WO2020125302A1 - 光源改善装置 - Google Patents

光源改善装置 Download PDF

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Publication number
WO2020125302A1
WO2020125302A1 PCT/CN2019/119152 CN2019119152W WO2020125302A1 WO 2020125302 A1 WO2020125302 A1 WO 2020125302A1 CN 2019119152 W CN2019119152 W CN 2019119152W WO 2020125302 A1 WO2020125302 A1 WO 2020125302A1
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Prior art keywords
component
collection lens
light source
focusing
lens group
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PCT/CN2019/119152
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English (en)
French (fr)
Inventor
侯海雄
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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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
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • 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, and more particularly, to a light source improvement device.
  • a new generation of light source based on the use of laser phosphor technology, further develops the technology of using red laser plus fluorescence.
  • the red solid-state light source emits red laser light.
  • the brightness of the light and the color of the laser are used to make the color space of the light source larger.
  • And further improve the brightness of the light source at the same time can also improve the efficiency of the optomechanism, to achieve adjustable color rendering and adjustable brightness of the light source.
  • the utility model proposes a light source improvement device, which can improve or even eliminate the light spot effect by adjusting the positions of the lens and focusing assembly which cause laser reflection in the collection lens group.
  • the embodiment of the utility model provides a light source improvement device, which includes a laser light source, a beam splitting component, a collection lens group, a fluorescent excitation component, a focusing component and a uniform light component.
  • the collection lens group includes at least one lens, and the laser light emitted by the laser light source.
  • the beam splitting component is incident on the collection lens group, part of the laser light is incident on the fluorescence excitation component and excites fluorescence through the collection lens group, and the laser light incident on the fluorescence excitation component and reflected by the fluorescence excitation component and the excited fluorescence sequentially pass through the collection lens group ,
  • the beam splitting component and the focusing component are incident on the uniform light component; another part of the laser light is reflected by at least one lens in the collection lens group, and then enters the uniform light component through the splitting component and the focusing component, and collects at least one of the reflecting part of the laser light in the lens group
  • the distance between the lens and the focusing component can be adjusted so that the imaging position
  • the distance between the lens farthest from the focusing component and the focusing component in the collection lens group can be adjusted.
  • the collection lens group includes a first collection lens, a second collection lens, a third collection lens, and a fourth collection lens arranged in sequence in a direction away from the focusing assembly, the fourth collection lens and the focusing The distance of the components can be adjusted.
  • the curvature of the surface of the fourth collection lens close to the side of the focusing assembly is greater than the curvature of the surface of the first collection lens, the second collection lens, and the side of the third collection lens close to the focusing assembly .
  • the refractive index of the focusing component is adjustable.
  • the collection lens group, the beam splitting component and the focusing component are coaxially arranged.
  • the beam splitting component is a beam splitter.
  • the fluorescent excitation component is a fluorescent pink wheel.
  • the focusing component is a focusing lens.
  • the light uniformity component is a light uniform square bar.
  • the light source improvement device adjusts the position of the lens and the focusing component that cause laser reflection in the collection lens group, so that the position of the image surface of the reflected laser beam forming the light spot is moved backward, thereby making the laser energy output through the uniform light component
  • the distribution is relatively uniform, to reduce or even eliminate the spot effect.
  • FIG. 1 shows a schematic structural view of a light source improvement device provided by a first embodiment of the present invention
  • FIG. 2 shows a schematic structural view of the collection lens group provided by the first embodiment of the present invention
  • FIG. 3 shows a schematic diagram when adjusting the distance between the fourth collection lens and other lenses in the collection lens group to increase
  • FIG. 4 is a schematic diagram of the optical path of the light source improvement device provided by the first embodiment of the present invention.
  • 5a is a diagram showing the energy density distribution of the spot surface before adjusting the lens pitch in the collecting lens group according to the first embodiment of the present invention
  • 5b is a diagram showing the energy density distribution of the spot surface when the distance between the fourth collection lens and other lenses in the collection lens group of the first embodiment of the present invention increases by 0.2 mm;
  • 5c is a diagram showing the energy density distribution of the spot surface when the distance between the fourth collection lens and other lenses in the collection lens group of the first embodiment of the present invention is increased by 0.5 mm;
  • 5d is a diagram showing the energy density distribution of the spot surface when the distance between the fourth collection lens and the other lenses in the collection lens group of the first embodiment of the present invention increases by 1.0 mm;
  • FIG. 6 shows a schematic structural view of a light source improvement device provided by a second embodiment of the present invention.
  • FIG. 7 shows a schematic diagram of increasing the refractive index of the focusing component or decreasing the focal length of the focusing component.
  • a new generation of light source based on the use of laser phosphor technology, further develops the technology of using red laser plus fluorescence.
  • the red solid-state light source emits red laser light.
  • the brightness of the light and the color of the laser are used to make the color space of the light source larger.
  • And further improve the brightness of the light source at the same time can also improve the efficiency of the optomechanism, to achieve adjustable color rendering and adjustable brightness of the light source.
  • the red light in the laser plus fluorescent light source is the common output of the laser and the fluorescent light
  • the green light is the fluorescence generated by the excitation of the phosphor, and its coherence is small, so there is no flare effect, and the blue laser uses the flare effect The effect is not obvious, which greatly reduces the difficulty and cost of the extinction spot of the light source.
