201009254 九、發明說明： .【發明所屬之技術領域】 : 本發明涉及一種照明裝置，特別係一種能夠調整照明 -光場形狀之照明裝置。 【先前技術】 目前，發光二極體（Light Emitting Diode，LED)因具光 質佳（亦即光源述出之光譜）及發光效率高等特性而逐漸取 代冷陰極螢光燈（Cold Cathode Fluorescent Lamp，CCFL)作 _為照明裝置之發光元件，具體可參見Michael S. Shur等人 於文獻 Proceedings of the IEEE，Vol. 93, No· 10 (2005 年 10 月）中發表之 “ Solid-State Lighting: Toward Superior Illumination” 一文。 對於先前採用發光二極體作為發光元件之照明裝置， 其通常具有近似圓對稱之光場（如圖1所示），這些光場之中 心光強度較強’由中心向四周擴散之區域光強度越來越 弱’而實際中並不總是需要此類型之光場（即中心光強度最 強而四周之光強度逐漸變弱之光場）。例如，對於路燈而言， 由於通常之道路都是長條狀’故其希望可得到光強度分佈 較廣且光照均勻之光場以提高路燈所發出之光線之利用效 率，然而，對於光場為近似圓對稱之路燈而言，由於其輻 射fe圍不大’且其光場之光強度分佈不均勻，故採用該路 燈無法獲知較佳之光場形狀與光均勻度。 有鑑於此，有必要提供一種能夠調整照明光場形狀， 以提高光線利用效率與出光岣勻度之照明裝置。 7 201009254 【發明内容】 :一以下將以實施例說明一種能夠調整照明％場形狀，以 -提高光線利用效率與出光均勻度之照明裝置。 種照明裝置，其包括一個發光模組，一個第一光學 元件，一個第二光學元件以及一個第三光學元件。該發光 模組包括複數個陣列排布之固態發光元件。該第一光學元 件為-個反射式光學件，其與該複數個固態發光元件相 對叹置，用於反射該發光模組發出之部分光線。該第二光 學元件為一個透鏡陣列，其包括複數個透鏡單元，該第二 光學元件設置於該第一光學元件之與該發光模組相對之一 側，每個透鏡單元與一個固態發光元件相對應，該第二光 學元件用於透射、經過該第-光學元件反狀光線以及部分 由該發光模組直接發出之光線。該第三光學元件設置於該 第一光學7G件之與該第一光學元件相對之一侧，該第三光 學元件為一個具有微結構之透鏡。 • 相對於先前技術，該照明裝置之第一光學元件將該發 光模組發出之周圍之光線反射至該第二光學透鏡，該第二 光兀件能擴大該照明裝置之光學場形，並將光線透射至該 第三光學元件’該第三光學元件進一步將光線發散從而 擴大了該照明裝置之出光角度及出光均句度。藉由該第二 光學7L件之形狀與該第三光學元件之微結構之形狀之搭配 可有效之調整，以將發光模組產生之初始光場調整至一具 有預疋形狀之照明光場，從而得到較佳之光場形狀，提高 了光源之光利用效率以及出光均勻度。 8 201009254 【實施方式】 - 下面結合附圖對本發明作進一步之詳細說明。 二 請參見圖2與圖3,本發明第一實施例提供之照明裝置 '10，其包括一個發光模組11，一個第一光學元件12，一個 第二光學元件13以及一個第三光學元件14。 該發光模組11包括一個基板110與複數個設置於基板 110上之固態發光元件111。該固態發光元件111可為發光 二極體晶片或發光二極體。 ® 該第一光學元件12為一個反射式光學元件。該第一光 學元件12包括複數個陣列排布之中空圓台體121，該複數 個中空圓台體121之内侧壁122為反射面。每個中空圓台 體121對應一個固態發光元件111，其用於反射與之對應之 該固態發光元件111所發出之部分光線。 該第二光學元件13為一個透鏡陣列，其設置於該第一 光學元件12之與該發光模組11相對之一侧。該第二光學 參元件13包括複數個透鏡單元131，每個第二光學元件13 之透鏡單元131與一個固態發光元件111相對設置。 每個透鏡單元131包括一本體1311，該本體1311具有 一入光面1312，一與該入光面1312相對之出光面1313。 該入光面1312為一個向該本體1311内凹設延伸之凹曲 面。優選地，該凹曲面為沿γ方向延伸之柱狀凹曲面。該 出光面1313為一個向該本體1311外凸設之凸曲面。優選 地，該凸曲面為沿X方向延伸之柱狀凸曲面。 該第二光學元件13用於透射經過該第一光學元件12 9 201009254 反射之光線以及部分由該發光模組11直接發出之光線。 ‘ 可理解的是，該入光面1312及該出光面1313亦可分 .別為球面、錐形面或其他具有不同曲率之雙曲面，菲涅耳 '鋸齒面，非球面或自由形曲面。 該第三光學元件14為一個平板形之柱狀透鏡陣列，其 具有一個第一表面141以及一個與該第一表面141相對之 第二表面142。該第一表面141與該第二光學元件13相對 設置。該第二表面142上具有複數個微結構143,該複數個 ®微結構143為鋸齒狀凸起。該複數個微結構143能增加該 第三光學元件14之折射性能，有效之將經該第二光學元件 13透射後之光線經由該第三光學元件14折射後之光場放 大，以拓展該照明裝置10之輻射範圍。 該複數個固態發光元件111發出之光線經由該第一光 學元件12射出，其中，中央部分之光線直接入射至該第二 光學元件13，周圍部分之光線於中空圓台體121之内側壁 φ 122發生反射後射出，因此，該複數個固態發光元件111發 出之光線經過該第一光學元件12後進行第一次光場形狀調 整，使其光場縮小，從而光線強度集中，亮度高。 該第二光學元件13之入光面1312為柱狀凹曲面，以 使入射至該入光面1312之光線於X方向上產生輻射狀偏 轉，即由柱狀凹曲面之底部向該柱狀凹曲面較高之兩端偏 轉，從而使該複數個固態發光元件111發出之光線經由該 透鏡單元13折射後於X方向上之光場形狀放大。亦就是 說，該入光面1312拓展了該照明裝置10於X方向上之輻 201009254 射範圍。 ·*同時，該第二光學元件13之出光面1313為柱狀凸曲 :面’以使從其上出射之光線於該γ方向上由該柱狀凸曲面 ^兩端向其頂部產生會聚狀偏轉，從而使該複數個固態發 光几件111發出之光線經由該透鏡單元13折射後於γ方向 上之光場形狀減小。即，該出光面1313壓縮了該照明裝置 10於Y方向上之輻射範圍。 因此，該複數個固態發光元件m發出之光線經過該 第二光學元件後進行第二次光場形狀調整，於χ方向上 拓展了之輻射範圍’同時，於Y方向上壓縮了之輻射範圍。 經該第二光學元件13透射後之光線入射至該第三光學 讀14。該複數個微結構143能增加該第三光學元件η 二效Γ經該第二光學元件13透射後之光線 裝署Τη 折射後之光場放大，以拓展該照明 3裝署之t射範圍’經過該第三光學元件14透射後，該 照明光角度大於#於120度，且呈—非對稱形狀。 亦可S ’該複數個微結構143不限於鑛齒狀凸起， 狀，請參見圖4,該複數個微結構⑷為圓弧 乂起或圓柱狀條形凸起陣列排布。 请參見圖5,該複數個微結構i43為 凸起或菱柱狀凸起。 為尺寸不同之鑛齒狀 凸起請=Γ6,該複數個微結構143為交錯排布之鑛齒狀 起J柱狀凸起’圓弧形凸起，圓柱狀條形凸起。 明多見圖7’該複數個微結構143形成於該第三光學元 11 201009254 件14之該第一表面141與該第二表面142。該第一表面141 .上之複數個微結構143為圓弧形凸起，圓柱狀條形凸起， .該第二表面142上之複數個微結構143為鋸齒狀凸起，菱 •柱狀凸起。當然，形成於該第一表面141與該第二表面142 之複數個微結構143亦可為其他組合。 於本實施例中，於第三光學元件14之第一表面141上 之微結構143上形成一個抗反射層144,以防止光線於該複 數個微結構143上發生反射，進而可增加出光效率。 ® 請參見圖8，本發明第二實施例提供之照明裝置20， 本實施例與第一實施例結構基本相同，其包括：一個發光 模組21，一個第一光學元件22，一個第二光學元件23以 及一個第三光學元件24。 