JP4123239B2

JP4123239B2 - Image sensor

Info

Publication number: JP4123239B2
Application number: JP2005048783A
Authority: JP
Inventors: 洋長谷川; 直幸時田; 浩延有本
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2005-02-24
Filing date: 2005-02-24
Publication date: 2008-07-23
Anticipated expiration: 2025-02-24
Also published as: JP2006237977A

Description

この発明は、複写機、ファクシミリなどのカラー画像を読み取る画像入力装置に用いられ、特に紙幣等の特殊印刷を施したカラー画像の読み取りにも適したイメージセンサに関する。 The present invention relates to an image sensor that is used in an image input device that reads a color image such as a copying machine or a facsimile, and that is particularly suitable for reading a color image that has been subjected to special printing such as banknotes.

従来のイメージセンサでは、例えば特開平８−７９４４４号公報（特許文献１）や特開２０００−３４９９５７号公報（特許文献２）に記載のものがあった。特許文献１には、その図８において、基板の下面側に光源を配置しその基板の上面側に光電変換素子を配置し、その基板の上方にセルフォック（登録商標）レンズアレを配置している。したがって、光源からの光は基板を通してセルフォックレンズアレを介して原稿に照射されるが、原稿からの反射光は再びセルフォックレンズアレを介して光電変換素子により受光される構成である。また、特許文献２には、その図９において、配線基板上に発光ダイオード（以下、ＬＥＤと称す）と半導体カラーセンサとをフレームによって離隔して配置し、ＬＥＤからの光はプリズム２１によって屈曲されながら原稿に導かれて原稿に照射され、反射された光はロッドレンズアレイを介して半導体カラーセンサにより受光される構成である。 Conventional image sensors include those described in, for example, Japanese Patent Application Laid-Open No. 8-79444 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2000-349957 (Patent Document 2). In Patent Document 1, in FIG. 8, a light source is disposed on the lower surface side of the substrate, a photoelectric conversion element is disposed on the upper surface side of the substrate, and a SELFOC (registered trademark) lens array is disposed above the substrate. Therefore, the light from the light source is irradiated onto the original through the substrate through the Selfoc lens array, but the reflected light from the original is received by the photoelectric conversion element again through the Selfoc lens array. Further, in Patent Document 2, in FIG. 9, a light emitting diode (hereinafter referred to as LED) and a semiconductor color sensor are arranged on a wiring board, separated by a frame, and light from the LED is bent by a prism 21. On the other hand, the light that is guided to the original, irradiated to the original, and reflected is received by the semiconductor color sensor via the rod lens array.

特開平８−７９４４４号公報（第８図）JP-A-8-79444 (FIG. 8)

特開２０００−３４９９５７号公報（第１図）JP 2000-349957 A (FIG. 1)

しかし、特許文献１に記載のものは、前述のように、光源からの光はセルフォックレンズアレを介して原稿に照射される構成であるから、原稿からの反射光は同じセルフォックレンズアレを介して光電変換素子により受光されるため、そのセルフォックレンズアレにおいては原稿からの反射光が通過すると同時に、光源からの入射光も通過するようになるため、光電変換素子による読み取り精度が低下するというという課題があった。また、特許文献２に記載のものは、同一の配線基板にＬＥＤと半導体カラーセンサを設けているので、原稿とＬＥＤとの距離設定の自由度が低いため、原稿の読み取りライン上における光の照度分布を均一にすることが難しいという課題があった。 However, as described in Patent Document 1, since the light from the light source is applied to the original through the Selfoc lens array as described above, the reflected light from the original has the same Selfoc lens array. Since the reflected light from the original passes through the Selfoc lens array, the incident light from the light source also passes through the Selfoc lens array, so that the reading accuracy by the photoelectric conversion element decreases. There was a problem that. Further, in the device described in Patent Document 2, since the LED and the semiconductor color sensor are provided on the same wiring board, the degree of freedom in setting the distance between the document and the LED is low. There was a problem that it was difficult to make the distribution uniform.

