WO2016019656A1 - 聚光匀光成像光学系统 - Google Patents

聚光匀光成像光学系统 Download PDF

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Publication number
WO2016019656A1
WO2016019656A1 PCT/CN2014/092197 CN2014092197W WO2016019656A1 WO 2016019656 A1 WO2016019656 A1 WO 2016019656A1 CN 2014092197 W CN2014092197 W CN 2014092197W WO 2016019656 A1 WO2016019656 A1 WO 2016019656A1
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Prior art keywords
light
lens
optical system
concentrating
imaging optical
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PCT/CN2014/092197
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English (en)
French (fr)
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陈志曼
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广州市雅江光电设备有限公司
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Publication of WO2016019656A1 publication Critical patent/WO2016019656A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape

Definitions

  • the utility model relates to the field of LED illumination, in particular to an optical system of an imaging type lamp having a concentrating and shimming function.
  • the objective of the existing imaging luminaire optical system is to obtain a spot with uniform illumination of color at a distance of several meters.
  • the imaging type luminaire generally includes a concentrating part and an imaging part, and determining whether the last spot of the luminaire is uniform depends largely on the optical system of the concentrating part.
  • the existing concentrating part optical system often does It is more complicated and generally consists of a plurality of optical lenses.
  • the combined optical system can achieve the purpose, the design is complicated, the dimming is complicated, the manufacturing cost is high, and the luminaire is bulky.
  • the technical problem to be solved by the utility model is to provide a concentrating and homogenizing imaging optical system, which has a simple structure and obtains uniform color and illuminance on a plane perpendicular to the direction in which the light is emitted in a short distance while collecting the light diverging from the LED light source. Light spot.
  • the technical solution of the present invention is: a concentrating and homogenizing imaging optical system, comprising an LED light source, a concentrating and illuminating portion, and an imaging portion, wherein the concentrating and illuminating portion includes the first according to the optical path direction.
  • the first lens includes a bottom surface, a surface, and a side surface between the bottom surface and the surface; the bottom surface is provided with a cavity recessed into the first lens and used for accommodating the LED lamp bead
  • the top of the cavity An arcuate protrusion is disposed, the surface of the cavity forming a light incident surface; the side surface is formed by one or more curved surfaces that totally reflect light in a direction of ⁇ 4 to 5 degrees, and the curved surface forms a light reflecting surface;
  • the surface is provided with a set of microbeads, the microbead set consisting of a number of small curved surfaces forming a light exit surface.
  • the concentrating and concentrating portion of the utility model has the functions of concentrating and averaging, and the incident surface formed by the first lens cavity and the reflecting surface of the rotating curved surface allow the light to be mixed at a short distance without changing the divergence angle or the divergence angle.
  • the first lens exit surface is provided with a micro bead set to make the generated spot more uniform.
  • the light first condenses, mixes and homogenizes the light through the condensing and concentrating portion, so that the finally imaged spot is more uniform in illuminance and color at a shorter distance.
  • the more the number of curved surfaces of the reflecting surface is, the better the effect is, the light mixing distance is close, and the light mixing is uniform.
  • the front end of the reflecting surface facing the light reflecting direction is used to reflect the light in the direction of 5 degrees
  • the rear end of the reflecting surface toward the light reflecting direction is used to reflect the light in the -4 degree direction.
  • the first lens is a rotating body.
  • the second lens incident surface is a convex curved surface having a radius of curvature of R45-70 mm
  • the exit surface is a plane
  • the second lens has a diameter of 40-60 mm.
  • the second lens is 70-80 mm from the LED light source.
  • the image forming portion sequentially includes a panel having a light passing hole, a third lens, and a fourth lens in accordance with the optical path direction.
  • the incident surface of the third lens is a plane
  • the exit surface is a convex curved surface
  • the radius of curvature is R38-52 mm
  • the incident surface of the fourth lens is a plane
  • the exit surface is a convex curved surface, and the radius of curvature thereof For R48-80mm.
