JPS62266515A - Rotary mechanism for optical scanning polygon mirror - Google Patents
Rotary mechanism for optical scanning polygon mirrorInfo
- Publication number
- JPS62266515A JPS62266515A JP11169886A JP11169886A JPS62266515A JP S62266515 A JPS62266515 A JP S62266515A JP 11169886 A JP11169886 A JP 11169886A JP 11169886 A JP11169886 A JP 11169886A JP S62266515 A JPS62266515 A JP S62266515A
- Authority
- JP
- Japan
- Prior art keywords
- polygon mirror
- rotor
- optical scanning
- outer diameter
- rotary shaft
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 29
- 239000010687 lubricating oil Substances 0.000 abstract description 11
- 239000003921 oil Substances 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 238000005461 lubrication Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/12—Scanning systems using multifaceted mirrors
- G02B26/121—Mechanical drive devices for polygonal mirrors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔概 要〕
本発明はレーザプリンタ等のレーザ走査光学系に用いら
れる光走査用多面鏡の回転機構において、主体となる軸
受ハウジング内に配設された上部軸受と下部軸受を介在
して、上部に光走査用多面鏡を保持した回転軸を軸支す
ると共に、該回転軸の下部と、該下部と対向するハウジ
ング壁面に、前記固定台及び光走査用多面鏡の外径より
も大きい外径形状を有する軸対向型モータを構成する回
転子と固定子を設けた構造とすることにより、高速回転
時の多面鏡に前記各軸受より飛散する潤滑油の飛散方向
を下方に変化させて、多面鏡の汚損を防止するようにし
たものである。[Detailed Description of the Invention] [Summary] The present invention relates to a rotation mechanism for an optical scanning polygon mirror used in a laser scanning optical system of a laser printer, etc. A rotating shaft holding an optical scanning polygon mirror on the upper part is supported via a bearing, and the fixed base and the optical scanning polygon mirror are mounted on the lower part of the rotating shaft and on the housing wall facing the lower part. By adopting a structure that includes a rotor and a stator that constitute a shaft-opposed motor with an outer diameter larger than the outer diameter, the direction of scattering of lubricating oil from each bearing on the polygon mirror during high-speed rotation can be controlled. It is designed to change downward to prevent the polygon mirror from becoming dirty.
本発明はレーザプリンタ等のレーザ走査光学系に用いら
れる光走査用多面鏡の回転機構に係り、特に高速回転時
の多面鏡が、軸受より飛散する潤滑油により汚損するこ
とを特殊な構成を用いずに防止した新しい回転機構に関
するものである。The present invention relates to a rotation mechanism for an optical scanning polygon mirror used in a laser scanning optical system such as a laser printer, and uses a special configuration to prevent the polygon mirror from becoming contaminated by lubricating oil splashed from a bearing during high-speed rotation. This article relates to a new rotation mechanism that prevents this from happening.
レーザ走査光学系を用いた電子写真転写方式のプリンタ
、即ちレーザプリンタはレーザ装置から連続発振するレ
ーザビームを光変調器により印刷情報に対応した電気信
号によって0N−OFF変調し、高速回転する多面鏡で
反射せしめて回転する感光体表面上に集光させ、その回
転軸方向に走査露光して静電潜像を形成している。An electrophotographic transfer printer that uses a laser scanning optical system, that is, a laser printer, modulates a continuously oscillated laser beam from a laser device using an optical modulator using an electrical signal corresponding to the printing information, and uses a polygon mirror that rotates at high speed. The light is reflected and focused on the surface of a rotating photoreceptor, and is scanned and exposed in the direction of the rotation axis to form an electrostatic latent image.
その静電潜像は現像器での現像により静電的にトナーと
呼ばれる黒色粉体が付着されて可視像が形成される。こ
の可視像を電界が付加された記録用紙に転写した後定着
を行う。以下このようなプロセスを繰り返して印刷記録
を行うものである。The electrostatic latent image is developed with a developing device, and black powder called toner is electrostatically attached thereto to form a visible image. This visible image is transferred to recording paper to which an electric field is applied and then fixed. Thereafter, such a process is repeated to perform print recording.