本實施例與第一實施例不同之處在於，該第三光學元 件24為一個曲面之透射式之透鏡陣列。該第三光學元件24 之第一表面241為平面，第二表面242為柱狀凸曲面。該 參第三光學元件24之第二表面242上具有複數個微結構 243。該微結構243呈鋸齒狀凸起，菱柱狀凸起。該微結構 243能增加該第三光學元件24之折射性能，有效之將經該 第二光學元件23透射後之光線經由該第三光學元件24折 射後之光場放大，以拓展該照明裝置20之輻射範圍。 可理解的是，該複數個微結構243不限於鋸齒狀凸起， 亦可為其他形狀，如菱柱狀凸起，圓弧形凸起，圓柱狀條 形凸起或者交錯排之鋸齒狀凸起，菱柱狀凸起，圓弧形凸 起，圓柱狀條形凸起。 12 201009254 當然，於本實施例中，該第三光學元件24之第一表面 .241不限於平面，亦可為曲面。當該第一表面241與該第二 .表面242均為曲面時，該第一表面241與該第二表面242 _於又方向與Y方向之曲率可相同，亦可不同。 請參見圖9,該複數個微結構243僅形成於與該第三光 學元件24之第一表面241。且於第三光學元件24之第一表 面241上之微結構243上形成一個抗反射層244,以防止光 線於該第三光學元件24之第一表面242上之複數個微結構 ® 243上發生反射，進而可增加出光效率。 可理解的是，該複數個微結構243亦可同時形成於與 該第三光學元件24之第一表面241與該第二表面242。 綜上所述，本發明確已符合發明專利之要件，遂依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案 技藝之人士援依本發明之精神所作之等效修飾或變化，皆 @應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1係一種擴散型光場形狀之效果圖。 圖2係本發明第一實施例光學透鏡之結構分解圖。 圖3係本發明第一實施例光學透鏡之剖面示意圖。 圖4係圖1中微結構為圓弧狀凸起之剖面示意圖。 圖5係圖1中微結構為尺寸不同之鋸齒狀凸起之剖面 示意圖。 圖6係圖1中微結構為鋸齒狀凸起與圓弧狀凸起之組 13 201009254 合之剖面示意圖。 . 圖7係圖1中微結構形成於第三光學元件兩側之剖面 .示意圖。 圖8係本發明第二實施例光學透鏡之剖面示意圖。 圖9係圖8中微結構形成於靠近第二光學元件之一側 之剖面示意圖。 【主要元件符號說明】201009254 IX. Description of the invention: [Technical field to which the invention pertains]: The present invention relates to a lighting device, and more particularly to a lighting device capable of adjusting the shape of an illumination-light field. [Prior Art] At present, the Light Emitting Diode (LED) is gradually replacing the Cold Cathode Fluorescent Lamp due to its excellent light quality (that is, the spectrum of the light source) and high luminous efficiency. CCFL) is a illuminating element for illuminating devices. For details, see Michael S. Shur et al., Proceedings of the IEEE, Vol. 93, No. 10 (October 2005). Solid-State Lighting: Toward Superior Illumination" article. For the illumination device that previously used the light-emitting diode as the light-emitting element, it usually has a light field of approximately circular symmetry (as shown in FIG. 1), and the light intensity of the center of these light fields is strong 'the light intensity of the region diffused from the center to the periphery. It is getting weaker and harder, and this type of light field is not always needed (ie, the light field with the strongest central light intensity and the surrounding light intensity is gradually weakened). For example, for street lamps, since the usual roads are long strips, it is desirable to obtain a light field with a wide distribution of light intensity and uniform illumination to improve the utilization efficiency of the light emitted by the street lamps. However, for the light field, In the case of a nearly circular symmetrical street lamp, since the radiation fe is not large and the light intensity distribution of the light field is not uniform, the light field shape and light uniformity cannot be known by using the street lamp. In view of the above, it is necessary to provide an illumination device capable of adjusting the shape of the illumination light field to improve the light utilization efficiency and the uniformity of the exit pupil. 