  • the light source that introduced the red laser discovered the erythema effect during the use, and the erythema appeared as a bright elongated line on the projection screen.
  • the inventor found that the main cause of erythema is the reflection from the lens in the optical path.
  • the inventors tried to remove the laser coherence by collecting the red laser on the phosphor wheel.
  • the red laser passes through the regional diaphragm and is collected by the collection lens onto the fluorescent pink wheel.
  • the curvature of the smallest lens in the collection lens is too large, it is difficult to achieve 100% transmittance in the coating process, so that the red laser cannot reach the fluorescent pink wheel completely, and a small part of the red laser will be reflected by the lens and directly enter the projection lens .
  • the small part of the red laser light reflected by the lens has a higher energy density, and the light at a small angle enters the uniform light device, which cannot perform uniform light, and has a nonuniform high energy density light spot .
  • the high-energy-density light spot appears as a bright elongated line.
  • the high-energy-density red laser shows particularly well in the projection screen with a uniform energy distribution.
  • the inventors conducted research on the root cause of erythema, and proposed a light source improvement device in an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a light source improvement device 1000 according to a first embodiment of the present invention.
  • the light source improvement device 1000 can be used as a light source of an optical system such as a projector.
  • the light source improvement device 1000 includes a laser light source 100, a beam splitting component 200, a collection lens group 300, a fluorescence excitation component 400, a focusing component 500 and a uniform light component 600.
  • the collection lens group 300 includes at least one lens.
  • the laser light emitted by the laser light source 100 is reflected by the beam splitting component 200 and enters the collection lens group 300, and a part of the laser light enters the fluorescence excitation component 400 through the collection lens group 300 and is excited Fluorescence, the laser light incident on the fluorescence excitation assembly 400 and reflected by the fluorescence excitation assembly 400, and the excited fluorescence sequentially enter the uniform light assembly 600 through the collection lens group 300, the beam splitting assembly 200, and the focusing assembly 500; another part of the laser light is collected At least one lens in the lens group 300 is reflected and sequentially enters the uniform light component 600 through the beam splitting component 200 and the focusing component 500.
  • the distance between the at least one lens that reflects part of the laser light in the collection lens group 300 and the focusing assembly 500 can be adjusted so that the imaging position (or the position of the imaging plane) of the part of the laser light reflected by the at least one lens in the collection lens group 300 faces Move toward or away from the focusing assembly 500.
  • the laser light source 100 is a mixed light source including red laser light and blue laser light
  • the blue laser light that passes through the collection lens group 300 and enters part of the laser light of the fluorescence excitation assembly 400 is used to excite the phosphor to generate red fluorescence
  • the red laser light of the part of the laser light incident on the fluorescence excitation assembly 400 is reflected back to the collection lens group 300 through the fluorescence excitation assembly 400, and passes through the collection lens group 300, the beam splitting assembly 200, and the focusing assembly 500 together with the excited red fluorescence Incident into the uniform light component.
  • the laser light emitted by the laser light source 100 can also be transmitted through the beam splitting assembly 200 and enter the collection lens group 300.
  • the laser light and fluorescence returned to the beam splitting assembly 200 through the collection lens group 300 can be reflected by the beam splitting assembly 200 After passing through the focusing component 600, it is incident on the uniform light component 600.
  • the imaging position of a part of the laser light reflected by at least one lens in the collection lens group 300 moves toward the focusing assembly 500, the part of the laser light reflected by the collection lens group 300 is uniformed by the uniform light assembly 600
  • the area of the spot formed by the post-emission will increase. As the area of the spot is larger, the energy density is lower, and the spot effect it produces will be weakened or even eliminated.
  • the laser light source 100 may be a laser that emits blue laser light and red laser light.
  • the blue laser is used as a basic light source, which can be used to enter the fluorescence excitation assembly 400 and excite fluorescence; the red laser can be used to improve the color rendering of the optical system.
  • the laser light source 100 can also be supplemented with a green laser when needed.
  • the distance between the lens farthest from the focusing assembly 500 and the focusing assembly 500 is adjustable.
  • the lens farthest from the focusing assembly 500 has the largest curvature, which is difficult to achieve in its coating process
  • the transmittance of 100% makes the side surface of the lens close to the focusing component 500 reflect a small part of the red laser light emitted by the laser light source 100. This part of the red laser light enters the uniform light component 600 at a small angle, which cannot be fully The uniform light intensity is too high, which will cause erythema effect.
  • the angle at which part of the red laser light reflected by it enters the homogenizing assembly 600 can be changed, and further Improve erythema effect.
  • the laser light source 100 emits laser light of other colors, for example, blue, green, etc.
  • the laser light emitted by the laser light source is reflected by a small portion of the laser light from the surface of the lens in the collection lens group 300 close to the focusing assembly 500 ( Light that is unfavorable for the display effect of the picture) can also be adjusted by the light source improvement device 1000.
  • the collection lens group 300 includes a first collection lens 310, a second collection lens 320, and a third collection lens that are sequentially arranged in a direction away from the focusing assembly 500 330 and the fourth collection lens 340.
  • the curvature of the surface of the fourth collection lens 340 near the focusing assembly 500 is greater than the curvature of the surface of the first collection lens 310, the second collection lens 320, and the third collection lens 330 near the focusing assembly 500.
  • the distance between the lens 340 and the focusing assembly 500 is adjustable.
