JPS58202661A - Image pickup device - Google Patents
Image pickup deviceInfo
- Publication number
- JPS58202661A JPS58202661A JP57086318A JP8631882A JPS58202661A JP S58202661 A JPS58202661 A JP S58202661A JP 57086318 A JP57086318 A JP 57086318A JP 8631882 A JP8631882 A JP 8631882A JP S58202661 A JPS58202661 A JP S58202661A
- Authority
- JP
- Japan
- Prior art keywords
- original
- photoelectric conversion
- image
- light
- mirror
- 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
Links
Classifications
-
- 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
- H04N1/19—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 multi-element arrays
- H04N1/191—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 multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
- H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
- H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Image Processing (AREA)
- Facsimile Heads (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ファクシミリ、複写機等の撮像装置に関し、
特に、複数個の光電変換素子で構成さｎる撮像装置に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an imaging device such as a facsimile machine or a copying machine.
In particular, the present invention relates to an imaging device configured with a plurality of photoelectric conversion elements.
従来のこの種の装置は第１回し）に示す如く、レンズと
光電変換素子を一組として複数組で構成さｎていた。As shown in Part 1), a conventional device of this type is composed of a plurality of sets each including a lens and a photoelectric conversion element.
一般に、との光電変換素子としては、例えばＣＣＤ（電
荷結合素子）が使用さしている。現在商業的に利用可能
なＣＣＤは２０４８ ビットのものがある。Generally, as a photoelectric conversion element, for example, a CCD (charge coupled device) is used. There are currently 2048 bit CCDs available commercially.
これを用いて８４版の原稿を読取ると解像度は８ビット
／ｍｍとなり粗いものとなる。そこで解像度ヲ高めるた
めに２０４８ビツトのＣＣＤを２個用いて８４版原稿を
１６ビツ）７ｍｍで、父はＡ３版原稿を１３ビツト／朋
で読取るようにしている。こｎについては例えば特願昭
５３−１．２１．．８０５に開示さｎている。この種の
装置は構成上価格が上がるばかりか、さらに重要な問題
は、光電変換素子の原稿読取り上のつなぎ目に対応する
原稿面が原稿載置ガラス板から浮き上がっていると、そ
の部分の原稿を二重に読取ってしまうということである
。If an 84-version original is read using this, the resolution will be 8 bits/mm and will be coarse. Therefore, in order to increase the resolution, two 2048-bit CCDs are used to read 84-size manuscripts at 16 bits/7mm, and my father reads A3-size manuscripts at 13 bits/7mm. Regarding this, for example, Japanese Patent Application No. 53-1.21. ．． 805. Not only is this type of device expensive due to its configuration, but an even more important problem is that if the document surface corresponding to the joint in the document reading area of the photoelectric conversion element is lifted from the document placement glass plate, that portion of the document will be removed. This means that it is read twice.
こ扛を第１図（ａ） 、 （＋））で説明する。通常、
原稿４は原稿載置ガラス板５に密着さしゃこの時、原稿
４のＸａの範囲の画像はレンズ１ａを通って光電変換素
子２ａに投影さｎｌ一方原稿４のｘｂの範囲の画像はレ
ンズ１ｂを通って光電変換素子２ｂに投影さｎ光電変換
素子２ａ 、２ｂによって原稿４の金山が読取らｎる。This method will be explained with reference to Fig. 1 (a) and (+)). usually,
When the original 4 is brought into close contact with the original glass plate 5, the image in the range Xa of the original 4 is projected onto the photoelectric conversion element 2a through the lens 1a, while the image in the range xb of the original 4 is projected onto the photoelectric conversion element 2a through the lens 1a. The gold spots on the original 4 are then projected onto the photoelectric conversion element 2b and read by the photoelectric conversion elements 2a and 2b.
