M392366 五、新型說明： 【新型所屬之技術領域】 本創作係關於鏡頭結構，尤指一種將光圈與紅外光截止滅光層 設置於鏡片上之鏡頭結構。 〜 9 【先前技術】 影像擷取裝置中的鏡頭結構通常由具有不同光學特性(如：曲 率或焦距等)之多片鏡片（正透鏡或負透鏡)所組成，其目的在透過多 片鏡片間的鮮傳輸機制，藉此單—鏡片可能具有的光學偏差 (如：像差及色差）。一般來說，鏡頭結構通常包含有必要的光圈元 件與紅外光截止渡'光;i。請參考第丨圖，其係為習知鏡頭結構的内 部示意圖。如圖所示，鏡頭結構100包含有第一鏡片11〇、第二鏡 片120、第三鏡片130、光圈元件140與紅外光截止濾光片15〇。 光圈元件140主要的用途在於鏡頭結構中控制入射光線進入影像擷 取裝置之光量多寡。紅外光截止濾光片150通常是為了解決電子式 的感光元件(CMOS或CCD)通常對於光線中的紅外光成分較為敏 感的問題，加入紅外光截止濾光片150，可避免電子式感光元件因 對紅外光成份感受度較強而造成成像品質的偏差。然而，光圈元件 140與紅外光截止濾光片150通常具有一定的厚度，且隨著鏡頭結 構製程上的微縮，會使光圈元件的孔徑較容易產生製程上的偏差， 3 M392366 故對光線的傳輸來說，這元件麟崎理想，可能會額外造成無法 避免的光學偏差。 【新型内容】 本創作的特徵在於將光圈與紅外光截止濾光層整合於鏡片上， 如此來’除了可以減少習知光圈元件與紅外絲止遽光層的設置 可此對鏡頭結構帶來的額外光學偏差，亦可降低鏡頭結構的生產成 本。 本創作之一實施例提供一種鏡頭結構，該鏡頭結構包含：一第 -鏡片與一鏡片組。該第一鏡片之一第一面為一凸面並且朝向一物 方’以及其—第二面為—平面，其中該第__鏡片具有—光圈。該鏡 片組包合有至少—鏡片。其中，該第__鏡片與該鏡片組係沿著一光 軸而從該物方至一成像方依序排列。 較佳者，該鏡片組包含有：一第二鏡片與一第三鏡片。該第二 鏡片係為-正透鏡並且包含—凹面與至少—非球面，其中該凹面朝 向。亥物方。該第三鏡片係為一負透鏡並且包含至少一非球面，其中 該第二鏡片係介於該第—鏡片與該第三鏡片。 較佳者，該第一鏡片與該第二鏡片之焦距為正值，以及該第三 鏡片之焦距為負值。 M392366 較佳者’該第一鏡片之該第二面上設置有包含一巧透光孔隙之 一不透光層’而該可透光孔隙與該不透光層係形成該光圈’其中該 不透光曾係為—金屬薄膜層(metal film)。 較佳者’其中該第一鏡片、該第二鏡片、該第三鏡片係由平板 玻璃與光學膠所組成。 較佳者’該第一鏡片之該平板玻璃的該第一面上設置有一紅外 光截止濾光層(IR-CUT film)。 較佳者’該第一鏡片中之該平板玻璃的一第二面上設置有包含 一可透光孔隙之一不透光層，而該可透光孔隙與該不透光層形成該 光圈，該平板玻璃的該第二面係位於該平板玻璃與光學膠之間。 較佳者’其中該鏡頭結構之一整體焦距F〇，與該第一鏡片之 焦距F1之間，具有以下關係：1<F0/F1<1.3。 較佳者’該第二鏡片之焦距F2與該第三鏡片之焦距F3之間， 具有以下關係：1<|F2/F3卜2。 【實施方式】 請參考第2圖，其係為本創作第一實施例的示意圖。如圖所 5 M392366 不，鏡頭結構200包含有一第一鏡片21〇以及一鏡片組215。鏡片 組215中又包含有一第二鏡片220與一第三鏡片230。再者，第一 鏡片210與鏡片組215係沿著一光軸l而從物方〇Bj至成像方 IMG依序排列。第-鏡片21G之第—面八為—凸面，並且朝向物 方OBJ，以及其第二面B係為一平面，其中第二面B之表面設置 有一光圈APT。其中光圈APT係由第一鏡片之第二面B上之一可 透光孔隙H0L與一不透光層MET所組成。 進步來5兒’光圈APT的製造流程如下。首先’在第一鏡片 210上的平面(於本實施例中，第二面b為平面，然而，本創作並 未限制將光圈APT設置於鏡片中的哪一面，僅需為平面即可）鍍 上一層金屬薄膜(metal film)，以形成不透光層MET。接著，可透 過半導體微影製程在金屬薄膜層上生成可透光孔隙H〇L，以作為 光圈APT的孔徑。因此，光圈APT的製程流程特別適合應用於採 用晶圓級鏡片（wafer-level lens)之鏡頭結構的製程中，亦即，對這 種晶圓級鏡頭結構來說，本創作的不但可以提升鏡片結構的性能， 減少光學上的不理想性(如：像差與色差），還可大幅減少鏡頭結構 的成本與複雜度，可謂一舉數得。 於本實施例中，第二鏡片220係為一正透鏡，其第一面〇為一 凹面’並且朝向物方OBJ。再者，第二鏡片220包含有至少一非球 面，而於本實施例中，以第二鏡片220之第一面c為該非球面， 而其第二面D則為球面。然而，於本創作其他實施例中，第二鏡 M392366 片之第二面亦可能為非球面。再者，第三鏡片23〇則係為一負透 鏡’並且亦包含至少-非球面。本實施例中之第二鏡片與第三 鏡片130均由平板玻璃與光學膠所組成，如圖所示，第二鏡片22〇 包含平板玻璃222，以及由光學膠所構成之曲面部份，如其第一面 c與第二面〇皆為光學膠所構成。第三鏡片23〇則包含有平板玻 璃232以及由光學膠所構成之曲面部份，如其第一面£與第二面 F 〇 孀^ 於本創作之一第一實施例中，另提供一種將紅外光截止滤光層 (IR-CUT film)麟鏡片上的實施概念。請參考第3圖。如圖所示， 第3圖之鏡頭結構300包含有一第一鏡片31〇與一鏡片組315。鏡 片組315包含-第二鏡片320與一第三鏡片33〇。再者，鏡頭結構 300另包含有一平板玻璃340。 鏡頭結構300中之鏡片共包含有5個非球面，分別為第一鏡片 φ 310之曲面部分311，第二鏡片320之曲面部分321與323，以及 第二鏡片之曲面部份331與333，其中這些非球面之曲面部分均由 光學膠所構成。此外，除了由光學膠所構成的曲面部分外，第一鏡 片310尚包含一平板玻璃312，第二鏡片320尚包含一平板玻璃 322 ’以及第三鏡片尚包含一平板玻璃332，換言之，於本實施例 中，第一、第一與第二鏡片310、320與330均由平板玻璃與光學 膠所構成。然而，此非本創作之唯一限制，於本創作中之其它實施 例中’亦包含有藉由其它可能方式所形成的鏡片。 7 M392366 此外’第-鏡片310之第-面a’係為非球面之曲面部份3ιι所 形成，並且為面向物方⑽之—凸面’而在第—鏡片31〇之第二 面B上則鍍有-層紅外線截止滤光層IR。第二鏡片為—正透 鏡，且包含有均為非球面之凹面(第一面c，)與凸面(第二面D，）。第 三鏡片330為-負透鏡，並且包含均為非球面之第一面E，與第二 面F’。其中，第一鏡片310之焦距F1為正值，第二鏡片32〇之焦 距F2為正值，而第三鏡片33〇之焦距F3為負值。再者，焦距m 與F3之數值關係為1<|F2/F3|<2，而第-鏡片31〇之焦距F1與鏡 頭結構300之一整體焦距f〇的數值關係則為1<F〇/pi<1 3。第一 鏡片310、第二鏡片320與第三鏡片330與平板玻璃34〇的折射率 係介於1.5與1.6之間。由上述的實施例可知，本創作透過將一紅 外光截止濾光層鍍於一鏡片上，藉以簡化習知鏡頭結構的製程。 接著，以下將更一進步說明將於單一鏡片上同時結合有紅外光 截止濾光層與光圈結構的鏡片的鏡頭結構。請參考第4圖，其係為 本創作的第三實施例。如圖所示，鏡頭結構4〇〇包含有一第一鏡片 410與一鏡片組415。