JPH04128737A - Method for measuring transmittance of original of diazo copying machine - Google Patents
Method for measuring transmittance of original of diazo copying machineInfo
- Publication number
- JPH04128737A JPH04128737A JP24876990A JP24876990A JPH04128737A JP H04128737 A JPH04128737 A JP H04128737A JP 24876990 A JP24876990 A JP 24876990A JP 24876990 A JP24876990 A JP 24876990A JP H04128737 A JPH04128737 A JP H04128737A
- Authority
- JP
- Japan
- Prior art keywords
- document
- original
- light amount
- light
- transmittance
- 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
- 238000002834 transmittance Methods 0.000 title claims abstract description 31
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 6
- 238000001514 detection method Methods 0.000 claims description 38
- 238000003780 insertion Methods 0.000 claims description 13
- 230000037431 insertion Effects 0.000 claims description 13
- 238000000691 measurement method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Control Of Exposure In Printing And Copying (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はジアゾ複写機の原稿透過率測定方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for measuring document transmittance in a diazo copying machine.
従来より、光源光量Ｉ０と透過光量Ｉとにより原稿透過
率ＣＩ／Ｉ。）を測定し、この原稿透過率に基づいて焼
付速度を制御するジアゾ複写機か知られている。Conventionally, the original transmittance CI/I is determined by the light source light amount I0 and the transmitted light amount I. ) and controls the printing speed based on the original transmittance.
第２図に従来のジアゾ複写機の原稿透過率測定方法に用
いられる原稿透過光量検出装置の概略を示す。FIG. 2 schematically shows an apparatus for detecting the amount of light transmitted through an original used in a conventional method for measuring the transmittance of an original in a diazo copying machine.
この原稿透過光量検出装置は、複写機の給紙台９０上に
配置され、原稿を挿入するためのギャップＧを介して互
いに対向するよう設けた光源１１および光量センサー１
２よりなる光量検出部ＩＯと、光量検出部ＩＯより原稿
挿入方向後方（図面の左側）に設けた原稿検知手段５０
とを有している。This original transmitted light amount detection device is arranged on a paper feed table 90 of a copying machine, and includes a light source 11 and a light amount sensor 1 that are arranged to face each other with a gap G for inserting the original.
2, and a document detection means 50 provided behind the light amount detection section IO in the document insertion direction (on the left side of the drawing).
It has
光源１１は複写機の給紙台９０に埋め込まれるように設
けられ、光量センサー１２および原稿検知手段５０は対
向部材４０に設けられている。The light source 11 is provided so as to be embedded in the paper feed table 90 of the copying machine, and the light amount sensor 12 and the document detection means 50 are provided in the opposing member 40.
光量検出部ＩＯは常に動作状態に保持され、一定の時間
間隔で光量を検出し、検出した光量値を更新している。The light amount detection unit IO is always kept in an operating state, detects the amount of light at regular time intervals, and updates the detected light amount value.
原稿透過率の測定は下記のようにして行われる。Measurement of document transmittance is performed as follows.
■光源１１と光量センサー１２とのギャップＧに原稿が
挿入されていないときに光量検出部ＩＯにより検出され
た光量を、光源光量Ｉ０として記憶させる。(2) The light amount detected by the light amount detection section IO when no document is inserted into the gap G between the light source 11 and the light amount sensor 12 is stored as the light source light amount I0.
■原稿挿入方向（矢印で示す。）に沿ってギャップＧに
原稿の地の部分（非画像部）を挿入する。(2) Insert the ground part (non-image part) of the original into the gap G along the original insertion direction (indicated by the arrow).
挿入された原稿の先端が原稿検知手段５０により検知さ
れたときに光量検出部ｌＯにより検出された光量を、透
過光量■として記憶させる。The amount of light detected by the light amount detection unit IO when the leading edge of the inserted document is detected by the document detection means 50 is stored as the amount of transmitted light (2).
