JPS61184583A - Slit exposure illuminating device - Google Patents
Slit exposure illuminating deviceInfo
- Publication number
- JPS61184583A JPS61184583A JP2481285A JP2481285A JPS61184583A JP S61184583 A JPS61184583 A JP S61184583A JP 2481285 A JP2481285 A JP 2481285A JP 2481285 A JP2481285 A JP 2481285A JP S61184583 A JPS61184583 A JP S61184583A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- slit
- reflecting mirror
- filament
- 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
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/06—Eliminating residual charges from a reusable imaging member
- G03G21/08—Eliminating residual charges from a reusable imaging member using optical radiation
Landscapes
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は投影焼付装置などの原稿面の照明と感光体の除
電とを兼ねたスリット露光照明装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a slit exposure illumination device for use in a projection printing apparatus, etc., which serves both to illuminate the surface of a document and to eliminate static from a photoreceptor.
従来の技術
従来、この種のスリット露光照明装置は第４図に示すよ
うな構成であった。第４図において、１は線状光源、２
はフィラメントで、発光部と非発光部とを交互に形成し
ている。３は管形バルブ、４は反射鏡、５はスリット孔
で反射鏡４に管軸方向に沿って設けてあり、一つの長孔
からなっている０
このような装置では、反射鏡４の上部のわずかな拡散反
射成分等によりスリット孔５から洩れる光を感光体ドラ
ム（図示せず）面に導き、感光体の除電に利用していた
。すなわち、従来は感光体の除電にフィラメント２から
の直接光を利用せず、反射鏡４からの反射光、つまり間
接光を利用していた。2. Description of the Related Art Conventionally, this type of slit exposure illumination apparatus has had a configuration as shown in FIG. In Fig. 4, 1 is a linear light source, 2
is a filament, which alternately forms light-emitting parts and non-light-emitting parts. 3 is a tube-shaped bulb, 4 is a reflector, and 5 is a slit hole, which is provided in the reflector 4 along the tube axis direction and consists of one elongated hole. The light leaking from the slit hole 5 due to a slight diffuse reflection component of the light is guided to the surface of a photoreceptor drum (not shown) and used to eliminate static from the photoreceptor. That is, conventionally, the direct light from the filament 2 was not used to neutralize the photoreceptor, but the reflected light from the reflecting mirror 4, that is, indirect light was used.
発明が解決しようとする問題点
ところが、このよう々従来の構成では、原稿と反射鏡４
との間で光の相互反射が起こるが、そのとき原稿面の反
射率によって光の相互反射量が異なるために、スリット
孔５から漏れる光の量が原稿面の反射率によって変動す
る。その結果、感光体の除電のために、感光体に到達す
る光量（以下、イレーザ光量という）が変動するという
問題が生じていた。Problems to be Solved by the Invention However, in this conventional configuration, the document and the reflecting mirror 4
Mutual reflection of light occurs between the slits 5 and 5, but since the amount of mutual reflection of light differs depending on the reflectance of the document surface, the amount of light leaking from the slit hole 5 varies depending on the reflectance of the document surface. As a result, a problem has arisen in that the amount of light that reaches the photoreceptor (hereinafter referred to as the amount of eraser light) fluctuates due to charge removal from the photoreceptor.
また、かかる構成では、前述のとおり、感光体の除電に
光源からの間接光を利用するという原理を採用している
ので、適正なイレーザ光量を得るにはスリット孔６の開
口面積を太きくしなければならず、そのため光源１から
の直接光がスリット孔５から同時に漏れやすくなる。そ
の結果、原稿面を照明する光量がそれだけ減少するとい
う問題も生じていた。Furthermore, as described above, this configuration employs the principle of using indirect light from a light source to eliminate static from the photoreceptor, so the opening area of the slit hole 6 must be made large in order to obtain an appropriate amount of eraser light. Therefore, the direct light from the light source 1 tends to leak from the slit hole 5 at the same time. As a result, a problem has also arisen in that the amount of light illuminating the surface of the document is correspondingly reduced.
本発明はこのような問題を解決するためになされたもの
であり、原稿面の反射率の違いによる影響を受けること
なく安定したイレーザ光量を得ることができ、まだ原稿
面に対し効率よく照明することのできるスリット露光照
明装置を提供するものである。The present invention was made to solve these problems, and it is possible to obtain a stable amount of eraser light without being affected by differences in reflectance of the document surface, and still efficiently illuminate the document surface. The present invention provides a slit exposure illumination device that can be used.