  • the curvatures of the surfaces of the first collection lens 310, the second collection lens 320, the third collection lens 330, and the fourth collection lens 340 near the focusing assembly 500 increase sequentially, which can achieve better focusing effects.
  • the red laser light incident on the collection lens group 300 is focused on the fluorescence excitation assembly 400, and the excited fluorescence can be collected sufficiently to increase the overall brightness of the light source and improve the efficiency of the optical machine.
  • the first collection lens 310 is a lenticular lens, which is used to collect and focus the red laser light reflected by the beam splitting assembly 200 to the second collection lens 320.
  • the second collection lens 320 is a positive lens with a convex surface on the side closer to the focusing component 500 and a concave surface on the side farther from the focusing component 500, which is used to further focus the laser beam emitted through the first collection lens 310 to a third with a greater curvature Collect lens 330.
  • the curvature of the side surface of the second collection lens 320 near the focusing assembly 500 is greater than the curvature of the side surface away from the focusing assembly 500.
  • the third collection lens 330 is a positive lens having a convex surface on the side closer to the focusing assembly 500 and a concave surface on the side farther away from the focusing assembly 500, which is used to further focus the laser beam emitted through the second collection lens 320 to a fourth with a greater curvature Collect lens 340.
  • the curvature of the surface of the third collection lens 330 near the focusing assembly 500 is greater than the curvature of the surface away from the focusing assembly 500.
  • the fourth collection lens 340 is a positive lens on the side closer to the focusing component 500 and a concave surface on the side farther from the focusing component 500, and is used to further focus the laser beam emitted through the third collection lens 330 to the fluorescence excitation component 400.
  • the curvature of the side surface of the fourth collection lens 340 near the focusing assembly 500 is greater than the curvature of the side surface away from the focusing assembly 500.
  • the distance between the fourth collection lens 340 and the focusing assembly 500 is adjustable.
  • the distance between the first collection lens 310, the second collection lens 320, and the third collection lens 330 and the focusing assembly 500 may also be adjustable.
  • the collection lens group 300, the beam splitting assembly 200, and the focusing assembly 500 may be arranged coaxially. It can be understood that, in other possible implementation manners, the collection lens group 300, the beam splitting assembly 200, and the focusing assembly 500 may not be arranged coaxially.
  • the beam splitter 200 may be a beam splitter, which can reflect all the red laser light emitted by the laser light source 100 to the collection lens group 300, and can transmit the laser light and fluorescence returned through the collection lens group 300 The light beam, so that the laser beam and the fluorescent beam returned by the collection lens group 300 can enter the focusing assembly 500.
  • the spectroscopic assembly 200 is composed of two regions, a first region located in the center of the spectroscopic assembly 200 and a second region disposed around the first region. The area of the first region is much smaller than the area of the second region.
  • the first area When the laser light emitted by the light source 100 is reflected by the beam splitting assembly 200 and enters the collection lens group 300, the first area reflects the laser light, and the second area transmits laser light and fluorescence; when the laser light emitted by the laser light source 100 passes through the beam splitting assembly 200 and is incident to the collection In the lens group 300, the first area transmits laser light, and the second area reflects laser light and fluorescence.
  • the light splitting component 200 may also be other optical elements with selective transmission.
  • the fluorescent excitation component 400 may be a fluorescent pink wheel, which is coated with one or more fluorescent pink segments/sheets of different colors and different excitation spectra on the color wheel substrate, so as to utilize
  • the laser light generally blue laser light
  • the laser is incident on the scattering section of the color wheel mainly to eliminate speckle.
  • the laser light in the incident scattering section may be one or more of blue laser light, red laser light, and green laser light.
  • the fluorescence excitation component 400 may also be other optical elements that can be used to absorb laser light and generate fluorescence.
  • the focusing assembly 500 may be a focusing lens, which can focus the laser beam and the fluorescent beam emitted from the collection lens group 300 and passing through the beam splitting assembly 200 to the uniform light assembly 600.
  • the focusing component 500 may be a positive lens with a convex surface on the side near the uniform light component 600 and a flat surface on the side away from the uniform light component 600. It can be understood that, in other possible implementation manners, the focusing assembly 500 may also be other optical elements with a light-concentrating function.
  • the uniform light component 600 may be a uniform light square bar.
  • the laser beam and the fluorescent beam emitted through the focusing component 500 enter the uniform light square bar, the light can be reflected and scattered on the inner wall of the square bar to form light
  • the light beam with uniform energy distribution exits from the exit of the uniform light square bar to provide a light source with uniform light energy distribution for the optical machine system.
  • the reflected laser beam when the distance between the fourth collection lens 340 that causes laser reflection in the collection lens group 300 and the other lenses is increased (as shown in FIG. 3), the reflected laser beam is The focus position will move from the exit to the entrance of the square beam, and the angle of entering the square beam will increase. At this time, the partially reflected laser beam can be incident on the inner wall of the square beam to reflect after converging. With scattering, uniform light can be carried out without directly passing through the uniform light square bar due to the small angle of incidence, producing bright red spots without uniform light, that is, reducing the erythema effect generated by this part of the laser. The erythema effect can even be eliminated when the energy density of the erythema generated by this part of the laser is the same as the energy density of the fluorescent beam passing through the uniform light.
