattering element (140) and the light homogenizing rod body (120) are provided in the closed cavity (150), so as to effectively prevent dust, preventing the scattering element (140) and the light homogenizing rod body (120) from being in direct contact with the outside, prolonging the service life of the light homogenizing device (100) and of the light source system and the projection device that use the light homogenizing device (100).

Description

匀光装置、光源系统及投影设备Leveling device, light source system and projection device 技术领域Technical field
本实用新型涉及投影技术领域，尤其涉及一种匀光装置、光源系统及投影设备。The utility model relates to the field of projection technology, in particular to a light homogenizing device, a light source system and a projection device.
背景技术Background technique
本部分旨在为权利要求书中陈述的本实用新型的具体实施方式提供背景或上下文。此处的描述不因为包括在本部分中就承认是现有技术。This section is intended to provide a context or context for the specific embodiments of the invention set forth in the claims. The description herein is not admitted to be prior art as it is included in this section.
目前市场上使用的匀光棒在其入光端前面通常都加入一片散射片，这样可以让从匀光棒出来的激光光斑更加均匀，从而使打在荧光色轮上的激光光斑更加均匀，最终使荧光色轮的激发效率更高，即光源输出的光功率更高。At present, the homogenizing rod used on the market usually has a diffusing piece in front of the light-input end, which makes the laser spot from the light-shaping rod more uniform, so that the laser spot on the fluorescent color wheel is more uniform, and finally The excitation efficiency of the fluorescent color wheel is higher, that is, the optical power output by the light source is higher.
然而，匀光棒与散射片之间有一狭小间隙，当空气中的灰尘或杂质掉进此间隙时，由于此间隙的面积较小，导致激光功率密度和灰尘杂质分子浓度较高，灰尘或杂质分子在光源长时间工作环境下将烧坏散光片和匀光棒。However, there is a narrow gap between the homogenizing rod and the diffusing sheet. When dust or impurities in the air fall into the gap, the laser power density and dust impurity molecular concentration are high due to the small area of the gap, dust or impurities. The molecules will burn out the astigmatism sheet and the homogenizing rod under the long-term working environment of the light source.
实用新型内容Utility model content
为解决现有技术中散射片与匀光棒之间存在间隙导致所述空隙中进入灰尘，进而烧坏所述散射片和所述匀光棒的技术问题，本实用新型提供一种可以有效降低所述匀光棒损坏率的匀光装置、光源系统及投影设备。In order to solve the technical problem that the gap between the diffusing sheet and the light collecting rod in the prior art causes dust to enter the gap and burn out the diffusing sheet and the light collecting rod, the utility model can provide an effective reduction The light homogenizing device, the light source system and the projection device of the light rod damage rate.
一种匀光装置，所述匀光装置包括一封闭腔体、及设置于所述封闭腔体内的散射元件与匀光棒体，所述匀光棒体的相对两端分别为入光端和出光端，所述封闭腔体包括能够透光且与所述匀光棒体的入光 端和出光端分别对应的入光侧和出光侧，所述散射元件设于所述封闭腔体的入光侧与所述匀光棒体的入光端之间。A light homogenizing device, the light homogenizing device includes a closed cavity, and a scattering element and a light homogenizing rod body disposed in the closed cavity body, wherein opposite ends of the light homogenizing rod body are respectively light entrance ends and a light-emitting end, the closed cavity includes a light-incident side and a light-emitting side respectively capable of transmitting light and corresponding to the light-incident end and the light-emitting end of the light-smoothing rod body, and the scattering element is disposed in the closed cavity The light side is between the light incident end of the light homogenizing rod body.
进一步地，所述封闭腔体的入光侧与出光侧均设置有透光膜片。Further, a light transmitting film is disposed on both the light incident side and the light exiting side of the closed cavity.
进一步地，所述透光膜片为增透膜。Further, the light transmissive film is an antireflection film.
进一步地，所述匀光棒体为空心结构。Further, the homogenizing rod body is a hollow structure.
