JPH06175240A - Turning-on control method for light source for illuminating original in copying machine - Google Patents

Turning-on control method for light source for illuminating original in copying machine

Info

Publication number
JPH06175240A
JPH06175240A JP34512992A JP34512992A JPH06175240A JP H06175240 A JPH06175240 A JP H06175240A JP 34512992 A JP34512992 A JP 34512992A JP 34512992 A JP34512992 A JP 34512992A JP H06175240 A JPH06175240 A JP H06175240A
Authority
JP
Japan
Prior art keywords
time
exposure
light source
halogen lamp
turned
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
Application number
JP34512992A
Other languages
Japanese (ja)
Other versions
JP2916563B2 (en
Inventor
Hideyuki Murakoshi
秀行 村越
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP34512992A priority Critical patent/JP2916563B2/en
Publication of JPH06175240A publication Critical patent/JPH06175240A/en
Application granted granted Critical
Publication of JP2916563B2 publication Critical patent/JP2916563B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Of Exposure In Printing And Copying (AREA)

Abstract

PURPOSE:To realize exposure after the temperature of the tube wall of a halogen lamp is set within a proper range by preliminarily turning on a light source at an exposure time, controlling the preliminary turning-on time according to the change of the exposure time and fixing the total turning-on time of the light source every time that a unit image is formed. CONSTITUTION:In the case that the forming magnification of the image is 100%, for example, the halogen lamp is preliminarily turned on (PL) when a scanner is moved to a waiting position W. Then, the halogen lamp is turned off (LO) in order to prevent one point from being concentratedly irradiated at the waiting time until the exposure is started. When a lens part and a movable mirror part arrive at a prescribed position according to an image forming condition and an exposure start feasible state is attained, the halogen lamp is turned on for the exposure (ML). Besides, even after the scanner is moved to a home position HP from the waiting position W and the exposure is finished, the halogen lamp is turned on and held (AL) at the home position HP in a prescribed time and the temperature of the tube wall is maintained. The total turning-on time of the halogen lamp is set by considering a halogen cycle.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、複写機を構成する光
源を適当温度に維持して露光する原稿照明用光源の点灯
制御方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the lighting of a light source for illuminating an original, which exposes a light source constituting a copying machine at an appropriate temperature.

【0002】[0002]

【従来の技術】感光材料を用いる複写機による画像形成
では、光反射型原稿及び光透過型原稿を光源により照射
して感光材料を露光することが行われる。すなわち光反
射型原稿を露光するときは、原稿を下方から照射し、得
られた反射光を所定位置に配置された各ミラーで反射さ
せて露光部まで導き感光材料を露光する。また光透過型
原稿を露光するときは、原稿を上方から照射し、原稿を
透過した透過光を所定位置に配置された各ミラーで反射
させて露光部まで導き感光材料を露光する。
2. Description of the Related Art In image formation by a copying machine using a light-sensitive material, a light-reflective original and a light-transmissive original are irradiated by a light source to expose the light-sensitive material. That is, when exposing a light-reflective document, the document is irradiated from below, and the reflected light obtained is reflected by each mirror arranged at a predetermined position and guided to the exposure section to expose the photosensitive material. Further, when exposing a light-transmitting type original, the original is irradiated from above, and the transmitted light that has passed through the original is reflected by each mirror arranged at a predetermined position and is guided to the exposure section to expose the photosensitive material.

【0003】光源には輝度が高く、また短波長に富むハ
ロゲンランプが好ましく、露光毎にハロゲンランプを点
灯させて原稿を照射することにより露光が成される。ハ
ロゲンランプは、通電によりフィラメントを構成するタ
ングステンが蒸発し、その後管内壁に蒸着したタングス
テン分子が分解し、再びフィラメントに戻されるという
ハロゲンサイクルを有している。
The light source is preferably a halogen lamp having high brightness and abundant short wavelength, and the exposure is performed by illuminating the original with lighting the halogen lamp for each exposure. The halogen lamp has a halogen cycle in which tungsten constituting the filament is evaporated by energization, and then the tungsten molecules deposited on the inner wall of the tube are decomposed and returned to the filament again.

