CN102034295A - 一种接触式图像传感器 - Google Patents

一种接触式图像传感器 Download PDF

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CN102034295A
CN102034295A CN2009103053796A CN200910305379A CN102034295A CN 102034295 A CN102034295 A CN 102034295A CN 2009103053796 A CN2009103053796 A CN 2009103053796A CN 200910305379 A CN200910305379 A CN 200910305379A CN 102034295 A CN102034295 A CN 102034295A
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light
ultraviolet
image sensor
type image
led
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CN102034295B (zh
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泽江哲则
刘振翔
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Weihai Hualing Opto Electronics Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H04N1/1017—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components the main-scanning components remaining positionally invariant with respect to one another in the sub-scanning direction
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/121—Apparatus characterised by sensor details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/03—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array
    • H04N1/031—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors
    • H04N1/0313—Direct contact pick-up heads, i.e. heads having no array of elements to project the scanned image elements onto the photodectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/028—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up
    • H04N2201/03—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted
    • H04N2201/031—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted deleted
    • H04N2201/03104—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light source, a lens and a photodetector supported by a single-piece frame
    • H04N2201/03108—Components of integral heads
    • H04N2201/03112—Light source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/028—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up
    • H04N2201/03—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted
    • H04N2201/031—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted deleted
    • H04N2201/03104—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light source, a lens and a photodetector supported by a single-piece frame
    • H04N2201/03108—Components of integral heads
    • H04N2201/03129—Transparent cover or transparent document support mounted on the head

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Planar Illumination Modules (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

本发明涉及图像的读取装置，详细地讲是一种紫外光线性光源为导光体式的接触式图像传感器，设有框架，框架下方设有线路板，线路板上设有光电转换芯片，光电转换芯片上方安装有透镜，透镜侧面设有光源，框架上方设有玻璃板，其特征在于透镜侧面设有由紫外LED、导光体和LED线路板组成的线性光源，紫外LED设在导光体的端部，本发明涉具有低成本、低功耗、高均一性、识别紫外信息感度高等优点。

