200925693 九、發明說明： • 【發明所屬之技術領域】 -本發明涉及攝像技術領域，特別涉及一種鏡片及使用 該鏡片之鏡頭模組。 【先前技術】 隨著電子產品多功能化之發展，鏡頭模組已成為廣泛 應用於數位相機、攝像機、個人數位助理及帶有攝像功能 〇之行動電話等消費性電子產品中攝像裝置之關鍵零元件。 如圖1所示，通常鏡頭模組100包括鏡筒110，及設置 於鏡筒110内之兩個鏡片13〇及位於兩個鏡片130之間之 間隔體120。該間隔體12〇位於兩個鏡片130之間，用於間 隔兩個鏡片130,以防止兩個鏡片130相互接觸磨損。該鏡 片130包括光學部131及包圍光學部131之固定部132。光 學部131用於使光束完全透過並將光束聚焦於影像感測器 _件上，從而實現成像。 惟’由於光束於鏡頭模組100中之非正常傳輸，如漏 光、光學表面之散射與繞射、透射光學表面之殘餘反射以 及鏡筒110内壁等非光學表面之殘餘反射，光於鏡頭模組 100中傳輸成像之過程中會產生雜散光。請參見Breault等 人於 1990 年發表於 Proceedings of SPIE: Stray Radiation in optical systems 上之論文 Stray light technology: overview of the 1980 decade。特別係於鏡頭模組100之固定部132 靠近先學部131之區域，雜散光現象較為嚴重，導致像面 200925693 對比度與 MTF ( Modulation Transfer Function，調製傳遞函 數）降低’圖像上形成斑點，從而破壞鏡頭模組1 〇〇之成 像品質。 【發明内容】 有鑑於此’提供一種鏡片及使用該鏡片之鏡頭模組， 以散射雜散光，消除雜散光之傳輸路徑，以改善鏡頭模組 之成像品質實屬必要。 以下將以複數實施例說明鏡片及使用該鏡片之鏡頭模 組。 ' 一種鏡片，其包括光學部及包圍該光學部並與光學部 相接之固定部。該光學部用於使光束穿過成像。該固定部 具有至少一與光學部相接之粗糙面，用於散射雜散光。 一種鏡頭模組，其包括鏡筒、及設置於鏡筒内之兩鏡 片。該兩鏡片分別包括光學部及包圍該光學部並與光學部 ❹相接之固定部。該光學部用於使光束穿過成像。該兩鏡片 之固疋部均設置有凸台，使兩鏡片藉由互卡配合方式固 定。兩鏡片中至少-鏡片為具有至少一粗繞面之鏡片，，該 至少一粗糙面位於固定部並與光學部相接，用於散射雜散 光。 、/、先則技術相比，該鏡片表面具有粗糙面，使雜散光 被散射，消除雜散光之傳輸路徑’提高像面對比度盘MTF， 圖像上形成斑點’從而提高成像品質。使用上述鏡片 、，且裝之鏡頭模組可有效散射雜散光，從而提高鏡頭模电之 200925693 成像品質。 【實施方式】 下面將結合附圖及複數實施例，對本技術方案提供之 鏡片及鏡頭模組作進一步之詳細說明。 請參閱圖2及圖3,為本技術方案第一實施例提供之鏡 片10，其包括位於鏡片10中心之光學部11及包圍該光學 部11並與光學部11相接之固定部12。 ® 該光學部11為有效光學成像區域，用於使光束穿過成 像。光學部11具有第一光學面111及與第一光學面111相 對設置之第二光學面112。該第一光學面111與第二光學面 112為球面或非球面。 該固定部12用於固定鏡片10，並具有第一表面121 及與第一表面121相對設置之第二表面122。該第一表面 121與第二表面122分別與光學部11之第一光學面111與 φ 第二光學面112相接。該第一表面121與第二表面122可 全部或部分經過粗化形成粗糙面，用於散射雜散光。本實 施例中，該第一表面121部分經過粗化形成粗糙面，即第 一表面121與光學部11之第一光學面111相接之環形面123 為粗糙面。該環形面123之徑向寬度D以不超出固定部12 之第一表面121為宜。當然，固定部12之第二表面122與 光學部11之第二光學面112之並與環形面123對應之環形 面亦可為粗糙面。該環形面123之粗化可採用人工噴砂、 砂紙打磨或其他機械加工方法，且粗化後之環形面123之 8 200925693 表面粗糙度為10//m〜20//m。 * 該第一表面121與第二表面122粗糙面之大小可視其 •與鏡頭模組中其他元件（如透鏡、間隔件及遮光片等）配 合需要而定。本實施例中，根據固定部12之徑向寬度與光 學設計需要，鏡片10之徑向寬度D為0.05mm〜1mm。 請參閱圖4,為技術方案第二實施例提供之鏡片20, 其結構與第一實施例之鏡片10之結構基本相同，區別在於 固定部22。該固定部22之第二表面222設置有向遠離固定 ®部22方向延伸之凸台23，以使鏡片20可藉由互卡配合方 式固定。可以理解，凸台23亦可設置於第一表面221或同 時設置於固定部22之第一表面221與第二表面222。本實 施例中，凸台23與光學部21之第二光學面212相接。當 然，該凸台23亦可不與光學部21之第二光學面212相接， 以能與其他元件（例如鏡片、間隔體等）相抵配合實現互 卡固定為宜。環形粗化面223於第一表面221並與光學部 @ 21之第一光學面211相接。 請參閱圖5,為技術方案第三實施例提供之鏡頭模組 300,其包括鏡筒30、及沿光軸設置於鏡筒30内之透鏡40、 遮光片50及本技術方案第二實施例提供之鏡片20。 該透鏡40包括透光部41及支撐部42。該透光部41 位於透鏡40中心，用於與鏡片20之光學部21配合成像。 該支撐部42包圍並相接於透光部41，並設置有與鏡片20 之固定部12之凸台23相對應之凸出部43，用於與凸台23 相抵配合，以互卡固定。當然，該透鏡40可為第一實施例 9 200925693 •提供之鏡片i〇或第二實施例提供之鏡片2〇，以能與鏡片 • 20互卡固定為宜。 該遮光片50位於透鏡40與鏡片20之間，起間隔作用。 本實施例中，採用較薄之遮光片50代替間隔環，係由於透 鏡40與鏡片20之凸台設計’於保持透鏡4〇之透光部41 與鏡片20之光學部21於鏡頭模組3〇〇中相對位置不變之 前提下’減小了透鏡40之支撐部42與鏡片20之固定部12 間距。 ❹ 本實施例僅以鏡頭模組300使用一鏡片2〇為例。可理 解，鏡頭模組300亦可使用兩個或兩個以上之鏡片2〇,鏡 頭模組300還可使用苐一實施例提供之鏡片丄〇。 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。 白 【圖式簡單說明】 圖1係先前技術之一種鏡頭模組之剖視圖。 圖2係本技術方案第一實施例提供之鏡片之剖視圖。 圖3係本技術方案第一實施例提供之鏡片之俯視圖。 圖4係本技術方案第二實施例提供之鏡片之剖視圖。 