进一步地，所述匀光棒体位于所述入光端与所述出光端之间的部位的内表面形成有曲面部阵列，所述曲面部阵列面向所述匀光棒体内部的表面镀设有用于对光进行反射的反射膜。Further, the inner surface of the portion of the light-dancing rod body between the light-incident end and the light-emitting end is formed with an array of curved surfaces, and the surface of the curved surface portion is plated to the surface of the light-receiving rod body. There is a reflective film for reflecting light.
进一步地，所述匀光棒体为实心结构。Further, the homogenizing rod body has a solid structure.
进一步地，所述匀光棒体位于所述入光端与所述出光端之间的部位的外表面形成有曲面部阵列，所述曲面部阵列面向所述匀光棒体外部的表面镀设有用于对光进行反射的反射膜。Further, an outer surface of the portion of the light-dancing rod body between the light-incident end and the light-emitting end is formed with an array of curved surfaces, and the surface of the curved surface portion is plated to the surface of the outside of the light-emitting rod body. There is a reflective film for reflecting light.
进一步地，所述曲面部阵列为沿光路方向延伸的复眼或柱面体。Further, the curved surface array is a compound eye or a cylindrical body extending in the optical path direction.
一种光源系统，包括发光体及如上所述任意一项所述的匀光装置，所述发光体发出的光束自所述封闭腔体的入光侧入射，依次经所述散射元件散射、所述匀光棒体的匀光后自所述封闭腔体的出光侧出射。A light source system comprising: an illuminator and a light homogenizing device according to any one of the preceding claims, wherein a light beam emitted from the illuminant is incident from a light incident side of the closed cavity, and is sequentially scattered by the scattering element. After the homogenization of the homogenizing rod body, the light is emitted from the light emitting side of the closed cavity.
一种投影设备，包括如上所述任意一项所述的匀光装置。A projection apparatus comprising the light homogenizing device of any of the above.
本实用新型提供所述匀光装置、所述光源系统及所述投影设备，本实施例提供的所述匀光装置将所述散射元件与所述匀光棒体设置于所述封闭腔体内，从而可以有效地防尘，避免了所述散射元件与所述匀光棒体直接与外界接触，延长了所述匀光装置及采用所述匀光装置的光源系统及投影设备的使用寿命。The present invention provides the light homogenizing device, the light source system, and the projection device. The light homogenizing device provided in the embodiment provides the scattering element and the light homogenizing rod body in the closed cavity. Therefore, the dust can be effectively dustproof, and the scattering element and the light homogenizing rod body can be directly contacted with the outside, and the service life of the light homogenizing device and the light source system and the projection device using the light homogenizing device is prolonged.
附图说明DRAWINGS
图1为本实用新型一实施例提供的匀光装置的侧视结构示意图。FIG. 1 is a side view showing a structure of a light homogenizing device according to an embodiment of the present invention.
图2为本实用新型另一实施例提供的匀光棒体的立体结构示意图。2 is a schematic perspective view of a homogenizing rod body according to another embodiment of the present invention.
主要元件符号说明Main component symbol description
匀光装置Homogenizer 100100
匀光棒体 Uniform rod 120、220120, 220
入光端Into the light end 121、221121, 221
出光端 Light end 122122
曲面部阵列 Surface array 223223
散射元件Scattering element 140140
封闭腔体Closed cavity 150150
入光侧 Light side 151151
出光侧 Light exit side 153153
如下具体实施方式将结合上述附图进一步说明本实用新型。The present invention will be further described in conjunction with the above drawings in the following detailed description.
