TWI735142B - Vein recognition device - Google Patents

Vein recognition device Download PDF

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TWI735142B
TWI735142B TW109101820A TW109101820A TWI735142B TW I735142 B TWI735142 B TW I735142B TW 109101820 A TW109101820 A TW 109101820A TW 109101820 A TW109101820 A TW 109101820A TW I735142 B TWI735142 B TW I735142B
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hole
recognition device
vein recognition
mask
image sensor
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TW109101820A
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TW202127305A (en
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王世育
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大陸商業成科技（成都）有限公司
大陸商業成光電（深圳）有限公司
英特盛科技股份有限公司
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/145—Illumination specially adapted for pattern recognition, e.g. using gratings
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/147—Details of sensors, e.g. sensor lenses
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/14—Vascular patterns

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  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Artificial Intelligence (AREA)
  • Human Computer Interaction (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Image Input (AREA)

Abstract

A vein recognition device includes: an image sensor having a photosensitive surface; and a mask opposite to and spaced apart from the image sensor. The mask is opaque and defines a plurality of through holes spaced apart from each other to allow light to pass through the plurality of through holes to the photosensitive surface for imaging. The present disclosure achieves pinhole imaging by using a single layer of the mask with through holes, which greatly reduces the imaging distance and enables the vein recognition device to have a thinner thickness.

Description

靜脈識別裝置 Vein recognition device

本發明涉及一種靜脈識別裝置。 The invention relates to a vein recognition device.

手指靜脈識別是依據人類手指中流動的血液可以吸收特定波長的光線，而使用特定波長光線對手指進行照射，可得到手指靜脈的清晰圖像。由於手指靜脈是生物體內部的資訊，具有唯一性和不可複製性，且手指靜脈認證採用活體認證技術，所以安全性非常高。近年來，個人資訊的安全管理工作變得尤為重要，生物識別技術的凸顯價值在銀行、社保、鎖具等領域得到應有而廣泛的關注。指靜脈識別技術利用這一固有的科學特徵，可實現對獲取的影像進行分析、處理，從而得到手指靜脈的生物特徵，再將得到的手指靜脈特徵資訊與事先註冊的手指靜脈特徵進行比對，從而確認服務物件的身份。 Finger vein recognition is based on the fact that blood flowing in a human finger can absorb light of a specific wavelength, and using light of a specific wavelength to irradiate the finger, a clear image of the finger vein can be obtained. Because finger veins are internal information of a living body, they are unique and non-reproducible, and finger vein authentication uses living body authentication technology, so the security is very high. In recent years, the security management of personal information has become particularly important, and the prominent value of biometric technology has received due and extensive attention in the fields of banking, social security, locks, and so on. Finger vein recognition technology uses this inherent scientific feature to analyze and process the acquired images to obtain the biological characteristics of finger veins, and then compare the obtained finger vein feature information with pre-registered finger vein features. In order to confirm the identity of the service object.

習知的一種靜脈識別裝置包括有間隔且相對設置的鏡筒透鏡和物鏡、以及設置在鏡筒透鏡遠離物鏡一側的圖像感測器。鏡筒透鏡和物鏡之間的間隔距離通常設置達到20-460毫米，如此導致靜脈識別裝置的厚度大且體積也較大。 A conventional vein recognition device includes a barrel lens and an objective lens that are spaced apart and opposed to each other, and an image sensor arranged on the side of the barrel lens away from the objective lens. The separation distance between the tube lens and the objective lens is usually set to 20-460 mm, which results in a large thickness and a large volume of the vein recognition device.

鑒於此，有必要提供一種靜脈識別裝置，其厚度較薄。 In view of this, it is necessary to provide a vein recognition device whose thickness is relatively thin.

