WO2023005674A1 - 一种光源系统 - Google Patents

一种光源系统 Download PDF

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Publication number
WO2023005674A1
WO2023005674A1 PCT/CN2022/105599 CN2022105599W WO2023005674A1 WO 2023005674 A1 WO2023005674 A1 WO 2023005674A1 CN 2022105599 W CN2022105599 W CN 2022105599W WO 2023005674 A1 WO2023005674 A1 WO 2023005674A1
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WO
WIPO (PCT)
Prior art keywords
light
scattering
wavelength
light source
splitting
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PCT/CN2022/105599
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English (en)
French (fr)
Inventor
陈红运
罗伟欢
Original Assignee
深圳光峰科技股份有限公司
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Priority to US18/576,836 priority Critical patent/US20240329506A1/en
Publication of WO2023005674A1 publication Critical patent/WO2023005674A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2053—Intensity control of illuminating light
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light

Definitions

  • the invention relates to the field of optical technology, in particular to a light source system.
  • the present application provides a light source system, including a light source, a light splitting and combining component, a scattering component, and a uniform light component
  • the light source includes a plurality of laser diodes or a laser diode array for generating laser light, and the laser light Including at least a first wavelength light and a second wavelength light, the first wavelength light and the second wavelength light have different colors or different wavelengths
  • the light splitting and combining components are used to combine the laser light to form a combined light beam
  • the scattering assembly is used to scatter and homogenize the combined light beam, the scattering assembly includes a first scattering element and a second scattering element, and the first scattering element and the second scattering element are set independently;
  • the homogenizing element is located between the scattering component and the light splitting and combining component or behind the scattering component or between the first diffusing element and the second diffusing element, and is used for homogenizing the light beam incident on the homogenizing element.
  • two scattering elements are set in the optical path of the laser diode array or multiple laser diodes to realize the simultaneous scattering of multi-color laser by the two scattering elements.
  • one scattering element is provided for each laser diode, and the present application scatters the combined light beam, which can reduce the volume of the light source system.
  • FIG. 1 is a schematic diagram of a light source system according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a light source system according to another embodiment of the present application.
  • FIG. 3 is a schematic diagram of a light source system according to another embodiment of the present application.
  • FIG. 4 is a schematic diagram of a light source system according to another embodiment of the present application.
  • Fig. 5 is a schematic diagram of a light source system according to another embodiment of the present application.
  • a light source system 1 including a light source 10, a light splitting and combining component 11, a scattering component 12, and a uniform light element 13, wherein,
  • the light source 1 includes a plurality of laser diodes or laser diode arrays for generating laser light, the laser light includes at least a first wavelength light and a second wavelength light, and the first wavelength light and the second wavelength light have different colors or different wavelengths; the color Refers to the red, green, blue, yellow, orange and other colors that can be distinguished by conventional vision; the wavelength refers to the specific wavelength range or dominant wavelength.
  • the light splitting and combining component 11 is used to combine the laser light to form a combined light beam
  • the scattering component 12 is used to scatter and homogenize the composite light beam, the scattering component 12 includes a first scattering element 120 and a second scattering element 122, and the first scattering element 120 and the second scattering element 122 are independently arranged;
  • the homogenizing element 13 is used for homogenizing the light beam incident to the homogenizing element 13 .
  • the light homogenizing element 13 is located behind the scattering component 12 .
  • the combined light beam is incident on the scattering component 12 and transmitted out of the scattering component 12 .
  • the propagation direction of the light scattered by the scattering component 12 changes, thereby breaking up the superposition phenomenon of peaks or troughs in the process of light propagation, eliminating the coherence of the laser light, and realizing speckle dissipation.
  • the light beam is transmitted through the scattering component 12 and then enters the homogenization element 13 for homogenization.
  • the laser beam first passes through the scattering component 12 and then passes through the uniform light element 13 to achieve a better uniform light effect. Dodging effect.
  • the uniform light element 13 is located between the first scattering element 120 and the second scattering element 122 of the scattering component 12 .
  • the combined light beam is incident on the first scattering element 120, and the propagation direction of the light transmitted out of the first scattering element 120 changes after being scattered, thereby breaking up the superposition phenomenon of peaks or troughs in the process of light propagation, and eliminating the coherence of laser light , so as to achieve speckle dissipation.
  • the laser beam is first scattered by the first scattering element 120 , then diffused by the uniform light element 13 , and finally diffused by the second scattering element 122 , so as to better achieve the light uniform effect and the speckle elimination effect.
  • the light homogenizing element 13 is located between the scattering component 12 and the light splitting and combining component 12 .
  • the combined light beam is incident on the uniform light element 13 for uniform light, and the uniform light output beam is incident on the scattering component 12, and the light transmitted out of the scattering component 12 is scattered by the scattering component 12, and the direction of propagation changes, thereby breaking up It eliminates the superposition phenomenon of peaks or troughs in the process of light propagation, eliminates the coherence of laser light, and avoids speckles.
  • the independent arrangement of the first scattering element 120 and the second scattering element 122 means that the first scattering element 120 and the second scattering element 122 are not integrally and continuously arranged from the same material.
  • an air gap is set between the first scattering element 120 and the second scattering element 122
  • an optical element is set between the first scattering element 120 and the second scattering element 122 .