  • the through hole has a diameter of 25-40 mm
  • the third lens has a diameter of 38-60 mm
  • the fourth lens has a diameter of 50-65 mm
  • the light passing hole is away from the second lens 10- 40mm
  • the third lens is 20-40mm away from the light passing hole
  • the fourth The lens is 60-80 mm from the third lens.
  • the LED light source comprises an LED substrate and an LED bead, the LED bead being packaged by a single chip or a multi-chip.
  • the light first condenses, mixes and homogenizes the light through the condensing and concentrating portion, so that the finally imaged spot is more uniform in illuminance and color at a shorter distance.
  • Figure 1 is a schematic view of the structure of the present invention.
  • Figure 3 is a plan view of the first lens.
  • Figure 5 is a light reflection diagram of the first lens of Example 2.
  • Figure 6 is a light reflection diagram of the first lens of Embodiment 3.
  • Fig. 7 is a light path diagram of the condensed light concentrating portion.
  • a concentrating and homogenizing imaging optical system includes an LED light source 1, a condensing and concentrating portion, and an imaging portion.
  • the LED light source 1 includes an LED substrate and an LED lamp bead 14 disposed on the LED substrate, and the LED lamp bead 14 is packaged by a single chip or a multi-chip.
  • the concentrating and concentrating portions sequentially include a first lens 2 and a second lens 3 according to an optical path direction, and the first lens 2 is a small-angle condensing and condensing lens.
  • the first lens 2 is a rotating body including a bottom surface, a surface, and a side surface between the bottom surface and the surface.
  • the bottom surface is provided with a cavity 25 recessed into the first lens for accommodating the LED lamp bead 14.
  • the top of the cavity 25 is provided with an arc-shaped protrusion 26, and the surface of the cavity 25 forms a light incident surface. twenty one.
  • the side surface is formed by one or more curved surfaces that totally reflect light in a direction of -4 to 5 degrees, and the curved surface forms a light reflecting surface 22.
  • the surface is provided with a micro bead set 27 which is composed of a plurality of small curved faces 27 which form a light exit face 23.
  • the side surface as the reflecting surface 22 is composed of a curved surface 21a.
  • the curved surface 21a totally reflects the light ray a and the outgoing direction is 5 degrees, and the curved surface 21a totally reflects the light 2 in the direction of -4 degrees.
  • the other rays are uniformly reflected by the curved surface and then uniformly distributed between 5 degrees and -4 degrees.
  • the emitted light obtained in this embodiment has a non-uniform spot within a distance of 100 mm behind the first lens, and a black center is in the middle of the spot; the color of the spot and the illuminance are uniform after the first lens 2 is 100 mm, and the light exit angle is uniform. Between ⁇ 6 degrees.
  • the incident surface of the second lens 3 is a convex curved surface having a radius of curvature of R45 mm, the exit surface is a plane, and the second lens 3 has a diameter of 40 mm.
  • the second lens 3 is 170 mm away from the LED light source.
  • the image forming portion sequentially includes a panel 4 having a light passing hole, a third lens 5, and a fourth lens 6 in accordance with the optical path direction.
  • the incident surface of the third lens 5 is a plane
  • the exit surface is a convex curved surface
  • the radius of curvature is R38 mm.
  • the incident surface of the fourth lens 6 is a plane
  • the exit surface is a convex curved surface having a radius of curvature of R48 mm.
  • the through hole has a diameter of 25 mm, the third lens 5 has a diameter of 38 mm, and the fourth lens 6 has a diameter of 50 mm; the through hole is 310 mm from the second lens, and the third lens 5 has a distance
  • the light passing hole is 20 mm, and the fourth lens 6 is 560 mm away from the third lens.
  • the incident surface 21 formed by the first lens cavity 25 of the present invention and the reflective surface 22 designed by the rotating curved surface allow the light to be mixed at a short distance, and the first lens exit surface is changed without changing the divergence angle or the divergence angle is small.
