JPS5826028B2 - Fukushiyaki Touno Shyoumeisouchi - Google Patents
Fukushiyaki Touno ShyoumeisouchiInfo
- Publication number
- JPS5826028B2 JPS5826028B2 JP49137534A JP13753474A JPS5826028B2 JP S5826028 B2 JPS5826028 B2 JP S5826028B2 JP 49137534 A JP49137534 A JP 49137534A JP 13753474 A JP13753474 A JP 13753474A JP S5826028 B2 JPS5826028 B2 JP S5826028B2
- Authority
- JP
- Japan
- Prior art keywords
- illumination device
- light
- scale
- illumination
- amount
- 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.)
- Expired
Links
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- Light Sources And Details Of Projection-Printing Devices (AREA)
- Control Or Security For Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は複写機等に用いられる照明装置に関するもので
、特に照明装置の走行速度を可変させることによって感
光面に達する露光量の均一化を企ったものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an illumination device used in a copying machine, etc., and is particularly intended to equalize the amount of exposure that reaches a photosensitive surface by varying the running speed of the illumination device.
従来の複写機等で用いられるスリット像投映系では、レ
ンズ系及び照明装置を一体的に移動させる方法が多く用
いられている。In slit image projection systems used in conventional copying machines and the like, a method in which a lens system and an illumination device are moved integrally is often used.
この方法ではカラー複写機の様に何回かの作像を繰返し
行う場合、完全に前回の像に今回の像を重ね合わせるこ
とが難しく、高解像度の作像が得にくい。In this method, when image formation is repeated several times as in a color copying machine, it is difficult to completely superimpose the current image on the previous image, making it difficult to obtain a high-resolution image.
従ってカラー複写の様な場合では、原稿、レンズ、感光
紙を作像中移動させることなく露光を行うのが望ましい
訳である。Therefore, in cases such as color copying, it is desirable to perform exposure without moving the original, lens, and photosensitive paper during image formation.
一方、原稿、レンズ、感光紙を移動するべとなく露光を
行う方法として、原稿への照明は全面同時に行うものが
ある。On the other hand, as a method for performing exposure without moving the document, lens, and photosensitive paper, there is a method in which the entire surface of the document is illuminated simultaneously.
しかしこの場合、全面を同時に均一になるように照明す
ることは非常に困難で、また照明部を原稿台よりも遠ざ
ける必要があるため照明効率が悪くなり照明部での消費
電力が大きくなる。However, in this case, it is very difficult to uniformly illuminate the entire surface at the same time, and the illumination section must be placed farther away than the document table, resulting in poor illumination efficiency and increased power consumption in the illumination section.
それに第１図に示す如く原稿りの明るさが照明部Ａから
の光により均一に照明されている場合、レンズＢを介し
て感光紙Ｃ面に露光されると、感光面の周辺と中心部で
は原稿面までの距離が異なるため、中心部が明るく、周
辺部では暗くなる。In addition, when the original document is uniformly illuminated by the light from the illumination section A as shown in Figure 1, when the surface of the photosensitive paper C is exposed through the lens B, the periphery and center of the photosensitive surface will be exposed. Since the distance to the document surface is different, the center is bright and the periphery is dark.
従って感光紙Ｃ面で均一な露光量を得るには、原稿を照
明する光の強さを変化させるか、或は露光時間を変化さ
せることが必要となってくる。Therefore, in order to obtain a uniform exposure amount on the surface of the photosensitive paper C, it is necessary to change the intensity of the light illuminating the original or to change the exposure time.
本発明は、後者の露光時間を制御することによって感光
面に達する光量を一定にする照明装置を提供せんとする
もので、次に実施例を挙げて詳細に説明する。The present invention aims to provide an illumination device in which the amount of light reaching the photosensitive surface is made constant by controlling the latter exposure time, and will be described in detail below with reference to embodiments.
第２図に於て、１は原稿等の被写体を載せるガラス等の
透明板で、該透明板１面を照明装置４が走行する。In FIG. 2, reference numeral 1 denotes a transparent plate made of glass or the like on which an object such as a document is placed, and an illumination device 4 runs on the surface of the transparent plate.
照明装置４は内部に透明板の巾方向に均一光を発するラ
ンプ６が収納され、透明板１に対向したスリット５から
透明板１を照明している。The illumination device 4 houses a lamp 6 that emits uniform light in the width direction of the transparent plate, and illuminates the transparent plate 1 through a slit 5 facing the transparent plate 1.