  • the optical element is, for example, a lens, a third scattering element whose scattering property is weaker than that of the first scattering element 120 and the second scattering element 122 , and the like.
  • the present invention sets two independent scattering elements, and by setting the thickness of the scattering elements, it is possible to make the thickness of the two scattering elements equal to the thickness of one traditional scattering element, so that the scattered light passing through the first scattering element can be absorbed by the first scattering element After scattering, most of the transmission along the optical path is not reflected back to the light source to cause loss; when the light passing through the first scattering element passes through the second scattering element, it can also make most of the light passing through the second scattering element shoot. Compared with setting a scattering element with a thicker thickness, it can emit more light while having a better scattering effect, thereby improving the light efficiency.
  • multiple laser diodes which can be set as a row of laser diodes, or as “L"-shaped laser diodes.
  • the "L"-shaped laser diodes are arranged through the optical path design. Can emit parallel beams or non-parallel beams.
  • the polychromatic laser light is scattered.
  • the two scattering elements can simultaneously scatter the multicolor laser light, on the one hand, the effect of dispersing the speckle can be achieved while ensuring the light efficiency; on the other hand, relative to the setting of each laser diode A scattering element, the present application scatters the composite light beam, which can reduce the volume of the light source system.
  • the scattering element is arranged downstream of the optical path of the combined light beam in the above embodiment, which reduces the volume of the device.
  • the scattering element In order to effectively eliminate speckle, the scattering element needs to reach a certain thickness, for example, the thickness is greater than 1 cm.
  • the scattering thickness of the scattering element for example, transmissive type
  • the first scattering element 120 and the second scattering element 122 are set independently, on the premise of satisfying the scattering thickness, the optical loss of the light beam incident on the first scattering element 120 is reduced, and the light beam exits the first scattering element 120 and enters the second scattering element 120.
  • the optical loss of the light beam of the scattering element 122 is also reduced. Since the light beam has not been scattered in the gap between the first scattering element 120 and the second scattering element 122, or there are fewer scattering particles, compared with a single scattering element with the same overall thickness, the independently arranged first scattering element 110 and the second scattering element 112 can reduce light escaping from the light incident side of the scattering element, thereby reducing light loss.
  • the light source system 1 further includes a light concentrating element 14 for converging the combined light beam.
  • the light concentrating element 14 is located between the first scattering element 120 and the second scattering element 122 .
  • the condensing element 14 conventionally uses a condensing lens, a convex lens, a concave-convex mirror, and a combination thereof to achieve the function of converging or collimating light.
  • the emission direction of the light beam scattered and transmitted by the first scattering element 120 is relatively divergent, and the light beam is converged by the light-concentrating element 14, so that as many light beams as possible from the first scattering element 120 can be incident on the second light beam.
  • the scattering element 122 can further reduce light loss.
  • the output focal point of the light concentrating element 14 falls into the scattering area of the second scattering element 120 .
  • the light concentrating element 14 may also be located between the light homogenizing element 13 and the second scattering element 122 , or between the light splitting and combining assembly 11 and the first scattering element 120 .
  • the dodging element 13 is a square rod.
  • the light homogenizing element 13 is a compound eye.
  • the scattering area of the second scattering element 122 is larger than the scattering area of the first scattering element 120, so that the light beam emitted from the first scattering element 120 can fall into the second scattering element 122 even though the outgoing direction diverges. the scattering area.
  • both the first scattering element 120 and the second scattering element 122 are transmissive scattering elements. In some alternative embodiments, at least one of the first scattering element 120 and the second scattering element 122 is a reflective scattering element.
  • the first scattering element 120 includes a scattering layer made of a scattering material.
  • the first scattering element 120 includes a scattering layer made of a scattering material, and the scattering layer includes white scattering particles, wherein the white scattering particles may include at least one of titanium dioxide and aluminum dioxide.
  • the second scattering element 122 is movable relative to the light source. During the movement of the second scattering element 122, when the combined light beam is incident on the second scattering element 122, it will be incident on different areas of the second scattering element 122, and the different areas may have overlapping areas, or there may be no overlapping areas at all. overlapping areas. In addition, at least some of the different regions are scattering regions. It should be noted that the "scattering region" mentioned in the text refers to a region where a scattering medium is distributed and can scatter an incident light beam. By moving the second scattering element 122 , the scattering area where the light beam is scattered will change, so that a certain area will not be in a working state all the time, thereby avoiding local overheating of the second scattering element 122 .
  • both the first scattering element 120 and the second scattering element 122 are fixed scattering elements; in still other alternative embodiments, both the first scattering element 120 and the second scattering element 122 can move. In the embodiment shown in FIGS. 1-5 , the first scattering element 120 is a fixed scattering element, and the second scattering element 122 is movable relative to the light source.
  • the second scattering element 122 includes a transmissive substrate and a scattering material layer, and the scattering material layer is disposed on the transmissive substrate.
  • the scattering material layer is arranged on the light-incident side or the light-outside of the transmissive substrate, in other words, the scattering material layer is arranged on the side of the transmissive substrate facing the combined light beam or the side facing away from the combined light beam; the scattering material layer It can also be arranged inside the transmissive substrate.
  • the material of the scattering material layer may be scattering powder or glue, such as silica gel.