  • FIG. 5a is the distribution diagram of the spot surface energy density before the lens pitch adjustment in the collection lens group 300
  • FIG. 5b is the fourth collection lens 340 and other lenses in the collection lens group 300 (Or focusing assembly 500) the spot surface energy density distribution when the spacing increases by 0.2mm
  • FIG. 5c is the spot when the spacing between the fourth collection lens 340 and other lenses (or focusing assembly 500) in the collection lens group 300 increases by 0.5mm
  • FIG. 5d is a spot surface energy density distribution diagram when the distance between the fourth collection lens 340 and other lenses (or focusing assembly 500) in the collection lens group 300 increases by 1.0 mm. As can be seen from FIGS.
  • the light source improvement device 1000 provided in this embodiment adjusts the position of the lens and the focusing assembly 500 in the collection lens group 300 that cause laser reflection, so that the position of the image surface on which the reflected laser beam forms a light spot moves backward, thereby making the output of the uniform light assembly 600
  • the laser energy distribution is relatively uniform, reducing or even eliminating the spot effect.
  • FIG. 6 is a schematic structural diagram of a light source improvement device 1000 according to a second embodiment of the present invention.
  • the biggest difference between the light source improvement device 1000 provided in this embodiment and the first embodiment is that the refractive index of the focusing assembly 500 is adjustable, that is, the focal length of the focusing assembly 500 is adjustable.
  • the refractive index of the focusing assembly 500 when the refractive index of the focusing assembly 500 is increased or the focal length of the focusing assembly 500 becomes smaller (the upper diagram in FIG. 7 becomes the lower diagram), the light beam (red spot imaging) passing through the focusing assembly 500 can be made (Surface)
  • the angle of incidence into the uniform light component 600 becomes larger, and the imaging position moves toward the focusing component 500 (or the entrance of the uniform light component 600), which can increase the area of the light spot output through the uniform light component 600 and reduce the red spot Energy density, weaken or even eliminate the erythema effect.
  • the high energy density of erythema can be significantly weakened, and the output fluorescence can be basically satisfied while reducing the erythema effect Design requirements.