【0004】ハロゲンランプの点灯は、該ハロゲンサイ
クルを考慮して管壁温度が約250度乃至550度とな
る時期に行われるようにしないと、管内壁にタングステ
ンが付着したままの所謂黒化状態となりハロゲンランプ
の寿命を著しく低下させる。ところが各工程から成る画
像形成では、一回の画像形成(単位画像形成)所要時間
が長いことがあり、従って特に連続画像形成を行う場
合、この間に管壁温度が低下してしまい上記適当温度範
囲でハロゲンランプを点灯させて画像形成を続行するこ
とが困難となる。
If the halogen lamp is not turned on at the time when the temperature of the tube wall is about 250 to 550 degrees in consideration of the halogen cycle, the so-called blackened state in which the tungsten is still attached to the inner wall of the tube. Will significantly reduce the life of the halogen lamp. However, in the image formation consisting of each process, the time required for one image formation (unit image formation) may be long, and therefore, particularly when continuous image formation is performed, the tube wall temperature decreases during this period, and the above appropriate temperature range is exceeded. Therefore, it becomes difficult to turn on the halogen lamp and continue the image formation.

【0005】[0005]

【発明が解決しようとする課題】そこでこの発明は上記
事情に鑑みて成されたもので、ハロゲンランプの管壁を
適当温度範囲にしてから露光することができる原稿照明
用光源の点灯制御方法を提供することを目的とする。
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a method for controlling the lighting of a light source for illuminating a document, which is capable of exposing a halogen lamp tube wall in an appropriate temperature range before exposure. The purpose is to provide.

【0006】[0006]

【課題を解決するための手段】この発明に係わる原稿照
明用光源の点灯制御方法は、複写機における露光時に光
源を予備点灯させて該光源が適当温度範囲に成されてか
ら露光点灯させるとともに、画像形成条件により露光時
間が変化しても、該変化に対応させて前記予備点灯され
る時間を制御して単位画像形成毎の光源の総点灯時間を
一定にするようにしたものである。
A method for controlling lighting of a light source for illuminating a document according to the present invention is such that a light source is preliminarily turned on at the time of exposure in a copying machine and the light source is turned on after exposure to an appropriate temperature range. Even if the exposure time changes depending on the image forming conditions, the total lighting time of the light source for each unit image formation is made constant by controlling the preliminary lighting time corresponding to the change.

【0007】[0007]

【作用】前記手段によれば、露光時を予備点灯させ、光
源が適当温度範囲になった状態で露光点灯させること
で、特に連続画像形成において、光源温度が下がり過ぎ
る前に次の画像形成が行われる。また設定される画像形
成条件により露光時間が変化したときでも、この変化に
対応して予備点灯時間を制御し、露光時間変化に拘わら
ず単位画像形成毎の光源の総点灯時間が一定になるよう
に制御される。
According to the above-mentioned means, by pre-lighting at the time of exposure and exposing and lighting in a state where the light source is in an appropriate temperature range, particularly in continuous image formation, the next image formation can be performed before the light source temperature becomes too low. Done. Even if the exposure time changes due to the set image forming conditions, the preliminary lighting time is controlled according to this change so that the total lighting time of the light source for each unit image formation becomes constant regardless of the change of the exposure time. Controlled by.

【0008】画像形成条件による露光時間の変化として
は、拡大画像形成のときは露光時間が長くなるので、こ
れに応じて予備点灯時間を短縮し、縮小画像形成のとき
は露光時間が短くなるので、これに応じて予備点灯時間
を延長する。これにより単位画像形成毎の光源の総点灯
時間が一定となり、適当な管壁温度で光源の点灯が行わ
れるため、黒化状態を防ぎ、光源の寿命低下を回避する
ことができる。
Regarding the change of the exposure time depending on the image forming conditions, the exposure time becomes longer when the enlarged image is formed, and accordingly, the preliminary lighting time is shortened, and the exposure time becomes shorter when the reduced image is formed. , The preliminary lighting time is extended accordingly. As a result, the total turn-on time of the light source for each unit image formation becomes constant, and the light source is turned on at an appropriate tube wall temperature. Therefore, it is possible to prevent a blackened state and avoid a reduction in the life of the light source.