  • the transmissive substrate includes polymer material boards, such as PC (Polycarbonate, polycarbonate) boards and acrylic boards.
  • PC Polycarbonate, polycarbonate
  • the second scattering element 122 movable relative to the light source moves around an axis, and the light beam incident on the second scattering element 122 is distributed on the second scattering element 122 around the axis.
  • the transmissive substrate is provided with a rotation shaft that rotates around an axis, and the second scattering element 122 rotates around the axis driven by the rotation shaft.
  • the second scattering element 122 that is movable relative to the light source reciprocates in the direction of the optical axis, and during the reciprocating movement, the area incident on the second scattering element 122 also changes accordingly. Regardless of whether the second scattering element 122 moves around the axis or moves relative to the light source in the direction of the optical axis, the scattering material layer may only be provided at the region where the laser light is incident on the second scattering element 122 .
  • the thickness of the scattering material required for laser scattering is the standard scattering thickness
  • the equivalent thickness of the scattering layer of the first scattering element 120 is the same as that of the second scattering layer.
  • the equivalent thickness of the scattering material layer of the material 122 is respectively less than the standard scattering thickness, and the sum of the equivalent thickness of the scattering layer of the first scattering element 120 and the equivalent thickness of the scattering material layer of the second scattering material 122 is not less than the standard Scatter thickness.
  • the equivalent thickness here represents the thickness of the scattering material required to achieve the standard distribution, material and density under the same scattering effect.
  • the scattering thickness required for effective laser scattering is P
  • the standard thickness is Q ⁇
  • the scattering effect of scattering material A with standard distribution, material and density with thickness Q ⁇ is equal to the scattering effect of scattering material B with non-standard distribution, material and density with thickness Q.
  • Q Q′
  • the "standard distribution, material and density” here may be any combination of distribution, material and density.
  • the thickness of the scattering layer of the first scattering element 120 is ⁇ 1 cm.
  • the thickness of the scattering layer satisfies ⁇ 1 cm, at least part of the light beam incident on the first scattering element 120 can exit from the light exit side of the first scattering element 120 .
  • the thickness of the scattering layer is ⁇ 0.5 cm; more preferably, the thickness of the scattering layer is ⁇ 0.2 cm, which can ensure more outgoing light. Further, the thickness of the scattering layer is ⁇ 0.1cm.
  • the thickness of the scattering material layer of the second scattering element 122 is ⁇ 1 cm.
  • the thickness of the scattering material layer satisfies ⁇ 1 cm, at least part of the light beam incident on the second scattering element 122 can exit from the light exit side of the second scattering element 122 .
  • the thickness of the scattering material layer is ⁇ 0.5 cm; more preferably, the thickness of the scattering material layer is ⁇ 0.2 cm, which can ensure more outgoing light. Further, the thickness of the scattering material layer is ⁇ 0.1 cm.
  • the present invention adopts two independently arranged scattering elements, and a focusing lens and other components are arranged in the middle.
  • Scattering elements which can ensure the least light loss due to scattering, and at the same time control the thickness of the scattering sheet, so that the emitted light can not only dissipate the speckles, but also minimize the loss of light.
  • the light source 10 of the present invention may include a laser diode array, and the laser diode array includes at least one laser diode among red laser diodes, green laser diodes, and blue laser diodes.
  • the laser diode array generates laser light, and the laser light may include laser light with a first wavelength, a second wavelength, and a third wavelength. More preferably, the laser diode array includes laser diodes of at least two colors of red laser diodes, green laser diodes, and blue laser diodes.
  • the light source 10 of the present invention may further include a first light source 100 , a second light source 102 and a third light source 104 .
  • the first light source 100 can be any one of a plurality of red laser diodes, green laser diodes, blue laser diodes, and yellow laser diodes, which emit laser light of the first wavelength.
  • the second light source 102, the third light source 104 can also be any one of a plurality of red laser diodes, green laser diodes, blue laser diodes, and yellow laser diodes, which respectively emit laser light of the second wavelength and the third wavelength.
  • the foregoing laser light includes light of a first wavelength, light of a second wavelength and light of a third wavelength, and the wavelengths of the three wavelengths of light are different or their main wavelengths are different. For example, it may be red light, green light, or blue light.
  • the light splitting and combining component 11 also includes a reflector 110, a first splitting and combining element 112, and a second splitting and combining element 114;
  • the light of the first wavelength is reflected by the reflector 110, and transmits the first light splitting and combining element 112 and the second light splitting and combining element 114 to form the outgoing light of the first wavelength;
  • the light of the second wavelength is reflected by the first light splitting and combining element 112 and transmitted through the second light splitting and combining element 114 to form the second wavelength outgoing light;
  • the third wavelength light is reflected by the second light splitting and combining element 114 to form the third wavelength outgoing light;
  • the outgoing light of the first wavelength, the outgoing light of the second wavelength and the outgoing light of the third wavelength form the combined light beam.
  • the reflector 110 has the property of reflecting light of the first wavelength.
  • the first light splitting and combining element 112 has the property of transmitting light of the first wavelength and reflecting light of the second wavelength.
  • the second spectroscopic and plenoptic element 114 has the property of transmitting the light of the first wavelength and the light of the second wavelength, and reflecting the light of the third wavelength.