7 201009254 SUMMARY OF THE INVENTION: Hereinafter, an illumination device capable of adjusting the illumination % field shape to improve light utilization efficiency and light emission uniformity will be described by way of embodiments. A lighting device comprising a lighting module, a first optical component, a second optical component and a third optical component. The illuminating module comprises a plurality of solid-state illuminating elements arranged in an array. The first optical component is a reflective optical component that is opposite to the plurality of solid state light emitting components for reflecting a portion of the light emitted by the light emitting module. The second optical component is a lens array, and includes a plurality of lens elements disposed on a side of the first optical component opposite to the light emitting module, each lens unit and a solid state light emitting component Correspondingly, the second optical component is used for transmitting, passing the ray of the first optical element and partially emitting light directly from the illuminating module. The third optical element is disposed on a side of the first optical 7G opposite to the first optical element, and the third optical element is a lens having a microstructure. • relative to the prior art, the first optical component of the illumination device reflects the ambient light emitted by the illumination module to the second optical lens, the second optical component can expand the optical field shape of the illumination device, and The light is transmitted to the third optical element. The third optical element further diverges the light to expand the light exit angle and the light output uniformity of the illumination device. The shape of the second optical 7L member and the shape of the microstructure of the third optical component can be effectively adjusted to adjust the initial light field generated by the light emitting module to an illumination light field having a pre-shaped shape. Thereby, a better light field shape is obtained, and the light utilization efficiency and the light uniformity of the light source are improved. 8 201009254 [Embodiment] - The present invention will be further described in detail below with reference to the accompanying drawings. Referring to FIG. 2 and FIG. 3, a lighting device '10 according to a first embodiment of the present invention includes a lighting module 11, a first optical component 12, a second optical component 13, and a third optical component 14. . The light emitting module 11 includes a substrate 110 and a plurality of solid state light emitting elements 111 disposed on the substrate 110. The solid state light emitting element 111 can be a light emitting diode chip or a light emitting diode. ® The first optical element 12 is a reflective optical element. The first optical component 12 includes a plurality of hollow circular disk bodies 121 arranged in an array, and the inner side walls 122 of the plurality of hollow circular disk bodies 121 are reflective surfaces. Each hollow circular body 121 corresponds to a solid state light emitting element 111 for reflecting a portion of the light emitted by the solid state light emitting element 111 corresponding thereto. The second optical component 13 is a lens array disposed on a side of the first optical component 12 opposite to the light emitting module 11. The second optical component 13 includes a plurality of lens units 131, and the lens unit 131 of each second optical element 13 is disposed opposite to a solid state light emitting