一種靜脈識別裝置，其包括：圖像感測器，其具有一感光面；以及與所述圖像感測器相對且間隔設置的遮罩，所述遮罩的材質為不透光的，所述遮罩開設有間隔設置的複數通孔以讓光線穿過所述複數通孔達到所述感光面進行成像。 A vein recognition device, comprising: an image sensor having a photosensitive surface; and a mask opposite to the image sensor and arranged at intervals, the material of the mask is opaque, so The mask is provided with a plurality of through holes arranged at intervals to allow light to pass through the plurality of through holes to reach the photosensitive surface for imaging.

相較於習知技術，本發明實施例藉由設置單層的開設有複數通孔的遮罩進行針孔成像，大大縮短了成像距離，使所述靜脈識別裝置具有更薄的厚度，進而具有更小的體積。 Compared with the prior art, the embodiment of the present invention performs pinhole imaging by providing a single-layer mask with a plurality of through holes, which greatly shortens the imaging distance, makes the vein recognition device have a thinner thickness, and has Smaller size.

100:靜脈識別裝置 100: Vein recognition device

10:遮罩 10: Mask

11:通孔 11: Through hole

111:第一內壁 111: first inner wall

113:第二內壁 113: second inner wall

30:圖像感測器 30: Image sensor

31:感光面 31: photosensitive surface

50:封裝殼體 50: Encapsulated shell

501:容置腔 501: accommodating cavity

51:底板 51: bottom plate

53:側板 53: side panel

55:頂板 55: top plate

20:不透光區域 20: opaque area

21:圓形區域 21: circular area

23:附加區域 23: additional area

200:子區域 200: sub-area

201:第一部 201: Part One

202:第二部 202: The second part

圖1是本發明實施例的靜脈識別裝置的剖面示意圖。 Fig. 1 is a schematic cross-sectional view of a vein recognition device according to an embodiment of the present invention.

圖2是一對比例的遮罩的平面示意圖。 Figure 2 is a schematic plan view of a pair of scale masks.

圖3A-圖3U是圖1的遮罩中的通孔的各種形狀示意圖。 3A-3U are schematic diagrams of various shapes of through holes in the mask of FIG. 1.

圖4是圖1的遮罩的通孔的示意圖。 FIG. 4 is a schematic diagram of a through hole of the mask of FIG. 1.

附圖中示出了本發明的實施例，本發明可以藉由多種不同形式實現，而並不應解釋為僅局限於這裡所闡述的實施例。相反，提供這些實施例是為了使本發明更為全面和完整的公開，並使本領域的技術人員更充分地瞭解本發明的範圍。 The accompanying drawings show embodiments of the present invention. The present invention can be implemented in a variety of different forms, and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more comprehensive and complete, and to enable those skilled in the art to fully understand the scope of the present invention.

請參閱圖1，本發明較佳實施方式的靜脈識別裝置100，其包括相對且間隔設置的遮罩10和圖像感測器30。遮罩10上開設有貫穿遮罩10且相互間隔設置的複數通孔11。遮罩10為不透光的，複數通孔11用以讓光線穿過。遮罩10的材質可為不透光的材料，或是遮罩10包括透明的基材(圖 未示)上以及附著在基材上的一層不透光的光阻層(圖未示)。圖像感測器30用以接收複數通孔11透過光並進行成像。 Please refer to FIG. 1, a vein recognition device 100 according to a preferred embodiment of the present invention includes a mask 10 and an image sensor 30 arranged oppositely and spaced apart. The mask 10 is provided with a plurality of through holes 11 penetrating the mask 10 and spaced apart from each other. The mask 10 is opaque, and the plurality of through holes 11 are used to allow light to pass through. The material of the mask 10 may be an opaque material, or the mask 10 may include a transparent substrate (Figure An opaque photoresist layer (not shown) on and attached to the substrate. The image sensor 30 is used for receiving the light transmitted by the plurality of through holes 11 and performing imaging.

使用時，含有靜脈的手指放置在遮罩10遠離圖像感測器30的一側。被手指反射的光穿過複數通孔11進行針孔成像並被圖像感測器30接收。 When in use, the finger containing the vein is placed on the side of the mask 10 away from the image sensor 30. The light reflected by the finger passes through the plurality of through holes 11 to perform pinhole imaging and is received by the image sensor 30.

