JPS59208537A - Exposing method - Google Patents
Exposing methodInfo
- Publication number
- JPS59208537A JPS59208537A JP58082253A JP8225383A JPS59208537A JP S59208537 A JPS59208537 A JP S59208537A JP 58082253 A JP58082253 A JP 58082253A JP 8225383 A JP8225383 A JP 8225383A JP S59208537 A JPS59208537 A JP S59208537A
- Authority
- JP
- Japan
- Prior art keywords
- original
- light source
- light
- document
- exposure
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B27/00—Photographic printing apparatus
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/50—Projection printing apparatus, e.g. enlarger, copying camera with slit or like diaphragm moving over original for progressive exposure
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Facsimile Scanning Arrangements (AREA)
- Projection-Type Copiers In General (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は原稿の両面又は片面を選択的に感光体に露光す
るカメラ、複写機、ファクシミリ装置等に用いる露光方
法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exposure method used in cameras, copying machines, facsimile machines, etc., which selectively exposes both sides or one side of a document to a photoreceptor.
シート状原稿の両面を記録することができる複写機等の
記録装置の露光装置においては、原稿表面用照明光源と
原稿裏面用照明光源が原稿の両側で相対して配置されて
おシ、両面露光時及び片面露光時にかかわらず、両方の
光源を点灯して原稿の両面をほぼ同一の明るさで照明し
ていた。このため片面露光時には、原稿の光透過率が高
い場合は原稿からの透光光が感光体に投射されるので記
録画像のコントラストが低下し、また原稿の光透過率が
高く、両面に画像がある場合は表面と裏面の両方の画像
が重なり合って感光体に記録されてしまう不都合があっ
た。In an exposure device of a recording device such as a copying machine that can record both sides of a sheet-like original, an illumination light source for the front side of the original and an illumination light source for the back side of the original are placed opposite each other on both sides of the original, and double-sided exposure is possible. Both light sources were turned on and both sides of the document were illuminated with almost the same brightness regardless of the time or single-sided exposure. Therefore, during single-sided exposure, if the light transmittance of the document is high, the transmitted light from the document will be projected onto the photoreceptor, reducing the contrast of the recorded image. In some cases, there is a problem in that images on both the front and back sides are recorded on the photoreceptor in an overlapping manner.
本発明は上記不都合を解消せんとするもので、片面露光
時には原稿の透過光量に応じて非露光面を照明する光源
を制御することによりコントラストの低下、記録画像の
重なシを防止した露光方法を提供するものであシ、原稿
の種類にかかわらず、常に適切な記録像を得ることがで
きる。The present invention aims to solve the above-mentioned disadvantages, and is an exposure method that prevents a decrease in contrast and overlapping of recorded images by controlling a light source that illuminates the non-exposed surface according to the amount of transmitted light of the original during single-sided exposure. Therefore, regardless of the type of document, an appropriate recorded image can always be obtained.
以下、図面を参照して本発明を説明する。The present invention will be described below with reference to the drawings.
第1図は本発明を適用した輪転式カメラの原稿搬送部及
び照明部の概略図を示すものであシ、第2図は上記カメ
ラの光学部の概略図である。FIG. 1 is a schematic diagram of a document conveying section and an illumination section of a rotary camera to which the present invention is applied, and FIG. 2 is a schematic diagram of an optical section of the camera.
