TW201908792A - Optical integrator holder and optical integrator unit - Google Patents
Optical integrator holder and optical integrator unit Download PDFInfo
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- TW201908792A TW201908792A TW107118522A TW107118522A TW201908792A TW 201908792 A TW201908792 A TW 201908792A TW 107118522 A TW107118522 A TW 107118522A TW 107118522 A TW107118522 A TW 107118522A TW 201908792 A TW201908792 A TW 201908792A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V15/00—Protecting lighting devices from damage
- F21V15/01—Housings, e.g. material or assembling of housing parts
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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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
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Abstract
Description
本發明關於用以保持光積分器之光積分器保持具及使用此光積分器保持具之光積分器單元。The present invention relates to a light integrator holder for holding an optical integrator and a light integrator unit using the same.
關於組裝在投射型顯示裝置中的光積分機(以下，稱為光積分器)，揭露有使自光源發出的光的輝度分佈均勻化(以下，也稱為光的均勻化)之各種技術。Regarding a light integrator (hereinafter referred to as a light integrator) incorporated in a projection type display device, various techniques have been disclosed for equalizing the luminance distribution of light emitted from a light source (hereinafter, also referred to as light uniformity).
於組裝在投射型顯示裝置中的光積分機之中，有桿(rod)積分器及複眼(fly eye)積分器。桿積分器，其使自桿體的一方的端面射入的光，在桿體內進行內反射而重疊在出射面上，藉此使輝度分佈均勻化。相較於複眼積分器，桿積分器具有容易對應小型化的投射型顯示裝置中之優點，並適用於將發光元件作為光源之投射型顯示裝置中。Among the light integrators assembled in the projection type display device are a rod integrator and a fly eye integrator. The rod integrator causes the light incident from one end surface of the rod body to be internally reflected in the rod body and superimposed on the exit surface, thereby uniformizing the luminance distribution. Compared with a compound-eye integrator, a rod integrator has the advantage of being easy to cope with a miniaturized projection type display device, and is suitable for a projection type display device using a light emitting element as a light source.
在桿積分器的桿體之中，有玻璃桿體等的實心桿體、及貼合有鏡面(mirror)之中空桿體。在中空桿體中，由於使用一種蒸鍍銀或鋁等而成的鏡面的反射面來反射光，所以在重複地進行內反射的期間會產生反射損失。另一方面，在實心桿體中，內反射幾乎都成為全反射，所以相較於中空桿體，實心桿體具有反射損失少的優點。Among the rod bodies of the rod integrator, there are a solid rod body such as a glass rod body, and a hollow rod body to which a mirror is attached. In the hollow rod body, since a specular reflective surface formed by vapor-depositing silver, aluminum, or the like is used to reflect light, reflection loss occurs during repeated internal reflections. On the other hand, in a solid rod body, internal reflection almost becomes total reflection, so compared with a hollow rod body, a solid rod body has the advantage of less reflection loss.
關於實心桿體，作為對應投射型顯示裝置的小型化之技術，揭露一種光的均勻化的技術，其在實心桿體的內部無規律地(random)填充有散射粒子，該散射粒子具有使光散射的機能，以利用散射來實行光的均勻化(專利文獻1)。 依據專利文獻1的技術，相較於重複地進行全反射來實行光的均勻化之先前的實心桿體的情況，能夠實現一種光積分器，其以比較緊湊的尺寸來發揮同等的機能。Regarding the solid rod body, as a technology corresponding to the miniaturization of the projection type display device, a technology for homogenizing light is disclosed. The solid rod body is randomly filled with scattering particles, and the scattering particles have The function of scattering is to make light uniform by scattering (Patent Document 1). According to the technique of Patent Document 1, it is possible to realize an optical integrator that performs the same function in a relatively compact size compared to the case of a conventional solid rod that repeatedly performs total reflection to uniformize light.
[先前技術文獻] (專利文獻) 專利文獻1：日本特開2016-65909號公報[Prior Art Document] (Patent Document) Patent Document 1: Japanese Patent Application Laid-Open No. 2016-65909
[發明所欲解決的問題] 但是，在專利文獻1的技術中，自光源射出並入射至實心桿體中的光，碰撞到散射粒子而成為散射光，因此該散射光的一部分自光積分器的側面射出，而導致光射出效率降低的問題。 另外，在本說明書中，將自光積分器的出射面射出的光束量，相對於入射至光積分器的入射面的光束量的比率，定義為光射出效率。[Problems to be Solved by the Invention] However, in the technique of Patent Document 1, since light emitted from a light source and incident on a solid rod body collides with scattered particles and becomes scattered light, a part of the scattered light is from an optical integrator. The light is emitted from the side, resulting in a problem that the light emission efficiency is reduced. In addition, in this specification, the ratio of the amount of light beams emitted from the exit surface of the optical integrator to the amount of light beams incident on the incident surface of the integrator is defined as the light emission efficiency.