ところが、第１図（ｂ）に示す如く、原稿４がガラス板
５よりΔ１１だけ浮き上がって載置さ肚ると、原稿４の
△Ｓの領域の画像はレンズ１ａを通って光電変換素子２
ａに投影さ扛ると同時に、レンズ１ｂを通って光電変換
素子２ｂにも投影されてし捷い、従って二重に読取らし
ることになる。この状態で光電変換素子２ａ 。However, as shown in FIG. 1(b), when the original 4 is lifted up from the glass plate 5 by Δ11 and placed, the image of the area ΔS of the original 4 passes through the lens 1a and is transferred to the photoelectric conversion element 2.
At the same time as the light is projected onto the photoelectric conversion element 2b through the lens 1b, the light is read out twice. In this state, the photoelectric conversion element 2a.
２ｂを走査しファクシミリや複写機のようにコピーをと
ると△Ｓの領域の画像が二重読取り画像としてコピーさ
扛てしまう。この二重読取り巾△Ｓは、半画角をθ、原
稿の浮き上りを△１１とするとΔｓ ＝ ２・△ｈｅｌ
Ａｆｌθ で力えら肚る。第２図（ａ）は正常な場合の
コピー例、第２図（ｂ）は二重読取り画像のコピーの例
を示す。If 2b is scanned and a copy is made using a facsimile or a copying machine, the image in the ΔS area will be copied as a double-read image. This double reading width △S is calculated as follows: Δs = 2・△hel
Aflθ makes me sad. FIG. 2(a) shows an example of copying in a normal case, and FIG. 2(b) shows an example of copying a double-read image.
本発明は、このような二重読取りがなく解像度を向上で
きるようにすることを目的とし、原稿画像光を収束する
ための１個のレンズと、該レンズの収束光路上に配設さ
するハーフミラ−と、該ハーフミラ−による透過収束光
を″□光電変換するだめの第１の光電変換素子と反射収
束光を光電変換するだめの第２の光電変換素子とが交互
に置設さ扛徴とする撮像装置を提供するものである。The present invention aims to improve the resolution without such double reading, and includes a lens for converging document image light and a half mirror disposed on the converging optical path of the lens. - and a first photoelectric conversion element for photoelectrically converting the transmitted convergent light by the half mirror and a second photoelectric conversion element for photoelectrically converting the reflected convergent light are arranged alternately. The present invention provides an imaging device that performs the following functions.
以下、図面について詳細に説明する。The drawings will be described in detail below.
第３図は本発明の撮像装置の一実施例であって。FIG. 3 shows an embodiment of the imaging device of the present invention.
■はレンズ、２ａ、２１）は光電変換素子、３はノ・−
フミラー、４は原稿、５は原稿載置ガラス板、６はラン
プ、７はミラーである。■ is a lens, 2a, 21) is a photoelectric conversion element, 3 is a -
4 is a document, 5 is a glass plate for placing the document, 6 is a lamp, and 7 is a mirror.
原稿載置ガラス板５上にコピーしたい画像面を下向きに
原稿４が載置さし、一方光路を遮らないようにかつ厚み
のある原稿の周辺にできる影を除去するため通常は１対
或いは反射板と対をなして（図示せず）配設さｎたラン
プ６によって下方より原稿４を照射する。原稿面から反
射さ扛た画像光は反射ミラー７によって反射さした後、
レンズ１を通過する画像光のみが収束さｎなからノ・−
フミラー３に至る。この反射ミラー７は光学系をコンパ
クトにするために設けらしたものでありスペースが許せ
ば省略できる。ノ・−フミラー３に達した収束画像光は
ハーフミラ−３によって透過光と反射光に分かｎ原稿４
のＯＡ分は光電変換素子２ａ ３−
の０ＩＡＩに、０８分は光電変換素子２ｂの０１Ｂ１に
実像を結ぶ。との時、０１及び０１１は図から明らかな
ように光軸が互いに共有することになり、従来の二重読
取りを除去できる。このことを本実施例の概略構成図第
４図（ａ）及び第４図（ｂ）で更に詳述する。The original 4 is placed on the original placing glass plate 5 with the image surface to be copied facing downward, and usually one pair or a reflective plate is placed so as not to block the optical path and to remove shadows that may appear around the thick original. The document 4 is irradiated from below by a lamp 6 arranged in a pair with the plate (not shown). After the image light reflected from the document surface is reflected by the reflection mirror 7,
Only the image light passing through lens 1 is converged.