圖像感測器30可採用本領域現有的CMOS圖像感測器。圖像感測器30是利用光電器件的光電轉換功能。圖像感測器30具有一感光面31，感光面31接收皮下組織等反射回來的光線，感光面31分成複數成像單元(或稱為畫素)，並將成像單元的光信號轉換成與光信號成相應比例關係且可用的電信號。本實施例中，感光面31朝向遮罩10。 The image sensor 30 can be a CMOS image sensor existing in the art. The image sensor 30 utilizes the photoelectric conversion function of the photoelectric device. The image sensor 30 has a photosensitive surface 31, which receives the light reflected by the subcutaneous tissue and the like. The photosensitive surface 31 is divided into a plurality of imaging units (or called pixels), and the light signals of the imaging units are converted into light The signal is a correspondingly proportional and usable electrical signal. In this embodiment, the photosensitive surface 31 faces the mask 10.

如圖1所示，靜脈識別裝置100還包括封裝殼體50。封裝殼體50形成有一容置腔501，遮罩10和圖像感測器30設置在所述容置腔501中。本實施例中，遮罩10和圖像感測器30的間距可為0.1-3毫米，例如0.2毫米。 As shown in FIG. 1, the vein recognition device 100 further includes a packaging casing 50. The packaging shell 50 is formed with an accommodating cavity 501, and the mask 10 and the image sensor 30 are disposed in the accommodating cavity 501. In this embodiment, the distance between the mask 10 and the image sensor 30 may be 0.1-3 mm, for example 0.2 mm.

如圖1所示，封裝殼體50包括底板51和連接底板51的側板53，側板53垂直連接在底板51的周緣。底板51和側板53配合形成容置腔501。本實施例中，圖像感測器30設置在底板51上，遮罩10連接側板53的內壁上。 As shown in FIG. 1, the package housing 50 includes a bottom plate 51 and a side plate 53 connected to the bottom plate 51, and the side plate 53 is vertically connected to the periphery of the bottom plate 51. The bottom plate 51 and the side plate 53 cooperate to form an accommodating cavity 501. In this embodiment, the image sensor 30 is disposed on the bottom plate 51, and the mask 10 is connected to the inner wall of the side plate 53.

可以理解的，靜脈識別裝置100還包括光源(圖未示)，其用以發射特定波長光線對手指進行照射。所述燈源可為近紅外波段的燈。 It is understandable that the vein recognition device 100 further includes a light source (not shown), which is used to emit light of a specific wavelength to illuminate the finger. The lamp source may be a lamp in the near-infrared band.

可以理解的，封裝殼體50還可包括一透光的頂板55，頂板55與底板51相對且間隔設置，遮罩10和圖像感測器30設置在頂板55和底板51之間。 It can be understood that the packaging housing 50 may further include a light-transmissive top plate 55, the top plate 55 and the bottom plate 51 are opposed to and spaced apart, and the mask 10 and the image sensor 30 are disposed between the top plate 55 and the bottom plate 51.

可以理解的，封裝殼體50的內壁上還設置有吸光塗層(圖未示)，以防止光在內壁反射折射導致影響感測結果。 It is understandable that a light-absorbing coating (not shown) is also provided on the inner wall of the packaging shell 50 to prevent reflection and refraction of light on the inner wall from affecting the sensing result.

如圖2所示，遮罩10中的複數通孔11相互間隔排布且為多行多列的矩陣排布，每一個通孔11為圓形。然而，當通孔11的形狀設計成普通的圓形時，則光線穿過所述通孔11時會發生繞射，致使生成的圖像產生光暈現象，造成亮度不均勻。 As shown in FIG. 2, the plurality of through holes 11 in the mask 10 are arranged at intervals and are arranged in a matrix with multiple rows and multiple columns, and each through hole 11 is circular. However, when the shape of the through hole 11 is designed to be a common circle, the light will be diffracted when passing through the through hole 11, resulting in a halo phenomenon in the generated image, resulting in uneven brightness.

