JPS6236958A - Picture reader - Google Patents
Picture readerInfo
- Publication number
- JPS6236958A JPS6236958A JP60176612A JP17661285A JPS6236958A JP S6236958 A JPS6236958 A JP S6236958A JP 60176612 A JP60176612 A JP 60176612A JP 17661285 A JP17661285 A JP 17661285A JP S6236958 A JPS6236958 A JP S6236958A
- Authority
- JP
- Japan
- Prior art keywords
- optical sensor
- light
- original
- light source
- cdse
- 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.)
- Granted
Links
Landscapes
- Facsimile Scanning Arrangements (AREA)
- Facsimile Heads (AREA)
Abstract
Description
【発明の詳細な説明】
2“−/゛
産業上の利用分野
本発明は、ファクシミリなど各種のOA機器に用いられ
る原稿の幅と同一寸法を有する高速読取を可能にした画
像読取装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION 2"-/゛Field of Industrial Application The present invention relates to an image reading device that is capable of high-speed reading and has the same dimensions as the width of a document used in various office automation equipment such as facsimiles. be.
従来の技術
従来、この種の画像読取装置では、センサとして光電流
が大きく回路構成が簡単なCd5−CdSe固溶体を用
いたものが実用化されているが、このセンサの光応答速
度が遅いためA4版(8素子/聴、1728素子)で1
0 m see / 71 i ne程度と読取速度が
遅いという欠点があった。そのため、例えば特願昭59
−181751に示されている様に、バイアス光を加え
て高速読取を可能にする改良がなされた。Conventional technology Conventionally, in this type of image reading device, a sensor using a Cd5-CdSe solid solution with a large photocurrent and a simple circuit configuration has been put into practical use, but the light response speed of this sensor is slow, so A4 1 in version (8 elements/listening, 1728 elements)
There was a drawback that the reading speed was slow at about 0 m see / 71 ine. Therefore, for example,
-181751, an improvement was made to enable high-speed reading by adding bias light.
すなわち、線状光源で原稿を照射し、その反射光を集束
性フフイバアレイで光センサ上に結像し原稿の情報を読
み取るに際して、光センサの光応答速度を改善するため
に、別に設けた線状光源の光をバイアス光として光セン
サ上に直接照射し、前述の原稿からの反射光に重畳する
ことにより、3べ−7
光センサの応答速度を速くして、高速度の画像読み取り
を可能とする構造となっている。In other words, in order to improve the optical response speed of the optical sensor, when the original is irradiated with a linear light source and the reflected light is imaged onto the optical sensor using a focusing fiber array to read the information on the original, a separate linear light source is used to improve the optical response speed of the optical sensor. By directly irradiating the light from the light source as bias light onto the optical sensor and superimposing it on the light reflected from the document mentioned above, the response speed of the optical sensor is increased and high-speed image reading is possible. The structure is such that
すなわち、光センサとしてCdS、CdSeあるいは固
溶体Cd5−CdSeなどの光導電性薄膜を用いた場合
の応答速度は5 m ICC程度であり、このセンサに
バイアス光を附加して4m4程度に高速化できるもので
ある。In other words, when a photoconductive thin film such as CdS, CdSe, or solid solution Cd5-CdSe is used as an optical sensor, the response speed is about 5 m ICC, and the response speed can be increased to about 4 m4 by adding bias light to this sensor. It is.
発明が解決しようとする問題点
しかし、このような従来の方式では、バイアス光を照射
しても光応答速度が1m5eC程度であり、これ以上速
くすることは、光源を明るくすること以外には方法がな
いという問題点があった。Problems to be Solved by the Invention However, in such a conventional method, the optical response speed is about 1 m5eC even when bias light is irradiated, and there is no way to increase it faster than this other than by making the light source brighter. The problem was that there was no.
また、バイアス光源として、例えば高価な黄緑色LED
アレイを2本も用いるなど、コストの面でも問題があっ
た。In addition, as a bias light source, for example, an expensive yellow-green LED can be used.
