201224953 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明有關於一種指紋影像擷取裝置，更特別是關於利 用一個非平行的稜鏡且搭配廣角透鏡組之指紋影像指員取 裝置。 【先前技術】 [0002] 指紋影像擷取裝置可概分為光學形式及非光學形式。目 前大部份的指紋影像擷取裝置，係採用光學形式，其— 般應用稜鏡（Prism)、凸透鏡（Convex Lens)以及景ί像 感測器作為主要元件以捕捉指紋影像。 [0003] [0004] 圖1為一種傳統指紋影像擷取裝置1的示意圖。參閱圖^ 來自光源12的光束經由棱鏡14的一邊進入棱鏡14 在稜鏡14内朝向與手指10接觸的斜邊前進，並被手於 的影像反射至稜鏡14的另-邊。光束再經w鏡 至影像感測器18上，接著再進行適當的訊號處理以完‘、:、 指紋辨識的動作。相類似的指紋影像梅取肚 &成 3 衣置也可參閱 歐洲專利EP2039292A1。 為了滅小相双影彳冢彌取聚置的體積，美國專利 US6826000B2揭露一種利用改變稜鏡的 /狀’使指紋景ί 像擷取裝置雜㈣⑽，卜但_缺騎操取裝置 的手指接觸面之面積過大，除了手指放置的區域外，、尚 多餘了許多區域，造成減影像綠I置的體積過大: 再者’ 料不同側，棱鏡的全 反射面下方空間無法，這也是造成指紋影像操取裝 置體積無法縮小的主要因素。 099142468 表單編號Α0101 第4頁/共13頁 0992073704-0 20122495W】 [0005] 為解決上述問題，本發明之目的在於提供一個超小裂的 指紋影像擷取裝置。 [0006] 本發明之另一目的在於提供與上述超小型指紋彩像禅取 裝置搭配的廣角透鏡組。 [0007] 本發明提供一種指紋影像擷取裝置，用以取得/指蘇影 像，包含：一光源，用以發射一光束；—影像感測器’ 用以產生該指紋影像；以及一稜鏡，用以接收該光濾發 ❹ 射之該光束並將該光束反射於碲影像感測器，包含：， 手指接觸面，用以供一使用者的”手指放置且將該光源 之該光束反射；一第一反射面，與該手指接觸面連接且 二者間夾有一夾角0：;以及一第二反射面，與該手指接 觸面連接且二者間夾有一夾角々，其中，該第一反射面 係反射來自該手指接觸面之該光束至該第二反射面，且 該第二反射面係反射來自該第一反射面之全部該光束至 該影像感測器。 Ο [0008] 本發明指紋影像擷取裝置利用上述結構，可有效墙^ 紋影像擷取裝置的體積，而使指紋影像擷取:小札 手機、相機…等電子產品裝置上^ ^應用於 [0009] 【實施方式】 圖2為本發明指紋影像麻裝置2之一實施例之結_ [0010] 參閱圖2，指紋影像擷取裝置2包含一個 鏡24、一個透鏡組26及以—個影像感測器1㈣個棱 指紋綱W編辆、22_—散^施束例 099142468 表草編號删1 ^ 5 I/* 13 S ^92073704-0 201224953 光束進入稜鏡24後，投射於放置於稜鏡24上之手指指紋 的脊線（ridge)和谷線（vaney)，光束於稜鏡24内反射 後進入透鏡組26而聚焦於影像感測器28，形成一個指紋 影像。 [0011] 光源22為一個發散光源，可採用發光二極體（LED)。 [0012] 稜鏡24包含一個手指接觸面241、一個第一反射面242、 一個第二反射面243、以及一個第四面244。稜鏡24設置 的目的係為折疊光源22之光路，以使指紋影像擷取裝置2 的體積縮小，其中當光路拆疊愈多次’則指紋影像擷取 裝置2將可製作的更薄。稜鏡24可為玻璃或塑膠材質製成 〇 [0013] 手指接觸面241用以供一個使用者的一個手指放置且將來 自光源22之光束反射。 [0014] 第一反射面242與手指接觸面241連接，且二者間夾有一 夾角α。夾角α介於23。〜2Ϋ° ’較隹碰為交5°。第一反射 面242係用以反射來自手指接觸面241之光束。 [0015] 第二反射面243與手指接觸面241連接且二者間夾有一夾 角）5。夾角）5介於158°~162°，較佳地為160°。第二反 射面242用以反射來自第一反射面242之光束至影像感測 器28。 [0016] 第四面244與第一反射面242及第二反射面243連接。 [〇〇17] 其中，第一反射面241因為夾角《而使來自手指接觸面 241之光束反射超過手指接觸面241 ’而進入第二反射面 099142468 表單編號Α0101 第6頁/共13頁 0992073704-0 201224953 [0018] [0019] Ο [0020] [0021] ο [0022] [0023] 099142468 243 ’且第二反射面243因為夾角0而使來自第一反射面 242反射之光束全部進入影像感測器28。 再者’本實施例之指紋影像擷取裝置2之手指接觸面241 的面積係近似或等於使用者之手指指紋之範圍。如此， 可使指紋影像擷取裝置2體積減小。 本實施例之指紋影像擷取裝置2之透鏡組26係設置於稜鏡 24的第四面244與影像感測器28間，其為選擇性設置。透 鏡組26用以接收來自第二反射面243反射之所有光束，並 將此光束聚焦於影像感測器28。此透鏡組2 6可為廣角透 鏡’用以接收所有袭自第二反射面243之所有光束。 再者，此透鏡組26可包含至少立透鏡261、262，第一透 鏡261為負曲光度，第二透鏡26 2為正曲光度。透鏡組2 6 的數量並不以二個為限，只要能聚焦來自第二反射面243 之光束於影像感測器28即可。 光源22、透鏡組26及影像感測器28之形式與功能’係與 習知指紋影像擷取裝置相同，在此不詳細說明。 圖3為本發明指紋影像擷取裝置2光源22放置位置之另一 實施例之示意圖。 參閲圖3，光源22設置之位置除了可設置於稜鏡24第四面 244外側，也可以設置於稜鏡24之第一反射面242外側。 當光源22設置於稜鏡24第四面244外側時，光源22發射 之光束係穿過第四面244而進入棱鏡24内。此時，棱鏡24 的第—反射面242外側之空間可充份利用，可有效縮小指 紋影像擷取裝置2之體積。此外，當光源22設置於稜鏡24 表單編號Α0101 第7頁/共13頁 0992073704-0 201224953 之第一反射面242外側時，光源22發射之光束係穿透第一 反射面242而進入棱鏡24内。此時，棱鏡24之第四面244 外側之空間同樣可充份利用，也可效縮小指紋影像擷取 裝置2之體積。 [0024] 本發明指紋影像擷取裝置利用上述結構，可有效縮小指 紋影像擷取裝置的體積，而使指紋影像擷取裝置應用於 手機、相機…等電子產品裝置上。 [0025] 以上所述僅為舉例性，而非為限制性者。任何未脫離本 發明之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 [0026] 圖1為一種傳統指紋影像擷取裝置的示意圖。 圖2為本發明指紋影像擷取裝置之一實施例之結構圖。 圖3為本發明指紋影像擷取裝置光源放置位置之另一實施 例之示意圖。 