WO1993013455A1 - Exposure device of image formation apparatus - Google Patents

Exposure device of image formation apparatus Download PDF

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Publication number
WO1993013455A1
WO1993013455A1 PCT/JP1988/000622 JP8800622W WO9313455A1 WO 1993013455 A1 WO1993013455 A1 WO 1993013455A1 JP 8800622 W JP8800622 W JP 8800622W WO 9313455 A1 WO9313455 A1 WO 9313455A1
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WIPO (PCT)
Prior art keywords
exposure
film
light
lamp
original
Prior art date
Application number
PCT/JP1988/000622
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French (fr)
Japanese (ja)
Inventor
Kenichi Shimizu
Original Assignee
Kenichi Shimizu
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 Kenichi Shimizu filed Critical Kenichi Shimizu
Priority to US07/315,898 priority Critical patent/US4924260A/en
Publication of WO1993013455A1 publication Critical patent/WO1993013455A1/en

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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B27/00Photographic printing apparatus
    • G03B27/32Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52Details
    • G03B27/54Lamp housings; Illuminating means
    • G03B27/542Lamp housings; Illuminating means for copying cameras, reflex exposure lighting

Definitions

  • the present invention relates to an image forming apparatus, and more particularly, to an exposure apparatus of an image forming apparatus suitable for forming an image on a document on a photoreceptor film.
  • This technology includes a document table, a light source for irradiating a document placed on the document table, photosensitive film holding means for detachably holding a photosensitive film at a printing position, and Image optical system for guiding the reflected light of the photosensitive film to the photosensitive film surface, a shutter arranged on the image optical system for controlling exposure of the photosensitive film, and a start for starting photographing on the photosensitive film A switch for outputting a signal; and an operation control unit for outputting a control signal to at least the light source and the shutter.
  • An optical path length from the light source to the photosensitive film is predetermined, and the operation control section opens a shutter based on a start signal from the switch means. It is characterized in that the light source emits light a predetermined number of times and a shutter closing signal for closing the shutter is output.
  • the present invention has been made on the basis of such a background, and aims at eliminating particularly unevenness of a photographed image. Disclosure of the invention
  • the present invention does not cause a plurality of flash lamps to cause uneven exposure due to the reciprocity failure in the film.
  • the gist is to emit light with a small amount of light.
  • FIG. 1 is an external view of an image forming apparatus according to the present invention
  • FIG. 2 is a front view schematically showing an optical system portion thereof
  • FIG. 3 is a peripheral and side view
  • FIG. 5 is a diagram showing a relationship between a document surface and an exposure amount
  • FIG. 5 is a diagram showing a relationship between a lamp emission order and a film transmittance
  • FIG. 6 is an external view showing a state of a conventional slide creation.
  • FIG. 2 is an external view of the image forming apparatus according to the present invention
  • FIG. 2 is a front view schematically showing the optical system
  • FIG. 3 is the same view, side view
  • FIG. 4 is the original surface by the exposure control of the present invention
  • Fig. 5 is a diagram showing the relationship between the light emission intensity of the lamp and the film transmittance.
  • the image forming apparatus has a document pressing plate 2, a camera 3 for photographing, and an operation unit 4.
  • a document 1 is placed on a contact glass 5 and is pressed by a pressure plate 2.
  • the original 1 is exposed by the flash lamp 6, and the reflected light from the original 1 is reflected by the first mirror 7 and the second mirror 8, passes through the photographing lens 9, and is on the film 10.
  • Film 1 0 Is set in the camera 3, and is exposed by opening a shutter that is cycled by the emission of the flash lamp 6.
  • each flash lamp unit has a flash lamp unit 6-1 and 6-2, a reflector 13-1 and 13-2, and a diffuser 12-1 and 12-2. It is facing.
  • the capacitor (not shown) When the original 1 is set and the print key (not shown) on the operation unit 4 is pressed, the capacitor (not shown) is charged and the lamp 6-1 emits light first. After flashing, the capacitor is charged. In the future, the lamp 6-2 will emit light and the exposure will end.
  • the exposure distribution on the original surface be as uniform as possible.However, since the lamp 6 is placed in a device with a limited space, the original 1 and the lamp 6 come close to Since it is extremely difficult to eliminate exposure unevenness if there is only one lamp, this system installed lamps at two locations. Also, rather than letting the two lamps 6-1 and 6-2 fire at the same time, it is better to fire the lamps one by one to measure the output light quantity of each lamp and quench the light emission when the set light quantity is reached. Can be done. Also, the capacitor capacity can be small.
  • the exposure glare on the document surface could be almost eliminated by using two lamps.
  • the film was Polaroid's high contrast positive film “Polagra Using a film (trade name), a document with a fixed degree of drop was photographed, developed, and the transmittance of the film was measured. The transmittance became uneven from the front to the back of the film. Tetsu Then, when the luminous order of the lamp was reversed, the transmittance of the film showed a completely opposite tendency. This is shown in Figure 5.
  • the front lamp 6-1 exposes much of the whole document 1, and the rear lamp 6-2 exposes much of the back of the original 1. Therefore, as a film characteristic, the part receiving the strong light in the first light emission and receiving the weak light in the second light emission receives the weak light in the first light emission and the strong light in the second light emission. It can be seen that there is a property that it appears that the amount of exposure is greater than that of the part that received light.
  • the amount of exposure at one time is reduced in the present invention.
  • Light emission is performed 10 times, and the light emission is alternately performed 10 times so that a necessary exposure amount is obtained.
  • the number of repetitions of light emission is better, but the greater the number of repetitions, the longer the ridge required for shooting will be.Therefore, the number of repetitions is 2 to 10 times. It should just be about.
  • Fig. 4 shows this situation, where A is the total exposure distribution, B is the 2n-th exposure distribution, and C is the (2n-1) -th exposure. Shows the distribution. However, n> 1.
  • the present invention is as described above. According to the exposure apparatus of the image forming apparatus according to the present invention, a plurality of lamps are made to emit light alternately to perform exposure, so that the influence of reciprocity failure is eliminated. It can be corrected.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Control Of Exposure In Printing And Copying (AREA)