鏡片組415包含一第二鏡片420與一第三鏡 片430。再者，鏡頭結構4〇〇包含有一平板玻璃44〇。鏡頭結構 400中之鏡片共包含有5個非球面，分別為第一鏡片41〇之曲面部 分411 ’第二鏡片420之曲面部分421與423，以及第三鏡片之曲 面部份431與433，其中這些非球面之曲面部分均由光學膠所構 成。此外，除了由光學膠所構成的曲面部分外，第一鏡片41〇包含 M392366 有—平板玻璃4i2，第二鏡4 420包含有一平板玻璃似，與第三 •鏡片包含有一平板玻璃432，換言之，本實施例中，第-、第二與 第三鏡片4H)、420與430均由平板破填與光學膠所構成。然而， 此非本創作之唯_關’於本_巾之其它實_巾，亦包含有藉 由其它可能方式所形成的鏡片。 • 帛一鏡片中的平板玻璃412的-第二面η(亦為第一鏡片 410的第一面β )上鍵有一層紅外線遽光層，而平板玻璃412的 一第一面K介於平板玻璃412與光學膠所形成的曲面部份41丨之間) 上則鍍有具有-可透光⑽H〇L之顿光層MET，其+可透光孔 隙HOL與不透光層met形成鏡頭結構4〇〇的光圈Αρτ。本實施 例與上述實施例的差別在於，第一鏡片彻上除了具有光圈猜 外’亦具有紅外光截止濾光層IR。 此外，第一鏡片410之第一面A”係為非球面之曲面部份411所 •形成’且為面向物方⑽之一凸面。第二鏡片42〇為一正透鏡， 且包含有均為非球面之凹面(第一面c”)與凸面（第二面D”）。第三 鏡片430為一負透鏡，並且包含均為非球面之第一面E”與第二面 F。其中’第-鏡片410之焦距F1’為正值，第二鏡片42〇之焦距 F2’為正值，而第三鏡片43〇之焦距F3’為負值其中焦距F2，與 F3之數值關係為沖之’肝口，而第一鏡片彻之焦距ρι，與鏡頭 結構400之一整體焦距F0，的數值關係則為3。再者， 第一鏡片410、第二鏡片420與第三鏡片43〇與平板玻璃44〇的折 9 射率係介於U與i.6之間。由上㈣财知，梢作透過同 時將紅外賴讀、光層與棚設置第—鏡片41()上藉此簡化習知 鏡頭結構的製程。 由於本創作的概念將光圈與紅外光截止濾光層設置於鏡頭結構 中之鏡片上’可有效地縮小鏡賴構的體積，以因應目前電子產品 之尺寸微縮化的誠，再者，本創猶過這種整合的对，亦可減 少鏡頭結構的光學偏差問題，增進成像品質。 以上所述僅為本創作之較佳實施例，凡依本創作申請專利範圍 所做之均等變化與修飾，皆應屬本創作之涵蓋範圍。 【圖式簡單說明】 第1圖係為習知鏡頭結構的内部示意圖。 第2圖係為本創作第一實施例之鏡頭結構的内部示意圖。 第3圖係為本創作第二實施例之鏡頭結構的内部示意圖。 第4圖係為本創作第三實施例之鏡頭結構的内部示意圖。 【主要元件符號說明】 100、200、300、400 鏡頭結構 110〜130、210〜230、310〜330、鏡片 M392366 410〜430 140 光圈 150 紅外光截止濾光片 215 ' 315 > 415 鏡片組 222、232、312、322、332、 平板玻璃 340、412、422、432、440 311 ' 321 ' 323 ' 331 ' 333 > 曲面部份 411、421、423、43 卜 433M392366 V. New description: [New technical field] This creation is about lens structure, especially a lens structure in which the aperture and infrared light-off light-off layer are placed on the lens. ~ 9 [Prior Art] The lens structure in the image capturing device is usually composed of a plurality of lenses (positive lens or negative lens) having different optical characteristics (such as curvature or focal length), and the purpose is to pass through a plurality of lenses. The fresh transfer mechanism whereby the single-lens may have optical deviations (eg, aberrations and chromatic aberrations). In general, the lens structure usually contains the necessary aperture elements and infrared light to cut off the 'light'; Please refer to the figure, which is an internal schematic of a conventional lens structure. As shown, the lens structure 100 includes a first lens 11A, a second lens 120, a third lens 130, a diaphragm element 140, and an infrared light cut filter 15A. The primary purpose of the aperture element 140 is to control the amount of light incident into the image capture device in the lens structure. The infrared light cut filter 150 is generally used to solve the problem that the electronic photosensitive element (CMOS or CCD) is generally sensitive to infrared light components in the light, and the infrared light cut filter 150 is added to avoid the electronic photosensitive element The sensitivity to infrared light components is strong and the imaging quality is deviated. However, the aperture element 140 and the infrared cut filter 150 generally have a certain thickness, and as the lens structure is reduced in size, the aperture of the aperture element is more likely to cause deviation in the process, 3 M392366, thus