【主要元件符號說明】 [0027] a 夾角 β 夾角 1 指紋影像擷取裝置 10 手指 12 光源 14 稜鏡 16 凸透鏡 18 影像感測器 2 指紋影像擷取裝 099142468 表單編號A0101 第8頁/共13頁 0992073704-0 201224953 光源 稜鏡 手指接觸面 第一反射面 第二反射面 第四面 透鏡組 第一透鏡 第二透鏡 影像感測器 099142468 表單編號A0101 第9頁/共13頁 0992073704-0201224953 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a fingerprint image capturing device, and more particularly to a fingerprint image finger taking device using a non-parallel 稜鏡 and a wide-angle lens group . [Prior Art] [0002] A fingerprint image capturing device can be roughly classified into an optical form and a non-optical form. Most of the current fingerprint image capture devices are in optical form, and the Prism, Convex Lens, and Vision sensors are used as the main components to capture fingerprint images. 1 is a schematic diagram of a conventional fingerprint image capturing device 1. Referring to the drawing, the light beam from the light source 12 enters the prism 14 via the side of the prism 14 and advances in the crucible 14 toward the oblique side which is in contact with the finger 10, and is reflected by the image of the hand to the other side of the crucible 14. The beam is then mirrored to the image sensor 18, and then the appropriate signal processing is performed to complete the ‘,:, fingerprint recognition action. A similar fingerprint image can also be found in European Patent EP2039292A1. In order to eliminate the volume of the small phase double-collar, the U.S. Patent No. 6826000B2 discloses a finger contact that utilizes the change of the shape/shape to make the fingerprint image capture device (4) (10), but the finger of the riding device is absent. The area of the surface is too large. Except for the area where the finger is placed, there are still many areas that are superfluous, resulting in an excessive volume of the reduced image green I: In addition, the material on the different sides of the prism cannot be under the total reflection surface of the prism, which also causes fingerprint images. The main factor in the operation of the device can not be reduced. 099142468 Form No. Α0101 Page 4 of 13 0992073704-0 20122495W [0005] In order to solve the above problems, an object of the present invention is to provide an ultra-small fingerprint image capturing device. Another object of the present invention is to provide a wide-angle lens group that is matched with the above-described ultra-small fingerprint color image capturing device. [0007] The present invention provides a fingerprint image capturing device for acquiring/referring to a Soviet image, comprising: a light source for emitting a light beam; an image sensor for generating the fingerprint image; and a frame, Receiving the light beam emitted by the optical filter and reflecting the light beam to the image sensor, comprising: a finger contact surface for a user's "finger placement and reflecting the light beam of the light source; a first reflecting surface is connected to the finger contact surface and has an angle 0 therebetween; and a second reflecting surface is connected to the finger contact surface and has an angle 々 therebetween, wherein the first reflection The surface reflects the light beam from the finger contact surface to the second reflective surface, and the second reflective surface reflects all of the light beam from the first reflective surface to the image sensor. [0008] The fingerprint of the present invention The image capturing device utilizes the above structure, and