照明装置４は後述する制御手段によって回転が制御され
たモータ（図示せず）によって稼動される。The lighting device 4 is operated by a motor (not shown) whose rotation is controlled by a control means to be described later.
透明板１の原稿から反射された光を感光面２上に結像さ
せるためレンズ等の光学系３が設置されている。An optical system 3 such as a lens is installed to form an image of light reflected from the original on the transparent plate 1 onto the photosensitive surface 2.
透明体１の照明装置４が走行する方向の略全長に亘って
第３図に示す目盛板７が取付けられている。A scale plate 7 shown in FIG. 3 is attached over substantially the entire length of the transparent body 1 in the direction in which the illumination device 4 travels.
該目盛板７は原稿複写に妨げとならない位置に設置され
て、一定の間隔で目盛が印されている。The scale plate 7 is installed at a position that does not interfere with original copying, and has scales marked at regular intervals.
上記目盛板７と対向する位置に、上記照明装置４と一体
的に走行する目盛読取装置１２が設けられている。A scale reading device 12 that runs integrally with the illumination device 4 is provided at a position facing the scale plate 7 .
該目盛読取装置１２は、光源８、レンズ９，１０及び受
光素子１１から成り、光源８の光を目盛板７上に集束し
て照明し、その反射光を受光素子１１に入射する。The scale reading device 12 consists of a light source 8, lenses 9 and 10, and a light receiving element 11. The light from the light source 8 is focused on the scale plate 7 to illuminate it, and the reflected light is incident on the light receiving element 11.
目盛板γ上には目盛が黒線等によって印されているため
目盛の存否によって受光素子１１の入射光量が異なり、
目盛の検出を行うことができ、読取装置１２と一体的に
移動している照明装置４の相対的な位置検義を行うこと
ができる。Since the scale is marked with a black line or the like on the scale plate γ, the amount of light incident on the light receiving element 11 varies depending on the presence or absence of the scale.
The scale can be detected, and the relative position of the illumination device 4, which is moving integrally with the reading device 12, can be checked.
照明装置の位置検出方法としては、上記実施例に限られ
ることなく他の方法でも実施できる。The method for detecting the position of the lighting device is not limited to the above embodiments, and other methods may be used.
第４図は上記読取装置１２からの信号に基いて照明装置
４の走行速度を制御する制御手段のブロック図である。FIG. 4 is a block diagram of a control means for controlling the running speed of the illumination device 4 based on the signal from the reading device 12.
図に於て読取装置１２から得られた信号は、ＡＤ変換器
１３により、黒線目盛の存否に基づく所定レベルをもっ
たディジタル信号に変換した後、目盛を検出することに
よって得られるディジタル信号をカウンター１４で計数
し、照明装置４の移動に伴って何本の目盛を通過したか
を検知する。In the figure, the signal obtained from the reading device 12 is converted by the AD converter 13 into a digital signal having a predetermined level based on the presence or absence of the black line scale, and then converted into a digital signal obtained by detecting the scale. The counter 14 counts and detects how many scales the lighting device 4 has passed as it moves.
一方記憶装置１５に与め目盛計数値とモータの回転数と
の間に次のような関係を記憶させておく。On the other hand, the following relationship between the scale count value and the rotational speed of the motor is stored in the storage device 15.
則ち、感光面２に達する光量は、原稿面との間に光学系
２を介在させているため感光面の中央部と周辺部で相違
する。That is, the amount of light that reaches the photosensitive surface 2 differs between the center and the periphery of the photosensitive surface because the optical system 2 is interposed between the photosensitive surface and the document surface.
従って中央部に達する光量と周辺部に達する光量をほぼ
均一になるように、照明装置４の走行距離と走行速度と
の関係を予め求めて上記記憶装置１５に収納する。Therefore, the relationship between the travel distance and travel speed of the illumination device 4 is determined in advance and stored in the storage device 15 so that the amount of light reaching the central portion and the amount of light reaching the peripheral portion are approximately equal.
例えば反射光路が長くなる部分で、短かくなる部分より
も遅く走行されるようにする。For example, the part where the reflected light path is long is made to travel slower than the part where it is short.
照合装置１６ではカウンター１４から入力された計数値
と上記記憶装置１５の記憶内容との照合を行ない、計数
値−照明装置４の走行距離−に対応したモータ制御指令
信号を発する。The verification device 16 verifies the counted value inputted from the counter 14 and the contents stored in the storage device 15, and issues a motor control command signal corresponding to the counted value - the distance traveled by the illumination device 4.