element 111. Each of the lens units 131 includes a body 1311 having a light incident surface 1312 and a light emitting surface 1313 opposite to the light incident surface 1312. The light incident surface 1312 is a concave curved surface that is recessed into the body 1311. Preferably, the concave curved surface is a cylindrical concave curved surface extending in the γ direction. The light-emitting surface 1313 is a convex curved surface that protrudes outward from the body 1311. Preferably, the convex curved surface is a cylindrical convex curved surface extending in the X direction. The second optical component 13 is configured to transmit light reflected by the first optical component 12 9 201009254 and a portion of the light directly emitted by the light emitting module 11 . ‘ It is understood that the light-incident surface 1312 and the light-emitting surface 1313 can also be divided into spherical surfaces, tapered surfaces or other hyperboloids with different curvatures, Fresnel 'sawed surfaces, aspheric surfaces or free-form surfaces. The third optical element 14 is a flat cylindrical lens array having a first surface 141 and a second surface 142 opposite the first surface 141. The first surface 141 is disposed opposite the second optical element 13. The second surface 142 has a plurality of microstructures 143, and the plurality of microstructures 143 are serrated protrusions. The plurality of microstructures 143 can increase the refractive performance of the third optical element 14 and effectively amplify the light field transmitted through the second optical element 13 through the optical field refracted by the third optical element 14 to expand the illumination. The radiation range of device 10. The light emitted by the plurality of solid-state light-emitting elements 111 is emitted through the first optical element 12, wherein the central portion of the light is directly incident on the second optical element 13, and the light of the surrounding portion is on the inner side wall φ 122 of the hollow circular body 121. After the reflection occurs, the light emitted by the plurality of solid-state light-emitting elements 111 passes through the first optical element 12, and the light field shape is adjusted for the first time, so that the light field is reduced, and the light intensity is concentrated and the brightness is high. The light incident surface 1312 of the second optical element 13 is a columnar concave curved surface, so that the light incident on the light incident surface 1312 is radially deflected in the X direction, that is, from the bottom of the cylindrical concave curved surface to the cylindrical concave The higher ends of the curved surface are deflected so that the light emitted by the plurality of solid-state light-emitting elements 111 is refracted by the lens unit 13 and then magnified in the shape of the light field in the X direction. That is to say, the light incident surface 1312 expands the range of the 201009254 radiation of the illumination device 10 in the X direction. * At the same time, the light-emitting surface 1313 of the second optical element 13 is a columnar convex curved surface: a surface 'to cause the light emitted therefrom to converge in the γ direction from the both ends of the cylindrical convex curved surface to the