WO2019100451A1 - 消散斑装置、激光光源及激光投影系统 - Google Patents

消散斑装置、激光光源及激光投影系统 Download PDF

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WO2019100451A1
WO2019100451A1 PCT/CN2017/115238 CN2017115238W WO2019100451A1 WO 2019100451 A1 WO2019100451 A1 WO 2019100451A1 CN 2017115238 W CN2017115238 W CN 2017115238W WO 2019100451 A1 WO2019100451 A1 WO 2019100451A1
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wave plate
laser beam
incident
laser
sheet
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French (fr)
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杨乐宝
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Goertek Inc
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Goertek Inc
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/48—Laser speckle optics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/288—Filters employing polarising elements, e.g. Lyot or Solc filters
    • 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 laser technology. More specifically, it relates to a speckle reduction device, a laser light source, and a laser projection system.
  • the laser light source has the characteristics of high monochromaticity, high coherence, high directivity and high brightness.
  • the laser beam itself generates spot interference (self-coherence) due to the high coherence of the laser.
  • the self-coherence of the laser beam is the same: the laser frequency is the same, the vibration direction is uniform, and the phase difference is constant. Spot interference can result in the formation of stray light with uneven brightness along the laser exit spot, called laser speckle, which affects the imaging effect of the projection.
  • the utility model discloses a dissipating speckle device, which comprises a wave plate and a transmissive sheet respectively located in an optical path of a laser beam, wherein the wave plate and the transmissive sheet have a refractive index close to each other and the adjacent sides are closely arranged, and the wave plate is arranged as an incident surface. A portion of the incident laser beam passes through, the transmissive sheet being arranged such that the incident surface passes the remaining incident laser beam, the partially incident laser beam occupies 25% to 75% of the incident laser beam.
  • the partially incident laser beam occupies 50% of the incident laser beam.
  • the wave plate is a half wave plate.
  • the wave plate is bonded and fixed to an adjacent side of the transmissive sheet.
  • the wave plate is a rectangular, semi-circular or semi-elliptical wave plate
  • the transmission sheet is a rectangular, semi-circular or semi-elliptical transmission sheet.
  • the wave plate is an annular aperture plate having an intermediate opening
  • the transmission sheet is a transmission sheet matching the shape of the opening.
  • the wave plate is an annular wave plate having a centrally symmetrically shaped opening in the middle.
  • the wave plate is an annular wave plate having a circular opening in the middle.
  • the utility model also discloses a laser light source, comprising a laser for emitting a laser beam, and further comprising the above-mentioned dissipating spot device.
  • the utility model also discloses a laser projection system, which comprises the above laser light source.
  • the technical scheme of the utility model eliminates the laser speckle phenomenon by changing the vibration direction (or polarization state) of a part of the laser beam in the whole laser beam by the wave plate, thereby eliminating the influence of the laser speckle phenomenon on the laser imaging picture. Further, the technical solution of the present invention eliminates stray light caused by the refraction of the laser beam by the side of the wave plate when the laser beam is not vertically incident on the incident surface of the wave plate by the transmission sheet, thereby eliminating possible stray light pairs. The impact of laser imaging pictures. In addition, the technical solution of the utility model has the advantages of small volume, simple structure and high reliability.
  • Figure 1 shows a cross-sectional view of a speckle reduction device.
  • Figure 2 shows a cross-sectional view of a wave plate only without a transmission sheet.
  • Figure 3 shows a cross-sectional view of an anti-scattering device in an alternative manner.
  • the dissipating device includes a wave plate 100 and a transmissive sheet 200 respectively located in the optical path of the laser beam.
  • the wave plate 100 and the transmissive sheet 200 have similar refractive indexes, and the wave plate 100 is adjacent to the transmissive sheet 200.
  • the side patching arrangement the wave plate 100 is arranged such that the incident surface of the wave plate 100 passes a portion of the incident laser beam, the transmissive sheet 200 is arranged such that the incident surface of the transmissive sheet 200 passes the remaining incident laser beam, and the partially incident laser beam occupies the incident laser beam.
