1360628 100年11月24日梭正替运頁 六、發明說明： 【發明所屬之技術領域】 v [0001] 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】 [0002] 目前，發光二極體（Light Emi tt ing 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 逐漸取代冷陰極勞光燈（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. 1 0 (2005年 10 月）中發表之“ Solid-State Lighting： Toward Superior Illuminati on" 一文。 [0003] 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t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，由於其輻射範圍不大，且其光場之光強度分佈不均 勻，故採用該路燈無法獲得較佳之光場形狀與光均勻度 [0004] 097133111 有鑑於此，有必要提供一種能夠調整照明光場形狀 表單编號A0101 第4頁/共20頁 以 1003436472-0 1360,628 100年11月日核正_|頁 提高光線利用效率與出光均勻度之照明裝置。 [0005] 【發明内容】 以下將以實施例說明一種能夠調整照明光場形狀，以提 高光線利用效率與出光均勻度之照明裝置。 [0006] 〆種照明裝置，其包括一個發光模組，一個第一光學元 仲，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 元件為一個反射式光學元件’其與該複數個固態發光元 件相對設置，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一光學元件反射 之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二光學元件之與該第一光學元件相 對之一側，該第三光學元件為一個具有微結構之透鏡。 φ [0007] 相對於先前技術，該照明裝置冬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 光元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勻度。藉由. 該第二光學元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 調整至一具有預定形狀之照明光場，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。 097133111 表單编號Α0101 第5頁/共20頁 1003436472-0 1360628 _ 100年11月24日修正替换’頁 【實施方式】 [0008] 下面結合附圖對本發明作進一步之詳細說明。 [0009] 請參見圖2與圖3，本發明第一實施例提供之照明裝置1〇 ，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。 [〇〇1〇] 該發光模組11包括一個基板110與複數個設置於基板no 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。 [0011]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12ι，該複數個 中空圓台體121之内側壁122為反射面。每個中空圓台體 121對應一個固態發光元件ill，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。 [0012] 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相對之一側。該第二光學元 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hi相對設置。 [0013] 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外凸設之晶曲面。優選地， 該凸曲面為沿X方向延伸之柱狀凸曲面。 [0014]該第二光學元件13用於透射經過該第一光學元件12反射 1003436472-0 097133111 表單編號A0101 第6頁/共20頁1360628 On November 24, 100, the shuttle is replacing the page. VI. Description of the Invention: [Technical Field of the Invention] v [0001] 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] [0002] At present, a light-emitting diode (LED) is gradually replacing a cold cathode light lamp because of its good light quality (that is, the spectrum of the light source) and high luminous efficiency ( Cold Cathode Fluorescent Lamp (CCFL) is used as a illuminating element for illumination devices. For details, see Michael S. Shur et al., Proceedings of the IEEE, Vol. 93, No. 10 (October 2005). State Lighting: Toward Superior Illuminati on" [0003] For illumination devices that previously used light-emitting diodes as light-emitting elements, they typically have a light field that is approximately circularly symmetric (as shown in Figure 1), and the center of these light fields Strong intensity 'The intensity of light diffused from the center of t to the surrounding area is getting weaker and weaker. In practice, this type of light field is not always needed (that is, the light field with the strongest central light intensity and the surrounding light intensity is gradually weakened) For example, for street lamps, since the roads are usually long, it is desirable to obtain a light field with a wide distribution of light intensity and uniform illumination to improve the use of light emitted by the street lamps. Rate, however, for a street lamp whose light field is approximately circularly symmetrical, since the radiation range is not large and the light intensity distribution of the light field is not uniform, the light field shape and light uniformity cannot be obtained by using the street lamp [ 0004] 097133111 In view of this, it is necessary to provide an ability to adjust the illumination light field shape form number A0101 page 4 / total 20 pages to 1003436472-0 1360, 628 100 November nuclear correction _ | page to improve light utilization efficiency and Illumination device with uniformity of light emission. [0005] Hereinafter, an illumination device capable of adjusting the shape of an illumination light field to improve light utilization efficiency and uniformity of light emission will be described by way of example. The invention comprises a light emitting module, a first optical element, a second optical component and a third optical component. The light emitting module comprises a plurality of arrayed solid state light emitting elements, wherein the first optical component is a reflective optical An element is disposed opposite to the plurality of solid state light emitting elements for reflecting a portion of the light emitted by the light emitting module. The