can effectively capture the volume of the image capturing device, and capture the fingerprint image: the electronic device device such as a small mobile phone, a camera, etc. ^^ is applied to [0009] [Embodiment] 2 for this hair [0010] Referring to FIG. 2, the fingerprint image capturing device 2 includes a mirror 24, a lens group 26, and an image sensor 1 (four) rib fingerprint series W Vehicle, 22_-scattering application example 099142468 Table grass number deletion 1 ^ 5 I/* 13 S ^92073704-0 201224953 After the beam enters 稜鏡24, it is projected onto the ridgeline of the finger fingerprint placed on 稜鏡24 (ridge And the valley line (vaney), the light beam is reflected in the crucible 24 and enters the lens group 26 to be focused on the image sensor 28 to form a fingerprint image. [0011] The light source 22 is a divergent light source, and the light emitting diode can be used. [0012] The crucible 24 includes a finger contact surface 241, a first reflective surface 242, a second reflective surface 243, and a fourth surface 244. The crucible 24 is disposed for folding the light source 22 The optical path is such that the volume of the fingerprint image capturing device 2 is reduced, wherein the more the optical path is unraveled, the fingerprint image capturing device 2 can be made thinner. The 稜鏡24 can be made of glass or plastic material [ 0013] The finger contact surface 241 is used for one finger of a user And the light beam from the light source 22 is reflected. [0014] The first reflective surface 242 is connected to the finger contact surface 241 with an angle α therebetween. The angle α is between 23. 2 Ϋ ° '5° compared to the bump The first reflecting surface 242 is for reflecting the light beam from the finger contact surface 241. [0015] The second reflecting surface 243 is connected to the finger contact surface 241 with an included angle therebetween. The angle 5 is between 158°~ 162°, preferably 160°, The second reflecting surface 242 is for reflecting the light beam from the first reflecting surface 242 to the image sensor 28. [0016] The fourth surface 244 is connected to the first reflecting surface 242 and the second reflecting surface 243. [〇〇17] wherein, the first reflecting surface 241 causes the light beam from the finger contact surface 241 to reflect beyond the finger contact surface 241' and enters the second reflecting surface 099142468 because of the angle "Form No. Α0101 Page 6 / Total 13 Page 0992073704- [0019] [0020] [0021] [0022] [0023] [0023] 099142468 243 'and the second reflecting surface 243 because of the angle 0, the light beam reflected from the first reflecting surface 242 all enters the image sensing 28 Furthermore, the area of the finger contact surface 241 of the fingerprint image capturing device 2 of the present embodiment is approximately equal to or equal to the range of the finger fingerprint of the user. In this way, the fingerprint image capturing device 2 can be reduced in volume. The lens group 26 of the fingerprint image capturing device 2 of the present embodiment is disposed between the fourth surface 244 of the cymbal 24 and the image sensor 28, which is selectively disposed. The lens set 26 is adapted