本發明為了解決上述問題，針對使用光積分器之光積分器單元，提供一種改善光射出效率的技術，該光積分器，利用由已填充在實心桿體的內部中的散射粒子所造成的光的散射來實行光的均勻化。In order to solve the above problems, the present invention provides a technology for improving light emission efficiency for a light integrator unit using a light integrator. The light integrator uses light caused by scattering particles that have been filled in the interior of a solid rod body. Scattering to homogenize the light.
[解決問題的技術手段] 為了解決上述問題，本發明人深入檢討的結果，發現能夠藉由使用特定構造的光積分器保持具來解決上述問題，而完成本發明。本發明提供以下[1]～[8]的技術。 [1]一種光積分器保持具，其具有光積分器收容空間，在前述光積分器收容空間具有反射面，該反射面對來自光積分器側面的漏光進行鏡面反射或亂反射。 [2]如[1]所述之光積分器保持具，其中，前述反射面是構成前述光積分器收容空間的內壁面。 [3]如[1]或[2]所述之光積分器保持具，其中，前述反射面由金屬構成。 [4]如[1]或[2]所述之光積分器保持具，其中，前述反射面由白色物體構成。 [5]一種光積分器單元，其在[1]～[4]中任一者的光積分器保持具的光積分器收容空間中收容有光積分器， 前述光積分器，至少在其一部分具有使光散射之光散射部。 [6]如[5]所述之光積分器單元，其中，前述光積分器由實心桿體構成，該實心桿體具有供光射入的入射面、使前述光射出的出射面、及連結前述入射面和前述出射面之側面； 前述光散射部是在折射率N1的介質中含有折射率N2的散射粒子而成，該折射率N2與前述折射率N1不同。 [7]如[6]所述之光積分器單元，其中，將前述光積分器的前述側面與前述反射面大致平行且鄰近地配置。此處的大致平行，只要是實質上平行即可，也可以不是完全地平行而容許在不會顯著地妨礙發明效果的範圍中的誤差。又，鄰近，是指在沒有接觸的情況下位於附近。 [8]如[6]或[7]所述之光積分器單元，其中，前述光積分器具有前述光散射部與全反射部，該全反射部僅由前述折射率N1的介質構成，該全反射部的前述側面為全反射面。[Technical Means for Solving the Problem] In order to solve the above-mentioned problem, as a result of an in-depth review by the inventor, it was found that the above-mentioned problem can be solved by using an optical integrator holder with a specific structure to complete the present invention. The present invention provides the following techniques [1] to [8]. [1] An optical integrator holder having an optical integrator receiving space, and a reflective surface in the aforementioned optical integrator receiving space, the reflecting surface specularly or randomly reflecting light leaked from the side of the optical integrator. [2] The light integrator holder according to [1], wherein the reflecting surface is an inner wall surface constituting the light integrator storage space. [3] The optical integrator holder according to [1] or [2], wherein the reflecting surface is made of metal. [4] The light integrator holder according to [1] or [2], wherein the reflecting surface is made of a white object. [5] An optical integrator unit containing an optical integrator in the optical integrator storage space of the optical integrator holder of any one of [1] to [4], wherein the optical integrator is at least a part thereof It has a light-scattering part which scatters light. [6] The optical integrator unit according to [5], wherein the optical integrator is composed of a solid rod body, the solid rod body having an incident surface through which light is incident, an exit surface through which the light is emitted, and a connection A side surface of the incident surface and the exit surface; the light scattering portion is formed by scattering particles having a refractive index N2 in a medium having a refractive index N1, and the refractive index N2 is different from the refractive index N1. [7] The light integrator unit according to [6], wherein the side surface of the light integrator and the reflection surface are arranged substantially parallel and adjacent to each other. The term “substantially parallel” here may be substantially parallel, and an error in a range that does not significantly impede the effect of the invention may be acceptable instead of being completely parallel. Proximity means being in the vicinity without contact. [8] The light integrator unit according to [6] or [7], wherein the light integrator has the light scattering portion and a total reflection portion, and the total reflection portion is composed of only the medium of the refractive index N1, and The side surface of the total reflection portion is a total reflection surface.
[發明的效果] 在使用光積分器之光積分器單元中，該光積分器是在實心桿體的內部填充有散射粒子並利用藉由該散射粒子來進行散射而成的散射光來實行光的均勻化，藉由使用由上述構成而組成之光積分器保持具，利用光積分器收容空間的反射面，將來自光積分器側面的漏光加以反射，並再次回收到光積分器內，而能夠改善光射出效率。[Effect of the Invention] In a light integrator unit using a light integrator, the light integrator is filled with scattering particles inside a solid rod body and uses scattered light to scatter the scattered particles to implement light. By using the light integrator holder composed of the above structure and using the reflecting surface of the light integrator housing space to reflect the leakage light from the side of the light integrator, the light is recovered again into the light integrator, It is possible to improve light emission efficiency.