  • a concentrating and homogenizing imaging optical system includes an LED light source 1, a condensing and concentrating portion, and an imaging portion.
  • the LED light source 1 includes an LED substrate and an LED lamp bead 14 disposed on the LED substrate, and the LED lamp bead 14 is packaged by a single chip or a multi-chip.
  • the condensed light concentrating portion includes a first lens 2 and a second lens 3 in this order in the optical path direction.
  • the first lens 2 is a small angle concentrating lens
  • the first lens 2 is a rotating body including a bottom surface, a surface, and a side surface between the bottom surface and the surface.
  • the bottom surface is provided with a cavity 25 recessed into the first lens for accommodating the LED lamp bead 14.
  • the top of the cavity 25 is provided with an arc-shaped protrusion 26, and the surface of the cavity 25 forms a light incident surface. twenty one.
  • the side surface is formed by one or more curved surfaces that totally reflect light in a direction of -4 to 5 degrees, and the curved surface forms a light reflecting surface 22. As shown in FIG.
  • the surface is provided with a micro bead set 27 which is composed of a plurality of small curved faces 27 which form a light exit face 23.
  • the side surface of the reflecting surface 22 is composed of two curved surfaces, and the light ray a is totally reflected by the first curved surface 21b and has an exit angle of 5 degrees.
  • the light ray b is totally reflected by the first curved surface 21b and is emitted.
  • the angle is -4 degrees, and other rays are uniformly reflected by the curved surface and then uniformly distributed between 5 degrees and -4 degrees.
  • the light rays adjacent to the light beam b are totally reflected by the second curved surface 22b, and the light exit angle is 5 degrees.
  • the light rays c are totally reflected by the second curved surface 22b, and the light rays are emitted at an angle of -4 degrees, and the light rays between the light rays b and the light rays c pass through the first
  • the direction of the light after total reflection of the two curved surfaces 22b is evenly distributed between 5 degrees and -4 degrees. As shown in FIG. 7, all the emitted light is more uniform in color and illuminance 80 mm behind the first lens 2, the spot is not uniform within 80 mm, the black spot is in the middle of the spot, and the light exit angle of the entire first lens 2 is ⁇ 5 degrees. between.
  • the incident surface of the second lens 3 is a convex curved surface, and The radius of curvature is R60 mm, the exit surface is a plane, and the diameter of the second lens 3 is 50 mm.
  • the second lens 3 is 175 mm from the LED light source.
  • the image forming portion sequentially includes a panel 4 having a light passing hole, a third lens 5, and a fourth lens 6 in accordance with the optical path direction.
  • the incident surface of the third lens 5 is a plane
  • the exit surface is a convex curved surface
  • the radius of curvature is R45 mm.
  • the incident surface of the fourth lens 6 is a plane, and the exit surface is a convex curved surface having a radius of curvature of R60 mm.
  • the through hole has a diameter of 32 mm, the third lens 5 has a diameter of 45 mm, and the fourth lens 6 has a diameter of 60 mm; the through hole is 325 mm from the second lens, and the third lens 5 has a distance
  • the light passing hole is 30 mm, and the fourth lens 6 is 570 mm away from the third lens.
  • the incident surface 21 formed by the first lens cavity 25 of the present invention and the reflective surface 22 designed by the rotating curved surface allow the light to be mixed at a short distance, and the first lens exit surface is changed without changing the divergence angle or the divergence angle is small.
  • 23 Set the micro bead set 27 to make the spotted spot more uniform.
  • a concentrating and homogenizing imaging optical system includes an LED light source 1, a condensing and concentrating portion, and an imaging portion.
  • the LED light source 1 includes an LED substrate and an LED lamp bead 14 disposed on the LED substrate, and the LED lamp bead 14 is packaged by a single chip or a multi-chip.