【0009】この発明が適用される複写機における画像
形成用材料の処理方式は特に限定されず、湿式処理、乾
式処理の何れでも良い。画像形成用材料としては、例え
ば熱現像感光材料が挙げられる。該熱現像感光材料につ
いては、米国特許第4,500,626号、同第4,4
83,914号、同第4,430,415号、同第4,
503,137号明細書、特開昭59−154445
号、同59−180548号、同59−165054
号、同61−88256号、同60−120356号、
同59−218443号、及び同61−238056号
公報等に開示されている。
The processing method of the image forming material in the copying machine to which the present invention is applied is not particularly limited, and either wet processing or dry processing may be used. Examples of the image forming material include a photothermographic material. Regarding the photothermographic material, U.S. Pat. Nos. 4,500,626 and 4,4
83,914, 4,430,415, and 4,
503,137, JP-A-59-154445.
No. 59-180548 and 59-165054.
No. 61-88256, No. 60-120356,
No. 59-218443, No. 61-238056, and the like.

【0010】上記熱現像感光材料は、基本的には支持体
上に感光性ハロゲン化銀、バインダ、色素供与性化合
物、及び還元剤(色素供与性物質が還元剤を兼ねる場合
もある)を有するものであり、さらに必要に応じて有機
銀塩その他の添加剤を含有させることができる。上記熱
現像感光材料は露光に対しネガの画像を与えるもので
も、ポジの画像を与えるものでも良い。ポジの画像を与
える方式にはハロゲン化銀乳剤として直接ポジ乳剤(造
核剤を用いる方式、光かぶらせ方式の2種がある)を用
いる方式、及びポジ状に拡散性の色素像を放出する色素
供与性化合物を用いる方式の何れもが採用できる。
The above photothermographic material basically has a photosensitive silver halide, a binder, a dye-donor compound, and a reducing agent (the dye-donor substance may also serve as the reducing agent) on a support. In addition, an organic silver salt and other additives can be added if necessary. The heat-developable photosensitive material may give a negative image or a positive image upon exposure. As a method of giving a positive image, a method of directly using a positive emulsion (a method using a nucleating agent and a light fog method) is used as a silver halide emulsion, and a positive diffusible dye image is emitted. Any method using a dye-donating compound can be adopted.

【0011】また拡散転写に用いる画像形成用溶媒とし
ては例えば水があり、この水は所謂純水に限らず、広く
慣習的に使われる意味での水を含む。さらに純水とメタ
ノール、DMF、アセトン、及びジイソブチルケトン等
の低沸点溶媒との混合溶媒でも良い。さらにまた画像形
成促進剤、カブリ防止剤、現像停止剤、及び親水性熱溶
剤等を含有させた溶液でも良い。
The image forming solvent used for the diffusion transfer is, for example, water, and this water is not limited to so-called pure water but includes water in a widely and commonly used meaning. Further, a mixed solvent of pure water and a low boiling point solvent such as methanol, DMF, acetone, and diisobutyl ketone may be used. Further, a solution containing an image formation accelerator, an antifoggant, a development terminator, a hydrophilic thermal solvent and the like may be used.

【0012】[0012]

【実施例】以下、この発明の実施例を図面を参照して説
明する。図1はこの発明に係わる点灯制御方法が適用さ
れる複写機の概略構成図を示している。まず複写機の搬
送系について説明する。本体11内には感材マガジン1
3が配置されており、感材マガジン13内には感光材料
15がロール状に巻回されて収納されている。感材マガ
ジン13から引き出された感光材料15は、カッタ17
により所定長に切断されたのち露光部19へ搬送され
る。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic block diagram of a copying machine to which the lighting control method according to the present invention is applied. First, the transport system of the copying machine will be described. Sensitive material magazine 1 in main body 11
3, the photosensitive material 15 is wound in a roll shape and stored in the photosensitive material magazine 13. The photosensitive material 15 pulled out from the photosensitive material magazine 13 is a cutter 17
Then, after being cut into a predetermined length, it is conveyed to the exposure unit 19.

【0013】露光部19に搬送された感光材料15は、
後述するスキャナ45の走査と同期しながら搬送されて
走査露光され、走査露光後、水塗布部21へ搬送され
る。露光された感光材料15は、水塗布部21で水が塗
布されて熱現像転写部23へ搬送される。さらに本体1
1内には受材マガジン25が配置されており、受材マガ
ジン25内には、受材材料27がロール状に巻回されて
収納されている。受材マガジン25から引き出された受
材材料27は、カッタ29により所定長に切断されたの
ち熱現像転写部23へ搬送される。
The photosensitive material 15 conveyed to the exposure section 19 is
The sheet is conveyed and scanned and exposed in synchronism with the scanning of the scanner 45 described later, and after the scanning and exposure, the sheet is conveyed to the water coating section 21. The exposed photosensitive material 15 is coated with water in the water coating section 21 and conveyed to the thermal development transfer section 23. Further body 1
A receiving material magazine 25 is disposed in the receiving material magazine 1, and a receiving material 27 is wound and stored in a roll shape in the receiving material magazine 25. The receiving material 27 drawn out from the receiving magazine 25 is cut into a predetermined length by a cutter 29 and then conveyed to the heat development transfer section 23.

