WO2017071520A1 - 一种照明灯具 - Google Patents

一种照明灯具 Download PDF

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Publication number
WO2017071520A1
WO2017071520A1 PCT/CN2016/102744 CN2016102744W WO2017071520A1 WO 2017071520 A1 WO2017071520 A1 WO 2017071520A1 CN 2016102744 W CN2016102744 W CN 2016102744W WO 2017071520 A1 WO2017071520 A1 WO 2017071520A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
lens
optical axis
beam splitting
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PCT/CN2016/102744
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English (en)
French (fr)
Inventor
王万林
Original Assignee
欧普照明股份有限公司
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Publication date
Priority claimed from CN201510712816.1A external-priority patent/CN105221942A/zh
Priority claimed from CN201520844828.5U external-priority patent/CN205090204U/zh
Application filed by 欧普照明股份有限公司 filed Critical 欧普照明股份有限公司
Publication of WO2017071520A1 publication Critical patent/WO2017071520A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means

Definitions

  • the present invention relates to a lighting device, and more particularly to an LED lighting fixture.
  • LEDs have been popularized for lighting fixtures.
  • the color quality of LEDs is required to be higher and higher in specific illuminations, and the light color distribution requirements of the object surface are getting higher and higher to meet the humanized needs of the face.
  • LED is 180° illumination, glare is serious, and the effect of flare effect is uneven.
  • a narrow angle beam is needed, which requires the design of the optical system of the LED with the focused beam.
  • the common light mixing technology adopts dense arrangement of LEDs and Fresnel lens. This technology requires concentrated light source arrangement, heat dissipation is difficult to solve, and it is difficult to achieve optimized light distribution.
  • Another common technique is to use a collimating lens array with a pair of fly-eye lenses that are complex and have low optical efficiency.
  • the invention discloses a lighting fixture, comprising a beam splitting lens with an optical axis, a light source and a reflector arranged in the direction of extending the optical axis, and a light mixing component between the light source and the beam splitting lens. And the optical axis passes through the light mixing component, and the emitted light of the light source is transmitted to the spectroscopic lens after being mixed by the light mixing component.
  • the light source is fixed on a substrate
  • the light mixing assembly comprises a light mixing bracket fixed on the substrate, and a diffusion element fixed on the light mixing bracket, the light mixing bracket having a hollow cavity that penetrates in the direction of the optical axis, the hollow cavity surrounds the optical axis and the light source; the diffusion element is disposed between the hollow cavity and the lens and covers the hollow cavity.
  • the light mixing component is a light mixing lens disposed on the light source, the mixing The optical lens is coaxial with the optical splitting lens.
  • the light source is fixed on a substrate
  • the light mixing lens includes an incident surface close to the light source, an exit surface close to the spectroscopic lens, and a connection surface connecting the incident surface and the exit surface
  • An entrance mask is disposed on the light source, and the connection surface is fixed on the substrate.
  • the incident surface is a hemispherical surface
  • the exit surface is a semi-ellipsoidal surface
  • the beam splitting lens comprises an annular bottom surface flush with the bottom of the reflector, an inner surface concave from the inner side of the bottom surface, and an outer surface convex outward from the outer side of the bottom surface
  • the inner surface includes a concavely formed top surface, and a side surface connecting the inner side of the bottom surface and the edge of the top surface, the optical axis passing through a center of the top surface, the side surface surrounding the optical axis, incident Light to the side is refracted toward the reflector, and light incident on the top surface is refracted toward the optical axis, and light transmitted from the side is refracted through the outer surface and exits to the reflector.
  • the angle of the light refracted by the spectroscopic lens from the top surface is 0-20° from the optical axis, and the angle of the light refracted from the side surface to the optical axis is 20-70°.
  • the outer surface of the spectroscopic lens is a hemispherical or hemispherical shape having an axis of symmetry of the optical axis.
  • the top surface of the spectroscopic lens is a convex surface that protrudes toward the light source.
  • the convex surface is made by matte sanding.
  • the spectroscopic lens has an inner surface adjacent to the light source and an outer surface away from the light source, the inner surface being recessed away from the light source to form an inner space, the exit surface extending into the In the interior space.
  • the reflector has a cross-sectional shape that is parabolic and has a grid-like surface texture.
