200947003 '九、發明說明： .【發明所屬之技術領域】 本發明涉及鏡頭模組技術領域，特別涉及一種鏡頭模 組及組裝鏡頭模組之方法。 【先前技術】 鏡頭模組係將鏡片、墊片、間隔環、紅外截止濾光片 等鏡頭模組元件組裝入鏡筒内，使鏡筒内之鏡片、墊片、 ❹間隔環、紅外截止濾光片等元件同軸設置於鏡筒，從而實 現成像。由於射出成型方法可直接成型塑膠產品，成型週 期短，精度高等優點，通常採用射出成型方法進行批量生 產體積小且高品質之鏡片、鏡筒、墊片、間隔環等塑膠產 品，以滿足鏡頭模組於輕、薄且小型化電子產品中之應用 要求。參見 Yao-Be Wang 等人於文獻 Proceedings of the 2005 IEEE International Conference on Mechatronics July 10-12, 2005, Taipei, Taiwan 中之 Design and Fabrication of an ❹200947003 'IX. INSTRUCTIONS: 1. Technical Field of the Invention The present invention relates to the field of lens modules, and in particular, to a lens module and a method of assembling the lens module. [Prior Art] The lens module is a lens module, such as a lens, a spacer, a spacer ring, an infrared cut filter, etc., into a lens barrel, so that the lens, the spacer, the spacer ring, and the infrared cut filter in the lens barrel Components such as light sheets are coaxially disposed on the lens barrel to achieve imaging. Due to the injection molding method, the plastic product can be directly molded, the molding cycle is short, and the precision is high. The injection molding method is generally used to mass-produce small-sized and high-quality plastic products such as lenses, barrels, gaskets, spacer rings, etc. to meet the lens mode. The application requirements in light, thin and miniaturized electronic products. See Yao-Be Wang et al., Proceedings of the 2005 IEEE International Conference on Mechatronics July 10-12, 2005, Taipei, Taiwan Design and Fabrication of an ❹
All-Electric Tiebarless Injection Molding Machine —文。 目前，射出成型鏡片採用模具進行生產，由於模具錯 位、塑膠經冷卻後會發生收縮或其他原因，均有可能造成 光學元件（如鏡片）之實際光轴與設計光軸不重合，即生 產出鏡片之實際光轴與設計鏡片時之設计光轴之位置存在 偏移量。惟，組裝鏡頭模組通常根據待組裝光學元件之設 計光軸進行對位，並依次組裝入鏡筒内完成鏡頭模組之組 裝。該組裝方法之鏡頭模組中之光學元件之實際光袖沒有 7 200947003 重合’即光抽偏移’降俄了細骚#、玄> 平低了組哀良率。而且光學元件 際光軸不重合使成像品質蠻差 貞變差，從而降低該鏡頭模組之成 像品質。 【發明内容】 、有鑑於此，提供一種鏡頭模組及組裝鏡頭模組之方 法，解決光學元件實際光軸未重合之問題，提高組裝良率 以及成像品質實屬必要。 μ下將以實施例說明—種鏡頭模組及組裝鏡頭模組之 方法。 該鏡頭模組包括其包括鏡筒及組裝於鏡筒内之第 片及第二鏡片，該第-鏡片具有第一凸台，該第二鏡片直 有與第-凸台配合互卡之第二凸台。該第一凸台之内直徑 與第一凸台之外直徑之差大於或等於第一鏡片與第二鏡片 之光軸偏移向量和之絕對值之兩倍。該第二鏡片之外直捏 ❹小於鏡筒之内直徑。 該組裝鏡頭模組之方法，其包括以下步驟：首先將且 有第-凸台之第一鏡片及具有第二凸台之第二鏡片組裝入 鏡筒内’使第-鏡片之第一凸台與第二鏡片之第二凸台配 合互卡。該第一凸台之内直徑與第二凸台之外直徑之差大 於或等於兩倍之光軸偏移向量和之絕對值，從而使該第一 凸台與第二，台之間形成調心間隙。然後移動鏡筒内之第 一鏡片’使第二凸台相對於第一凸台移動第二鏡片與第一 鏡片之光軸偏移向量和，使第一鏡片與第二鏡片之實際光 8 200947003 •轴重合。 . 與先如技術相比，該鏡頭模組中第一凸台之内直徑大 於第二凸台之外直徑，使組裝第一鏡片與第二鏡片時根據 第一鏡片與第二鏡片間之光軸偏移向量和，於鏡筒内相對 於第一鏡片移動第二鏡片，使第一鏡片與第二鏡片之實際 光軸重合，消除光軸偏移現象。採用該組裝鏡頭模組之^ 法，由於調心間隙之存在，於第二鏡頭模組裝入鏡筒内， ❹還可藉由移動第二鏡片，調整第一鏡片與第二鏡片之相對 位置’使第一鏡片與第二鏡片之實際光轴重合，以提高組 裝量率，從而保證鏡頭模組之成像品質。 【實施方式】 :面將結合附圖及實施例對本技術方案實施例提 鏡頭模組及組裝鏡頭模組之方法作進一步詳細說明。 考慮到不同設計之鏡賴組，組裝元件可為 間隔環、紅外截止編或其他元件，且元件數： 、。該組裝7G件可直接組裝入鏡筒内， 鏡筒内’部分组#入鈐片咖^ 力刀組裝於 + 裝鏡内，最終鏡筒與鏡座組裝後，π ，兄碩触。為更清楚說明鏡頭模組之結 于 組之方法，以下將 *、且裝鏡碩模 遮光片為例說明本技術方案之鏡 片及一 模組之方法。 、，、之、，、°構及組裝鏡頭 叫參閱圖1至圖3’本技術方案實施 模組之方法包括以下步驟。 杈供之組裝鏡頭 9 200947003All-Electric Tiebarless Injection Molding Machine. At present, the injection molded lens is produced by using a mold. Due to the misalignment of the mold, the shrinkage of the plastic after cooling, or other reasons, the actual optical axis of the optical component (such as the lens) may not coincide with the design optical axis, that is, the lens is produced. There is an offset between the actual optical axis and the position of the design optical axis when the lens is designed. However, the assembled lens module is usually aligned according to the design