■記憶させた光源光量Ｉ０と透過光量Ｉとにより原稿透
過率（１／Ｉ。）か測定される。(2) The original transmittance (1/I.) is measured using the stored light source light amount I0 and transmitted light amount I.
しかし、上記のような原稿透過率測定方法においては、
光源光量■。を記憶させてから透過光量Ｉを記憶させる
までに経過する時間か不定であって、ある程度の長い時
間か経過する場合かあるか、この場合において、温度等
の影響により光源光量Ｉ０か経時的に変動すると正確な
原稿透過率の測定ができない、という問題かある。However, in the original transmittance measurement method as described above,
Light source light intensity■. The amount of time that elapses from memorizing the amount of transmitted light I to memorizing it is undefined, and it may take a certain amount of time to memorize it. There is a problem in that if it fluctuates, it is not possible to accurately measure the original transmittance.
本発明は以上のような事情に基づいてなされたものであ
って、その目的は、正確な原稿透過率を測定できるジア
ゾ複写機の原稿透過率測定方法を提供することにある。The present invention has been made based on the above-mentioned circumstances, and an object thereof is to provide a method for measuring document transmittance of a diazo copying machine that can accurately measure document transmittance.
上記目的を達成するため、本発明のジアゾ複写機の原稿
透過率測定方法は、原稿挿入ギャップを介して互いに対
向するよう設けた光源および光量センサーよりなる光量
検出部と、前記光量検出部より原稿挿入方向前方に設け
た第１の原稿検知手段と、前記光量検出部より原稿挿入
方向後方に設けた第２の原稿検知手段とを有してなる原
稿透過光量検出装置を用い、前記光量検出部は常に動作
状態に保持され、前記第１の原稿検知手段か原稿を検知
したときに検出された光量を光源光量■。In order to achieve the above object, the original transmittance measurement method for a diazo copying machine according to the present invention includes: a light amount detection section consisting of a light source and a light amount sensor provided so as to face each other across a document insertion gap; A document transmitted light amount detecting device including a first document detecting means provided at the front in the insertion direction and a second document detecting means provided at the rear in the document insertion direction from the light amount detecting section is used. is always kept in an operating state, and the amount of light detected when the first document detection means detects the document is the light source light amount (2).
とじて記憶し、前記第２の原稿検知手段か原稿を検知し
たときに検出された光量を透過光量■として記憶し、記
憶された光源光量Ｉ０と透過光量Ｉとにより、挿入され
た原稿の原稿透過率を測定することを特徴とする。The amount of light detected when the second document detecting means detects the document is stored as the amount of transmitted light ■, and the amount of the inserted document is determined by the stored light source light amount I0 and the amount of transmitted light I. It is characterized by measuring transmittance.
光源光量■。を記憶してから透過光量■を記憶するまで
の時間は、操作者が装置内に原稿を挿入する動作による
極めて短い時間であり、原稿が挿入される直前の光量が
光源光量Ｉ０とじて記憶されるので、測定された原稿透
過率は正確なものとなる。Light source light intensity■. The time from when is memorized to when the amount of transmitted light ■ is stored is an extremely short time due to the operation of the operator inserting the document into the device, and the amount of light immediately before the document is inserted is stored as the light source light amount I0. Therefore, the measured document transmittance is accurate.
以下、本発明の実施例を図面に基づいて具体的に説明す
る。Embodiments of the present invention will be specifically described below based on the drawings.
第１図は本発明のジアゾ複写機の原稿透過率測定方法に
用いる原稿透過光量検出装置の概略を示す説明図である
。FIG. 1 is an explanatory diagram schematically showing an apparatus for detecting the amount of transmitted light of an original used in the method of measuring the transmittance of an original for a diazo copying machine according to the present invention.