  • the light of the first wavelength, the light of the second wavelength and the light of the third wavelength respectively emitted by the first light source 100, the second light source 102 and the third light source 104 will be due to the Due to structural reasons, the overall beam width cannot be set too narrow.
  • the overall width of the first light source 100, the second light source 102, and the third light source 104 is x
  • the light sources emitted by the three light sources are parallel, the first wavelength light, second wavelength light, and The maximum distance between the optical axes of the light of the third wavelength will not be smaller than x. Since the beam has a certain width, the overall beam must be greater than x.
  • the reflector 110 By setting the reflector 110, the first light splitting and combining element 112, and the second light splitting and combining element 114, the overall width of the first wavelength light, the second wavelength light and the third wavelength light can be narrowed, and this result can also be seen from Fig. 1-5 are reflected.
  • the directions of the first wavelength light, the second wavelength light and the third wavelength light are the same; the directions of the first wavelength outgoing light, the second wavelength outgoing light and the third wavelength outgoing light are the same.
  • the maximum distance between the optical axis of the first wavelength outgoing light, the optical axis of the second wavelength outgoing light and the optical axis of the third wavelength outgoing light on the plane perpendicular to the first wavelength outgoing light is smaller than the first light source , the maximum distance between the second light source and the third light source on a plane perpendicular to the first wavelength light.
  • the directions of the light of the first wavelength, the light of the second wavelength and the light of the third wavelength may also be different, for example, the light of the first wavelength, the light of the second wavelength and the light of the third wavelength may respectively enter After passing through a collimator, the emitted light is respectively incident into the reflector 110 , the first light splitting and combining element 112 , and the second light splitting and combining element 114 .
  • the directions of the first wavelength outgoing light, the second wavelength outgoing light and the third wavelength outgoing light can also be different, for example, the first wavelength outgoing light, the second wavelength outgoing light and the third wavelength outgoing light respectively enter To a collimator to achieve the parallel effect.
  • the optical axis of the first wavelength outgoing light, the optical axis of the second wavelength outgoing light and the optical axis of the third wavelength outgoing light coincide.
  • the point where the first wavelength light is transmitted to the first light splitting and combining element 112 coincides with the point where the second wavelength light is incident on the first splitting and combining element 112; the first wavelength light and the second wavelength light
  • the point transmitted to the second light splitting and combining element 114 coincides with the point where the third wavelength light is incident on the second light splitting and combining element 114 .
  • the optical axis of the first wavelength outgoing light, the optical axis of the second wavelength outgoing light and the optical axis of the third wavelength outgoing light coincide, the first wavelength outgoing light, the second wavelength outgoing light and the third wavelength outgoing light
  • the beam width of the combined light formed after exiting is the narrowest.
  • the first light combining and splitting element 112 transmits blue light and reflects green light; the second light combining and splitting element 114 transmits blue light and green light and reflects red light.
  • the first light source 100 is a blue laser light source
  • the second light source 102 is a green laser light source
  • the third light source 104 is a red laser light source.
  • the light source system 1 further includes a half-wave plate 15 disposed on the light-emitting side of at least one laser diode.
  • the half-wave plate 15 Through the arrangement of the half-wave plate 15, the polarization direction of the outgoing light can be changed, so that the light splitting and combining component 11 can transmit the light of the first polarization direction and reflect the light of the second polarization direction.
  • the reflector 110 , the first light splitting and combining element 112 and the second light splitting and combining element 114 form an angle of 45 degrees with respect to the light emitting direction of the first light source 100 .
  • the first light source 100, the second light source 102, and the third light source 104 are parallel to each other. Therefore, the reflector 110, the first light splitting and combining element 112, and the second light splitting and combining element 114 are relative to the second light splitting and combining element 114.
  • the light emitting directions of the light source 102 and the third light source 104 also form an angle of 45 degrees.