  • the plurality of light sources are provided, and each of the light sources is provided with one of the beam splitting lenses; and the plurality of beam splitting lenses form a beam splitting lens group.
  • the light source is an LED light source.
  • the lighting fixture of the present invention is provided with a light mixing component between the LED light source and the beam splitting lens, so that the light emitted from the LED light source passes through a uniform light before being injected into the beam splitting lens. Thereby, a more collimated and uniform light distribution can be obtained.
  • a lighting fixture having the above structure of the present invention has a spot having high optical efficiency, high central light intensity, low glare value, and uniform light color.
  • the lighting fixture of the present invention can produce light distribution of various narrow, medium and wide beams according to the requirements of the lighting occasion.
  • FIG. 1 is a schematic view of a lighting fixture equipped with a light mixing bracket and a schematic diagram of an optical path in accordance with a preferred embodiment of the present invention
  • FIG. 2 is a schematic structural view of a light mixing bracket in a lighting fixture according to a preferred embodiment of the present invention
  • FIG 3 is a schematic view of a lighting fixture in accordance with a preferred embodiment of the present invention equipped with a light mixing lens.
  • A-first outgoing light B-second outgoing light.
  • a lighting fixture includes a beam splitting lens 1, a light source 2, a reflector 3, and a light mixing assembly 4, wherein the beam splitting lens 1 has an optical axis 11 and a light source 2
  • the light mixing assembly 4 and the reflector 3 are sequentially disposed along the extending direction of the optical axis 11, so that the light source 2 can emit the paraxially emitted light along the optical axis 11, firstly mixed by the light mixing assembly 4, and then passed through the beam splitting lens. 1 and the reflector 3 are equipped with light to finally obtain collimated and uniformized parallel outgoing light.
  • the light source 2 can be a solid state light source, such as an LED light source.
  • the reflector 3 has a cup shape. Including the cup bottom 31, the cup body 32 and the cup mouth 33, it is known from common knowledge that the diameter of the cup opening 33 is larger than the cup bottom 31, so the cup bottom 31 of the reflector 3 is placed close to the light source 2, so that the direction along the optical axis 11 Above, the light source 2 and the reflector 3 form a diffusing optical system; at the same time, the spectroscopic lens 1 is disposed on the cup bottom 31 of the reflector 3, and is integrally surrounded by the cup 32 of the reflector 3, thus ensuring the splitting. The light refracted by the lens 1 does not exit the reflector 3 in a direction away from the optical axis 11.
  • a light mixing component 4 is further disposed between the light source 2 and the beam splitting lens 1 , and the light mixing component 4 structurally views the light source 2 It is spaced apart from the spectroscopic lens 1 and the reflector 3 so that the outgoing light of the light source 2 can form a certain incident angle when it is irradiated onto the spectroscopic lens 1.
  • the optical axis 11 passes through the light mixing assembly 4, that is, the light mixing assembly 4 is disposed around the optical axis 11, so that the light emitted from the light source 2 can be transmitted to the light splitting after being mixed by the light mixing assembly 4.
  • Lens 1 the optical axis 11
  • the light emitted from the light source 2 can be uniformly homogenized before being incident on the spectroscopic lens 1, thereby obtaining a more collimated and uniform light distribution, improving optical efficiency, central light intensity, and reducing glare value. .
  • the light mixing component 4 used therein can have the following two configuration schemes, specifically:
  • the light mixing assembly 4 includes a light mixing bracket 41 fixed on the substrate 21, and diffusion spread on the light mixing bracket 41.
  • the light mixing bracket 41 has a hollow cavity 43 penetrating in the direction of the optical axis 11, the hollow cavity 43 surrounding the optical axis 11 and the light source 2; at the same time, the diffusion element 42 is disposed between the hollow cavity 43 and the beam splitting lens 1 And covering the hollow body 43. 1 and 2, such a light mixing assembly 4 is added between the light source 2 and the beam splitting lens 1.
  • the optical path of the light emitted from the light source 2 before being irradiated to the beam splitting lens 1 can be increased, thereby being adjustable.
  • Different thicknesses of the light mixing bracket 41 adjust the incident angle of the light incident lens 1 to generate light distribution rays of various narrow, medium and wide light beams, and on the other hand, may pass through the diffusing element 42 before being irradiated to the spectroscopic lens 1. Mix light once to ensure the uniformity of the final light and the center light intensity.