Abstract

This invention relates to an image formation apparatus which gives a copied image on a photosensitive film by turning on alternately a plurality of flash lamps disposed to oppose an original to emit light so as to expose the original. When a necessary quantity of exposure is given to the photosensitive film, each of these flash lamps is alternately turned on to emit light a plurality of times even when the necessary quantity of light can be obtained by turning on each lamp only once, in order to prevent exposure variance of the film due to reciprocity low failure.

Description

明 加  Meika
画像形成装置の露光装置 技術分野 Exposure equipment for image forming equipment
本発明は、 画像形成装置に係 り 、 特に原稿上の画像を 感光体フ ィ ルム上に形成す るの に好適な画像形成装置の 露光装置に関する 。 背景技術  The present invention relates to an image forming apparatus, and more particularly, to an exposure apparatus of an image forming apparatus suitable for forming an image on a document on a photoreceptor film. Background art
従来、 各種発表な ど に用 い ら れるスラ イ ドの作成は 、 第 6図 に示す よ う に 、 3 5 ro»刀 メ ラ 1 0 1 をス タ ン ド 1 0 2に下向き に固定 し 、 ス タ ン ド 1 04に保持さ れたフ ラッ シュラ ンプな どの光源 03で原稿 1 0 5を照 ら し カ メ ラ 1 0 1 のシャ ッ タ ー を切つ て撮影する こ と に よつ て行っ て いる 。 こ の際、 操作者は 、 原稿 1 0 5のサイ ズ に よっ て カ メ ラ の高さ を調節 し ピン 卜 を合わせ 、 ま た原 稿 1 0 5の種類、 光源 1 0 3の種類、 明るさ に よっ て シ ャッ タ ーの速度や絞 り 量を決定す る必要が wる 。  Conventionally, slides used for various presentations are created by fixing 35 ro »sword roller 101 to stand 102 as shown in Fig. 6. By illuminating the original 105 with the light source 03 such as a flash lamp held in the stand 104, the shutter of the camera 101 is cut off and photographed. I am going. At this time, the operator adjusts the camera height by adjusting the height of the camera according to the size of the original 105, and also adjusts the type of the original 105, the type of the light source 103, and the brightness. Therefore, it is necessary to determine the shutter speed and the amount of throttle.
し か し 、 こ の よ う な操作は熟練を要 し 、 写真技術に 関 す る知識のある者でない と所望のスラ イ Kを製作する こ と が困難であっ た 。  However, such an operation requires skill, and it is difficult to produce a desired slide K unless one has knowledge of photographic technology.
こ の よ う な従来技術の欠点を解消 し 、 熟練を要す る こ と な く 、 簡略な操作で鮮明な画像が形成でぎる画像形成 装置を提供すべ く 、 本出願人は特願昭 6 2— 9 5 3 7 4 号の如き提案を行った。 In order to eliminate such drawbacks of the prior art and to provide an image forming apparatus capable of forming a clear image with a simple operation without requiring skill, the applicant of the present application has filed Japanese Patent Application No. 2— 9 5 3 7 4 I made a proposal like No.
この技術は、 原稿載置台と、 その原稿載置台に載置さ れた原稿を照射する光源と 、 感光性フ ィルムを桔像位置 に着脱可能に保持する感光性フイ ルム保持手段と、 原稿 からの反射光を前記感光性フイルム面に導く 桔像光学系 と、 その锫像光学系上に配置され感光性フィルムを露光 制御するシャッタ ー と、 前記感光性フィルムへの撮影を 開始するスタ ー 卜信号を出力するスィ ッチ手段と、 少な く とも前記光源ならびにシャッタ ー に対して制御信号を 出力する動作制御部とを備える。  This technology includes a document table, a light source for irradiating a document placed on the document table, photosensitive film holding means for detachably holding a photosensitive film at a printing position, and Image optical system for guiding the reflected light of the photosensitive film to the photosensitive film surface, a shutter arranged on the image optical system for controlling exposure of the photosensitive film, and a start for starting photographing on the photosensitive film A switch for outputting a signal; and an operation control unit for outputting a control signal to at least the light source and the shutter.