transmitting light. In fact, this component is ideal for Linqi, which may cause additional inevitable optical deviations. [New content] The feature of this creation is that the aperture and the infrared light-cutting filter layer are integrated on the lens, so that the lens structure can be reduced by reducing the arrangement of the conventional aperture element and the infrared wire stop layer. Additional optical deviation can also reduce the production cost of the lens structure. One embodiment of the present invention provides a lens structure comprising: a first lens and a lens group. One of the first faces of the first lens is a convex surface and faces an object side and its second surface is a plane, wherein the first lens has an aperture. The lens assembly includes at least a lens. Wherein, the __ lens and the lens group are sequentially arranged from the object side to an imaging side along an optical axis. Preferably, the lens set comprises: a second lens and a third lens. The second lens is a positive lens and includes a concave surface and at least an aspheric surface, wherein the concave surface faces away. Haifangfang. The third lens is a negative lens and comprises at least one aspherical surface, wherein the second lens is interposed between the first lens and the third lens. Preferably, the focal length of the first lens and the second lens is a positive value, and the focal length of the third lens is a negative value. M392366 preferably, the second surface of the first lens is provided with an opaque layer comprising a light-transmissive aperture, and the opaque aperture and the opaque layer form the aperture. The light transmission was once a metal film. Preferably, the first lens, the second lens, and the third lens are composed of a flat glass and an optical glue. Preferably, the first surface of the flat glass of the first lens is provided with an IR-CUT film. Preferably, a second surface of the flat glass in the first lens is provided with an opaque layer comprising a light transmissive aperture, and the opaque aperture and the opaque layer form the aperture. The second side of the flat glass is between the flat glass and the optical glue. Preferably, wherein the overall focal length F 之一 of the lens structure has a relationship with the focal length F1 of the first lens: 1 < F0 / F1 < 1.3. Preferably, the focal length F2 of the second lens and the focal length F3 of the third lens have the following relationship: 1 < | F2 / F3 2 . [Embodiment] Please refer to Fig. 2, which is a schematic view of the first embodiment of the creation. As shown in FIG. 5 M392366, the lens structure 200 includes a first lens 21A and a lens group 215. The lens set 215 further includes a second lens 220 and a third lens 230. Furthermore, the first lens 210 and the lens group 215 are sequentially arranged from the object side Bj to the imaging side IMG along an optical axis 1. The first face of the first lens 21G is a convex surface, and faces the object side OBJ, and the second face B thereof is a plane, wherein the surface of the second face B is provided with