具体实施方式Detailed ways
请参阅图1，为本实用新型一实施例提供的匀光装置100的侧视结构示意图。匀光装置100包括一封闭腔体150、及设置于所述封闭腔体150内的散射元件140与匀光棒体120，所述封闭腔体150包括能够透光的入光侧151与出光侧153，所述匀光棒体120的相对两端分别为入光端121和出光端122，所述入光侧151与所述出光侧153分别与所述入光端121和所述出光端122对应。所述散射元件140设于所述入光侧151与所述入光端121之间。Please refer to FIG. 1 , which is a schematic side view of a light homogenizing device 100 according to an embodiment of the present invention. The light homogenizing device 100 includes a closed cavity 150 and a scattering element 140 and a light homogenizing rod 120 disposed in the closed cavity 150. The closed cavity 150 includes a light incident side 151 and a light emitting side. 153, the opposite ends of the light-emitting rod body 120 are respectively the light-incident end 121 and the light-emitting end 122, and the light-incident side 151 and the light-emitting side 153 are respectively connected to the light-incident end 121 and the light-emitting end 122. correspond. The scattering element 140 is disposed between the light incident side 151 and the light incident end 121.
所述匀光棒体120的材质为透光介质，所述透光介质包括但不限于玻璃及塑料。The material of the light homogenizing rod 120 is a light transmissive medium, including but not limited to glass and plastic.
在一种实施例中，所述匀光棒体120可以为实心结构，所述匀光棒体120的入光端121与出光端122之间的部位的外表面设置有反射膜，以对入射光进行反射。在其他实施例中，匀光棒体120还可以是空心结构，出光端122与入光端121均形成开口。所述匀光棒体120的入光端121与出光端122之间的部位的内表面设置有反射膜以对入射光进行反射。In an embodiment, the light-emitting rod body 120 may be a solid structure, and an outer surface of the portion between the light-incident end 121 and the light-emitting end 122 of the light-dancing rod 120 is provided with a reflective film to be incident. Light reflects. In other embodiments, the light-emitting rod body 120 may also be a hollow structure, and the light-emitting end 122 and the light-incident end 121 both form an opening. An inner surface of a portion between the light incident end 121 and the light exit end 122 of the light homogenizing rod 120 is provided with a reflective film to reflect incident light.
本实施例中，所述散射元件140为掺杂有散射粒子或扩散粒子的 透光介质层，或者，所述散射元件140为扩散片材质的片材。所述散射元件140沿光轴方向设置且与光轴垂直，所述匀光棒体120的长度方向为所述光轴方向。In this embodiment, the scattering element 140 is a light transmissive medium layer doped with scattering particles or diffusion particles, or the scattering element 140 is a sheet of a diffusion sheet material. The scattering element 140 is disposed along the optical axis direction and perpendicular to the optical axis, and the longitudinal direction of the uniform light rod body 120 is the optical axis direction.
在本实施例中，所述封闭腔体150的入光侧151与出光侧153能够透光。具体地，所述入光侧151与所述出光侧153设置有透光膜片，比如增透膜(又称减反膜)，透光膜片的厚度可以根据实际需要设计为单层或两层以上。入射光并非聚焦于所述透光膜片上，在所述透光膜片上的光功率密度大大降低，从而降低了所述透光膜片被烧坏的风险。可以理解的是，所述入光侧151与所述出光侧153还可以设置具有能够透光的其他光学膜片。In this embodiment, the light incident side 151 and the light exiting side 153 of the closed cavity 150 can transmit light. Specifically, the light-incident side 151 and the light-emitting side 153 are provided with a transparent film, such as an anti-reflection film (also referred to as an anti-reflection film), and the thickness of the transparent film can be designed as a single layer or two according to actual needs. Above the layer. The incident light is not focused on the light transmissive film, and the optical power density on the light transmissive film is greatly reduced, thereby reducing the risk of the light transmissive film being burned out. It can be understood that the light incident side 151 and the light exiting side 153 can also be provided with other optical films capable of transmitting light.