この原稿透過光量検出装置は、複写機の給紙台９０上に
配置され、原稿挿入ギャップＧを介して互いに対向する
よう設けた光源１１および光量センサー１２よりなる光
量検出部ｌＯと、光量検出部ＩＯより原稿挿入方向前方
（図面の右側）に設けた第１の原稿検知手段２０と、光
量検出部１０より原稿挿入方向後方（図面の左側）に設
けた第２の原稿検知手段３０とを育している。This document transmitted light amount detection device is arranged on a paper feed table 90 of a copying machine, and includes a light amount detection section 10 consisting of a light source 11 and a light amount sensor 12, which are arranged to face each other with a document insertion gap G interposed therebetween, and a light amount detection section 10. The first document detection means 20 is provided in front of the IO in the document insertion direction (on the right side of the drawing), and the second document detection means 30 is provided in the rear of the light amount detection section 10 in the document insertion direction (left side in the drawing). are doing.
光源１１は複写機の給紙台９０に埋め込まれるように設
けられ、光量センサー１２、第１の原稿検知手段２０お
よび第２の原稿検知手段３０は対向部材４０に設けられ
ている。The light source 11 is provided so as to be embedded in a paper feed tray 90 of the copying machine, and the light amount sensor 12, the first document detection means 20, and the second document detection means 30 are provided in the opposing member 40.
光量検出部１０は常に動作状態に保持されており、５
ｍ５ｅｃ間隔で光量を検出し、検出した光量値を更新し
ている。The light amount detection unit 10 is always kept in an operating state, and
The light amount is detected at m5ec intervals and the detected light amount value is updated.
本実施例において、原稿透過率の測定は下記のようにし
て行われる。In this embodiment, the measurement of document transmittance is performed as follows.
■ギヤツブＧに原稿Ｐの地の部分（非画像部）を原稿挿
入方向に沿って挿入する。■Insert the base portion (non-image portion) of the document P into the gear G along the document insertion direction.
原稿Ｐの先端が第１の原稿検知手段２０により検知され
たとき（第１図（イ））、光量検出部ｌＯにより検出さ
れた光量は光源光量１．とじて記憶される。When the leading edge of the document P is detected by the first document detection means 20 (FIG. 1(A)), the light amount detected by the light amount detection unit IO is equal to the light source light amount 1. It will be memorized.
■更に原稿挿入方向後方へ原稿Ｐを挿入する。(2) Insert the original P further backward in the original insertion direction.
原稿Ｐの先端が第２の原稿検知手段３０により検知され
たとき（第１図（ロ）、このとき原稿Ｐは光量検出部ｌ
Ｏの光路を完全に覆っている。）、光量検出部ｌＯによ
り検出された光量は透過光量Ｉとして記憶される。When the leading edge of the document P is detected by the second document detection means 30 (FIG. 1(b)), the document P is detected by the light amount detection unit l
It completely covers the optical path of O. ), the light amount detected by the light amount detection unit IO is stored as the transmitted light amount I.
■記憶された光源光量Ｉ０と透過光量Ｉとにより原稿透
過率（Ｉ／Ｉ。）か測定される。(2) The original transmittance (I/I.) is measured based on the stored light source light amount I0 and transmitted light amount I.
そして、測定された原稿透過率に基づいて焼付速度か制
御される。The printing speed is then controlled based on the measured document transmittance.
焼付速度の制御は、感光紙を搬送する駆動源であるモー
タの回転速度を制御することにより行われ、斯かる制御
方法としては、エンコーダによりモータの回転を監視し
て、これを基準に速度を変化させるＰＷＭ（パルス幅変
調）を採用している。The printing speed is controlled by controlling the rotational speed of the motor, which is the drive source for conveying the photosensitive paper. One way to do this is to monitor the rotation of the motor with an encoder and adjust the speed based on this. It uses PWM (Pulse Width Modulation).
本実施例のジアゾ複写機の原稿透過率測定方法によれば
、光源光量Ｉ０を記憶してから透過光量Ｉを記憶するま
での時間は、操作者か装置内に原稿Ｐを挿入する動作に
よる挿入速度によって定まる極めて短い時間であり、原
稿Ｐか挿入される直前の光量か光源光量Ｉ０とじて記憶
されるので、測定された原稿透過率は正確なものとなる
。According to the document transmittance measurement method of the diazo copying machine of this embodiment, the time from storing the light source light amount I0 to storing the transmitted light amount I is determined by the operation of the operator or by inserting the document P into the device. This is an extremely short period of time determined by the speed, and the measured document transmittance is accurate because it is stored as the light intensity just before the document P is inserted or the light source light intensity I0.
