JPS63307421A - Light beam scanner - Google Patents
Light beam scannerInfo
- Publication number
- JPS63307421A JPS63307421A JP14458887A JP14458887A JPS63307421A JP S63307421 A JPS63307421 A JP S63307421A JP 14458887 A JP14458887 A JP 14458887A JP 14458887 A JP14458887 A JP 14458887A JP S63307421 A JPS63307421 A JP S63307421A
- Authority
- JP
- Japan
- Prior art keywords
- slit
- scanning direction
- main scanning
- incident
- diameter
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 238000003384 imaging method Methods 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 108091008695 photoreceptors Proteins 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は光ビーム走査装置に関し、より詳細には、レー
ザープリンタ、ディジタル複写機、ファクシミリ等にお
ける光書込み系に適用しうる光ビーム走査装置に関する
ものである。Detailed Description of the Invention (Technical Field) The present invention relates to a light beam scanning device, and more particularly to a light beam scanning device that can be applied to optical writing systems in laser printers, digital copying machines, facsimile machines, etc. .
（従来技術）
従来、被走査面（例えば感光体）上に画像形成に必要な
所要スポット径を以てビームを結像させるために、結像
レンズ以前の光路上にビーム整形用のスリットを設けて
おき、該スリット通過後のビームを偏向器の反射面にそ
の法線方向に対して傾けて入射させ、その反射光を入射
ビームとして上記結像レンズに入射させるようにしてい
る光ビーム走査装置が知られている。(Prior Art) Conventionally, in order to form a beam onto a scanned surface (for example, a photoreceptor) with a required spot diameter necessary for image formation, a beam shaping slit has been provided on the optical path before the imaging lens. An optical beam scanning device is known in which the beam after passing through the slit is incident on a reflecting surface of a deflector at an angle relative to its normal direction, and the reflected light is made incident on the imaging lens as an incident beam. It is being
例えば、第４図、第５図、第９図において光源たる半導
体レーザー３２より発散したビームはコリメータレンズ
３３により平行光化されてからスリ０ツト３４により整
形されて半導体レーザーユニット２１より出射される。For example, in FIGS. 4, 5, and 9, a beam diverged from a semiconductor laser 32 serving as a light source is collimated by a collimator lens 33, shaped by a slit 34, and emitted from the semiconductor laser unit 21. .
そして、このビームは第１ミラー２２により、偏向器２
３の反射面を構成する円柱を斜めに裁断した如き反射面
のピラミダルミラー２４の略回転軸にそって入射される
。Then, this beam is transmitted to the deflector 2 by the first mirror 22.
The light is incident approximately along the axis of rotation of the pyramidal mirror 24, which has a reflecting surface that is formed by cutting a cylinder forming the reflecting surface of No. 3 diagonally.
かかる状態の下でピラミダルミラー２４が回転すると、
これに伴ない偏向されてｆθレンズ２５に進み、等速比
されて第２ミラー２６の反射部３７にて光軸を曲げられ
、トロイダルレンズ２７を通り、感光体ドラム１の外周
面に結像される。When the pyramidal mirror 24 rotates under such conditions,
Along with this, it is deflected and proceeds to the fθ lens 25, is made into a constant velocity ratio, the optical axis is bent by the reflection part 37 of the second mirror 26, passes through the toroidal lens 27, and is imaged on the outer peripheral surface of the photoreceptor drum 1. be done.
なお、ｆＯレンズ２５と第２ミラー２６との間に配置さ
れた光ファイバー３５は、フォトセンサー３６に導かれ
ておりこれらは書出し位置を決定する同期光を取り出す
ためのものである。Note that an optical fiber 35 placed between the fO lens 25 and the second mirror 26 is guided to a photosensor 36, and is used to extract synchronized light for determining the writing start position.
このような光学系において、偏向器２３以前におけるビ
ーム整形に係るスリット３４はレーザーユニット２１と
一体的に不動部材に固定されており、かかる構成により
以下の問題を生じていた。In such an optical system, the slit 34 for beam shaping before the deflector 23 is fixed to a fixed member integrally with the laser unit 21, and this configuration has caused the following problems.
第６図に示す如く、スリット３４（第９図参照）で整形
された楕円の入射ビームＬＮが、第１ミラー２２により
反射されて、ピラミダルミラー２４に入射する訳である
。As shown in FIG. 6, the elliptical incident beam LN shaped by the slit 34 (see FIG. 9) is reflected by the first mirror 22 and enters the pyramidal mirror 24.
ここで、第６図に示す如く、ピラミダルミラー２４のあ
る回転位置では入射ビームＬＮの径ａは反射後１反射ビ
ームＬＯの径が主走査方向であるＸ軸方向に長軸を有す
る径ａの楕円のビームとなる。しかし、入射角が法線方
向に対して傾いているためピラミダルミラー２４が９０
°回転すると第７図に示す如く反射ビームＬＯの径が主
走査方向と直交する副走査方向たるｙ軸方向に長軸を有
する径ａの楕円ビームとなる。Here, as shown in FIG. 6, at a certain rotational position of the pyramidal mirror 24, the diameter a of the incident beam LN is the diameter a of one reflected beam LO after reflection, which has its long axis in the X-axis direction, which is the main scanning direction. It becomes an elliptical beam. However, since the incident angle is tilted with respect to the normal direction, the pyramidal mirror 24 is
When rotated by .degree., as shown in FIG. 7, the reflected beam LO becomes an elliptical beam having a diameter a and a major axis in the y-axis direction, which is the sub-scanning direction orthogonal to the main-scanning direction.
勿論、楕円ビームにおいて、長軸方向に直交する短軸方
向についての径も上記座標軸方向についてそれぞれ変化
し、その結果、ピラミダルミラー２４が９０°回転する
間に偏向ビームは感光体ｌ上で回転し、９０１回転した
ところで丁度、主走査方向と副走査方向とで長軸と短軸
の位置が逆転してしまう。Of course, in the elliptical beam, the diameter in the minor axis direction perpendicular to the major axis direction also changes in the coordinate axis direction, and as a result, while the pyramidal mirror 24 rotates 90 degrees, the deflected beam rotates on the photoreceptor l. , 901 rotations, the positions of the major axis and minor axis are reversed between the main scanning direction and the sub-scanning direction.
ｆθレンズ２５やトロイダルレンズ２７等の軽微光学系
は９通常、レンズに入射するビームの径により結像径が
決定されるし、又、レンズに入射する入射ビームの径は
、主走査方向、副走査方向で異なるため、上記の如く偏
向ビームの径が変化すると感光体面上の最終スポット径
がばらばらに異なり、画像品質が劣悪となるのである。In light optical systems such as the f-theta lens 25 and the toroidal lens 27, the imaging diameter is usually determined by the diameter of the beam incident on the lens, and the diameter of the incident beam incident on the lens is Since it differs in the scanning direction, when the diameter of the deflected beam changes as described above, the final spot diameter on the photoreceptor surface varies, resulting in poor image quality.
すなわち、楕円ビームを偏向器の反射面法線方向と有限
のある角度で入射させ、これを偏向させるようなビーム
走査装置において、特に入射角と反射角とが約４５°を
なす光学的配置をとる場合には偏向される楕円ビームが
偏向器の回転により。In other words, in a beam scanning device that makes an elliptical beam incident at a finite angle with respect to the normal direction of the reflecting surface of a deflector and deflects the beam, an optical arrangement in which the angle of incidence and the angle of reflection make about 45 degrees is particularly useful. When taking an elliptical beam, it is deflected by rotation of the deflector.
回転しながら走査され、結像レンズによる被走査面上で
の集光ビームのスポット径が主走査方向。It is scanned while rotating, and the spot diameter of the focused beam on the scanned surface by the imaging lens is in the main scanning direction.
副走査方向に対して変化し、ひいては画質に悪影響を及
ぼすという問題があったのである。There was a problem in that it changed in the sub-scanning direction, which in turn had an adverse effect on image quality.
（目 的）
従って１本発明の目的は偏向器の反射面に対する入射角
１反射角の関係は従来と変えることなく。(Objective) Therefore, one object of the present invention is to maintain the relationship between the angle of incidence and the angle of reflection with respect to the reflecting surface of the deflector without changing from the conventional one.
しかも偏向される楕円ビームについては被走査面上での
スポット径が主走査方向、副走査方向に対して変化する
ことのない光ビーム走査装置を提供することにある。Moreover, it is an object of the present invention to provide a light beam scanning device in which the spot diameter of a deflected elliptical beam on a surface to be scanned does not change in the main scanning direction and the sub-scanning direction.
（構 成）
本発明は上記目的を達成させるため、結像レンズへの入
射ビームの走査方向である主走査方向でのビーム径を整
形する円形スリットを偏向器以前に配置し、上記主走査
方向と直交する副走査方向でのビーム径を整形する全走
査角以上の開度を有する長形スリットを偏向器と結像レ
ンズの間に主走査方向にそわせて配置したことを特徴と
したものである。(Structure) In order to achieve the above object, the present invention arranges a circular slit before the deflector to shape the beam diameter in the main scanning direction, which is the scanning direction of the beam incident on the imaging lens, and A long slit with an opening greater than the entire scanning angle is arranged along the main scanning direction between the deflector and the imaging lens to shape the beam diameter in the sub-scanning direction orthogonal to the main scanning direction. It is.
以下１本発明の一実施例に基づいて具体的に説明する。A detailed description will be given below based on one embodiment of the present invention.
第１図に示されるように、ｆθレンズ２５に入射するビ
ーム径の主走査方向Ｘでの径と同径の円形スリット３８
５を有するスリット部材３８を偏向器２３、詳しくはピ
ラミダルミラー２４以前の光軸上に配置する５本例では
スリット部材３８をレーザーユニット２１内に、従来の
スリット３４に代えて配置している。As shown in FIG. 1, a circular slit 38 having the same diameter as the diameter of the beam incident on the fθ lens 25 in the main scanning direction
In this example, the slit member 38 having 5 is arranged on the optical axis before the deflector 23, specifically the pyramidal mirror 24. In this example, the slit member 38 is arranged inside the laser unit 21 in place of the conventional slit 34.
また、°第１図乃至第３図に示す如く長形スリット３９
５の形成されたスリット部材３９を、そのスリットの長
手方向を主走査方向Ｘにそわせて偏向器２３とｆＯレン
ズ２５の間に配置している。In addition, as shown in FIGS. 1 to 3, a long slit 39 is provided.
A slit member 39 having a number 5 formed therein is disposed between the deflector 23 and the fO lens 25 with the longitudinal direction of the slit aligned with the main scanning direction X.
長形スリット３９５の幅寸法は副走査方向ｙでの所要ビ
ーム径に合わせて形成されており、長手寸法は、ビーム
の必要走査長を満足する全走査角以上の開度を以て形成
されている。The width dimension of the elongated slit 395 is formed to match the required beam diameter in the sub-scanning direction y, and the longitudinal dimension is formed with an opening greater than the full scanning angle that satisfies the required scanning length of the beam.
以上の如く構成すれば、主走査方向でのピラミダルミラ
ー出射ビーム径は、ピラミダルミラー２４が回転したと
しても、該ミラーへの入射ビームが円形スリット３８５
で円形に整形されているため。With the above configuration, the diameter of the beam emitted from the pyramidal mirror in the main scanning direction is such that even if the pyramidal mirror 24 rotates, the beam incident on the mirror will not pass through the circular slit 385.
Because it is shaped into a circle.
その径は変化せずにスリット部材３９に向かう。Its diameter remains unchanged toward the slit member 39.
そして、第２図に示す如くスリット部材３９へ向かう入
射ビーム４０は長形スリット３９Ｓにより副走査方向ｙ
を整形されてｆＯレンズ２５に向かい、その入射ビーム
４１は常に等しい主走査方向Ｘ、副走査方向ｙでのビー
ム径を維持し、所望の一定のスポットが感光体ドラム１
上に結像され画像品質を向上させることができる。As shown in FIG. 2, the incident beam 40 directed toward the slit member 39 is passed through the elongated slit 39S in the sub-scanning direction y.
The incident beam 41 is shaped and directed to the fO lens 25, and the incident beam 41 always maintains the same beam diameter in the main scanning direction
image quality can be improved.
なお、スリット３９Ｓの位置は、光軸上偏向器２４とｆ
Ｏレンズ２５の間であればその位置は任意に定め得るが
、偏向器２４に近い方がスリットの主走査方向での幅寸
法も小さくすることができ、取付けの自由度も増す。そ
の反面、感光体ｌに対する結像位置を保証するための取
付精度は厳しさが要求され、る。従って、上記事業をａ
金的に勘案して最適の位置が設定される。Note that the position of the slit 39S is between the on-axis deflector 24 and f.
The position of the slit can be arbitrarily determined as long as it is between the O lenses 25, but the closer the slit is to the deflector 24, the smaller the width of the slit in the main scanning direction can be, increasing the degree of freedom in attachment. On the other hand, strict mounting accuracy is required to ensure the image forming position with respect to the photoreceptor l. Therefore, the above business is a
The optimal position is set in consideration of financial considerations.
次に１本光明の実施例に好適なレーザープリンタについ
て第８図、第９図により説明する。Next, a laser printer suitable for a single-beam laser printer will be explained with reference to FIGS. 8 and 9.
第８図において、感光体ドラムｌの局面には。In FIG. 8, the aspect of the photoreceptor drum l is as follows.
矢印で示すその回転方向の順に、帯電器２、現像ユニッ
ト３．転写チャージャ４、クリーニングユニット５が配
置されており、帯電器２と現像ユニット３との間の位置
６で感光体ドラム１に書込み光線が入射して露光するよ
うに書込光学ユニット７が設けられている。Charger 2, developing unit 3. A transfer charger 4 and a cleaning unit 5 are arranged, and a writing optical unit 7 is provided so that a writing beam enters and exposes the photosensitive drum 1 at a position 6 between the charger 2 and the developing unit 3. ing.
この実施例の装置では、帯電器２．光書込み位置６は感
光体ドラム１の下側に配置され、光害込ユニット７は感
光体ドラムｔ、ａｍユニット３、クリーニングユニット
５の下位に設けられている。In the device of this embodiment, a charger 2. The optical writing position 6 is arranged below the photoreceptor drum 1, and the light pollution unit 7 is provided below the photoreceptor drum t, the am unit 3, and the cleaning unit 5.
又、転写チャージャ４は感光体ドラムｌの上側に配置さ
れている。転写チャージャ４と感光体ドラム１との間の
転写部に転写紙を給紙する給紙カセット８は光書込ユニ
ット７の更に下部に設けられ。Further, the transfer charger 4 is arranged above the photosensitive drum l. A paper feed cassette 8 for feeding transfer paper to a transfer section between the transfer charger 4 and the photosensitive drum 1 is provided further below the optical writing unit 7.
転写紙はフィードローラ９とこれに圧接するブリクショ
ンパッド１０により重送を分離されて１枚ずつ送り出さ
れ、現像ユニット３の側方で大きくＵターンし、現像ユ
ニット３の上方に設けられたレジストローラ対１１．１
２により感光体ドラム１上に形成された画像と位置が整
合するようにタイミングを合せて転写部に給紙される。The transfer paper is separated from double feeding by the feed roller 9 and the friction pad 10 that is in pressure contact with it, and is sent out one by one.The transfer paper makes a large U-turn on the side of the developing unit 3, and then passes through the resist provided above the developing unit 3. Roller pair 11.1
2, the paper is fed to the transfer section at the same timing as the image formed on the photosensitive drum 1.
転写後の転写紙径路には定着ユニット１３が設けられ、
その排出側には排紙トレイ１４が設けられている。A fixing unit 13 is provided in the transfer paper path after transfer,
A paper discharge tray 14 is provided on the discharge side.
書込光学ユニット７は、第８図乃至第９図に示すように
、レーザーユニット２１から発した画像情報信号に応じ
て点滅する光は第１ミラー２２で反射し、スキャナモー
タで駆動される偏向器２３の軸に一体に取付けられたミ
ラーとしてのピラミダルミラー２４に入射し、一定の角
度範囲を繰返し偏向する。偏向光はｆθレンズ２５によ
り感光体ドラム１上の入射位１１６で直線上に結像し等
速度で投影点が移動するように補正され、第２ミラー２
６、トロイダルレンズ２７を介して感光体ドラム１に入
射し。As shown in FIGS. 8 to 9, in the writing optical unit 7, light that flashes in response to an image information signal emitted from a laser unit 21 is reflected by a first mirror 22, and is deflected by a scanner motor. The light enters a pyramidal mirror 24, which is a mirror integrally attached to the axis of the device 23, and is repeatedly deflected within a certain angular range. The deflected light is corrected by the fθ lens 25 so that it forms an image on a straight line at the incident position 116 on the photoreceptor drum 1, and the projection point moves at a constant speed.
6. The light enters the photosensitive drum 1 via the toroidal lens 27.
入射光の偏向により主走査が行なわれ、感光体ドラム１
の回転により副走査が行なわれ、画像情報信号に応じた
画像が書込まれ、静電潜像が形成される。書込光学ユニ
ット７の構成要素は装置のペース力ｔ＜−２８０に直接
取付けられている。Main scanning is performed by deflecting the incident light, and the photoreceptor drum 1
Sub-scanning is performed by the rotation of , an image according to the image information signal is written, and an electrostatic latent image is formed. The components of the writing optical unit 7 are attached directly to the pacing force t<-280 of the device.
感光体ドラム１上に形成された静電潜像は、現像ユニッ
ト３により現像されてトナー像が形され、レジストロー
ラ対１１．１２により給紙された転写紙に転写チャージ
ャ４の作用により転写される。転写後感光体ドラム１よ
り分離された転写紙は定着着ユニット１３により定着さ
れ、排紙トレイ１４に排出される。The electrostatic latent image formed on the photosensitive drum 1 is developed by the developing unit 3 to form a toner image, which is transferred by the action of the transfer charger 4 onto a transfer paper fed by a pair of registration rollers 11 and 12. Ru. After the transfer, the transfer paper separated from the photosensitive drum 1 is fixed by the fixing unit 13 and discharged to the paper discharge tray 14.
一方、転写検感光体ドラム１上に残留したトナーはクリ
ーニングユニット５によりクリーニングされ、次回の作
像に備えられる。On the other hand, the toner remaining on the transfer detection photoreceptor drum 1 is cleaned by the cleaning unit 5 and prepared for the next image formation.
光ビームを偏向させる手段としては従来１回転多面鏡や
ホロスキャナーが知られている。これら回転多面鏡やホ
ロスキャナーでは、多面鏡やホロディスクが１回転する
間に、光ビームは、複数の鏡面ないしは複数のホログラ
ム格子により、複数回偏向せしめられる。このように１
回転多面鏡やホロスキャナーでは、光ビームの偏向に複
数の鏡面やホログラム格子で関与するところから、所謂
面倒れの問題として知られている問題が発生し。Conventionally, single-rotation polygon mirrors and holo scanners are known as means for deflecting light beams. In these rotating polygon mirrors and holo scanners, a light beam is deflected multiple times by a plurality of mirror surfaces or a plurality of hologram gratings during one rotation of the polygon mirror or hologram. Like this 1
In rotating polygon mirrors and holo scanners, a problem known as the so-called face tilt problem occurs because multiple mirror surfaces or hologram gratings are involved in the deflection of the light beam.
この面倒れを捕正するために、光学系が複雑化したりす
る問題があった。In order to correct this surface tilt, there is a problem in that the optical system becomes complicated.
このような問題に鑑みて、回転可能な反射媒体の鏡面を
１回転軸に対して傾け、偏向させるべき光ビームを１回
転軸に沿って入射させ、上記鏡面により反射せしめ１反
射媒体の回転により、反射ビームを３６０度偏向する偏
向手段が提案されつつある。かかる偏向手段における上
記反射媒体はピラミダルミラーと呼ばれている。In view of this problem, the mirror surface of a rotatable reflective medium is tilted with respect to the one-rotation axis, and the light beam to be deflected is incident along the one-rotation axis and reflected by the mirror surface. , deflection means for deflecting a reflected beam by 360 degrees are being proposed. The reflecting medium in such a deflecting means is called a pyramidal mirror.
なお、ピラミダルミラーを用いる偏向方式では。In addition, in the deflection method using a pyramidal mirror.
光ビームの偏向に、ただひとつの鏡面が関与するのみで
あるので、前述した面倒れの問題は原理的に解決されて
いる。Since only one mirror surface is involved in the deflection of the light beam, the above-mentioned surface tilt problem is solved in principle.
（効 果）
本発明によれば、走査ライン上での楕円ビームの回転に
よるビームスポット径の変化が解消され。(Effects) According to the present invention, changes in beam spot diameter due to rotation of the elliptical beam on the scanning line are eliminated.
被走査面上に均一なビームスポットを結像することがで
き、以て画像品質の向上を図ることができ好都合である
。This is advantageous because it is possible to form a uniform beam spot on the surface to be scanned, thereby improving image quality.
第１図乃至第３図は本発明の一実施例を説明した光ビー
ム走査装置の構成図、第４図、第５図はそれぞれ光ビー
ム走査装置の光学系の配置を説明した図、第６図はビラ
′ミダルミラーの任意の回転位置における偏向態様を説
明した図、第７図は同上図の状態よりも９０＠回転させ
たときの偏向態様を説明した図、第８図は本発明の実施
に好適なレーザープリンタの説明図、第９図はレーザー
ユニットと偏向器の配置を説明した図である。
２３・・・・偏向器、２４・・・・ピラミダルミラー、
３８５・・・円形スリット、３９Ｓ・・・・長形スリッ
ト。
雇２．図1 to 3 are configuration diagrams of a light beam scanning device explaining one embodiment of the present invention, FIGS. 4 and 5 are diagrams respectively explaining the arrangement of the optical system of the light beam scanning device, and FIG. The figure is a diagram explaining the deflection mode at an arbitrary rotational position of the midal mirror, FIG. 7 is a diagram explaining the deflection mode when rotated by 90 degrees from the state shown in the above figure, and FIG. 8 is a diagram explaining the deflection mode when the mirror is rotated 90@ FIG. 9 is a diagram illustrating the arrangement of a laser unit and a deflector. 23...deflector, 24...pyramidal mirror,
385...Circular slit, 39S...Long slit. Employment 2. figure
Claims (1)
ームを結像させるために、結像レンズ以前の光路上にビ
ーム整形用のスリットを設けておき、該スリット通過後
のビームを偏向器の反射面にその法線方向に対して傾け
て入射させ、その反射光を入射ビームとして上記結像レ
ンズに入射させるようにしている光ビーム走査装置にお
いて、上記結像レンズへの入射ビームの走査方向である
主走査方向でのビーム径を整形する円形スリットを偏向
器以前に配置し、上記主走査方向と直交する副走査方向
でのビーム径を整形する全走査角以上の開度を有する長
形スリットを偏向器と結像レンズの間に主走査方向にそ
わせて配置したことを特徴とする光ビーム走査装置。In order to image the beam with the required spot diameter necessary for image formation on the scanned surface, a slit for beam shaping is provided on the optical path before the imaging lens, and the beam after passing through the slit is directed to the deflector. In a light beam scanning device in which light is incident on a reflecting surface at an angle with respect to its normal direction, and the reflected light is made incident on the imaging lens as an incident beam, the scanning direction of the incident beam on the imaging lens is A circular slit that shapes the beam diameter in the main scanning direction is arranged before the deflector, and an elongated shape having an opening greater than the full scanning angle that shapes the beam diameter in the sub-scanning direction orthogonal to the main scanning direction. A light beam scanning device characterized in that a slit is arranged between a deflector and an imaging lens along the main scanning direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14458887A JPS63307421A (en) | 1987-06-10 | 1987-06-10 | Light beam scanner |
| US07/113,668 US4943128A (en) | 1986-10-28 | 1987-10-28 | Light scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14458887A JPS63307421A (en) | 1987-06-10 | 1987-06-10 | Light beam scanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63307421A true JPS63307421A (en) | 1988-12-15 |
Family
ID=15365583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14458887A Pending JPS63307421A (en) | 1986-10-28 | 1987-06-10 | Light beam scanner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63307421A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS561665A (en) * | 1979-06-19 | 1981-01-09 | Nec Corp | Main scan rotary optical system for facsimile equipment |
| JPS56101121A (en) * | 1980-01-16 | 1981-08-13 | Fuji Photo Optical Co Ltd | Photoscanner |
| JPS61281214A (en) * | 1985-06-06 | 1986-12-11 | Fujitsu Ltd | Laser recorder |
-
1987
- 1987-06-10 JP JP14458887A patent/JPS63307421A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS561665A (en) * | 1979-06-19 | 1981-01-09 | Nec Corp | Main scan rotary optical system for facsimile equipment |
| JPS56101121A (en) * | 1980-01-16 | 1981-08-13 | Fuji Photo Optical Co Ltd | Photoscanner |
| JPS61281214A (en) * | 1985-06-06 | 1986-12-11 | Fujitsu Ltd | Laser recorder |
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