  • the light mixing unit 4 is a light mixing lens 44 that is disposed on the light source 2, and the light mixing lens 44 and the beam splitting lens 1 share the optical axis 11.
  • the first light mixing is performed by the light mixing lens 44, thereby ensuring the uniformity of the finally emitted light and the center light intensity.
  • the light source 2 is fixed on the substrate 21.
  • the light mixing lens 44 includes a relatively disposed incident surface 45, an exit surface 46, and a connecting surface 47 connecting the incident surface 45 and the exit surface 46.
  • the incident surface 45 is adjacent to the light source 2, and is covered.
  • the exit surface 46 is close to the spectroscopic lens 1, and the connection surface 47 is fixed to the substrate 21.
  • the entrance face 45 is shaped as a hemisphere and the exit face 46 is shaped as a semi-ellipsoid.
  • the beam splitting lens 1 employs a structure having a concavely formed inner space 12 into which the exit surface 46 extends. According to the light mixing lens 44 configured in the above embodiment, the light emitted by the point source or the light source 2 of the point source can be initially diffused, and then the light is collimated by the beam splitting lens 1 to be emitted, thereby obtaining uniform light color and central light intensity. High and low glare spot.
  • the beam splitting lens 1 is a lens having a collecting function, and includes a bottom surface 13, an inner surface and an outer surface 14, wherein the bottom surface 13 is It is annular and flush with the cup bottom 31, and can be fixed together with the cup bottom 31 on the light mixing bracket 41, the light mixing lens 44 or other mounting base (not shown) in the above embodiment;
  • the inner surface is from the bottom surface 13
  • the inner side is recessed inwardly away from the light source 2, thereby forming a structure including a top surface 15 and a side surface 16, the top surface 15 being an inwardly concave surface formed at a distance from the bottom surface 13 and in the reflector 3, the optical axis 11
  • the side surface 16 is the edge connecting the top surface 15 and the inner side of the bottom surface 13, surrounding the cylinder of the optical axis 11, the top surface 15 and the side surface 16 are both for refracting the light emitted by the light source 2;
  • the light emitted from the light source 2 is divided into two portions when it is irradiated onto the spectroscopic lens 1, and a part of the light incident on the side surface 16 is refracted toward the reflector 3, and the other portion is incident on the top surface.
  • the light of 15 is refracted toward the optical axis 11, and the light transmitted from the side surface 16 is refracted by the outer surface 14 and then emitted to the reflector 3, and is reflected by the reflector 3 out of the first outgoing light A parallel to the optical axis 11, from the top surface 15
  • the transmitted light is refracted through the outer surface 14 and exits to form a second exiting light B that is adjacent and parallel to the optical axis 11.
  • the spectroscopic lens 1 is a structure in which the outgoing light of the light source 2 is divided into an intermediate portion and an edge portion to form two refractions, respectively, such that among the light rays emitted from the light source 2, the small-angle light passes through the top surface 15 and the outside.
  • the surface 14 is collimated to form a first outgoing light A near the optical axis 11, and the large angle light is reflected by the side surface 16 and the outer surface 14 and then reflected by the reflector 3 to form a second outgoing light B parallel to the optical axis 11. Since the first outgoing light A and the second outgoing light B are in different regions due to the focused light distribution, the outgoing light beams at both the center and the edge are uniform in color, and no stray light or ghosting occurs.
  • the top surface 15 of the spectroscopic lens 1 is a convex surface that is convex toward the light source 2, so that a structure of a lenticular lens is formed in the middle portion of the spectroscopic lens 1, and a plano-convex lens is formed at the edge portion.
  • the structure of the lenticular lens enhances the collimation effect of the narrow beam in the middle portion and can be applied to occasions where accent lighting is required.
  • the convex surface is made by matte sanding during production to avoid imaging phenomenon of the lenticular lens in the middle portion of the spectroscopic lens 1, and to partially scatter light to fill the first outgoing light A and the second outgoing light B The gap between them thus eliminating glare.
  • the angle of incidence and the ratio of the exiting light of the source 2 received by the top surface 15 and the side surface 16 of the beam splitting lens 1 can be adjusted.