この発明は、上記のような課題を解消するためになされたもので、第１の基板にレンズアレイを介して被照射体からの反射光を受光するセンサを設け、前記第１の基板に対して前記レンズアレイと反対側に配置した第２の基板に被照射体を照射する光源を設け、光源から被照射体までの距離を従来よりも長くすることで、被照射体の読み取りライン上における照射分布を均一化した新規なイメージセンサを提供するものである。 The present invention has been made to solve the above-described problems. A sensor for receiving reflected light from an irradiated object is provided on a first substrate via a lens array. A light source for irradiating the object to be irradiated is provided on the second substrate arranged on the opposite side of the lens array, and the distance from the light source to the object to be irradiated is made longer than before, so that the reading line of the object to be irradiated is A novel image sensor with uniform irradiation distribution is provided.

請求項１の発明に係るイメージセンサは、光源と、被照射体からの反射光を収束するレンズアレイと、このレンズアレイにより収束した反射光を光電変換するセンサと、このセンサを設けた第１の基板と、この第１の基板に対して前記レンズアレイ側とは反対側に設けられ、前記光源が設けられた第２の基板と、前記光源からの光を被照射体に照射するように前記光源側から被照射体側に導光する導光体と、前記第１の基板の前記センサが設けられた面の反対側の面と対向する前記第２の基板の面との間に介在し、前記センサにより光電変換された電気信号を前記第１の基板から前記第２の基板に伝達するコネクタとを備え、前記コネクタの介在により前記第１の基板の前記センサが設けられた面の反対側の面と対向する前記第２の基板の面とが離間したことを特徴とするものである。 According to a first aspect of the present invention, an image sensor includes a light source, a lens array that converges reflected light from an irradiated object, a sensor that photoelectrically converts reflected light converged by the lens array, and a first sensor provided with the sensor. and the substrate, this is to the lens array side to the first substrate disposed on the opposite side, a second substrate on which the light source is provided, the light from the light source so as to irradiate the irradiated body It is interposed between the light guide for guiding light from the light source side to the irradiated body side, and the surface of the second substrate facing the surface of the first substrate opposite to the surface on which the sensor is provided. the example Bei and a connector for transmitting to said second substrate electrical signal photoelectrically converted from the first substrate by a sensor, the sensor of the first substrate by interposition of the connector face of the provided The surface of the second substrate facing the opposite surface There is characterized in that the spaced apart.

請求項２の発明に係るイメージセンサは、光源と、被照射体からの反射光を収束するレンズアレイと、このレンズアレイにより収束した反射光を光電変換するセンサと、このセンサを設けた第１の基板と、この第１の基板に対して前記レンズアレイ側とは反対側に設けられた第２の基板と、前記光源からの光を被照射体に照射するように前記光源側から被照射体側に導光する導光体と、この導光体と前記第２の基板との間に保持され、前記第１の基板に対して前記レンズアレイ側とは反対側に設けられ、前記光源が設けられた第３の基板と、前記第１の基板の前記センサが設けられた面の反対側の面と対向する前記第２の基板の面との間に介在し、前記センサにより光電変換された電気信号を前記第１の基板から前記第２の基板に伝達するコネクタとを備え、前記コネクタの介在により前記第１の基板の前記センサが設けられた面の反対側の面と対向する前記第２の基板の面とが離間したことを特徴とするものである。 According to a second aspect of the present invention, an image sensor includes a light source, a lens array that converges reflected light from an irradiated object, a sensor that photoelectrically converts reflected light converged by the lens array, and a first sensor provided with the sensor. and the substrate, the irradiated a second substrate provided on the side opposite to the lens array side with respect to the first substrate, the light from the light source from the light source side so as to irradiate the irradiated body A light guide that guides light to a body side, the light guide that is held between the light guide and the second substrate, provided on the opposite side of the lens array side with respect to the first substrate, and the light source It is interposed between the third substrate provided and the surface of the second substrate opposite to the surface of the first substrate opposite to the surface provided with the sensor, and is subjected to photoelectric conversion by the sensor. The electrical signal transmitted from the first substrate to the second substrate. A Kuta, is characterized in that the surface of the second substrate opposite to a surface opposite to the surface in which the sensor of the first substrate is provided by the interposition of the connector are separated from each other .

請求項３の発明に係るイメージセンサは、光源と、被照射体からの反射光を収束するレンズアレイと、このレンズアレイにより収束した反射光を光電変換するセンサと、このセンサを設けた第１の基板と、この第１の基板及び前記レンズアレイを保持し、前記センサをその内部に封止する第１のフレームと、前記第１の基板に対して前記レンズアレイ側と反対側に設けられ、前記光源が設けられた第２の基板と、この第２の基板を保持し、前記第１のフレームの外側に設けられた第２のフレームと、この第２のフレームの内側であって、前記第１のフレームの外側に設けられ、前記光源からの光を被照射体に照射するように前記光源側から被照射体側に導光する導光体と、前記第１の基板の前記センサが設けられた面の反対側の面と対向する前記第２の基板の面との間に介在し、前記センサにより光電変換された電気信号を前記第１の基板から前記第２の基板に伝達するコネクタとを備え、前記コネクタの介在により前記第１の基板の前記センサが設けられた面の反対側の面と対向する前記第２の基板の面とが離間したことを特徴とするものである。 According to a third aspect of the present invention, there is provided an image sensor comprising: a light source ; a lens array for converging the reflected light from the irradiated object; a sensor for photoelectrically converting the reflected light converged by the lens array; A first frame that holds the first substrate and the lens array and seals the sensor therein, and is provided on the side opposite to the lens array side with respect to the first substrate. a second substrate on which the light source is provided to hold the second substrate, and a second frame provided outside the first frame, an inner of the second frame, provided outside the first frame, a light guide body for guiding the irradiated side of the light source side so as to irradiate light to the irradiated body from said light source, said sensor of said first substrate Opposite the surface opposite to the provided surface Interposed between the serial surface of the second substrate, and a connector for transmitting an electric signal converted photoelectrically from the first substrate to the second substrate by said sensor, said by interposition of said connector first The surface of the second substrate opposite to the surface of the first substrate on which the sensor is provided is separated from the surface of the second substrate .

請求項４の発明に係るイメージセンサは、光源と、被照射体からの反射光を収束するレンズアレイと、このレンズアレイにより収束した反射光を光電変換するセンサと、このセンサを設けた第１の基板と、この第１の基板及び前記レンズアレイを保持し、前記センサをその内部に封止する第１のフレームと、前記第１の基板に対して前記レンズアレイ側と反対側に設けられた第２の基板と、この第２の基板を保持し、前記第１のフレームの外側に設けられた第２のフレームと、この第２のフレームの内側であって、前記第１のフレームの外側に設けられ、前記光源からの光を被照射体に照射するように前記光源側から被照射体側に導光する導光体と、この導光体と前記第２の基板との間に保持され、前記第１の基板に対して前記レンズアレイ側とは反対側に設けられ、前記光源が設けられた第３の基板と、前記第１の基板の前記センサが設けられた面の反対側の面と対向する前記第２の基板の面との間に介在し、前記センサにより光電変換された電気信号を前記第１の基板から前記第２の基板に伝達するコネクタとを備え、前記コネクタの介在により前記第１の基板の前記センサが設けられた面の反対側の面と対向する前記第２の基板の面とが離間したことを特徴とするものである。 According to a fourth aspect of the present invention, there is provided an image sensor comprising: a light source ; a lens array that converges the reflected light from the irradiated object; a sensor that photoelectrically converts the reflected light converged by the lens array; A first frame that holds the first substrate and the lens array and seals the sensor therein, and is provided on the side opposite to the lens array side with respect to the first substrate. and a second substrate, and holding the second substrate, and a second frame provided outside the first frame, an inner of the second frame, the first frame A light guide that is provided outside and guides light from the light source to the irradiated body side so as to irradiate the irradiated body with light from the light source, and is held between the light guide and the second substrate The lens array with respect to the first substrate And a surface of the second substrate opposite to the surface of the first substrate opposite to the surface on which the sensor is provided. And a connector for transmitting an electrical signal photoelectrically converted by the sensor from the first substrate to the second substrate, and the sensor of the first substrate is provided by the connector. The surface of the second substrate facing the surface opposite to the opposite surface is spaced apart .

請求項５の発明に係るイメージセンサは、前記第１のフレームは、前記第２のフレーム若しくは前記第２の基板に設けられた位置決め部に支持される請求項３又は４に記載のものである。 An image sensor according to a fifth aspect of the present invention is the image sensor according to the third or fourth aspect , wherein the first frame is supported by a positioning portion provided on the second frame or the second substrate. .

以上のように、請求項１〜５に係る発明によれば、第１の基板にレンズアレイを介して被照射体からの反射光を受光するセンサを設け、前記第１の基板に対して前記レンズアレイと反対側に配置した第２の基板又は第３の基板に被照射体を照射する光源を設け、光源から被照射体までの距離を従来よりも長くすることで、被照射体の読み取りライン上における照射分布を均一化することができる。 As described above, according to the first to fifth aspects of the present invention, the first substrate is provided with the sensor that receives the reflected light from the irradiated object via the lens array, and the first substrate is provided with the sensor. Reading the irradiated object by providing a light source for irradiating the irradiated object on the second substrate or the third substrate arranged on the opposite side of the lens array and making the distance from the light source to the irradiated object longer than before. The irradiation distribution on the line can be made uniform.

請求項３〜５に係る発明によれば、さらに、被照射体の読み取りライン上における照射分布を均一化することができるのみならず、第２のフレームの内側であって、第１のフレームの外側に設けられ、光源からの光を被照射体に照射するように光源側から被照射体側に導光する導光体を設けたので、この導光体の配置が容易となる。

According to the invention according to claim 3-5, in addition, not only it can be made uniform illumination distribution on the reading line of the irradiated body, an inner of the second frame, the first frame Since the light guide that guides light from the light source to the irradiated body side is provided so as to irradiate the irradiated body with light from the light source, the arrangement of the light guide is facilitated.

実施の形態１．
以下、この発明の実施の形態１について図１及び図２を用いて説明する。図１は、実施の形態１によるイメージセンサの副走査方向における断面図であり、図１において、１はＬＥＤを並べたＬＥＤ列や蛍光灯などの光源、２は光源１から入射した光が、主走査方向（長軸方向）に渡り全反射を繰返して伝搬・放出する導光体（光源が紫外線を発光する場合は、蛍光体を塗布して紫外線を可視光に変換する）、２ａは導光体２内の光を外部に照射する導光体２の射出部、３は被写体としての原稿、４は原稿３からの反射光を収束するレンズアレイ、５はレンズアレイ４で収束された光を受光して光電変換するセンサ（撮像素子・受光素子）、６はセンサ５を（複数個）配列したセンサ基板、７は原稿台又は原稿搬送路としての透過体（ガラス板）、８はレンズアレイ４やセンサ基板９を保持する第１フレーム、９は光源１を設けた光源用基板、１０は導光体２と光源用基板９とを保持して第１フレーム８の外側に設けられた第２フレーム、１１は第２フレーム１０の内側でセンサ基板６と光源用基板９との間に介在し、センサ５により光電変換した電気信号を光源用基板９に伝達するコネクタ、１２は光源用基板９に設けられ、コネクタ１１から伝達された電気信号を信号処理する信号処理回路、１３は光源用基板９に設けられて信号処理回路１２により処理された信号を外部に取り出す外部コネクタ、１４は第２フレーム１０若しくは光源用基板９に設けられて第１フレーム８を支持し、第２フレーム１０に対して第１フレーム８の位置を決める位置決め部である。また、原稿３を搬送するプーリー（図示せず）や原稿３の搬送経路の一部を形成する天板（図示せず）はイメージセンサには通常組み込まれない。また、光源１及び導光体は、図１に示すように、センサ５やレンズアレイ４等の両側にそれぞれ設け、ともに原稿３の照射点に照射する。 Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view of the image sensor according to Embodiment 1 in the sub-scanning direction. In FIG. 1, 1 is a light source such as an LED array in which LEDs are arranged or a fluorescent lamp, and 2 is light incident from the light source 1. A light guide that repeatedly propagates and emits total reflection in the main scanning direction (major axis direction) (if the light source emits ultraviolet light, the phosphor is applied to convert the ultraviolet light into visible light), 2a is guided An exit part of the light guide 2 that irradiates light inside the light body 2 to the outside, 3 is a document as a subject, 4 is a lens array that converges reflected light from the document 3, and 5 is light converged by the lens array 4 Is a sensor substrate on which a plurality of sensors 5 are arranged, 7 is a transmission plate (glass plate) as a document table or document conveyance path, and 8 is a lens. The first frame 9 for holding the array 4 and the sensor substrate 9 is The light source substrate provided with the source 1, 10 is a second frame provided outside the first frame 8 holding the light guide 2 and the light source substrate 9, and 11 is a sensor substrate inside the second frame 10. 6 and a light source substrate 9, a connector for transmitting an electrical signal photoelectrically converted by the sensor 5 to the light source substrate 9, 12 is provided on the light source substrate 9, and the electrical signal transmitted from the connector 11 is transmitted to the light source substrate 9. A signal processing circuit for signal processing, 13 is an external connector provided on the light source substrate 9 and extracts a signal processed by the signal processing circuit 12 to the outside, and 14 is provided on the second frame 10 or the light source substrate 9 for the first. The positioning unit supports the frame 8 and determines the position of the first frame 8 with respect to the second frame 10. In addition, a pulley (not shown) that conveys the document 3 and a top plate (not shown) that forms a part of the conveyance path of the document 3 are not normally incorporated in the image sensor. As shown in FIG. 1, the light source 1 and the light guide are provided on both sides of the sensor 5, the lens array 4, and the like, and both irradiate the irradiation point of the document 3.

図２は、実施の形態１によるイメージセンサ光源の相対照明強度図（光源がＬＥＤの場合）であり、図２（ａ）はイメージセンサが主走査方向集光時の光分布図、図２（ｂ）はイメージセンサが副走査方向集光時の光分布図である。図中、同一符号は、同一又は相当部分を示しそれらについての詳細な説明は省略する。 2 is a relative illumination intensity diagram of the image sensor light source according to Embodiment 1 (when the light source is an LED), and FIG. 2A is a light distribution diagram when the image sensor is condensed in the main scanning direction. b) is a light distribution diagram when the image sensor is condensed in the sub-scanning direction. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

次に動作について説明する。光源１には電源供給用のリード線（図示せず）が接続され、通常はコネクタ１１などの端子（図示せず）に接続し、端子から低電圧源が供給され、光源１はパルス又はＤＣ駆動する。光源１から放射された光は導光体３内部で全反射を繰り返しながらイメージセンサの主走査方向に進行し、射出部２ａから原稿３に照射される。原稿３で散乱した光の一部はレンズアレイ４で収束し、センサ５で結像する。センサ５により光電変換した電気信号をコネクタ１１より光源用基板９に伝達し、光源用基板９に設けられた信号処理回路１２が伝達された電気信号を信号処理する。信号処理回路１２により処理された信号は、外部コネクタ１３を介して外部に取り出される。 Next, the operation will be described. A lead wire (not shown) for power supply is connected to the light source 1 and is usually connected to a terminal (not shown) such as a connector 11 and a low voltage source is supplied from the terminal. To drive. The light emitted from the light source 1 travels in the main scanning direction of the image sensor while repeating total reflection inside the light guide 3, and is irradiated onto the document 3 from the emission unit 2 a. A part of the light scattered by the document 3 is converged by the lens array 4 and imaged by the sensor 5. The electrical signal photoelectrically converted by the sensor 5 is transmitted from the connector 11 to the light source substrate 9, and the signal processing circuit 12 provided on the light source substrate 9 performs signal processing. The signal processed by the signal processing circuit 12 is taken out via the external connector 13.

また、レンズアレイ４やセンサ基板９を保持する第１フレーム８と、光源１を保持する第２フレーム１０とが別々に設けられており、イメージセンサ内で封止する部材の数の減少し、センサ５とセンサ基板６の封止工程が簡略化されるだけでなく、光源１から被写体としての原稿３への距離（照明距離）が、任意に設定することも可能になるので、光源１がＬＥＤなどの点光源をライン状に並べられたライン光源である場合でも、均一な光分布を容易に得ることができ、原稿３に照射される光に斑（むら）が極めて少なくなる。さらに、光源１がライン光源ではなく、発生する熱量が大きい光源である場合でも、他の回路に熱の影響を与えないようにイメージセンサを設計することが可能である。導光体２を用いているので光源１の配置に自由が高く、イメージセンサの副走査方向の小型化が可能となり、原稿３が大型である場合にも有用である。 In addition, the first frame 8 that holds the lens array 4 and the sensor substrate 9 and the second frame 10 that holds the light source 1 are provided separately, and the number of members sealed in the image sensor is reduced. Not only the sealing process of the sensor 5 and the sensor substrate 6 is simplified, but also the distance (illumination distance) from the light source 1 to the document 3 as a subject can be arbitrarily set. Even in the case of a line light source in which point light sources such as LEDs are arranged in a line, a uniform light distribution can be easily obtained, and unevenness (unevenness) in the light irradiated on the document 3 is extremely reduced. Furthermore, even when the light source 1 is not a line light source but a light source that generates a large amount of heat, it is possible to design an image sensor so that other circuits are not affected by heat. Since the light guide 2 is used, the arrangement of the light source 1 is high, the image sensor can be downsized in the sub-scanning direction, and is useful even when the document 3 is large.

ここで、ＬＥＤ列（ライン光源）が、照明距離の設定により原稿３に照射される光の分布が均一になることを説明する。図２は、ＬＥＤ列の各ＬＥＤ間のピッチ（間隔）が１０ｍｍ，ＬＥＤ光球面放射１／ｒ２で、照明距離が５ｍｍ（照明距離Ａ）と２０ｍｍ（照明距離Ｂ）のときにおける相対照明強度を示している。図２（ａ）は、主走査方向集光時であり、図２（ｂ）は、副走査方向集光時である。図２（ａ）の上方の図からＬＥＤ列の各ＬＥＤが球面放射で発光し、照明距離から長くなればなるほど、隣り合うＬＥＤの球面放射の半径が大きくなるので円弧が重なり合い、光分布が均一になることが分かる。また、主走査方向集光時では、照明距離Ａでは光分布のばらつきが１０％にも至るが、照明距離Ｂでは光分布のばらつきが１％以下になり、副走査方向集光時では、照明距離Ａでは光分布のばらつきが２％、照明距離Ｂでは光分布のばらつきが、ほぼ無くなるので、照明距離の設定により原稿３に照射される光の分布が均一になることが分かる。なお、相対照明強度の距離による減衰は、光源１と原稿３（射出部２ａ）との間に導光体２を設けており、実用上、相対照明強度の減衰の問題はない。 Here, it will be described that the LED array (line light source) has a uniform distribution of light applied to the document 3 by setting the illumination distance. FIG. 2 shows the relative illumination intensity when the pitch (interval) between the LEDs in the LED array is 10 mm, the LED light spherical radiation is 1 / r2, and the illumination distance is 5 mm (illumination distance A) and 20 mm (illumination distance B). Show. FIG. 2A shows the time of condensing in the main scanning direction, and FIG. 2B shows the time of condensing in the sub-scanning direction. As shown in the upper diagram of FIG. 2A, each LED in the LED array emits light by spherical radiation, and the longer the illumination distance, the larger the radius of the spherical radiation of the adjacent LEDs, so that the arcs overlap and the light distribution is uniform. I understand that Further, when the light is condensed in the main scanning direction, the variation in the light distribution reaches 10% at the illumination distance A, but the variation in the light distribution is 1% or less at the illumination distance B, and when the light is condensed in the sub scanning direction. Since the variation in the light distribution is 2% at the distance A and the variation in the light distribution is almost eliminated at the illumination distance B, it can be seen that the distribution of the light applied to the document 3 becomes uniform by setting the illumination distance. The relative illumination intensity is attenuated by the distance because the light guide 2 is provided between the light source 1 and the document 3 (the emission part 2a), and there is practically no problem of attenuation of the relative illumination intensity.

実施の形態２．
この発明の実施の形態２について図３及び図４を用いて説明する。図３は、実施の形態２によるイメージセンサの副走査方向の断面図であり、図４は、実施の形態２によるイメージセンサの副走査方向の断面斜視図である。図中、同一符号は、同一又は相当部分を示しそれらについての詳細な説明は省略する。図３及び図４のように、レンズアレイ４の主走査方向に沿った両端部側に導光体２を設けた両灯光源構造でも、実施の形態１の片灯光源構造と同じ効果を奏する。 Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. 3 is a cross-sectional view of the image sensor according to the second embodiment in the sub-scanning direction, and FIG. 4 is a cross-sectional perspective view of the image sensor according to the second embodiment in the sub-scanning direction. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. As shown in FIGS. 3 and 4, the dual-lamp light source structure in which the light guides 2 are provided on both end sides along the main scanning direction of the lens array 4 has the same effect as the single-lamp light source structure of the first embodiment. .

実施の形態３．
この発明の実施の形態２について図５を用いて説明する。図５は、実施の形態３によるイメージセンサの光源交換説明図であり、図５において、１５は外部コネクタ１３に接続された光源用電源供給端子、１６はＬＥＤ列や光源用電源供給端子１５が設けられた独立光源用基板、１７は信号処理回路１２や外部コネクタ１３が設けられた基板、１８は独立光源用基板１６を支持し、導光体２に対して光源１の位置を決める光源用位置決め部である。図中、同一符号は、同一又は相当部分を示しそれらについての詳細な説明は省略する。図５のように光源１用の独立光源用基板１６と信号処理回路１２や外部コネクタ１３用の基板１７を独立に設けたことにより、光源１のみを容易に交換することが可能となる。また、光源１がＬＥＤ以外の光源や片灯光源構造の場合でも適用できることはいうまでもない。 Embodiment 3 FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 5 is an explanatory diagram of light source replacement of the image sensor according to the third embodiment. In FIG. 5, 15 is a light source power supply terminal connected to the external connector 13, and 16 is an LED array or a light source power supply terminal 15. An independent light source substrate 17 is provided, a substrate 17 is provided with the signal processing circuit 12 and the external connector 13, and 18 is a light source that supports the independent light source substrate 16 and determines the position of the light source 1 relative to the light guide 2 It is a positioning part. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. As shown in FIG. 5, the independent light source substrate 16 for the light source 1 and the substrate 17 for the signal processing circuit 12 and the external connector 13 are provided independently, so that only the light source 1 can be easily replaced. Needless to say, the present invention can be applied even when the light source 1 has a light source other than an LED or a single lamp light source structure.

この発明の実施の形態１によるイメージセンサの副走査方向の断面図である。It is sectional drawing of the subscanning direction of the image sensor by Embodiment 1 of this invention. この発明の実施の形態１によるイメージセンサ光源の相対照明強度図である。It is a relative illumination intensity figure of the image sensor light source by Embodiment 1 of this invention. この発明の実施の形態２によるイメージセンサの副走査方向の断面図である。It is sectional drawing of the subscanning direction of the image sensor by Embodiment 2 of this invention. この発明の実施の形態２によるイメージセンサの副走査方向の断面斜視図である。It is a cross-sectional perspective view of the image sensor by Embodiment 2 of this invention in the subscanning direction. この発明の実施の形態３によるイメージセンサの光源交換説明図である。It is light source replacement explanatory drawing of the image sensor by Embodiment 3 of this invention.

Explanation of symbols

１…光源２…導光体２ａ…射出部３…原稿４…レンズアレイ５…センサ
６…センサ基板７…透過体８…第１フレーム９…光源用基板１０…第２フレーム
１１…コネクタ１２…信号処理回路１３…外部コネクタ１４…位置決め部
１５…光源用電源供給端子１６…独立光源用基板１７…基板１８…光源用位置決め部

DESCRIPTION OF SYMBOLS 1 ... Light source 2 ... Light guide 2a ... Ejection part 3 ... Document 4 ... Lens array 5 ... Sensor 6 ... Sensor substrate 7 ... Transmitter 8 ... 1st frame 9 ... Light source substrate 10 ... 2nd frame 11 ... Connector 12 ... Signal processing circuit 13 ... External connector 14 ... Positioning part 15 ... Power supply terminal for light source 16 ... Substrate for independent light source 17 ... Substrate 18 ... Positioning part for light source

Claims

A light source, a lens array for converging the reflected light from the irradiated object, a sensor for photoelectrically converting the reflected light converged by the lens array, a first substrate provided with the sensor, and the first substrate wherein the lens array side provided on the opposite side to the light guide and a second substrate on which the light source is provided, the light from the light source to the illuminated side of the light source side so as to irradiate the irradiated body Te An electrical signal that is interposed between the light guide and the surface of the second substrate opposite to the surface of the first substrate opposite to the surface on which the sensor is provided, and is subjected to photoelectric conversion by the sensor. the Bei example a connector from the first substrate to transmit to said second substrate, said connector mediated by the surface on which the sensor is provided in the first substrate opposite to the surface opposite the second of image cell, characterized in that the surface of the substrate are separated from each other Support.

And a light source, a lens array for converging light reflected from the irradiated object, a sensor for photoelectrically converting reflected light converged by the lens array, a first substrate provided with the sensor, to the first substrate the the second substrate, a light guide body for guiding the irradiated side of the light from the light source side so as to irradiate the irradiated body from the light source provided on the side opposite to the lens array side Te, the A third substrate held between a light guide and the second substrate, provided on the opposite side of the lens array side with respect to the first substrate, and provided with the light source; An electric signal that is interposed between the surface of the second substrate opposite to the surface of the first substrate opposite to the surface on which the sensor is provided and photoelectrically converted by the sensor from the first substrate to the second substrate; and a connector that transmits to the second substrate, the intervention of the connector An image sensor, characterized in that the surface of the second substrate on which the sensor of the first substrate faces the surface opposite to the surface in which is provided is separated.

A light source ; a lens array for converging the reflected light from the irradiated object; a sensor for photoelectrically converting the reflected light converged by the lens array; a first substrate provided with the sensor; the first substrate; A first frame that holds the lens array and seals the sensor therein, and a second substrate that is provided on the opposite side of the lens array side with respect to the first substrate and is provided with the light source When, holding the second substrate, and a second frame provided outside the first frame, an inner of the second frame, provided outside of the first frame, A light guide that guides light from the light source to the irradiated body so as to irradiate the irradiated body with light from the light source, and a surface opposite to the surface on which the sensor of the first substrate is provided to interposed between the second surface of the substrate, the And a connector that transmits to the second substrate an electrical signal photoelectrically converted from the first substrate by capacitors, opposite to the surface where the sensor of the first substrate is provided by the interposition of the connector An image sensor, wherein a surface of the second substrate facing the surface is separated .

A light source ; a lens array for converging the reflected light from the irradiated object; a sensor for photoelectrically converting the reflected light converged by the lens array; a first substrate provided with the sensor; the first substrate; lens holding the array, a first frame for sealing the sensor therein, and the first of said lens array side of the substrate and a second substrate provided on the opposite side, of the second A second frame that holds the substrate and is provided outside the first frame, and is provided inside the second frame and outside the first frame, and emits light from the light source. A light guide that guides light from the light source side to the irradiated body side so as to irradiate the irradiated body, and is held between the light guide and the second substrate, with respect to the first substrate. Provided on the opposite side of the lens array side and provided with the light source A third substrate that is interposed between the opposite side of the surface opposite the surface of said second substrate of said surface sensor is provided in the first substrate, photoelectrically converted by the sensor A connector for transmitting an electrical signal from the first substrate to the second substrate, and the first substrate facing the surface opposite to the surface on which the sensor is provided of the first substrate through the connector. An image sensor characterized in that the surface of the substrate is spaced apart .

The image sensor according to claim 3 or 4, wherein the first frame is supported by a positioning portion provided on the second frame or the second substrate .