このようなレーザプリンタにおいて鮮明な印字品質を得
るためには、レーザ走査光学系に用いられている回転多
面鏡の反射面が常に清潔で、また該多面鏡の高い面倒れ
精度を確保することが極めて重要である。In order to obtain clear print quality in such laser printers, it is necessary to keep the reflective surface of the rotating polygon mirror used in the laser scanning optical system always clean and to ensure that the polygon mirror has a high surface tilt accuracy. extremely important.
従来のレーザ光走査用多面鏡の回転機構は、第4図の断
面図に示すように下部にモータを構成する固定子2を備
えた軸受ハウジングl内に、上部軸受3と下部軸受4を
介して下端部に回転子6を備えた回転軸5が軸支される
と共に、該回転軸5の上部固定台7上に、例えば8〜1
2面体の多面鏡8がゴムリング9を介してねし止め10
等により固定されている。前記多面鏡8は回転軸5の下
端部の回転子6と対向するハウジング側面に設けた固定
子2とで構成された駆動モーターの回転駆動によって高
速回転を可能にしている。As shown in the cross-sectional view of FIG. 4, the conventional rotation mechanism of a polygon mirror for laser beam scanning is constructed such that an upper bearing 3 and a lower bearing 4 are installed in a bearing housing l equipped with a stator 2 that constitutes a motor at the bottom. A rotary shaft 5 having a rotor 6 at its lower end is pivotally supported, and on an upper fixed base 7 of the rotary shaft 5, for example, 8 to 1
A dihedral polygon mirror 8 is secured to a screw 10 via a rubber ring 9.
It is fixed by etc. The polygon mirror 8 can be rotated at high speed by a drive motor comprising a rotor 6 at the lower end of the rotating shaft 5 and a stator 2 provided on the opposite side of the housing.
また前記回転軸5の回転振れを最小にして多面鏡8の面
倒れ回転精度を高めるために、該回転軸5を嵌合軸支す
る上部軸受3と下部軸受4間の配設距離を成る程度大き
く確保すると共に、例えば該上部軸受3と下部軸受4の
内の下部軸受4に、ボールベアリング等を通用し、下部
軸受4の軸受ハウジング1側との嵌合部を緩嵌状態とし
、この下部軸受4の緩嵌部を回転軸5に周設したスプリ
ング11により押圧せしめて該下部軸受4内の遊びをな
くした構成がとられている。In addition, in order to minimize the rotational runout of the rotating shaft 5 and improve the rotation precision of the surface tilt of the polygon mirror 8, the distance between the upper bearing 3 and the lower bearing 4, which fit and support the rotating shaft 5, is set to a certain degree. For example, a ball bearing or the like is passed through the lower bearing 4 of the upper bearing 3 and the lower bearing 4, and the fitting part of the lower bearing 4 with the bearing housing 1 side is loosely fitted. A loose fitting portion of the bearing 4 is pressed by a spring 11 provided around the rotating shaft 5 to eliminate play within the lower bearing 4.
ところで、このような従来の光走査用多面鏡の回転機構
にあっては、該多面鏡8の高速回転時に回転軸5を嵌合
軸支している上部軸受3や下部軸受4より流出する潤滑
油が軸受ハウジングlの上面と該回転軸5の上部固定台
7との間隙からミス1−状に飛散して該多面鏡8の反射
面を汚損する不都合があり、このため前記軸受ハウジン
グlの上面と該回転軸5の上部固定台7との間に、ラビ
リンスシール部12を設けて潤滑油の流出、飛散等を防
止している。By the way, in the rotation mechanism of such a conventional optical scanning polygon mirror, when the polygon mirror 8 rotates at high speed, lubricant flows out from the upper bearing 3 and the lower bearing 4 that fit and support the rotating shaft 5. There is an inconvenience that oil scatters from the gap between the upper surface of the bearing housing l and the upper fixing base 7 of the rotary shaft 5 and stains the reflective surface of the polygon mirror 8. A labyrinth seal portion 12 is provided between the upper surface and the upper fixing base 7 of the rotary shaft 5 to prevent lubricating oil from leaking or scattering.