問題点を解決するための手段
この問題を解決するために、本発明は管形バルブの中に
発光部と非発光部とを交互に形成したフィラメントを有
する線状光源と、前記光源に沿って設けられたとい状の
反射鏡が露光面の照度を所定の分布にするように配置さ
れたスリット露光照明装置であって、前記フィラメント
の非発光部と相対向し、かつ前記光源からの光が感光体
に直接導かれる前記反射鏡の個所に、前記光源の管軸方
向に沿って不連続にスリット状の開口部を設け、前記開
口部から洩れる光を感光体の除電に利用したものである
。Means for Solving the Problem In order to solve this problem, the present invention provides a linear light source having a filament in which light-emitting parts and non-light-emitting parts are alternately formed in a tubular bulb, and A slit exposure illumination device in which a trough-shaped reflecting mirror is arranged so as to give a predetermined distribution of illuminance on an exposure surface, and the slit-shaped reflecting mirror faces the non-light-emitting part of the filament, and the light from the light source is exposed to light. Slit-shaped openings are provided discontinuously along the tube axis direction of the light source at the portion of the reflecting mirror that is directly guided to the body, and the light leaking from the openings is used to eliminate static from the photoreceptor.
作 用
このような構成によると、感光体の除電に光源からの直
接光を利用しているために、反射鏡と原稿との間の相互
反射光がスリット状開口部から漏れても、この間接光は
直接光に比べて輝度レベルがきわめて小さいので、無視
し得るものとなる。Function: According to this configuration, since direct light from the light source is used to remove static electricity from the photoreceptor, even if the mutually reflected light between the reflector and the document leaks from the slit-shaped opening, this indirect light will be removed. The brightness level of the light is so small compared to direct light that it can be ignored.
したがって、原稿面の反射率によってイレーザ光量が変
動することがなくなる。また、直接光を利用しているた
めに、同一のイレーザ光量を得るのに従来に比べてスリ
ット状開口部の全開口面積が小さくてすむ。このことと
、フィラメントの非発光部と相対向する反射鏡の個所に
、光源の管軸方不ＪＬ椛
向に沿って←＝Ｈ４にスリット状開口部を設けているこ
とから、この開口部から必要以上に光が漏れることがな
くなり、そのため原稿面を照明する光量は十分なものと
なり、原稿面を効率よく照明することができる。Therefore, the amount of eraser light does not vary depending on the reflectance of the document surface. Furthermore, since direct light is used, the total opening area of the slit-shaped openings can be smaller than in the past to obtain the same amount of eraser light. In addition to this, since a slit-shaped opening is provided at the part of the reflecting mirror that faces the non-light-emitting part of the filament at ←=H4 along the tube axis direction of the light source, it is possible to No more light leaks than necessary, so the amount of light that illuminates the document surface is sufficient, and the document surface can be efficiently illuminated.
実施例
第１図は本発明の一実施例であるスリット露光照明装置
の斜視図である。第１図において、１は線状光源で、光
を拡散するための拡散処理が施された管形バルブ３の中
に５個の発光セグメントからなる発光部６と非発光部７
とを交互に形成したフィラメント２を有している。８は
とい状の反射鏡である。９はスリット状の開口部で、フ
ィラメント２の非発光部７と相対向し、かつ光源１から
の光が感光体ドラム１ｏに直接導かれる反射鏡８の個所
に、光源１の管軸方向に沿って不連続に計４個設けられ
ている。１個の開口部９の大きさは、幅が約２〜３個、
長さが約５〜１０ｍｍである。そして、管形バルブ３で
拡散された光源１からの直接光を一関口部９を通して感
光体ドラム１０に導き、感光体の除電のだめのイレーザ
に利用している。Embodiment FIG. 1 is a perspective view of a slit exposure illumination device which is an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a linear light source, and a light-emitting part 6 and a non-light-emitting part 7 each consisting of five light-emitting segments are placed inside a tube-shaped bulb 3 that has been subjected to a diffusion process to diffuse light.
It has filaments 2 formed alternately. 8 is a trough-shaped reflecting mirror. Reference numeral 9 denotes a slit-shaped opening, which is placed in the tube axis direction of the light source 1 at a portion of the reflecting mirror 8 that faces the non-light-emitting portion 7 of the filament 2 and directs the light from the light source 1 to the photoreceptor drum 1o. A total of four pieces are provided discontinuously along the line. The size of one opening 9 is approximately 2 to 3 in width,
The length is about 5-10 mm. The direct light from the light source 1, which has been diffused by the tube-shaped bulb 3, is guided to the photosensitive drum 10 through the opening 9, and is used as an eraser for removing static from the photosensitive member.