optical axis of the optical component to be assembled, and sequentially assembled into the lens barrel to complete the assembly of the lens module. The actual light sleeve of the optical component in the lens module of the assembly method does not have the same degree of 2009. The combination of the light and the offset is reduced. Moreover, the optical axes of the optical components do not coincide so that the image quality is poorly deteriorated, thereby degrading the image quality of the lens module. SUMMARY OF THE INVENTION In view of the above, a lens module and a method of assembling the lens module are provided to solve the problem that the actual optical axis of the optical component does not overlap, and the assembly yield and image quality are necessary. The lens module and the method of assembling the lens module will be described by way of example. The lens module includes a lens barrel and a second piece and a second lens assembled in the lens barrel. The first lens has a first protrusion, and the second lens has a second card and a second card. Boss. The difference between the inner diameter of the first boss and the outer diameter of the first boss is greater than or equal to twice the absolute value of the optical axis offset vector of the first lens and the second lens. The straight pinch outside the second lens is smaller than the inner diameter of the lens barrel. The method for assembling a lens module, comprising the steps of: firstly inserting a first lens having a first boss and a second lens group having a second boss into a lens barrel to make a first boss of the first lens Cooperating with the second boss of the second lens. The difference between the inner diameter of the first boss and the outer diameter of the second boss is greater than or equal to twice the optical axis offset vector and the absolute value, so that the first boss and the second and the table form a tone Heart gap. Then moving the first lens in the lens barrel to move the second projection relative to the first projection to offset the optical axis of the second lens from the optical axis of the first lens, so that the actual light of the first lens and the second lens is 8 200947003 • The axes coincide. Compared with the prior art, the inner diameter of the first boss in the lens module is larger than the outer diameter of the second boss, so that the light between the first lens and the second lens is assembled when the first lens and the second lens are assembled. The axis offset vector sum moves the second lens relative to the first lens in the lens barrel to make the first optical lens coincide with the actual optical axis of the second lens, thereby eliminating the optical axis offset phenomenon. According to the method of assembling the lens module, the second lens module is inserted into the lens barrel due to the existence of the alignment gap, and the relative position of the first lens and the second lens can be adjusted by moving the second lens. 