second optical component is a The lens array includes a plurality of lens units disposed on a side of the first optical element opposite to the light emitting module. Each lens unit corresponds to a solid state light emitting element. The second optical element For transmitting light reflected by the first optical element and partially emitting light directly from the light emitting module. The third optical element is disposed on a side of the second optical element opposite to the first optical element, the first The three optical element is a lens having a microstructure. [0007] Compared with the prior art, the first optical element of the illumination device reflects the light emitted by the illumination module to the second optical lens, and the second optical element can expand the optical field shape of the illumination device. And transmitting light to the third optical component, the third optical component further diverging the light, thereby expanding the light exiting angle and the light uniformity of the illumination device. By adjusting the shape of the second optical component and the shape of the microstructure of the third optical component, the initial light field generated by the light emitting module is adjusted to an illumination light field having a predetermined shape, thereby A better light field shape is obtained, and the light utilization efficiency of the light source is improved to "and light uniformity. 097133111 Form No. Α0101 Page 5 of 20 1003436472-0 1360628 _November 24, 2014 Correction Replacement Page [Embodiment] [0008] The present invention will be further described in detail below with reference to the accompanying drawings. 2 and FIG. 3, a lighting device 1 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 device. Element 14. [〇〇1〇] The light-emitting module 11 includes a substrate 110 and a plurality of solid-state light-emitting elements 111 disposed on the substrate no. The solid state light emitting element 111 can be a light emitting diode chip or a light emitting diode. [0011] The first optical element 12 is a reflective optical element. The first optical component 12 includes a plurality of arrays of hollow circular disk bodies 12i, 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 ill for reflecting a portion of the light emitted by the solid state light emitting element 111 corresponding thereto. [0012] 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 element 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 hi. Each lens unit 131 includes a body 1311 having a light incident surface 1312' and a light exit surface 1313 opposite to the light incident surface 1312. The light incident surface 1312 is a concave curved surface extending into the body 1311. Preferably, the concave curved surface is a cylindrical concave curved surface extending in the γ direction. The light exit surface 1313 is a crystal 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. [0014] The second optical element 13 is used for transmission through the first optical element 12 to reflect 1003436472-0 097133111 Form No. A0101 Page 6 of 20
1360628 I 100年.11月24日修正替换頁 之光線以及部分由該發光模組11直接發出之光線。 [0015] 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。 [0016] 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先件1'4折射後之光場 放大，以拓展該照明裝置10之輻射範圍。 [0017] 該複數値固態發光元件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 122發生反射後射出，因此，該複數値固態發光元件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。 [0018] 該第二光學元件13之入光面1312為枉狀凹曲面，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方向上之輻射範圍。 097133111 表單編號A0101 第7·頁/共20頁 1003436472-0 1360628 100年11月24日核正替换;頁 [0019] 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Y方向上由該柱狀凸曲面之兩 端向其頂部產生會聚狀偏轉，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Y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。 [0020] 因此，該複數個固態發光元件111發出之光線經過該第二 光學元件13後進行第二次光場形狀調整，於X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。 φ [0021] 經該第二光學元件13透射後之光線入射至該第三光學元 件14。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，經過該第三光學元件14透射後，該 照明裝置之出光角度大於等於120度，且呈一非對稱形狀 〇 [0022] 可理解的是，該複數個微結構143不限於鋸齒狀凸起，亦 可為其他形狀，請參見圖4，該複數個微結構143為圓弧 形凸起或圓柱狀條形凸起陣列排布。 [0023] 請參見圖5，該複數個微結構143為尺寸不同之鋸齒狀凸 起或菱柱狀凸起。 [0024] 請參見圖6，該複數個微結構143為交錯排布之鋸齒狀凸 起，菱柱狀凸起，圓弧形凸起，圓柱狀條形凸起。 [0025] 請參見圖7，該複數個微結構143形成於該第三光學元件 097133111 表單编號A0101 第8頁/共20頁 1003436472-0 1360628 » I 100年.11月24日按正替換頁 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a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。 [0026] 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。 • [0027] 請參見圖8，本發明第二實施例提供之照明裝置2〇，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。 [0028] 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2 4 之第一表面241為平面，第二表面242為柱狀凸曲面。