以下，詳述在本發明的一實施形態中的光積分器單元。另外，本發明不受限於下述實施形態。Hereinafter, an optical integrator unit according to an embodiment of the present invention will be described in detail. The present invention is not limited to the following embodiments.
[光積分器單元] 如第1圖所示，本實施形態的光積分器單元10，是由下述構件所構成：光源1；光積分器2，其被配置在光源1的光軸上；及，光積分器保持具5，其具有收容此光積分器2之光積分器收容空間3。在本實施形態中，以包含光源之光積分器單元來進行說明，但是光源也可以設置在光積分器單元的外部。 光積分器收容空間3具有反射面6，該反射面6對來自光積分器側面9的漏光進行鏡面反射或亂反射。[Optical Integrator Unit] As shown in FIG. 1, the optical integrator unit 10 of this embodiment is composed of the following components: a light source 1; an optical integrator 2 which is arranged on the optical axis of the light source 1; And, the optical integrator holder 5 has a light integrator receiving space 3 that houses the optical integrator 2. In this embodiment, a light integrator unit including a light source is used for description, but the light source may be provided outside the light integrator unit. The light integrator housing space 3 has a reflecting surface 6 which specularly or randomly reflects light leakage from the side surface 9 of the light integrator.
[光積分器] 光積分器2，只要具有入射面7、出射面8及側面9即可，不特別限定其他形狀，但是能夠作成例如剖面是矩形或多角形的角柱、入射側小而出射側大的角錐台、圓柱等形狀。 在本說明書中，入射面7是指供來自LED(發光二極體，Light-emitting diode)等的光源1的光射入的面，出射面8是指使射入後的光射出的面，側面9是指連結入射面7和出射面8之面。[Optical Integrator] The optical integrator 2 is only required to have an entrance surface 7, an exit surface 8, and a side surface 9, and other shapes are not particularly limited. However, it can be made into, for example, a prism with a rectangular or polygonal cross section, and a small entrance side and an exit side. Large pyramids, cylinders and other shapes. In this specification, the incident surface 7 refers to a surface on which light from a light source 1 such as an LED (Light-emitting diode) is incident, and the exit surface 8 refers to a surface on which the incident light is emitted. 9 is a surface connecting the incident surface 7 and the exit surface 8.
本實施形態的光積分器2，是由內部含有散射粒子之實心構件所構成，並具有光散射部11，該光散射部11是在折射率N1的介質中含有折射率N2的散射粒子而成，該折射率N2與前述折射率N1不同。 由於入射角大於臨界角的光線不能夠自折射率高的介質朝向折射率低的介質行進，所以在僅由折射率N1的介質構成的光積分器中的內反射幾乎都成為全反射，而不會發生光從側面9的外漏(以下，稱為漏光)，但是在光散射部11卻會發生漏光，該光散射部11是在折射率N1的介質中含有折射率N2的散射粒子而成，該折射率N2與前述折射率N1不同。 依據本發明，在光積分器收容空間3的反射面6上進行鏡面反射或亂反射以將此漏光回收到光積分器2的內部，所以能夠避免以漏光為起因的光射出效率的降低，而改善光射出效率。The light integrator 2 of this embodiment is composed of a solid member containing scattering particles inside, and has a light scattering portion 11 which is composed of scattering particles having a refractive index N2 in a medium having a refractive index N1. This refractive index N2 is different from the aforementioned refractive index N1. Since rays with an angle of incidence greater than the critical angle cannot travel from a medium with a high refractive index to a medium with a low refractive index, the internal reflection in an optical integrator composed of a medium with a refractive index N1 almost becomes total reflection without Light leakage from the side surface 9 (hereinafter referred to as light leakage) occurs, but light leakage occurs at the light scattering portion 11 which is composed of scattering particles having a refractive index N2 in a medium having a refractive index N1. This refractive index N2 is different from the aforementioned refractive index N1. According to the present invention, specular reflection or random reflection is performed on the reflecting surface 6 of the light integrator housing space 3 to recover this leaked light to the inside of the light integrator 2, so it is possible to avoid a decrease in light emission efficiency caused by light leakage, and Improve light emission efficiency.
在第1圖所示的實施形態中，整個光積分器2是由光散射部11構成。 作為其他實施形態，如第2圖所示，能夠將入射面7側作成僅由折射率N1的介質構成的全反射部12，將出射面8側作成在折射率N1的介質中含有折射率N2的散射粒子而成的光散射部11，該折射率N2與前述折射率N1不同。 如第2圖所示，將光積分器2的入射面7側作成全反射部12，並將出射面8側作成光散射部11，藉此能夠進一步提升光射出效率。 全反射部12與光散射部11的比率，較佳是1：1～10：1，更佳是1.5：1～5：1。In the embodiment shown in FIG. 1, the entire light integrator 2 is composed of a light scattering section 11. As another embodiment, as shown in FIG. 2, the side of the incident surface 7 can be made into a total reflection portion 12 made of a medium with a refractive index N1, and the side of the exit surface 8 can be made to contain a refractive index N2 in a medium with a refractive index N1. The refractive index N2 of the light-scattering portion 11 made of scattered particles is different from the refractive index N1. As shown in FIG. 2, the incident surface 7 side of the light integrator 2 is formed as a total reflection portion 12, and the exit surface 8 side is formed as a light scattering portion 11, so that the light emission efficiency can be further improved. The ratio of the total reflection portion 12 to the light scattering portion 11 is preferably 1: 1 to 10: 1, and more preferably 1.5: 1 to 5: 1.