モータ制御指令信号はモータ駆動回路１７を介して対応
する適切な駆動電圧をもった信号に変換されてモータ１
８に供給される。The motor control command signal is converted into a signal with a corresponding appropriate drive voltage via the motor drive circuit 17, and the motor 1 is
8.
尚、モータ１８は供給電圧と回転速度との間に比例関係
を有する特性をもつものを利用する。Note that the motor 18 used has a characteristic that there is a proportional relationship between the supplied voltage and the rotational speed.
モータ１８は供給された電圧値に応じた回転を行ない、
照明装置４に伝達されて稼動させる。The motor 18 rotates according to the supplied voltage value,
The light is transmitted to the lighting device 4 and operated.
その結果照明装置４ば、周辺部即ち走行方向の両端部で
比較的遅い速度で稼動し、中央部で速い速度で移動する
ことになり、透明板上の原稿面から反射されて感光面３
に達する光量は、光学系の介在にも拘らず感光面全域で
ほぼ均一になる。As a result, the illumination device 4 operates at a relatively slow speed at the periphery, that is, at both ends in the running direction, and moves at a high speed at the center.
The amount of light that reaches 100 nm is approximately uniform over the entire photosensitive surface despite the intervention of the optical system.
以上本発明のように照明装置が原稿面を走行する複写機
等に於て、照明装置の走行距離を検知してその走行速度
を可変制御することにより、光学系の特性を補って感光
面に達する光量をほぼ全域に亘って均一にすることがで
き、一様な複写を得ることができる。As described above, in a copying machine or the like in which an illumination device travels on the document surface as in the present invention, by detecting the travel distance of the illumination device and variably controlling its travel speed, the characteristics of the optical system can be compensated for and the illumination device can be applied to the photosensitive surface. The amount of light that reaches the area can be made uniform over almost the entire area, and uniform copies can be obtained.
特にカラー複写機のように複数回の走行を行う場合に色
ずれ等を起こす惧れがなく鮮明な作像を得る。To obtain a clear image without the risk of color shift etc., especially when running a plurality of times as in a color copying machine.
第１図は従来装置の概略図、第２図は本発明による実施
例の照明部の概略図、第３図は同実施例の読取装置部の
概略図、第４図は同実施例の駆動源制御部のブロック図
である。
３・・・・・・感光面、４・・・・・・照明装置、７・
・・・・・目盛板、１２・・・・・・目盛読取装置、１
４・・・・・・カウンター１５・・・・・・記憶装置、
１６・・・・・・照合装置、１８・・・・・・モータ。FIG. 1 is a schematic diagram of the conventional device, FIG. 2 is a schematic diagram of the illumination section of the embodiment according to the present invention, FIG. 3 is a schematic diagram of the reading device section of the embodiment, and FIG. 4 is the drive of the embodiment. FIG. 2 is a block diagram of a source control unit. 3...Photosensitive surface, 4...Lighting device, 7.
...Scale plate, 12...Scale reading device, 1
4...Counter 15...Storage device,
16... Verification device, 18... Motor.
Claims (1)
せる駆動源と、上記照明装置の走行距離を検出する位置
検出手段と、該位置検出手段の位置検出信号と照合して
上記駆動源の動作を可変制御する制御部とを備え、上記
照明装置を原稿面の周辺で遅く走行し、中央部で速く走
行することによって感光面に達する光量をほぼ均一にし
たことを特徴とする複写機等の照明装置。1. An illumination device that illuminates the document surface, a drive source that drives the illumination device, a position detection device that detects the travel distance of the illumination device, and a position detection signal from the position detection device to determine the position of the drive source. A copying machine, etc., characterized in that the illumination device is provided with a control unit that variably controls the operation, and the illumination device is moved slowly around the document surface and faster in the center, thereby making the amount of light reaching the photosensitive surface almost uniform. lighting equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49137534A JPS5826028B2 (en) | 1974-11-27 | 1974-11-27 | Fukushiyaki Touno Shyoumeisouchi |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49137534A JPS5826028B2 (en) | 1974-11-27 | 1974-11-27 | Fukushiyaki Touno Shyoumeisouchi |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5162048A JPS5162048A (en) | 1976-05-29 |
| JPS5826028B2 true JPS5826028B2 (en) | 1983-05-31 |
Family
ID=15200919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP49137534A Expired JPS5826028B2 (en) | 1974-11-27 | 1974-11-27 | Fukushiyaki Touno Shyoumeisouchi |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5826028B2 (en) |
-
1974
- 1974-11-27 JP JP49137534A patent/JPS5826028B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5162048A (en) | 1976-05-29 |
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