an aperture APT. The aperture APT is composed of a light transmissive aperture H0L and an opaque layer MET on the second side B of the first lens. Progress has come to 5 children's aperture APT manufacturing process is as follows. First of all, the plane on the first lens 210 (in the present embodiment, the second surface b is a flat surface, however, this creation does not limit which side of the lens the aperture APT is placed on, and only needs to be a flat surface) A metal film is applied to form an opaque layer MET. Then, a light transmissive aperture H?L is formed on the metal thin film layer by a semiconductor lithography process to serve as an aperture of the aperture APT. Therefore, the manufacturing process of the aperture APT is particularly suitable for use in a process using a wafer-level lens structure, that is, for this wafer-level lens structure, the creation can not only enhance the lens. The performance of the structure, reducing optical imperfections (such as: aberrations and chromatic aberrations), can also significantly reduce the cost and complexity of the lens structure, can be described as a multiplier. In the present embodiment, the second lens 220 is a positive lens whose first face is a concave surface and faces the object side OBJ. Furthermore, the second lens 220 includes at least one aspherical surface. In the present embodiment, the first surface c of the second lens 220 is the aspherical surface, and the second surface D is a spherical surface. However, in other embodiments of the present invention, the second side of the second mirror M392366 may also be aspherical. Further, the third lens 23 is a negative lens 'and also contains at least - aspherical surface. The second lens and the third lens 130 in this embodiment are both composed of flat glass and optical glue. As shown in the figure, the second lens 22 includes a flat glass 222, and a curved portion composed of optical glue, such as The first surface c and the second surface are both made of optical glue. The third lens 23 includes a flat glass 232 and a curved portion formed of optical glue, such as a first surface and a second surface F 〇孀 in a first embodiment of the present invention, and a The implementation concept of the IR-CUT film on the lens. Please refer to Figure 3. As shown, the lens structure 300 of FIG. 3 includes a first lens 31 and a lens group 315. The lens group 315 includes a second lens 320 and a third lens 33. Furthermore, the lens structure 300 further includes a flat glass 340. The lens in the lens structure 300 includes a total of five aspherical surfaces, which are a curved portion 311 of the first lens φ 310, curved portions 321 and 323 of the second lens 320, and curved portions 331 and 333 of the second lens, wherein The curved surfaces of these aspheric surfaces are composed of optical glue. In addition, in addition to the curved portion formed by the optical glue, the first lens 310 further includes a flat glass 312, the second lens 320 further includes a flat glass 322 ', and the third lens still includes a flat glass 332, in other words, in the present In the embodiment, the first, first and second lenses 310, 320 and 330 are each composed of flat glass and optical glue. However, this unique limitation of the present invention, in other embodiments of the present invention, also encompasses lenses formed by other possible means. 