【0014】熱現像転写部23に搬送された感光材料1
5及び受材材料27は互いに重ね合わされて加熱現像転
写が行われる。熱現像転写部23は、発熱体31が内蔵
された加熱ドラム33と無端圧接ベルト35とで構成さ
れている。互いに重ね合わされた感光材料15及び受材
材料27は、無端圧接ベルト35により加熱ドラム33
の外周へ押圧され、重ね合わされた状態で加熱ドラム3
3の周面上を挟持搬送されることにより熱現像される。
Photosensitive material 1 conveyed to heat development transfer section 23
5 and the receiving material 27 are superposed on each other and heat development transfer is performed. The heat development transfer unit 23 is composed of a heating drum 33 having a heating element 31 built therein and an endless pressure contact belt 35. The photosensitive material 15 and the receiving material 27, which are superposed on each other, are heated by the endless press belt 35 to the heating drum 33.
The heating drum 3 is pressed against the outer circumference of the
Thermal development is carried out by being nipped and conveyed on the peripheral surface of 3.

【0015】上記各工程からなる現像サイクルは約35
秒を要する。加熱現像転写された後、感光材料15及び
受材材料27は剥離され、感光材料15は廃棄感光材料
収容箱37へ送出され、受材材料27はトレイ38内に
集積される。つぎに複写機の光学系について説明する。
この複写機は、外部に光透過型原稿を照明する透過光源
装置140と本体に光反射型原稿を照明する反射光源装
置40とを備えている。
The developing cycle consisting of the above steps is about 35.
Takes seconds. After thermal development transfer, the photosensitive material 15 and the receiving material 27 are peeled off, the photosensitive material 15 is sent to the waste photosensitive material storage box 37, and the receiving material 27 is accumulated in the tray 38. Next, the optical system of the copying machine will be described.
This copying machine includes a transmissive light source device 140 for illuminating a light transmissive original to the outside and a reflective light source device 40 for illuminating a light reflective original on the main body.

【0016】以下、反射光源装置40について説明す
る。ハロゲンランプで構成される光源43とミラー47
aとを有するスキャナ45は、ホームポジションHPを
移動して待機位置Wに到達して原稿載置台41に載置さ
れた光反射型原稿を矢印方向に走査し画像光を得る。得
られた画像光はミラー47b、cで反射されてレンズ部
51、絞り板53及び色フィルタ55a、bで構成され
るレンズ部49に入射される。
The reflection light source device 40 will be described below. Light source 43 composed of halogen lamp and mirror 47
The scanner 45 having “a” moves the home position HP, reaches the standby position W, and scans the light-reflective document placed on the document table 41 in the arrow direction to obtain image light. The obtained image light is reflected by the mirrors 47b and 47c and is incident on the lens unit 49 including the lens unit 51, the diaphragm plate 53, and the color filters 55a and 55b.

【0017】レンズ部49を通過した光は可動ミラー部
57を構成するミラー47d、47eでそれぞれ反射さ
れ、さらにミラー47fで反射された後、露光部19に
達する。つぎに透過光源装置140について説明する。
透過光源装置140は、ハロゲンランプで構成される光
源143を有する光源部145と、光透過型原稿が載置
される原稿載置台141と、ズームレンズ151及び絞
り板153とを有するレンズ部149と、色フィルタ1
55a、bとミラー147とで構成される。
The light that has passed through the lens unit 49 is reflected by the mirrors 47d and 47e that form the movable mirror unit 57, and further reflected by the mirror 47f, and then reaches the exposure unit 19. Next, the transmissive light source device 140 will be described.
The transmissive light source device 140 includes a light source unit 145 having a light source 143 composed of a halogen lamp, a document mounting table 141 on which a light transmissive document is mounted, a lens unit 149 having a zoom lens 151 and an aperture plate 153. , Color filter 1
55 a, b and a mirror 147.