作為折射率N1的介質，能夠自光硬化性樹脂、熱硬化性樹脂、熱可塑性樹脂等之中選擇任意的樹脂。其中，選擇光硬化性樹脂，藉此得到容易與散射粒子進行混合的優點、在硬化後不必進行冷卻和乾燥等步驟而提升作業效率的優點、及容易形成規定的形狀的優點。又，選擇丙烯酸系樹脂等，藉此能夠提高光的利用效率。As the medium of the refractive index N1, any resin can be selected from among photocurable resins, thermosetting resins, and thermoplastic resins. Among them, the photo-curable resin is selected to obtain the advantages of easy mixing with the scattering particles, the advantage of improving the work efficiency without the need to perform steps such as cooling and drying after hardening, and the advantage of being easy to form a predetermined shape. In addition, by selecting an acrylic resin or the like, the use efficiency of light can be improved.
作為折射率N2的散射粒子，能夠使用由塑膠、玻璃、或其他材料構成的粒子。散射粒子，具有球狀或其他形狀。藉由作成泛用品的球狀，能夠抑制成本。在實心構件中所含有的散射粒子之中，90%以上的散射粒子的粒徑，期望是在0.5μm以上且5μm以下的範圍中。隨著粒徑變得太小會使得光容易散射，如果引起過度散射則會有光的取出效率降低的傾向。另一方面，隨著粒徑變得太大會有使得光不容易散射的傾向。藉由將散射粒子的粒徑收斂在上述範圍中，能夠使光的取出效率不會降低且得到充分的光的擴散效果。As the scattering particles having the refractive index N2, particles made of plastic, glass, or other materials can be used. Scattering particles, having a spherical or other shape. By forming the spherical shape of the universal product, cost can be suppressed. Among the scattering particles contained in the solid member, the particle diameter of 90% or more of the scattering particles is desirably in a range of 0.5 μm or more and 5 μm or less. As the particle diameter becomes too small, light is easily scattered, and if excessive scattering is caused, light extraction efficiency tends to decrease. On the other hand, as the particle diameter becomes too large, there is a tendency that light is not easily scattered. By converging the particle diameter of the scattering particles within the above range, it is possible to obtain a sufficient light diffusion effect without reducing the light extraction efficiency.
依據司乃耳的法則，折射率N1與折射率N2的差異越大，能夠得到更大的擴散機能。折射率N1和折射率N2，任一方的折射率較大都可以，但是折射率N1與折射率N2的差，期望是0.005以上。如果折射率N1與折射率N2的差是0.005以上且0.015以下，則散射粒子與實心構件的比重容易變得接近，而容易將散射粒子混合在實心構件中。又，也能夠得到充分的光擴散效果。According to Snell's law, the larger the difference between the refractive index N1 and the refractive index N2, the larger the diffusion function can be obtained. Either the refractive index N1 or the refractive index N2 may be large, but the difference between the refractive index N1 and the refractive index N2 is preferably 0.005 or more. When the difference between the refractive index N1 and the refractive index N2 is 0.005 or more and 0.015 or less, the specific gravity of the scattering particles and the solid member tends to be close, and the scattering particles are easily mixed in the solid member. Moreover, a sufficient light diffusion effect can also be obtained.
散射粒子的含有率，較佳是0.1～10體積%，更佳是0.5～3體積%，能夠對應於自出射面射出的光的均勻性及/或光量來調整。 在折射率N1的介質中含有折射率N2的散射粒子而成之光散射部11，在該光散射部11內也能夠使得在出射面8側含有更多的散射粒子，使得在不同位置的散射粒子的含有率有所差異。 在上述實施形態中，針對在折射率N1的介質中含有折射率N2的散射粒子而成之光散射部11來進行說明，但是也能夠在光積分器2的表面上附加凹凸形狀以使光散射。The content of the scattering particles is preferably from 0.1 to 10% by volume, more preferably from 0.5 to 3% by volume, and can be adjusted in accordance with the uniformity and / or amount of light emitted from the emission surface. A light-scattering portion 11 formed by including scattering particles having a refractive index N2 in a medium having a refractive index N1. In the light-scattering portion 11 can also include more scattering particles on the exit surface 8 side, so that scattering at different positions can be performed. The content of particles varies. In the embodiment described above, the light scattering portion 11 including scattering particles with a refractive index N2 is contained in a medium with a refractive index N1, but a concave-convex shape may be added to the surface of the light integrator 2 to scatter light. .