該 • 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呈鑛齒狀凸起，菱柱狀凸起。該微結構 2 4 3能增加該第三光學元件2 4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。 [0029] 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ώ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。 097133111 表單編號A0101 第9頁/共20頁 1003436472-0 1360628 [0030] [0031] [0032] [0033] [0034] [0035] [0036] [0037] [0038] 100年11月24日核正雜頁 當然，於本實施例_，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X 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。1360628 I 100 years. On November 24th, the light of the replacement page and some of the light directly emitted by the light-emitting module 11 are corrected. [0015] It can be understood that the light-incident surface 1312 and the light-emitting surface 1313 can also be a spherical surface, a tapered surface or other hyperboloids having different curvatures, a Fresnel sawtooth surface, an aspheric surface or a free-form curved surface. [0016] 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 which are serrated protrusions. The plurality of microstructures 143 can increase the refractive performance of the third optical component 14 and effectively amplify the light transmitted through the second optical component 13 through the optical field refracted by the third optical component 1'4. The radiation range of the illumination device 10 is expanded. [0017] 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 surrounding portion of the light is incident on the hollow circular body 121. The inner side wall 122 is reflected and then emitted. Therefore, the light emitted by the plurality of solid-state light-emitting elements 111 passes through the first optical element 12, and the first light field shape is adjusted to reduce the light field, thereby concentrating the light intensity. High Brightness. [0018] The light incident surface 1312 of the second optical element 13 is a 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 The higher ends of the columnar concave curved surface are deflected, so that the light emitted from the plurality of solid-state light-emitting elements 111 is refracted by the lens unit 13 and then magnified in the X-direction light field shape. That is to say, the light incident surface 1312 expands the radiation range of the illumination device 10 in the X direction. 097133111 Form No. A0101 Page 7 of 20 pages 1003436472-0 1360628 November 24th, 100th, nuclear replacement; page [0019] At the same time, the light-emitting surface 1313 of the second optical element 13 is a columnar convex curved surface, so that The light emitted therefrom is deflected by the both ends of the columnar convex curved surface toward the top thereof in the Y direction, so that the light emitted by the plurality of solid state light emitting elements 111 is refracted by the lens unit 13 in the Y direction. The shape of the light field on the surface is reduced. That is, the light-emitting surface 1313 compresses the radiation range of the illumination device 10 in the Y direction. [0020] Therefore, the light emitted by the plurality of solid-state light-emitting elements 111 passes through the second optical element 13 to perform a second optical field shape adjustment, and the radiation range is expanded in the X direction, and is compressed in the Y direction. Radiation range. φ [0021] Light transmitted through the second optical element 13 is incident on the third optical element 14. 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 the device 10, after being transmitted through the third optical element 14, the light-emitting angle of the illumination device is greater than or equal to 120 degrees, and has an asymmetric shape. [0022] It is understood that the plurality of microstructures 143 are not limited. The zigzag protrusions may also have other shapes. Referring to FIG. 4, the plurality of microstructures 143 are arranged in a circular arc-shaped convex or cylindrical strip-shaped convex array. Referring to FIG. 5, the plurality of microstructures 143 are zigzag protrusions or rhombic protrusions of different sizes. [0024] Referring to FIG. 6, the plurality of microstructures 143 are zigzag protrusions of staggered arrangement, rhomboid protrusions, arcuate protrusions, and cylindrical strip protrusions. [0025] Referring to FIG. 7, the plurality of microstructures 143 are formed on the third optical element 097133111. Form No. A0101 Page 8 / Total 20 pages 1003436472-0 1360628 » I 100 years. November 24th, according to the replacement page The first surface 141 and the second surface 142 of 14. The plurality of microstructures 143 on the first