201007240 九、發明說明： 【發明所屬之技術領域】 本發明涉及光學系統技術領域，尤其涉及一種可減少 眩光之鏡頭模組及具有該鏡頭模組之相機模組。201007240 IX. Description of the Invention: [Technical Field] The present invention relates to the field of optical systems, and more particularly to a lens module capable of reducing glare and a camera module having the lens module.
«I 【先前技術】 隨著電子產品多功能化之發展，相機模組於手機、筆 記本電腦、個人數位助理等消費性電子產品中得到廣泛應 ©用。人們追求多功能化之同時，亦希望電子產品具有優良 之影像效果，即，希望相機模組具有優良之成像品質。 Takano, Η 於 1995 年 2 月發表於 “Consumer Electronics” 上之一篇名為 “Two-phase direct-drive motor built into a camcorders zoom lens barrel”文章中，揭示一種相機模組， 其具有優良之成像品質，同時具有結構緊湊之優點。 相機模組通常係由裝有光學元件之鏡筒與設置有影像 ▲感測器之鏡座組成。請參閱圖5所示之相機模組200，其包 括鏡座210、鏡筒220、第一鏡片230、第二鏡片240、間 隔環250，及影像感測器260。間隔環250設置於第一鏡片 230與第二鏡片240之間，其用於間隔第一鏡片230與第二 鏡片240,以防止相鄰鏡片間發生摩擦或碰撞而受損。鏡筒 220藉由螺紋旋入鏡座210中固定調整鏡筒220與鏡座210 之相對位置，並使鏡筒220内之光學鏡片所形成之光學系 統之成像面落於該影像感測器260。惟，部分入射光線並非 直接折射後進入影像感測器260,而於間隔環250之表面反 8 201007240 射後進入影像感測H 26G’從而形成眩光，造成影像模糊， 眩光之存在嚴重影響所拍攝影像之品質。 有鑑於此’提供-種能減少眩光之鏡頭模址及具有該 鏡頭模組之相機模組實屬必要。 / 【發明内容】 下面將以具體實施例說明一種鏡頭模組。 本發明提供-種鏡頭模組，其包括鏡筒、第一鏡片、 第二鏡片以及間隔環，該第一鏡片、間隔環與第二鏡片沿 光軸依次設置於鏡筒内，該間隔環具有第一表面、與第二 表面相對之第二表面以及連接第一表面與第二表面、之内 壁，該第一表面與第一鏡片接觸，該第二表面與第二鏡片 接觸，其改進在於，該内壁包括相連接之第一斜面與第二 斜面，該第-斜面與第一表面之爽角為銳角，該第‘斜面 與第二表面之央角亦為銳角。本發明還提供一種 ❹頭模組之相機模組。 另"規 相較於先前技術，本技術方案之鏡頭模組利用間隔環 之第-斜面與第二斜面直接或間接之散射或反射作用，可 使=射到間隔環内壁之光線反射到物侧方向，使得最終射 向靠近像側之影像感測器之反射光分散減弱，可有效減少 眩光，提高鏡頭模組成像品質。 f實施方式】 下面將結合複數實施例與附圖對本技術方案之鏡頭模 9 201007240 組及具有該鏡頭模組之相機模組作進一步之詳細說明。 請一併參閱圖1及圖2,本技術方案第一實施例提供之 相機模組1包括鏡頭模組10、鏡座20以及影像感測器30。 . 該鏡座20具有第一收容孔22，該第一收容孔22之内 . 壁設置有内螺紋。該鏡頭模組10與影像感測器30收容於 第一收容孔22之兩側。該鏡頭模組10用於形成光學成像。 該影像感測器30位於相機模組1之像側，其與印刷電路板 40相連接以將影像感測器30之數位訊號轉換為電學訊號 ®並傳輸至外界。該影像感測器30可為電荷耦合器件（Charge Coupled Device，簡稱CCD )或互補金屬氧化物半導體電晶 體(Complementary Metal Oxide Semiconductor Transistor, 簡稱CMOS)，用於將光學成像訊號轉換成數位訊號。 具體地，該鏡頭模組10包括鏡筒11、第一鏡片12、 第二鏡片13以及間隔環14。 該鏡筒11為圓筒體，包括筒壁101以及鏡頭蓋111。 ◎該鏡筒11設置有與該鏡座20相配合之外螺紋，從而鏡筒 11與鏡座20可藉由螺紋配合固定。該鏡筒11之筒壁101 圍合形成圓柱形之第二收容孔102,該第二收容孔102用於 收容該第一鏡片12、間隔環14與第二鏡片13。該鏡頭蓋 111具有一圓形透光孔104,以使外界光線能藉由透光孔104 入射到鏡筒11内。 該第一鏡片12、間隔環14與第二鏡片13沿光軸依次 收容於鏡筒11内。該第一鏡片12靠近物側，其包括位於 鏡片中心部分之第一光學部121與環繞第一光學部121設 201007240 置之第-非光學部122。該第-光學部m用於成像過程中 實現設計之光學功能。該第一非光學部122不參與成像， 用於支撲第-光學部121。該第—非光學部122具有相對之 第-抵靠面123與第二抵靠面124。該第__抵靠面123與鏡 筒η之鏡頭蓋lu接觸抵靠。該第二抵靠自124隔 14接觸抵靠。 & 該第二鏡片13靠近像側，其包括位於鏡片中心部分之 ❹ 第二光學冑131與環繞第二光學部131 <第二非光學部 132。;該第二光學部131用於成像過財實現設計之光學功 能。該第二非光學部132不參與成像。該第二非光學部出 具有f第—鏡片12相對之第三抵靠面133。該第三抵靠面 133與間隔環14接觸抵靠。 該間隔環14為圓環，位於第一鏡片12與第二鏡片13 之二用於間隔第一鏡片12與第二鏡片…該間隔環“ 具有第一表面141、輿篦一矣品 、弟表面141相對之第二表面ι42 ❹以及連接第一表面141與第二表自⑷之内壁⑷與外壁 144。該第一表面ι41與第一 丹罘鏡月12之第二抵靠面124接«I [Prior Art] With the development of multi-functional electronic products, camera modules have been widely used in consumer electronic products such as mobile phones, notebook computers, and personal digital assistants. While people are pursuing multi-functionality, they also hope that electronic products have excellent image effects, that is, they hope that the camera module has excellent image quality. Takano, 文章, published in "Consumer Electronics" in February 1995, entitled "Two-phase direct-drive motor built into a camcorders zoom lens barrel", reveals a camera module with excellent imaging. Quality, while having the advantage of compact structure. The camera module usually consists of a lens barrel with optical components and a lens