  • the incident laser beam passing through the incident surface of the wave plate 100 changes the vibration direction (or polarization state) from the wave plate 100, and the rest of the incident surface through the transmission sheet 200.
  • the laser beam or the remaining laser beam that has not passed through the incident surface of the wave plate 100 does not change the direction of vibration (or polarization state). Therefore, the dissipating device provided in this embodiment divides the incident laser beam into two laser beams having different vibration directions (or polarization states), and the two laser beams have different vibration directions (or polarization states), and the two portions are different. There is no interference between the laser beams.
  • the laser speckle phenomenon of the incident laser beam is eliminated, thereby eliminating the influence of the laser speckle phenomenon on the laser imaging image.
  • the transmissive sheet 200 is not provided, when the incident laser beam is not incident perpendicularly on the incident surface of the wave plate 100, a part of the laser beam is incident from the side surface of the wave plate 100, as shown in FIG. Show.
  • the optical path propagation direction does not change.
  • a portion of the laser beam incident from the side surface of the wave plate 100 is refracted at an angle passing through the side surface of the wave plate 100 and an angle at which a portion of the laser beam incident from the incident wave plate 100 is refracted when passing through the incident surface of the wave plate 100.
  • the exit direction is deflected, resulting in stray light of the entire laser beam, affecting the combination of the entire laser beam and the laser beam.
  • the imaging picture has an effect. And by the dissipating device provided in this embodiment as shown in FIG.
  • the wave is A portion of the laser beam incident on the side of the sheet 100 first passes through the two-direction refraction of the incident surface and the side surface of the transmissive sheet 200. Since the refractive index of the wave plate 100 and the transmissive sheet 200 are close, this portion of the laser beam passes through the exit surface of the wave plate 100 again.
  • the exit direction is not deflected, that is, the same as the other partial laser beams, that is, the entire outgoing laser beam emitted by the dissipating device provided by the embodiment and the integral incident laser beam incident on the dissipating device provided in the embodiment.
  • the light path travels in the same direction. Therefore, the despeckle device provided by the present embodiment avoids stray light caused by the refraction of the laser beam by the side of the wave plate 100 when the laser beam is not incident perpendicularly into the incident surface of the wave plate 100, thereby eliminating stray light that may occur. The impact on the laser imaging picture.
  • a portion of the incident laser beam occupies 50% of the incident laser beam. This can change the polarization state of half of the laser beam in the entire incident laser beam, so that part of the laser beam that does not change the polarization state of the incident laser beam and a part of the laser beam that changes the polarization state each account for half of the total incident laser beam, eliminating the incident laser beam.
  • the effect of the laser speckle phenomenon is better.
  • the wave plate 100 is a half wave plate. This makes it possible to make the vibration direction between the partial laser beam of the polarization state and the remaining laser beam of the unchanging polarization state perpendicular, and to eliminate the laser speckle phenomenon of the incident laser beam.
  • the incident laser beam is an S-state linearly polarized beam
  • part of the laser beam that changes the polarization state becomes P-state linearly polarized light
  • the remaining laser beam that does not change the polarization state is also the S-state linearly polarized beam because the P-state linearly polarized beam
  • the vibration directions of the linearly polarized beams and the S-state are perpendicular to each other, and no interference is formed between the two, thereby eliminating the laser speckle phenomenon of the incident laser.
  • the incident laser beam is P-state linearly polarized light
  • part of the laser beam incident on the laser beam is converted into S-state linearly polarized light, which also eliminates the laser speckle phenomenon of the incident laser light.
  • the wave plate 100 is bonded and fixed to the adjacent side of the transmissive sheet 200.
  • the wave plate 100 is a rectangular, semi-circular or semi-elliptical wave plate.
  • the transmission sheet 200 is a rectangular, semi-circular or semi-elliptical transmission sheet, that is, a wave plate.
  • Both the 100 and the transmissive sheet 200 are rectangular, or both are semi-circular (the semi-circular planar side is closely attached), or both are semi-elliptical (the semi-elliptical planar side is closely attached).
  • the above preferred shape is for the convenience of preparation and for facilitating the arrangement of the wave plate 100 and the transmissive sheet 200.