圖5係本技術方案第三實施例提供之鏡頭模組之气視 200925693 【主要元件符號說明】 ‘鏡片 10, 光學部 11， 第一光學面 111 第二光學面 112 固定部 12， 第一表面 121 ®第二表面 122 環形面 123 間隔體 120 環形粗化面 223 凸台 23 鏡頭模組 100 鏡筒 30, ϋ透鏡 40 透光部 41 支撐部 42 凸出部 43 遮光片 50 20 ， 130 21 ， 131 ，211 ，212 22 ， 132 ，221 ，222 ，300 110 11200925693 IX. Description of the Invention: • Technical Field of the Invention The present invention relates to the field of imaging technology, and in particular to a lens and a lens module using the same. [Prior Art] With the development of multi-functionality of electronic products, the lens module has become a key zero for camera devices widely used in consumer electronics such as digital cameras, camcorders, personal digital assistants, and mobile phones with camera functions. element. As shown in FIG. 1, the lens module 100 generally includes a lens barrel 110, two lens members 13 disposed in the lens barrel 110, and a spacer 120 between the two lenses 130. The spacer 12 is located between the two lenses 130 for spacing the two lenses 130 to prevent the two lenses 130 from contacting each other. The lens 130 includes an optical portion 131 and a fixing portion 132 surrounding the optical portion 131. The optical portion 131 is used to completely transmit the light beam and focus the light beam on the image sensor to achieve imaging. However, due to abnormal transmission of the light beam in the lens module 100, such as light leakage, scattering and diffraction of the optical surface, residual reflection of the transmissive optical surface, and residual reflection of non-optical surfaces such as the inner wall of the lens barrel 110, the lens is exposed to the lens module. Stray light is generated during transmission imaging in 100. See the paper by Breault et al., 1990, Proceedings of SPIE: Stray Radiation in optical systems Stray light technology: overview of the 1980 decade. In particular, the fixing portion 132 of the lens module 100 is close to the area of the first-study portion 131, and the stray light phenomenon is serious, causing the contrast of the image plane 200925693 and the MTF (Modulation Transfer Function) to form a spot on the image, thereby destroying The imaging quality of the lens module 1 〇〇. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a lens and a lens module using the same to scatter stray light and eliminate the transmission path of stray light to improve the imaging quality of the lens module. The lens and the lens module using the lens will be described below in the plural embodiments. A lens comprising an optical portion and a fixing portion surrounding the optical portion and in contact with the optical portion. The optic is used to pass a beam of light through imaging. The fixing portion has at least one rough surface that is in contact with the optical portion for scattering stray light. A lens module includes a lens barrel and two lenses disposed in the lens barrel. Each of the two lenses includes an optical portion and a fixing portion that surrounds the optical portion and is in contact with the optical portion. The optic is used to pass a beam of light through imaging. The solid portions of the two lenses are each provided with a boss so that the two lenses are fixed by mutual engagement. At least - the lens of the two lenses is a lens having at least one rough surface, the at least one rough surface being located at the fixed portion and in contact with the optical portion for scattering stray light. Compared with the prior art, the surface of the lens has a rough surface, so that stray light is scattered, and the transmission path of the stray light is eliminated. The image