'The first optical lens and the second optical lens are coincident with each other to increase the assembly rate, thereby ensuring the imaging quality of the lens module. [Embodiment] The lens module and the method of assembling the lens module of the embodiment of the present technical solution will be further described in detail with reference to the accompanying drawings and embodiments. Considering the different design of the mirror group, the assembly components can be spacer rings, infrared cut-off or other components, and the number of components: , . The assembled 7G piece can be directly assembled into the lens barrel, and the inside part of the lens barrel is assembled into the mirror. After the final assembly of the lens barrel and the lens holder, π, the brother master touches. In order to clarify the method of forming the lens module, the following is a description of the lens and a module of the present technical solution. The method of implementing the module of the present technical solution includes the following steps. Referring to FIG. 1 to FIG. 3组装 for the assembled lens 9 200947003
I * 第一步，提供鏡頭模組之待組裝元件。 • 鏡頭模組之待組裝元件包括鏡筒130及組裝入鏡筒 130内之第一鏡片110、第二鏡片120及遮光片140。 該鏡筒130用於收容第一鏡片110、遮光片140及第二 鏡片120，且設置有入光孔131。本實施例中，鏡筒130為 一體成型之筒狀結構。當然，該鏡筒130亦可由複數筒狀 結構組合固定而成，只要根據需要將各組裝元件組裝入不 同之筒狀結構中即可。 ® 該第一鏡片110包括位於第一鏡片110中心之第一光 學部111及包圍該第一光學部111並與第一光學部111相接 之第一固定部112。該第一光學部111為有效光學成像區 域，用於使光束穿過成像。該光學部111表面可係球面或 非球面。該第一固定部112用於固定第一鏡片110,其設置 有第一凸台113,以使第一鏡片110可藉由互卡配合方式固 定。 Φ 該第一凸台113可設置於第一固定部112之相對兩表 面中之任意一表面，亦可同時設置於第一固定部112之相 對兩表面。本實施例中，第一凸台113為設置於第一固定 部112之一表面之環形凸台，並位於第一固定部112之外 侧且遠離第一光學部111。該第一凸台113具有第一外側面 1131及與第一外側面1131相對設置之第一内侧面1132。 該第二鏡片120具有第一鏡片110相對應之結構，用 於與第一鏡片110互卡配合組裝鏡頭模組。該第二鏡片120 結構與第一鏡片110之結構基本相同，其包括第二光學部 200947003 -121及與第二光學部121相接之第二固定部122。該第二固 -定部122設置有與第一鏡片110之第一凸台113相對應之 第二凸台123,用於與第一凸台113互卡固定。由於本實施 例中第一鏡片110之環形第一凸台113位於第一固定部112 之外側且遠離第一光學部111，為與第一鏡片110互卡配 合，該第二鏡片120之第二凸台123為與第二光學部121 相接之環形凸台。該第二凸台123具有相對設置之第二内 側面1231與第二外侧面1232。 ® 該遮光片140為開設有透光孔141之環狀結構。該透 光孔141分別與第一鏡片110之第一光學部111及與第二 鏡片120之第二光學部121相對應，以供光束透過。該遮 光片140固定於第一鏡片110與第二鏡片120之間，以防 止第一鏡片110與第二鏡片120互卡固定時，由於相互磨 擦而損壞。由於遮光片140用於與其他光學原件配合，以 供成像光束穿過，故遮光片140之結構可根據與遮光片140 &配合之光學元件結構採用不同設計，不限於本實施例。 第二步，組裝鏡頭模組之待組裝元件。 將第一鏡片110、遮光片140及第二鏡片120依次組裝 入鏡筒130内。 組裝前分別測量出第一鏡片110與第二鏡片120之光 軸偏移向量，即實際光轴相對於設計光軸之偏移量及發生 該偏移量之方向。具體地，由於成型鏡片過程中，熔融態 之塑膠自模具之流道流入模穴經固化後形成鏡片。成型後 每個鏡片均存在澆口，即流道與模穴之交界處，即使將單 11 200947003 •個鏡片剪下，亦會於鏡片之澆口處留有痕跡。因此，只要 -以澆口為參照物即可測量出實際光軸相對於設計光軸之偏 移量’並確定出光轴之偏移方向。 如圖2所示，第一鏡片110之澆口位於第一鏡片110 之徑向截面與第一鏡片110外壁之交線，即第一相交線 AA’ 。第二鏡片120之澆口位於第二鏡片120之徑向截面 與第二鏡片120外壁之交線，第二相交線BB’ 。為方便調 整第二鏡片120相對於第一鏡片110之位置，本實施例中， ® 第一相交線AA’與第二相交線BB’位於鏡頭模組10之同 一徑向截面上之相同一側，且相互平行。第一鏡片110之 實際光軸相對設計光軸向靠近第一相交線AA’之方向偏 移，即第一鏡片110之實際光軸相對設計光軸向左偏移， 且偏移量為m。第二鏡片120之實際光軸相對設計光軸向 遠離第二相交線BB’之方向偏移，即第二鏡片120之實際 光軸相對設計光軸向右偏移，且偏移量為η。其中，m及η φ均為光軸偏移之距離，即正數。當然，第一鏡片110與第 二鏡片120之實際光軸相對設計光軸之偏移方向以及偏移 量以實際測量結果而定，不限於本實施例。 首先，第一鏡片110之第一固定部112未設凸台之表 面朝向鏡筒130之入光孔131，將第一鏡片110組裝入鏡筒 130内具有入光孔131 —端，並固定於鏡筒130内，使第一 鏡片110位於鏡筒130之物侧。再將遮光片140放置於第 一鏡片110之第一固定部112,使遮光片140與第一固定部 112除第一凸台113以外之區域相接觸，透光孔141與第一 12 200947003 •光學部111相對應。 - 然後，將第二鏡片120組裝入鏡筒113内，使第二凸 台123與第一凸台113互卡。互卡之第一凸台113與第二 凸台123之間形成大於或等於光轴偏移向量和之絕對值之 調心間隙150，即相對設置之第二外側面1232與第一内側 面1132之間形成調心間隙150，用於進一步調整第二鏡片 120相對於第一鏡片110之位置，使第二鏡片120與第一鏡 片110之實際光軸相重合。該光軸偏移向量和為第二鏡片 ® 120實際光軸相對於第一鏡片110實際光軸之偏移量。 組裝入鏡筒130之第二鏡片120與第一鏡片110均以 設計光軸作為對位參照物，即第二鏡片120與第一鏡片110 之設計光軸重合。為配合下一步驟調整鏡筒130内第二鏡 片120相對於第一鏡片110之位置，圖2中第一凸台113 與第二凸台123於相對兩側各形成一大於或等於光軸偏移 向量和之絕對值之調心間隙150，才能保證第二鏡片120 φ可相對與第一鏡片110向左或向右移動。因此，第一凸台 113之内直徑與第二凸台123之外直徑之差大於或等於兩倍 之光軸偏移向量和之絕對值。相應地，該鏡筒130之内直 徑與第二鏡片120之外直徑之差大於或等於與兩倍之光軸 偏移向量和之絕對值，以供第二鏡片120於鏡筒130内可 相對於第一鏡片110移動，以調整第二鏡片120相對於第 一鏡片110之位置。 第三步，調整第二鏡片120與第一鏡片110之實際光 轴之位置。 