Description

一种接触式图像传感器
所属技术领域
本发明涉及图像的读取装置，详细地讲是一种紫外光线性光源为导光体式的接触式图像传感器。
背景技术
我们知道，现有的诸如银行系统纸币防伪使用的具有紫外信息识别功能的接触式图像传感器，是在框架下方设有线路板，线路板上设有光电转换芯片，光电转换芯片上方安装有透镜，透镜的侧面设有线性光源，线性光源可以设在透镜的一侧，也可以在透镜的两侧都设有线性光源，框架上方设有搭载原稿的玻璃板，现有技术中透镜一侧或者两侧设有的线性光源中有发射紫外光的线性光源，由于紫外光在普通导光体中传递会严重衰减，紫外光遇到普通反射图形波长会发生改变，所以紫外光线性光源通常是采用紫外LED阵列形式的结构，以避开使用导光体和反射图形带来的紫外光传递衰减和紫外光反射后波长改变的问题，阵列形式紫外光线性光源的缺点是使用紫外LED数量多，成本高、均一性差、功耗大，使用阵列形式紫外光线性光源制作的接触式图像传感器价格用户批量生产很难接受，阵列形式的紫外光线性光源的成本占接触式图像传感器成本要在百分之五十以上，并且光源的均一性靠LED的排列密度来保证，LED密度越大成本越高。
发明内容
本发明的目的是克服现有技术的不足，开发出一种低成本、低功耗、高均一性紫外光线性光源接触式图像传感器。
本发明解决问题所采用的技术方案是：
一种接触式图像传感器，设有框架，框架下方设有线路板，线路板上设有光电转换芯片，光电转换芯片上方安装有透镜，透镜侧面设有光源，框架上方设有玻璃板，其特征在于透镜侧面设有由紫外LED、透光材料制成的导光体和线路板组成的紫外线性光源，紫外LED设在导光体的端部，本发明导光体可以一端设有紫外LED，也可以两端都设有紫外LED。
本发明可以在透镜侧面设有金属导光板，只有金属导光板反射紫外光时不出现紫外光衰减、波长不改变，保证了紫外光在导光体中的均一性和强度。
本发明中的金属导光板罩在导光体上，金属导光板上设有聚光槽，聚光槽可以增强导光体的导光效果。
本发明所说的LED线路板采用PCB印刷线路板，印刷线路板可以是FPC柔性线路板，以降低生产成本。
本发明可以在导光体上设有可以反射紫外光的反射图形，使紫外光反射后不改变波长。
本发明的成本和功耗均为现有阵列形式紫外光线性光源的三分之一以下，并解决了紫外光在传递过程中出现的严重衰减现象，紫外光遇到反射图形波长也不会发生改变，具有成本低廉、功耗低、高均一性等优点。
附图说明：
图1为现有接触式图像传感器俯视示意图。
图2为图1的A-A剖视放大图。
图3为本发明的俯视示意图。
图4为图3的B-B剖视放大图。
图中标记：框架1、光源2、玻璃板3、透镜4、紫外LED5-1、LED线路板5-2、光电转换芯片6、线路板7、导光体5-3、金属导光板5-4。
具体实施方式：
下面结合附图和实施例对本发明作进一步说明。
如图3、图4所示，一种接触式图像传感器，设有框架1，框架1下方设有线路板7，线路板7上设有光电转换芯片6，光电转换芯片6上方安装有透镜4，透镜4侧面设有光源2，框架1上方设有玻璃板3，上述与现有技术相同，属本领域技术人员所应知，此不赘述，本发明的特征在于透镜4侧面设有由紫外LED5-1、LED线路板5-2、导光体5-3和金属导光板5-4组成的紫外线性光源，紫外LED5-1设在导光体5-3的端部，本发明导光体5-3可以一端设有紫外LED5-1，也可以两端都设有紫外LED5-1，本发明中的导光体5-3外设有金属导光板5-4，金属导光板5-4上设有聚光槽，以增强导光体的导光效果，导光体5-3上设有可以反射紫外光的反射图形，使紫外光反射后不改变波长。
本发明所说的导光体5-3可以是玻璃、PC、亚克力等透光材料，也可以是其他耐紫外光老化的透光材料；所使用的导光体材料中可以是含有特殊金属材料以实现紫外光在导光体中传递的材料，也可以是含有其他能够传递紫外光的材料，导光体5-3的截面形状可以是方形、圆形及其他形状，截面可以是实心的也可以是空心的。
本发明所说的金属导光板5-4可以是钢片、铝箔等金属材料，也可以是其他可以反射紫外光能够保证紫外光在导光体通道中传递的不透光材料，金属导光板反射紫外光时不出现紫外光衰减、波长不改变，保证了紫外光在导光体中的均一性和强度。
本发明所说的紫外LED5-1可以是一个也可以是数个，可以是导光体5-3两端设置也可以是导光体5-3一端设置，紫外LED5-1经LED线路板5-2与线路板7相连接。
本发明所说的LED线路板5-2是PCB印刷线路板，印刷线路板可以是FPC柔性线路板，以降低生产成本。
本发明的成本和功耗均为现有阵列形式紫外光线性光源的三分之一以下，并解决了紫外光在传递过程中出现的严重衰减现象，紫外光遇到反射图形波长也不会发生改变，具有成本低廉、功耗低、高均一性等优点。

Claims (5)

1.一种接触式图像传感器，设有框架，框架下方设有线路板，线路板上设有光电转换芯片，光电转换芯片上方安装有透镜，透镜侧面设有光源，框架上方设有玻璃板，其特征在于透镜侧面设有由紫外LED、导光体和LED线路板组成的紫外线性光源，紫外LED设置在导光体的端部。
2.根据权利要求1所述的一种接触式图像传感器，其特征在于透镜侧面设有金属导光板。
3.根据权利要求2所述的一种接触式图像传感器，其特征在于金属导光板罩在导光体上，金属导光板上设有聚光槽。
4.根据权利要求1所述的一种接触式图像传感器，其特征在于LED线路板采用PCB印刷线路板。
5.根据权利要求1所述的一种接触式图像传感器，其特征在于导光体上设有可以反射紫外光的反射图形。
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CN109657655A (zh) * 2019-01-30 2019-04-19 吴长汶 一种五行脸分类方法及存储设备

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Owner name: WEIHAI HUALING OPTO-ELECTRONICS CO., LTD.

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Address after: 264209 Weihai high tech Industrial Development Zone, Shandong Torch Road, No. 159

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