  • the angle of the light refracted by the spectroscopic lens 1 from the top surface 15 to the optical axis 11 is 0-20°, at which time the top surface 15 receives a small angle of light that is emitted by the light source 2, from the side.
  • the angle between the refracted light and the optical axis 11 is 20-70°.
  • the side 16 receives the large-angle light emitted by the light source 2, and the small-angle light passes through the intermediate portion for secondary collimation, especially the lenticular lens collimation.
  • the first outgoing light A is formed, and the large-angle light passes through the reflection of the plano-convex lens and the reflection of the reflector 3 to form the second outgoing light B, and finally forms a narrow beam light distribution with uniform emission and high central intensity. It is of course also possible to adjust the size ratio of the top surface 15 and the side surface 16 of the spectroscopic lens 1 according to actual application requirements to allocate the ratio of the narrow beam to the wide beam.
  • the outer surface 14 of the spectroscopic lens 1 is a hemispherical or hemispherical shape having an optical axis 11 as an axis of symmetry to enhance the effect of secondary refraction.
  • the outer surface 14 may be formed by symmetrical rotation of any free curved surface to perform secondary refraction of the emitted light, but the shape of the curved surface is such that the light reflected from the reflector 3 and the light emitted from the outer surface 14 are The first outgoing light A and the second outgoing light B are parallel to the optical axis 11.
  • the side surface 16 of the inner surface of the spectroscopic lens 1 is formed into a toroidal cylinder having an angle with the optical axis 11 during the manufacturing process due to the limitation of the production mold.
  • the structure is formed as a cylindrical surface inclined by 1 to 5 to the optical axis 11.
  • the cross-sectional shape of the cup 32 of the reflector 3 is parabolic and has a grid-like surface texture 34 such that the spectroscopic lens 1 disposed at the bottom of the reflector 3 approximates the focus disposed at the parabola