13 200947003 • 經過上一步之組裝步驟，第二鏡片120之設計光轴與 -第一鏡片110之設計光轴重合，惟，由於第二鏡片120與 第一鏡片110存在光軸偏移，即第二鏡片120之實際光軸 DD’未與第一鏡片110之實際光軸CC’重合。由於第一 凸台113與第二凸台123之間存在調心間隙150,使得第二 凸台123可相對於第一凸台113移動。因此根據組裝前測 得之第二鏡片120及第一鏡片110之光軸偏移向量，繼續 移動鏡筒130内之第二鏡片120,使第二鏡片120相對於第 一鏡片110移動光軸偏移向量和，即第二凸台123相對於 第一凸台113移動光軸偏移向量和，使第二鏡片120之實 際光軸DD’與第一鏡片110之實際光軸CC’重合。對於 生產手機用鏡頭模組時，優選地，調心間隙150寬度小於 0.02mm 〇 具體地，由於組裝前測量得到第一鏡片110之實際光 軸相對設計光軸向左偏移，且偏移量為m ;第二鏡片120 φ之實際光軸相對設計光軸向右偏移，且偏移量為η，且m 與η均為正數，故第二鏡片120之光軸偏移向量和為相對 於第一鏡片110向左移動m+n之距離。 如果第一鏡片110之實際光軸相對設計光軸向右偏 移，且偏移量為m。第二鏡片120之實際光轴相對設計光 轴向左偏移，且偏移量為η，故第二鏡片120之光軸偏移向 量和為相對於第一鏡片110向右移動m+n之距離。 因此，當第一鏡片110之實際光軸與第二鏡片120之 實際光軸分別相對各自設計光軸向相反方向分別偏移m與 14 200947003 第即二—ΓΙΓ與第"鏡片12G之光軸向相反方向偏 二==向量和為向靠近第-鏡片110之 I不尤釉方向偏移m+n之距離。 射於一鏡片110與第二鏡片120之實際光軸分別相 自之設計光軸同時向右或同時向左偏移，且偏移量 刀別為m與η，則存在以下三種情況。 當同時向右偏移且m小於η或者同時向左偏移且皿大 ⑩ 於η、’第二鏡片m之光軸偏移向量和為相對於第一鏡 片110向右移動m_n之絕對值之距離。 當Π1等於n時’第二鏡片12〇相對於第一鏡片⑽移 動距=為0, gp第二鏡片12〇之光軸偏移向量和為〇。 當士同時向右偏移且m大於n或者同時向左偏移且皿小 ;寸第一鏡片12〇之光軸偏移向量和為相對於第一鏡 片110向左移動m-n之距離。 因此，當第一鏡片110之實際光軸與第二鏡片12〇之 ❹實際光軸分別相對各自設計光轴向相同方向分別偏移m與 η時，即第一鏡片110與第二鏡片12〇之光軸向相同方向偏 移，第二鏡片120之偏移向量和為向靠近第一鏡片η〇之 實際光轴方向偏移m-n絕對值之距離。 最後’根據需要還可依次將其他元件及鏡座組裝入鏡 筒130内，從而完成鏡頭模組10之組裝。該鏡頭模組1〇 中之光學元件之實際光軸重合。 該鏡頭模組10包括鏡筒130及組裝於鏡筒13〇内之第 一鏡片110及第二鏡片12〇。該第一鏡片11〇具有第一凸台 15 200947003 » 113。該第·一鏡片120具有與第一凸台113配合互卡之第一 -凸台123。該第一凸台之内直徑與第二凸台之外直徑之差等 於或大於第一鏡片與第二鏡片之光軸偏移向量和之絕對值 之兩倍。該第二鏡片之外直徑小於鏡筒之内直徑。第一凸 台113之内直徑大於第二凸台123之外直徑。該第一鏡片 110與第二鏡片120之實際光軸重合。本實施例中，鏡筒 130内還組裝入遮光片140。該遮光片140設置與互卡之第 一鏡片110及第二鏡片120之間。 ❹ 综上所述，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係本技術方案實施例提供之組裝鏡頭模組之示意 ❹圖。 圖2係本技術方案實施例提供之組裝完成之鏡頭模組 之結構示意圖。 【主要元件符號說明】 鏡頭模組 10 第一鏡片 110 第一光學部 111 第一固定部 112 200947003 t -第一凸台 113 第一外側面 1131 第一内側面 1132 第二鏡片 120 第二光學部 121 第二固定部 122 第二凸台 123 第二内側面 1231 ®第二外侧面 1232 Ar/r 鏡闾 130 入光孔 131 遮光片 140 透光孔 141 調心間隙 150 ❹ 17I * The first step is to provide the components to be assembled of the lens module. • The components to be assembled of the lens module include a lens barrel 130 and a first lens 110, a second lens 120, and a light shielding sheet 140 incorporated in the lens barrel 130. The lens barrel 130 is configured to receive the first lens 110, the light shielding film 140, and the second lens 120, and is provided with a light entrance hole 131. In this embodiment, the lens barrel 130 is an integrally formed cylindrical structure. Of course, the lens barrel 130 may also be fixed by a combination of a plurality of cylindrical structures, as long as the assembly elements are assembled into different cylindrical structures as needed. The first lens 110 includes a first optical portion 111 located at the center of the first lens 110 and a first fixed portion 112 surrounding the first optical portion 111 and contacting the first optical portion 111. The first optical portion 111 is an effective optical imaging region for passing a light beam through imaging. The surface of the optical portion 111 may be spherical or aspherical. The first fixing portion 112 is for fixing the first lens 110, and is provided with a first boss 113 so that the first lens 110 can be fixed by mutual engagement. Φ The first protrusions 113 may be disposed on any one of the opposite surfaces of the first fixing portion 112, or may be disposed on opposite surfaces of the first fixing portion 112 at the same time. In this embodiment, the first boss 113 is an annular boss disposed on one surface of the first fixing