  • the wave plate 100 and the transmissive sheet 200 may have other shapes, and the shapes of the two may also be different.
  • the wave plate 100 is an annular aperture plate with an intermediate aperture
  • the transmission sheet 200 is a transmission sheet matching the shape of the aperture.
  • the wave plate 100 is placed in close contact with the adjacent side of the transmissive sheet 200" means that the inner side surface of the opening of the annular wave plate is in close contact with the outer side surface of the transmissive sheet matching the opening.
  • the wave plate 100 is an annular wave plate having a centrally symmetric shape opening in the middle, and correspondingly, the transmission sheet 200 is a central symmetric shape transmission sheet that matches the shape of the central symmetric shape opening. More preferably, as shown in FIG. 3, the wave plate 100 is an annular wave plate having a circular opening in the middle, and correspondingly, the transmission sheet 200 is a circular transmission sheet matching the shape of the circular opening.
  • the astigmatism device can further include a stop on the exiting light path of the wave plate 100 and the transmission sheet 200. Further, both the wave plate 100 and the transmissive sheet 200 are closely arranged with the aperture in the optical path direction, so that the effect of limiting the incident laser beam by the aperture is better, and the miniaturization of the speckle reduction device is made possible, thereby saving space, Reduce the overall volume of the device.
  • the embodiment provides a laser light source, comprising a laser that emits a laser beam and the above-mentioned dissipating spot device, and the laser beam emitted by the laser passes through the dissipating spot device to eliminate the laser speckle phenomenon.
  • the embodiment further provides a laser projection system including the above laser light source.
  • the orientation or positional relationship of the terms “upper”, “lower” and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification. It is to be understood that the invention is not to be construed as a limitation Unless specifically stated and limited, the terms “mounted,” “connected,” and “connected” are used in a broad sense, and may be, for example, a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be directly connected, or it can be connected indirectly through an intermediate medium, which can be the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