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Abstract

一种光源系统，包括光源、分光合光组件、散射组件以及匀光元件，光源包括多颗激光二极管或激光二极管阵列，用于产生激光，激光包括至少第一波长光和第二波长光，第一波长光和第二波长光的颜色不同或波长不同；分光合光组件用于对激光进行合光，形成合光光束；散射组件用于对合光光束进行散射和匀光，散射组件包括第一散射元件和第二散射元件，第一散射元件和第二散射元件独立设置；匀光元件位于散射组件和分光合光组件之间或位于散射组件之后或位于第一散射元件和第二散射元件之间，用于对入射至匀光元件的光束进行匀光。本申请通过独立设置的两个散射元件对多色激光进行散射，达到散射的效果、减小光源系统的体积，并且减少了光损耗。

Description

一种光源系统 技术领域
本发明涉及光学技术领域，特别是涉及一种光源系统。
背景技术
目前，随着投影技术水平的不断提高，人们已经在投影亮度、克服环境光、视角范围等方面显著提升了观看体验。此外，投影仪因其显示尺寸大、投影位置灵活等优点，已经将应用环境从影院延伸至家庭应用环境。
由于激光二极管的高亮度，随着激光二极管的成熟，激光二极管被逐渐应用在投影、显示领域。但是由于激光二极管散斑现象特别严重，而投影、显示对显示画面的要求特别高，激光二极管在投影、显示中的应用受到了一定的障碍，为了实现激光二极管商业化，出现了一系列的消散斑的方法。其中，一种消散斑的方式为在投影和显示画面之间增加消散斑装置，该方式虽然消除了散斑，但会带来成本高、画面效果差；另一种消散斑的方式为在光源和镜头之间增加一片散射片，但为了达到消散斑的效果，散射片会导致大量的光被反射回光源的方向，从而导致出光量减少，如果需要达到同样的亮度，需要增加更多的激光二极管，从而增大了体积；为了解决上述问题，现有消散斑采用激光二极管和散射片一一对应，每一个激光二极管前设置一散射片，这样无形增加了光源设计的复杂度。
发明内容
有鉴于此，本申请提供一种光源系统，包括光源、分光合光组件、散射组件以及匀光元件，其中，所述光源包括多颗激光二极管或激光二极管阵列，用于产生激光，所述激光包括至少第一波长光和第二波长光，所述第一波长光和第二波长光的颜色不同或波长不同；所述分光合光组件用于对所述激光进行合光，形成合光光束；所述散射组件用于对所述合光光束进行散射和匀光，所述散射组件包括第一散射元件和第二散射元件，所述第一散射元件和 所述第二散射元件独立设置；所述匀光元件位于散射组件和分光合光组件之间或位于散射组件之后或位于第一散射元件和第二散射元件之间，用于对入射至所述匀光元件的光束进行匀光。
本申请在激光二极管阵列或多颗激光二极管的光路中设置两个散射元件，实现两个散射元件同时对多色激光进行散射，一方面在保证光效的情况下达到消散斑的效果；另一方面，相对于每个激光二极管设置一个散射元件，本申请对合光光束进行散射，能够减小光源系统的体积。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1所示为根据本申请一实施例的光源系统的示意图；
图2所示为根据本申请另一实施例的光源系统的示意图；
图3所示为根据本申请又一实施例的光源系统的示意图；
图4所示为根据本申请又一实施例的光源系统的示意图；以及
图5所示为根据本申请又一实施例的光源系统的示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，均属于本申请保护的范围。
根据本申请的一些实施例，如图1-3所示，公开了一种光源系统1，包括光源10、分光合光组件11、散射组件12以及匀光元件13，其中，
该光源1包括多颗激光二极管或激光二极管阵列，用于产生激光，该激光包括至少第一波长光和第二波长光，该第一波长光和第二波长光的颜色不 同或波长不同；颜色是指常规视觉可分辨的红、绿、蓝、黄、橙等颜色；波长是指具体的波长范围或者主波长。
该分光合光组件11用于对该激光进行合光，形成合光光束；
该散射组件12用于对该合光光束进行散射和匀光，该散射组件12包括第一散射元件120和第二散射元件122，该第一散射元件120和该第二散射元件122独立设置；
其中，匀光元件13用于对入射至该匀光元件13的光束进行匀光。
如图1所示的实施例中，匀光元件13位于散射组件12之后。具体地，合光光束入射至散射组件12，透射出该散射组件12。经散射组件12散射后的光线传播方向发生变化，从而打散了光传播过程中波峰或波谷的叠加现象，消除了激光的相干性，进而实现消散斑。光束透射出该散射组件12后入射至匀光元件13进行匀光。本实施例中，激光光束先经过散射组件12再经过匀光元件13更够更好的实现匀光效果，激光光束经过散射组件已经历过一次匀光，而后经过匀光元件可以实现更好的匀光效果。
如图2所示的实施例中，匀光元件13位于散射组件12的第一散射元件120和第二散射元件122之间。合光光束入射至第一散射元件120，透射出该第一散射元件120的光经散射后传播方向发生变化，从而打散了光传播过程中波峰或波谷的叠加现象，消除了激光的相干性，进而实现消散斑。光束透射出该第一散射元件120后入射至匀光元件13进行匀光，匀光输出后的光束入射至第二散射元件122，透射出该第二散射元件122的光经散射后传播方向发生变化，从而进一步消除了激光的相干性。本实施例中，激光光束先经过第一散射元件120散射，再经过匀光元件13，最后再经过第二散射元件122散射，更够更好的实现匀光效果及消散斑效果。