portion 112 and located on the outer side of the first fixing portion 112 and away from the first optical portion 111. The first boss 113 has a first outer side surface 1131 and a first inner side surface 1132 disposed opposite the first outer side surface 1131. The second lens 120 has a structure corresponding to the first lens 110 for assembling the lens module with the first lens 110. The structure of the second lens 120 is substantially the same as that of the first lens 110, and includes a second optical portion 200947003-121 and a second fixing portion 122 that is in contact with the second optical portion 121. The second fixing portion 122 is provided with a second boss 123 corresponding to the first boss 113 of the first lens 110 for latching with the first boss 113. In this embodiment, the annular first boss 113 of the first lens 110 is located outside the first fixing portion 112 and away from the first optical portion 111, and is engaged with the first lens 110, and the second lens 120 is second. The boss 123 is an annular boss that is in contact with the second optical portion 121. The second boss 123 has a second inner side surface 1231 and a second outer side surface 1232 which are oppositely disposed. ® The light shielding sheet 140 is an annular structure in which the light transmission holes 141 are opened. The light transmission holes 141 correspond to the first optical portion 111 of the first lens 110 and the second optical portion 121 of the second lens 120, respectively, for the light beam to pass therethrough. The opaque sheet 140 is fixed between the first lens 110 and the second lens 120 to prevent damage to the first lens 110 and the second lens 120 due to mutual friction. Since the light shielding sheet 140 is used for mating with other optical originals for the imaging light beam to pass through, the structure of the light shielding sheet 140 can be differently designed according to the optical element structure matched with the light shielding sheet 140 & not limited to this embodiment. In the second step, the components of the lens module to be assembled are assembled. The first lens 110, the light shielding sheet 140, and the second lens 120 are sequentially assembled into the lens barrel 130. The optical axis offset vector of the first lens 110 and the second lens 120 is measured before assembly, that is, the offset of the actual optical axis with respect to the design optical axis and the direction in which the offset occurs. Specifically, during the molding of the lens, the molten plastic forms a lens from the flow path of the mold into the cavity after solidification. After forming, there is a gate in each lens, that is, the junction between the flow path and the cavity. Even if the lens is cut, the trace will remain at the gate of the lens. Therefore, the offset amount of the actual optical axis with respect to the design optical axis can be measured with the gate as a reference and the offset direction of the optical axis can be determined. As shown in Fig. 2, the gate of the first lens 110 is located at the intersection of the radial section of the first lens 110 and the outer wall of the first lens 110, i.e., the first intersection line AA'. The gate of the second lens 120 is located at the intersection of the radial section of the second lens 120 and