第1図において原稿Pは給紙o−yi、1’ によハ
カメラ内に供給されたのち、照明部に配置された受光素
子4により検知され、受光素子4が原稿を検知したとき
原稿の画像をフィルム下に露光開始する。照明部に入っ
た原稿Pは、原稿表面用照明光源5及び原稿裏面用照明
光源5′により表裏両面が照明される。照明された両面
の画像は原稿に対し45°の角度でそれぞれ配置された
反射鏡10及び10′、スリット11及び11′を介し
ミラー12を経てレンズ13によシフィルムFに投影露
光される。第1図、第2図において原稿Pが給紙ローラ
1,1′によシ供給され、その先端が受光素子4により
検知されるとフィルムFは長手方向に移動を開始すると
共にシャッター16が開く。原稿Pがガラス板3,3′
の間を移動するとフィルムFが原稿と同期して移動し原
稿像がフィルムFに露光され石。更に原稿Pが移動しそ
の後端が受光素子を外れると、タイマ(図示せず)が作
動し、原稿Pの後端がガラス板3,3′ を外れた時に
タイマから出力する信号によシフィルムFが停止しかつ
シャッタ16が閉じられ撮影が完了する。この時原稿P
の移動速度とフィルムFの移動速度は光路長とレンズに
より定まる縮平によシ予め定められる。6は原稿を照明
するランプ、7は原稿の透過光量を測定する受光素子で
ある。In FIG. 1, a document P is fed into the camera through paper feeds o-yi, 1', and then detected by a light-receiving element 4 arranged in the illumination section. When the light-receiving element 4 detects the document, an image of the document is generated. Start exposing the film below. The document P that has entered the illumination section is illuminated on both the front and back sides by the document front side illumination light source 5 and the document back side illumination light source 5'. The illuminated images on both sides are projected onto a film F by a lens 13 via reflecting mirrors 10 and 10' and slits 11 and 11', which are arranged at an angle of 45 degrees with respect to the original, and a mirror 12. In FIGS. 1 and 2, a document P is fed by the paper feed rollers 1 and 1', and when the leading edge of the document P is detected by the light receiving element 4, the film F starts to move in the longitudinal direction and the shutter 16 opens. . Original P is on glass plate 3, 3'
When the film F is moved between the two, the film F moves in synchronization with the original, and the original image is exposed to the film F. When the document P moves further and its trailing edge comes off the light-receiving element, a timer (not shown) is activated, and the signal output from the timer when the trailing edge of the document P comes off the glass plates 3, 3' causes the film to be moved. F is stopped, the shutter 16 is closed, and the photographing is completed. At this time, the manuscript P
The moving speed of the film F and the moving speed of the film F are determined in advance by reduction determined by the optical path length and the lens. 6 is a lamp that illuminates the original, and 7 is a light receiving element that measures the amount of light transmitted through the original.
原稿の両面の画像をフィルムに露光する場合は、光源5
,5I がそれぞれ露光に必要とする明2・さて点灯し
、原稿の両面を照明する。実施例では両面をほぼ同一の
明るさで照明しているが、それぞれ個別の明るさで照明
してもよい。原稿の片面(表面)のみを露光する場合は
、片面モードに切換えられ、これにより光源5が露光に
必要な明るさで原稿の表面を照明し、光源5′が原稿の
透過光量に応じた明るさで点灯し、原稿の表面を照明す
る。すなわち光源5′は受光素子7の出力に応じて制御
され、原稿の透過光量が大きいときは光源5′の発光量
を少くシ、透過光量が小さいときは光源5′の発光量を
大きくするように制御する。When exposing images on both sides of the original onto film, use light source 5.
, 5I, respectively, are turned on to illuminate both sides of the document. In the embodiment, both sides are illuminated with substantially the same brightness, but each side may be illuminated with individual brightness. When exposing only one side (front side) of the original, the mode is switched to single-sided mode, whereby the light source 5 illuminates the front side of the original with the brightness necessary for exposure, and the light source 5' illuminates the front side of the original with the brightness necessary for exposure. The light will turn on and illuminate the front surface of the document. That is, the light source 5' is controlled according to the output of the light receiving element 7, and when the amount of transmitted light from the document is large, the amount of light emitted from the light source 5' is decreased, and when the amount of transmitted light is small, the amount of light emitted from the light source 5' is increased. control.
表面のみを露光する場合、原稿の裏面をフィルムに投影
する光路はシャッタによシ閉じられている。When only the front side is exposed, the optical path for projecting the back side of the document onto the film is closed by a shutter.