そして、 前記光源から感光性フイ ルムまでの光路長が 予め決められており 、 前記動作制御部が前記スィッチ手 段からのスタ ー 卜信号に基づいてシャッタ ーを開く シャ ッタ ー開き信号と、 光源が所定回数発光する発光手段と、 シャッタ ーを閉じるシャッタ ー閉じ信号とを履次出力す るよう に構成されていることを特徴とするものである。  An optical path length from the light source to the photosensitive film is predetermined, and the operation control section opens a shutter based on a start signal from the switch means. It is characterized in that the light source emits light a predetermined number of times and a shutter closing signal for closing the shutter is output.
しかしながら、 上述の技術においては、 画像濃度ムラ が発生する という新たな問題が生じた。  However, the above technique has a new problem that image density unevenness occurs.
本発明はこの様な背景に基づいてなされたものであ り 、 特に撮影像の ¾度ムラをなく すこ とを目的とするもので める 。 発明の開示  The present invention has been made on the basis of such a background, and aims at eliminating particularly unevenness of a photographed image. Disclosure of the invention
本発明は、 複数のフラッシュランプを、 展々 に且つフ イルムに相反則不軌の影響に よる露光ムラを生じさせな い程度の光量で発光させるこ とをその要旨 とするもので ある。 図面の簡単な説明 The present invention does not cause a plurality of flash lamps to cause uneven exposure due to the reciprocity failure in the film. The gist is to emit light with a small amount of light. BRIEF DESCRIPTION OF THE FIGURES
第 1 図は本発明に係る画像形成装置の外観図、 第 2 図 はその光学系部分を略示する正面図、 第 3 図は周、 側面 図、 第 4 図は本発明の露光制御に よる原稿面と露光量の 関係を示す図、 第 5 図はランプ発光順序と フ ィルム透過 率の関係を表 した図、 第 6 図は従来のスライ ド作成の状 態を示す外観図である。 発明を実施する最良の形態  FIG. 1 is an external view of an image forming apparatus according to the present invention, FIG. 2 is a front view schematically showing an optical system portion thereof, FIG. 3 is a peripheral and side view, and FIG. FIG. 5 is a diagram showing a relationship between a document surface and an exposure amount, FIG. 5 is a diagram showing a relationship between a lamp emission order and a film transmittance, and FIG. 6 is an external view showing a state of a conventional slide creation. BEST MODE FOR CARRYING OUT THE INVENTION
以下、 本発明の一実施例を図面に基づいて説明する。  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
図は本発明に係る画像形成装置の外観図、 第 2 図 はその光学系部分を略示する正面図、 第 3 図は同、 側面 図、 第 4 図は本発明の露光制御に よる原稿面と露光量の 関係を示す図、 第 5 図はランプ発光顕序と フ イルム透過 率の関係を表 した図である。  FIG. 2 is an external view of the image forming apparatus according to the present invention, FIG. 2 is a front view schematically showing the optical system, FIG. 3 is the same view, side view, and FIG. 4 is the original surface by the exposure control of the present invention. Fig. 5 is a diagram showing the relationship between the light emission intensity of the lamp and the film transmittance.
第 1 図において 、 画像形成装置は原稿押さえ用圧板 2 撮影用 カ メ ラ 3、 操作部 4 を有す 。  In FIG. 1, the image forming apparatus has a document pressing plate 2, a camera 3 for photographing, and an operation unit 4.
第 2 図において 、 コ ンタ ク 卜 ガラス 5 の上に原稿 1 が 置かれ、 圧板 2 に よ り押さ え られている。 フ ラッシュラ ンプ 6 に よ り原稿 1 が露光さ れ、 原稿 1 からの反射光は 第 1 ミ ラー 7 、 第 2 ミ ラー 8 で反射され、 撮影用 レンズ 9 を通過 し 、 フ ィ ルム 1 0上で結像する。 フ イ ルム 1 0 はカ メ ラ 3 内にセッ トされてお り 、 フラッシュランプ 6 の発光に周期 したシャツタ が開 く こ と に よ り露光される。 In FIG. 2, a document 1 is placed on a contact glass 5 and is pressed by a pressure plate 2. The original 1 is exposed by the flash lamp 6, and the reflected light from the original 1 is reflected by the first mirror 7 and the second mirror 8, passes through the photographing lens 9, and is on the film 10. Image. Film 1 0 Is set in the camera 3, and is exposed by opening a shutter that is cycled by the emission of the flash lamp 6.