the outer wall of the second lens 120, and the second intersection line BB'. In order to facilitate the adjustment of the position of the second lens 120 relative to the first lens 110, in this embodiment, the first intersecting line AA' and the second intersecting line BB' are located on the same side of the same radial section of the lens module 10. And parallel to each other. The actual optical axis of the first lens 110 is offset from the direction of the design light axis toward the first intersection line AA', i.e., the actual optical axis of the first lens 110 is offset leftward relative to the design light axis, and the offset is m. The actual optical axis of the second lens 120 is offset from the direction of the design optical axis away from the second intersecting line BB', i.e., the actual optical axis of the second lens 120 is offset rightward relative to the design optical axis, and the offset is η. Where m and η φ are the distances of the optical axis offset, that is, positive numbers. Of course, the offset direction and the offset of the actual optical axis of the first lens 110 and the second lens 120 with respect to the design optical axis are determined by actual measurement results, and are not limited to the embodiment. First, the first fixing portion 112 of the first lens 110 is not provided with the surface of the boss facing the light entrance hole 131 of the lens barrel 130. The first lens 110 is assembled into the lens barrel 130 and has a light entrance hole 131 end, and is fixed to In the lens barrel 130, the first lens 110 is placed on the object side of the lens barrel 130. The light shielding sheet 140 is placed on the first fixing portion 112 of the first lens 110, so that the light shielding sheet 140 is in contact with the first fixing portion 112 except the first protruding portion 113, and the light transmission hole 141 is first and the first 12 200947003. The optical portion 111 corresponds to each other. - Then, the second lens 120 is assembled into the lens barrel 113 so that the second boss 123 and the first boss 113 are stuck to each other. A self-aligning gap 150 is formed between the first boss 113 and the second boss 123 of the mutual card, which is greater than or equal to the absolute value of the optical axis offset vector, that is, the oppositely disposed second outer side surface 1232 and the first inner side surface 1132 A centering gap 150 is formed between the second lens 120 and the first lens 110 to adjust the position of the second lens 120 to coincide with the actual optical axis of the first lens 110. The optical axis offset vector is the offset of the actual optical axis of the second lens ® 120 relative to the actual optical axis of the first lens 110. The second lens 120 and the first lens 110 assembled into the lens barrel 130 each have a design optical axis as a reference object, that is, the second lens 120 coincides with the design optical axis of the first lens 110. In order to adjust the position of the second lens 120 in the lens barrel 130 relative to the first lens 110 in the next step, the first boss 113 and the second boss 123 in FIG. 2 form an optical axis offset greater than or equal to the optical axis on opposite sides. The centering gap 150 of the vector and the absolute value is shifted to ensure that the second lens 