  • the condensed light concentrating portion includes a first lens 2 and a second lens 3 in this order in the optical path direction.
  • the first lens 2 is a small angle concentrating lens
  • the first lens 2 is a rotating body including a bottom surface, a surface, and a side surface between the bottom surface and the surface.
  • the bottom surface is provided with a cavity 25 recessed into the first lens for accommodating the LED lamp bead 14.
  • the top of the cavity 25 is provided with an arc-shaped protrusion 26, and the surface of the cavity 25 forms a light incident surface. twenty one.
  • the side surface is formed by one or more curved surfaces that totally reflect light in a direction of -4 to 5 degrees, and the curved surface forms a light reflecting surface 22.
  • the surface is provided with a set of microbeads 27, which are composed of a number of small curved faces 27 which form a light exit face 23.
  • the side surface of the reflecting surface 22 is composed of three curved surfaces, and the light ray a is totally reflected by the first curved surface 21c, and the exit angle is 5 degrees, and the light ray b is totally reflected by the first curved surface 21c and then emitted.
  • the angle is -4 degrees, and other rays are uniformly reflected by the curved surface and then uniformly distributed between 5 degrees and -4 degrees.
  • the light rays adjacent to the light b are totally reflected by the second curved surface 22c, and the light exit angle is 5 degrees.
  • the light c is totally reflected by the second curved surface 22c, and the light is emitted at an angle of -4 degrees, and the light between the light b and the light c passes through the first
  • the direction of the light after total reflection of the two curved surfaces 22c is evenly distributed between 5 degrees and -4 degrees.
  • the light rays adjacent to the light c are totally reflected by the third curved surface 23c, and the light exit angle is 5 degrees.
  • the light rays d are totally reflected by the third curved surface 23c, and the light rays are emitted at an angle of -4 degrees, and the light rays between the light rays c and the light rays d pass through the first
  • the direction of the light after total reflection of the three curved surfaces 23c is evenly distributed between 5 degrees and -4 degrees.
  • all the emitted light is more uniform in color and illuminance 60 mm behind the first lens 2, the spot is not uniform within 60 mm, the black spot is in the middle of the spot, and the light exit angle of the entire first lens 2 is ⁇ 5 degrees. In the short distance, the angle is about 60mm in a short distance, and the spot is relatively uniform.
  • the incident surface of the second lens 3 is a convex curved surface having a radius of curvature of R70 mm, the exit surface is a plane, and the second lens 3 has a diameter of 60 mm.
  • the second lens 3 is 180 mm away from the LED light source.
  • the image forming portion sequentially includes a panel 4 having a light passing hole, a third lens 5, and a fourth lens 6 in accordance with the optical path direction.
  • the incident surface of the third lens 5 is a plane
  • the exit surface is a convex curved surface
  • the radius of curvature is R52 mm.
  • the incident surface of the fourth lens 6 is a plane
  • the exit surface is a convex curved surface having a radius of curvature of R80 mm.
  • the through hole has a diameter of 40 mm
  • the third lens 5 has a diameter of 60 mm
  • the fourth lens 6 has a diameter of 65 mm
  • the through hole is 340 mm from the second lens
  • the third lens 5 has a distance
  • the light passing hole is 40 mm
  • the fourth lens 6 is 580 mm away from the third lens.
  • the incident surface 21 and the rotating curved surface formed by the first lens cavity 25 of the present invention allows the light to be mixed at a shorter distance.