holder with an image sensor. Please refer to the camera module 200 shown in FIG. 5, which includes a lens holder 210, a lens barrel 220, a first lens 230, a second lens 240, a spacer ring 250, and an image sensor 260. The spacer ring 250 is disposed between the first lens 230 and the second lens 240 for spacing the first lens 230 and the second lens 240 to prevent friction or collision between adjacent lenses from being damaged. The lens barrel 220 is screwed into the lens holder 210 to fix the relative position of the lens barrel 220 and the lens holder 210, and the imaging surface of the optical system formed by the optical lens in the lens barrel 220 falls on the image sensor 260. . However, part of the incident light is not directly refracted and enters the image sensor 260, and the surface of the spacer ring 250 is inverted 8 201007240 and then enters the image sensing H 26G' to form glare, which causes image blurring, and the presence of glare seriously affects the shooting. The quality of the image. In view of this, it is necessary to provide a lens module capable of reducing glare and a camera module having the lens module. / SUMMARY OF THE INVENTION A lens module will be described below with specific embodiments. The present invention provides a lens module including a lens barrel, a first lens, a second lens, and a spacer ring. The first lens, the spacer ring and the second lens are sequentially disposed in the lens barrel along an optical axis, and the spacer ring has a first surface, a second surface opposite the second surface, and an inner wall connecting the first surface and the second surface, the first surface being in contact with the first lens, the second surface being in contact with the second lens, the improvement being that The inner wall includes a first inclined surface and a second inclined surface, and the refreshing angle of the first inclined surface and the first surface is an acute angle, and the central angle of the first inclined surface and the second surface is also an acute angle. The invention also provides a camera module of a hammer module. In contrast, prior to the prior art, the lens module of the present invention utilizes the direct or indirect scattering or reflection of the first-slope and the second slope of the spacer ring to reflect the light incident on the inner wall of the spacer ring. In the lateral direction, the scattered light which is finally directed toward the image sensor near the image side is dispersed, which can effectively reduce glare and improve the imaging quality of the lens module. f Embodiments The lens module 9 201007240 of the present technical solution and the camera module having the lens module will be further described in detail below with reference to the embodiments and the accompanying drawings. Referring to FIG. 1 and FIG. 2 together, the camera module 1 provided by the first embodiment of the present invention includes a lens module 10, a lens holder 20, and an image sensor 30. The lens holder 20 has a first receiving hole 22, and the wall is provided with an internal thread. The lens module 10 and the image sensor 30 are received on both sides of the first receiving hole 22. The lens module 10 is used to form