120 φ can move relative to the first lens 110 to the left or right. Therefore, the difference between the inner diameter of the first boss 113 and the outer diameter of the second boss 123 is greater than or equal to twice the absolute value of the optical axis offset vector. Correspondingly, the difference between the inner diameter of the lens barrel 130 and the outer diameter of the second lens 120 is greater than or equal to the absolute value of the optical axis offset vector twice, so that the second lens 120 can be opposite in the lens barrel 130. The first lens 110 is moved to adjust the position of the second lens 120 relative to the first lens 110. In the third step, the position of the actual optical axis of the second lens 120 and the first lens 110 is adjusted. 13 200947003 • After the assembly step of the previous step, the design optical axis of the second lens 120 coincides with the design optical axis of the first lens 110. However, since the second lens 120 and the first lens 110 have an optical axis offset, that is, The actual optical axis DD' of the second lens 120 does not coincide with the actual optical axis CC' of the first lens 110. Since the centering gap 150 exists between the first boss 113 and the second boss 123, the second boss 123 is movable relative to the first boss 113. Therefore, according to the optical axis offset vector of the second lens 120 and the first lens 110 measured before assembly, the second lens 120 in the lens barrel 130 is continuously moved to shift the optical axis of the second lens 120 relative to the first lens 110. The vector sum, that is, the second boss 123 moves the optical axis offset vector sum with respect to the first boss 113 such that the actual optical axis DD' of the second lens 120 coincides with the actual optical axis CC' of the first lens 110. For the production of the lens module for a mobile phone, preferably, the width of the alignment gap 150 is less than 0.02 mm. Specifically, the actual optical axis of the first lens 110 is offset to the left of the design optical axis by the pre-assembly measurement, and the offset is Is m; the actual optical axis of the second lens 120 φ is right offset from the design light axis, and the offset is η, and m and η are both positive numbers, so the optical axis offset vector sum of the second lens 120 is relative The first lens 110 is moved to the left by a distance of m+n. If the actual optical axis of the first lens 110 is right-shifted relative to the design light axis, the offset is m. The actual optical axis of the second lens 120 is offset leftward relative to the design optical axis, and the offset is η, so the optical axis offset vector sum of the second lens 120 is shifted to the right relative to the first lens 110 by m+n. distance. Therefore, when the actual optical axis of the first lens 110 and the actual optical axis of the second lens 120 are respectively offset from the opposite directions of the respective design optical axes by m and 14 respectively, the optical axis of the second lens and the lens 12G The second direction == vector sum in the opposite direction is the distance from the illuminating direction of the first lens 110 that is not particularly glazed by m+n. The actual optical axes of a lens 110 and the second lens 120 are respectively shifted to the