  • the light source improvement device adjusts the position of the lens and focusing component that causes laser reflection in the collection lens group, so that the position of the image surface of the reflected laser beam forming the light spot is moved backward, and thus the output through the uniform light component
  • the laser energy distribution is relatively uniform, reducing or even eliminating the spot effect.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Projection Apparatus (AREA)

Abstract

一种光源改善装置（1000），涉及激光技术领域。光源改善装置（1000）包括激光光源（100）、分光组件（200）、收集透镜组（300）、荧光激发组件（400）、聚焦组件（500）以及匀光组件（600），收集透镜组（300）包括至少一个透镜（310,320,330,340），收集透镜组（300）中反射部分激光的第四收集透镜（340）与聚焦组件（500）的距离可调节，以使经收集透镜组（300）中的第四收集透镜（340）反射的部分激光的成像位置朝靠或远离近聚焦组件（500）的方向移动。从光斑产生的根本原因来进行相关的设计调节，可通过调节收集透镜组（300）中引起激光反射的第四收集透镜（340）与聚焦组件（500）的位置，使反射激光形成光斑的像面位置后移，进而使得经过匀光组件（600）输出的激光能量分布相对均匀化，实现减弱甚至消除光斑效应。

Description

光源改善装置 技术领域
本实用新型涉及激光技术领域，更具体地，涉及一种光源改善装置。
背景技术
目前，随着激光荧光技术的发展应用，新一代光源在使用激光荧光粉技术的基础上，进一步开发使用红激光加荧光的技术。红色的固态光源发射红激光，通过增加红激光技术，动态调整红光在白光中的占比，从而获得高显色性的光源系统，利用荧光的亮度与激光的颜色，使得光源色彩空间更大，并且进一步提高光源的亮度，同时还可提升光机效率，实现光源显色性可调、亮度可调。
实用新型内容
本实用新型提出了一种光源改善装置，可通过调节收集透镜组中引起激光反射的透镜与聚焦组件的位置，改善甚至消除光斑效应。
本实用新型实施例提供了一种光源改善装置，包括激光光源、分光组件、收集透镜组、荧光激发组件、聚焦组件以及匀光组件，收集透镜组包括至少一个透镜，由激光光源出射的激光经分光组件入射至收集透镜组，一部分激光透过收集透镜组入射至荧光激发组件并激发出荧光，入射至荧光激发组件并经荧光激发组件反射的激光，与激发出的荧光依次透过收集透镜组、分光组件以及聚焦组件入射至匀光组件；另一部分激光经收集透镜组中的至少一个透镜反射，依次透过分光组件以及聚焦组件入射至匀光组件，收集透镜组中反射部分激光的至少一个透镜与聚焦组件的距离可调节，以使经收集透镜组中的至少一个透镜反射的部分激光的成像位置朝靠近或远离聚焦组件的方向移动。
进一步的，所述收集透镜组中距离所述聚焦组件最远的透镜与所述聚 焦组件的距离可调节。
进一步的，所述收集透镜组包括沿远离所述聚焦组件的方向依次设置的第一收集透镜、第二收集透镜、第三收集透镜以及第四收集透镜，所述第四收集透镜与所述聚焦组件的距离可调节。
进一步的，所述第四收集透镜靠近所述聚焦组件一侧表面的曲率大于所述第一收集透镜、所述第二收集透镜以及所述第三收集透镜靠近所述聚焦组件一侧表面的曲率。
进一步的，所述聚焦组件的折射率可调节。
进一步的，所述收集透镜组、所述分光组件以及所述聚焦组件共轴设置。
进一步的，所述分光组件为分光镜。
进一步的，所述荧光激发组件为荧光粉色轮。
进一步的，所述聚焦组件为聚焦透镜。
进一步的，所述匀光组件为匀光方棒。
本实用新型实施例提供的光源改善装置，通过调节收集透镜组中引起激光反射的透镜与聚焦组件的位置，使反射激光形成光斑的像面位置后移，进而使得经过匀光组件输出的激光能量分布相对均匀化，实现减弱甚至消除光斑效应。
本实用新型的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
附图说明
为了更清楚地说明本实用新型实施例中的技术方案，下面将对实施例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实用新型的一些实施例，对于本领域技术人员来讲，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示出了本实用新型第一实施例提供的光源改善装置的结构示意 图；
图2示出了本实用新型第一实施例提供的收集透镜组的结构示意图；
图3示出了调节收集透镜组中的第四收集透镜与其他透镜之间的间距增大时的示意图；
图4为出了本实用新型第一实施例提供的光源改善装置的光路示意图；
图5a为出了本实用新型第一实施例的收集透镜组中透镜间距调整前的光斑表面能量密度分布图；
图5b为出了本实用新型第一实施例的收集透镜组中第四收集透镜与其他透镜间距增大0.2mm时的光斑表面能量密度分布图；
图5c为出了本实用新型第一实施例的收集透镜组中第四收集透镜与其他透镜间距增大0.5mm时的光斑表面能量密度分布图；
图5d为出了本实用新型第一实施例的收集透镜组中第四收集透镜与其他透镜间距增大1.0mm时的光斑表面能量密度分布图；
图6示出了本实用新型第二实施例提供的光源改善装置的结构示意图；
图7示出了调节聚焦组件的折射率增大或调节聚焦组件的焦距变小时的示意图。
具体实施方式
下面详细描述本实用新型的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本实用新型，而不能理解为对本实用新型的限制。
目前，随着激光荧光技术的发展应用，新一代光源在使用激光荧光粉技术的基础上，进一步开发使用红激光加荧光的技术。红色的固态光源发射红激光，通过增加红激光技术，动态调整红光在白光中的占比，从而获 得高显色性的光源系统，利用荧光的亮度与激光的颜色，使得光源色彩空间更大，并且进一步提高光源的亮度，同时还可提升光机效率，实现光源显色性可调、亮度可调。
