JPH0453646Y2 - - Google Patents
Info
- Publication number
- JPH0453646Y2 JPH0453646Y2 JP1985157953U JP15795385U JPH0453646Y2 JP H0453646 Y2 JPH0453646 Y2 JP H0453646Y2 JP 1985157953 U JP1985157953 U JP 1985157953U JP 15795385 U JP15795385 U JP 15795385U JP H0453646 Y2 JPH0453646 Y2 JP H0453646Y2
- Authority
- JP
- Japan
- Prior art keywords
- reflecting mirror
- document table
- exposure
- document
- scanning device
- 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
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000003746 surface roughness Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Optical Elements Other Than Lenses (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
【考案の詳細な説明】
(イ) 産業上の利用分野
本考案は、電子複写機や文書フアイル装置に使
用され得る露光走査装置に関するものである。[Detailed description of the invention] (a) Industrial application field The present invention relates to an exposure scanning device that can be used in electronic copying machines and document file devices.
(ロ) 従来の技術
従来の露光走査装置は、例えば第２図に示す構
造になつている。先ず、この図に基き従来の露光
走査装置について説明すると、１は透明なガラス
板にて形成されている原稿台で、左右方向に移動
し得るように構成されている。前記原稿台１の下
方には、断面が楕円形の第１反射鏡２とこれに一
体的に形成されている第２反射鏡３からなるラン
プホルダ４が設けられており、前記第１反射鏡２
の下方の焦点位置に棒状の露光ランプ５が固設さ
れている。前記ランプホルダ４はアルミニウム合
金の押出型材にて形成されており、少なくとも前
記第１反射鏡２と第２反射鏡３に対応する部分
が、鏡面仕上げ（表面あらさが1S程度）になる
ように構成されている。(b) Prior Art A conventional exposure scanning device has a structure shown in FIG. 2, for example. First, a conventional exposure scanning device will be explained based on this figure. Reference numeral 1 denotes a document table made of a transparent glass plate, and is configured to be movable in the left and right directions. A lamp holder 4 is provided below the document table 1, and includes a first reflecting mirror 2 having an elliptical cross section and a second reflecting mirror 3 integrally formed therewith. 2
A rod-shaped exposure lamp 5 is fixedly installed at a lower focal point. The lamp holder 4 is made of an extruded aluminum alloy material, and is configured so that at least the portions corresponding to the first reflecting mirror 2 and the second reflecting mirror 3 have a mirror finish (surface roughness is approximately 1S). has been done.
ところが、押出型材を使用する場合、鏡面仕上
にも限度があり、必然的に露光ランプ５から直接
照射される光線５ａの方が、第２反射鏡３からの
反射光線５ｂよりも強力となる。そうすると、原
稿台１上の原稿６の厚さに対応する影（黒塗部
分）が、原稿台カバー７の下面に形成され、この
影が黒いラインとして複写紙若しくは記録紙上に
形成される。 However, when using an extruded material, there is a limit to the mirror finish, and the light ray 5a directly irradiated from the exposure lamp 5 is inevitably stronger than the reflected light ray 5b from the second reflecting mirror 3. Then, a shadow (black portion) corresponding to the thickness of the document 6 on the document table 1 is formed on the lower surface of the document table cover 7, and this shadow is formed as a black line on the copy paper or recording paper.
具体的には、露光ランプ５の中心から直線的に
照射された光線５ａと原稿台１の下面とのなす角
度αが40°程度である場合、原稿６の厚さが0.15
mm以上になると前記影が形成される。 Specifically, when the angle α between the light ray 5a linearly emitted from the center of the exposure lamp 5 and the lower surface of the document table 1 is about 40 degrees, the thickness of the document 6 is 0.15 degrees.
When the thickness exceeds mm, the shadow is formed.
そこで、前記のような影ができることを防止す
るため、種々の手段が考案されている（実開昭56
−172854号、実開昭57−43460号公報参照）。しか
しながら前記従来装置のような構成のものでは、
問題の影を完全に消去することは困難であつた。 Therefore, various methods have been devised to prevent the formation of shadows as described above (as in 1983).
-172854, Utility Model Application Publication No. 57-43460). However, with a configuration like the conventional device described above,
It was difficult to completely eliminate the shadow of the problem.
(ハ) 考案が解決しようとする問題点
前述のように従来の技術では、複写紙等に、原
稿の厚さに比例する幅の影が、原稿像の側縁部に
沿つて黒々と形成され、大変見苦しかつた。(c) Problems to be solved by the invention As mentioned above, in the conventional technology, a dark shadow with a width proportional to the thickness of the original is formed on copy paper along the side edges of the original image. , it was very unsightly.
本考案は斯る従来の技術の帯有する問題点に鑑
みてなされたもので、第２反射鏡の反射率を高く
することによつて、原稿に対する左右からの光線
を強度をバランスさせんとするものである。 The present invention was devised in view of the problems inherent in the conventional technology, and attempts to balance the intensity of the light rays from the left and right sides of the document by increasing the reflectance of the second reflecting mirror. It is something.