一种消散斑装置、激光光源及激光投影系统，消散斑装置包括分别位于激光束光路的波片（100）和透射片（200），波片（100）与透射片（200）折射率相近且相邻侧紧贴设置，波片（100）布置为入射面使部分入射激光束通过，透射片（200）布置为入射面使其余入射激光束通过，部分入射激光束占入射激光束的25％-75％。消散斑装置可消除激光散斑现象，并避免在消除激光散斑现象时产生杂散光。

Description

消散斑装置、激光光源及激光投影系统 技术领域
本实用新型涉及激光技术领域。更具体地，涉及一种消散斑装置、激光光源及激光投影系统。
背景技术
激光光源具有单色性高、相干性高、方向性高、亮度高等特点。激光光源作为投影系统的光源时，由于激光的高相干性会造成激光束自身产生光斑干涉(自相干)，激光束产生自相干的条件是：激光频率相同、振动方向一致和相位差恒定。光斑干涉会导致在激光出射光斑旁边形成亮度不均匀的杂光，称为激光散斑，激光散斑现象会影响投影的成像效果。
因此，需要提供一种可通过改变部分激光束的振动方向消除激光散斑现象的消散斑装置、激光光源及激光投影系统。
发明内容
本实用新型的目的在于提供一种消散斑装置、激光光源及激光投影系统，以通过改变整体激光束中部分激光束的偏振态消除激光散斑现象。
为达到上述目的，本实用新型采用下述技术方案：
本实用新型公开一种消散斑装置，包括分别位于激光束光路的波片和透射片，所述波片与透射片折射率相近且相邻侧紧贴设置，所述波片布置为入射面使部分入射激光束通过，所述透射片布置为入射面使其余入射激光束通过，所述部分入射激光束占入射激光束的25％-75％。
优选地，所述部分入射激光束占入射激光束的50％。
优选地，所述波片为半波片。
优选地，所述波片与透射片的相邻侧粘接固定。
优选地，所述波片为矩形、半圆形或半椭圆形波片，相应的，所述透射片为矩形、半圆形或半椭圆形透射片。
优选地，所述波片为中间开孔的环形波片，所述透射片为与所述开孔形状匹配的透射片。进一步优选地，所述波片为中间具有中心对称形状开孔的环形波片。进一步优选地，所述波片为中间具有圆形开孔的环形波片。
本实用新型还公开一种激光光源，包括出射激光束的激光器，还包括上述消散斑装置。
本实用新型还公开一种激光投影系统，包括上述激光光源。
本发明的有益效果如下：
本实用新型所述技术方案通过波片改变整体激光束中部分激光束的振动方向(或者说偏振态)消除激光散斑现象，从而消除了激光散斑现象对激光成像画面的影响。进一步，本实用新型所述技术方案通过透射片避免在激光束未垂直入射进波片的入射面时由于波片的侧面对激光束的折射造成的杂散光，从而消除了可能出现的杂散光对激光成像画面的影响。另外，本实用新型所述技术方案体积小、结构简单、可靠性高。
附图说明
下面结合附图对本发明的具体实施方式作进一步详细的说明；
图1示出消散斑装置的剖面图。
图2示出只采用波片而未采用透射片的剖面图。
图3示出采用一种替代方式的消散斑装置的剖面图。
具体实施方式
为了更清楚地说明本实用新型，下面结合优选实施例和附图对本实用新型做进一步的说明。附图中相似的部件以相同的附图标记进行表示。本领域技术人员应当理解，下面所具体描述的内容是说明性的而非限制性的，不应以此限制本实用新型的保护范围。
如图1所示，本实施例提供的消散斑装置，包括分别位于激光束光路的波片100和透射片200，波片100与透射片200折射率相近，波片100与透射片200相邻侧紧贴设置，波片100布置为波片100的入射面使部分入射激光束通过，透射片200布置为透射片200的入射面使其余入射激光束通过，部分入射激光束占入射激光束的25％-75％，即波片100的入射面通过的部分入射激光束占整体入射激光束的25％-75％，且对应的是，透射片200的入射面通过的其余入射激光束占整体入射激光束的75％-25％。
通过本实施例提供的消散斑装置，一方面，通过波片100的入射面的部分入射激光束由波片100改变了振动方向(或者说偏振态)，而通过透射片200的入射面的其余激光束或者说未通过波片100的入射面的其余激光束未改变振动方向(或者说偏振态)。因此，本实施例提供的消散斑装置将入射激光束分为两部分振动方向(或者说偏振态)不同的激光束，而由于两部分激光束的振动方向(或者说偏振态)不同，两部分激光束之间不会形成干涉， 因此也就消除了入射激光束的激光散斑现象，从而消除了激光散斑现象对激光成像画面的影响。另一方面，如果只设置波片100而未设置透射片200，当入射激光束未垂直入射进波片100的入射面时，会有一部分激光束由波片100的侧面入射，如图2所示。由波片100的入射面入射的部分激光束经过波片100的入射面和出射面的两次折射后，其光路传播方向并未改变。但是，由波片100的侧面入射的一部分激光束在经过波片100的侧面时产生折射的角度与由入射波片100的入射的部分激光束在经过波片100的入射面时产生折射的角度不同，导致由波片100的侧面入射的一部分激光束经过波片100的出射面的再次折射后，出射方向发生偏转，导致整体激光束出现杂散光，影响整体激光束的合束并对对激光成像画面造成影响。