  • the grid-like texture on the surface of the cup 32 can be In order to correct some light that cannot be emitted in parallel, the second outgoing light B has higher collimation and more uniform light color.
  • the number of light sources is plural, and each of the light sources is provided with a beam splitting lens 1; the plurality of beam splitting lenses 1 form a beam splitting lens group. Since a plurality of light sources are generally provided in the existing spotlights, and each of the light sources 2 is provided with the beam splitting lens 1 of the above embodiment, the plurality of beam splitting lenses 1 form a beam splitting lens group.
  • the beam splitting lens group can be integrally formed and matched to be disposed on a corresponding light source.
  • the light source 2 can be selected from a solid state light source, such as an LED light source.
  • the lighting fixture according to the above configuration of the present invention is provided with a light mixing assembly 4 between the light source 2 and the beam splitting lens 1 so that the light emitted from the light source 2 passes through a uniform light before being incident on the beam splitting lens 1, thereby enabling more collimation.
  • Uniform light distribution featuring high optical efficiency, high central light intensity, low glare value, and uniform light spot. And according to the needs of lighting occasions, the light distribution of various narrow and medium-width beams can be generated.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

一种照明灯具，包括具有光轴的分光透镜(1)，依次沿所述光轴延伸方向上设置的光源(2)和反射器(3)，在所述光源(2)与所述分光透镜(1)之间还设置有一混光组件(4)，所述光轴穿过所述混光组件(4)，所述光源(2)的出射光经所述混光组件(4)的混光后透射至所述分光透镜(1)。在光源(2)和分光透镜(1)之间设置一个混光组件(4)，使得光源(2)的出射光在射入分光透镜(1)之前就经过了一次匀光，从而能够得到更加准直均匀的配光，具有光学效率高、中心光强高、低眩光值、均匀光色的光斑的特点。并且可以根据照明场合的需求，产生各种窄、中、宽光束的配光光线。

Description

一种照明灯具 技术领域
本发明涉及照明装置，尤其涉及一种LED照明灯具。
背景技术
目前，LED用于照明灯具已经开始普及，LED的光色品质要求在特定的照面也越来越高，被照物面的光色分布要求越来越高，来满足照面的人性化需求。但是LED是180°发光，眩光严重，光斑效果过渡不均等特点，在店铺、艺术馆、会议室等商业照明领域，需要用到窄角度光束，这就需要LED配合聚焦光束的光学系统设计。
目前常见的混光技术是采用LED的密集排布配合菲涅尔透镜，这种技术需要光源排布集中，散热难以解决，并且很难实现优化的配光。另外一种常见技术是采用准直透镜阵列配合一对复眼透镜，这种所需光学元件复杂，光学效率低。