There were also problems in terms of cost, as two arrays were used.
本発明は安価な光源を用いて、かつ容易に高速読み取り
ができる画像読取装置を提供することを目的としている
。An object of the present invention is to provide an image reading device that uses an inexpensive light source and can easily perform high-speed reading.
問題点を解決するための手段
本発明は、光センサをバイアス光用としての可視光源で
定常的に一様に照射しておき、別の赤外光源で原稿を照
射し、原稿からの反射光を集束性ファイバアレイで光セ
ンサ上に結像するものである。Means for Solving the Problems In the present invention, an optical sensor is constantly and uniformly irradiated with a visible light source for bias light, and a document is irradiated with another infrared light source, and the reflected light from the document is is imaged onto an optical sensor using a focusing fiber array.
作 用
本発明は、光導電性光センサの光電流が適当な波長域の
赤外光照射によって減少する現象を利用しており、上記
の構成とすることにより画信号を高速度で検知すること
ができる。Function The present invention utilizes the phenomenon that the photocurrent of a photoconductive optical sensor is reduced by irradiation with infrared light in an appropriate wavelength range, and with the above configuration, image signals can be detected at high speed. I can do it.
実施例
図は本発明の画像読取装置の一実施例を示す副走査方向
の断面図である。CdS、CdSeや固溶体Cd5−C
dSeなどの光導電体から成る光センサ1を主走査方向
に例えば8素子/喘の密度でA4版で1728素子形成
し、この光センサ1を、線状可視光源4例えばLEDア
レイなどで光センサ1の分光感度に適した波長の光を用
いて一様に定常的にバイアス光として照射する。一方、
線状赤外光源5により1〜3μm程度の波長の光で原稿
面6を照射する。原稿6からの反射光3が、光集束5ペ
ージ
性ファイバアレイ2に入射し、光センサ1上に原稿の像
を結像させる構造である。The embodiment diagram is a sectional view in the sub-scanning direction showing an embodiment of the image reading device of the present invention. CdS, CdSe and solid solution Cd5-C
An optical sensor 1 made of a photoconductor such as dSe is formed with 1728 elements on an A4 sheet at a density of 8 elements/pan in the main scanning direction, and this optical sensor 1 is converted into an optical sensor using a linear visible light source 4 such as an LED array. It is uniformly and constantly irradiated as bias light using light of a wavelength suitable for the spectral sensitivity of 1. on the other hand,
A linear infrared light source 5 irradiates the document surface 6 with light having a wavelength of about 1 to 3 μm. The structure is such that the reflected light 3 from the original 6 is incident on the light-converging five-page fiber array 2, and an image of the original is formed on the optical sensor 1.
ここで、バイアス光8の光強度は、CdS。Here, the light intensity of the bias light 8 is CdS.
CdSeあるいは固溶体Cd5−CdSeを主体として
成る光センサの場合、光センサ1面で30〜3o○ルッ
クス程度である。読取回路で必要な光電流が得られる1
00ルツクス以下の方が、照射赤外光量が少なくて済む
。線状赤外光源5による1〜3pm程度の波長の赤外光
量は、原稿6の白地による反射光3の光センサ1上での
結像で得られる光電流の減少が、定常光電流を100と
して、50〜100である。この読取装置により原稿の
白・黒の信号を高速に読み取ることができる。従来、6
m sec / l i ne程度の速度が、1/1o
〜1/2Qの高速で読み取りが可能となる。In the case of an optical sensor mainly composed of CdSe or solid solution Cd5-CdSe, the light intensity on one side of the optical sensor is about 30 to 3 o lux. The photocurrent required by the reading circuit can be obtained1
00 lux or less requires less irradiation infrared light. The amount of infrared light with a wavelength of about 1 to 3 pm from the linear infrared light source 5 is such that the reduction in photocurrent obtained by imaging the reflected light 3 from the white background of the document 6 on the optical sensor 1 increases the steady photocurrent by 100 pm. As, it is 50-100. This reading device can read the white and black signals of a document at high speed. Conventionally, 6
The speed of about m sec / line is 1/1o
It becomes possible to read at a high speed of ~1/2Q.