optical imaging. The image sensor 30 is located on the image side of the camera module 1, and is connected to the printed circuit board 40 to convert the digital signal of the image sensor 30 into an electrical signal and transmitted to the outside. The image sensor 30 can be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) for converting an optical imaging signal into a digital signal. Specifically, the lens module 10 includes a lens barrel 11, a first lens 12, a second lens 13, and a spacer ring 14. The lens barrel 11 is a cylindrical body including a cylindrical wall 101 and a lens cover 111. ◎ The lens barrel 11 is provided with a threaded engagement with the lens holder 20, so that the lens barrel 11 and the lens holder 20 can be fixed by screwing. The cylindrical wall 101 of the lens barrel 11 encloses a cylindrical second receiving hole 102 for receiving the first lens 12, the spacer ring 14, and the second lens 13. The lens cover 111 has a circular light transmission hole 104 for allowing external light to enter the lens barrel 11 through the light transmission hole 104. The first lens 12, the spacer ring 14 and the second lens 13 are sequentially accommodated in the lens barrel 11 along the optical axis. The first lens 12 is adjacent to the object side and includes a first optical portion 121 located at a central portion of the lens and a first non-optical portion 122 disposed around the first optical portion 121. The first optic portion m is used to realize the optical function of the design during the imaging process. The first non-optical portion 122 does not participate in imaging, and is used to fly the first optical portion 121. The first non-optical portion 122 has a first abutting surface 123 and a second abutting surface 124. The __ abutment surface 123 is in contact with the lens cover lu of the lens barrel η. The second abutment is contacted by the 124 partition 14 . & The second lens 13 is adjacent to the image side and includes a second optical aperture 131 located at a central portion of the lens and a second non-optical portion 132 surrounding the second optical portion 131 < The second optical portion 131 is used to image the optical function of the design. The second non-optical portion 132 does not participate in imaging. The second non-optical portion has a third abutment surface 133 opposite the f-lens 12. The third abutment surface 133 is in contact with the spacer ring 14. The spacer ring 14 is a ring, and the two of the first lens 12 and the second lens 13 are used for spacing the first lens 12 and the second lens. The spacer ring has a first surface 141, a surface, and a surface. 141 opposite to the second surface ι42 ❹ and the first surface 141 and the second surface (4) from the inner wall (4) and the outer wall 144. The first surface ι41 is connected to the second abutment surface 124 of the first Tanjung Mirror 12