surface contrast plate MTF is increased, and spots are formed on the image to improve the image quality. The above lens, and the mounted lens module can effectively scatter stray light, thereby improving the image quality of the lens mode. [Embodiment] Hereinafter, the lens and the lens module provided by the present technical solution will be further described in detail with reference to the accompanying drawings and the embodiments. Referring to FIG. 2 and FIG. 3, a lens 10 according to a first embodiment of the present invention includes an optical portion 11 at the center of the lens 10 and a fixing portion 12 surrounding the optical portion 11 and contacting the optical portion 11. ® The optics 11 is an effective optical imaging area for passing a beam of light through the image. The optical portion 11 has a first optical surface 111 and a second optical surface 112 disposed opposite to the first optical surface 111. The first optical surface 111 and the second optical surface 112 are spherical or aspherical. The fixing portion 12 is configured to fix the lens 10 and has a first surface 121 and a second surface 122 disposed opposite to the first surface 121. The first surface 121 and the second surface 122 are in contact with the first optical surface 111 of the optical portion 11 and the second optical surface 112, respectively. The first surface 121 and the second surface 122 may be roughened in whole or in part to form a rough surface for scattering stray light. In this embodiment, the first surface 121 is partially roughened to form a rough surface, that is, the annular surface 123 where the first surface 121 and the first optical surface 111 of the optical portion 11 meet is a rough surface. The radial width D of the annular surface 123 is preferably not beyond the first surface 121 of the fixed portion 12. Of course, the annular surface of the second surface 122 of the fixing portion 12 and the second optical surface 112 of the optical portion 11 corresponding to the annular surface 123 may also be a rough surface. The roughening of the annular surface 123 may be by manual sand blasting, sanding or other mechanical processing, and the roughened annular surface 123 8 200925693 has a surface roughness of 10/m to 20/m. * The rough surface of the first surface 121 and the second surface 122 may be sized to match the needs of other components (such as lenses, spacers, and visors) in the lens module. In the present embodiment, the radial width D of the lens 10 is 0.05 mm to 1 mm in accordance with the radial width of the fixing portion 12 and the optical design. Referring to Fig. 4, a lens 20 provided for a second embodiment of the present invention has a structure substantially the same as that of the lens 10 of the first embodiment, except for the fixing portion 22. The second surface 222 of the fixing portion 22 is provided with a boss 23 extending away from the fixing portion 22 so that the lens 20 can be fixed by mutual engagement. It can be understood that the boss 23 can also be disposed on the first surface 221 or the first surface 221 and the second surface 222 of the fixing portion 22. In the present embodiment, the boss 23 is in contact with