なお、原稿の片面のみを露光する場合、公知のカメラ部
のユニット交換によりフィルムFを第2図と異なる位置
にセットし、原稿の片面の像な、フィルムが実線位置に
セットされている場合よりも倍の大きさで露光させるよ
うにすることもできる。In addition, when exposing only one side of the original, set the film F in a position different from that shown in Fig. 2 by replacing the unit of the camera unit as known in the art. It is also possible to make the exposure twice as large.
第6図は照明光源制御回路を示し、同図において、30
は電源、31.31’は光源5,51の発光量を制御す
る電圧制御回路、32は露光モード切換スイッチ、33
,34はそ−ド表示ランプである。7は原稿の透過光量
測定用受光素子である。FIG. 6 shows an illumination light source control circuit, in which 30
31.31' is a voltage control circuit that controls the amount of light emitted by the light sources 5 and 51; 32 is an exposure mode changeover switch; 33
, 34 are display lamps. 7 is a light receiving element for measuring the amount of transmitted light of the original.
前述した原稿表面用照明光源5は直列に接続された複数
のランプからなυ、また前述した原稿裏面用照明光源5
′は直列に接続された複数のランプからなり、両面露光
モードの場合、各ランプは原稿が照明部に送られたとき
電圧制御回路31により所定の輝度で点灯される。露光
モード切換スイッチ32は手動スイッチからなシ、切換
スイッチ36と連動しておυ、aに接続すると両面露光
モードに設定され、これに連動して照明光源5′が電圧
制御回路31に接続され、またランプ33が点灯して両
面露光モードを表示する。一方、スイッチ32をbに接
続すると片面露光モードに設定され、これに連動して照
明光源5′が電圧制御回路31′に接続され、また2ン
プ34が点灯して片面露光モードを表示する。The illumination light source 5 for the front side of the document described above is composed of a plurality of lamps connected in series, and the illumination light source 5 for the back side of the document described above is composed of a plurality of lamps connected in series.
' consists of a plurality of lamps connected in series, and in the double-sided exposure mode, each lamp is turned on at a predetermined brightness by the voltage control circuit 31 when the document is sent to the illumination section. The exposure mode changeover switch 32 is not a manual switch, and when connected to the changeover switch 36 and υ, a, the double-sided exposure mode is set, and in conjunction with this, the illumination light source 5' is connected to the voltage control circuit 31. , and the lamp 33 lights up to display the double-sided exposure mode. On the other hand, when the switch 32 is connected to b, the single-sided exposure mode is set, and in conjunction with this, the illumination light source 5' is connected to the voltage control circuit 31', and the 2 lamp 34 is turned on to indicate the single-sided exposure mode.
したがって、スイッチ32により両面露光モードを選択
すると両方の光源5.5′ が同一の電圧制御回路61
に制御されて点灯し、表裏両面を同一の明るさで照明し
、片面モードを選択すると照明光源5′は電圧制御回路
31′にょシ制御され、原稿の透過濃度に応じて点灯す
る。電圧制御回路31 ’は、受光素子7により検知し
た原稿の透過光量が大きい場合はランプ5′の発光量を
少くして裏面の画像が表面の画像と重なってフィルム上
に露光されないようにすると共に透過光にょシ表面の画
像のコントラストが高くなるようにランプ5′を点灯し
、原稿の透過光量が少ない場合はランプ5′の発光量を
大きくして裏面の画像がフィルムに露光されないように
すると共に透過光にょシ表面の画像のプントラス)が高
くなるようにランプ5′を点灯し、いずれの場合も裏面
の画像がフィルムに露光されない状態で裏面を照明して
表面の画像が高いコントラストでフィルムに総光される
ようにランプ5′の発光量を制御している。照明光量を
制御する方法は実施例に限られるものでは絞
なく、ランプの前に紋りを設けて制御しておυ、点灯す
るランプの数を制御したりしてもよい。Therefore, when the double-sided exposure mode is selected by the switch 32, both light sources 5.5' are connected to the same voltage control circuit 61.