【0018】原稿を載置した原稿載置台141は、ホー
ムポジションを移動して待機位置に到達し、原稿を透過
した画像光は、レンズ部149に入射される。レンズ部
149を通過した光は色フィルタ155a,bを介した
のち、ミラー147で透過光源装置140外に反射され
る。透過光源装置140が選択されている場合は、本体
11のミラー47eを光路から後退させ、透過光源装置
140からの光線がミラー47fで反射されて露光部1
9に到達するように成されている。
The document table 141 on which the document is placed moves from the home position to the standby position, and the image light transmitted through the document is incident on the lens unit 149. The light passing through the lens unit 149 passes through the color filters 155a and 155b, and then is reflected by the mirror 147 to the outside of the transmissive light source device 140. When the transmissive light source device 140 is selected, the mirror 47e of the main body 11 is retracted from the optical path, and the light beam from the transmissive light source device 140 is reflected by the mirror 47f, so that the exposure unit 1 is exposed.
It is designed to reach 9.

【0019】以下、図2及び図3を参照して光源43、
143の点灯制御について説明する。図2(a)乃至
(c)はハロゲンランプで構成される光源43、143
の各画像形成倍率での点灯タイミングを示している。ま
ず図2(b)に示した画像形成倍率100%について説
明する。画像形成が指示されると、スキャナ45は、ホ
ームポジションHPを移動して待機位置Wへ到達する。
この移動時に、ハロゲンランプを予備点灯(PL)させ
る。
Hereinafter, referring to FIGS. 2 and 3, the light source 43,
The lighting control of 143 will be described. 2A to 2C show light sources 43 and 143 composed of halogen lamps.
The lighting timing at each image forming magnification is shown. First, the image forming magnification of 100% shown in FIG. 2B will be described. When the image formation is instructed, the scanner 45 moves from the home position HP to reach the standby position W.
During this movement, the halogen lamp is pre-lit (PL).

【0020】待機位置Wへ到達し露光開始までの待機時
では、一点集中照射を避けるためにハロゲンランプを消
灯(LO)する。設定される画像形成倍率等の画像形成
条件に応じてレンズ部149及び可動ミラー部57が所
定位置に到達して露光開始可能状態になると、ハロゲン
ランプを露光点灯(ML)させる。さらにスキャナ45
が待機位置WからホームポジションHPへ移動して露光
が終了した後も、ホームポジションHPで所定時間ハロ
ゲンランプを点灯保持(AL)して管壁温度を維持す
る。ハロゲンランプの総点灯時間は、ハロゲンサイクル
を考慮して設定される。
During the waiting time until reaching the standby position W and starting the exposure, the halogen lamp is turned off (LO) in order to avoid the one-point concentrated irradiation. When the lens unit 149 and the movable mirror unit 57 reach a predetermined position and start the exposure according to the image forming conditions such as the set image forming magnification, the halogen lamp is exposed to light (ML). Further scanner 45
Even after moving from the standby position W to the home position HP and ending the exposure, the halogen lamp is kept lit (AL) for a predetermined time at the home position HP to maintain the tube wall temperature. The total lighting time of the halogen lamp is set in consideration of the halogen cycle.

【0021】図2(a)、(c)に示した画像形成倍率
50%、200%についても同様の原理により点灯タイ
ミングが制御される。すなわち露光点灯(ML)時間
は、画像形成条件により変化するが、これに応じて予備
点灯(PL)時間も変化させ、結果的に、露光点灯(M
L)時間と予備点灯(PL)時間との和が一定となるよ
うに制御される。
With respect to the image forming magnifications of 50% and 200% shown in FIGS. 2A and 2C, the lighting timing is controlled by the same principle. That is, the exposure lighting (ML) time changes depending on the image forming condition, but the preliminary lighting (PL) time is also changed accordingly, and as a result, the exposure lighting (ML) time changes.
The sum of the (L) time and the preliminary lighting (PL) time is controlled to be constant.

【0022】このようにハロゲンランプの点灯時期を露
光時に限らず、移動時及び露光終了後にまで及ばせるこ
とにより、管壁を適当温度範囲に維持することができ
る。従って、特に連続画像形成を行う場合においては、
管壁温度が下がり過ぎる前に次の露光を行うことができ
るので、ハロゲンランプを常に適当な環境下で使用する
ことができハロゲンランプの寿命を損なうことがない。
As described above, the lighting timing of the halogen lamp is not limited to the time of exposure, but can be extended to the time of movement and after the end of exposure, whereby the tube wall can be maintained in an appropriate temperature range. Therefore, especially when performing continuous image formation,
Since the next exposure can be performed before the temperature of the tube wall becomes too low, the halogen lamp can always be used in an appropriate environment and the life of the halogen lamp is not impaired.