觸抵罪’該第二表面142與第二鏡片U 接觸抵靠。 133 f? 土 143包括相連接之第-斜面145 *第二斜面 斜面145與第—表面141之夾角為銳角心。該 6與第二表面142之夾角為銳角02。該第一斜 而141 =第二斜面146之間形成一夾角~。由於該第一表 ”第二表面142平行’因而’該夾角Θ之大小等於 11 201007240 ，該夾角Θ值之範圍為5〇 銳角與銳角Θ2之和。優選地 0〜90。。 該外壁Μ4與發101相接觸。若該内壁143與外壁 -144於第一表面141上之距離為u，於第二表面142上之 .距離為L2,則根據第一鏡片12之光學參數之不同，以之 值既可大於L2之值，亦可小於或等於L2之值。本實施例 中’ Li之值大於L2之值。該間隔環14可一體成型，亦可 組裝構造。本實施例中，該間隔環14為—體成型。該間隔 環14之材料為不透光塑膠。 當該相機模組1工作時，大部分入射光線會依次穿過 該第一鏡片12之第一光學部121、第二鏡片13之第二光學 部131，從而於影像感測器3〇上形成影像並由印刷電路板 40傳輸至外界，但可能有小部分光線於穿過第一鏡片以 之第一光學部121後，會射向間隔環14之内壁143並發生 反射。由於本技術方案中之間隔環143具有相連接之第一 ❿斜面145與第二斜面146,因而，射向内壁143之一部分光 線可能會直接被第二斜面146散射或反射到物侧方向。射 向内壁143之另一部分光線可能會先到達該第一斜面 145，接著由第一斜面145散射或反射到第二斜面146，再 經第二斜面146散射或反射到物侧方向。從而，該間隔環 14可將入射到間隔環14之内壁143之光線儘量散射或反射 到物側方向’分散並減弱最終射向靠近像侧之影像感測器 3〇之反射光，可避免大量反射光進入到影像感測器3〇而形 成眩光’而造成影像模糊之狀況。 12 201007240 當然，為便於製造成型，間隔環亦可分成複數部分進 行^裝製造。請參閱圖3,本技術方案第二實施例提供之間 隔環24包括第一間隔部241與第二間隔部242。該第一間 .，部241與第二間隔部242均為半環形結構。該第一間隔 -部241具有第一配合面243,該第二間隔部％具有與第一 配D面243相對應之第二配合面244。優選地，該第一配合 面243與第一配合面244均為斜面。本實施例中，該第一 配合面243與第一表面245之夹角為銳角，與第二表面撕 之夾角為鈍角。該第二配合面244與第一表面⑷之爽角 為鈍角，與第二表面246之夾角為銳角。且，第一配合面 243與第表面245之夹角等於第二配合面244與一 :之爽人角’第一配合面243與第二配合面 第一配5面244與第一表面245之夹角。從而，第一間隔 部241與第二間隔部242可藉由第一配合面⑷與第二配 合面244相互承靠進行接合，並用黏合劑黏合或其他方式 ❹固定形成間隔環24。 月參閱圖4 ’本技術方案第三實施例提供之間隔環34 包括第一間隔環341盥篦-p彳眩卢斗姑 衣〃 L衣342。该第-間隔環341 與第一間_ 342均為圓環形。第-間隔環341 I有第一 :=、第三表面347以及第一斜面345。第二間隔環Μ 第門Μ第四表面348以及第二斜面346。從而， ^一間㈣341與第二間隔部342可藉由第三表面347愈 :::面348之相互承靠進行接合，並用黏合劑點合或宜 他方式固定形成間隔環34。該第一斜面345與第二斜面撕 13 201007240 之夾角為銳角。優選地，該第一斜面345與第二斜面346 之夾角範圍為50°〜90。。 當然’該鏡頭模組包括三個或三個以上之鏡片時，其 -還可包括兩個或兩個以上之間隔環，從而於任意相鄰兩鏡 -片間均設置一間隔環。另外，該間隔環亦可設置於鏡片與 紅外截止濾光片之間。總之，由於反射而產生眩光之任何 兩光學元件之間均可藉由設置該間隔環以避免眩光之形 成。 相較於先前技術，本技術方案之鏡頭模組具有如下優 點：其利用該間隔環之第一斜面與第二斜面之直接或間接 之散射或反射作用，可使入射到間隔環内壁之光線反射到 物侧方向，使得最終射向靠近像側之影像感測器之反射光 分散減弱，可有效減少眩光，並提高鏡頭模組之成像品質。 綜上所述，本發明確已符合發明專利之要件，遂依法 $出專利中請。惟，以上所述者僅為本發明之較佳實施方 ❿工’自不能以此限制本案之中請專利範圍。舉凡孰 ，之人士援依本發明之精神所作之等效修錦或變：彳 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖W本技術方案第-實_提供之相機模組之剖視 =2係本技術方㈣—實施例提供之間 圖3係本技财㈣二料騎供之 圖4係本技術方案第三實施例提供之間隔環； 14 201007240 圖5係先前技術中相機模組之剖視圖。 【主要元件符號說明】 . 相機模組 1 - 鏡頭模組 10 鏡同 11 第一鏡片 12 第二鏡片 13 ❹間隔環 14 、 24 、 34 鏡座 20 第一收容孔 22 影像感測器 30 印刷電路板 40 筒壁 101 第二收容孔 102 ^透光子L 104 鏡頭蓋 111 第一光學部 121 第一非光學部 122 第一抵靠面 123 第二抵靠面 124 第二光學部 131 第二非光學部 132 第三抵靠面 133 15 201007240 第一表面 141 、 245 、 343 第二表面 142 、 246 、 344 内壁 143 ^ 外壁 144 • 第一斜面 145 、 247 、 345 第二斜面 146 ' 248 ' 346 第一間隔部 241 第二間隔部 242 ❹第一配合面 243 第二配合面 244 第一間隔環 341 第二間隔環 342 第三表面 347 第四表面 348 16The second surface 142 is in contact with the second lens U. 133 f? The soil 143 includes the connected first inclined surface 145. * The second inclined surface The angle between the inclined surface 145 and the first surface 141 is an acute angle. The angle between the 6 and the second surface 142 is an acute angle 02. The first oblique 141 = an angle formed between the second inclined surfaces 146. Since the first table "second surface 142 is parallel" and thus the angle Θ is equal to 11 201007240, the angle Θ value ranges from 5 〇 acute angle to acute angle Θ 2, preferably 0 to 90. The outer wall Μ 4 and The contact between the inner wall 143 and the outer wall 144 on the first surface 141 is u, and the distance on the second surface 142 is L2, according to the optical parameters of the first lens 12, The value may be greater than the value of L2, and may be less than or equal to the value of L2. In this embodiment, the value of 'Li is greater than the value of L2. The spacer ring 14 may be integrally formed or assembled. In this embodiment, the interval The ring 14 is formed into a body. The material of the spacer ring 14 is opaque plastic. When the