而通过如图1所示的本实施例提供的消散斑装置，当入射激光束未垂直入射进波片100的入射面时，由于波片100与透射片200相邻侧紧贴设置，由波片100的侧面入射的一部分激光束先经过透射片200的入射面和侧面的两次折射，由于波片100与透射片200折射率相近，这一部分激光束在经过波片100的出射面的再次折射后出射方向不会发生偏转，即与其他部分激光束相同，也就是，本实施例提供的消散斑装置出射的整体出射激光束与入射进本实施例提供的消散斑装置的整体入射激光束光路传播方向相同。因此，本实施例提供的消散斑装置避免了在激光束未垂直入射进波片100的入射面时由于波片100的侧面对激光束的折射造成的杂散光，从而消除了可能出现的杂散光对激光成像画面的影响。
在具体实施时，部分入射激光束占入射激光束的50％。这样可改变整体入射激光束中一半激光束的偏振态，使得整体入射激光束未改变偏振态的部分激光束和改变了偏振态的部分激光束各占整体入射激光束的一半，消除入射激光束的激光散斑现象的效果更佳。
在具体实施时，波片100为半波片。这样可使得改变偏振态的部分激光束与未改变偏振态的其余激光束之间的振动方向垂直，消除入射激光束的激光散斑现象的效果更佳。例如，当入射激光束为S态线偏振光束时，改变偏振态的部分激光束变为P态线偏振光，未改变偏振态的其余激光束还是S态线偏振光束，因为P态线偏振光束和S态线偏振光束的振动方向互相垂直，两者之间不会形成干涉，因此也就消除了入射激光的激光散斑现象。同理，当入射激光束为P态线偏振光时，入射激光束的部分激光转变为S态线偏振光，同样可消除入射激光的激光散斑现象。
在具体实施时，波片100与透射片200的相邻侧粘接固定。
在具体实施时，作为一种优选的方式，波片100为矩形、半圆形或半椭圆形波片，相应的，透射片200为矩形、半圆形或半椭圆形透射片，即波片100和透射片200均为矩形，或两者均为半圆形(半圆形的平面侧紧贴设置)，或两者均为半椭圆形(半椭圆形的平面侧紧贴设置)。当然，上述优选的形状是为了便于制备及便于波片100和透射片200紧贴设置，除上述优选的形状之外，波片100和透射片200也可以是其他形状，两者的形状也可以不同。
在具体实施时，作为另一种优选的方式，波片100为中间开孔的环形波片，透射片200为与该开孔形状匹配的透射片，本领域人员可以理解的是，此时“波片100与透射片200相邻侧紧贴设置”意味着环形波片的开孔的内侧表面与与开孔匹配的透射片的外侧表面紧贴设置。进一步优选地是，波片100为中间具有中心对称形状开孔的环形波片，相应的，透射片200为与该中心对称形状开孔形状匹配的中心对称形状透射片。更为优选地是，如图3所示，波片100为中间具有圆形开孔的环形波片，相应的，透射片200为与该圆形开孔形状匹配的圆形透射片。
在具体实施时，该消散斑装置还可包括位于波片100和透射片200的出射光路上的光阑。进一步，波片100和透射片200均与光阑在光路方向上紧贴设置，这样使得光阑的限制入射激光束的效果更佳，且使得消散斑装置的小型化成为可能，可节省空间、减小装置的整体体积。
进一步，本实施例提供了一种激光光源，包括出射激光束的激光器和上述消散斑装置，激光器出射的激光束经过上述消散斑装置后即可消除激光散斑现象。
进一步，本实施例还提供了一种包括上述激光光源的激光投影系统。
在本实用新型的描述中，需要说明的是，术语“上”、“下”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本实用新型中的具体含义。
还需要说明的是，在本实用新型的描述中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一 定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
显然，本实用新型的上述实施例仅仅是为清楚地说明本实用新型所作的举例，而并非是对本实用新型的实施方式的限定，对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动，这里无法对所有的实施方式予以穷举，凡是属于本实用新型的技术方案所引伸出的显而易见的变化或变动仍处于本实用新型的保护范围之列。

Claims (10)

  1. 一种消散斑装置，其特征在于，包括分别位于激光束光路的波片和透射片，所述波片与透射片折射率相近且相邻侧紧贴设置，所述波片布置为入射面使部分入射激光束通过，所述透射片布置为入射面使其余入射激光束通过，所述部分入射激光束占入射激光束的25％-75％。
  2. 根据权利要求1所述的消散斑装置，其特征在于，所述部分入射激光束占入射激光束的50％。
  3. 根据权利要求1所述的消散斑装置，其特征在于，所述波片为半波片。
  4. 根据权利要求1所述的消散斑装置，其特征在于，所述波片与透射片的相邻侧粘接固定。
  5. 根据权利要求1所述的消散斑装置，其特征在于，所述波片为矩形、半圆形或半椭圆形波片，相应的，所述透射片为矩形、半圆形或半椭圆形透射片。
  6. 根据权利要求1所述的消散斑装置，其特征在于，所述波片为中间开孔的环形波片，所述透射片为与所述开孔形状匹配的透射片。
  7. 根据权利要求6所述的消散斑装置，其特征在于，所述波片为中间具有中心对称形状开孔的环形波片。
  8. 根据权利要求7所述的消散斑装置，其特征在于，所述波片为中间具有圆形开孔的环形波片。