しかし、このような潤滑油流出防止用のラビリンスシー
ル部12を設けるには複雑な加工工程を必要とし、その
加工コストが高くなるといった欠点があり、簡単な低コ
ストの構成により潤滑油の流出、或いは飛散を防止する
構造が要求されている。However, providing such a labyrinth seal part 12 for preventing lubricant oil leakage requires a complicated machining process, which increases the machining cost. Alternatively, a structure that prevents scattering is required.
本発明はこのような従来の実情に鑑み、例えば中心に回
転軸を設けた円板を回転した際に、該回転軸の周囲の空
気が最大周速度となる前記円板の外周部方向に流れる現
象に着目して、第2図に示すように軸受ハウジング21
内に上部軸受22と下部軸受23により軸支された回転
軸24の上部に多面鏡に相当する上部円板25を、また
下部に前記円板25の外径よりも大きい外径形状を有す
る駆動モータを構成する回転子に相当する下部円板26
を付設した構成とし、この回転軸24を回転させると、
前記上部円板25の回転周速度よりも外径形状の大きい
下部円板26例の回転周速度が大きいために、軸受ハウ
ジング21内の回転軸24周囲が減圧状となって空気流
が矢印で示す方向に発生する。このような原理作用を利
用して光走査用多面鏡を高速回転した際に、前記上部軸
受や下部軸受より流出する潤滑油を多面鏡側へ飛散する
ことを阻止して、該多面鏡の潤滑油による汚損を防止し
た新規な光走査用多面鏡の回転機構を提供することを目
的とするものである。In view of such conventional circumstances, the present invention provides a system in which, for example, when a disk with a rotating shaft provided at the center is rotated, air around the rotating shaft flows toward the outer periphery of the disk where the maximum circumferential speed is achieved. Focusing on the phenomenon, the bearing housing 21 as shown in FIG.
A rotating shaft 24, which is supported by an upper bearing 22 and a lower bearing 23, has an upper disk 25 corresponding to a polygon mirror on the upper part, and a drive having an outer diameter larger than the outer diameter of the disk 25 on the lower part. A lower disk 26 corresponding to a rotor constituting a motor
When the rotating shaft 24 is rotated,
Since the rotational circumferential speed of the lower disk 26 having a larger outer diameter than the rotational circumferential speed of the upper disk 25 is greater, the area around the rotating shaft 24 in the bearing housing 21 is under reduced pressure, and the air flow is as shown by the arrow. Occurs in the direction shown. Utilizing this principle, when the optical scanning polygon mirror is rotated at high speed, the lubricating oil flowing out from the upper and lower bearings is prevented from scattering toward the polygon mirror, thereby lubricating the polygon mirror. The object of the present invention is to provide a novel rotation mechanism for an optical scanning polygon mirror that prevents contamination by oil.
本発明は上記目的を達成するため、主体となる軸受ハウ
ジング内に上部軸受と下部軸受を介して、上端に光走査
用多面鏡を保持した回転軸を軸支すると共に、該回転軸
の下端と、該下部と対向するハウジング下部に、前記光
走査用多面鏡の外径よりも大きい外径形状を有する駆動
モータを構成する回転子と固定子を設けた構成とする。In order to achieve the above-mentioned object, the present invention pivots a rotating shaft that holds an optical scanning polygon mirror at its upper end within a main bearing housing through an upper bearing and a lower bearing, and also supports a rotating shaft that holds an optical scanning polygon mirror at its upper end. , a rotor and a stator constituting a drive motor having an outer diameter larger than the outer diameter of the optical scanning polygon mirror are provided in a lower part of the housing that faces the lower part.