  • the first lens exit surface 23 is provided with the micro bead set 27 to make the struck spot more uniform.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

一种聚光匀光成像光学系统，包括LED光源（1）、聚光匀光部分和成像部分，聚光匀光部分沿着光路方向依次包括第一透镜（2）和第二透镜（3）；第一透镜包括底面、表面和位于底面与表面之间的侧面，底面设有向第一透镜内凹陷且用于容置LED灯珠（14）的腔体（25），腔体的顶部设有弧形凸起（26），腔体表面形成光线入射面（21）；侧面由一段或多段对光线沿-4度到5度岀射方向全反射出去的曲面（21a）构成，曲面形成光线反射面（22）；表面设有微型珠面组（27），微型珠面组由若干小曲面（271）组成，微型珠面组形成光线出射面（23）。在光学系统中，光线首先通过聚光匀光部分对光线进行聚光、混合和均匀化，使最后成像出来的光斑在较短距离照度和颜色更均匀。

Description

聚光匀光成像光学系统 技术领域
本实用新型涉及LED照明领域，尤其是具有聚光和匀光功能的成像类灯具的光学系统。
背景技术
采用LED作为光源的LED灯具在颜色、照度均匀方面尚不能达到较高的应用要求，特别是成像类LED灯具。现有成像灯具光学系统设计目标是要在数米距离处得到颜色照度均匀的光斑。成像类的灯具一般包括聚光部分和成像部分，决定灯具最后打出的光斑是否均匀很大程度上取决于聚光部分的光学系统，为了实现该设计目标，现有的聚光部分光学系统往往做得比较复杂，一般由多个光学透镜配合组成，虽然该种组合型的光学系统也能达到目的，但是其设计复杂，调光复杂，制造成本高，而且灯具体积较大。
发明内容
本实用新型所要解决的技术问题是提供一种聚光匀光成像光学系统，结构简单，而且在收集LED光源发散的光线的同时在短距离内在与光线出射方向垂直的平面上得到颜色和照度均匀的光斑。
为解决上述技术问题，本实用新型的技术方案是：一种聚光匀光成像光学系统，包括LED光源、聚光匀光部分和成像部分，所述聚光匀光部分按照光路方向依次包括第一透镜和第二透镜；所述第一透镜包括底面、表面和位于底面与表面之间的侧面；所述底面设有向第一透镜内凹陷且用于容置LED灯珠的腔体，所述腔体的顶部 设有弧形凸起，所述腔体表面形成光线入射面；所述侧面由一段或多段对光线沿-4度到5度出射方向全反射出去的曲面构成，所述曲面形成光线反射面；所述表面设有微型珠面组，所述微型珠面组有由若干小曲面组成，所述微型珠面组形成光线出射面。本实用新型的聚光匀光部分具有聚光和匀光功能，第一透镜腔体形成的入射面和旋转曲面设计的反射面使光线在较短距离混合，在不改变发散角度或发散角度改变较小的情况下，第一透镜出射面设置微型珠面组使打出的光斑更均匀。本实用新型的光学系统，光线首先通过聚光匀光部分对光线进行聚光、混合和均匀化，使最后成像出来的光斑在较短距离照度和颜色更均匀。另外，反射面的曲面数量越多效果更佳，混光距离近，同时混光均匀。
作为改进，所述反射面朝光线反射方向的前端用于反射出5度方向的光线，所述反射面朝光线反射方向的后端用于反射出-4度方向的光线。
作为改进，所述第一透镜为旋转体。
作为改进，所述第二透镜入射面为凸弧面，其曲率半径为R45-70mm，出射面为平面，第二透镜的直径为40-60mm。
作为改进，所述第二透镜距离LED光源70-80mm。
作为改进，所述成像部分按照光路方向依次包括带有通光孔的屏板、第三透镜和第四透镜。