第 3 図において、 原稿 1 の前後方向のほぼ対称位置に 2 つのフラッシュラ ンプュニッ 卜 1 1 一 1 , 1 1 一 2 が ある。 それぞれのフラッシュランプユニッ ト にはフラッ シュランプユニッ ト 6— 1 , 6— 2 、 反射板 1 3— 1 , 1 3— 2 、 拡散板 1 2— 1 , 1 2— 2があり 、 原稿面方 向を向いている。  In FIG. 3, there are two flash lamp units 1 1 1 1 1 and 1 1 1 1 1 at approximately symmetric positions in the front-back direction of the original 1. Each flash lamp unit has a flash lamp unit 6-1 and 6-2, a reflector 13-1 and 13-2, and a diffuser 12-1 and 12-2. It is facing.
原稿 1 をセッ 卜 し、 操作部 4のプ リ ン 卜キー ( 図示せ ず 〉 を押すと、 コ ンデンサ ( 図示せず ) が充電され、 ま ずランプ 6— 1 が発光する。 ランプ 6— 1 が発光後、 再 ぴコ ンデンサが充電され、 今後はランプ 6— 2 が発光し、 露光が終了する。  When the original 1 is set and the print key (not shown) on the operation unit 4 is pressed, the capacitor (not shown) is charged and the lamp 6-1 emits light first. After flashing, the capacitor is charged. In the future, the lamp 6-2 will emit light and the exposure will end.
原稿面の露光分布は、 出来る限りムラのないこ とが望 まれるが、 限られたスペースの装置内にランプ 6を配置 するために、 原稿 1 面とランプ 6が接近して しまい、 ラ ンプ 6 が 1 本だと露光ムラを無く すことが非常に困難に なるため、 本装置ではランプを 2 力所に設けた。 また、 2本のランプ 6— 1 , 6— 2 を同時に発光させるよ り 、 Ί 本ずつ発光させた方がそれぞれのランプの出力光量を 測光し設定光量に達した時点で出光をクェンチングする こ とが出来る。 又コ ンデンサ容量が小さ く て済む。  It is desired that the exposure distribution on the original surface be as uniform as possible.However, since the lamp 6 is placed in a device with a limited space, the original 1 and the lamp 6 come close to Since it is extremely difficult to eliminate exposure unevenness if there is only one lamp, this system installed lamps at two locations. Also, rather than letting the two lamps 6-1 and 6-2 fire at the same time, it is better to fire the lamps one by one to measure the output light quantity of each lamp and quench the light emission when the set light quantity is reached. Can be done. Also, the capacitor capacity can be small.
本装置では、 2本のランプを用いて原稿面での露光ム ラを殆ど無く すこ とが出来たのだが、 フィルム と してポ ラ ロ イ ド社のハイ コ ン トラス トポジフィルム 「ポラグラ フ 」 (商品名 ) を使用 し 、 滴度が一定の原稿を撮影後、 現像し フ イルムの透過率を測定 した と ころ、 フ ィ ルムの 前部から後部にかけて 、 透過率が不均一になって し まつ た。 そこでラ ンプの発光類序を反対に した と ころ、 フ ィ ルムの透過率は全く 逆の傾向を示した。 これを第 5 図に 示す。 With this device, the exposure glare on the document surface could be almost eliminated by using two lamps. However, the film was Polaroid's high contrast positive film “Polagra Using a film (trade name), a document with a fixed degree of drop was photographed, developed, and the transmittance of the film was measured. The transmittance became uneven from the front to the back of the film. Tetsu Then, when the luminous order of the lamp was reversed, the transmittance of the film showed a completely opposite tendency. This is shown in Figure 5.
前のランプ 6— 1 は原稿 1 の全部を多く 露光し 、 後の ランプ 6— 2 は原稿 1 の後部を多く露光する。 従って 、 フ ィルムの特性と して 1 回目の発光で強い光を受け 、 2 回目 の発光で弱い光を受けた部分の方が、 1 回目 の発光 で弱い光を受け、 2 回目 の発光で強い光を受けた部分よ り 、 露光量が多く なつたよ う に見える とい う性質のある こ とがわかる。  The front lamp 6-1 exposes much of the whole document 1, and the rear lamp 6-2 exposes much of the back of the original 1. Therefore, as a film characteristic, the part receiving the strong light in the first light emission and receiving the weak light in the second light emission receives the weak light in the first light emission and the strong light in the second light emission. It can be seen that there is a property that it appears that the amount of exposure is greater than that of the part that received light.