本発明の回転機構では、回転軸を回転した際に、前記多
面鏡側の回転周速度よりも外径形状の大きい駆動モータ
を構成する回転子側の回転周速度が大きいため、軸受ハ
ウジング内の回転軸周囲の間隙が減圧状態となり、この
特注じる空気流が該回転軸に沿って下方向の駆動モータ
側へ流れる。In the rotation mechanism of the present invention, when the rotating shaft is rotated, the rotational peripheral speed of the rotor side constituting the drive motor having a larger outer diameter is greater than the rotational peripheral speed of the polygon mirror side, so that The gap around the axis of rotation is under reduced pressure, and this custom airflow flows along the axis of rotation and downward toward the drive motor.
従って、前記回転軸を軸支する上部軸受及び下部軸受よ
りelHh油が流出することがあっても、前記空気流に
より該/II壱油が多面鏡側へ飛散することがなくなり
、汚損が防止される。Therefore, even if the elHh oil leaks from the upper and lower bearings that support the rotating shaft, the air flow prevents the /II1 oil from scattering toward the polygon mirror, preventing contamination. Ru.
以下図面を用いて本発明の実施例について詳細に説明す
る。Embodiments of the present invention will be described in detail below with reference to the drawings.
第1図は本発明に係る光走査用多面鏡の回転機構の一実
施例を示す要部断面図である。FIG. 1 is a sectional view of essential parts showing an embodiment of a rotation mechanism for an optical scanning polygon mirror according to the present invention.
図において、31は軸受ハウジング、32は該軸受ハウ
ジング31内に配設されたボールベアリング等からなる
上部軸受33と下部軸受34によって軸支された回転軸
であり、該下部軸受34の緩嵌部は該回転軸32に周設
したスプリング40により押圧されて軸受内の遊びをな
くし、該回転軸32の回転振れ精度を高めている。In the figure, 31 is a bearing housing, 32 is a rotating shaft that is supported by an upper bearing 33 and a lower bearing 34 made of ball bearings etc. disposed inside the bearing housing 31, and a loose fitting portion of the lower bearing 34. is pressed by a spring 40 disposed around the rotating shaft 32 to eliminate play within the bearing and improve rotational runout accuracy of the rotating shaft 32.
またその回転軸32の上端部には光走査用の多面IJi
35がゴムリング36を介してねし止め37等により固
定配置され、下端部と、該下端部と対向する軸受ハウジ
ング31下面には、前記多面鏡35の外径よりも大きい
外径形状を有する駆動モータ、例えばアキシャルギャッ
プ型モータを構成する回転子38と固定子39が配設さ
れている。Also, at the upper end of the rotating shaft 32, there is a multifaceted IJ for optical scanning.
35 is fixed by a screw 37 or the like via a rubber ring 36, and the lower end and the lower surface of the bearing housing 31 facing the lower end have an outer diameter larger than the outer diameter of the polygon mirror 35. A rotor 38 and a stator 39 that constitute a drive motor, for example an axial gap type motor, are provided.
このように構成された光走査用多面鏡35の回転機構に
おいては、回転する前記多面鏡35の回転周速度よりも
外径形状の大きい駆動モータを構成する回転子38の回
転周速度が大きいことから、該回転子38の最大周速度
方向に空気の流れが生じて軸受ハウジング31内の回転
軸周囲の間隙が減圧状態となり、この特注じる空気流が
該回転軸32に沿って下方向の駆動モータ側へ流れる。In the rotation mechanism of the optical scanning polygon mirror 35 configured in this manner, the rotation circumferential speed of the rotor 38 constituting the drive motor having a larger outer diameter shape is higher than the rotation circumferential speed of the rotating polygon mirror 35. As a result, an air flow is generated in the direction of the maximum circumferential speed of the rotor 38, and the gap around the rotating shaft in the bearing housing 31 is reduced in pressure. Flows to the drive motor side.
従って、前記回転軸32を軸支している上部軸受33及
び下部軸受34から潤滑油が流出しても、前記空気流に
引き釣られて下方に移送され、該潤滑油が多面鏡側へ飛
散することがなくなり、該多面鏡35の反射面の汚損が
防止される。Therefore, even if lubricating oil flows out from the upper bearing 33 and lower bearing 34 that pivotally support the rotating shaft 32, the lubricating oil is drawn downward by the air flow and is scattered toward the polygon mirror. Therefore, the reflective surface of the polygon mirror 35 is prevented from becoming dirty.
尚、以上の実施例では多面鏡35の外径よりも大きい外
径形状を有する駆動モータとして、アキシャルギャップ
型モータを構成した場合の例について説明したが、本発
明はこの例に限定されるものではなく、例えば第3図に
示すように回転軸32の下端部に多面鏡35の外径より
も大きい外径形状のフランジ付き回転子41と、この回
転子41に対向する軸受ハウジング31の壁面に固定子
42を配設したラジアルギャップ型のモータを構成した
場合にも同様の効果が得られる。In addition, in the above embodiment, an example was explained in which an axial gap type motor was configured as the drive motor having an outer diameter larger than the outer diameter of the polygon mirror 35, but the present invention is limited to this example. Rather, for example, as shown in FIG. 3, a flanged rotor 41 with an outer diameter larger than the outer diameter of the polygon mirror 35 is attached to the lower end of the rotating shaft 32, and a wall surface of the bearing housing 31 that faces the rotor 41. A similar effect can be obtained when a radial gap type motor is constructed in which the stator 42 is disposed at the radial gap type motor.
以上の説明から明らかなように、本発明に係る光走査用
多面鏡の回転機構によれば、上端に光走査用多面鏡を保
持した回転軸の下端と、該下端と対向するハウジング下
部に、前記先走、査用多面鏡の外径よりも大きい外径形
状を有する駆動モータを構成する回転子と固定子を設け
た構成とすることにより、多面鏡の回転時の回転軸周囲
の空気が該多面鏡よりも外径形状の大きい駆動モータを
構成する回転子の最大周速度方向に流れ、この空気流に
よって前記上部及び下部軸受から流出する潤滑油が引き
ずられて下方に移送されるので、該潤滑油が多面鏡側へ
飛散することが阻止され、該多面鏡の反射面に対する潤
滑油汚損が容易に防止される優れた利点を有する。As is clear from the above description, according to the rotation mechanism of the optical scanning polygon mirror according to the present invention, the lower end of the rotating shaft holding the optical scanning polygon mirror at the upper end, and the lower part of the housing opposite to the lower end, By providing a rotor and a stator constituting a drive motor having an outer diameter larger than the outer diameter of the pre-scanning and scanning polygon mirrors, air around the rotation axis when the polygon mirror rotates can be reduced. The airflow flows in the direction of the maximum circumferential speed of the rotor constituting the drive motor, which has an outer diameter larger than that of the polygon mirror, and the lubricating oil flowing out from the upper and lower bearings is dragged and transferred downward by this airflow. This has an excellent advantage in that the lubricating oil is prevented from scattering toward the polygon mirror, and the lubricating oil is easily prevented from staining the reflective surface of the polygon mirror.
従って、この種の回転機構に通用して優れた効果を奏し
、信頼性の良い光走査用多面鏡の回転機構をRることが
可能となる。Therefore, it is possible to provide a highly reliable rotation mechanism for an optical scanning polygon mirror that can be used in this type of rotation mechanism and exhibits excellent effects.