[光積分器保持具] 光積分器保持具5，具有光積分器收容空間3部分、及框體4部分。 光積分器收容空間3具有反射面6，該反射面6對來自光積分器側面的漏光進行鏡面反射或亂反射。反射面6的反射率，在超過0%的範圍中越高越好。[Optical Integrator Holder] The optical integrator holder 5 includes three portions of the optical integrator storage space and four portions of the housing. The light integrator housing space 3 has a reflecting surface 6 which specularly or randomly reflects light leakage from the side of the light integrator. The reflectance of the reflecting surface 6 is preferably as high as possible in a range exceeding 0%.
在本實施形態中，將被框體4包圍的內部空間作為光積分器收容空間3，並將面向光積分器收容空間3之框體4的壁面作為反射面6。藉由將框體4的壁面作成反射面6而能夠抑制反射面6的變形。 作為其他實施形態，也能夠在面向光積分器收容空間3之框體4的壁面、與光積分器2的側面9之間，配置獨立構件的反射體以作為反射面6。 反射面6和光積分器2的側面9，較佳是平行且鄰近地配置。藉由這種配置，能夠有效地增加被回收到光積分器2的內部之光量。此處的大致平行，只要是實質上平行即可，也可以不是完全地平行。具體來說，例如是在自平行方向傾斜-10度以上且10度以下的範圍內的方向，而容許在不會顯著地妨礙發明效果的範圍中的誤差。又，此處的鄰近，是指在沒有接觸的情況下位於附近。具體來說，例如光積分器2與框體4的間隙(X)在0.001mm以上且1mm以下的範圍內，而容許在不會顯著地妨礙發明效果的範圍中的誤差。自減少漏光的觀點來看，較佳是0.001mm以上且0.3mm以下，更佳是0.001mm以上且0.1mm以下。In the present embodiment, the internal space surrounded by the frame 4 is used as the light integrator storage space 3, and the wall surface of the frame 4 facing the light integrator storage space 3 is used as the reflection surface 6. By forming the wall surface of the frame body 4 as the reflection surface 6, deformation of the reflection surface 6 can be suppressed. As another embodiment, an independent member reflector may be disposed as the reflection surface 6 between the wall surface of the frame 4 facing the light integrator storage space 3 and the side surface 9 of the light integrator 2. The reflecting surface 6 and the side surface 9 of the optical integrator 2 are preferably arranged in parallel and adjacently. With this arrangement, it is possible to effectively increase the amount of light recovered into the inside of the optical integrator 2. Here, it is substantially parallel as long as it is substantially parallel, and it may not be completely parallel. Specifically, for example, it is a direction inclined in a range of -10 degrees or more and 10 degrees or less from the parallel direction, and an error in a range that does not significantly impede the effect of the invention is allowed. Here, the term “proximate” means to be in the vicinity without contact. Specifically, for example, the gap (X) between the optical integrator 2 and the housing 4 is in a range of 0.001 mm or more and 1 mm or less, and an error in a range that does not significantly interfere with the effect of the invention is allowed. From the viewpoint of reducing light leakage, it is preferably 0.001 mm or more and 0.3 mm or less, and more preferably 0.001 mm or more and 0.1 mm or less.
反射面6是利用反射率高的高反射材料來構成。 在本說明書中，高反射材料是指反射率85%以上的材料。高反射材料的反射率，較佳是88%以上，更佳是90%以上。The reflecting surface 6 is made of a highly reflective material having a high reflectance. In this specification, a highly reflective material refers to a material having a reflectance of 85% or more. The reflectance of the highly reflective material is preferably 88% or more, and more preferably 90% or more.
反射面6，能夠將例如鋁、銀等的金屬加以鍍覆加工或蒸鍍加工來得到。又，反射面6，也能夠利用白色矽或白色聚碳酸酯樹脂製的白色物體來構成而獲得。 利用上述金屬或白色物體來構成反射面6，藉此能夠有效地增加被回收到光積分器2的內部之光量。The reflecting surface 6 can be obtained by plating or vapor-depositing a metal such as aluminum or silver. The reflecting surface 6 can also be obtained by using a white object made of white silicon or a white polycarbonate resin. By forming the reflecting surface 6 with the above-mentioned metal or white object, it is possible to effectively increase the amount of light recovered into the inside of the optical integrator 2.
也可以利用高反射材料來僅構成框體4的內壁面的反射面6、或者也能夠利用高反射材料來構成框體4本身。 利用高反射材料來構成框體4本身，並將在其框體內形成的光積分器收容空間3的內壁面作為反射面6使用，藉此能夠以更簡單的構成來得到本發明的效果。A highly reflective material may be used to constitute only the reflective surface 6 of the inner wall surface of the housing 4, or a highly reflective material may be used to constitute the housing 4 itself. The frame 4 itself is made of a highly reflective material, and the inner wall surface of the optical integrator storage space 3 formed in the frame is used as the reflection surface 6, whereby the effect of the present invention can be obtained with a simpler structure.