camera module 1 is in operation, most of the incident light passes through the first optical portion 121 and the second portion of the first lens 12 in sequence. The second optical portion 131 of the lens 13 forms an image on the image sensor 3 and is transmitted to the outside by the printed circuit board 40, but there may be a small portion of light passing through the first lens and the first optical portion 121. , will be directed to the inner wall 143 of the spacer ring 14 and reflected. The spacer ring 143 has a first inclined surface 145 and a second inclined surface 146 which are connected to each other. Therefore, a portion of the light that is directed toward the inner wall 143 may be directly scattered or reflected by the second inclined surface 146 to the object side direction. Another portion of the light 143 may first reach the first slope 145, then be scattered or reflected by the first slope 145 to the second slope 146, and then scattered or reflected by the second slope 146 to the object side direction. Thus, the spacer ring 14 The light incident on the inner wall 143 of the spacer ring 14 can be scattered or reflected as far as possible in the object side direction to disperse and attenuate the reflected light which is finally directed toward the image sensor 3 near the image side, thereby avoiding a large amount of reflected light entering the image sense. 12 201007240 Of course, in order to facilitate the manufacture of the molding, the spacer ring can also be divided into a plurality of parts for manufacturing. Please refer to FIG. 3 , which is provided by the second embodiment of the present technical solution. The spacer ring 24 includes a first spacing portion 241 and a second spacing portion 242. The first spacing portion 241 and the second spacing portion 242 are both semi-annular structures. The first spacing portion 241 has a first fit. 243. The second spacer portion 5% has a second mating surface 244 corresponding to the first mating D surface 243. Preferably, the first mating surface 243 and the first mating surface 244 are both inclined. In this embodiment, The angle between the first mating surface 243 and the first surface 245 is an acute angle, and the angle between the first mating surface 243 and the second surface tear is an obtuse angle. The angle of the second mating surface 244 and the first surface (4) is an obtuse angle and is at an angle to the second surface 246. The angle between the first mating surface 243 and the first surface 245 is equal to the second mating surface 244 and the first mating surface 243 and the second mating surface of the first mating surface 243 and the first mating surface The angle between the surfaces 245. Therefore, the first spacing portion 241 and the second spacing portion 242 can be joined to each other by the first mating surface (4) and the second mating surface 244, and the spacer ring 24 can be formed by adhesive bonding or other means of fixing. Referring to Figure 4, the spacer ring 34 provided by the third embodiment of the present technical solution includes a first spacer ring 341盥篦-p 彳 卢 卢 姑 。 