(ニ) 問題点を解決するための手段
本発明は、原稿台の下方に位置し、原稿台と相
対的に移動して原稿面を露光走査するための、原
稿台の下面に対して非直角方向から光線を照射す
る露光ランプと、この露光ランプの非露光領域を
囲繞する第１反射鏡と、前記原稿台の下方に位置
し、前記露光ランプから照射された光線の一部を
反射して、この反射光線を前記第１反射鏡からの
反射光と反対方向から原稿台の下面に照射するた
めの第２反射鏡とが具備されている露光走査装置
において、前記第１反射鏡は金属製の押出型材に
て形成され、前記第２反射鏡は前記第１反射鏡と
一体的に形成されているホルダに装着されてお
り、前記第１反射鏡側の光線強度と前記第２反射
鏡側の光線強度とをほぼ等しくすべく、第２反射
鏡の反射率は第１反射鏡の反射率よりも高いこと
を特徴とする露光走査装置である。(d) Means for Solving the Problems The present invention provides a non-perpendicular to the lower surface of the document table, which is located below the document table and moves relative to the document table to expose and scan the document surface. an exposure lamp that emits light from a direction; a first reflecting mirror that surrounds a non-exposed area of the exposure lamp; and a second reflecting mirror for irradiating the reflected light beam onto the lower surface of the document table from a direction opposite to the reflected light from the first reflecting mirror, the first reflecting mirror is made of metal. The second reflecting mirror is mounted on a holder integrally formed with the first reflecting mirror, and the light intensity on the first reflecting mirror side and the light intensity on the second reflecting mirror side are different from each other. The exposure scanning device is characterized in that the reflectance of the second reflecting mirror is higher than that of the first reflecting mirror so that the light intensity of the second reflecting mirror is approximately equal to the intensity of the light beam.
(ホ) 作用
本考案では、第２反射鏡の反射率が、第１反射
鏡の反射率よりも高くされているので、露光ラン
プから直線的に照射される光線によつて形成され
る影の部分にも、第２反射鏡からの強力な反射光
線が照射される。従つて、原稿の厚さに対応する
影は形成されない。(E) Effect In this invention, the reflectance of the second reflecting mirror is made higher than that of the first reflecting mirror, so that the shadow formed by the light rays emitted linearly from the exposure lamp is reduced. The area is also irradiated with a strong reflected beam from the second reflecting mirror. Therefore, no shadow corresponding to the thickness of the document is formed.
(ヘ) 実施例
第１図は本考案の一実施例を示す断面図であ
る。この図において、従来装置と同一部分には同
一の符号を付し再度の説明は略す。(F) Embodiment FIG. 1 is a sectional view showing an embodiment of the present invention. In this figure, the same parts as in the conventional device are given the same reference numerals, and repeated explanations will be omitted.
第１反射鏡２と一体的に形成されているホルダ
３（従来装置では第２反射鏡に対応する部分）
に、超仕上げが施された第２反射鏡８が固着され
ている。具体的には、第１反射鏡２の表面あらさ
が1S程度であるのに対し、第２反射鏡８の表面
あらさは0.1S程度である。 Holder 3 integrally formed with the first reflecting mirror 2 (corresponding to the second reflecting mirror in the conventional device)
A second reflecting mirror 8 which has been given a super finish is fixed to it. Specifically, the surface roughness of the first reflecting mirror 2 is about 1S, while the surface roughness of the second reflecting mirror 8 is about 0.1S.
前記第２反射鏡８は、原稿台１の下面に対して
実質的に直交する鏡面８ａと、一定の角度β（具
体的には約60℃）を有する鏡面８ｂとからなつて
いる。 The second reflecting mirror 8 is composed of a mirror surface 8a that is substantially orthogonal to the lower surface of the document table 1, and a mirror surface 8b that has a certain angle .beta. (specifically, about 60.degree. C.).
９は、露光ランプ５から直接照射される光線の
露光量を制御する制御板である。 Reference numeral 9 denotes a control plate that controls the exposure amount of the light beam directly irradiated from the exposure lamp 5.
第３図は第２反射鏡８の他の実施例を示す斜視
図である。この実施例では、第２反射鏡８はその
延在方向と同方向に沿つて複数の反射面８ｃ……
に分割されている。このように分割して、夫々の
反射面８ｃ……の折曲角度を変えることによつ
て、第２反射鏡８の延在方向に沿つて生じる輝度
のバラツキを補正することができる。 FIG. 3 is a perspective view showing another embodiment of the second reflecting mirror 8. FIG. In this embodiment, the second reflecting mirror 8 has a plurality of reflecting surfaces 8c... along the same direction as its extending direction.