本实施例提供的匀光装置100用于对入射光线进行匀光并能够应用于光源系统及投影设备。所述光源系统包括发光体及所述匀光装置100，所述发光体发出的光束自所述入光侧151入射至所述散射元件140，经所述匀光棒体120的匀光后自所述封闭腔体150的出光侧153出射。所述投影设备可以应用所述匀光装置100进行匀光，或应用采用所述匀光装置100的光源系统。可以理解，发光体可以为直接发光体(如激光二极管)，也可以为发出荧光的间接发光体。The light homogenizing device 100 provided in this embodiment is used for aligning incident light and can be applied to a light source system and a projection device. The light source system includes an illuminator and the light homogenizing device 100, and a light beam emitted from the illuminating body is incident on the scattering element 140 from the light incident side 151, and is homogenized by the homogenizing rod body 120. The light exiting side 153 of the closed cavity 150 exits. The projection device may apply the light homogenizing device 100 to perform light homogenization, or apply a light source system using the light homogenizing device 100. It can be understood that the illuminant can be a direct illuminant (such as a laser diode) or an indirect illuminant that emits fluorescence.
本实施例提供的所述匀光装置100将所述散射元件140与所述匀光棒体120设置于所述封闭腔体150内，从而可以有效地防尘，避免了所述散射元件140与所述匀光棒体120直接与外界接触，延长了所述匀光装置100及采用所述匀光装置100的光源系统及投影设备的使用寿命。The light homogenizing device 100 provided in this embodiment disposes the scattering element 140 and the light homogenizing rod body 120 in the closed cavity 150, so that the dustproof member can be effectively dustproof, and the scattering element 140 and the scattering element are avoided. The homogenizing rod body 120 directly contacts the outside world, prolonging the service life of the light homogenizing device 100 and the light source system and the projection device using the homogenizing device 100.
图2为本实用新型另一实施例提供的匀光棒体220的立体结构示意图。FIG. 2 is a schematic perspective structural view of a light homogenizing rod 220 according to another embodiment of the present invention.
本实施例中的匀光装置(图未示)与所述匀光装置100相比较，主要区别在于，匀光棒体220位于所述入光端221与所述出光端(图未示)之间的部位的外表面形成有曲面部阵列223。本实施例中，所述曲面部阵列223设置有沿光路方向延伸的多个柱面体。所述曲面部阵列223面向所述匀光棒体220外部的表面镀设有用于对光进行反射 的反射膜。在其他实施例中，曲面部阵列223可以设置有沿光路方向延伸的多个复眼。The light-sharing device (not shown) in this embodiment is compared with the light-smoothing device 100. The main difference is that the light-receiving rod 220 is located at the light-incident end 221 and the light-emitting end (not shown). A curved surface portion array 223 is formed on the outer surface of the portion between the portions. In this embodiment, the curved surface array 223 is provided with a plurality of cylindrical bodies extending in the optical path direction. A surface of the curved surface portion array 223 facing the outside of the uniform light rod body 220 is plated with a reflective film for reflecting light. In other embodiments, the curved portion array 223 may be provided with a plurality of compound eyes extending in the direction of the optical path.
本实施例中，所述匀光棒体220为圆柱形实心结构。可以理解的是，在其他实施例中，所述匀光棒体220还可以是四方棱柱或是其他形状的实心结构。In this embodiment, the homogenizing rod body 220 is a cylindrical solid structure. It can be understood that in other embodiments, the homogenizing rod 220 can also be a square prism or a solid structure of other shapes.
光束进入所述匀光棒体220后，部分小角度入射光直接穿过所述匀光棒体220出射，其它角度的入射光在所述匀光棒体220内部传输到达所述曲面部阵列223的表面。由于所述曲面部阵列223表面是曲面且镀设反射膜，光束在所述曲面部阵列223表面发生反射，反射的方向由所述曲面部阵列223的曲率和光束的入射角决定。光束经过曲面反射后光束的传输方向发生改变，反射的次数增多。在所述匀光棒体220同等长度和横截面积的情况下，反射的次数越多，匀光效果越好，光斑分布的均匀性就越好。After the light beam enters the homogenizing rod body 220, part of the small-angle incident light directly exits through the homogenizing rod body 220, and incident light of other angles is transmitted inside the homogenizing rod body 220 to reach the curved surface portion array 223. s surface. Since the surface of the curved surface portion array 223 is curved and the reflective film is plated, the light beam is reflected on the surface of the curved surface portion array 223, and the direction of the reflection is determined by the curvature of the curved surface portion array 223 and the incident angle of the light beam. After the beam is reflected by the curved surface, the direction of the beam changes, and the number of reflections increases. In the case of the equal length and cross-sectional area of the homogenizing rod body 220, the more the number of reflections, the better the uniformity effect, and the better the uniformity of the spot distribution.