作为改进，所述第三透镜的入射面为平面，出射面为凸弧面，其曲率半径为R38-52mm，所述第四透镜的入射面为平面，出射面为凸弧面，其曲率半径为R48-80mm。
作为改进，所述通光孔的直径为25-40mm，所述第三透镜的直径为38-60mm，所述第四透镜的直径为50-65mm；所述通光孔距离第二透镜10-40mm，所述第三透镜距离通光孔20-40mm，所述第四 透镜距离第三透镜60-80mm。
作为改进，所述LED光源包括LED基板和LED灯珠，所述LED灯珠由单芯片或多芯片封装。
本实用新型与现有技术相比所带来的有益效果是：
本实用新型的光学系统，光线首先通过聚光匀光部分对光线进行聚光、混合和均匀化，使最后成像出来的光斑在较短距离照度和颜色更均匀。
附图说明
图1为本实用新型结构示意图。
图2为第一透镜剖面图。
图3为第一透镜俯视图。
图4为实施例1第一透镜光线反射图。
图5为实施例2第一透镜光线反射图。
图6为实施例3第一透镜光线反射图。
图7为聚光匀光部分的光路图。
具体实施方式
下面结合说明书附图对本实用新型作进一步说明。
实施例1
如图1所示，一种聚光匀光成像光学系统，包括LED光源1、聚光匀光部分和成像部分。
所述LED光源1包括LED基板和设于所述LED基板上的LED灯珠14，所述LED灯珠14由单芯片或多芯片封装而成。
如图2所示，所述聚光匀光部分按照光路方向依次包括第一透镜2和第二透镜3，所述第一透镜2为小角度聚光匀光透镜，所述 第一透镜2为旋转体，其包括底面、表面和位于底面与表面之间的侧面。所述底面设有向第一透镜内凹陷且用于容置LED灯珠14的腔体25，所述腔体25的顶部设有弧形凸起26，所述腔体25表面形成光线入射面21。所述侧面由一段或多段对光线沿-4度到5度出射方向全反射出去的曲面构成，所述曲面形成光线反射面22。如图3所示，所述表面设有微型珠面组27，所述微型珠面组27有由若干小曲面27组成，所述微型珠面组27形成光线出射面23。如图4所示，本实施例中，作为反射面22的侧面由一段曲面21a组成，曲面21a将光线a全反射后出射方向为5度，曲面21a将光线2全反射后方向为-4度，其他光线通过曲面全反射后出射方向均匀地分布在5度和-4度之间。如图7所示，本实施例得到的出射光线在第一透镜后100mm距离以内光斑不均匀，光斑中间呈黑心；出射光线在第一透镜2后100mm以外光斑颜色和照度较均匀，光线出射角度在±6度之间。所述第二透镜3入射面为凸弧面，其曲率半径为R45mm，出射面为平面，第二透镜3的直径为40mm。所述第二透镜3距离LED光源170mm。
如图1所示，所述成像部分按照光路方向依次包括带有通光孔的屏板4、第三透镜5和第四透镜6。所述第三透镜5的入射面为平面，出射面为凸弧面，其曲率半径为R38mm，所述第四透镜6的入射面为平面，出射面为凸弧面，其曲率半径为R48mm。所述通光孔的直径为25mm，所述第三透镜5的直径为38mm，所述第四透镜6的直径为50mm；所述通光孔距离第二透镜310mm，所述第三透镜5距离通光孔20mm，所述第四透镜6距离第三透镜560mm。
本实用新型第一透镜腔体25形成的入射面21和旋转曲面设计的反射面22使光线在较短距离混合，在不改变发散角度或发散角度改变较小的情况下，第一透镜出射面23设置微型珠面组27使打出 的光斑更均匀。另外，反射面的曲面数量越多效果更佳，混光距离近，同时混光均匀。
实施例2
如图1所示，一种聚光匀光成像光学系统，包括LED光源1、聚光匀光部分和成像部分。
所述LED光源1包括LED基板和设于所述LED基板上的LED灯珠14，所述LED灯珠14由单芯片或多芯片封装而成。