top thereof The light is deflected such that the light emitted by the plurality of solid-state light-emitting elements 111 is refracted by the lens unit 13 and the shape of the light field in the γ direction is reduced. That is, the light-emitting surface 1313 compresses the radiation range of the illumination device 10 in the Y direction. Therefore, the light emitted from the plurality of solid-state light-emitting elements m passes through the second optical element to perform a second optical field shape adjustment, and the radiation range is expanded in the x-direction while the radiation range is compressed in the Y-direction. Light transmitted through the second optical element 13 is incident on the third optical read 14. The plurality of microstructures 143 can increase the optical field amplification of the third optical element η after being transmitted by the second optical element 13 to expand the range of the illumination of the illumination 3 After being transmitted through the third optical element 14, the illumination light angle is greater than #120 degrees and is in an asymmetrical shape. Alternatively, the plurality of microstructures 143 are not limited to the orthodontic protrusions. Referring to FIG. 4, the plurality of microstructures (4) are arranged in a circular arc or a cylindrical strip-shaped convex array. Referring to Figure 5, the plurality of microstructures i43 are raised or prismatic protrusions. For the different sizes of the ore-shaped protrusions, please = Γ6, the plurality of microstructures 143 are staggered arrangements of the ore-like teeth, J-pillar-like protrusions, arc-shaped protrusions, and cylindrical strip-shaped protrusions. The plurality of microstructures 143 are formed on the first surface 141 and the second surface 142 of the third optical element 11 201009254. The plurality of microstructures 143 on the first surface 141 are arc-shaped protrusions, cylindrical strip-shaped protrusions, and the plurality of microstructures 143 on the second surface 142 are serrated protrusions, and the columnar shape Raised. Of course, the plurality of microstructures 143 formed on the first surface 141 and the second surface 142 may also be other combinations. In the present embodiment, an anti-reflection layer 144 is formed on the microstructure 143 on the first surface 141 of the third optical element 14 to prevent light from being reflected on the plurality of microstructures 143, thereby increasing light extraction efficiency. Referring to FIG. 8, a lighting device 20 according to a second embodiment of the present invention is substantially the same as the first embodiment, and includes: a light emitting module 21, a first optical component 22, and a second optical component. Element 23 and a third optical element 24. This embodiment differs from the first embodiment in that the third optical element 24 is a curved transmissive lens array. The first surface 241 of the third optical element 24 is a flat surface, and the second surface 242 is a columnar convex curved surface. The second surface 242 of the third optical element 24 has a plurality of microstructures 243 thereon. The microstructure 243 has a serrated protrusion and a rhombic protrusion. The microstructure 243 can increase the refractive performance of the third optical