在本实施例中，匀光棒体220的入光端221与出光端的横截面为多边形，且其大小和外部光源的发光面积相近。在允许光学扩展量变大的条件下，所述入光端221的横截面积可以比外部光源的发光面积大。In this embodiment, the cross-section of the light-incident end 221 and the light-emitting end of the light-dancing rod 220 is polygonal, and its size is similar to that of the external light source. The cross-sectional area of the light incident end 221 may be larger than the light emitting area of the external light source under the condition that the amount of optical expansion is allowed to become large.
可以理解，在其他实施例中，匀光装置中的匀光棒体220为空心结构，入光端221与出光端(图未示)均形成开口。所述匀光棒体220位于所述入光端221与所述出光端之间的内部表面设置有曲面部阵列223。所述曲面部阵列223设置有沿光路方向延伸的多个复眼或柱面体。所述曲面部阵列223面向所述匀光棒体220内部的表面镀设有用于对光进行反射的反射膜。It can be understood that in other embodiments, the homogenizing rod body 220 in the light homogenizing device is a hollow structure, and the light-incident end 221 and the light-emitting end (not shown) form an opening. The illuminating rod body 220 is disposed on the inner surface between the light incident end 221 and the light exiting end with a curved surface array 223. The curved surface array 223 is provided with a plurality of compound eyes or cylinders extending in the optical path direction. A surface of the curved surface portion array 223 facing the inside of the uniform light rod body 220 is plated with a reflective film for reflecting light.
由于所述曲面部阵列223表面是曲面且镀设反射膜，光束在所述曲面部阵列223表面发生反射，反射的方向由所述曲面部阵列223的曲率和光束的入射角决定。光束经过曲面反射后光束的传输方向发生改变，反射的次数增多。在所述匀光棒体220同等长度和横截面积的情况下，反射的次数越多，匀光效果越好，光斑分布的均匀性就越好。Since the surface of the curved surface portion array 223 is curved and the reflective film is plated, the light beam is reflected on the surface of the curved surface portion array 223, and the direction of the reflection is determined by the curvature of the curved surface portion array 223 and the incident angle of the light beam. After the beam is reflected by the curved surface, the direction of the beam changes, and the number of reflections increases. In the case of the equal length and cross-sectional area of the homogenizing rod body 220, the more the number of reflections, the better the uniformity effect, and the better the uniformity of the spot distribution.
另外，采用本实施例与第一实施例相同的是，所述匀光装置将散 射元件与所述匀光棒体220设置于封闭腔体内，从而可以有效地防尘，避免了所述散射元件与所述匀光棒体直接与外界接触，延长了所述匀光装置及采用所述匀光装置的光源系统及投影设备的使用寿命。In addition, the present embodiment is the same as the first embodiment in that the light homogenizing device is disposed in the closed cavity with the scattering element and the light homogenizing rod 220, thereby effectively preventing dust and avoiding the scattering element. Direct contact with the outside of the homogenizing rod body prolongs the service life of the light homogenizing device and the light source system and the projection device using the homogenizing device.
以上所述仅为本实用新型的实施方式，并非因此限制本实用新型的专利范围，凡是利用本实用新型说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本实用新型的专利保护范围内。The above is only the embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the utility model and the drawings, or directly or indirectly applied to other The related technical fields are all included in the scope of patent protection of the present invention.