因此，如何产生光色均匀的准直配光光束，是一项迫切需要的技术。
发明内容
为了克服上述技术缺陷，本发明的目的在于提供一种能够产生光色均匀的准直配光光束的照明灯具。
本发明公开了一种照明灯具，包括具有光轴的分光透镜，依次沿所述光轴延伸方向上设置的光源和反射器，在所述光源与所述分光透镜之间还设置有一混光组件，所述光轴穿过所述混光组件，所述光源的出射光经所述混光组件的混光后透射至所述分光透镜。
优选地，所述光源固定在基板上，所述混光组件包括固定在所述基板上的混光支架，以及固定在所述混光支架上的扩散元件，所述混光支架具有沿所述光轴方向贯通的中空腔体，所述中空腔体围绕所述光轴和所述光源；所述扩散元件设置在所述中空腔体和所述透镜之间，并覆盖所述中空腔体。
优选地，所述混光组件是罩设在所述光源上的混光透镜，所述混 光透镜与所述分光透镜同光轴。
优选地，所述光源固定在基板上，所述混光透镜包括靠近所述光源的入射面、靠近所述分光透镜的出射面以及连接所述入射面和所述出射面的连接面，所述入射面罩设在所述光源上，所述连接面固定在所述基板上。
优选地，所述入射面为半球面，所述出射面为半椭球面。
优选地，所述分光透镜包括与所述反射器的底部平齐的环形底面，自所述底面的内侧向内凹的内表面，以及自所述底面的外侧向外凸的外表面，所述内表面包括内凹形成的顶面，以及连接所述底面的内侧和所述顶面的边缘的侧面，所述光轴穿过所述顶面的中心，所述侧面环绕所述光轴，入射至所述侧面的光向所述反射器方向折射，入射至所述顶面的光向所述光轴折射，从所述侧面透射的光经所述外表面折射后出射至所述反射器，并由所述反射器反射出平行于所述光轴的第一出射光，从所述顶面透射的光经所述外表面折射后出射，形成一靠近且平行于所述光轴的第二出射光。
优选地，所述分光透镜从所述顶面折射的光与所述光轴的夹角为0-20°，从所述侧面折射的光与所述光轴的夹角为20-70°。
优选地，所述分光透镜的外表面是以所述光轴为对称轴的半球形或类半球形。
优选地，所述分光透镜的顶面为向所述光源方向凸出的凸面。
优选地，所述凸面经雾面磨砂制成。
优选地，所述分光透镜具有靠近所述光源的内表面和与远离所述光源的外表面，所述内表面沿远离所述光源方向内凹形成一内部空间，所述出射面伸入所述内部空间中。
优选地，所述反射器的截面形状为抛物线，且具有网格状表面纹理。
优选地，所述光源为多个，每一所述光源外均设有一所述分光透镜；多个所述分光透镜形成一分光透镜组。
优选地，所述光源为LED光源。
采用了上述技术方案后，与现有技术相比，具有以下有益效果：
1.本发明的照明灯具在LED光源和分光透镜之间设置一个混光组件，使得LED光源的出射光在射入分光透镜之前就经过了一次匀光， 从而能够得到更加准直均匀的配光。
2.具有本发明上述结构的照明灯具具有光学效率高、中心光强高、低眩光值、均匀光色的光斑。
3.本发明的照明灯具可以根据照明场合的需求，产生各种窄中宽光束的配光。
附图说明
图1为符合本发明优选实施例的照明灯具中装配有混光支架的示意图以及光路示意图；
图2为符合本发明优选实施例的照明灯具中混光支架的结构示意图；
图3为符合本发明优选实施例的照明灯具中装配有混光透镜的示意图。
附图标记：
1-分光透镜，11-光轴，12-内部空间，13-底面，14-外表面，15-顶面，16-侧面；
2-LED光源，21-基板；
3-反射器，31-杯底，32-杯身，33-杯口，34-表面纹理；
4-混光组件；41-混光支架，42-扩散元件，43-中空腔体，44-混光透镜，45-入射面，46-出射面，47-连接面；
A-第一出射光，B-第二出射光。
具体实施方式
以下结合附图与具体实施例进一步阐述本发明的优点。
如图1所示，在符合本发明的一个优选实施例中，一种照明灯具包括分光透镜1、光源2、反射器3和混光组件4，其中分光透镜1具有一条光轴11，光源2、混光组件4和反射器3依次沿该光轴11的延伸方向设置，从而使得光源2能够沿着光轴11发射出近轴出射光，先经过混光组件4混光，再经过分光透镜1和反射器3配光，最终获得经过准直和匀光的平行出射光。在本发明的优选实施例中，光源2可以是一种固态光源，例如LED光源。
在符合上述优选实施例的照明灯具中，反射器3的形状呈杯状， 包括杯底31、杯身32和杯口33，由常识可知，杯口33的口径是大于杯底31的，因此将反射器3的杯底31靠近光源2设置，这样在沿光轴11方向上看，光源2和反射器3就形成了一个扩散光学系统；同时，将分光透镜1设置在反射器3的杯底31，并且被反射器3的杯身32整体包围，这样保证了经过分光透镜1折射后的光线不会朝偏离光轴11的方向向反射器3外射出。
此外，为了产生更加准直、均匀的配光，上述实施例中的照明灯具中，光源2与分光透镜1之间还设置了混光组件4，该混光组件4从结构上看将光源2与分光透镜1和反射器3分隔开来，使得光源2的出射光能够在照射到分光透镜1上时形成一定的入射角度。在该混光组件4中，光轴11穿过混光组件4，即混光组件4是围绕光轴11设置的，使得光源2的出射光经过混光组件4的混光后能够透射至分光透镜1。采用上述配置的照明灯具，能够使得光源2的出射光在射入分光透镜1之前就经过了一次匀光，从而能够得到更加准直均匀的配光，提高光学效率、中心光强，降低眩光值。