そこで、 前後同一特性の光源でフィ ルム前面を均一な 現像糠度とするために 、 本発明では 1 回での露光量を少 な く し 、 例えば必要光量の 1ノ 1 0の発光量を 1 回の発光 で行い、 それを交互に 1 0 回発光させ、 必要な露光量を 得るよう にする。  Therefore, in order to make the front surface of the film uniform with the light source having the same characteristics before and after, the amount of exposure at one time is reduced in the present invention. Light emission is performed 10 times, and the light emission is alternately performed 10 times so that a necessary exposure amount is obtained.
こ う するこ と に よ り 、 相反則不軌の影罾を殆ど受ける こ とな く 、 濂度ムラのない画像を得るこ とが出来た 。 こ の場合、 発光の操り返 し数は多い方が良いが、 操り返 し 数が多い程、 撮影に要する畤藺が長く なつて し ま う ので、 繰 り返 し数は 2〜 1 0 回程度にすれば良い。  By doing so, it was possible to obtain an image with almost no unevenness in the degree of refraction, almost without being affected by reciprocity failure. In this case, the number of repetitions of light emission is better, but the greater the number of repetitions, the longer the ridge required for shooting will be.Therefore, the number of repetitions is 2 to 10 times. It should just be about.
第 4 図はこの様子を示 し 、 A は 卜一タル露光量分布、 B は 2 n 回目露光量分布、 C は ( 2 n — 1 ) 回目露光量 分布を示す。 但し n > 1 である。 Fig. 4 shows this situation, where A is the total exposure distribution, B is the 2n-th exposure distribution, and C is the (2n-1) -th exposure. Shows the distribution. However, n> 1.
尚、 露光量が ^じでも、 露光照度によ り フィ ルムの現 像 S度に差を生ずる現象 (照度 X時間の関係が一定でも ) は一般に相反則不軌と呼ばれており 、 カメ ラなどで撮影 する場合には、 露光時藺の違いによ り レンズの絞りを調 整し、 補正するよう に している。 しか し、 本装置のよう な露光方式では、 フィルムの濃度が場所によ り異なって しまうため、 レンズの絞り だけでは補正できない。  It should be noted that even if the amount of exposure is the same, a phenomenon that causes a difference in the present image S degree of the film due to the exposure illuminance (even when the relationship of illuminance X time is constant) is generally called reciprocity failure, and it is assumed that the When shooting with, the aperture of the lens is adjusted and compensated according to the difference in exposure time. However, with an exposure system such as this one, the density of the film differs depending on the location, and correction cannot be made only with the lens aperture.
またフイルムの種類によ り相反則不軌に差があるが、 本方式の露光法を用いることによ り 、 原稿の両端に設け たランプの発光前後関係による現像濃度差を生ずるこ と はない。 産業上の利用可能性  Although there is a difference in reciprocity failure depending on the type of film, the use of the exposure method of this method does not cause a difference in development density due to the relationship between before and after light emission of lamps provided at both ends of the document. Industrial applicability
本発明は以上述べた通り のものであ り 、 本発明に係る 画像形成装置の露光装置によれば、 複数のランプを交互 に発光させて露光するよう に したので、 相反則不軌の影 響を補正するこ とが出来る。  The present invention is as described above. According to the exposure apparatus of the image forming apparatus according to the present invention, a plurality of lamps are made to emit light alternately to perform exposure, so that the influence of reciprocity failure is eliminated. It can be corrected.