surface 141 are arcuate protrusions, and the columnar strips are convex. The plurality of microstructures 143 on the second surface 142 are serrated protrusions, and the prisms are a. Of course, the plurality of microstructures 143 formed on the first surface 141 and the second surface 142 may 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. Light extraction efficiency. [0027] Referring to FIG. 8, a lighting device 2 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, A second optical element 23 and a third optical element 24. [0028] This embodiment is different 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 mineral-toothed protrusion and a rhombic protrusion. The microstructure 2 4 3 can increase the refractive performance of the third optical element 24, and effectively enlarge the light field after the light transmitted through the second optical element 23 is refracted by the third optical element 24 to expand the The radiation range of the illumination device 20. [0029] 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 arc protrusion, a cylindrical strip shape or a staggered arrangement. Zigzag protrusions, rhombic protrusions, arc-shaped protrusions 'cylindrical strip-shaped protrusions. 097133111 Form No. A0101 Page 9 / Total 20 Page 1003436472-0 1360628 [0031] [0033] [0034] [0037] [0038] [0038] November 24, 100 nuclear correction Of course, in the present embodiment, the first surface 241 of the third optical element 24 is not limited to a plane, and may be a curved surface. When the first surface 241 and the second surface 242 are both curved surfaces, the curvature of the first surface 241 and the second surface 242 in the X direction and the Y direction may be the same or different. 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 being reflected on the plurality of microstructures 243 on the first surface 242 of the third optical element 24. In turn, the light extraction efficiency can be increased. 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.
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》 I 【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錄齒狀凸起之剖面示意 圖，。 097133111 表單编號A0101 1003436472-0 1360628 100年.11月24日按正替換頁 [0039] 圖6係圖1中微結構為鋸齒狀凸起與圓弧狀凸起之組合之 剖面示意圖。 [0040] 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。 [0041] 圖8係本發明第二實施例光學透鏡之剖面示意圖。 . [0042] 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。 鲁[0043] 【主要元件符號說明】 照明裝置：10、20 [0044] 發光模組：11、21 [0045] 第一光學元件：12、22 [0046] 第二光學元件：13、23 [0047] 第三光學元件：14、24 [0048] • [0049] 基板：110 發光元件：111 [0050] 中空圓台體：121 [0051] 内側壁：122 [0052] 透鏡單元：131 [0053] 本體：1311 [0054] 入光面：131 2 出光面：1313 表單編號A0101 [0055] 097133111 第11頁/共20頁 1003436472-0 1360628 100年11月24日核正替換•頁 [0056] 第一表面：141、241 [0057] 第二表面：142、242 [0058] 微結構：143、243 [0059] 反射層：144、244 1003436472-0 097133111 表單编號A0101 第12頁/共20頁In summary, the present invention has indeed met the requirements of the invention patent and has filed a patent application in accordance with the 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 those skilled in the art in light of the spirit of the present invention are intended to be included in the scope of the following claims. I [Simple Description of the Drawings] Figure 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 different sizes of recorded toothed projections. 097133111 Form No. A0101 1003436472-0 1360628 100. November 24th Pressing Positive Replacement Page [0039] FIG. 6 is a schematic cross-sectional view showing the microstructure of FIG. 1 in combination with a serrated protrusion and an arcuate protrusion. 7 is a schematic cross-sectional view showing the microstructures of FIG. 1 formed on both sides of a third optical element. 8 is a schematic cross-sectional view showing an optical lens according to a second embodiment of the present invention. [0042] FIG. 9 is a cross-sectional view showing the microstructure of FIG. 8 formed on a side close to the second optical element. Lu [0043] [Main component symbol description] Lighting device: 10, 20 [0044] Light-emitting module: 11, 21 [0045] First optical component: 12, 22 [0046] Second optical component: 13, 23 [0047 Third Optical Element: 14, 24 [0048] [0049] Substrate: 110 Light-emitting element: 111 [0050] Hollow circular body: 121 [0051] Inner side wall: 122 [0052] Lens unit: 131 [0053] Body :1311 [0054] Light-in surface: 131 2 Light-emitting surface: 1313 Form number A0101 [0055] 097133111 Page 11 of 20 1003436472-0 1360628 November 24, 100 nuclear replacement • Page [0056] First surface : 141, 241 [0057] Second surface: 142, 242 [0058] Microstructure: 143, 243 [0059] Reflective layer: 144, 244 1003436472-0 097133111 Form number A0101 Page 12 of 20