此外，相比于纯激光技术，激光加荧光光源中红光是激光与荧光共同输出，绿光是由荧光粉激发产生的荧光，其相干性小，因此不存在光斑效应，而蓝激光应用光斑效应不明显，从而大大降低了光源消光斑的难度与成本。
然而，发明人在使用这一新技术的过程中发现存在一些问题，引入红激光的光源在使用过程中发现了红斑效应，红斑表现为投影屏幕上高亮的细长线。发明人经过进一步研究发现，红斑产生的主要原因是来自于光路中透镜的反射。
为了消除引入红激光后的光斑影响，发明人尝试通过将红激光收集到荧光粉轮上，从而消除激光相干性。红激光在经过区域膜片，后由收集透镜收集到荧光粉色轮上。然而，收集透镜中最小一片透镜曲率过大，镀膜加工中难以达到100％的透过率，使得红激光不能完全到达荧光粉色轮，有很小的一部分红激光会由透镜反射，直接进入投影镜头。相比于经过荧光轮后匀光过的红激光，由透镜反射的小部分红激光能量密度较高，很小角度的光进入匀光器件中，不能进行匀光，不均匀高能能量密度的光斑，就继续以不均匀的高能量的方式进入后续的光机系统，最后进入投影画面中。高能量密度光斑表现为高亮的细长线，在投影画面中，高能量密度的红激光在均匀能量分布的投影画面中表现的结果尤其明显。
为了解决上述的问题，发明人对红斑产生的根本原因进行了研究，提出了本实用新型实施例中的光源改善装置。
为了使本技术领域的人员更好地理解本实用新型方案，下面将结合本实用新型实施例中的附图，对本实用新型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实用新型一部分实施例，而 不是全部的实施例。基于本实用新型中的实施例，本领域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，都属于本实用新型保护的范围。
第一实施例
请参照图1，图1是本实用新型第一实施例提供的光源改善装置1000的结构示意图。本实施例中，光源改善装置1000可用作投影机等光学系统的光源。
本实施例中，如图1所示，光源改善装置1000包括激光光源100、分光组件200、收集透镜组300、荧光激发组件400、聚焦组件500以及匀光组件600。其中，收集透镜组300包括至少一个透镜。
作为一种方式，当光源改善装置1000工作时，由激光光源100出射的激光经分光组件200反射并入射至收集透镜组300，一部分激光透过收集透镜组300入射至荧光激发组件400并激发出荧光，入射至荧光激发组件400并经荧光激发组件400反射的激光，与激发出的荧光依次透过收集透镜组300、分光组件200以及聚焦组件500入射至匀光组件600；另一部分激光经收集透镜组300中的至少一个透镜反射，依次透过分光组件200以及聚焦组件500入射至匀光组件600。其中，收集透镜组300中反射部分激光的至少一个透镜与聚焦组件500的距离可调节，以使经收集透镜组300中的至少一个透镜反射的部分激光的成像位置(或成像面的位置)朝靠近或远离聚焦组件500的方向移动。在一些实施方式中，当激光光源100为包含红激光、蓝激光的混合光源时，经过收集透镜组300并入射到荧光激发组件400的部分激光中的蓝激光用于激发荧光粉产生红荧光，而入射至荧光激发组件400上的部分激光中的红激光则经由荧光激发组件400反射回到收集透镜组300，并与激发出的红荧光一同经由收集透镜组300、分光组件200以及聚焦组件500入射至匀光组件中。
作为另一种方式，由激光光源100出射的激光还可经过分光组件200 透射并入射至收集透镜组300，此时，经收集透镜组300返回分光组件200的激光与荧光可经分光组件200反射并经过聚焦组件600入射至匀光组件600。
可以理解的是，当经收集透镜组300中的至少一个透镜反射的部分激光的成像位置朝靠近聚焦组件500的方向移动时，由收集透镜组300反射的该部分激光经匀光组件600匀光后出射形成的光斑面积会增大，由于光斑面积越大，能量密度越低，其产生的光斑效应会减弱甚至消除。
本实施例中，激光光源100，可以是发射蓝激光以及红激光的激光器。其中，蓝激光作为基础的光源，其可用于入射至荧光激发组件400并激发出荧光；红激光可用于提高光学系统的显色性。在一些实施方式中，激光光源100在需要时还可以补充绿色激光器。
在一些实施方式中，当收集透镜组300中包含至少多个透镜时，其中与聚焦组件500距离最远的透镜与聚焦组件500的距离可调节。
为了将入射至收集透镜组300中的红激光聚焦至荧光激发组件400，当收集透镜组300中包括多个透镜时，距离聚焦组件500最远的透镜的曲率最大，由于其镀膜加工中难以达到100％的透过率，使得该透镜靠近聚焦组件500的一侧表面会反射一小部分由激光光源100发出的红激光，该部分红激光以很小的角度进入匀光组件600，不能进行充分的匀光，其能量密度过高，会导致红斑效应。通过使该与聚焦组件500距离最远的透镜与聚焦组件500(或收集透镜组300中的其他透镜)的距离可调节，可改变由其反射的部分红激光进入匀光组件600的角度，进而改善红斑效应。当激光光源100发出的是其它颜色的激光时，比如，蓝色、绿色等，激光光源发出的激光其由收集透镜组300中的透镜靠近聚焦组件500的一侧表面反射的一小部分激光(对画面显示效果不利的光)同样可以通过光源改善装置1000进行调节。
本实施例中，作为一种方式，如图1、图2所示，收集透镜组300包 括沿远离聚焦组件500的方向依次设置的第一收集透镜310、第二收集透镜320、第三收集透镜330以及第四收集透镜340。
本实施例中，第四收集透镜340靠近聚焦组件500一侧表面的曲率大于第一收集透镜310、第二收集透镜320以及第三收集透镜330靠近聚焦组件500一侧表面的曲率，第四收集透镜340与聚焦组件500的距离可调节。作为一种方式，第一收集透镜310、第二收集透镜320、第三收集透镜330以及第四收集透镜340靠近聚焦组件500一侧表面的曲率依次增大，其能够实现较好的聚焦效果，将入射至收集透镜组300的红激光聚焦至荧光激发组件400上，且可将激发出的荧光充分收集，以增加光源的整体亮度，提升光机效率。
本实施例中，如图2所示，第一收集透镜310为双凸透镜，其用于将由分光组件200反射的红色激光收集并聚焦至第二收集透镜320。
第二收集透镜320为靠近聚焦组件500一侧为凸面、远离聚焦组件500一侧为凹面的正透镜，其用于将经由第一收集透镜310出射的激光光束进一步聚焦至曲率更大的第三收集透镜330。作为一种方式，第二收集透镜320靠近聚焦组件500一侧表面的曲率大于远离聚焦组件500一侧表面的曲率。