根据上述实施例配置的照明灯具中，其所使用的混光组件4可以有以下两种配置方案，具体为：
其一，如图2所示，在照明灯具中，光源2是固定在基板21上的，混光组件4包括固定在基板21上的混光支架41，以及固定在混光支架41上的扩散元件42，混光支架41具有沿光轴11方向贯通的中空腔体43，中空腔体43环绕该光轴11和光源2；同时，扩散元件42设置在中空腔体43和分光透镜1之间，并覆盖中空腔体43。结合图1和图2可知，在光源2和分光透镜1之间增加了这样一个混光组件4，一方面可以增加光源2的出射光在照射到分光透镜1之前的光程，从而可以通过调节混光支架41的不同厚度来调节照射到分光透镜1上的入射角度，产生各种窄、中、宽光束的配光光线，另一方面可以在照射到分光透镜1之前先经过扩散元件42经过一次混光，从而保证最终出射的光线的均匀度和中心光强。
其二，如图3所示，在照明灯具中，混光组件4是罩设在光源2上的混光透镜44，混光透镜44与分光透镜1共光轴11。在光源2的出射光照射到分光透镜1之前，先通过混光透镜44进行初次混光，从而保证最终出射的光线的均匀度和中心光强。在一个具体实施例中， 光源2是固定在基板21上的，该混光透镜44包括相对设置的入射面45、出射面46以及连接入射面45和出射面46的连接面47，其中入射面45靠近光源2，罩设在光源2上，出射面46靠近分光透镜1，连接面47固定在基板21上。在一个优选实施例中，入射面45形状呈为半球面，出射面46形状呈为半椭球面。在另一个优选实施例中，分光透镜1采用一种具有内凹形成的内部空间12的结构，出射面46就伸入这一内部空间12中。根据上述实施例配置的混光透镜44，可以将点光源或者近似点光源的光源2的出射光进行初步扩散，再经过分光透镜1配光准直后出射，从而得到光色均匀、中心光强高、低眩光值的光斑。
如图1和图3所示，在符合本发明优选实施例的照明灯具中，分光透镜1是一种具有聚光功能的透镜，其包括底面13、内表面和外表面14，其中底面13呈环形，且与杯底31平齐，可与杯底31一起固定在上述实施例中的混光支架41、混光透镜44上或者其他安装基础(未图示)上；内表面自底面13的内侧沿远离光源2方向向内凹，从而形成包括有顶面15和侧面16的结构，顶面15为向内凹形成的与底面13相距一定距离且在反射器3中的表面，光轴11穿过顶面15的中心，侧面16则为连接顶面15的边缘和底面13的内侧，环绕光轴11的柱面，顶面15和侧面16均用于折射光源2的出射光；外表面14自底面13的外侧沿远离光源2向外凸，与内表面相对，用于透射光线。根据上述实施例中的分光透镜1，从光源2出射的光线照射到分光透镜1上时被分为两个部分，一部分入射至侧面16的光向反射器3方向折射，另一部分入射至顶面15的光向光轴11折射，从侧面16透射的光经外表面14折射后出射至反射器3，并由反射器3反射出平行于光轴11的第一出射光A，从顶面15透射的光经外表面14折射后出射，形成一靠近且平行于光轴11的第二出射光B。根据上述配置的分光透镜1是一种将光源2的出射光分为中间部分和边缘部分分别形成两次折射的结构，这样，从光源2出射的光线中，小角度光线经过顶面15和外表面14的准直后形成靠近光轴11的第一出射光A，大角度光线经过侧面16和外表面14的折射再经过反射器3的反射后形成平行于光轴11的第二出射光B，第一出射光A与第二出射光B由于聚焦配光在不同区域，因此在中心和边缘两部分的出射光束光色均匀，不会有杂光或重影的出现。
在本发明的一个优选实施例中，分光透镜1的顶面15为向光源2方向凸出的凸面，从而在分光透镜1的中间部分形成双凸透镜的结构，在边缘部分形成平凸透镜的结构，双凸透镜的结构能够加强中间部分窄光束的准直效果，可应用在需要重点照明的场合。优选地，该凸面在生产过程中经雾面磨砂制成，以避免分光透镜1中间部分的双凸透镜出现成像现象，并且能够将部分光线散射，从而填补第一出射光A和第二出射光B之间的缝隙，从而消除眩光。
对于本发明优选实施例而言，分光透镜1的顶面15和侧面16所接收的光源2的出射光的入射角度和比例是可以调节的。例如，在一实施例中，分光透镜1从顶面15折射的光与光轴11的夹角为0-20°，这时顶面15所接收的为光源2出射的小角度光线，从侧面16折射的光与光轴11的夹角为20-70°，这时侧面16所接收的为光源2出射的大角度光线，小角度光线经过中间部分的二次准直尤其是双凸透镜准直形成第一出射光A，大角度光线经过平凸透镜的折射和反射器3的反射后形成第二出射光B，最终形成均匀出射、中心光强高的窄光束配光。当然也可以根据实际应用需求，调节分光透镜1的顶面15和侧面16的尺寸比例，以分配出射的窄光束和宽光束的比例。
在一实施例中，分光透镜1的外表面14是以光轴11为对称轴的半球形或类半球形，以加强二次折射的效果。该二次折射效果越大时，入射到反射器3的反射点也就越靠近反射器3的底部，反射器3的尺寸便可设计的更小。不过，上述实施例中，外表面14也可以是任意自由曲面对称旋转形成，对出光进行二次折射，但曲面的形状应保证从反射器3反射出的光和从外表面14出射的光为平行于光轴11的第一出射光A及第二出射光B。