如图2所示，所述聚光匀光部分按照光路方向依次包括第一透镜2和第二透镜3。所述第一透镜2为小角度聚光匀光透镜，所述第一透镜2为旋转体，其包括底面、表面和位于底面与表面之间的侧面。所述底面设有向第一透镜内凹陷且用于容置LED灯珠14的腔体25，所述腔体25的顶部设有弧形凸起26，所述腔体25表面形成光线入射面21。所述侧面由一段或多段对光线沿-4度到5度出射方向全反射出去的曲面构成，所述曲面形成光线反射面22。如图3所示，所述表面设有微型珠面组27，所述微型珠面组27有由若干小曲面27组成，所述微型珠面组27形成光线出射面23。如图5所示，本实施例中，作为反射面22的侧面由两段曲面组成，光线a通过第一曲面21b全反射后出射角度为5度，光线b通过第一曲面21b全反射后出射角度为-4度，其他光线通过曲面全反射后出射方向均匀分布于5度和-4度之间。与光线b临近的光线通过第二曲面22b全反射后光线出射角为5度，光线c通过第二曲面22b全反射后出射光线角度为-4度，光线b和光线c之间的光线通过第二曲面22b全反射后的光线方向均匀分布在5度和-4度之间。如图7所示，所有出射光线在第一透镜2后80mm以外光斑颜色和照度较均匀，80mm距离以内光斑不均匀，光斑中间有黑心，整个第一透镜2的光线出射角度在±5度之间。所述第二透镜3入射面为凸弧面，其 曲率半径为R60mm，出射面为平面，第二透镜3的直径为50mm。所述第二透镜3距离LED光源175mm。
如图1所示，所述成像部分按照光路方向依次包括带有通光孔的屏板4、第三透镜5和第四透镜6。所述第三透镜5的入射面为平面，出射面为凸弧面，其曲率半径为R45mm，所述第四透镜6的入射面为平面，出射面为凸弧面，其曲率半径为R60mm。所述通光孔的直径为32mm，所述第三透镜5的直径为45mm，所述第四透镜6的直径为60mm；所述通光孔距离第二透镜325mm，所述第三透镜5距离通光孔30mm，所述第四透镜6距离第三透镜570mm。
本实用新型第一透镜腔体25形成的入射面21和旋转曲面设计的反射面22使光线在较短距离混合，在不改变发散角度或发散角度改变较小的情况下，第一透镜出射面23设置微型珠面组27使打出的光斑更均匀。另外，反射面的曲面数量越多效果更佳，混光距离近，同时混光均匀。
实施例3
如图1所示，一种聚光匀光成像光学系统，包括LED光源1、聚光匀光部分和成像部分。
所述LED光源1包括LED基板和设于所述LED基板上的LED灯珠14，所述LED灯珠14由单芯片或多芯片封装而成。
如图1所示，所述聚光匀光部分按照光路方向依次包括第一透镜2和第二透镜3。所述第一透镜2为小角度聚光匀光透镜，所述第一透镜2为旋转体，其包括底面、表面和位于底面与表面之间的侧面。所述底面设有向第一透镜内凹陷且用于容置LED灯珠14的腔体25，所述腔体25的顶部设有弧形凸起26，所述腔体25表面形成光线入射面21。所述侧面由一段或多段对光线沿-4度到5度出射方向全反射出去的曲面构成，所述曲面形成光线反射面22。如图3 所示，所述表面设有微型珠面组27，所述微型珠面组27有由若干小曲面27组成，所述微型珠面组27形成光线出射面23。如图6所示，本实施例中，作为反射面22的侧面由三段曲面组成，光线a通过第一曲面21c全反射后出射角度为5度，光线b通过第一曲面21c全反射后出射角度为-4度，其他光线通过曲面全反射后出射方向均匀分布于5度和-4度之间。与光线b临近的光线通过第二曲面22c全反射后光线出射角为5度，光线c通过第二曲面22c全反射后出射光线角度为-4度，光线b和光线c之间的光线通过第二曲面22c全反射后的光线方向均匀分布在5度和-4度之间。