為減少光的繞射，平衡針孔成像之整體亮度均勻度，以避免在圖像感測器30成像時，造成影像不清晰，所述通孔11設計為特殊的形狀，如圖3A-圖3U所示，主要是在通孔11的中央設置不透光區域20以減少從通孔11的中央穿過的光量，減少光的繞射。圖3A-圖3U中，通孔11的區域為白色，遮罩10的實體區域呈現為黑色。 In order to reduce the diffraction of light and balance the overall brightness uniformity of the pinhole imaging to avoid unclear images when the image sensor 30 is imaging, the through hole 11 is designed with a special shape, as shown in Figure 3A-Figure As shown in 3U, the opaque area 20 is mainly provided in the center of the through hole 11 to reduce the amount of light passing through the center of the through hole 11 and reduce the diffraction of light. In FIGS. 3A to 3U, the area of the through hole 11 is white, and the solid area of the mask 10 is black.

如圖3A所示，通孔11為環形，通孔11環繞的為不透光區域20。本實施例中，該不透光區域20為圓形，通孔11為圓環形。通孔11由具有弧形的第一內壁111和弧形的第二內壁113，第一內壁111與第二內壁113共同界定了通孔11。 As shown in FIG. 3A, the through hole 11 has a ring shape, and the through hole 11 surrounds the opaque area 20. In this embodiment, the opaque area 20 is circular, and the through hole 11 is circular. The through hole 11 is composed of an arc-shaped first inner wall 111 and an arc-shaped second inner wall 113, and the first inner wall 111 and the second inner wall 113 jointly define the through hole 11.

如圖3B至圖3U所示的各個通孔11均為在圖3A所示的通孔11的基礎上進行了簡單的變形，通孔11的外輪廓大致為圓形，如圖3B為通孔11環繞的不透光區域20為不規則的，不透光區域20包括大致位於通孔11中央的圓形區域21以及連接圓形區域21的附加區域23。附加區域23連接在圓形區域21與通孔11的孔壁之間。圖3B至圖3U所示的通孔11的形狀各不相同，主要是附加區域23的形狀發生變化。可以理解的，附加區域23的形狀不限於圖3B至圖3U所示，還可根據需要進行設計。 The through holes 11 shown in FIGS. 3B to 3U are all simply deformed on the basis of the through hole 11 shown in FIG. 3A, and the outer contour of the through hole 11 is roughly circular, as shown in FIG. 3B for the through hole The opaque area 20 surrounded by 11 is irregular, and the opaque area 20 includes a circular area 21 approximately in the center of the through hole 11 and an additional area 23 connecting the circular area 21. The additional area 23 is connected between the circular area 21 and the hole wall of the through hole 11. The shapes of the through holes 11 shown in FIGS. 3B to 3U are different, and the main reason is that the shape of the additional area 23 changes. It can be understood that the shape of the additional area 23 is not limited to those shown in FIGS. 3B to 3U, and can be designed as required.