It is divided into By dividing it in this way and changing the bending angle of each reflecting surface 8c, it is possible to correct variations in brightness that occur along the extending direction of the second reflecting mirror 8.
なお、本実施例では原稿台１が移動する型式も
のであるが、本考案を原稿台１が固定で露光ラン
プ５等が移動する型式のものにも適用できること
はいうまでもない。 Although the present embodiment uses a type in which the document table 1 moves, it goes without saying that the present invention can also be applied to a type in which the document table 1 is fixed and the exposure lamp 5 and the like move.
(ト) 考案の効果
本考案では、第２反射鏡の反射率が第１反射鏡
の反射率よりも高くされているので、露光ランプ
から直線的に照射される光線によつて形成される
影の部分にも、第２反射鏡からの強力な反射光線
が照射される。(g) Effects of the invention In this invention, the reflectance of the second reflecting mirror is higher than that of the first reflecting mirror, so that the shadow formed by the light rays emitted linearly from the exposure lamp is reduced. A strong reflected light beam from the second reflecting mirror is also irradiated to this area.
従つて、原稿の厚さがある程度厚くても、その
側縁部に影が形成されず、複写紙や記録紙に黒い
帯状のラインが形成されることはない。 Therefore, even if the document is thick to some extent, no shadows are formed on the side edges of the document, and no black band-like lines are formed on copy paper or recording paper.
また、従来装置に、反射率の高い第２反射鏡を
装着するだけであるので、あまりコストアツプを
招くこともない。 Further, since the conventional device is simply equipped with a second reflecting mirror having a high reflectance, the cost does not increase much.
第１図は本考案の一実施例を示す断面図、第２
図は従来装置を示す断面図、第３図は本考案の他
の実施例の要部を示す斜視図である。
１……原稿台、２……第１反射鏡、４……ラン
プホルダ、５……露光ランプ、６……原稿、８…
…第２反射鏡。
Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view showing a conventional device, and FIG. 3 is a perspective view showing the main parts of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Original table, 2... First reflecting mirror, 4... Lamp holder, 5... Exposure lamp, 6... Original, 8...
...Second reflector.
Claims (1)
して原稿面を露光走査するための、原稿台の下面
に対して非直角方向から光線を照射する露光ラン
プと、この露光ランプの非露光領域を囲繞する第
１反射鏡と、前記原稿台の下方に位置し、前記露
光ランプから照射された光線の一部を反射して、
この反射光線を前記第１反射鏡からの反射光と反
対方向から原稿台の下面に照射するための第２反
射鏡とが具備されている露光走査装置において、 前記第１反射鏡は金属製の押出型材にて形成さ
れ、前記第２反射鏡は前記第１反射鏡と一体的に
形成されているホルダに装着されており、前記第
１反射鏡側の光線強度と前記第２反射鏡側の光線
強度とをほぼ等しくすべく、第２反射鏡の反射率
は第１反射鏡の反射率よりも高いことを特徴とす
る露光走査装置。[Scope of Claim for Utility Model Registration] Exposure that is located below the document table and irradiates a light beam from a non-perpendicular direction to the bottom surface of the document table to expose and scan the document surface by moving relative to the document table. a lamp, a first reflecting mirror surrounding a non-exposed area of the exposure lamp, and a first reflecting mirror located below the document table, reflecting a part of the light rays emitted from the exposure lamp;
In the exposure scanning device, the exposure scanning device is equipped with a second reflecting mirror for irradiating the reflected light beam onto the lower surface of the document table from a direction opposite to the reflected light from the first reflecting mirror, wherein the first reflecting mirror is made of metal. The second reflecting mirror is formed of an extruded material and is attached to a holder that is integrally formed with the first reflecting mirror, and the light intensity on the first reflecting mirror side and the light intensity on the second reflecting mirror side are different from each other. An exposure scanning device characterized in that the reflectance of the second reflecting mirror is higher than the reflectance of the first reflecting mirror in order to make the intensity of the light beam substantially equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985157953U JPH0453646Y2 (en) | 1985-10-16 | 1985-10-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985157953U JPH0453646Y2 (en) | 1985-10-16 | 1985-10-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6265649U JPS6265649U (en) | 1987-04-23 |
| JPH0453646Y2 true JPH0453646Y2 (en) | 1992-12-16 |
Family
ID=31080981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985157953U Expired JPH0453646Y2 (en) | 1985-10-16 | 1985-10-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0453646Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4809043A (en) * | 1986-04-30 | 1989-02-28 | Mita Industrial Co., Ltd. | Document scanning optical device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6017701A (en) * | 1983-07-11 | 1985-01-29 | Toshiba Corp | Optical device |
-
1985
- 1985-10-16 JP JP1985157953U patent/JPH0453646Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6017701A (en) * | 1983-07-11 | 1985-01-29 | Toshiba Corp | Optical device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6265649U (en) | 1987-04-23 |
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