This brings us to Humira 3. This reflecting mirror 7 is provided to make the optical system compact, and can be omitted if space permits. The convergent image light that has reached the half mirror 3 is divided into transmitted light and reflected light by the half mirror 3.
A real image is formed at the OA portion of the photoelectric conversion element 2a 3- at 0IAI, and a real image is formed at the 08 minute point at 01B1 of the photoelectric conversion element 2b. As is clear from the figure, when 01 and 011 share the optical axis with each other, the conventional double reading can be eliminated. This will be explained in more detail with reference to FIGS. 4(a) and 4(b), which are schematic configuration diagrams of this embodiment.
第４図（ａ） 、 （ｂ）は模型的に示してあり、第３
図のランプ６、反射ミラー７は省略した。ハーフミラ−
３は適当に傾斜（例えば４．５ ″）に配設さｎ、光電
変換素子２ａは平面に配置さｎ（背面が描かｎている）
、光電変換素子２ｂは立面に配置さｎ（上側面が描かし
ている）ている。第４図（ａ）は原稿４が原稿載置ガラ
ス板５に密着載置さｎた状態を示し、この状態での読取
り画像は第２図（ａ）と同様に正常な像として得ら扛る
。Figures 4(a) and 4(b) are shown schematically, and the third
The lamp 6 and reflection mirror 7 in the figure are omitted. half mirror
3 is arranged at an appropriate inclination (for example, 4.5''), and the photoelectric conversion element 2a is arranged on a flat surface (the back side is shown).
, the photoelectric conversion element 2b is arranged vertically (the upper side is drawn). FIG. 4(a) shows a state in which the original 4 is placed in close contact with the original placing glass plate 5, and the read image in this state is not obtained as a normal image as in FIG. 2(a). Ru.
一方、第４図（ｂ）は第１図（ｂ）と同様に原稿４がガ
ラス板５からΔｈだけ浮いた状態を示しである。この場
合も原稿画像光のそｎぞｎの光電変換素子へ分割さｎだ
部分の光軸が共有であるため第１図（ｂ）に現わ肚たΔ
Ｓなる二重読取り部は生せず第２図４−
（ａ）と同様に正常な像として読取ら詐る。On the other hand, FIG. 4(b) shows a state in which the original 4 is lifted from the glass plate 5 by Δh, similar to FIG. 1(b). In this case as well, since the optical axis of the n portions in which the original image light is divided into the n photoelectric conversion elements is shared, the difference Δ shown in FIG.
A double reading section S does not occur and the image is falsely read as a normal image as in FIG. 2-4-(a).
第５図及び第６図は本発明の撮像装置の他の実施例であ
り、第５図は光電変換素子を３個使用した場合の例で、
第６図は９個使用した場合であるがレンズ１の性能が許
せば光電変換素子は任意に数を選ぶことができるため解
像力の向」二が容易に達成さｎる。当然こし等の場合も
二重読取りという従来の欠点は除去できる。FIGS. 5 and 6 show other embodiments of the imaging device of the present invention, and FIG. 5 is an example in which three photoelectric conversion elements are used.
Although FIG. 6 shows the case where nine photoelectric conversion elements are used, if the performance of the lens 1 permits, the number of photoelectric conversion elements can be arbitrarily selected, and therefore the resolution can be easily achieved. Naturally, the conventional drawback of double reading can also be eliminated in cases such as a strainer.