to receive all of the light beams reflected from the second reflecting surface 243 and focus the light beams on the image sensor 28. This lens group 26 can be a wide-angle lens 'for receiving all of the light beams from the second reflecting surface 243. Further, the lens group 26 may include at least the vertical lenses 261, 262, the first lens 261 is a negative curvature, and the second lens 26 2 is a positive curvature. The number of lens groups 26 is not limited to two as long as the light beam from the second reflecting surface 243 can be focused on the image sensor 28. The form and function of the light source 22, the lens group 26, and the image sensor 28 are the same as those of the conventional fingerprint image capturing device, and will not be described in detail herein. 3 is a schematic view showing another embodiment of the position where the light source 22 is placed in the fingerprint image capturing device 2 of the present invention. Referring to Fig. 3, the position of the light source 22 may be disposed outside the fourth surface 244 of the crucible 24, or may be disposed outside the first reflecting surface 242 of the crucible 24. When the source 22 is disposed outside of the fourth face 244 of the crucible 24, the beam of light emitted by the source 22 passes through the fourth face 244 and into the prism 24. At this time, the space outside the first reflecting surface 242 of the prism 24 can be fully utilized, and the volume of the fingerprint image capturing device 2 can be effectively reduced. In addition, when the light source 22 is disposed outside the first reflecting surface 242 of the 稜鏡24 Form No. Α0101, page 7 / 13 pages 0992073704-0 201224953, the light beam emitted by the light source 22 penetrates the first reflecting surface 242 and enters the prism 24 . Inside. At this time, the space outside the fourth surface 244 of the prism 24 can also be fully utilized, and the volume of the fingerprint image capturing device 2 can be reduced. [0024] The fingerprint image capturing device of the present invention can effectively reduce the volume of the fingerprint image capturing device by using the above structure, and the fingerprint image capturing device can be applied to electronic device devices such as mobile phones, cameras, and the like. [0025] The foregoing is illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS [0026] FIG. 1 is a schematic diagram of a conventional fingerprint image capturing device. 2 is a structural diagram of an embodiment of a fingerprint image capturing device of the present invention. 3 is a schematic view showing another embodiment of a light source placement position of the fingerprint image capturing device of the present invention. [Main component symbol description] [0027] a Angle β angle 1 Fingerprint image capture device 10 Finger 12 Light source 14 稜鏡16 Convex lens 18 Image sensor 2 Fingerprint image capture device 099142468 Form number A0101 Page 8 of 13 0992073704-0 201224953 Light source 稜鏡 finger contact surface first reflection surface second reflection surface fourth lens group first lens second lens image sensor 099142468 Form No. A0101 Page 9 / Total 13 Page 0992073704-0