7 M392366 In addition, the first face a' of the first lens 310 is formed by the aspherical curved surface portion 3ιι, and is the convex face of the object side (10) and the second face B of the first lens 31〇. It is plated with a layer of infrared cut filter layer IR. The second lens is a positive lens and includes a concave surface (first surface c,) and a convex surface (second surface D,) which are both aspherical surfaces. The third lens 330 is a negative lens and includes a first face E that is both aspherical and a second face F'. The focal length F1 of the first lens 310 is a positive value, the focal length F2 of the second lens 32 is a positive value, and the focal length F3 of the third lens 33 is a negative value. Furthermore, the numerical relationship between the focal lengths m and F3 is 1 < | F2 / F3 | < 2, and the numerical relationship between the focal length F1 of the first lens 31 and the overall focal length f 镜头 of the lens structure 300 is 1 < F 〇 /pi<1 3. The refractive indices of the first lens 310, the second lens 320 and the third lens 330 and the plate glass 34 are between 1.5 and 1.6. As can be seen from the above embodiments, the present invention simplifies the process of the conventional lens structure by plating an infrared light-cutting filter layer on a lens. Next, a more advanced description will be given of a lens structure in which a lens of an infrared light cut filter layer and a diaphragm structure are simultaneously bonded to a single lens. Please refer to Fig. 4, which is a third embodiment of the present creation. As shown, the lens structure 4 includes a first lens 410 and a lens set 415. The lens set 415 includes a second lens 420 and a third lens 430. Furthermore, the lens structure 4A includes a flat glass 44". The lens in the lens structure 400 comprises a total of five aspherical surfaces, which are a curved portion 411 of the first lens 41 曲面 a curved portion 421 and 423 of the second lens 420, and curved portions 431 and 433 of the third lens, wherein The curved surfaces of these aspheric surfaces are composed of optical glue. In addition, in addition to the curved portion formed by the optical glue, the first lens 41 includes M392366 having a flat glass 4i2, the second mirror 4 420 includes a flat glass, and the third lens includes a flat glass 432, in other words, In this embodiment, the first, second and third lenses 4H), 420 and 430 are each formed by a flat plate breaking and optical glue. However, this non-creative of the present invention also includes lenses formed by other possible means. • The second surface η of the flat glass 412 in the first lens (also the first surface β of the first lens 410) is bonded with an infrared ray layer, and a first surface K of the flat glass 412 is interposed between the slabs The glass 412 and the curved surface portion 41丨 formed by the optical glue are plated with a light-transmissive layer MET having a light-transmissive (10)H〇L, and the +-transmissive aperture HOL and the opaque layer met form a lens structure. 