第７図は光電変換素子（ＣＣＤ イメージセンサ）を
２個使用した、つまり第３図のような構成における撮像
装置の制御回路ブロック図である。第８図はそのタイミ
ングチャートである。操作パネルのスイッチ（図示せず
）又は適当な処理装置（図示せず）から撮像開始信号を
受けるとＣＣＤスタートストップ論理回路１１はクロッ
ク回路１２よりのクロックパルスを受は画像読取り制御
を開始する。ＣＣＤ制御回路１３．１４は適当なタイミ
ングでＣＣＤイメージセンサ２ａ 、 ２ｂに種々のパ
ルス、例えば転送ハルス、転送ゲートパルス、リセット
パルス等を供給する。こｔ等のパルスはＣＣＤ制御回路
１３゜１４に含ましるＣＣＤドライバを経由してＣＣＤ
イメージセンサ２ａ、２ｂに供給さ牡、ビデオ出力がＣ
ＣＤイメージセンサ２ａ、２ｂによりそｔぞ几出力さ扛
る。FIG. 7 is a control circuit block diagram of an imaging apparatus using two photoelectric conversion elements (CCD image sensors), that is, in the configuration shown in FIG. 3. FIG. 8 is a timing chart thereof. Upon receiving an imaging start signal from a switch on the operation panel (not shown) or a suitable processing device (not shown), the CCD start/stop logic circuit 11 receives clock pulses from the clock circuit 12 and starts image reading control. The CCD control circuits 13 and 14 supply various pulses, such as transfer Hals, transfer gate pulses, and reset pulses, to the CCD image sensors 2a and 2b at appropriate timings. These pulses are sent to the CCD via the CCD driver included in the CCD control circuit 13 and 14.
The video output is supplied to the image sensors 2a and 2b.
The CD image sensors 2a and 2b directly output the data.
こ扛等のビデオ出力はヒデオアンプ１５．１６ 、サン
プルホールド回路１．７，１８ 、アンプ１９．２０を
経てアナログスイッチ２１によってＣＣＤイメージセン
サ２ａとＣＣＤイメージセンサ２ｂとのビデオ出力かつ
なき合わさして連続的な画信号になる。The video outputs of these devices pass through a video amplifier 15.16, a sample hold circuit 1.7, 18, and an amplifier 19.20, and then are connected to the video outputs of the CCD image sensor 2a and the CCD image sensor 2b by an analog switch 21 and are continuously output. It becomes a picture signal.
各走査行のスタートを示す行インデックス信号に続いて
ＣＣＤ （１）制御回路１３がまずＣ’ＣＤイメージセ
ンサ２ａを駆動して、例えば２０４８ビツトのビデオ出
力を取出す。Following a row index signal indicating the start of each scanning row, the CCD (1) control circuit 13 first drives the C'CD image sensor 2a to take out, for example, a 2048-bit video output.
続いてクロックパルスをＮ１個数えたタイミングでＣＣ
Ｄ （２）制御回路１４がＣＣＤイメージセンサ２ｂを
駆動して同様に、例えば２０４８ビツトのビデオ出力を
取出す。Then, at the timing when N1 clock pulses are counted, CC is
D (2) The control circuit 14 drives the CCD image sensor 2b and similarly takes out, for example, a 2048-bit video output.
ＣＣＤスタートストップ論理回路１１はクロックパフ、
７２Ｎ２イ、ええ、イオ７ノ忰アカ。え、イッチ２１
を切替えてＣＣＤイメージセンサ２ａのビデオ出力とＣ
ＣＤイメージセンサ２ｂのビデオ出力とを接続して連続
的な１行の画信号とする。The CCD start/stop logic circuit 11 is a clock puff,
72N2i, yeah, Io7nohanaka. Eh, Itch 21
The video output of the CCD image sensor 2a and C
It is connected to the video output of the CD image sensor 2b to form a continuous one-line image signal.