element 24, and effectively amplify the light field transmitted through the second optical element 23 through the optical field refracted by the third optical element 24 to expand the illumination device 20. Radiation range. It can be understood that the plurality of microstructures 243 are not limited to the zigzag protrusions, and may be other shapes, such as a rhombic protrusion, a circular protrusion, a cylindrical strip protrusion or a zigzag arrangement of staggered rows. Up, rhombic protrusion, arc-shaped protrusion, cylindrical strip-shaped protrusion. 12 201009254 Of course, in this embodiment, the first surface .241 of the third optical component 24 is not limited to a plane, and may also be a curved surface. When the first surface 241 and the second surface 242 are both curved surfaces, the first surface 241 and the second surface 242 may have the same curvature or different curvatures in the Y direction. Referring to FIG. 9, the plurality of microstructures 243 are formed only on the first surface 241 of the third optical component 24. An anti-reflective layer 244 is formed on the microstructure 243 on the first surface 241 of the third optical element 24 to prevent light from occurring on the plurality of microstructures 243 on the first surface 242 of the third optical element 24. Reflection, which in turn increases light extraction efficiency. It can be understood that the plurality of microstructures 243 can be simultaneously formed on the first surface 241 and the second surface 242 of the third optical component 24. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. [Simple description of the drawing] Fig. 1 is an effect diagram of a diffused light field shape. Fig. 2 is an exploded perspective view showing the optical lens of the first embodiment of the present invention. Fig. 3 is a schematic cross-sectional view showing an optical lens according to a first embodiment of the present invention. 4 is a schematic cross-sectional view showing the microstructure of FIG. 1 as an arc-shaped protrusion. Fig. 5 is a schematic cross-sectional view showing the microstructure of Fig. 1 with zigzag protrusions of different sizes. FIG. 6 is a cross-sectional view showing the microstructure of FIG. 1 in a group of zigzag protrusions and arcuate protrusions 13 201009254. Figure 7 is a cross-sectional view showing the microstructure of Figure 1 formed on both sides of the third optical element. Figure 8 is a cross-sectional view showing an optical lens according to a second embodiment of the present invention. Figure 9 is a schematic cross-sectional view showing the microstructure of Figure 8 formed on one side of the second optical element. [Main component symbol description]
照明裝置 10、20 發光模組 11、21 第一光學元件 12 ' 22 第二光學元件 13 ' 23 第三光學元件 14 > 24 基板 110 發光元件 111 中空圓台體 121 内側壁 122 透鏡單元 131 本體 1311 入光面 1312 出光面 1313 第一表面 141 、 241 第二表面 142、 242 微結構 143 、 243 反射層 144 、 244 14Illumination device 10, 20 illumination module 11, 21 first optical element 12' 22 second optical element 13' 23 third optical element 14 > 24 substrate 110 light-emitting element 111 hollow circular body 121 inner side wall 122 lens unit 131 body 1311 light incident surface 1312 light emitting surface 1313 first surface 141, 241 second surface 142, 242 microstructure 143, 243 reflective layer 144, 244 14