如图3所示的实施例中，该匀光元件13位于散射组件12和分光合光组件12之间。具体地，合光光束入射至匀光元件13进行匀光，匀光输出后的光束入射至散射组件12，透射出该散射组件12的光经散射组件12散射后传播方向发生变化，从而打散了光传播过程中波峰或波谷的叠加现象，消除了激光的相干性，避免发生散斑。
需要说明，该第一散射元件120和该第二散射元件122独立设置表示第一散射元件120和第二散射元件122并非由同一材料一体连续设置的。例如，该第一散射元件120和第二散射元件122之间设置有空气隙，或者，该第一散射元件120和第二散射元件122之间设有光学元件。在一些实施例中，该光学元件例如为透镜、散射性弱于第一散射元件120和第二散射元件122的第三散射元件等。本发明设置两个独立的散射元件，通过设置散射元件的厚度，可能使得两个散射元件的厚度等同于传统一个散射元件的厚度，从而使得经历第一散射元件的散射光能够被第一散射元件散射后绝大部分沿着光路传输的传输，而不被反射回光源导致损失；当经过第一散射元件的光再经历第二散射元件时，同样能够使得经过第二散射元件的绝大部分光出射。其相较于设置一厚度较后的散射元件而言，在起到更好的散射作用的同时能够出射更多的光，从而提高光效。
此外需要说明，“多颗激光二极管”的排列方式有很多种，可以为设置为一排激光二极管，或者设置为“L”型排列的激光二极管,该“L”型排列的激光二极管通过光路设计可发出平行光束或者不平行的光束。
在上述实施例中，由于在激光二极管阵列或多颗激光二极管的光路上设置了两个散射元件对多色激光进行散射。通过控制两个散射元件的位置厚度等，实现两个散射元件同时对多色激光进行散射，一方面在保证光效的情况下达到消散斑的效果；另一方面，相对于每个激光二极管设置一个散射元件，本申请对合光光束进行散射，能够减小光源系统的体积。相对于现有技术中的针对每一个激光二极管设计一个散射元件，上述实施例中在合光光束的光路下游设置散射元件，减少了设备体积。此外，不同波长的光的散射强度不同，为了有效实现消散斑，散射元件需要达到一定的厚度，例如厚度大于1cm。当散射元件(例如透射式)的散射厚度过大时，入射光束的一部分会无法到达散射元件的出光侧，而从散射元件的入光侧逸出，导致光损耗。本申请通过独立设置的第一散射元件120和第二散射元件122，在满足散射厚度的前提下，使得入射第一散射元件120的光束的光损耗降低，出射第一散射元件120并入射第二散射元件122的光束的光损耗亦降低。由于光束在第一散射元件 120和第二散射元件122之间的空隙没有经过散射，或者散射粒子较少，从而相比于同样总厚度的单一的散射元件而言，独立设置的第一散射元件110和第二散射元件112可以减少从散射元件的入光侧逸出的光，进而降低光损耗。
如图4所示的实施例，光源系统1还包括用于对该合光光束进行汇聚的聚光元件14。在图4所示的实施例中，该聚光元件14位于第一散射元件120和第二散射元件122之间。本领域人员知悉，聚光元件14常规采用聚光透镜、凸透镜、凹凸镜以及其组合实现光线汇聚或者准直的功能。
在上述实施例中，经第一散射元件120散射并透射的光束的出射方向较为发散，通过聚光元件14对光束进行汇聚，可以使尽可能多的从第一散射元件120出射光束入射第二散射元件122，可以进一步减少光损耗。在一些实施例，聚光元件14的出射焦点落入第二散射元件120的散射区域。
在其他一些实施例中，该聚光元件14还可以位于匀光元件13和第二散射元件122之间，或者位于分光合光组件11和第一散射元件120之间。
在一些实施例中，该匀光元件13为方棒。替换性地，该匀光元件13为复眼。
在一些实施例中，第二散射元件122的散射区域大于第一散射元件120的散射区域，从而从第一散射元件120出射的光束虽然出射方向发散，但均可以落入至第二散射元件122的散射区域。
在一些实施例中，第一散射元件120和第二散射元件122均为透射式散射元件。在一些替换实施例中，第一散射元件120和第二散射元件122中的至少一项为反射型散射元件。
在一些实施例中，第一散射元件120包括散射材料制成的散射层。
在一些实施例中，第一散射元件120包括散射材料制成的散射层，该散射层包括白色散射粒子，其中该白色散射粒子可以包括二氧化钛、二氧化铝中的至少一项。
在一些实施例中，该第二散射元件122相对光源可移动。在第二散射元件122移动过程中，合光光束在入射至第二散射元件122时，会入射至第二散射元件122的不同区域，该不同区域之间可以具有交叠区域，也可以完全 没有交叠区域。此外，该不同区域中至少有一部分为散射区域。需要说明的是，文中提到的“散射区域”是表示分布有散射介质的可使入射光束发生散射的区域。通过使第二散射元件122移动，使光束发生散射的散射区域会发生变化，从而不会导致某一区域处于一直工作的状态，从而避免了第二散射元件122发生局部过热。
在一些替换性实施例中，第一散射元件120和第二散射元件122均为固定式散射元件；在又一些替换性实施例中，第一散射元件120和第二散射元件122均相对光源可移动。而在如图1-5所示的实施例中，第一散射元件120为固定式散射元件，第二散射元件122相对光源可移动。