the second optical surface 212 of the optical portion 21. Of course, the boss 23 may not be in contact with the second optical surface 212 of the optical portion 21, so that it can be interlocked with other components (e.g., lenses, spacers, etc.) to achieve mutual card fixation. The annular roughened surface 223 is on the first surface 221 and is in contact with the first optical surface 211 of the optical portion @21. Referring to FIG. 5 , a lens module 300 according to a third embodiment of the present invention includes a lens barrel 30 , a lens 40 disposed in the lens barrel 30 along the optical axis, a light shielding sheet 50 , and a second embodiment of the present technology. The lens 20 is provided. The lens 40 includes a light transmitting portion 41 and a support portion 42. The light transmitting portion 41 is located at the center of the lens 40 for imaging with the optical portion 21 of the lens 20. The supporting portion 42 surrounds and is in contact with the light transmitting portion 41, and is provided with a protruding portion 43 corresponding to the boss 23 of the fixing portion 12 of the lens 20 for abutting against the boss 23 to be mutually clamped. Of course, the lens 40 can be the first embodiment 9 200925693 • the lens provided or the lens 2 provided in the second embodiment to be mutually affixed to the lens 20 . The light shielding sheet 50 is located between the lens 40 and the lens 20 and functions as a spacer. In this embodiment, a thinner light-shielding sheet 50 is used instead of the spacer ring, because the projections of the lens 40 and the lens 20 are designed to maintain the optical portion 21 of the lens 4 and the optical portion 21 of the lens 20 in the lens module 3. Before the relative position in the crucible is changed, the distance between the support portion 42 of the lens 40 and the fixing portion 12 of the lens 20 is reduced. ❹ This embodiment only uses a lens 2 for the lens module 300 as an example. It can be understood that the lens module 300 can also use two or more lenses 2, and the lens module 300 can also use the lens cartridge provided by the first embodiment. 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 those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. [Simplified illustration of the drawings] Fig. 1 is a cross-sectional view of a lens module of the prior art. 2 is a cross-sectional view of a lens provided by a first embodiment of the present technical solution. 3 is a top plan view of a lens provided by the first embodiment of the present technical solution. 4 is a cross-sectional view of a lens provided by a second embodiment of the present technical solution. FIG. 5 is a view of a lens module according to a third embodiment of the present invention. 200925693 [Major component symbol description] 'Lens 10, optical portion 11, first optical surface 111, second optical surface 112, fixed portion 12, first surface 121 ® second surface 122 annular surface 123 spacer 120 annular roughening surface 223 boss 23 lens module 100 lens barrel 30, ϋ lens 40 light transmitting portion 41 supporting portion 42 protruding portion 43 visor 50 20 , 130 21 , 131,211,212 22 , 132 ,221 ,222 ,300 110 11