When the single-sided mode is selected, the illumination light source 5' is controlled by the voltage control circuit 31' and is turned on according to the transmission density of the document. The voltage control circuit 31' reduces the amount of light emitted from the lamp 5' when the amount of transmitted light from the document detected by the light receiving element 7 is large, so that the image on the back side does not overlap with the image on the front side and is exposed on the film. Light the lamp 5' to increase the contrast of the image on the front side of the transmitted light, and if the amount of transmitted light from the original is low, increase the amount of light emitted by the lamp 5' to prevent the image on the back side from being exposed to the film. At the same time, the lamp 5' is turned on so that the transmitted light (the image on the front surface) is high. The amount of light emitted from the lamp 5' is controlled so that the total amount of light is emitted. The method for controlling the amount of illumination light is not limited to the embodiment, and may be controlled by providing a rim in front of the lamp, or the number of lamps to be lit may be controlled.
上記実施例ではスリット露光方式で記録を行っているが
、原稿と感光体を静止させて、いわゆる全面同時露光方
式で記録を行ってもよい。In the embodiment described above, recording is performed using a slit exposure method, but the document and the photoreceptor may be kept stationary and recording may be performed using a so-called full-surface simultaneous exposure method.
また感光体として種々の公知のものを使用することがで
き、たとえばCOD:)インセンサなどの光電変換素子
を用いてもよい。ラインセンサを用いることによシファ
クシミリに適用することができる。Furthermore, various known photoreceptors can be used, and for example, a photoelectric conversion element such as a COD:) insensor may be used. It can be applied to fax machines by using a line sensor.
以上のように本発明によれば、片面露光時に原稿の両面
の画像が重なυ合って記録されることがすく、コントラ
ストの高い画像を記録することができる。As described above, according to the present invention, images on both sides of a document are less likely to be recorded in an overlapping manner during single-sided exposure, and images with high contrast can be recorded.
第1図は本発明の1実施例を示す輪転式カメラの要部構
成図、第2図は上記カメラの斜視図、第3図は光源制御
回路を示す図である。
5・5′・−・照明光源、10・10’・12・0ミラ
ー、Po−原稿、6・・・光量ランプ、7・・・受光素
子。
出願人 中ヤノン株式会社FIG. 1 is a block diagram of the main parts of a rotary camera showing one embodiment of the present invention, FIG. 2 is a perspective view of the camera, and FIG. 3 is a diagram showing a light source control circuit. 5, 5' -- illumination light source, 10, 10', 12, 0 mirror, Po-original, 6... light intensity lamp, 7... light receiving element. Applicant Nakayanon Co., Ltd.
Claims (1)
において、原稿の透過光量を測定する手段を設け、原稿
の両面を露光する場合は原稿の両面を露光に必要な明る
さで照明してそれぞれ感光体に投影し、片面を露光する
場合は原稿の露光すべき面を露光に必要な明るさで照明
し、露光しない面を前記測定手段の出力に応じて制御さ
れた明るさで照明して露光すべき面のみを感光体に投影
することを特徴とする露光方法。Device θ that selectively exposes both sides or one side of a document to a photoreceptor
In this method, a means for measuring the amount of light transmitted through the original is provided, and when both sides of the original are to be exposed, both sides of the original are illuminated with the brightness necessary for exposure and each is projected onto a photoreceptor, and when one side is to be exposed, the amount of light transmitted through the original is The method is characterized in that the surface to be exposed is illuminated with a brightness necessary for exposure, the surface not to be exposed is illuminated with a brightness controlled according to the output of the measuring means, and only the surface to be exposed is projected onto the photoreceptor. exposure method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58082253A JPS59208537A (en) | 1983-05-11 | 1983-05-11 | Exposing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58082253A JPS59208537A (en) | 1983-05-11 | 1983-05-11 | Exposing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59208537A true JPS59208537A (en) | 1984-11-26 |
JPH0436371B2 JPH0436371B2 (en) | 1992-06-16 |
Family
ID=13769272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58082253A Granted JPS59208537A (en) | 1983-05-11 | 1983-05-11 | Exposing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59208537A (en) |
-
1983
- 1983-05-11 JP JP58082253A patent/JPS59208537A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0436371B2 (en) | 1992-06-16 |
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