本発明のジアゾ複写機の原稿透過率測定方法によれば、
原稿が挿入される直前の光量が光源光量Ｉ０とじて記憶
されるので、正確な原稿透過率が測定され、測定された
原稿透過率に基づいて制御することにより適正な焼付速
度を得ることができる。According to the original transmittance measurement method for a diazo copying machine of the present invention,
Since the light intensity just before the original is inserted is stored as the light source light intensity I0, accurate original transmittance can be measured, and by controlling based on the measured original transmittance, an appropriate printing speed can be obtained. .
第１図は本発明のジアゾ複写機の原稿透過率測定方法に
用いる原稿透過光量検出装置の概略を示す説明図、第２
図は従来のジアゾ複写機の原稿透過率測定方法に用いる
原稿透過光量検出装置の概略を示す説明図である。
ｌＯ・・・光量検出部 １１・・・光源１２・・
・光量センサー ２０・・・第１の原稿検知手段３
０・・・第２の原稿検知手段 ４０・・・対向部材５０
・・・原稿検知手段FIG. 1 is an explanatory diagram showing an outline of a document transmitted light amount detection device used in the document transmittance measuring method for a diazo copying machine according to the present invention, and FIG.
The figure is an explanatory diagram showing an outline of a document transmitted light amount detection device used in a conventional document transmittance measurement method for a diazo copying machine. lO...Light amount detection section 11...Light source 12...
-Light sensor 20...first document detection means 3
0... Second document detection means 40... Opposing member 50
...Original detection means
Claims (1)
源および光量センサーよりなる光量検出部と、 前記光量検出部より原稿挿入方向前方に設けた第１の原
稿検知手段と、 前記光量検出部より原稿挿入方向後方に設けた第２の原
稿検知手段とを有してなる原稿透過光量検出装置を用い
、 前記光量検出部は常に動作状態に保持され、前記第１の
原稿検知手段が原稿を検知したときに検出された光量を
光源光量 I ＿０として記憶し、前記第２の原稿検知手
段が原稿を検知したときに検出された光量を透過光量
I として記憶し、記憶された光源光量 I ＿０と透過光
量 I とにより、挿入された原稿の原稿透過率を測定す
ることを特徴とするジアゾ複写機の原稿透過率測定方法
。[Scope of Claims] A light amount detection section including a light source and a light amount sensor, which are provided to face each other with a document insertion gap interposed therebetween; a first document detection means provided ahead of the light amount detection section in the document insertion direction; A document transmitted light amount detection device includes a second document detection means provided behind the light amount detection section in the document insertion direction, the light amount detection section is always kept in an operating state, and the first document detection means The amount of light detected when the second document detecting means detects the document is stored as the light source light amount I_0, and the amount of light detected when the second document detecting means detects the document is stored as the amount of transmitted light.
A document transmittance measuring method for a diazo copying machine, characterized in that the document transmittance of an inserted document is measured using the stored light source light amount I_0 and the transmitted light amount I stored as I.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24876990A JPH04128737A (en) | 1990-09-20 | 1990-09-20 | Method for measuring transmittance of original of diazo copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24876990A JPH04128737A (en) | 1990-09-20 | 1990-09-20 | Method for measuring transmittance of original of diazo copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04128737A true JPH04128737A (en) | 1992-04-30 |
Family
ID=17183107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24876990A Pending JPH04128737A (en) | 1990-09-20 | 1990-09-20 | Method for measuring transmittance of original of diazo copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04128737A (en) |
-
1990
- 1990-09-20 JP JP24876990A patent/JPH04128737A/en active Pending
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