JPS59189773A - Picture reading lens array - Google Patents

Picture reading lens array

Info

Publication number
JPS59189773A
JPS59189773A JP58063033A JP6303383A JPS59189773A JP S59189773 A JPS59189773 A JP S59189773A JP 58063033 A JP58063033 A JP 58063033A JP 6303383 A JP6303383 A JP 6303383A JP S59189773 A JPS59189773 A JP S59189773A
Authority
JP
Japan
Prior art keywords
lenses
lens array
light shielding
lens
light
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.)
Pending
Application number
JP58063033A
Other languages
Japanese (ja)
Inventor
Atsushi Nakayama
淳 中山
Toyomitsu Takatsuka
高塚 豊光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Inc
Original Assignee
Asahi Glass Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to JP58063033A priority Critical patent/JPS59189773A/en
Publication of JPS59189773A publication Critical patent/JPS59189773A/en
Pending legal-status Critical Current

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  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To obtain a picture reading lens array which can prevent sufficiently the penetration of an unnecessary light and is inexpensive and is easy to produce, by forming the lens array with lenses arranged at proper intervals and arranging light shielding materials between these lenses vertically to the optical axis of lenses. CONSTITUTION:In the lens array of this invention, lenses L are arranged at intervals of a length (l) into a face. This length (l) is a length between edges closest to each other of adjacent lenses and is determined properly by design of the lens array. Light shielding materials 2 are provided in regions between individual lenses of this lens array, namely, regions on the outside of optical paths of individual lenses to prevent the unnecessary light, which is made incident to lenses obliquely, from being incident to photoelectric sensors. Normally, light shielding plates or black paint layers are used as these light shielding materials. Light shielding plates 4 are provided between lenses and photoelectric sensors 5, which are arranged a desired length apart from each other, vertically to the optical axes of lenses to obtain a more sufficient effect. Light shielding plates 4 are provided in parts other than optical paths of individual lenses, and normally, 2-4 light shielding plates 4 are arranged in parallel at intervals of a proper length in the direction of the optical axis of each lens.

Description

【発明の詳細な説明】 本発明は画像読取りレンズアレイに関する。[Detailed description of the invention] The present invention relates to an image reading lens array.

複写機やファクシミリ等に使用される原稿画像読取υ用
のレンズアレイは、従来は各レンズを密着させて配列し
であるため、斜めよシ入射する不要な光を遮光するため
の遮光壁は、レンズの光軸方向に沿って長いものを必要
としていた。
Conventionally, lens arrays for document image reading υ used in copying machines and facsimile machines are arranged in such a way that each lens is placed in close contact with each other. We needed a lens that was long along the optical axis direction.

即ち、従来のレンズアレイは第1図に示すように各レン
ズL1 + ”tに対応して光電センサー”1 + J
が置かれておシ、例えば原稿lのBの光像がレンズL、
を透過し、光電センサーS1で受光されるようになって
いる。この場合、L。
That is, as shown in FIG. 1, the conventional lens array has a photoelectric sensor "1 + J" corresponding to each lens L1 + "t".
is placed, for example, the light image of B of document L is placed on lens L,
The light passes through and is received by the photoelectric sensor S1. In this case, L.

以外のレンズより透過した光を6.が受光すると、例え
ば画像AがレンズL、を通って81に入射すると、Sl
では画像BにAが重なυ鮮明な画像Bが得られなくなる
。このため、斜めよυ入射する不要な光を遮光するため
の遮光壁6が必要でおる。
6. Light transmitted from other lenses. For example, when image A passes through lens L and enters 81, Sl
In this case, a clear image B in which image A overlaps image B cannot be obtained. Therefore, a light shielding wall 6 is required to shield unnecessary light incident obliquely.

従来のレンズアレイにおいては、レンズLl。In conventional lens arrays, lenses Ll.