【0023】一方、露光時間は設定される画像形成倍率
及び原稿種類等の画像形成条件により異なる。これに対
処する為に、移動時での点灯時間を図2(a)、(c)
に示すように制御している。この様子を図3を参照して
説明する。図3は上記画像形成条件のうち画像形成倍率
に応じたハロゲンランプの点灯時間を示している。図に
おいて縦軸は、画像形成倍率(%)を示しており、横軸
は、ハロゲンランプの点灯時間(s)を示している。
On the other hand, the exposure time differs depending on the image forming conditions such as the image forming magnification and the type of the original that are set. In order to deal with this, the lighting time during movement is set as shown in FIGS. 2 (a) and 2 (c).
It is controlled as shown in. This situation will be described with reference to FIG. FIG. 3 shows the lighting time of the halogen lamp according to the image forming magnification of the image forming conditions. In the figure, the vertical axis represents the image forming magnification (%), and the horizontal axis represents the lighting time (s) of the halogen lamp.

【0024】露光時間は、設定される画像形成倍率に応
じて次第に長くなる。すなわち図3において、画像形成
倍率50%のときの露光時間が最も短く、画像形成倍率
200%のときの露光時間が最も長い。設定される画像
形成倍率に拘わらず、単位画像形成におけるハロゲンラ
ンプの点灯時間を一定時間に設定する為に、順次変化す
る露光時間に対応して移動時でのハロゲンランプの点灯
時間も順次変化させている。
The exposure time gradually becomes longer according to the set image forming magnification. That is, in FIG. 3, the exposure time is shortest when the image forming magnification is 50%, and the longest exposure time is when the image forming magnification is 200%. Regardless of the image forming magnification set, in order to set the lighting time of the halogen lamp in unit image formation to a fixed time, the lighting time of the halogen lamp during movement is also sequentially changed corresponding to the exposure time that changes sequentially. ing.

【0025】すなわち画像形成倍率50%のときは、ス
キャナ44の移動速度を遅くして移動時の点灯時間が長
くなるように設定し、画像形成倍率200%のときは、
スキャナ44の移動速度を速くして移動時の点灯時間が
短かくなるように設定する。この実施例では、図1に示
した装置の現像サイクル所要時間35sを考慮して、ハ
ロゲンランプの総点灯時間が12(s)となるように設
定されるている。
That is, when the image forming magnification is 50%, the moving speed of the scanner 44 is set to be slow and the lighting time during the movement is set to be long, and when the image forming magnification is 200%,
The moving speed of the scanner 44 is set to be high so that the lighting time during the movement is short. In this embodiment, the total lighting time of the halogen lamp is set to 12 (s) in consideration of the developing cycle required time 35 s of the apparatus shown in FIG.

【0026】これにより画像形成条件に拘わりなく単位
画像形成毎のハロゲンランプの総点灯時間を一定にする
ことができる。なお上記実施例では、スキャナ45が、
ホームポジションHPを移動して一旦待機位置Wへ到達
し、その後待機位置WからホームポジションHP方向へ
逆走査する方式について説明したが、これとは逆の走査
方向を有する順走査方式についても同様にして、ハロゲ
ンランプの点灯時間を制御することができる。
As a result, the total lighting time of the halogen lamp for each unit image formation can be made constant regardless of the image formation conditions. In the above embodiment, the scanner 45 is
Although the method of moving the home position HP to once reach the standby position W and then performing reverse scanning from the standby position W in the home position HP direction has been described, the same applies to a forward scanning method having a scanning direction opposite to this. Thus, the lighting time of the halogen lamp can be controlled.

【0027】さらに透過光源装置140についても、原
稿載置台141がスライドすることにより、光源143
がホームポジションを移動して待機位置へ到達する構成
となるので、反射光源装置40と同様にして、ハロゲン
ランプの点灯時間を制御することができる。以上説明し
た実施例では、スキャナによる走査露光について説明し
たが、これに限定されるものではなく、全面露光につい
ても適用可能であることは勿論である。
Further, also with respect to the transmissive light source device 140, the light source 143 is generated by sliding the document placing table 141.
Is configured to move from the home position to reach the standby position, so that the halogen lamp lighting time can be controlled in the same manner as the reflected light source device 40. In the embodiment described above, the scanning exposure by the scanner has been described, but the present invention is not limited to this, and it is needless to say that the whole exposure can be applied.