在一些实施例中，第二散射元件122包括透射式基板和散射材料层，散射材料层设置在述透射式基板上。例如，该散射材料层设置于透射式基板的入光侧或出光侧，换言之，散射材料层设置于该透射式基板面向合光光束的一侧或者背向合光光束的一侧；散射材料层还可以设置于该透射式基板内部。散射材料层的材质可以为散射粉，也可以为胶水，如硅胶。此外，透射型基板包括高分子材料板，如PC(Polycarbonate，聚碳酸酯)板和亚克力板。然而，上述材质仅为示例性地，不构成对本申请保护范围的限制。
在一些实施例中，相对光源可移动的第二散射元件122绕轴运动，入射至第二散射元件122的光束绕轴心分布在该第二散射元件122上。非限制性地，该透射式基板上设置有绕一轴心旋转的转动轴，第二散射元件122在该转动轴驱动下绕该轴心转动。在一些实施例中，相对光源可移动的第二散射元件122在光轴方向往复运动，在往复运动过程中，入射至第二散射元件122的区域也发生相应改变。无论第二散射元件122绕轴运动还是相对光源在光轴方向运动，可以只在激光入射至该第二散射元件122的区域处设置散射材料层。
在上述实施例中，在散射材料为标准分布、材质及密度的情况下，激光实现散射所需要的散射材料厚度为标准散射厚度，第一散射元件120的散射层的等效厚度与第二散射材料122的散射材料层的等效厚度分别小于该标准散射厚度，同时第一散射元件120的散射层的等效厚度与第二散射材料122 的散射材料层的等效厚度的和不小于该标准散射厚度。需要说明的是，这里的等效厚度表示，实现相同散射效果下所需要的标准分布、材质及密度的散射材料的厚度。例如对于具有标准分布、材质及密度的散射材料A，激光实现有效散射所需要的散射厚度为P，则对于非标准分布、材质及密度的厚度为Q的散射材料B，标准厚度为Q`。其中厚度为Q`的具有标准分布、材质及密度的散射材料A的散射效果等同于非标准分布、材质及密度的厚度为Q的散射材料B。当散射材料B为散射材料为标准分布、材质及密度的散射材料时，Q＝Q`。需要说明，这里的“标准分布、材质及密度”可以是任意的分布、材质及密度组合。
在一些实施例中，第一散射元件120的散射层的厚度≤1cm。当散射层的厚度满足≤1cm时，入射至第一散射元件120的光束至少部分可从该第一散射元件120的出光侧出射。优选地，所述散射层的厚度≤0.5cm；更优选的，所述散射层的厚度≤0.2cm，可以保障更多的出射光。进一步地，所述散射层的厚度≤0.1cm。
在一些实施例中，第二散射元件122的散射材料层的厚度≤1cm。当散射材料层的厚度满足≤1cm时，入射至第二散射元件122的光束至少部分可从该第二散射元件122的出光侧出射。优选地，所述散射材料层的厚度≤0.5cm；更优选的，所述散射材料层的厚度≤0.2cm，可以保障更多的出射光。进一步地，所述散射材料层的厚度≤0.1cm。
值得说明的是：本发明采用独立设置的两个散射元件，中间设置聚焦透镜等部件，当光经过第一散射元件后，被散射成角度的光通过聚焦透镜对光进行汇聚后再进入第二散射元件，这样可以保证因为散射而损失的光最少，同时控制散射片的厚度，得出射的光不仅能够消散斑，而且光的损失最小。
本发明的光源10可以包括激光二极管阵列，该激光二极管阵列包括红色激光二极管、绿色激光二极管、蓝色激光二极管中的至少一种激光二极管。该激光二极管阵列产生激光，所述激光可以包括第一波长、第二波长、第三波长的激光。更优选的，所述激光二极管阵列包括红色激光二极管、绿色激光二极管、蓝色激光二极管种的至少两种颜色的激光二极管。
本发明的光源10还可以包括第一光源100，第二光源102和第三光源104。其中，第一光源100可以为多颗红色激光二极管，绿色激光二极管，蓝色激光二极管，黄色激光二极管中的任一种，发出第一波长的激光，同理，第二光源102、第三光源104亦可以分别为多颗红色激光二极管，绿色激光二极管，蓝色激光二极管，黄色激光二极管中的任一种，分别发出第二波长和第三波长的激光。
前述激光包括第一波长光、第二波长光和第三波长光，三种波长光的波长不同或者主波长不同。例如，可以为红光、绿光、蓝光。
该分光合光组件11还包括反射件110、第一分光合光元件112、第二分光合光元件114；
其中，该第一波长光经过该反射件110反射，并透射该第一分光合光元件112和该第二分光合光元件114，形成第一波长出射光；
该第二波长光经该第一分光合光元件112反射，并透射该第二分光合光元件114，形成第二波长出射光；
该第三波长光经该第二分光合光元件114反射，形成第三波长出射光；
该第一波长出射光、该第二波长出射光和该第三波长出射光形成该合光光束。
具体地，该反射件110具有反射第一波长光的性质。第一分光合光元件112具有透射第一波长光、反射第二波长光的性质。第二分光全光元件114具有透射第一波长光、第二波长光，并反射第三波长光的性质。
分别由第一光源100、第二光源102和第三光源104出射的第一波长光、第二波长光和第三波长光会由于第一光源100、第二光源102和第三光源104本身的结构原因而导致其整体光束宽度不能设置的太窄。例如，当第一光源100、第二光源102和第三光源104的整体宽度为x，则当三者出射的光源平行时，则三个光源出射的该第一波长光、第二波长光、第三波长光的光轴之间的最大距离就不会小于x。由于光束具有一定宽度，因此整体光束必然是大于x的。通过设置反射件110、第一分光合光元件112、第二分光合光元件114， 可以收窄第一波长光、第二波长光和第三波长光的整体宽度，这一结果也可以从图1-5中得到体现。