与光线c临近的光线通过第三曲面23c全反射后光线出射角为5度，光线d通过第三曲面23c全反射后出射光线角度为-4度，光线c和光线d之间的光线通过第三曲面23c全反射后的光线方向均匀分布在5度和-4度之间。如图7所示，所有出射光线在第一透镜2后60mm以外光斑颜色和照度较均匀，60mm距离以内光斑不均匀，光斑中间有黑心，整个第一透镜2的光线出射角度在±5度之间，在较短的距离内60mm左右角度较小，光斑较均匀。所述第二透镜3入射面为凸弧面，其曲率半径为R70mm，出射面为平面，第二透镜3的直径为60mm。所述第二透镜3距离LED光源180mm。
如图1所示，所述成像部分按照光路方向依次包括带有通光孔的屏板4、第三透镜5和第四透镜6。所述第三透镜5的入射面为平面，出射面为凸弧面，其曲率半径为R52mm，所述第四透镜6的入射面为平面，出射面为凸弧面，其曲率半径为R80mm。所述通光孔的直径为40mm，所述第三透镜5的直径为60mm，所述第四透镜6的直径为65mm；所述通光孔距离第二透镜340mm，所述第三透镜5距离通光孔40mm，所述第四透镜6距离第三透镜580mm。
本实用新型第一透镜腔体25形成的入射面21和旋转曲面设计 的反射面22使光线在较短距离混合，在不改变发散角度或发散角度改变较小的情况下，第一透镜出射面23设置微型珠面组27使打出的光斑更均匀。另外，反射面的曲面数量越多效果更佳，混光距离近，同时混光均匀。

Claims (9)

  1. 一种聚光匀光成像光学系统，包括LED光源、聚光匀光部分和成像部分，其特征在于：所述聚光匀光部分按照光路方向依次包括第一透镜和第二透镜；所述第一透镜包括底面、表面和位于底面与表面之间的侧面；所述底面设有向第一透镜内凹陷且用于容置LED灯珠的腔体，所述腔体的顶部设有弧形凸起，所述腔体表面形成光线入射面；所述侧面由一段或多段对光线沿-4度到5度出射方向全反射出去的曲面构成，所述曲面形成光线反射面；所述表面设有微型珠面组，所述微型珠面组有由若干小曲面组成，所述微型珠面组形成光线出射面。
  2. 根据权利要求1所述的聚光匀光成像光学系统，其特征在于：所述反射面朝光线反射方向的前端用于反射出5度方向的光线，所述反射面朝光线反射方向的后端用于反射出-4度方向的光线。
  3. 根据权利要求1所述的聚光匀光成像光学系统，其特征在于：所述第一透镜为旋转体。
  4. 根据权利要求1所述的聚光匀光成像光学系统，其特征在于：所述第二透镜入射面为凸弧面，其曲率半径为R45-70mm，出射面为平面，第二透镜的直径为40-60mm。
  5. 根据权利要求4所述的聚光匀光成像光学系统，其特征在于：所述第二透镜距离LED光源70-80mm。
  6. 根据权利要求1所述的聚光匀光成像光学系统，其特征在于：所述成像部分按照光路方向依次包括带有通光孔的屏板、第三 透镜和第四透镜。
  7. 根据权利要求6所述的聚光匀光成像光学系统，其特征在于：所述第三透镜的入射面为平面，出射面为凸弧面，其曲率半径为R38-52mm，所述第四透镜的入射面为平面，出射面为凸弧面，其曲率半径为R48-80mm。
  8. 根据权利要求7所述的聚光匀光成像光学系统，其特征在于：所述通光孔的直径为25-40mm，所述第三透镜的直径为38-60mm，所述第四透镜的直径为50-65mm；所述通光孔距离第二透镜10-40mm，所述第三透镜距离通光孔20-40mm，所述第四透镜距离第三透镜60-80mm。
  9. 根据权利要求7所述的聚光匀光成像光学系统，其特征在于：所述LED光源包括LED基板和LED灯珠，所述LED灯珠由单芯片或多芯片封装。
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