【0028】[0028]

【発明の効果】以上説明した発明によれば、光源である
ハロゲンランプを予備点灯させ管壁が適当温度範囲にな
ってから露光点灯させているので、ハロゲンランプの寿
命を損なうことがない。また設定される画像形成条件に
より露光時間が変化する場合においても、この変化に応
じて予備点灯される時間を制御しているので、単位画像
形成毎のハロゲンランプの点灯時間を一定にすることが
できる。これにより管壁温度を250乃至550度に維
持することができるのでハロゲンランプ寿命を損なうこ
とがない。
According to the invention described above, the halogen lamp, which is a light source, is pre-lighted and the lamp is exposed and lighted after the temperature of the tube wall reaches an appropriate temperature range. Therefore, the life of the halogen lamp is not impaired. Even when the exposure time changes depending on the set image forming conditions, the pre-lighting time is controlled according to this change, so that the halogen lamp lighting time for each unit image formation can be kept constant. it can. As a result, the tube wall temperature can be maintained at 250 to 550 degrees, so that the life of the halogen lamp is not impaired.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明に係わる点灯制御方法が適用される複
写機を示す概略構成図。
FIG. 1 is a schematic configuration diagram showing a copying machine to which a lighting control method according to the present invention is applied.

【図2】光源の点灯タイミングを示すタイミング図。FIG. 2 is a timing chart showing a lighting timing of a light source.

【図3】画像形成倍率を考慮した点灯時間を示す説明
図。
FIG. 3 is an explanatory diagram showing a lighting time in consideration of an image forming magnification.

【符号の説明】[Explanation of symbols]

19 露光部、 40 反射光源装置、 41、141 原稿載置台、 43、143 光源、 45 スキャナ、 140 透過光源装置、 151 ズームレンズ。 19 exposure unit, 40 reflection light source device, 41, 141 original document mounting table, 43, 143 light source, 45 scanner, 140 transmission light source device, 151 zoom lens

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 複写機における露光時に光源を予備点灯
させて該光源が適当温度範囲に成されてから露光点灯さ
せるとともに、画像形成条件により露光時間が変化して
も、該変化に対応させて前記予備点灯される時間を制御
して単位画像形成毎の光源の総点灯時間を一定にするこ
とを特徴とする原稿照明用光源の点灯制御方法。
1. A light source is preliminarily turned on at the time of exposure in a copying machine to be turned on after the light source is in an appropriate temperature range, and even if the exposure time is changed depending on image forming conditions, the change is dealt with. A method for controlling lighting of a light source for document illumination, characterized in that the total lighting time of the light source for each unit image formation is made constant by controlling the pre-lighting time.
JP34512992A 1992-12-02 1992-12-02 Lighting control method of light source for document illumination in copying machine Expired - Fee Related JP2916563B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34512992A JP2916563B2 (en) 1992-12-02 1992-12-02 Lighting control method of light source for document illumination in copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34512992A JP2916563B2 (en) 1992-12-02 1992-12-02 Lighting control method of light source for document illumination in copying machine

Publications (2)

Publication Number Publication Date
JPH06175240A true JPH06175240A (en) 1994-06-24
JP2916563B2 JP2916563B2 (en) 1999-07-05

Family

ID=18374484

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34512992A Expired - Fee Related JP2916563B2 (en) 1992-12-02 1992-12-02 Lighting control method of light source for document illumination in copying machine

Country Status (1)

Country Link
JP (1) JP2916563B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10204066A1 (en) * 2002-01-31 2003-08-14 Voith Turbo Kg Turbo drive unit has exhaust gas turbine with a two wheeled hydrodynamic unit connected to the crankshaft, e.g. for use in vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10204066A1 (en) * 2002-01-31 2003-08-14 Voith Turbo Kg Turbo drive unit has exhaust gas turbine with a two wheeled hydrodynamic unit connected to the crankshaft, e.g. for use in vehicle

Also Published As

Publication number Publication date
JP2916563B2 (en) 1999-07-05

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