  9. 一种激光光源，包括出射激光束的激光器，其特征在于，还包括如权利要求1-8中任一项所述的消散斑装置。
  10. 一种激光投影系统，其特征在于，包括如权利要求9所述的激光光源。
PCT/CN2017/115238 2017-11-22 2017-12-08 消散斑装置、激光光源及激光投影系统 Ceased WO2019100451A1 (zh)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207457624U (zh) * 2017-11-22 2018-06-05 歌尔科技有限公司 消散斑装置、激光光源及激光投影系统
CN110928123A (zh) * 2018-09-19 2020-03-27 青岛海信激光显示股份有限公司 一种激光器阵列、激光光源及激光投影设备
WO2020057124A1 (zh) 2018-09-19 2020-03-26 青岛海信激光显示股份有限公司 一种激光器阵列、激光光源及激光投影设备
CN112015038A (zh) * 2019-05-31 2020-12-01 深圳光峰科技股份有限公司 光源系统及应用其的投影设备
CN113341639A (zh) * 2021-05-31 2021-09-03 青岛海信激光显示股份有限公司 三色激光光源及投影设备
CN113425252B (zh) * 2021-06-18 2023-03-17 耀视(苏州)医疗科技有限公司 一种眼球扫描图像阴暗不均的处理方法以及处理系统
CN116047847A (zh) * 2022-12-28 2023-05-02 深圳市火乐科技发展有限公司 光源装置及投影机

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070223091A1 (en) * 2006-03-27 2007-09-27 Texas Instruments Incorporated System and method for laser speckle reduction
US20090174941A1 (en) * 2008-01-09 2009-07-09 Fujifilm Corporation Optical device
CN101493582A (zh) * 2009-02-23 2009-07-29 福州高意通讯有限公司 一种消激光散斑的光学结构
US20120062848A1 (en) * 2010-09-08 2012-03-15 Asahi Glass Company, Limited Projection type display apparatus
CN103323958A (zh) * 2013-06-22 2013-09-25 夏云 基于正交偏振合成的散斑消除装置
CN103376636A (zh) * 2012-04-26 2013-10-30 索尼公司 显示单元和照明装置
CN104614867A (zh) * 2010-09-03 2015-05-13 青岛海信电器股份有限公司 旋光器以及基于旋光器的激光散斑抑制装置与方法
CN107193132A (zh) * 2017-06-30 2017-09-22 山西大学 一种基于偏振态调制的等光强光分束消散斑方法及装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008139838A (ja) * 2006-10-13 2008-06-19 Thomson Licensing 複数の参照光を用いたホログラフィック記憶システム

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070223091A1 (en) * 2006-03-27 2007-09-27 Texas Instruments Incorporated System and method for laser speckle reduction
US20090174941A1 (en) * 2008-01-09 2009-07-09 Fujifilm Corporation Optical device
CN101493582A (zh) * 2009-02-23 2009-07-29 福州高意通讯有限公司 一种消激光散斑的光学结构
CN104614867A (zh) * 2010-09-03 2015-05-13 青岛海信电器股份有限公司 旋光器以及基于旋光器的激光散斑抑制装置与方法
US20120062848A1 (en) * 2010-09-08 2012-03-15 Asahi Glass Company, Limited Projection type display apparatus
CN103376636A (zh) * 2012-04-26 2013-10-30 索尼公司 显示单元和照明装置
CN103323958A (zh) * 2013-06-22 2013-09-25 夏云 基于正交偏振合成的散斑消除装置
CN107193132A (zh) * 2017-06-30 2017-09-22 山西大学 一种基于偏振态调制的等光强光分束消散斑方法及装置

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