Claims

請 求 の 範 囲 The scope of the claims
1 . 原稿に対向させて配置された複数のフラッシュ ランプを交互に発光させて 、 原稿を露光し 、 感光体フィ ルム上に複写像を得るこ との出来る画像形成装置におい て 、 感光体フィルム上に必要な露光量を得るに際 し、 各 各のランプを交互に 1 回ずつ発光させるだけで必要な光 量が得られる場合でも、 各々 のフラッシュランプを交互 に複数回発光させるこ とによ り 、 相反則不軌に よるフ ィ ルムの露光ムラを防止するよ う に した こ とを特徴とする 画像形成装置の露光装置。 1. In an image forming apparatus capable of exposing a document and obtaining a copy image on a photoreceptor film by alternately emitting a plurality of flash lamps arranged opposite to the document, a photoreceptor film is formed. In order to obtain the required exposure amount, even if the required light amount can be obtained simply by firing each lamp alternately once, the flash lamps can be fired alternately multiple times. An exposure apparatus for an image forming apparatus, wherein exposure unevenness of a film due to reciprocity failure is prevented.
PCT/JP1988/000622 1987-06-23 1988-06-23 Exposure device of image formation apparatus WO1993013455A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US07/315,898 US4924260A (en) 1987-06-23 1988-06-23 Exposure system of image forming apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15454687A JPS6410227A (en) 1987-06-23 1987-06-23 Exposer for image former
JP62/154546 1987-06-23

Publications (1)

Publication Number Publication Date
WO1993013455A1 true WO1993013455A1 (en) 1993-07-08

Family

ID=15586617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1988/000622 WO1993013455A1 (en) 1987-06-23 1988-06-23 Exposure device of image formation apparatus

Country Status (2)

Country Link
JP (1) JPS6410227A (en)
WO (1) WO1993013455A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56164363A (en) * 1980-05-23 1981-12-17 Ricoh Co Ltd Illuminating device of variable magnification copying machine
JPS5778030A (en) * 1980-10-31 1982-05-15 Shimadzu Corp Automatic exposure controlling device
JPS5789748A (en) * 1980-11-25 1982-06-04 Dainippon Screen Mfg Co Ltd Exposure time controlling method of picture copying device
JPS58175535U (en) * 1982-05-19 1983-11-24 コニカ株式会社 CRT image capture device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56164363A (en) * 1980-05-23 1981-12-17 Ricoh Co Ltd Illuminating device of variable magnification copying machine
JPS5778030A (en) * 1980-10-31 1982-05-15 Shimadzu Corp Automatic exposure controlling device
JPS5789748A (en) * 1980-11-25 1982-06-04 Dainippon Screen Mfg Co Ltd Exposure time controlling method of picture copying device
JPS58175535U (en) * 1982-05-19 1983-11-24 コニカ株式会社 CRT image capture device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HASEGAWA SHIGERU, (Shashin Seihan Gijutsu) 10 June 1968, INSATSU SHUPPAN KENKYUSHO (TOKYO), pages 30-31. *

Also Published As

Publication number Publication date
JPS6410227A (en) 1989-01-13

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