ここに線状可視光源としては、低発光効率のLED、E
Lなどの固体光源で済み、また線状赤外光源としては1
〜3/l1m程度の発光効率の大きなW灯で良く、何れ
も安価である。Here, as a linear visible light source, an LED with low luminous efficiency, E
A solid light source such as L is sufficient, and a linear infrared light source is 1
A W lamp with a high luminous efficiency of about ~3/l1m may be sufficient, and both are inexpensive.
発明の効果
6へ−〉゛
以上述べた様に、本発明によれば、線状の可視光源と赤
外光源を併用して構成してなる画像読取装置であり、安
価で、しかも高速で画像が読み取れるという工業上極め
て有用な効果を奏する。Effect 6 of the Invention -> As described above, the present invention provides an image reading device configured by using both a linear visible light source and an infrared light source, and is capable of capturing images at low cost and at high speed. It has an extremely useful effect industrially in that it can be read.
【図面の簡単な説明】
図は本発明の一実施例における画像読取装置の断面図で
ある。
1・・・・・光センサ、2・・・・・・光集束性ファイ
バアレイ、3・・・・・反射光、4・・印・バイアス光
用可視光源、5・・・・・線状赤外光源、6・・・・・
・原稿、8・・団バイアス光、9・・・・・バイアス用
光源。BRIEF DESCRIPTION OF THE DRAWINGS The figure is a sectional view of an image reading device according to an embodiment of the present invention. 1... Optical sensor, 2... Light focusing fiber array, 3... Reflected light, 4... Visible light source for mark/bias light, 5... Linear Infrared light source, 6...
- Original, 8... group bias light, 9... bias light source.
Claims (3)
様に定常的に照射するバイアス光用線状可視光源と、原
稿を照射する線状赤外光源と、原稿からの反射赤外光を
光センサアレイに結像する集束性ファイバアレイを有す
ることを特徴とする画像読取装置。(1) An optical sensor array formed on a substrate, a linear visible light source for bias light that uniformly and constantly irradiates the optical sensor array, a linear infrared light source that irradiates the original, and an infrared light reflected from the original. An image reading device comprising a focusing fiber array that focuses light onto a photosensor array.
溶体CdS−CdSeを主体とする光センサで構成され
ていることを特徴とする特許請求の範囲第1項記載の画
像読取装置。(2) The image reading device according to claim 1, wherein the optical sensor array is composed of optical sensors mainly made of CdS, CdSe, or solid solution CdS-CdSe.
100とした時、原稿からの反射赤外光の最大強度によ
る光電流の減少が50以上であることを特徴とする特許
請求の範囲第1項あるいは第2項の何れかに記載の画像
読取装置。(3) On the optical sensor surface, when the photocurrent due to steady visible light is taken as 100, the reduction in photocurrent due to the maximum intensity of reflected infrared light from the original is 50 or more. The image reading device according to either item 1 or item 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60176612A JPS6236958A (en) | 1985-08-09 | 1985-08-09 | Picture reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60176612A JPS6236958A (en) | 1985-08-09 | 1985-08-09 | Picture reader |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6236958A true JPS6236958A (en) | 1987-02-17 |
JPH0583024B2 JPH0583024B2 (en) | 1993-11-24 |
Family
ID=16016610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60176612A Granted JPS6236958A (en) | 1985-08-09 | 1985-08-09 | Picture reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6236958A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63234667A (en) * | 1987-03-23 | 1988-09-29 | Canon Inc | Original reader |
-
1985
- 1985-08-09 JP JP60176612A patent/JPS6236958A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63234667A (en) * | 1987-03-23 | 1988-09-29 | Canon Inc | Original reader |
Also Published As
Publication number | Publication date |
---|---|
JPH0583024B2 (en) | 1993-11-24 |
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