在一些实施例中，该第一波长光、该第二波长光和该第三波长光的方向相同；该第一波长出射光、该第二波长出射光和该第三波长出射光的方向相同；该第一波长出射光的光轴、该第二波长出射光的光轴和该第三波长出射光的光轴在垂直于该第一波长出射光的平面上的最大距离小于该第一光源、该第二光源和该第三光源在垂直于该第一波长光的平面上的最大距离。
然而，在其他实施例中，该第一波长光、该第二波长光和该第三波长光的方向也可以不同，例如，第一波长光、第二波长光和第三波长光可分别入射至一准直器，出射后的光线再分别入射至反射件110、第一分光合光元件112、第二分光合光元件114中。同样地，第一波长出射光、该第二波长出射光和该第三波长出射光的方向也可以不同，例如第一波长出射光、该第二波长出射光和该第三波长出射光分别入射至一准直器实现平行效果。
在一些实施例中，该第一波长出射光的光轴、该第二波长出射光的光轴和该第三波长出射光的光轴重合。换言之，该第一波长光透射至该第一分光合光元件112的点与该第二波长光入射至该第一分光合光元件112的点重合；该第一波长光和该第二波长光透射至该第二分光合光元件114的点与该第三波长光入射至该第二分光合光元件114的点重合。当该第一波长出射光的光轴、该第二波长出射光的光轴和该第三波长出射光的光轴重合时，第一波长出射光、第二波长出射光和第三波长出射光出射后形成的合光的光束宽度最窄。
在一些实施例中，该第一合光分光元件112透射蓝光，反射绿光；该第二合光分光元件114透射蓝光和绿光，反射红光。对应地，第一光源100为蓝色激光光源，第二光源102为绿色激光光源，第三光源104为红色激光光源。
在如图5所示的实施例中，该光源系统1还包括半波片15，该半波片15设置于至少一颗该激光二极管的出光侧。通过半波片15的设置，可实现出射 光偏振方向的改变，从而使分光合光组件11可以透射第一偏振方向的光，并反射第二偏振方向的光。
在一些实施例中，该反射件110、该第一分光合光元件112和该第二分光合光元件114相对于该第一光源100的光发射方向呈45度角。在一些实施例中，第一光源100、第二光源102、第三光源104相互平行，因此，反射件110、该第一分光合光元件112和该第二分光合光元件114相对于第二光源102、第三光源104的光发射方向亦呈45度角。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (12)

  1. 一种光源系统，其特征在于，包括光源、分光合光组件、散射组件以及匀光元件，其中，
    所述光源包括多颗激光二极管或激光二极管阵列，用于产生激光，所述激光包括至少第一波长光和第二波长光，所述第一波长光和第二波长光的颜色不同或波长不同；
    所述分光合光组件用于对所述激光进行合光，形成合光光束；
    所述散射组件用于对所述合光光束进行散射和匀光，所述散射组件包括第一散射元件和第二散射元件，所述第一散射元件和所述第二散射元件独立设置；
    所述匀光元件位于散射组件和分光合光组件之间或位于散射组件之后或位于第一散射元件和第二散射元件之间，用于对入射至所述匀光元件的光束进行匀光。
  2. 根据权利要求1所述的光源系统，其特征在于，还包括用于对所述合光光束进行汇聚的聚光元件，所述聚光元件位于第一散射元件和第二散射元件之间。
  3. 根据权利要求1所述的光源系统，其特征在于，所述第一散射元件包括散射材料制成的散射层，所述散射层的厚度≤1cm。
  4. 根据权利要求1所述的光源系统，其特征在于，所述第一散射元件包括散射材料制成的散射层，所述散射层包括白色散射粒子；所述散射层的厚度≤0.2cm。
  5. 根据权利要求1所述的光源系统，所述第二散射元件相对光源可移动。
  6. 根据权利要求5所述的光源系统，其述第二散射元件包括透射式基板和散射材料层，所述散射材料层设置在所述透射式基板上。
  7. 根据权利要求5所述的光源系统，其特征在于，所述第二散射元件绕轴运动或者在光轴方向往复运动。
  8. 根据权利要求1所述的光源系统，其特征在于，所述光源为激光二极管阵列，所述激光二极管阵列包括红色激光二极管、绿色激光二极管、蓝色激光二极管中的至少两种。
  9. 根据权利要求1所述的光源系统，其特征在于，所述激光包括第一波长光、第二波长光和第三波长光；
    所述分光合光组件还包括反射件、第一分光合光元件、第二分光合光元件；
    其中，所述第一波长光经过所述反射件反射，并透射所述第一分光合光元件和所述第二分光合光元件，形成第一波长出射光；
    所述第二波长光经所述第一分光合光元件反射，并透射所述第二分光合光元件，形成第二波长出射光；
    所述第三波长光经所述第二分光合光元件反射，形成第三波长出射光；
    所述第一波长出射光、所述第二波长出射光和所述第三波长出射光形成所述合光光束。
  10. 根据权利要求9所述的光源系统，其特征在于，所述第一波长出射光的光轴、所述第二波长出射光的光轴和所述第三波长出射光的光轴重合。
  11. 根据权利要求9所述的光源系统，其特征在于，所述第一合光分光元件透射蓝光，反射绿光；所述第二合光分光元件透射蓝光和绿光，反射红光。
  12. 根据权利要求1或8所述的光源系统，其特征在于，所述光源系统还包括半波片，所述半波片设置于至少一颗所述激光二极管的出光侧。
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