如圖4所示，通孔11的外輪廓大致為圓形，所述通孔11中還設置有圖案化的不透光區域20。本實施例中，不透光區域20大致呈花朵圖案，其連接在通孔11的中心以及通孔11的孔壁之間，包括三個子區域200，每一個子區域200連接在通孔11的中心和通孔11的孔壁之間，且三個子區域 200形狀尺寸完全相同且沿通孔11的外輪廓圓周方向等間隔設置。每一個子區域200包括從通孔11中心向通孔11孔壁延伸的第一部201以及位於第一部201兩側的第二部202，第二部202也連接在通孔11中心與通孔11孔壁之間。第一部201和與其相鄰的每一個第二部202均自通孔11中心延伸至通孔11孔壁的不同位置，且延伸過程中，第一部201和與其相鄰的兩個第二部202均為間隔的。本實施例，第一部201的尺寸較第二部202的尺寸更大。 As shown in FIG. 4, the outer contour of the through hole 11 is approximately circular, and a patterned opaque area 20 is also provided in the through hole 11. In this embodiment, the opaque area 20 is roughly a flower pattern, which is connected between the center of the through hole 11 and the wall of the through hole 11, and includes three sub-regions 200, each of which is connected to the through hole 11 Between the center and the hole wall of the through hole 11, and three sub-regions The shape and size of the 200 are completely the same, and they are arranged at equal intervals along the circumferential direction of the outer contour of the through hole 11. Each sub-area 200 includes a first part 201 extending from the center of the through hole 11 to the wall of the through hole 11 and a second part 202 located on both sides of the first part 201. The second part 202 is also connected to the center of the through hole 11 and the through hole. Hole 11 between the wall of the hole. The first part 201 and each adjacent second part 202 extend from the center of the through hole 11 to different positions on the wall of the through hole 11, and during the extension process, the first part 201 and the two adjacent second parts 202 The sections 202 are all spaced. In this embodiment, the size of the first portion 201 is larger than the size of the second portion 202.

可以理解的，遮罩10中開設的複數通孔11的形狀可為相同，也可為各種不同的形狀。各個通孔11的尺寸、相鄰通孔11的間距均可根據需要進行設計。 It can be understood that the shapes of the plurality of through holes 11 opened in the mask 10 can be the same or can be of various different shapes. The size of each through hole 11 and the distance between adjacent through holes 11 can be designed as required.

可以理解的，靜脈識別裝置100可實現懸浮式感測，測試體如手指可不直接接觸靜脈識別裝置100即可實現靜脈識別感測。當然，測試體也可直接接觸靜脈識別裝置100即可實現靜脈識別感測。 It is understandable that the vein recognition device 100 can realize floating-type sensing, and the test subject such as a finger may not directly touch the vein recognition device 100 to realize the vein recognition sensing. Of course, the test subject can also directly contact the vein recognition device 100 to realize vein recognition sensing.

相較於習知技術，本發明實施例藉由設置單層的開設有複數通孔11的遮罩10進行針孔成像，大大縮短了成像距離，使所述靜脈識別裝置100具有更薄的厚度。此外，藉由對遮罩10中的通孔11的形狀進行特殊設計，有效避免針孔成像由於光的繞射導致的影像不清晰的光暈現象。 Compared with the prior art, the embodiment of the present invention performs pinhole imaging by providing a single-layer mask 10 with a plurality of through holes 11, which greatly shortens the imaging distance and makes the vein recognition device 100 have a thinner thickness. . In addition, by specially designing the shape of the through hole 11 in the mask 10, the halo phenomenon of unclear images caused by the diffraction of light in the pinhole imaging can be effectively avoided.

以上實施例僅用以說明本發明的技術方案而非限制，圖示中出現的上、下、左及右方向僅為了方便理解，儘管參照較佳實施例對本發明進行了詳細說明，本領域的普通技術人員應當理解，可以對本發明的技術方案進行修改或等同替換，而不脫離本發明技術方案的精神和範圍。 The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. The up, down, left, and right directions shown in the figures are only for ease of understanding, although the present invention has been described in detail with reference to the preferred embodiments. A person of ordinary skill should understand that the technical solution of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

100:靜脈識別裝置 100: Vein recognition device

10:遮罩 10: Mask

11:通孔 11: Through hole

30:圖像感測器 30: Image sensor

31:感光面 31: photosensitive surface

50:封裝殼體 50: Encapsulated shell

501:容置腔 501: accommodating cavity

51:底板 51: bottom plate

53:側板 53: side panel

55:頂板 55: top plate

Claims (9)