ここでＣＣＤイメージセンサ２ａのビデオ出力の一部と
ＣＣＤイメージセンサ２ｂのビデオ出力との一部がオー
バラップするようにＣＣＤイメージセンサ２ａ、２ｂを
配置する。その配置状況を第９図に示す。原稿４の画面
上Ｘ１の部分はＣＣＤイメージセンサ２ａのａｌとＣＣ
Ｄイメージセンサ２ｂのｂｌとに、Ｎ２の部分はＣＣＤ
イメージセンサ２ｂのａ２゜ｂ２とに結像さｎる。第３
図に示すように、イメージセンサ２ａ、２ｂは立体的に
配置さｎているから、このように画像をオーバラップし
て結像させることができる。そして、第９図の斜線の部
分３１゜３２０ビデオ出力を捨てる。斜線部３１は例え
ば４８ビツトで、斜線部３２も例えば４８ビツトとする
と、１行の画信号４０９６ビツトの内有効なのは４００
０ビツトとなる。Ｎ１は２０４８−４８Ｘ２−１９５２
であり、Ｎ２は２０００となる。ＣＣＤイメージセンサ
２ａ、２ｂ′楔のＸ方向の位置を調整して捨てる部分３
１． 、３２をＯビットにすることも可能である。一般
にＣＣＤイメージセンサは歩留りの関係７−
上パッケージの外形と有効素子部との寸法関係に精度を
要求しないほうがよいので、典型的な設計値ヲこのよう
にオーバラップするように取す、Ｎｌ。Here, the CCD image sensors 2a and 2b are arranged so that a part of the video output of the CCD image sensor 2a and a part of the video output of the CCD image sensor 2b overlap. The arrangement situation is shown in Fig. 9. The part X1 on the screen of the original 4 is the al and CC of the CCD image sensor 2a.
bl of the D image sensor 2b, and the N2 part is a CCD.
An image is formed on a2° and b2 of the image sensor 2b. Third
As shown in the figure, since the image sensors 2a and 2b are arranged three-dimensionally, it is possible to form overlapping images in this way. Then, the shaded portion 31°320 video output in FIG. 9 is discarded. If the shaded area 31 is, for example, 48 bits, and the shaded area 32 is also, for example, 48 bits, then only 400 of the 4096 bits of the image signal in one row are valid.
It becomes 0 bit. N1 is 2048-48X2-1952
Therefore, N2 is 2000. Adjust the position of the CCD image sensor 2a, 2b' wedge in the X direction and discard the part 3
1. , 32 may be O bits. In general, CCD image sensors have a yield relationship 7- Since it is better not to require precision in the dimensional relationship between the outer shape of the package and the effective element portion, the typical design values are set so that they overlap as shown above, Nl.
Ｎ２の数値に電気的かつ機械的に若干の町変し５をもつ
のが望ましい。It is desirable to have a slight electrical and mechanical change in the value of N2.
ここに示した数値は説明の簡単化のために用いたもので
、実際はＣＣＤイメージセンサの特性上ダミービットが
あったり余分のシフトパルスを必要としたりする。その
詳細は当事者が容易に理解できるので省略する。The numerical values shown here are used to simplify the explanation; in reality, due to the characteristics of the CCD image sensor, there may be dummy bits or extra shift pulses may be required. The details are omitted as they can be easily understood by those involved.
以上説明したように、画像収束用レンズを１個としハー
フミラ−にて収束光を分割し、その分割さ扛た収束光を
複数の光電変換素子で受光することにしたので原稿浮き
でも二重読取りがなくしかも安価で容易に解像度の向上
が実現できる。As explained above, we decided to use one lens for image convergence, divide the convergent light with a half mirror, and receive the divided convergent light with multiple photoelectric conversion elements, so even if the original is floating, double reading is possible. In addition, the resolution can be easily improved at low cost.
第１図（ａ） 、 （ｂ）は従来の撮像装置の構成例、
第２図（ａ） ｔ （ｂ）は二重読取りを説明するだめ
のコピー例、第３図は本発明の撮像装置の一実施例、第
４図（ａ）。
８−
（ｂ）は本発明実施例の概略構成図、第５図、第６図は
本発明の撮像装置の他の実施例、第７図は本発明の撮像
装置の制御ブロック図の一例、第８図はタイムチャート
、第９図は本発明の撮像装置の別の実施例を示す。
特許出願人 岩崎通信機株式会社FIGS. 1(a) and 1(b) are configuration examples of conventional imaging devices,
FIGS. 2(a) and 2(b) show an example of copying to explain double reading, FIG. 3 shows an embodiment of the imaging device of the present invention, and FIG. 4(a) shows an example of copying. 8-(b) is a schematic configuration diagram of an embodiment of the present invention, FIGS. 5 and 6 are other embodiments of the imaging device of the present invention, and FIG. 7 is an example of a control block diagram of the imaging device of the present invention. FIG. 8 shows a time chart, and FIG. 9 shows another embodiment of the imaging apparatus of the present invention. Patent applicant Iwasaki Tsushinki Co., Ltd.
Claims (1)
の収束光路上に配設さ几るハーフミラ−と、該ハーフミ
ラ−による透過収束光を光電変換するための第１の光電
変換素子と反射収束光を光電変換するだめの第２の光電
変換素子とが交互に配設さ扛てなる複数の光電変換素子
とを具備したことを特徴とする撮像装置。a lens for converging document image light, a half mirror disposed on the converging optical path of the lens, and a first photoelectric conversion element for photoelectrically converting the convergent light transmitted by the half mirror. An imaging device comprising a plurality of photoelectric conversion elements alternately arranged with second photoelectric conversion elements for photoelectrically converting reflected convergent light.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57086318A JPS58202661A (en) | 1982-05-21 | 1982-05-21 | Image pickup device |
| GB08313173A GB2122048A (en) | 1982-05-21 | 1983-05-13 | Image pickup apparatus |
| DE19833318189 DE3318189A1 (en) | 1982-05-21 | 1983-05-19 | IMAGE RECORDING DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57086318A JPS58202661A (en) | 1982-05-21 | 1982-05-21 | Image pickup device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58202661A true JPS58202661A (en) | 1983-11-25 |
Family
ID=13883480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57086318A Pending JPS58202661A (en) | 1982-05-21 | 1982-05-21 | Image pickup device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS58202661A (en) |
| DE (1) | DE3318189A1 (en) |
| GB (1) | GB2122048A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60247369A (en) * | 1984-05-23 | 1985-12-07 | Dainippon Screen Mfg Co Ltd | Method and device for improving resolution of array sensor |
| CA1263175A (en) * | 1984-05-28 | 1989-11-21 | Hideyuki Miyazawa | Image reader for image processing apparatus |
| JPH0614658B2 (en) * | 1985-08-20 | 1994-02-23 | 大日本スクリ−ン製造株式会社 | Image reader |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4005285A (en) * | 1975-10-30 | 1977-01-25 | Xerox Corporation | Optical system for extending photosensor array resolution |
| US4092632A (en) * | 1977-05-02 | 1978-05-30 | Xerox Corporation | Crossover arrangement for multiple scanning arrays |
| US4249217A (en) * | 1979-05-29 | 1981-02-03 | International Business Machines Corporation | Separated sensor array abutment |
-
1982
- 1982-05-21 JP JP57086318A patent/JPS58202661A/en active Pending
-
1983
- 1983-05-13 GB GB08313173A patent/GB2122048A/en not_active Withdrawn
- 1983-05-19 DE DE19833318189 patent/DE3318189A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| GB8313173D0 (en) | 1983-06-22 |
| DE3318189A1 (en) | 1983-11-24 |
| GB2122048A (en) | 1984-01-04 |
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