[實施例] 以下，在實施例中更具體地說明本發明，但是本發明不受限於以下的實施例，只要不超過本發明的主旨即可。[Examples] Hereinafter, the present invention will be described more specifically in examples, but the present invention is not limited to the following examples, as long as the gist of the present invention is not exceeded.
使用第3圖和第4圖所示的光積分器單元10，並測定光積分器2的正面輝度。The photointegrator unit 10 shown in FIGS. 3 and 4 was used, and the front luminance of the photointegrator 2 was measured.
(光積分器的樣式) 光積分器2，具有長度4.15mm、高度1.05mm、寬度1.05mm的四角柱的形狀。其內部，利用透明度高且折射率1.51的介質加以充滿，並在該介質中，無規律地分佈有透明度高且折射率1.59的粒子。作為介質是使用日立化成股份有限公司製造的HITALOID 9501(商品名)。這是氨酯丙烯酸酯系的光硬化性樹脂。又，作為粒子是使用積水化成品工業股份有限公司製造的TECH POLYMER SSX-302ABE(商品名)。這是交聯聚苯乙烯樹脂的微粒子，是一種單分散粒子，其形狀是平均直徑2μm的球狀，整體的95%以上的粒子，其直徑與平均直徑的差是0.5μm以內。(Style of Optical Integrator) The optical integrator 2 has a shape of a quadrangular pillar having a length of 4.15 mm, a height of 1.05 mm, and a width of 1.05 mm. Inside, it is filled with a medium with high transparency and a refractive index of 1.51, and particles with high transparency and a refractive index of 1.59 are randomly distributed in this medium. As the medium, HITALOID 9501 (trade name) manufactured by Hitachi Chemical Co., Ltd. was used. This is a urethane acrylate-based photocurable resin. As the particles, TECH POLYMER SSX-302ABE (trade name) manufactured by Sekisui Chemical Industry Co., Ltd. was used. These are microparticles of crosslinked polystyrene resin. They are monodisperse particles. The shape is spherical with an average diameter of 2 μm. 95% of the whole particles have a difference between the diameter and the average diameter within 0.5 μm.
(光積分器的製造方法) 光積分器2，以下述方式方法來製造。首先，在光硬化性樹脂中摻入整體的重量的0.6%的微粒子並充分攪拌，其後進行脫泡。以60mm×60mm(millimeter square)的尺寸將厚度1.05mm的金屬板的中央加以挖穿，並利用玻璃板夾在該金屬板的兩表面而作成模。藉此能夠在模內作成長度60mm、寬度60mm、深度1.05mm的空隙。使上述脫泡後的樹脂流入此空隙中。此時，不使空氣進入此空隙中。之後，透過玻璃使UV燈(ultraviolet lamp)進行照射，而使樹脂充分硬化。其後，取出製品，並使用切割器(DAC552，DISCO股份有限公司製造)切出寬度1.05mm、長度4.15mm。使用粒徑#5000的切割刀刃(dicing blade)，並以旋轉數30,000rpm、切削速度1mm/sec的條件來加工側面。(Manufacturing method of optical integrator) The optical integrator 2 is manufactured by the following method. First, fine particles of 0.6% of the entire weight are blended into the photocurable resin and sufficiently stirred, and thereafter defoaming is performed. The center of a metal plate having a thickness of 1.05 mm was cut through at a size of 60 mm × 60 mm (millimeter square), and a glass plate was sandwiched between both surfaces of the metal plate to form a mold. As a result, a gap having a length of 60 mm, a width of 60 mm, and a depth of 1.05 mm can be created in the mold. The above-mentioned defoamed resin was caused to flow into this space. At this time, no air is allowed to enter the gap. Thereafter, a UV lamp (ultraviolet lamp) was irradiated through the glass to sufficiently harden the resin. After that, the product was taken out and cut with a cutter (DAC552, manufactured by DISCO Corporation) to a width of 1.05 mm and a length of 4.15 mm. A dicing blade with a particle size of # 5000 was used, and the sides were processed under conditions of a rotation number of 30,000 rpm and a cutting speed of 1 mm / sec.