第２図は反射鏡および光源の拡大側断面図を示している
。FIG. 2 shows an enlarged side sectional view of the reflector and light source.
以上のように、このスリット露光照明装置によれば、反
射鏡８と原稿との間の相互反射による開口部９から漏れ
る間接光は前記直接光に比べて輝度レベルがきわめて小
さく無視し得るので、原稿面の反射率に影響されること
なく安定したイレーザ光景が得られる。また、感光体の
除電に直接光を利用しているために、同一のイレーザ光
量を得るのに従来に比べてスリット状開口部９の全開口
面積が小さくてすむ。このことと、フィラメント２の非
発光部７と相対向し、かつ光源１からの光が感光体ドラ
ム１ｏに直接導かれる反射鏡８の個所に、光源１の管軸
方向に沿って不連続にスリット状の開口部９を設けてい
ることから、開口部９から漏れる光が必要以上に多くな
ることが防がれ、それだけ原稿面を照明する光量が増加
して、原稿面を効率よく照明することができる。実験に
よれば、同一ワット数、同一構造の線状光源を用い、同
一形状、同一外形寸法を有し、開口部の大きさ。As described above, according to this slit exposure illumination device, the indirect light leaking from the aperture 9 due to mutual reflection between the reflecting mirror 8 and the document has a brightness level that is extremely small compared to the direct light and can be ignored. A stable eraser scene can be obtained without being affected by the reflectance of the original surface. Furthermore, since direct light is used to eliminate static electricity from the photoreceptor, the total opening area of the slit-shaped opening 9 can be smaller than that of the prior art in order to obtain the same amount of eraser light. In addition to this, the reflection mirror 8, which faces the non-light emitting part 7 of the filament 2 and where the light from the light source 1 is guided directly to the photoreceptor drum 1o, is discontinuously disposed along the tube axis direction of the light source 1. Since the slit-shaped opening 9 is provided, the amount of light leaking from the opening 9 is prevented from increasing more than necessary, and the amount of light that illuminates the document surface increases accordingly, thereby efficiently illuminating the document surface. be able to. According to experiments, linear light sources of the same wattage and structure were used, and had the same shape, external dimensions, and aperture size.
位置、構成を異にした反射鏡を用いた場合、本発明実施
例の装置は第４図に示す従来構造の装置に比べて原稿面
の照度が約１０チ向上することが認められた。また、こ
のような構成を有する装置における長手方向の照度分布
について実験で調べだところ、各々のスリット状開口部
９から漏れる光の配光は、第３図に破線で示すように直
下方向より斜め方向に多く光が出ており、その結果長手
方向に対して均一な照度分布が得られることが確認され
た。When using reflecting mirrors with different positions and configurations, it was found that the apparatus according to the embodiment of the present invention improved the illuminance on the document surface by about 10 degrees compared to the apparatus with the conventional structure shown in FIG. In addition, when we investigated the illumination distribution in the longitudinal direction of a device having such a configuration through experiments, we found that the distribution of light leaking from each slit-shaped opening 9 was diagonal from the direction directly below, as shown by the broken line in Fig. 3. It was confirmed that a lot of light was emitted in the direction, and as a result, a uniform illuminance distribution was obtained in the longitudinal direction.
発明の詳細
な説明したように、本発明によれば、原稿面の反射率の
影響を受けることなく安定したイレーサ光量が得られ、
また効率よく原稿面を照明することができるスリット露
光照明装置を提供することができるものである。As described in detail, according to the present invention, a stable amount of eraser light can be obtained without being affected by the reflectance of the document surface.
Furthermore, it is possible to provide a slit exposure illumination device that can efficiently illuminate the surface of a document.