L、 −−−−−が近接して配列されているため、遮光
壁がレンズの光軸方向の大部分に配置されていないと、
隣接のレンズ方向から斜めに入射する光を完全に防止で
きないため、目的を達成することかできない。例えば、
レンズLの直径を1mとした場合、遮光壁6は直径0.
8〜0.9閣で長さ5〜20簡のトンネル状に配置する
必要があった。このような筒状の遮光壁は、製作が煩雑
でしかも高価である。
Since L, ------- are arranged closely, if the light shielding wall is not placed in most of the optical axis direction of the lens,
Since it is not possible to completely prevent light obliquely entering from the direction of the adjacent lens, the objective cannot be achieved. for example,
When the diameter of the lens L is 1 m, the light shielding wall 6 has a diameter of 0.
It was necessary to arrange it in the shape of a tunnel with a length of 8 to 0.9 kaku and a length of 5 to 20 kan. Such a cylindrical light shielding wall is complicated and expensive to manufacture.

本発明は、このような従来の画像読取シレンズアレイに
おける欠点を解消するもので、レンズアレイを適当な間
隔で配列したレンズから構成し、これらレンズの間に遮
光層をレンズ光軸に対し垂直に配置することを特徴とす
る。
The present invention solves the drawbacks of conventional image reading lens arrays, and consists of a lens array consisting of lenses arranged at appropriate intervals, and a light shielding layer between these lenses perpendicular to the lens optical axis. It is characterized by being placed in.

次に、本発明の実施例を図面に従って具体的に説明する
Next, embodiments of the present invention will be specifically described with reference to the drawings.

本発明に係るレンズアレイは、第2図に示すようにレン
ズLがtの間隔で面状に配列さ扛ている。ここで、レン
ズの間隔tは、概略的に、隣接するレンズの最も近接し
ている距離で、レンズアレイの設計によシ適宜決めらn
る。本発明は、このようなレンズアレイを用いた光学系
の各レンズ間の範域すなわち各レンズの光路外の範域に
遮光体2を設け、斜めよシレンズに入射する不要光が光
電センサーへ入るのを防止するようにする。
In the lens array according to the present invention, as shown in FIG. 2, lenses L are arranged in a plane at intervals of t. Here, the distance t between the lenses is roughly the closest distance between adjacent lenses, and is determined as appropriate depending on the design of the lens array.
Ru. The present invention provides a light shielding body 2 in the range between each lens of an optical system using such a lens array, that is, in the range outside the optical path of each lens, so that unnecessary light incident on the lens obliquely enters the photoelectric sensor. Try to prevent this from happening.

この遮光体2は、通常、遮光板又は黒色塗料層を適用す
る。遮光板を使用する場合には、斜め方向からレンズに
入射する不要光をできるだけ遮断するために、レンズア
レイに近接して設けるのが望ましい。更に、本発明の目
的を効果的に達成するためには、遮光体はレンズ間の範
域全体に設けるようにする。
This light shielding body 2 is usually a light shielding plate or a black paint layer. When using a light shielding plate, it is desirable to provide it close to the lens array in order to block unnecessary light that enters the lens from an oblique direction as much as possible. Furthermore, in order to effectively achieve the object of the present invention, the light shielding body should be provided in the entire area between the lenses.

第3図及び第4図は本発明の改良された他の実施例に係
るレンズアレイである。第3図は、所望の間隔で配列さ
れたレンズと光電センサー5との間にも、遮光板4をレ
ンズの光軸に垂直に設けることによシ、よシ十分な効果
が得られるようにしたものである。遮光板4は、各レン
ズの光路以外の部分に設置される。その数は特に制限さ
れないが、通常は2〜4個をレンズの光軸方向に適当な
間隔を置いて並列する。このように複数個の遮光板4を
設ける場合、光−1センサー5に入る不要光をよシ完全
に遮断するため、各レンズの光路以外の範域をその光軸
と垂直方向において遮断するように、遮光板4の遮光域
をレンズの光軸に沿って変えるのが望ましい。即ち、光
電センサー5に近ずくほどその遮光域を大きくする。
FIGS. 3 and 4 show lens arrays according to other improved embodiments of the present invention. FIG. 3 shows that by providing a light shielding plate 4 perpendicular to the optical axis of the lenses between the lenses arranged at a desired interval and the photoelectric sensor 5, a sufficient effect can be obtained. This is what I did. The light shielding plate 4 is installed in a portion other than the optical path of each lens. The number is not particularly limited, but usually 2 to 4 are arranged in parallel at appropriate intervals in the optical axis direction of the lens. When a plurality of light shielding plates 4 are provided in this way, in order to completely block unnecessary light entering the light-1 sensor 5, a range other than the optical path of each lens is blocked in a direction perpendicular to its optical axis. In addition, it is desirable to change the light-shielding area of the light-shielding plate 4 along the optical axis of the lens. That is, the closer the sensor is to the photoelectric sensor 5, the larger the light blocking area becomes.

このような目的に好適する遮光板は、レンズアレイ3の
レンズの直径およびその間隔に合せて薄板を穿孔加工す
ることによシ、便宜的に得られる。例えば、レンズ直径
約IIII+1の場合、厚味0.1〜0.5鰭程度の遮
光性薄板に直径約0.5〜0.9調の孔を加工する。こ
の場合、前記の遮光域の調節は、この孔のパターンは同
じで直径のみを変えれば良い。
A light shielding plate suitable for such a purpose can be conveniently obtained by punching a thin plate according to the diameter of the lenses of the lens array 3 and the spacing between the lenses. For example, in the case of a lens diameter of about III+1, holes with a diameter of about 0.5 to 0.9 scale are formed in a light-shielding thin plate with a thickness of about 0.1 to 0.5 fins. In this case, the above-mentioned light-shielding area can be adjusted by keeping the hole pattern the same and changing only the diameter.

更に、本発明を実施する場合、レンズと遮光板あるいは
遮光板間は、通常は空気層であるが、アクリル樹脂など
の透明媒体で充し、遮光板を透明媒体中に埋設するよう
にしても良い。
Furthermore, when carrying out the present invention, the space between the lens and the light-shielding plate or between the light-shielding plates is usually an air layer, but it may also be filled with a transparent medium such as acrylic resin, and the light-shielding plate is embedded in the transparent medium. good.

第4図は、本発明の他の異なる実施例である。FIG. 4 shows another different embodiment of the invention.

2個のレンズアレイ3,3′を組合せることにょシ、光
電センサー5で読みとる画像を原稿と同じ正立の状態で
続みとるようにしたものである。
By combining the two lens arrays 3 and 3', the image read by the photoelectric sensor 5 can be continuously read in the same erect state as the original.

各レンズアレイはその表裏面の間に透明中間層を具備し
ておシ、実施例はこのよう々レンズアレイの原稿側レン
ズアレイ3に遮光塗層及び遮光板を設けた場合である。
Each lens array has a transparent intermediate layer between its front and back surfaces, and in this embodiment, a light-shielding coating layer and a light-shielding plate are provided on the document-side lens array 3 of the lens array.

しかしながら、光電センサー側のレンズアレイあるいは
これら2つのレンズアレイの間にも、必要に応じて遮光
塗層あるいは遮光板を同様に設けても良い。
However, if necessary, a light-shielding coating layer or a light-shielding plate may be similarly provided on the lens array on the photoelectric sensor side or between these two lens arrays.

本発明は、以上説明したように画像伝送用レンズアレイ
を適当な間隔で配列したレンズで形成し、これらレンズ
間に遮光塗層あるいは遮光   □板等の遮光体をレン
ズ光軸に対し垂直に配置しているので、斜めよシ入射す
る不要光が光電センサーに入るのを防止することができ
る。しかもレンズの光軸方向に複数個の遮光体を隔置し
て設けることによシ、上記不要光の侵入を十分に防止で
きるので、画像を鮮明に読み取ることができる。
As explained above, in the present invention, an image transmission lens array is formed of lenses arranged at appropriate intervals, and a light-shielding body such as a light-shielding coating or a light-shielding plate is arranged between these lenses perpendicularly to the optical axis of the lens. This prevents unnecessary light incident diagonally from entering the photoelectric sensor. Furthermore, by providing a plurality of light shielding bodies spaced apart in the optical axis direction of the lens, it is possible to sufficiently prevent the unnecessary light from entering, so that images can be read clearly.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は従来のレンズアレイの断面説明図、第2図は本
発明に係る最も一般的なレンズアレイの断面説明図、第
3図及び第4図は本発明の他の災施例を示す断面説明図
。 図に2いて、1は原稿、2は遮光体、3はレンズアレイ
、5は光電センサー。 71川 72)3)’ ・H ;r4川 / ■
Fig. 1 is a cross-sectional explanatory diagram of a conventional lens array, Fig. 2 is a cross-sectional explanatory diagram of the most general lens array according to the present invention, and Figs. 3 and 4 show other embodiments of the present invention. Cross-sectional explanatory diagram. In the figure 2, 1 is a document, 2 is a light shield, 3 is a lens array, and 5 is a photoelectric sensor. 71 river 72) 3)'・H;r4 river/ ■

Claims (1)

【特許請求の範囲】 (1)  読取p側の反対面に光電センサーを具えた画
像伝送用レンズアレイにおいて、レンズアレイは適当な
間隔で面状に配列されたレンズからなシ、斜めよシ入射
する不要な光が前記光電センサーへ入るのを防止するた
めの遮光体を、各レンズの間にレンズ光軸に対し垂直に
配置した画像読取シレンズアレイ。 (2)  遮光体がレンズ部分を切欠いた遮光板である
特許請求の範囲第1項記載の画像読取りレンズアレイ。 (8)  遮光体が黒色塗膜である特許請求の範囲第1
項記載の画像読取シレ/ズアレイ。
[Scope of Claims] (1) In a lens array for image transmission equipped with a photoelectric sensor on the opposite surface to the reading p side, the lens array is composed of lenses arranged in a plane at appropriate intervals. An image reading lens array in which a light shield for preventing unnecessary light from entering the photoelectric sensor is arranged between each lens perpendicularly to the lens optical axis. (2) The image reading lens array according to claim 1, wherein the light shielding member is a light shielding plate with a lens portion cut out. (8) Claim 1 in which the light shielding body is a black coating film
Image reading wrinkles/squeezes as described in section.
JP58063033A 1983-04-12 1983-04-12 Picture reading lens array Pending JPS59189773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58063033A JPS59189773A (en) 1983-04-12 1983-04-12 Picture reading lens array

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58063033A JPS59189773A (en) 1983-04-12 1983-04-12 Picture reading lens array

Publications (1)

Publication Number Publication Date
JPS59189773A true JPS59189773A (en) 1984-10-27

Family

ID=13217606

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58063033A Pending JPS59189773A (en) 1983-04-12 1983-04-12 Picture reading lens array

Country Status (1)

Country Link
JP (1) JPS59189773A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6276357A (en) * 1985-09-27 1987-04-08 Matsushita Electric Ind Co Ltd Solid-state image pickup device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS562466U (en) * 1979-06-19 1981-01-10
JPS56161772A (en) * 1980-05-15 1981-12-12 Canon Inc Original reader

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS562466U (en) * 1979-06-19 1981-01-10
JPS56161772A (en) * 1980-05-15 1981-12-12 Canon Inc Original reader

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6276357A (en) * 1985-09-27 1987-04-08 Matsushita Electric Ind Co Ltd Solid-state image pickup device

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