第三收集透镜330为靠近聚焦组件500一侧为凸面、远离聚焦组件500一侧为凹面的正透镜，其用于将经由第二收集透镜320出射的激光光束进一步聚焦至曲率更大的第四收集透镜340。作为一种方式，第三收集透镜330靠近聚焦组件500一侧表面的曲率大于远离聚焦组件500一侧表面的曲率。
第四收集透镜340为靠近聚焦组件500一侧为凸面、远离聚焦组件500一侧为凹面的正透镜，其用于将经由第三收集透镜330出射的激光光束进一步聚焦至荧光激发组件400。作为一种方式，第四收集透镜340靠近聚焦组件500一侧表面的曲率大于远离聚焦组件500一侧表面的曲率。
本实施例中，第四收集透镜340与聚焦组件500的间距可调节。在其他可能的实施方式中，第一收集透镜310、第二收集透镜320以及第三收集透镜330与聚焦组件500的间距也可以是可调节的。
请参照图3，当调节收集透镜组300中引起激光反射的第四收集透镜340与其他透镜之间的间距增大时(图3中的左图变为右图)，可以减少其靠近聚焦组件500一侧表面反射的激光光束进入聚焦组件500的入射角度。
请参照图4所示的光路图，当反射的激光光束进入聚焦组件500的入射角度变小时，根据折射定律，其从聚焦组件500出射的角度会变大，即经过聚焦组件500聚焦成像的焦点位置会朝聚焦组件500的方向移动，从而使得其进入匀光组件600的角度变大，进而使得经匀光组件600出射形成的红色光斑的面积扩大，红光斑的能量密度降低，红斑效应减弱。
本实施例中，作为一种方式，收集透镜组300、分光组件200以及聚焦组件500可以共轴设置。可以理解的是，在其他可能的实施方式中，收集透镜组300、分光组件200以及聚焦组件500也可以不共轴设置。
本实施例中，作为一种方式，分光组件200可以是分光镜，其能够将激光光源100发出的红色激光全部反射至收集透镜组300，并可透过经由收集透镜组300返回的激光与荧光光束，以使由收集透镜组300返回的激光与荧光光束能够入射至聚焦组件500。具体地，例如，分光组件200由两个区域组成，位于分光组件200中心的第一区域和环绕第一区域设置的第二区域，第一区域的面积远小于第二区域的面积，当由激光光源100出射的激光经分光组件200反射并入射至收集透镜组300时，第一区域反射激光，第二区域透射激光和荧光；当由激光光源100出射的激光经过分光组件200透射并入射至收集透镜组300时，第一区域透射激光，第二区域反射激光和荧光。可以理解的是，在其他可能的实施方式中，分光组件200还可以是其他具有选择透过性的光学元件。
本实施例中，作为一种方式，荧光激发组件400可以是荧光粉色轮，其通过在色轮基板上涂布一种或多种不同颜色、不同激发光谱的荧光粉色段/片层，从而利用激光光源100发出的激光(一般为蓝色激光)激发出荧光，并将激发产生的荧光与经过色轮散射区段反射的激光一同作为光机的光源。激光入射色轮的散射区段主要是为了消除散斑。入射散射区段的激光可以是蓝激光、红激光、绿激光中一种或多种。可以理解的是，在其他可能的实施方式中，荧光激发组件400还可以是其他能够用于吸收激光并产生荧光的光学元件。
本实施例中，作为一种方式，聚焦组件500可以是聚焦透镜，其能够将由收集透镜组300出射并穿过分光组件200的激光与荧光光束聚焦至匀光组件600。作为一种方式，聚焦组件500可以是靠近匀光组件600一侧为凸面、远离匀光组件600一侧为平面的正透镜。可以理解的是，在其他可能的实施方式中，聚焦组件500还可以是其他具有聚光功能的光学元件。
本实施例中，作为一种方式，匀光组件600可以是匀光方棒，当经由聚焦组件500出射的激光与荧光光束进入匀光方棒后，能够在方棒内壁经过反射与散射形成光能量分布均匀的光束并从匀光方棒的出口出射，以为光机系统提供光能量分布均匀的光源。
本实施例中，当调节收集透镜组300中引起激光反射的第四收集透镜340与其他透镜之间的间距增大时(如图3所示)，反射的激光光束在匀光方棒中的焦点位置会从匀光方棒的出口处向入口处移动，且进入匀光方棒的角度会增大，此时该部分反射的激光光束能够在会聚后入射至匀光方棒的内壁进行反射与散射，即可进行匀光，而不会因为入射角度较小而直接穿过匀光方棒，产生没有经过匀光的高亮红斑，即减弱了该部分激光产生的红斑效应。当该部分激光产生的红斑的能量密度与经过匀光的荧光光束的能量密度一致时，红斑效应甚至能够被消除。
请参照图5a、图5b、图5c以及图5d，图5a为收集透镜组300中透镜 间距调整前的光斑表面能量密度分布图，图5b为收集透镜组300中第四收集透镜340与其他透镜(或聚焦组件500)间距增大0.2mm时的光斑表面能量密度分布图，图5c为收集透镜组300中第四收集透镜340与其他透镜(或聚焦组件500)间距增大0.5mm时的光斑表面能量密度分布图，图5d为收集透镜组300中第四收集透镜340与其他透镜(或聚焦组件500)间距增大1.0mm时的光斑表面能量密度分布图。由图5a、图5b、图5c以及图5d可以看出，在收集透镜组300中的第四收集透镜340与其他透镜的间距增大后，光斑表面能量密度分布变得更为均匀，红斑能量密度得到了有效降低，红斑效应减弱。
本实施例提供的光源改善装置1000，通过调节收集透镜组300中引起激光反射的透镜与聚焦组件500的位置，使反射激光形成光斑的像面位置后移，进而使得经过匀光组件600输出的激光能量分布相对均匀化，实现减弱甚至消除光斑效应。
第二实施例
请参照图6，图6是本实用新型第二实施例提供的光源改善装置1000的结构示意图。本实施例提供的光源改善装置1000与第一实施例最大的不同在于，聚焦组件500的折射率可调，即聚焦组件500的焦距可调。
请参照图7，当调节聚焦组件500的折射率增大或调节聚焦组件500的焦距变小时(图7中的上图变为下图)，可以使经过聚焦组件500的光束(红光斑的成像面)进入匀光组件600的入射角度变大，且成像位置朝聚焦组件500(或匀光组件600入口)的方向移动，可以增大经由匀光组件600输出的光斑的面积，降低红光斑的能量密度，减弱甚至消除红斑效应。
本实施例提供的光源改善装置1000，通过调节聚焦组件500的折射率，合理优化聚焦组件500的焦距，可使红斑的高能量密度明显弱化，在减弱红斑效应的同时可使输出的荧光基本满足设计要求。