right or simultaneously to the left, and the offsets are m and η. The following three cases exist. When simultaneously shifted to the right and m is smaller than η or simultaneously shifted to the left and the dish is larger than η, 'the optical axis offset vector of the second lens m is the absolute value of m_n moving to the right relative to the first lens 110. distance. When Π1 is equal to n, the second lens 12's moving distance with respect to the first lens (10) = 0, and the optical axis offset vector sum of the gp second lens 12's is 〇. When the singer is shifted to the right at the same time and m is greater than n or both is shifted to the left and the dish is small; the optical axis offset vector of the first lens 12 和 is the distance moved to the left by m-n with respect to the first lens 110. Therefore, when the actual optical axis of the first lens 110 and the actual optical axis of the second lens 12 are respectively shifted by m and η from the same direction of the respective design optical axes, that is, the first lens 110 and the second lens 12〇 The light is axially offset in the same direction, and the offset vector sum of the second lens 120 is a distance offset from the absolute value of mn toward the actual optical axis of the first lens η. Finally, other components and lens holders can be sequentially loaded into the lens barrel 130 as needed, thereby completing the assembly of the lens module 10. The actual optical axes of the optical components in the lens module 1 are coincident. The lens module 10 includes a lens barrel 130 and a first lens 110 and a second lens 12A assembled in the lens barrel 13A. The first lens 11 has a first boss 15 200947003 » 113. The first lens 120 has a first-bump 123 that is engaged with the first boss 113. The difference between the inner diameter of the first boss and the outer diameter of the second boss is equal to or greater than twice the absolute value of the optical axis offset vector of the first lens and the second lens. The outer diameter of the second lens is smaller than the inner diameter of the lens barrel. The inner diameter of the first boss 113 is larger than the outer diameter of the second boss 123. The first lens 110 coincides with the actual optical axis of the second lens 120. In this embodiment, the light shielding sheet 140 is also incorporated in the lens barrel 130. The light shielding sheet 140 is disposed between the first lens 110 and the second lens 120 of the mutual card.综 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 persons skilled in the art in light of the present invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an assembled lens module provided by an embodiment of the present technical solution. FIG. 2 is a schematic structural diagram of an assembled lens module provided by an embodiment of the present technical solution. [Major component symbol description] Lens module 10 First lens 110 First optical portion 111 First fixing portion 112 200947003 t - First boss 113 First outer side surface 1131 First inner side surface 1132 Second lens 120 Second optical portion 121 second fixing portion 122 second boss 123 second inner side surface 1231 ® second outer side surface 1232 Ar / r mirror 闾 130 light entrance hole 131 light shielding sheet 140 light transmission hole 141 alignment gap 150 ❹ 17