JP2730443B2 - Light beam scanning device - Google Patents

Light beam scanning device

Info

Publication number
JP2730443B2
JP2730443B2 JP5034793A JP5034793A JP2730443B2 JP 2730443 B2 JP2730443 B2 JP 2730443B2 JP 5034793 A JP5034793 A JP 5034793A JP 5034793 A JP5034793 A JP 5034793A JP 2730443 B2 JP2730443 B2 JP 2730443B2
Authority
JP
Japan
Prior art keywords
light beam
optical system
lens
incident
polygon mirror
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 - Lifetime
Application number
JP5034793A
Other languages
Japanese (ja)
Other versions
JPH06265806A (en
Inventor
荘司 大庭
宏憲 中島
学 北島
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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
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Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP5034793A priority Critical patent/JP2730443B2/en
Priority claimed from US08/207,690 external-priority patent/US5652611A/en
Publication of JPH06265806A publication Critical patent/JPH06265806A/en
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Publication of JP2730443B2 publication Critical patent/JP2730443B2/en
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Links

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、電子写真方式にて画像
を形成する複写機、ファクシミリおよびレーザビームプ
リンタ等の画像形成装置に利用される光ビーム走査装置
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light beam scanning apparatus used in an image forming apparatus such as a copying machine, a facsimile, and a laser beam printer for forming an image by an electrophotographic system.

【0002】[0002]

【従来の技術】電子写真方式での光ビーム走査装置とし
て例えば特開昭62−30214号公報がある。この光
ビーム走査装置において,装置全体の平面的な大きさを
抑えるためポリゴンミラーへの入射光路とポリゴンミラ
ーからの反射光路とが側方より見てある角度をなして配
置されておりポリゴンミラーへの入射側の光学系が反射
側の光路ないし光学系と干渉しないよう重ねて配置され
ている。また、光学系上での不等速性をできるだけ単純
化しておくため光ビームをポリゴンミラーに対し走査域
の中央正面から入射させてある。更に、全体の大きさを
抑えるため偏向手段にある角度をもって光ビームを入射
させる入射光学系において光源からの光ビームをレンズ
部材でもって屈折させて入射させている。
2. Description of the Related Art Japanese Patent Application Laid-Open No. Sho 62-30214 discloses a light beam scanning apparatus in an electrophotographic system. In this light beam scanning device, the incident light path to the polygon mirror and the reflected light path from the polygon mirror are arranged at an angle when viewed from the side in order to reduce the planar size of the entire device. Are arranged so as not to interfere with the optical path or optical system on the reflection side. Further, in order to simplify the unequal velocity on the optical system as much as possible, a light beam is made incident on the polygon mirror from the front of the center of the scanning area. Further, in order to suppress the overall size, in the incident optical system in which the light beam is incident on the deflection means at a certain angle, the light beam from the light source is refracted by the lens member and is incident.

【0003】[0003]

【発明が解決しようとする課題】しかしながら上記の構
成においては、光ビームを屈折させて前記入射条件を満
足するには口径の大きなレンズの外側部分に光ビームを
通す必要があり入射光学系の大型化あるいはレンズの必
要な部分のみ切り欠いて使用するにしてもレンズの加工
に多大な手間がかかり高価につながる問題点を有してい
た。
However, in the above configuration, in order to refract the light beam and satisfy the above-mentioned incident condition, it is necessary to pass the light beam through the outer portion of the lens having a large aperture. However, even if only a necessary part of the lens is cut out and used, there is a problem that a great deal of labor is required for processing the lens, resulting in high cost.

【0004】また、入射光学系での上記レンズによる光
路変更はレンズ自体の加工精度に依るところが多くポリ
ゴンミラーへの入射位置など変動する要因があり結像特
性が悪化するきらいがあり、更に温度などの変化によっ
てもレンズの屈折率が変わり光路の変動が生じる問題点
を有していた。
In addition, the change of the optical path by the lens in the incident optical system largely depends on the processing accuracy of the lens itself, and there are factors that vary such as the position of incidence on the polygon mirror. There is a problem that the refractive index of the lens also changes due to the change in the optical path, and the optical path fluctuates.

【0005】本発明は、入射光学系を構成するレンズ部
材を単レンズ化して偏向手段に所定の角度をもって光ビ
ームを直接入射させることにより光学系の大型化をはか
ることなく従来の問題を解消することができる光ビーム
走査装置を提供することを目的としている。
The present invention solves the conventional problems without increasing the size of the optical system by forming the lens member constituting the incident optical system into a single lens and directly entering the light beam at a predetermined angle into the deflecting means. It is an object of the present invention to provide a light beam scanning device capable of performing the above.

【0006】[0006]

【課題を解決するための手段】この目的を達成するため
に本発明の光ビーム走査装置は、偏平な光ビームを発す
る光源と、前記光ビームを整形収束させる第一結像光学
系と、光源からの光ビームを反射して偏向走査する偏向
手段と、前記偏向走査面上にあり偏向された光ビームを
感光ドラム面に結像させる第二結像光学系とを備えた光
ビーム走査装置であって、前記第一結像光学系は単レン
ズから構成され偏向手段に対し入射光軸方向を走査平面
に対し所定の角度で入射し走査平面から見て第二結像光
学系の光軸方向と重なる構成を有している。
To achieve this object, a light beam scanning apparatus according to the present invention comprises a light source for emitting a flat light beam, a first imaging optical system for shaping and converging the light beam, and a light source. A light beam scanning device comprising: a deflecting unit that reflects and deflects and scans a light beam from the light source, and a second imaging optical system that forms an image of the deflected light beam on the deflection scanning surface on the photosensitive drum surface. The first imaging optical system is constituted by a single lens, and the incident optical axis direction is incident on the deflecting means at a predetermined angle with respect to the scanning plane, and the optical axis direction of the second imaging optical system is viewed from the scanning plane. And a configuration that overlaps with

【0007】[0007]

【作用】この構成によって単レンズの光軸上を光源から
の光ビームを通過させ偏向手段の反射面に入射すること
により光ビームの光軸を偏向手段の反射点まで光路変更
なしで構成することができ第一結像光学系の大型化をは
かることなく偏向手段からレンズ面の範囲を十分に取る
ことができる。更に走査平面上での第二結像光学系の光
軸と第一結像光学系の入射光軸を走査平面上より見て一
致させることによりこの走査装置の光学系が上記入射光
軸に対して対称となる。
With this structure, the light beam from the light source passes through the optical axis of the single lens and enters the reflecting surface of the deflecting means so that the optical axis of the light beam can be formed without changing the optical path to the reflection point of the deflecting means. Thus, a sufficient range of the lens surface from the deflecting means can be obtained without increasing the size of the first imaging optical system. Further, by making the optical axis of the second imaging optical system on the scanning plane coincide with the incident optical axis of the first imaging optical system as viewed from the scanning plane, the optical system of this scanning device is aligned with the incident optical axis. And symmetric.

【0008】[0008]

【実施例】以下本発明の一実施例について,図面を参照
しながら説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

【0009】図1,図2において、1は本体フレームで
高精度な樹脂成形品より構成されている。本体フレーム
1の端部には偏向手段であるポリゴンミラー2が配され
高速回転する駆動モータ3の回転軸4に対し直角方向に
高精度に取りつけられている。
In FIGS. 1 and 2, reference numeral 1 denotes a main body frame which is formed of a high-precision resin molded product. A polygon mirror 2 serving as a deflecting means is arranged at an end of the main body frame 1 and is attached with high precision in a direction perpendicular to a rotation shaft 4 of a drive motor 3 which rotates at high speed.

【0010】上記ポリゴンミラー2の反射面は回転方向
に沿って円筒面形状をなしており反射面とレンズ効果を
有する。
The reflecting surface of the polygon mirror 2 has a cylindrical shape along the rotating direction, and has a lens effect with the reflecting surface.

【0011】本体フレーム1中央部付近には第一結像光
学系である単レンズ5がレンズ保持部材6に保持されて
固定されており,レンズ保持部材6の端面には光源であ
る半導体レーザ7を圧入したレーザ保持部材8が取りつ
けられ,他の端面には単レンズ5からの出射光の開口を
制御するための細長いスリット10を有するアパーチャ
9が取りつけられている。上記半導体レーザ7は横断面
形状が楕円状の発散光を出射しており単レンズ5により
ビーム整形および収束される。
A single lens 5 serving as a first imaging optical system is held and fixed by a lens holding member 6 near the center of the main body frame 1, and a semiconductor laser 7 serving as a light source is provided on an end surface of the lens holding member 6. The laser holding member 8 is press-fitted, and an aperture 9 having an elongated slit 10 for controlling the opening of the light emitted from the single lens 5 is mounted on the other end surface. The semiconductor laser 7 emits divergent light having an elliptical cross section, and the beam is shaped and converged by the single lens 5.

【0012】図3は上記単レンズ5の形状を示したもの
で、ここで上記ポリゴンミラー2の回転方向を主走査方
向それと直角方向を副走査方向とする。
FIG. 3 shows the shape of the single lens 5, where the rotation direction of the polygon mirror 2 is the main scanning direction and the direction perpendicular to the main scanning direction is the sub-scanning direction.

【0013】図3において単レンズ5の第一面11,第
二面12とも主走査方向および副走査方向において曲率
半径が異なるアナモフィック形状をなしており半導体レ
ーザ7の楕円状の長径方向を主走査方向に短径方向を副
走査方向に合わせて単レンズ5の光軸に調整される。ま
たアパーチャ9のスリットも長手方向を主走査方向に合
わせて固定されており、単レンズ5の出射光軸が上記ポ
リゴンミラー2面上に入射角Aでもって入射されかつモ
ータ回転軸4中心に向かうようレンズ保持部材6が位置
決めされている。ここで上記単レンズ5は形状が複雑で
あるためガラス材料を直接成形して構成される。
In FIG. 3, both the first surface 11 and the second surface 12 of the single lens 5 have an anamorphic shape having different radii of curvature in the main scanning direction and the sub-scanning direction. The minor axis direction is adjusted to the optical axis of the single lens 5 in the sub-scanning direction. The slit of the aperture 9 is also fixed so that its longitudinal direction is aligned with the main scanning direction, and the output optical axis of the single lens 5 is incident on the surface of the polygon mirror 2 at an incident angle A and is directed toward the center of the motor rotation shaft 4. The lens holding member 6 is positioned as described above. Here, since the single lens 5 has a complicated shape, it is formed by directly molding a glass material.

【0014】本体フレーム1の他の端部には第二結像光
学系でありリニアリティ補正機能を有する長尺状の単レ
ンズ13が上記第一結像光学系の光軸14に対して直角
方向に対称に配され、かつ上記ポリゴンミラー2の走査
平面上に配されている。
At the other end of the body frame 1, a long single lens 13 which is a second imaging optical system and has a linearity correcting function is perpendicular to the optical axis 14 of the first imaging optical system. , And on the scanning plane of the polygon mirror 2.

【0015】図2において上記単レンズ13は第一面側
15が主走査方向に負の曲率半径を有するのに対して副
走査方向に正の曲率半径がレンズ中心から変化するトー
リック形状をなしており、第二面側16が主走査方向に
正の曲率半径を有するシリンダ形状から構成されてい
る。この単レンズ13も形状が複雑で長尺状となるため
主に耐熱性、耐吸水性のある高精度な樹脂成形品で構成
している。
In FIG. 2, the single lens 13 has a toric shape in which the first surface side 15 has a negative radius of curvature in the main scanning direction, while the positive radius of curvature changes in the sub-scanning direction from the lens center. The second surface 16 has a cylindrical shape having a positive radius of curvature in the main scanning direction. The single lens 13 also has a complicated shape and a long shape, and is mainly constituted by a high-precision resin molded product having heat resistance and water absorption.

【0016】上記ポリゴンミラー2から反射偏向された
光ビームは反射角Aでもって走査域Bの範囲を走査し長
尺トーリックレンズ13の副走査方向中心に入射され
る。
The light beam reflected and deflected from the polygon mirror 2 scans the scanning area B at a reflection angle A and enters the center of the long toric lens 13 in the sub-scanning direction.

【0017】上記長尺トーリックレンズ13とポリゴン
ミラー2間には光路変更用の折り返し反射ミラー17が
配されている。
Between the long toric lens 13 and the polygon mirror 2, a reflection mirror 17 for changing the optical path is arranged.

【0018】また上記走査域B以外に画像の書き始めの
同期を得るためビーム検出センサ19とシリンダレンズ
で構成されるビーム検出レンズ20が配されている。
In addition to the scanning area B, a beam detection sensor 19 and a beam detection lens 20 composed of a cylinder lens are provided to synchronize the start of image writing.

【0019】更に本体フレーム1の下部には主走査方向
に回転軸を有する感光ドラム18が配され電子写真現像
器(図示せず)により潜像露光される。
Further, a photosensitive drum 18 having a rotation axis in the main scanning direction is disposed below the main body frame 1, and is exposed to a latent image by an electrophotographic developing device (not shown).

【0020】以上のように構成された光ビーム走査装置
についてその動作を説明する。まず、システム本体から
の画像信号により半導体レーザ7へはビデオ信号が一定
のクロックにのって送られビーム検出センサ19での同
期検出信号に基づいて半導体レーザ7が点灯される。半
導体レーザ7からの出射光は単レンズ5を通過して主走
査方向はやや収束気味に絞られ円筒状のポリゴンミラー
2により感光ドラム18に所定のビーム径で絞られる。
一方、副走査方向はポリゴンミラー2上に一旦絞られ更
に発散した光ビームが長尺トーリックレンズ13により
感光ドラム18上に絞られる。このため主走査方向と副
走査方向のレンズの焦点距離の比が大きくアパーチャ9
の開口比も大きくなる。
The operation of the light beam scanning device configured as described above will be described. First, a video signal is sent to the semiconductor laser 7 according to an image signal from the system main body at a fixed clock, and the semiconductor laser 7 is turned on based on a synchronization detection signal from the beam detection sensor 19. The light emitted from the semiconductor laser 7 passes through the single lens 5 and is narrowed down slightly in the main scanning direction, and is narrowed down to a photosensitive drum 18 with a predetermined beam diameter by the cylindrical polygon mirror 2.
On the other hand, in the sub-scanning direction, the light beam once squeezed on the polygon mirror 2 is further squeezed onto the photosensitive drum 18 by the long toric lens 13. Therefore, the ratio of the focal length of the lens in the main scanning direction and the focal length of the lens in the sub-scanning direction is large, and the aperture 9 is large.
Also has a large aperture ratio.

【0021】従って、単レンズ5での出射ビーム形状を
半導体レーザ7での楕円ビーム以上に偏平ビームにする
必要がある。
Therefore, it is necessary to make the shape of the emitted beam from the single lens 5 flatter than the elliptical beam from the semiconductor laser 7.

【0022】ここで、ポリゴンミラー2に角度Aでもっ
て入射された光ビームは同じ反射角度で反射されるが、
ポリゴンミラー2の回転の際ミラー面は前後方向に移動
しそれにともなってポリゴンミラー2上での光ビームの
反射点は上下に移動し感光ドラム18上の走査面上に湾
曲として生じる。従って、入射角度Aは小さいほうが望
ましいが小さくなるに従い第一結像光学系と第二結像光
学系の干渉が生じビームが蹴られる恐れがある。このた
め干渉の生じない程度にポリゴンミラー2と第一結像光
学系のレンズとの距離を離す必要がありレンズ系装置の
大型化が問題となる。
Here, the light beam incident on the polygon mirror 2 at an angle A is reflected at the same reflection angle.
When the polygon mirror 2 is rotated, the mirror surface moves in the front-rear direction, and accordingly, the reflection point of the light beam on the polygon mirror 2 moves up and down to be curved on the scanning surface on the photosensitive drum 18. Therefore, it is desirable that the incident angle A is small, but as the incident angle A becomes smaller, interference between the first imaging optical system and the second imaging optical system occurs, and the beam may be kicked. For this reason, it is necessary to keep the distance between the polygon mirror 2 and the lens of the first imaging optical system to such an extent that interference does not occur, and there is a problem in increasing the size of the lens system.

【0023】本実施例では第一結像光学系を上記単レン
ズ5に置き換えることによりポリゴンミラー2と光源と
の距離を大きくとることなく入射角度Aを小さく設定で
き、所要の結像特性を得ることができる。
In this embodiment, by replacing the first image forming optical system with the single lens 5, the incident angle A can be set small without increasing the distance between the polygon mirror 2 and the light source, and the required image forming characteristics are obtained. be able to.

【0024】本実施例において、ポリゴンミラー2の曲
率半径R,内接半径r,ポリゴンミラー2と単レンズ5
間距離L,ポリゴンミラー2と長尺トーリックレンズ1
3間距離F,感光ドラム18と長尺トーリックレンズ1
3間距離D,入射角度A,走査角度B,単レンズ5の副
走査方向の第一面側曲率半径S1,第二面側曲率半径S
2をそれぞれ以下の寸法に設定することにより感光ドラ
ム18上での走査湾曲を0.2mm以下にすることができ
る。
In this embodiment, the curvature radius R and the inscribed radius r of the polygon mirror 2, the polygon mirror 2 and the single lens 5
Distance L, polygon mirror 2 and long toric lens 1
3 distance F, photosensitive drum 18 and long toric lens 1
The distance D between three, the incident angle A, the scanning angle B, the first surface side radius of curvature S1 and the second surface side radius of curvature S of the single lens 5 in the sub-scanning direction.
By setting each of the two to the following dimensions, the scanning curvature on the photosensitive drum 18 can be reduced to 0.2 mm or less.

【0025】R=140mm,r=25mm,L=70mm,
F=152mm,D=83mm,A=2.5度,B=30
度,S1=3mm,S2=130mm また、単レンズ5からの出射光を光軸を通過させて直接
ポリゴンミラー2に入射しているためポリゴンミラー2
面上での位置変動に対しても影響が少ない優れた効果が
ある。従って、結像特性がよくなりさらなる高解像度化
に対応できる。更にこの光学構成は上記光軸に対して対
称であるためレンズ製作上容易でありしかも単レンズ5
はガラス成形でもって形成されるため部品点数が大幅に
削減しコスト的にも信頼性の面でも有利である。
R = 140 mm, r = 25 mm, L = 70 mm,
F = 152 mm, D = 83 mm, A = 2.5 degrees, B = 30
Degree, S1 = 3 mm, S2 = 130 mm Also, since the light emitted from the single lens 5 passes through the optical axis and directly enters the polygon mirror 2, the polygon mirror 2
There is an excellent effect that has little influence on the position fluctuation on the surface. Accordingly, the imaging characteristics are improved, and it is possible to cope with higher resolution. Further, since this optical configuration is symmetric with respect to the optical axis, it is easy to manufacture a lens,
Since glass is formed by glass molding, the number of parts is greatly reduced, which is advantageous in terms of cost and reliability.

【0026】[0026]

【発明の効果】以上のように本発明は、偏平な光ビーム
を発する光源と、前記光ビームを整形収束させる第一結
像光学系と、光源からの光ビームを反射して偏向走査す
る偏向手段と、前記偏向走査面上にあり偏向された光ビ
ームを感光ドラム面に結像させる第二結像光学系とを備
えた光ビーム走査装置であって、前記第一結像光学系は
単レンズから構成され偏向手段に対し入射光軸方向を偏
向走査平面に対し所定の角度で入射し偏向走査平面から
見て第二結像光学系の光軸方向と重なる構成を有するこ
とよりポリゴンミラー2と光源との距離を大きくとるこ
となく入射角度を小さく設定でき結像特性に対し優れた
効果を有する光ビーム走査装置を実現できるものであ
る。
As described above, the present invention provides a light source that emits a flat light beam, a first imaging optical system that shapes and converges the light beam, and a deflecting device that reflects and scans the light beam from the light source. Means, and a second imaging optical system for forming an image of the deflected light beam on the deflection scanning surface on a photosensitive drum surface, wherein the first imaging optical system is a single imaging optical system. The polygon mirror 2 has a configuration in which the direction of the incident optical axis is incident on the deflection means at a predetermined angle with respect to the deflection scanning plane and overlaps the optical axis direction of the second imaging optical system when viewed from the deflection scanning plane. A light beam scanning device which can set the incident angle small without increasing the distance between the light beam and the light source and has an excellent effect on the imaging characteristics can be realized.

【0027】また、単レンズ5からの出射光を光軸を通
過させて直接ポリゴンミラー2に入射しているためポリ
ゴンミラー2面上での位置変動に対しても影響が少ない
優れた効果がある。更にこの光学系は対称系でありしか
も単レンズ5はガラス成形でもって形成されるため部品
点数が大幅に削減しコスト的にも信頼性の面でも有利で
ある。
Further, since the light emitted from the single lens 5 is directly incident on the polygon mirror 2 after passing through the optical axis, there is an excellent effect that there is little influence on the position fluctuation on the polygon mirror 2 surface. . Further, since this optical system is a symmetrical system and the single lens 5 is formed by glass molding, the number of parts is greatly reduced, which is advantageous in terms of cost and reliability.

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

【図1】本発明の実施例における光ビーム走査装置の斜
視図
FIG. 1 is a perspective view of a light beam scanning device according to an embodiment of the present invention.

【図2】本発明の実施例における光ビーム走査装置の光
学系
FIG. 2 is an optical system of a light beam scanning device according to an embodiment of the present invention.

【図3】(a)本発明の実施例における第一結像光学系
の主走査方向の断面図 (b)本発明の実施例における第一結像光学系の副走査
方向の断面図
3A is a sectional view of a first imaging optical system in a main scanning direction according to an embodiment of the present invention. FIG. 3B is a sectional view of a first imaging optical system in a sub-scanning direction according to an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 本体フレーム 2 ポリゴンミラー 5 単レンズ 6 レンズ保持部材 7 半導体レーザ 9 アパーチャ 13 長尺トーリックレンズ 17 折り返しミラー 18 感光ドラム DESCRIPTION OF SYMBOLS 1 Main body frame 2 Polygon mirror 5 Single lens 6 Lens holding member 7 Semiconductor laser 9 Aperture 13 Long toric lens 17 Folding mirror 18 Photosensitive drum

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】偏平な光ビームを発する光源と、前記光ビ
ームを整形収束させる第一結像光学系と、光源からの光
ビームを反射して偏向走査する偏向手段と、前記偏向走
査面上にあり偏向された光ビームを感光ドラム面に結像
させる第二結像光学系とを備えた光ビーム走査装置であ
って、前記第一結像光学系は単レンズからなり偏向手段
に対し入射光軸方向を偏向走査平面に対し所定の角度で
入射し偏向走査平面から見て第二結像光学系の光軸方向
と重なる構成を有していることを特徴とする光ビーム走
査装置。
A light source for emitting a flat light beam; a first imaging optical system for shaping and converging the light beam; a deflecting means for reflecting and deflecting and scanning the light beam from the light source; A second imaging optical system for forming an image of the deflected light beam on the photosensitive drum surface, wherein the first imaging optical system comprises a single lens and is incident on the deflecting means. A light beam scanning apparatus, wherein the optical axis direction is incident at a predetermined angle with respect to the deflection scanning plane and overlaps with the optical axis direction of the second imaging optical system when viewed from the deflection scanning plane.
JP5034793A 1993-03-11 1993-03-11 Light beam scanning device Expired - Lifetime JP2730443B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5034793A JP2730443B2 (en) 1993-03-11 1993-03-11 Light beam scanning device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5034793A JP2730443B2 (en) 1993-03-11 1993-03-11 Light beam scanning device
US08/207,690 US5652611A (en) 1993-03-11 1994-03-09 Optical scanning system and image forming apparatus employing same for electrophoto graphically forming images

Publications (2)

Publication Number Publication Date
JPH06265806A JPH06265806A (en) 1994-09-22
JP2730443B2 true JP2730443B2 (en) 1998-03-25

Family

ID=12856386

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5034793A Expired - Lifetime JP2730443B2 (en) 1993-03-11 1993-03-11 Light beam scanning device

Country Status (1)

Country Link
JP (1) JP2730443B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09251138A (en) * 1996-01-10 1997-09-22 Ricoh Co Ltd Optical scanning device

Also Published As

Publication number Publication date
JPH06265806A (en) 1994-09-22

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