在本发明的优选实施例中，分光透镜1在制作过程中，由于生产模具的限制，将分光透镜1的内表面中的侧面16制成具有与光轴11成一定角度内收的环形柱面结构，形成为向光轴11倾斜1°至5°的圆柱面。
在本发明的优选实施例中，反射器3的杯身32的截面形状为抛物线，且具有网格状表面纹理34，这样，设置在反射器3底部的分光透镜1近似于设置在抛物线的焦点上，根据数学定律，可以保证第二出射光B基本都是平行出射光，进一步地，杯身32表面的网格状纹理可 以修正一些不能平行出射的光线，从而使得第二出射光B的准直度更高、光色更均匀。
本发明的另一优选实施例中，光源的数量为多个，每一光源外均设有一分光透镜1；多个分光透镜1形成一分光透镜组。由于现有聚光灯中一般均设有多个光源，对于每一光源2，均设有一上述实施例中的分光透镜1，则多个分光透镜1形成一分光透镜组。该分光透镜组可一体成型，匹配设置在对应的光源上。优选地，光源2可以选用一种固态光源，例如LED光源。
根据本发明上述配置的照明灯具在光源2和分光透镜1之间设置一个混光组件4，使得光源2的出射光在射入分光透镜1之前就经过了一次匀光，从而能够得到更加准直均匀的配光，具有光学效率高、中心光强高、低眩光值、均匀光色的光斑的特点。并且可以根据照明场合的需求，产生各种窄中宽光束的配光。
应当注意的是，本发明的实施例有较佳的实施性，且并非对本发明作任何形式的限制，任何熟悉该领域的技术人员可能利用上述揭示的技术内容变更或修饰为等同的有效实施例，但凡未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何修改或等同变化及修饰，均仍属于本发明技术方案的范围内。

Claims (14)

  1. 一种照明灯具，包括具有光轴的分光透镜，依次沿所述光轴延伸方向上设置的光源和反射器，其特征在于，
    在所述光源与所述分光透镜之间还设置有一混光组件，所述光轴穿过所述混光组件，所述光源的出射光经所述混光组件的混光后透射至所述分光透镜。
  2. 如权利要求1所述的照明灯具，其特征在于，所述光源固定在基板上，所述混光组件包括固定在所述基板上的混光支架，以及固定在所述混光支架上的扩散元件，所述混光支架具有沿所述光轴方向贯通的中空腔体，所述中空腔体围绕所述光轴和所述光源；所述扩散元件设置在所述中空腔体和所述透镜之间，并覆盖所述中空腔体。
  3. 如权利要求1所述的照明灯具，其特征在于，所述混光组件是罩设在所述光源上的混光透镜，所述混光透镜与所述分光透镜同光轴。
  4. 如权利要求3所述的照明灯具，其特征在于，所述光源固定在基板上，所述混光透镜包括靠近所述光源的入射面、靠近所述分光透镜的出射面以及连接所述入射面和所述出射面的连接面，所述入射面罩设在所述光源上，所述连接面固定在所述基板上。
  5. 如权利要求4所述的照明灯具，其特征在于，所述入射面为半球面，所述出射面为半椭球面。
  6. 如权利要求1至5任一项所述的照明灯具，其特征在于，所述分光透镜包括与所述反射器的底部平齐的环形底面，自所述底面的内侧向内凹的内表面，以及自所述底面的外侧向外凸的外表面，
    所述内表面包括内凹形成的顶面，以及连接所述底面的内侧和所述顶面的边缘的侧面，所述光轴穿过所述顶面的中心，所述侧面环绕所述光轴，
    入射至所述侧面的光向所述反射器方向折射，入射至所述顶面的 光向所述光轴折射，从所述侧面透射的光经所述外表面折射后出射至所述反射器，并由所述反射器反射出平行于所述光轴的第一出射光，从所述顶面透射的光经所述外表面折射后出射，形成一靠近且平行于所述光轴的第二出射光。
  7. 如权利要求6所述的照明灯具，其特征在于，所述分光透镜从所述顶面折射的光与所述光轴的夹角为0-20°，从所述侧面折射的光与所述光轴的夹角为20-70°。
  8. 如权利要求6所述的照明灯具，其特征在于，所述分光透镜的外表面是以所述光轴为对称轴的半球形或类半球形。
  9. 如权利要求8所述的照明灯具，其特征在于，所述分光透镜的顶面为向所述光源方向凸出的凸面。
  10. 如权利要求9所述的照明灯具，其特征在于，所述凸面经雾面磨砂制成。
  11. 如权利要求4或5所述的照明灯具，其特征在于，所述分光透镜具有靠近所述光源的内表面和与远离所述光源的外表面，所述内表面沿远离所述光源方向内凹形成一内部空间，所述出射面伸入所述内部空间中。
  12. 如权利要求1所述的照明灯具，其特征在于，所述反射器的截面形状为抛物线，且具有网格状表面纹理。
  13. 如权利要求1所述的照明灯具，其特征在于，所述光源为多个，每一所述光源外均设有一所述分光透镜；多个所述分光透镜形成一分光透镜组。
  14. 如权利要求1或13所述的照明灯具，其特征在于，所述光源为LED光源。
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