〃 衣 342 342. The first spacer ring 341 and the first space _ 342 are both annular. The first spacer ring 341I has a first :=, a third surface 347, and a first slope 345. The second spacer ring Μ the second threshold 348 and the second slope 346. Thus, the one (four) 341 and the second spacer 342 can be joined by the mutual contact of the third surface 347::: face 348, and the spacer ring 34 can be fixed by adhesive bonding or by other means. The angle between the first slope 345 and the second slope tear 13 201007240 is an acute angle. Preferably, the angle between the first inclined surface 345 and the second inclined surface 346 ranges from 50° to 90°. . Of course, when the lens module includes three or more lenses, it may also include two or more spacer rings, so that a spacer ring is disposed between any adjacent two mirrors. Alternatively, the spacer ring may be disposed between the lens and the infrared cut filter. In summary, the spacer ring can be disposed between any two optical elements that generate glare due to reflection to avoid glare formation. Compared with the prior art, the lens module of the present invention has the following advantages: the direct or indirect scattering or reflection of the first bevel and the second bevel of the spacer ring can reflect the light incident on the inner wall of the spacer ring. In the direction of the object side, the dispersion of the reflected light that is finally directed toward the image sensor near the image side is weakened, which can effectively reduce glare and improve the imaging quality of the lens module. In summary, the present invention has indeed met the requirements of the invention patent, and the patent is required in accordance with the law. However, the above is only a preferred embodiment of the present invention. It is not possible to limit the scope of the patent in this case. Equivalent repairs or changes made by persons in accordance with the spirit of the present invention shall be covered by the following patents. [Simplified illustration of the drawing] Figure W is a cross-sectional view of the camera module provided by the first embodiment of the technical solution = 2 is the technical side (four) - the example is provided between the figure 3 and the technology (four) two materials for the supply of Figure 4 A spacer ring provided by the third embodiment of the present technical solution; 14 201007240 FIG. 5 is a cross-sectional view of a camera module in the prior art. [Main component symbol description] . Camera module 1 - Lens module 10 Mirror same 11 First lens 12 Second lens 13 ❹ spacer ring 14, 24, 34 Mirror holder 20 First receiving hole 22 Image sensor 30 Printed circuit Plate 40 cylinder wall 101 second receiving hole 102 ^ light transmitting member L 104 lens cover 111 first optical portion 121 first non-optical portion 122 first abutting surface 123 second abutting surface 124 second optical portion 131 second non Optical portion 132 third abutment surface 133 15 201007240 first surface 141 , 245 , 343 second surface 142 , 246 , 344 inner wall 143 ^ outer wall 144 • first slope 145 , 247 , 345 second slope 146 ' 248 ' 346 a spacer portion 241 a second spacer portion 242 ❹ a first mating surface 243 a second mating surface 244 a first spacer ring 341 a second spacer ring 342 a third surface 347 a fourth surface 348 16