4〇〇 aperture Αρτ. The difference between this embodiment and the above embodiment is that the first lens has an infrared light cut filter layer IR in addition to having an aperture. In addition, the first surface A" of the first lens 410 is formed by a curved surface portion 411 of the aspheric surface and formed as a convex surface of the object side (10). The second lens 42 is a positive lens and includes both The aspherical concave surface (first surface c") and the convex surface (second surface D"). The third lens 430 is a negative lens and includes a first surface E" and a second surface F which are both aspherical surfaces. Wherein the focal length F1' of the first lens 410 is a positive value, the focal length F2' of the second lens 42 is a positive value, and the focal length F3' of the third lens 43 is a negative value, wherein the focal length F2 is related to the value of F3. The numerical relationship between the focal point of the first lens and the focal length F0 of the lens structure 400 is 3. Furthermore, the refractive indices of the first lens 410, the second lens 420 and the third lens 43A and the flat glass 44A are between U and i.6. From the above (four), it is known that the process of simplifying the conventional lens structure is achieved by simultaneously placing the infrared reading, the light layer and the shed on the first lens 41 (). Since the concept of this creation sets the aperture and the infrared light-cutting filter layer on the lens in the lens structure, it can effectively reduce the volume of the mirror structure, in order to meet the current miniaturization of the size of the electronic product, and again, the creation This combination of integration can also reduce the optical deviation of the lens structure and improve the image quality. The above descriptions are only preferred embodiments of the present invention, and all changes and modifications made in accordance with the scope of patent application of this creation should be covered by this creation. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an internal schematic view of a conventional lens structure. Fig. 2 is an internal schematic view of the lens structure of the first embodiment of the present invention. Fig. 3 is a schematic view showing the inside of the lens structure of the second embodiment of the present invention. Fig. 4 is a schematic view showing the inside of the lens structure of the third embodiment of the present invention. [Description of main component symbols] 100, 200, 300, 400 lens structure 110~130, 210~230, 310~330, lens M392366 410~430 140 aperture 150 infrared cut filter 215 '315 > 415 lens group 222 , 232, 312, 322, 332, flat glass 340, 412, 422, 432, 440 311 '321 ' 323 ' 331 ' 333 > curved surface portions 411, 421, 423, 43
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