第1図は本発明に係る光走査用多面鏡の回転機構の一実
施例を示す要部断面図、
第2図は本発明に係る光走査用多面鏡の回転機構の原理
を説明する要部断面図、
第3図は本発明に係る光走査用多面鏡の回転機構の他の
実施例を示す要部断面図、
第4図は従来の光走査用多面鏡の回転機構を説明するた
めの要部断面図である。
第1図乃至第3図において
21、31は軸受ハウジング、22.33は上部軸受、
23.34は下部軸受、24.32は回転軸、25は上
部円板、26は下部円板、35は多面鏡、38は回転子
、39.42は固定子、41はフランジ付き回転子をそ
れぞれ示す。
4険に3珂の尖プを例sit明すJ字巷p書庁Ji国第
1図
半完Bル岸理傷駒料瑞
第2図FIG. 1 is a sectional view of a main part showing an embodiment of the rotation mechanism of a polygon mirror for light scanning according to the present invention, and FIG. 2 is a main part illustrating the principle of the rotation mechanism of a polygon mirror for light scanning according to the present invention. 3 is a cross-sectional view of a main part showing another embodiment of the rotation mechanism of a polygon mirror for optical scanning according to the present invention, and FIG. 4 is a sectional view for explaining the rotation mechanism of a conventional polygon mirror for optical scanning. It is a sectional view of the main part. In FIGS. 1 to 3, 21 and 31 are bearing housings, 22 and 33 are upper bearings,
23.34 is a lower bearing, 24.32 is a rotating shaft, 25 is an upper disk, 26 is a lower disk, 35 is a polygon mirror, 38 is a rotor, 39.42 is a stator, 41 is a flanged rotor. Each is shown below. An example of 3 points on 4 slopes.
Claims (1)
軸受(33)と下部軸受(34)を介在して、上部に光
走査用多面鏡(35)を保持した回転軸(32)を軸支
すると共に、該回転軸(32)の下部と、該下部と対向
するハウジング(31)壁面に、前記光走査用多面鏡(
35)の外径よりも大きい外径形状を有する軸対向型モ
ータを構成する回転子(38)と固定子(39)を設け
てなることを特徴とする光走査用多面鏡の回転機構。A rotating shaft (32) holding an optical scanning polygon mirror (35) on the upper part is rotated through an upper bearing (33) and a lower bearing (34) arranged in a main bearing housing (31). The optical scanning polygon mirror (
35) A rotation mechanism for a polygon mirror for optical scanning, characterized in that it is provided with a rotor (38) and a stator (39) that constitute an axially opposed motor having an outer diameter larger than the outer diameter of the mirror.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61111698A JPH0756533B2 (en) | 1986-05-14 | 1986-05-14 | Rotation mechanism of polygon mirror for optical scanning |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61111698A JPH0756533B2 (en) | 1986-05-14 | 1986-05-14 | Rotation mechanism of polygon mirror for optical scanning |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62266515A true JPS62266515A (en) | 1987-11-19 |
JPH0756533B2 JPH0756533B2 (en) | 1995-06-14 |
Family
ID=14567888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61111698A Expired - Fee Related JPH0756533B2 (en) | 1986-05-14 | 1986-05-14 | Rotation mechanism of polygon mirror for optical scanning |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0756533B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5438447A (en) * | 1992-09-29 | 1995-08-01 | Fuji Xerox Co., Ltd. | Optical deflector |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60205523A (en) * | 1984-03-30 | 1985-10-17 | Fuji Photo Optical Co Ltd | Scanner |
-
1986
- 1986-05-14 JP JP61111698A patent/JPH0756533B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60205523A (en) * | 1984-03-30 | 1985-10-17 | Fuji Photo Optical Co Ltd | Scanner |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5438447A (en) * | 1992-09-29 | 1995-08-01 | Fuji Xerox Co., Ltd. | Optical deflector |
Also Published As
Publication number | Publication date |
---|---|
JPH0756533B2 (en) | 1995-06-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |