JP2002190919A - Contact type imaging apparatus - Google Patents
Contact type imaging apparatusInfo
- Publication number
- JP2002190919A JP2002190919A JP2000388959A JP2000388959A JP2002190919A JP 2002190919 A JP2002190919 A JP 2002190919A JP 2000388959 A JP2000388959 A JP 2000388959A JP 2000388959 A JP2000388959 A JP 2000388959A JP 2002190919 A JP2002190919 A JP 2002190919A
- Authority
- JP
- Japan
- Prior art keywords
- light
- lens
- contact
- light source
- type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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- Image Input (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は密着形撮像装置（密
着形イメージセンサモジュール）に係り、さらに詳しく
は電子複写機やファクシミリなどの原稿読み取りに適す
る密着形撮像装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact type image pickup device (contact type image sensor module), and more particularly, to a contact type image pickup device suitable for reading an original such as an electronic copying machine or a facsimile.
【０００２】[0002]
【従来の技術】周知のように、いわゆるＯＡ化の推進に
伴って、たとえば電子複写機やファクシミリなどが広く
普及している。図３は、ファクシミリの原稿読み取り機
構部の概略構成を説明するための分解斜視図である。2. Description of the Related Art As is well known, electronic copiers, facsimile machines and the like have become widespread with the promotion of OA. FIG. 3 is an exploded perspective view for explaining a schematic configuration of a document reading mechanism of the facsimile.
【０００３】図３において、１は図示を省略した透光性
板上に載置される被撮像体（原稿）、２は前記被撮像体
１面に一方の面が対峙して被撮像体の光像を通すレン
ズ、３は前記レンズ２の他方の面に対峙して配置装着さ
れ、被撮像体１の光像を撮像するＣＣＤ素子、４は前記
レンズ２の一方の面が対峙する被撮像体１面を光照射す
る光源、５は前記ＣＣＤ素子３の出力を増幅するアン
プ、６は画像処理部（ＬＳＩ）、７はモデムである。こ
こで、照射光源４としては、従来、冷陰極水銀蛍光ラン
プ、冷陰極希ガス蛍光ランプ、発光ダイオードアレイ方
式、あるいは発光ダイオード導光方式が使用されてい
る。In FIG. 3, reference numeral 1 denotes an object to be imaged (original) placed on a light-transmitting plate (not shown), and 2 denotes an object to be imaged whose one surface faces the surface of the object to be imaged. A lens 3 for transmitting an optical image is disposed and mounted facing the other surface of the lens 2, and a CCD element for capturing an optical image of the object 1, and an image pickup device 4 for which one surface of the lens 2 faces A light source 5 for irradiating the body 1 with light, 5 is an amplifier for amplifying the output of the CCD element 3, 6 is an image processing unit (LSI), and 7 is a modem. Here, as the irradiation light source 4, a cold cathode mercury fluorescent lamp, a cold cathode rare gas fluorescent lamp, a light emitting diode array system, or a light emitting diode light guiding system has been used.
【０００４】なお、上記光源４は、いずれの場合も密着
形撮像装置自体、あるいは組み込んだシステムのコンパ
クト化を考慮して細径化などが要求されており、蛍光ラ
ンプにおいては、外径８ｍｍが主流となっている。ま
た、レンズ２、ＣＣＤ素子３および光源４は、対峙する
被撮像体１の進行方向（矢印）を長さとする場合、その
幅方向に匹敵する長さに設定される。In any case, the light source 4 is required to be reduced in diameter in consideration of the compactness of the contact-type imaging device itself or the system in which the light source 4 is incorporated, and the fluorescent lamp has an outer diameter of 8 mm. It has become mainstream. When the length of the lens 2, the CCD element 3, and the light source 4 is set in the traveling direction (arrow) of the object 1 facing the object, the length is set to be comparable to the width direction.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記、従来の
密着形撮像装置の場合、被撮像体１を光照射する光源４
自体の特性によって、実用上、次のような不都合が認め
られる。先ず、冷陰極水銀蛍光ランプを光源４とした密
着形撮像装置では、点灯初期の光出力立ち上がり特性が
悪く、光量が安定するまでの待機時間を設定しなければ
ならない。また、封装された電極近傍の発光管面温度が
１００℃程度を超えるため、ＣＣＤ素子３の性能に悪影
響を与えるだけでなく、密着形撮像装置の筐体などに対
する温度対策を要する。However, in the case of the above-mentioned conventional contact-type imaging device, the light source 4 for irradiating the object 1 with light.
The following inconveniences are practically recognized due to the characteristics of itself. First, in the contact type imaging device using the cold cathode mercury fluorescent lamp as the light source 4, the light output rising characteristic at the initial lighting is poor, and the standby time until the light amount becomes stable must be set. Further, since the surface temperature of the arc tube near the sealed electrode exceeds about 100 ° C., not only does the performance of the CCD element 3 be adversely affected, but also a temperature countermeasure for the housing of the contact-type imaging device is required.
【０００６】次に、冷陰極希ガス蛍光ランプを光源４と
した密着形撮像装置では、点灯初期の光出力立ち上がり
特性など問題ないが、所要の光量を得るために発光管内
の封入ガス圧を上げる必要がある。ここで、所要の光量
を得るために封入ガス圧を上げると、一方では、陽光柱
が収縮して発光効率が低下するという問題がある。ま
た、発光管面温度が１２０℃程度に上昇し、封装された
電極近傍では、発光管面温度が１５０℃程度を超えるた
め、ＣＣＤ素子３の性能に悪影響を与えるだけでなく、
密着形撮像装置の筐体などに対する温度対策を要する。Next, in the contact type imaging device using the cold cathode rare gas fluorescent lamp as the light source 4, there is no problem such as the light output rising characteristic at the initial lighting, but the gas pressure in the arc tube is increased in order to obtain a required light quantity. There is a need. Here, when the filling gas pressure is increased in order to obtain a required light amount, on the other hand, there is a problem that the positive column shrinks and the luminous efficiency decreases. Further, the arc tube surface temperature rises to about 120 ° C., and in the vicinity of the sealed electrode, the arc tube surface temperature exceeds about 150 ° C., which not only adversely affects the performance of the CCD element 3 but also
It is necessary to take measures against the temperature of the housing of the contact type imaging device.
【０００７】さらに、発光ダイオードアレイ方式を光源
４とした密着形撮像装置では、発光ダイオードが点光源
であるため、配光分布を均一に確保することが困難であ
る。また、発光ダイオード導光方式を光源４とした密着
形撮像装置では、光源４が光束の低い発光ダイオードで
あるため、読み取りの光量が不足気味で、読み取りに長
時間を要する。Further, in the contact type image pickup apparatus using the light emitting diode array type as the light source 4, it is difficult to secure a uniform light distribution because the light emitting diodes are point light sources. Further, in the contact-type imaging device using the light emitting diode light guide system as the light source 4, the light source 4 is a light emitting diode having a low luminous flux.
【０００８】いずれにしても、従来の密着形撮像装置で
は、光源４の性能上などの制約があって、実用上、充分
満足できない状況にある。つまり、実用上要求されるコ
ンパクト化、高性能化、高信頼性化などの問題が残され
ており、それらの解決・改善が望まれている。In any case, the conventional contact-type imaging device is not sufficiently satisfactory in practical use due to restrictions on the performance of the light source 4 and the like. In other words, problems such as compactness, high performance, and high reliability that are required in practical use remain, and solutions and improvements thereof are desired.
【０００９】本発明は、上記事情に対処してなされたも
ので、高性能化、高信頼性化などが図られた密着形撮像
装置の提供を目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a contact-type imaging device that has achieved high performance and high reliability.
【００１０】[0010]
【課題を解決するための手段】請求項１の発明は、被撮
像体に対接する透光性板と、前記透光性板の一主面側に
植設された側壁体と、前記側壁体が形成する空間部に配
置装着され、かつ透光性板の一主面に一端面が対峙して
被撮像体の光像を通すレンズと、前記レンズの他端面に
対峙して配置装着され被撮像体の光像を撮像するＣＣＤ
素子と、前記レンズに沿って配置装着され、かつレンズ
の一端面が対峙する透光性板面領域を光照射する光源と
を有する密着形撮像装置であって、前記光源はキセノン
を主体とする希ガスが封入され、蛍光体非塗布の帯状光
投射部を備えた外面電極形蛍光ランプであることを特徴
とする密着形撮像装置である。According to a first aspect of the present invention, there is provided a light-transmitting plate contacting an object to be imaged, a side wall planted on one principal surface side of the light-transmitting plate, and the side wall body. A lens is disposed and mounted in a space formed by the lens, and has a first surface facing one principal surface of the light-transmitting plate and passes an optical image of an object to be imaged; and a lens disposed and mounted facing the other end surface of the lens. CCD that captures the light image of the imaging body
A contact-type imaging device having an element and a light source arranged and mounted along the lens, and irradiating a light-transmitting plate surface region where one end surface of the lens faces, wherein the light source is mainly made of xenon. A contact type imaging device characterized in that it is an external electrode type fluorescent lamp which is filled with a rare gas and has a band-shaped light projecting portion not coated with a phosphor.
【００１１】請求項２の発明は、請求項１記載の密着形
撮像装置において、外面電極形蛍光ランプは外径６ｍｍ
以下であることを特徴とする。According to a second aspect of the present invention, in the contact type imaging device according to the first aspect, the outer electrode type fluorescent lamp has an outer diameter of 6 mm.
It is characterized by the following.
【００１２】請求項１および２の発明は、一対の放電電
極が発光管外周面に設けられ、かつキセノンを主体とす
る希ガスを封入して成るアパーチャ形蛍光ランプを光源
として使用することを骨子としている。すなわち、前記
アパーチャ形蛍光ランプは、点灯初期の立ち上がり特性
がよく、管軸方向の配光均一性がすぐれており、高照度
が確実に得られ、かつ発光管面の温度を比較的低温で均
一に保持できるという特長を有することに着目して、本
発明に至ったものである。The invention according to claims 1 and 2 is characterized in that an aperture-type fluorescent lamp in which a pair of discharge electrodes is provided on the outer peripheral surface of an arc tube and in which a rare gas mainly composed of xenon is sealed is used as a light source. And That is, the aperture-type fluorescent lamp has a good start-up characteristic at the beginning of lighting, excellent light distribution uniformity in the tube axis direction, high illuminance can be reliably obtained, and the temperature of the arc tube surface is relatively low and uniform. The present invention has been achieved by paying attention to the feature that it can be held at the same time.
【００１３】請求項１および２の発明において、透光性
板は、たとえば原稿などの被撮像体を他主面に載置ない
しセットするガラス板などである。また、この透光性板
の一主面側に植設された側壁体は、たとえば金属、合成
樹脂、セラミックスなどを素材とした板などであり、前
記透光性板とで密着形撮像装置の筐体を構成している。
さらに、前記透光性板の一主面に一端面が対峙して光像
を通すレンズは、たとえばセルフォックレンズ、もしく
はロットレンズアレイなどである。そして、被撮像体の
光像を撮像するＣＣＤ素子を含むこれらの構成は、基本
的に、従来の密着形撮像装置の場合と同様なので、その
詳細な説明は省略する。In the first and second aspects of the present invention, the translucent plate is, for example, a glass plate on which an object to be imaged such as a document is placed or set on another main surface. Further, the side wall body implanted on one main surface side of the translucent plate is, for example, a plate made of a material such as metal, synthetic resin, or ceramics. It constitutes a housing.
Further, a lens having one end surface facing one main surface of the translucent plate and transmitting an optical image is, for example, a selfoc lens or a lot lens array. These configurations including a CCD element for capturing an optical image of an object to be imaged are basically the same as those of a conventional contact-type imaging device, and thus detailed description thereof is omitted.
【００１４】請求項１および２の発明において、レンズ
に沿って配置装着され、かつレンズの一端面が対峙する
透光性板面領域を光照射するアパーチャ形蛍光ランプ
は、一般的に、次のように構成されたものである。すな
わち、外径２．０〜６．０ｍｍ程度、肉厚０．２〜０．
６ｍｍ程度、長さ２００〜６００ｍｍ程度のガラス管
で、この内壁面に、ガラス管軸方向に一定の幅で、帯状
の蛍光体非塗布部（光投射部）が設けられ、かつガラス
管内にキセノンガス、キセノン−ネオン混合ガス、キセ
ノン−アルゴン混合ガスなどキセノンガスを主体とした
希ガスが封入されて発光管を構成している。なお、帯状
の蛍光体非塗布部の幅は、特に、限定されないが、一般
的に、ガラス管軸を基点とし、断面的に、３０〜９０°
程度の角度範囲に設定される。According to the first and second aspects of the present invention, an aperture type fluorescent lamp which is arranged and mounted along a lens and irradiates a light-transmitting plate surface region where one end surface of the lens faces is generally provided with the following. It is configured as follows. That is, the outer diameter is about 2.0 to 6.0 mm, and the thickness is 0.2 to 0.1 mm.
A glass tube having a length of about 6 mm and a length of about 200 to 600 mm, a band-shaped phosphor non-applied portion (light projecting portion) having a constant width in the glass tube axial direction is provided on the inner wall surface, and xenon is provided in the glass tube. A rare gas mainly composed of xenon gas, such as gas, xenon-neon mixed gas, or xenon-argon mixed gas, is sealed to form an arc tube. In addition, the width of the band-shaped phosphor non-applied portion is not particularly limited, but is generally 30 to 90 ° in cross section with the glass tube axis as a base point.
The angle range is set to about.
【００１５】また、前記ガラス管の外周面には、前記蛍
光体非塗布部に対向する領域を避けて、一対の放電用外
部電極層（外部電極）を設けた構成が採られている。こ
こで、外部電極は、たとえば導電性膜、アルミニウム箔
などの被着もしくは貼着で形成され、蛍光体非塗布部
（光投射部）に対応する領域の間隔を比較的広く設定す
る。なお、要すれば、外部電極形成面を熱収縮性の樹脂
チューブで被覆した構成を採って、補強や安全性の向上
を図ってもよい。Further, a configuration is adopted in which a pair of discharge external electrode layers (external electrodes) is provided on the outer peripheral surface of the glass tube so as to avoid a region facing the phosphor non-coated portion. Here, the external electrode is formed by, for example, attaching or sticking a conductive film, aluminum foil, or the like, and sets a relatively large interval between regions corresponding to the phosphor non-applied portion (light projection portion). If necessary, a configuration in which the external electrode forming surface is covered with a heat-shrinkable resin tube may be employed to enhance reinforcement and improve safety.
【００１６】請求項１および２の発明では、光源を成す
アパーチャ形蛍光ランプが、点灯初期の立ち上がり特
性、管軸方向の配光均一性などすぐれており、また、高
照度が得られるだけでなく、発光管面の温度も比較的低
温で均一に保持する。したがって、コンパクト化、高性
能化、高信頼性化などの図られた密着形撮像装置として
機能する。According to the first and second aspects of the present invention, the aperture-type fluorescent lamp serving as the light source is excellent not only in the initial startup characteristics, light distribution uniformity in the tube axis direction, etc., but also high illuminance can be obtained. Also, the temperature of the arc tube surface is maintained at a relatively low temperature. Therefore, it functions as a contact-type imaging device that is compact, has high performance, and has high reliability.
【００１７】[0017]
【発明の実施形態】以下、図１および図２を参照して実
施例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS.
【００１８】図１は、実施例に係る密着形撮像装置の概
略構成を示す斜視図である。図１において、８は被撮像
体、たとえば原稿を載置する（対接する）透光性板、９
ａ，９ｂは前記透光性板８の一主面側に植設された側壁
体、１０は前記側壁体９ａ，９ｂ間に形成される空間部
に配置装着され、かつ透光性板８の一主面に一端面が対
峙して被撮像体の光像を通すレンズである。ここで、レ
ンズ１０はたとえばセルフォックレンズであり、高さ５
ｍｍ、幅２ｍｍ、長さ４００ｍｍ程度である。FIG. 1 is a perspective view showing a schematic configuration of a contact-type imaging device according to an embodiment. In FIG. 1, reference numeral 8 denotes a translucent plate on which an object to be imaged, for example, a document is placed (adjacent);
Reference numerals a and 9b denote side walls implanted on one main surface side of the translucent plate 8, and 10 is disposed and mounted in a space formed between the side walls 9a and 9b. This is a lens that passes an optical image of an object to be imaged with one end surface facing one principal surface. Here, the lens 10 is, for example, a selfoc lens and has a height of 5
mm, width 2 mm and length 400 mm.
【００１９】また、１１は前記レンズ１０の他端面に対
峙して配置装着され、透光性板８面に載置された被撮像
体の光像を撮像するＣＣＤ素子、１２ａ，１２ｂは前記
レンズ１０に沿って配置装着され、かつレンズ１０の一
端面が対峙する透光性板８面領域を光照射する光源であ
る。ここで、光源１２ａ，１２ｂは、キセノンを主体と
する希ガスが封入され、蛍光体非塗布による帯状光投射
部１３ａ，１３ｂを備えた外面電極形蛍光ランプであ
る。Reference numeral 11 denotes a CCD element arranged and mounted so as to face the other end face of the lens 10 and picks up a light image of an object to be imaged placed on the surface of the translucent plate 8, and 12a and 12b denote the lens elements. The light source is a light source that is arranged and mounted along the light source 10 and irradiates the light-transmitting plate 8 surface region where one end surface of the lens 10 faces. Here, the light sources 12a and 12b are external electrode type fluorescent lamps which are filled with a rare gas mainly composed of xenon and have band light projecting portions 13a and 13b which are not coated with a phosphor.
【００２０】すなわち、外径４ｍｍ、肉厚０．３ｍｍ、
長さ４００ｍｍ程度のガラス管を発光管本体とし、その
ガラス管内壁面に一定幅の帯状（アパーチャ角度７０
°）の蛍光体非塗布部１３ａ，１３ｂを残して蛍光体膜
が形成され、かつキセノンガスを放電媒体として封入す
る一方、ガラス管外周面に一対の放電電極層を対向して
配置した構成のアパーチャ形の外面電極形蛍光ランプ１
２ａ，１２ｂである。That is, the outer diameter is 4 mm, the wall thickness is 0.3 mm,
A glass tube having a length of about 400 mm is used as an arc tube main body, and a band of a fixed width (aperture angle 70) is formed on the inner wall surface of the glass tube.
°), the phosphor film is formed leaving the phosphor non-coating portions 13a and 13b, and xenon gas is sealed as a discharge medium, while a pair of discharge electrode layers are arranged facing the outer peripheral surface of the glass tube. Aperture type external electrode type fluorescent lamp 1
2a and 12b.
【００２１】なお、上記アパーチャ形の外面電極形蛍光
ランプ１２ａ，１２ｂは、図示を省略した一対の外部電
極に、所要の正弦波、パルス波、あるいは矩形波（たと
えば２０〜１００ＫＨｚ、１〜２ＫＶの電圧）を印加す
ると、両電極による放電が容易に開始し、ガラス管内で
紫外線を放射する。そして、放射された紫外線がガラス
管内壁面の蛍光体膜によって可視光線に変換され、速や
かに蛍光ランプとして機能する。The aperture-type external electrode type fluorescent lamps 12a and 12b are connected to a pair of external electrodes (not shown) by applying a required sine wave, pulse wave or rectangular wave (for example, 20 to 100 KHz, 1 to 2 KV). When a voltage is applied, discharge by both electrodes starts easily, and ultraviolet rays are emitted in the glass tube. Then, the emitted ultraviolet light is converted into visible light by the phosphor film on the inner wall surface of the glass tube, and quickly functions as a fluorescent lamp.
【００２２】すなわち、このアパーチャ形の外面電極形
蛍光ランプ１２ａ，１２ｂは、希ガス放電形であるた
め、約２０ｍｓｅｃで最大照度が得られ、また、封入ガ
スがキセノン系であることに伴って、低温光量も周囲温
度にほとんど影響されず、安定した光出力を呈する。さ
らに、発光管から放射される可視光線は、蛍光体非塗布
の帯状光投射部（アパーチャ部）１３ａ，１３ｂを介し
て効率よく放射され、かつ管軸方向の配光の均一性も採
り易い。That is, since the aperture type external electrode type fluorescent lamps 12a and 12b are of the rare gas discharge type, the maximum illuminance can be obtained in about 20 msec, and the enclosed gas is a xenon type. The low-temperature light amount is hardly affected by the ambient temperature, and exhibits a stable light output. Further, the visible light emitted from the arc tube is efficiently radiated through the band-shaped light projecting portions (aperture portions) 13a and 13b on which the phosphor is not applied, and the uniformity of the light distribution in the tube axis direction can be easily obtained.
【００２３】図２は、この種アパーチャ形の外面電極形
蛍光ランプの特性例を示すもので、曲線Ａは、外径４ｍ
ｍ、肉厚０．３ｍｍ、長さ４００ｍｍ程度のガラス管を
発光管本体とし、アパーチャ角度７０°、キセノンガス
封入アパーチャ形の外面電極形蛍光ランプの入力電力と
照度（ｌｘ）との関係を、また、曲線Ｂは、外径６ｍ
ｍ、肉厚０．５ｍｍ、長さ４００ｍｍ程度のガラス管を
発光管本体とし、アパーチャ角度７０°、キセノンガス
封入アパーチャ形の外面電極形蛍光ランプの入力電力と
照度（ｌｘ）との関係をそれぞれ示す。FIG. 2 shows an example of the characteristics of an aperture type external electrode type fluorescent lamp of this type. Curve A shows an outer diameter of 4 m.
m, a glass tube having a thickness of about 0.3 mm and a length of about 400 mm as an arc tube main body, an aperture angle of 70 °, and a relation between input power and illuminance (lx) of an external electrode type fluorescent lamp of xenon gas filled aperture type. Curve B has an outer diameter of 6 m.
m, a glass tube having a thickness of about 0.5 mm and a length of about 400 mm are used as an arc tube main body. Show.
【００２４】次に、上記密着形撮像装置の動作について
説明する。アパーチャ形の外面電極形蛍光ランプ１２
ａ，１２ｂに、所定の点灯回路を介して所要の電圧を印
加すると、一対の外面電極による放電が開始し、ガラス
管内で紫外線を放射する。この放射された紫外線が、ガ
ラス管内壁面の蛍光体膜によって可視光線に変換され、
速やかに最大照度を呈する蛍光ランプとして機能する。Next, the operation of the contact type imaging device will be described. Aperture type external electrode type fluorescent lamp 12
When a required voltage is applied to a and 12b via a predetermined lighting circuit, discharge is started by a pair of outer electrodes, and ultraviolet rays are radiated in the glass tube. The emitted ultraviolet light is converted into visible light by the phosphor film on the inner surface of the glass tube,
It functions as a fluorescent lamp that quickly exhibits maximum illuminance.
【００２５】そして、この最大照度を呈するアパーチャ
形の外部電極形蛍光ランプ１２ａ，１２ｂの光出力は、
アパーチャ部１３ａ，１３ｂを介して、レンズ１０の一
端面が対峙する透光性板８領域を照射する。つまり、ア
パーチャ形の外面電極形蛍光ランプ１２ａ，１２ｂの光
出力は、効率よく、透光性板８の所定領域を照射・露光
し、透光性板８の所定領域面に載置・セットされた被撮
像体、たとえば原稿を鮮明な光像として、対峙するレン
ズ１０が受けられように機能する。The light output of the aperture type external electrode type fluorescent lamps 12a and 12b exhibiting the maximum illuminance is:
The area of the light-transmitting plate 8 where one end face of the lens 10 faces is irradiated through the aperture parts 13a and 13b. That is, the light output of the aperture-type external electrode fluorescent lamps 12a and 12b efficiently irradiates and exposes a predetermined area of the light transmitting plate 8, and is placed and set on the predetermined area surface of the light transmitting plate 8. The object to be imaged, for example, a document, functions as a clear light image so that the confronting lens 10 can be received.
【００２６】この露光過程において、前記アパーチャ形
の外部電極形蛍光ランプ１２ａ，１２ｂは、速やかに最
大照度の光を出力するだけでなく、周囲温度に影響され
ず安定している。また、安定的な光出力は、管軸方向に
延設された帯状のアパーチャ部１３ａ，１３ｂから放射
され、管軸方向の配光も均一性を呈し易いので、対峙す
るレンズ１０の一端面に、確実、かつ鮮明な光像を形成
することができる。In this exposure process, the aperture type external electrode type fluorescent lamps 12a and 12b not only output light of maximum illuminance quickly but are stable without being affected by the ambient temperature. In addition, the stable light output is emitted from the band-shaped aperture portions 13a and 13b extending in the tube axis direction, and the light distribution in the tube axis direction tends to exhibit uniformity. A reliable and clear light image can be formed.
【００２７】しかも、アパーチャ形の外部電極形蛍光ラ
ンプ１２ａ，１２ｂの場合は、放電電極が管軸に沿って
ほぼ全長に亘って配置されているため、負グローの形成
による温度も管面全域に分散する状態を採って、管面温
度も６０℃程度に抑制される。したがって、外部電極形
蛍光ランプ１２ａ，１２ｂの近傍に配置されているレン
ズ１０、ＣＣＤ素子１１などに熱的な悪影響を及ぼす恐
れも低減し、信頼性の高い撮像が可能となる。In addition, in the case of the aperture type external electrode type fluorescent lamps 12a and 12b, since the discharge electrodes are arranged over substantially the entire length along the tube axis, the temperature due to the formation of the negative glow also extends over the entire tube surface. By taking a state of dispersion, the tube surface temperature is also suppressed to about 60 ° C. Therefore, the risk of adversely affecting the lens 10 and the CCD element 11 disposed near the external electrode type fluorescent lamps 12a and 12b can be reduced, and highly reliable imaging can be performed.
【００２８】上記では、２本のアパーチャ形の外部電極
形蛍光ランプ１２ａ，１２ｂを光源とした密着形撮像装
置（密着形イメージセンサモジュール）について説明し
たが、アパーチャ形の外部電極形蛍光ランプ１２ａ，１
２ｂは、２本に限定されるものでなく、用途、目的など
によって、１本でも３本以上でもよい。In the above description, the contact type image pickup device (contact type image sensor module) using the two aperture type external electrode type fluorescent lamps 12a and 12b as the light source has been described. However, the aperture type external electrode type fluorescent lamps 12a and 12b are used. 1
The number 2b is not limited to two, but may be one or three or more depending on the application and purpose.
【００２９】本発明は、上記実施例に限定されるもので
なく、発明の趣旨を逸脱しない範囲でいろいろの変形を
採ることができる。たとえば、被撮像体に対接する透光
性板の材質、透光性板に対する側壁体の植設・構造、レ
ンズの種類や形などは、密着形撮像装置の使用態様など
に応じて、適宜選択設定することができる。The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the material of the light-transmitting plate in contact with the object to be imaged, the implantation and structure of the side wall body with respect to the light-transmitting plate, the type and shape of the lens, and the like are appropriately selected according to the usage mode of the contact type imaging device. Can be set.
【００３０】[0030]
【発明の効果】請求項１および２の発明によれば、すぐ
れた点灯初期の立ち上がり特性、管軸方向の配光均一
性、高い照度の光出力、発光管面温度も低温で均一に保
持されるなど、アパーチャ形の外部電極形蛍光ランプの
特長が充分に生かされる。つまり、電子複写機やファク
シミリなどのコンパクト化が図られ、かつ高品質像ない
し高画質像の形成に寄与する原稿読み取りに適する密着
形撮像装置を提供できる。According to the first and second aspects of the present invention, excellent initial startup characteristics, uniform light distribution in the tube axis direction, high illuminance light output, and the temperature of the arc tube surface are maintained uniformly at a low temperature. Thus, the features of the aperture type external electrode type fluorescent lamp can be fully utilized. In other words, it is possible to provide a contact-type imaging apparatus which is compact in an electronic copying machine, a facsimile or the like, and is suitable for reading a document which contributes to formation of a high quality image or a high quality image.
【図１】実施例に係る密着形撮像装置の概略構成を示す
斜視図。FIG. 1 is a perspective view showing a schematic configuration of a contact-type imaging device according to an embodiment.
【図２】アパーチャ形の外部電極形蛍光ランプの特性例
を示す曲線図。FIG. 2 is a curve diagram showing an example of characteristics of an aperture type external electrode type fluorescent lamp.
【図３】ファクシミリ装置の概略構成を示す展開説明
図。FIG. 3 is a development explanatory view showing a schematic configuration of the facsimile apparatus.
８……透光性板 ９ａ，９ｂ……側壁体 １０……レンズ １１……ＣＣＤ素子 １２ａ，１２ｂ……アパーチャ形の外部電極形蛍光ラン
プ １３ａ，１３ｂ……アパーチャ部（帯状光投射部）8 Translucent plate 9a, 9b Side wall body 10 Lens 11 CCD element 12a, 12b Aperture type external electrode type fluorescent lamp 13a, 13b Aperture part (band-shaped light projection part)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 土屋 竜二 愛媛県今治市旭町五丁目２番地の１ ハリ ソン東芝ライティング株式会社内 (72)発明者 丸山 弘晃 愛媛県今治市旭町五丁目２番地の１ ハリ ソン東芝ライティング株式会社内 Ｆターム(参考） 5B047 AA01 BB02 BC05 BC12 5C072 AA01 BA13 CA04 CA09 DA02 DA25 EA05 XA01 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ryuji Tsuchiya 1-2-1 Asahicho, Imabari-shi, Ehime Prefecture Harrison Toshiba Lighting Co., Ltd. (72) Inventor Hiroaki Maruyama 5-2-2 Asahicho, Imabari-shi, Ehime Prefecture No. 1 Harrison Toshiba Lighting Co., Ltd. F-term (reference) 5B047 AA01 BB02 BC05 BC12 5C072 AA01 BA13 CA04 CA09 DA02 DA25 EA05 XA01
Claims (2)
光性板の一主面側に植設された側壁体と、前記側壁体が
形成する空間部に配置装着され、かつ透光性板の一主面
に一端面が対峙して被撮像体の光像を通すレンズと、前
記レンズの他端面に対峙して配置装着され、被撮像体の
光像を撮像するＣＣＤ素子と、前記レンズに沿って配置
装着され、かつレンズの一端面が対峙する透光性板面領
域を光照射する光源とを有する密着形撮像装置であっ
て、 前記光源はキセノンを主体とする希ガスが封入され、蛍
光体非塗布の帯状光投射部を備えた外面電極形蛍光ラン
プであることを特徴とする密着形撮像装置。1. A light-transmitting plate which is in contact with an object to be imaged, a side wall planted on one main surface side of the light-transmitting plate, and is mounted on a space formed by the side wall, and A lens having one end face facing one main surface of the light-transmitting plate and passing the light image of the object to be picked up, and a CCD element arranged and mounted opposite the other end face of the lens to pick up the light image of the object to be picked up And a light source arranged and mounted along the lens and illuminating a light-transmitting plate surface region where one end surface of the lens faces, wherein the light source is a rare-earth light source mainly composed of xenon. A contact-type imaging device, characterized in that it is an external electrode type fluorescent lamp provided with a gas-sealed, phosphor-free, band-shaped light projection unit.
であることを特徴とする請求項１記載の密着形撮像装
置。2. The contact type imaging device according to claim 1, wherein the outer electrode type fluorescent lamp has an outer diameter of 6 mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000388959A JP2002190919A (en) | 2000-12-21 | 2000-12-21 | Contact type imaging apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000388959A JP2002190919A (en) | 2000-12-21 | 2000-12-21 | Contact type imaging apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002190919A true JP2002190919A (en) | 2002-07-05 |
Family
ID=18855607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000388959A Withdrawn JP2002190919A (en) | 2000-12-21 | 2000-12-21 | Contact type imaging apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002190919A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005316098A (en) * | 2004-04-28 | 2005-11-10 | Ushio Inc | Original illuminating device |
| JP2009124720A (en) * | 2008-12-22 | 2009-06-04 | Mitsubishi Electric Corp | Line light source and contact type image sensor |
| WO2013136619A1 (en) | 2012-03-14 | 2013-09-19 | 三菱電機株式会社 | Light source device |
-
2000
- 2000-12-21 JP JP2000388959A patent/JP2002190919A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005316098A (en) * | 2004-04-28 | 2005-11-10 | Ushio Inc | Original illuminating device |
| JP2009124720A (en) * | 2008-12-22 | 2009-06-04 | Mitsubishi Electric Corp | Line light source and contact type image sensor |
| JP4496417B2 (en) * | 2008-12-22 | 2010-07-07 | 三菱電機株式会社 | Line light source and contact image sensor using the same |
| WO2013136619A1 (en) | 2012-03-14 | 2013-09-19 | 三菱電機株式会社 | Light source device |
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