(構成光積分器保持具之框體的樣式) 框體4，是將2cm×2cm的白色聚碳酸酯(Iupilon EHR3100，Mitsubishi Engineering-Plastics股份有限公司製造)，以切削成厚度3mm的方式來製作。形狀作成具有L字形剖面的柱體，將2個柱體加以組合並以包圍光積分器2的側面9的外周的方式配置，以作成光積分器收容空間3。這樣一來，將2個具有L字形剖面的柱體加以組合來形成光積分器收容空間3，藉此可以容易地調整光積分器2與框體4的間隙(X)。又，藉由作成相同形狀，能夠在框體4的內表面上，於包圍光積分器2的側面9的外周之處所，簡單地實行反射體的設置作業，該反射體成為反射面6。(Form of the frame constituting the holder of the optical integrator) The frame 4 is manufactured by cutting a 2 cm × 2 cm white polycarbonate (Iupilon EHR3100, manufactured by Mitsubishi Engineering-Plastics Co., Ltd.) into a thickness of 3 mm. . A pillar having an L-shaped cross-section is formed, and two pillars are combined and arranged so as to surround the outer periphery of the side surface 9 of the optical integrator 2 to create an optical integrator housing space 3. In this way, by combining two pillars having an L-shaped cross-section to form the optical integrator housing space 3, the gap (X) between the optical integrator 2 and the frame 4 can be easily adjusted. Furthermore, by forming the same shape, it is possible to easily perform the installation of the reflector on the inner surface of the frame 4 at the place surrounding the outer side of the side surface 9 of the optical integrator 2, and the reflector becomes the reflecting surface 6.
(反射面) 反射面6，是將下述表1所示的片或帶，設置在框體4的內表面上且包圍光積分器2的側面9的外周之處所而形成。 在實施例1中，為了確認擴散反射的效果而選定白色片，並貼附在框體4的內表面的上述處所。作為白色片，使用TORAY股份有限公司製造的LUMIRROR E20(商品名)。如果光照射在白色片的表面上則產生亂反射，其反射率是約90%。 在實施例2中，為了確認鏡面反射的效果而選定銀色片，並貼附在框體4的內表面的上述處所。作為銀色片，使用KIMOTO股份有限公司製造的REF-WHITE RW125(商品名)。如果光照射在銀色片的表面上則產生鏡面反射，其反射率是約90%。 在比較例1中，為了確認光不反射的情況而選定黑色帶，並貼附在框體4的內表面的上述處所。作為黑色帶，使用NICHIBAN股份有限公司製造的Vinyl tape VT-196(商品名)。(Reflecting Surface) The reflecting surface 6 is formed by placing a sheet or a tape shown in Table 1 below on the inner surface of the frame 4 and surrounding the outer periphery of the side surface 9 of the optical integrator 2. In Example 1, in order to confirm the effect of diffuse reflection, a white sheet was selected and attached to the above-mentioned space on the inner surface of the frame 4. As the white sheet, LUMIRROR E20 (trade name) manufactured by TORAY Co., Ltd. was used. If light is irradiated on the surface of the white sheet, random reflection occurs, and its reflectance is about 90%. In Example 2, in order to confirm the effect of specular reflection, a silver sheet was selected and attached to the above-mentioned space on the inner surface of the frame 4. As the silver sheet, REF-WHITE RW125 (trade name) manufactured by KIMOTO Co., Ltd. was used. If light is irradiated on the surface of the silver sheet, specular reflection occurs, and the reflectance is about 90%. In Comparative Example 1, in order to confirm that light is not reflected, a black band is selected and attached to the above-mentioned space on the inner surface of the frame 4. As the black tape, Vinyl tape VT-196 (trade name) manufactured by NICHIBAN Co., Ltd. was used.
(光源) 作為光源，使用LED(OSRAM公司製造的LTRB R8SF(商品名))。在1個LED中搭載紅色、藍色、綠色的三元件而成。(Light source) As a light source, an LED (LTRB R8SF (trade name) manufactured by OSRAM Corporation) was used. Three red, blue, and green elements are mounted in one LED.
(輝度測定) 將LED配置成密接在光積分器的入射面中心，並使陽極共用，在接地與紅色元件之間設置1kΩ的電阻，在藍色元件的兩端設置150Ω的電阻，對LED施加2.7V的電壓而發光。利用前述具有L字形剖面的柱體來包圍光積分器2，並且使用輝度計13來測定光積分器的出射面的正面輝度。 此時，將光積分器2與框體4的間隙(X)設成0.1mm。 輝度計13，使用KONICA MINOLTA股份有限公司製造的2次元色彩輝度計CA-1500 (商品名)。輝度是利用光積分器的出射面內的平均值來評價。(Brightness measurement) The LED is arranged so as to be in close contact with the center of the incident surface of the integrator, and the anode is shared. A resistance of 1 kΩ is set between the ground and the red element, and a resistance of 150 Ω is set at both ends of the blue element. 2.7V voltage. The integrator 2 is surrounded by the aforementioned column having an L-shaped cross section, and the luminance of the front surface of the exit surface of the integrator is measured using a luminance meter 13. At this time, the gap (X) between the optical integrator 2 and the housing 4 is set to 0.1 mm. As the luminance meter 13, a two-dimensional color luminance meter CA-1500 (trade name) manufactured by KONICA MINOLTA Co., Ltd. was used. The luminance is evaluated using the average value in the exit surface of the light integrator.