Claims (10)

  1. 一种匀光装置，其特征在于，所述匀光装置包括一封闭腔体、及设置于所述封闭腔体内的散射元件与匀光棒体，所述匀光棒体的相对两端分别为入光端和出光端，所述封闭腔体包括能够透光且与所述匀光棒体的入光端和出光端分别对应的入光侧和出光侧，所述散射元件设于所述封闭腔体的入光侧与所述匀光棒体的入光端之间。A light homogenizing device, comprising: a closed cavity; and a scattering element and a light homogenizing rod disposed in the closed cavity, wherein opposite ends of the light homogenizing rod are respectively And the light-emitting end and the light-emitting end, the closed cavity includes a light-incident side and a light-emitting side respectively capable of transmitting light and corresponding to the light-incident end and the light-emitting end of the light-smoothing rod body, and the scattering element is disposed in the closed The light incident side of the cavity is between the light incident side of the light homogenizing rod body.
  2. 如权利要求1所述的匀光装置，其特征在于，所述封闭腔体的入光侧与出光侧均设置有透光膜片。The light homogenizing device according to claim 1, wherein a light transmitting film is disposed on both the light incident side and the light exiting side of the closed cavity.
  3. 如权利要求2所述的匀光装置，其特征在于，所述透光膜片为增透膜。The light homogenizing device according to claim 2, wherein said light transmissive film is an antireflection film.
  4. 如权利要求1所述的匀光装置，其特征在于，所述匀光棒体为空心结构。The light homogenizing device of claim 1 wherein said homogenizing rod body is a hollow structure.
  5. 如权利要求4所述的匀光装置，其特征在于，所述匀光棒体位于所述入光端与所述出光端之间的部位的内表面形成有曲面部阵列，所述曲面部阵列面向所述匀光棒体内部的表面镀设有用于对光进行反射的反射膜。The light homogenizing device according to claim 4, wherein the inner surface of the portion of the light-receiving rod located between the light-incident end and the light-emitting end is formed with an array of curved portions, the curved portion array A surface facing the inside of the homogenizing rod body is plated with a reflective film for reflecting light.
  6. 如权利要求1所述的匀光装置，其特征在于，所述匀光棒体为实心结构。The light homogenizing device of claim 1 wherein said homogenizing rod body is a solid structure.
  7. 如权利要求6所述的匀光装置，其特征在于，所述匀光棒体位于所述入光端与所述出光端之间的部位的外表面形成有曲面部阵列，所述曲面部阵列面向所述匀光棒体外部的表面镀设有用于对光进行反射的反射膜。The light homogenizing device according to claim 6, wherein the outer surface of the portion of the light-dancing rod between the light-incident end and the light-emitting end is formed with an array of curved portions, the curved portion array A surface facing the outside of the homogenizing rod body is plated with a reflective film for reflecting light.
  8. 如权利要求5或7所述的匀光装置，其特征在于，所述曲面部阵列为沿光路方向延伸的复眼或柱面体。The light homogenizing device according to claim 5 or 7, wherein the curved surface array is a compound eye or a cylindrical body extending in the optical path direction.
  9. 一种光源系统，其特征在于，所述光源系统包括发光体及如权利要求1-8任意一项所述的匀光装置，所述发光体发出的光束自所述封闭腔体的入光侧入射，依次经所述散射元件散射、所述匀光棒体的匀光后自所述封闭腔体的出光侧出射。A light source system, characterized in that the light source system comprises an illuminant and the light homogenizing device according to any one of claims 1-8, wherein the illuminating body emits a light beam from the light incident side of the closed cavity The incident light is sequentially scattered by the scattering element, and the homogenizing rod body is homogenized and then emitted from the light emitting side of the closed cavity.
  10. 一种投影设备，其特征在于，所述投影设备包括如权利要求1-8任意一项所述的匀光装置。A projection apparatus, characterized in that the projection apparatus comprises the light homogenizing means according to any one of claims 1-8.
PCT/CN2018/074754 2017-07-21 2018-01-31 Light homogenizing device, light source system and projection device WO2019015297A1 (en)

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