一種靜脈識別裝置，其改良在於，其包括：圖像感測器，其具有一感光面；以及與所述圖像感測器相對且間隔設置的遮罩，所述遮罩為不透光的，所述遮罩開設有間隔設置的複數通孔以讓光線穿過所述複數通孔達到所述感光面進行成像；每一個通孔的外輪廓為圓形，每一個通孔中形成有圖案狀的不透光區域，所述不透光區域連接在通孔的中心以及通孔的孔壁之間。 A vein recognition device, which is improved in that it comprises: an image sensor having a photosensitive surface; and a mask arranged at intervals opposite to the image sensor, the mask being opaque The mask is provided with a plurality of through holes arranged at intervals to allow light to pass through the plurality of through holes to the photosensitive surface for imaging; the outer contour of each through hole is circular, and each through hole is formed with a pattern The opaque area is connected between the center of the through hole and the wall of the through hole. 如請求項1所述的靜脈識別裝置，其中，所述遮罩和所述圖像感測器的間距為0.1-3毫米。 The vein recognition device according to claim 1, wherein the distance between the mask and the image sensor is 0.1-3 mm. 如請求項1所述的靜脈識別裝置，其中，所述複數通孔排布為多行多列的矩陣。 The vein recognition device according to claim 1, wherein the plurality of through holes are arranged in a matrix with multiple rows and multiple columns. 如請求項1所述的靜脈識別裝置，其中，每一個通孔為環形，每一個通孔環繞一不透光區域。 The vein recognition device according to claim 1, wherein each through hole has a ring shape, and each through hole surrounds an opaque area. 如請求項1所述的靜脈識別裝置，其中，每一個通孔的外輪廓為圓形，每一個通孔中形成有不透光區域，所述不透光區域包括位於每一個通孔中央的圓形區域以及連接在所述圓形區域與通孔的孔壁之間的附加區域。 The vein identification device according to claim 1, wherein the outer contour of each through hole is circular, and each through hole is formed with an opaque area, and the opaque area includes a center of each through hole. A circular area and an additional area connected between the circular area and the hole wall of the through hole. 如請求項1所述的靜脈識別裝置，其中，所述不透光區域包括三個子區域，每一個子區域連接在通孔的中心和通孔的孔壁之間，且三個子區域形狀尺寸完全相同且沿通孔的外輪廓圓周方向等間隔設置。 The vein recognition device according to claim 1, wherein the opaque area includes three sub-regions, each sub-region is connected between the center of the through hole and the hole wall of the through hole, and the three sub-regions have complete shapes and sizes. The same and are arranged at equal intervals along the circumferential direction of the outer contour of the through hole. 如請求項6所述的靜脈識別裝置，其中，每一個子區域包括第一部以及位於第一部兩側的第二部，第一部和與其相鄰的每一個第二部均自通孔中心延伸至通孔孔壁的不同位置，且延伸過程中，第一部和與其相鄰的兩個第二部均為間隔的。 The vein recognition device according to claim 6, wherein each sub-area includes a first part and a second part located on both sides of the first part, and the first part and each second part adjacent to the first part are formed from through holes The center extends to different positions on the wall of the through hole, and during the extension process, the first part and the two adjacent second parts are spaced apart. 如請求項1所述的靜脈識別裝置，其中，所述靜脈識別裝置還包括封裝殼體，所述封裝殼體形成有一容置腔，所述遮罩和所述圖像感測器設置在所述容置腔中。 The vein recognition device according to claim 1, wherein the vein recognition device further includes an encapsulation housing, the encapsulation housing is formed with an accommodating cavity, and the mask and the image sensor are arranged in the Mentioned in the accommodating cavity. 如請求項8所述的靜脈識別裝置，其中，封裝殼體包括底板和連接底板的側板，側板垂直連接在底板的周緣，底板和側板配合形成所述容置腔，圖像感測器設置在所述底板上，所述遮罩連接所述側板的內壁上。 The vein identification device according to claim 8, wherein the packaging housing includes a bottom plate and a side plate connected to the bottom plate, the side plate is vertically connected to the periphery of the bottom plate, the bottom plate and the side plate cooperate to form the accommodating cavity, and the image sensor is arranged in On the bottom plate, the shield is connected to the inner wall of the side plate.
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