(評價結果) 評價結果如表1所示。 實施例1：當在光積分器側面外周上設置白色片時，輝度成為33,160 cd/m2 ，相較於沒有保持具的情況(比較例2)，輝度上升約9%。 實施例2：當在光積分器側面外周上設置銀色片時，輝度成為33,970 cd/m2 ，相較於沒有保持具的情況(比較例2)，輝度上升約11%。 比較例1：當在光積分器側面外周上設置黑色帶時，輝度成為30,150 cd/m2 ，相較於沒有保持具的情況(比較例2)，輝度幾乎沒有改變。(Evaluation results) The evaluation results are shown in Table 1. Example 1: When a white sheet is provided on the outer periphery of the side of the photo integrator, the luminance becomes 33,160 cd / m 2 , and the luminance increases by about 9% compared with a case without a holder (Comparative Example 2). Example 2: When a silver plate was provided on the outer periphery of the side of the photo integrator, the luminance was 33,970 cd / m 2 , and the luminance increased by about 11% compared with a case without a holder (Comparative Example 2). Comparative Example 1: When a black band is provided on the outer periphery of the side surface of the integrator, the luminance becomes 30,150 cd / m 2 , and the luminance is hardly changed compared to the case without the holder (Comparative Example 2).
[表1]
如表1所示，依據實施例1和實施例2，該等實施例在光積分器收容空間具有反射面，而能夠在使用光積分器之光積分器單元中改善光射出效率，該光積分器在實心桿體的內部填充有散射粒子並利用光的散射來實行光的均勻化。As shown in Table 1, according to Embodiments 1 and 2, these embodiments have a reflecting surface in the light integrator housing space, and can improve the light emission efficiency in the light integrator unit using the light integrator. The light integration The device is filled with scattering particles inside the solid rod body and performs light homogenization by using light scattering.
1‧‧‧光源1‧‧‧ light source
2‧‧‧光積分器2‧‧‧optical integrator
3‧‧‧光積分器收容空間3‧‧‧light integrator storage space
4‧‧‧框體4‧‧‧frame
5‧‧‧光積分器保持具5‧‧‧ optical integrator holder
6‧‧‧反射面6‧‧‧ reflective surface
7‧‧‧入射面7‧‧‧ incidence plane
8‧‧‧出射面8‧‧‧ exit surface
9‧‧‧側面9‧‧‧ side
10‧‧‧光積分器單元10‧‧‧Optical Integrator Unit
11‧‧‧光散射部11‧‧‧light scattering unit
12‧‧‧全反射部12‧‧‧ Total reflection
13‧‧‧輝度計13‧‧‧ Luminance Meter
X‧‧‧光積分器與框體的間隙X‧‧‧Gap between the integrator and the frame
第1圖是在一實施形態中的光積分器單元的垂直剖面圖。 第2圖是在其他實施形態中的光積分器單元的垂直剖面圖。 第3圖是實施例的光積分器單元的整體立體圖。 第4圖是實施例的光積分器單元的垂直剖面圖。FIG. 1 is a vertical cross-sectional view of an optical integrator unit according to an embodiment. Fig. 2 is a vertical cross-sectional view of a light integrator unit in another embodiment. FIG. 3 is an overall perspective view of the optical integrator unit of the embodiment. Fig. 4 is a vertical cross-sectional view of the optical integrator unit of the embodiment.
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW107118522A TW201908792A (en) | 2017-05-30 | 2018-05-30 | Optical integrator holder and optical integrator unit |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2018221579A1 (en) |
| KR (1) | KR20200013635A (en) |
| TW (1) | TW201908792A (en) |
| WO (1) | WO2018221579A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7461159B2 (en) | 2020-02-21 | 2024-04-03 | 浜松ホトニクス株式会社 | Prism rod holder, laser module, laser processing equipment and holding structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030063888A1 (en) * | 2001-10-01 | 2003-04-03 | Sahlin Jennifer J. | Channeling for use with light fiber |
| JP5418646B2 (en) * | 2012-08-28 | 2014-02-19 | 三菱電機株式会社 | Image reading line light source and light guide unit |
| JP2014182181A (en) * | 2013-03-18 | 2014-09-29 | Ushio Inc | Optical unit |
| JP6579355B2 (en) * | 2014-09-24 | 2019-09-25 | 日立化成株式会社 | Optical integrator and video projection apparatus using the same |
| JPWO2017013816A1 (en) * | 2015-07-22 | 2018-08-02 | 日立化成株式会社 | LIGHTING DEVICE, LIGHTING METHOD, AND VIDEO PROJECTION DEVICE USING THE SAME |
-
2018
- 2018-05-30 WO PCT/JP2018/020750 patent/WO2018221579A1/en active Application Filing
- 2018-05-30 TW TW107118522A patent/TW201908792A/en unknown
- 2018-05-30 JP JP2019521267A patent/JPWO2018221579A1/en active Pending
- 2018-05-30 KR KR1020197029709A patent/KR20200013635A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| KR20200013635A (en) | 2020-02-07 |
| JPWO2018221579A1 (en) | 2020-04-02 |
| WO2018221579A1 (en) | 2018-12-06 |
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