综上，本实用新型实施例提供的光源改善装置，通过调节收集透镜组中引起激光反射的透镜与聚焦组件的位置，使反射激光形成光斑的像面位置后移，进而使得经过匀光组件输出的激光能量分布相对均匀化，实现减弱甚至消除光斑效应。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“实施方式”等的描述意指结合该实施例、示例或实施方式描述的具体特征、结构、材料或者特点包含于本实用新型的至少一个实施例、示例或实施方式中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
最后应说明的是：以上实施例仅用以说明本实用新型的技术方案，而非对其限制；尽管参照前述实施例对本实用新型进行了详细的说明，本领域的普通技术人员当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不驱使相应技术方案的本质脱离本实用新型各实施例技术方案的精神和范围。

Claims (10)

  1. 一种光源改善装置，其特征在于，包括激光光源、分光组件、收集透镜组、荧光激发组件、聚焦组件以及匀光组件，所述收集透镜组包括至少一个透镜；
    由所述激光光源出射的激光经所述分光组件入射至所述收集透镜组，一部分激光透过所述收集透镜组入射至所述荧光激发组件并激发出荧光，入射至所述荧光激发组件并经所述荧光激发组件反射的激光，与激发出的荧光依次透过所述收集透镜组、所述分光组件以及所述聚焦组件入射至所述匀光组件；另一部分激光经所述收集透镜组中的至少一个透镜反射，依次透过所述分光组件以及所述聚焦组件入射至所述匀光组件；
    所述收集透镜组中反射部分激光的至少一个透镜与所述聚焦组件的距离可调节，以使经所述收集透镜组中的至少一个透镜反射的部分激光的成像位置朝靠近或远离所述聚焦组件的方向移动。
  2. 根据权利要求1所述的光源改善装置，其特征在于，所述收集透镜组中距离所述聚焦组件最远的透镜与所述聚焦组件的距离可调节。
  3. 根据权利要求1所述的光源改善装置，其特征在于，所述收集透镜组包括沿远离所述聚焦组件的方向依次设置的第一收集透镜、第二收集透镜、第三收集透镜以及第四收集透镜，所述第四收集透镜与所述聚焦组件的距离可调节。
  4. 根据权利要求3所述的光源改善装置，其特征在于，所述第四收集透镜靠近所述聚焦组件一侧表面的曲率大于所述第一收集透镜、所述第二收集透镜以及所述第三收集透镜靠近所述聚焦组件一侧表面的曲率。
  5. 根据权利要求1所述的光源改善装置，其特征在于，所述聚焦组件的折射率可调节。
  6. 根据权利要求1所述的光源改善装置，其特征在于，所述收集透镜组、所述分光组件以及所述聚焦组件共轴设置。
  7. 根据权利要求1所述的光源改善装置，其特征在于，所述分光组件为分光镜。
  8. 根据权利要求1所述的光源改善装置，其特征在于，所述荧光激发组件为荧光粉色轮。
  9. 根据权利要求1所述的光源改善装置，其特征在于，所述聚焦组件为聚焦透镜。
  10. 根据权利要求1所述的光源改善装置，其特征在于，所述匀光组件为匀光方棒。
PCT/CN2019/119152 2018-12-17 2019-11-18 光源改善装置 Ceased WO2020125302A1 (zh)

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Publication number Priority date Publication date Assignee Title
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101799619A (zh) * 2005-02-25 2010-08-11 松下电器产业株式会社 二维图像形成装置
CN107797372A (zh) * 2017-11-17 2018-03-13 四川长虹电器股份有限公司 一种双色激光光源光学引擎系统
CN108037632A (zh) * 2017-12-27 2018-05-15 青岛海信电器股份有限公司 一种用于投影的激光照明装置、投影系统及其调节方法
US20180239233A1 (en) * 2017-02-23 2018-08-23 Takahiro KADO Illumination device and image projection apparatus
CN108663879A (zh) * 2017-03-31 2018-10-16 中强光电股份有限公司 投影机及其照明系统
CN108931878A (zh) * 2017-05-26 2018-12-04 深圳市光峰光电技术有限公司 光源系统及显示设备
CN209281140U (zh) * 2018-12-17 2019-08-20 深圳光峰科技股份有限公司 光源改善装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101799619A (zh) * 2005-02-25 2010-08-11 松下电器产业株式会社 二维图像形成装置
US20180239233A1 (en) * 2017-02-23 2018-08-23 Takahiro KADO Illumination device and image projection apparatus
CN108663879A (zh) * 2017-03-31 2018-10-16 中强光电股份有限公司 投影机及其照明系统
CN108931878A (zh) * 2017-05-26 2018-12-04 深圳市光峰光电技术有限公司 光源系统及显示设备
CN107797372A (zh) * 2017-11-17 2018-03-13 四川长虹电器股份有限公司 一种双色激光光源光学引擎系统
CN108037632A (zh) * 2017-12-27 2018-05-15 青岛海信电器股份有限公司 一种用于投影的激光照明装置、投影系统及其调节方法
CN209281140U (zh) * 2018-12-17 2019-08-20 深圳光峰科技股份有限公司 光源改善装置

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