第１図は本発明の一実施例であるスリット露光照明装置
の斜視図、第２図は反射鏡と光源との拡大側断面図、第
３図は同装置における長手方向の照度分布を説明するだ
めの図、第４図は従来のスリット露光照明装置の一例を
示す側断面図である。
１・・・・・・光源、２・・・・・・フィラメント、３
・・・・・管形バルブ、６・・・・・・発光部、７・・
・・・−非発光部、８・・・・・・反射鏡、９・・・・
・・開口部、１０・・・・・・感光体ドラム。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名／
−一一光課
２−− フィラメント
３−管形バルブ゛
６−発光部
７− Ａ発光部
８−反射鏡
第 ２ｒ！！ｌFig. 1 is a perspective view of a slit exposure illumination device that is an embodiment of the present invention, Fig. 2 is an enlarged side cross-sectional view of a reflecting mirror and a light source, and Fig. 3 explains the illuminance distribution in the longitudinal direction in the same device. The bottom diagram, FIG. 4, is a side sectional view showing an example of a conventional slit exposure illumination device. 1... Light source, 2... Filament, 3
...Tubular bulb, 6...Light emitting part, 7...
...-Non-light emitting part, 8...Reflector, 9...
...Aperture, 10...Photosensitive drum. Name of agent: Patent attorney Toshio Nakao and 1 other person/
-11 Optical Section 2-- Filament 3-Tube bulb 6-Light emitting section 7-A Light emitting section 8-Reflector No. 2r! ! l
Claims (1)
フィラメントを有する線状光源と、前記光源に沿って設
けられたとい状の反射鏡が露光面の照度を所定の分布に
するように配置されたスリット露光照明装置であって、
前記フィラメントの非発光部と相対向し、かつ前記光源
からの光が感光体に直接導かれる前記反射鏡の個所に、
前記光源の管軸方向に沿って不連続にスリット状の開口
部を設け、前記開口部から漏れる光を感光体の除電に利
用したことを特徴とするスリット露光照明装置。A linear light source having a filament in which light-emitting parts and non-light-emitting parts are alternately formed in a tube-shaped bulb, and a trough-shaped reflecting mirror installed along the light source, distribute the illuminance on the exposed surface to a predetermined distribution. A slit exposure illumination device arranged in
a portion of the reflecting mirror that faces the non-light-emitting portion of the filament and where light from the light source is directly guided to the photoreceptor;
A slit exposure illumination device, characterized in that slit-shaped openings are provided discontinuously along the tube axis direction of the light source, and light leaking from the openings is used to eliminate static from a photoreceptor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60024812A JPH06100870B2 (en) | 1985-02-12 | 1985-02-12 | Slit exposure illuminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60024812A JPH06100870B2 (en) | 1985-02-12 | 1985-02-12 | Slit exposure illuminator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61184583A true JPS61184583A (en) | 1986-08-18 |
| JPH06100870B2 JPH06100870B2 (en) | 1994-12-12 |
Family
ID=12148601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60024812A Expired - Lifetime JPH06100870B2 (en) | 1985-02-12 | 1985-02-12 | Slit exposure illuminator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06100870B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2642190A1 (en) * | 1989-01-20 | 1990-07-27 | Toshiba Kk | IMAGE FORMING APPARATUS, IN PARTICULAR FOR COPIER |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5070819U (en) * | 1973-10-30 | 1975-06-23 | ||
| JPS53104640U (en) * | 1977-01-27 | 1978-08-23 | ||
| JPS56102557U (en) * | 1979-12-28 | 1981-08-11 | ||
| JPS56125769A (en) * | 1980-03-05 | 1981-10-02 | Ricoh Co Ltd | Original lighting device in copying machine |
| JPS5728443U (en) * | 1980-07-22 | 1982-02-15 | ||
| JPS5826045U (en) * | 1981-08-13 | 1983-02-19 | コピア株式会社 | Optical static eliminator for electrostatic copying machines |
-
1985
- 1985-02-12 JP JP60024812A patent/JPH06100870B2/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5070819U (en) * | 1973-10-30 | 1975-06-23 | ||
| JPS53104640U (en) * | 1977-01-27 | 1978-08-23 | ||
| JPS56102557U (en) * | 1979-12-28 | 1981-08-11 | ||
| JPS56125769A (en) * | 1980-03-05 | 1981-10-02 | Ricoh Co Ltd | Original lighting device in copying machine |
| JPS5728443U (en) * | 1980-07-22 | 1982-02-15 | ||
| JPS5826045U (en) * | 1981-08-13 | 1983-02-19 | コピア株式会社 | Optical static eliminator for electrostatic copying machines |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2642190A1 (en) * | 1989-01-20 | 1990-07-27 | Toshiba Kk | IMAGE FORMING APPARATUS, IN PARTICULAR FOR COPIER |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06100870B2 (en) | 1994-12-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |