JPH04324414A - Optical scanning device - Google Patents
Optical scanning deviceInfo
- Publication number
- JPH04324414A JPH04324414A JP3095034A JP9503491A JPH04324414A JP H04324414 A JPH04324414 A JP H04324414A JP 3095034 A JP3095034 A JP 3095034A JP 9503491 A JP9503491 A JP 9503491A JP H04324414 A JPH04324414 A JP H04324414A
- Authority
- JP
- Japan
- Prior art keywords
- polygon mirror
- rotating polygon
- light beam
- reflecting surfaces
- optical scanning
- 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 title claims abstract description 19
- 230000010355 oscillation Effects 0.000 claims abstract description 7
- 108091008695 photoreceptors Proteins 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 7
- 230000004075 alteration Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はレーザビームプリンタ等
に用いられる光線を感光体に照射して文字，図形などを
記録する光走査装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical scanning device for recording characters, figures, etc. by irradiating a photoreceptor with a light beam used in a laser beam printer or the like.
【０００２】0002
【従来の技術】近年、文字，図形などを記録する方法と
して、レーザ光線などを用いた光走査装置の利用が多く
なってきている。2. Description of the Related Art In recent years, optical scanning devices using laser beams have been increasingly used as a method for recording characters, figures, etc.
【０００３】このレーザ光線を用いた従来の光走査装置
について、以下図面を用いて説明する。A conventional optical scanning device using this laser beam will be explained below with reference to the drawings.
【０００４】図５は従来の光走査装置の概略斜視図であ
る。また、図６にはその光線の光路の収束のみに注目し
た光路図である。図５，図６に示すように、構成要素と
して１はレーザ光線１２を発振する光源、２はレーザ光
線１２を平行光線に補正するコリメートレンズ、３はレ
ーザ光線１２の口径を真円にする変調器、４はレーザ光
線１２の進行する方向を補正するシリンダレンズ、５は
レーザ光線１２を反射する回転多面鏡、６は回転多面鏡
５で反射したレーザ光線１３−１〜１３−ｎの歪曲収差
を補正するFIG. 5 is a schematic perspective view of a conventional optical scanning device. Further, FIG. 6 is an optical path diagram focusing only on the convergence of the optical path of the light ray. As shown in FIGS. 5 and 6, the constituent elements 1 are a light source that oscillates a laser beam 12, 2 is a collimating lens that corrects the laser beam 12 into a parallel beam, and 3 is a modulation that makes the aperture of the laser beam 12 a perfect circle. 4 is a cylinder lens that corrects the traveling direction of the laser beam 12, 5 is a rotating polygon mirror that reflects the laser beam 12, and 6 is a distortion aberration of the laser beams 13-1 to 13-n reflected by the rotating polygon mirror 5. correct
【０００５】[0005]
【外１】[Outside 1]
【０００６】θレンズ、７は回転多面鏡５の面倒れに起
因するレーザ光線１３−１〜１３−ｎの垂直方向へのぶ
れを補正するシリンダレンズ、８は感光体ドラムである
。２０はレーザ光１３−１を受光して、回転多面鏡５と
感光体ドラム８の位置を同期さすためのフォトセンサで
ある。[0006] A θ lens, 7 a cylinder lens for correcting vertical blurring of the laser beams 13-1 to 13-n caused by the surface tilt of the rotating polygon mirror 5, and 8 a photosensitive drum. A photosensor 20 receives the laser beam 13-1 and synchronizes the positions of the rotating polygon mirror 5 and the photosensitive drum 8.
【０００７】また２１は制御系であり、フォトセンサ２
０からの信号をもとに光源１の発振を制御するものであ
る。Further, 21 is a control system, and the photosensor 2
The oscillation of the light source 1 is controlled based on the signal from the light source 1.
【０００８】つぎに上記の構成要素のお互いの関連動作
を説明する。光源１から放射されたレーザ光は、コリメ
ートレンズ２、変調器３とシリンダレンズ４を透過して
回転多面鏡５に到達する。回転多面鏡５により、光は反
射してNext, the relative operations of the above-mentioned components will be explained. Laser light emitted from a light source 1 passes through a collimator lens 2, a modulator 3, and a cylinder lens 4, and reaches a rotating polygon mirror 5. The light is reflected by the rotating polygon mirror 5.
【０００９】[0009]
【外２】[Outside 2]
【００１０】θレンズ６とシリンダレンズ７を透過して
感光体ドラム８に照射される。このときレーザ光が感光
体ドラム８にどのように走査されるか、図７を用いて簡
単に説明する。The light passes through the θ lens 6 and the cylinder lens 7 and is irradiated onto the photosensitive drum 8. How the laser beam scans the photoreceptor drum 8 at this time will be briefly explained using FIG. 7.
【００１１】同図に示すように、回転多面鏡５に入射す
るレーザ光線１２は、反射して反射光１３−１になる。
そして回転多面鏡５が回転するに連れて反射光１３−２
，反射光１３−３と反射方向が変化し、感光体８上を走
査する。As shown in the figure, a laser beam 12 incident on the rotating polygon mirror 5 is reflected and becomes reflected light 13-1. Then, as the rotating polygon mirror 5 rotates, the reflected light 13-2
, the reflected light 13-3 and the reflected direction change to scan the photoreceptor 8.
【００１２】0012
【発明が解決しようとする課題】しかしながら、この種
の装置のままでは、解像度は一定であり、複数の解像度
を同一の装置で実現することができないという課題があ
る。本発明では、上記従来の課題を解決するもので、複
数の解像度を同一の装置で実現することを目的とする。However, with this type of device, the resolution is constant and there is a problem that a plurality of resolutions cannot be realized with the same device. The present invention is intended to solve the above-mentioned conventional problems, and aims to realize a plurality of resolutions with the same device.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
に、本発明の手段は、光線を発振する光源と、回転多面
鏡を具備し、前記回転多面鏡のすべての反射面を使用す
る場合と、一部の反射面しか使用しない場合の複数の制
御機能を有することを特徴とする。[Means for Solving the Problems] In order to achieve the above object, the means of the present invention includes a light source that oscillates a light beam and a rotating polygon mirror, and uses all the reflecting surfaces of the rotating polygon mirror. It is characterized by having a plurality of control functions when only some of the reflecting surfaces are used.
【００１４】[0014]
【作用】本発明の光走査装置は、光線を発振する光源と
、回転多面鏡を具備し、前記回転多面鏡のすべての反射
面を使用する場合と、一部の反射面しか使用しない場合
の複数の制御機能を有する。よって、同一の装置で異な
る解像度を実現できるため、変化に富んだ画像も容易に
得られることができる。[Operation] The optical scanning device of the present invention is equipped with a light source that oscillates a light beam and a rotating polygon mirror, and can be used in cases where all the reflecting surfaces of the rotating polygon mirror are used and when only some of the reflecting surfaces are used. Has multiple control functions. Therefore, since different resolutions can be achieved with the same device, it is possible to easily obtain a wide variety of images.
【００１５】[0015]
【実施例】以下、本発明の実施例の光走査装置構成につ
いて図１を用いて説明する。光線を発振する光源と、回
転多面鏡を具備し、前記回転多面鏡のすべての反射面を
使用する場合と、一部の反射面しか使用しない場合の複
数の制御が可能な制御回路２４を有する。よって、同一
の装置で異なる解像度を実現できるため、変化に富んだ
画像も容易に得られることができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an optical scanning device according to an embodiment of the present invention will be described below with reference to FIG. It is equipped with a light source that oscillates a light beam and a rotating polygon mirror, and has a control circuit 24 that can perform multiple controls such as when all the reflecting surfaces of the rotating polygon mirror are used and when only some of the reflecting surfaces are used. . Therefore, since different resolutions can be achieved with the same device, it is possible to easily obtain a wide variety of images.
【００１６】更に本発明の詳細について、説明する。回
転多面鏡の反射面数が２の倍数であってもよい。例えば
図２のようにＡ〜Ｌの反射面１２面を有する回転多面鏡
で全面数使用する場合、図３ａのように全反射面に対し
レーザ発振させる。仮にこの解像度が６００ｄｐｉ（ｄ
ｏｔ ｐｅｒ ｉｎｃｈ）の場合、図３ｂのように
６面使用に制御すれば、３００ｄｐｉになり、図３ｃの
ように４面使用に制御すれば、２００ｐｉになり、図３
ｄのように３面使用に制御すれば１５０ｄｐｉになり、
市場でよく使用される解像度が本装置一台のみで可能に
なる。Further details of the present invention will be explained. The number of reflective surfaces of the rotating polygon mirror may be a multiple of two. For example, when using a rotating polygon mirror having 12 reflective surfaces A to L as shown in FIG. 2, the laser oscillates on the total reflection surface as shown in FIG. 3a. If this resolution is 600 dpi (d
ot per inch), if you control to use 6 sides as shown in Figure 3b, it will be 300 dpi, and if you control to use 4 sides as shown in Figure 3c, it will be 200 pi, and as shown in Figure 3
If you control to use 3 sides like d, it will be 150dpi,
Resolutions commonly used in the market can be achieved with just one device.
【００１７】更に本発明の他の実施例について、説明を
する。光源と回転多面鏡の間に配する第一光学系に面倒
れ補正専用のレンズを使用しないこともよい。これはア
ナモフィクコリメートレンズにすれば、面倒れ補正レン
ズと兼用できるため、構成が簡単にできる。Further, other embodiments of the present invention will be explained. It is also good not to use a lens dedicated to surface tilt correction in the first optical system disposed between the light source and the rotating polygon mirror. If you use an anamorphic collimating lens, it can also be used as a tilt correction lens, making the configuration easier.
【００１８】更に本発明の他の実施例について、説明を
する。回転多面鏡と感光体との間に配する第二光学系に
は面倒れ補正レンズしか配置しないのもよい。こうすれ
ば、構成が簡単にできるため、生産性が向上し、価格を
安価にできる。以上のすべて満足した構成を図４に示す
。このように簡潔な構成が可能である。２２はアナモフ
ィックコリメートレンズであり、他の構成物は従来のも
のがそのまま使用できる。また２３は制御系であり、回
転多面鏡５の一部の面数を使用しない制御も可能な回路
２４を含むものである。Further, other embodiments of the present invention will be explained. It is also preferable that only a surface tilt correction lens is disposed in the second optical system disposed between the rotating polygon mirror and the photoreceptor. In this way, the configuration can be simplified, productivity can be improved, and the price can be reduced. A configuration that satisfies all of the above is shown in FIG. In this way, a simple configuration is possible. 22 is an anamorphic collimating lens, and the other components can be used as they are. Reference numeral 23 denotes a control system, which includes a circuit 24 that can perform control without using a part of the number of faces of the rotating polygon mirror 5.
【００１９】[0019]
【発明の効果】本発明の光走査装置は、光線を発振する
光源と、回転多面鏡を具備し、前記回転多面鏡のすべて
の反射面を使用する場合と、一部の反射面しか使用しな
い場合の複数の制御機能を有する。よって、同一の装置
で異なる解像度を実現できるため、変化に富んだ画像も
容易に得られることができる。[Effects of the Invention] The optical scanning device of the present invention includes a light source that oscillates a light beam and a rotating polygon mirror, and uses all the reflecting surfaces of the rotating polygon mirror and uses only some of the reflecting surfaces. With multiple control functions in case. Therefore, since different resolutions can be achieved with the same device, it is possible to easily obtain a wide variety of images.
【図１】本発明の実施例を示す構成図[Fig. 1] A configuration diagram showing an embodiment of the present invention.
【図２】本発明の実施例における回転多面鏡の一例を示
す平面図[Fig. 2] A plan view showing an example of a rotating polygon mirror in an embodiment of the present invention.
【図３】本発明の実施例における回転多面鏡反射面とレ
ーザ発振とのタイミング図[Fig. 3] Timing diagram of the rotating polygon mirror reflection surface and laser oscillation in the embodiment of the present invention
【図４】本発明の他の実施例を示す構成図FIG. 4 is a configuration diagram showing another embodiment of the present invention.
【図５】従来
の装置を示す構成図[Figure 5] Configuration diagram showing a conventional device
【図６】従来の装置における光学原理図[Figure 6] Optical principle diagram of conventional equipment
【図７】従来の
装置における光学原理図[Figure 7] Diagram of optical principles in conventional equipment
１ 光源 ２ コリメートレンズ ３ 変調器 ４ シリンダレンズ ５ 回転多面鏡 ６ 1 Light source 2 Collimating lens 3 Modulator 4 Cylinder lens 5 Rotating polygon mirror 6
【外３】 θレンズ ７ シリンダレンズ ８ 感光体レンズ １２ レーザ光線 ２０ フォトセンサ ２４ 制御回路[Outer 3] θ lens 7 Cylinder lens 8 Photoreceptor lens 12 Laser beam 20 Photo sensor 24 Control circuit
Claims (4)
された光線を反射し特定方向に走査する為の回転多面鏡
を具備し、前記回転多面鏡のすべて又は一部を反射面と
して使用すべく光線発振の制御を行う為の制御回路をそ
なえたことを特徴とする光走査装置。Claim 1: A light source that oscillates a light beam, and a rotating polygon mirror that reflects the light beam oscillated from the light source and scans it in a specific direction, and uses all or part of the rotating polygon mirror as a reflecting surface. An optical scanning device characterized by comprising a control circuit for controlling light beam oscillation.
が２の倍数であることを特徴とする請求項１記載の光走
査装置。2. The optical scanning device according to claim 1, wherein the number of reflection surfaces of the rotating polygon mirror according to claim 1 is a multiple of two.
の数に応じて、レーザの発振出力および発振時間を変化
させることを特徴とする請求項１記載の光走査装置。3. The optical scanning device according to claim 1, wherein the oscillation output and oscillation time of the laser are changed depending on the number of reflective surfaces used.
感光体との間に面倒れ補正の為のレンズを配置すること
を特徴とする請求項１記載の光走査装置。4. The optical scanning device according to claim 1, wherein a lens for surface tilt correction is disposed between the rotating polygon mirror and the photoreceptor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3095034A JPH04324414A (en) | 1991-04-25 | 1991-04-25 | Optical scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3095034A JPH04324414A (en) | 1991-04-25 | 1991-04-25 | Optical scanning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04324414A true JPH04324414A (en) | 1992-11-13 |
Family
ID=14126804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3095034A Pending JPH04324414A (en) | 1991-04-25 | 1991-04-25 | Optical scanning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04324414A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004070312A (en) * | 2002-06-13 | 2004-03-04 | Pentax Corp | Multi-beam scanner |
-
1991
- 1991-04-25 JP JP3095034A patent/JPH04324414A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004070312A (en) * | 2002-06-13 | 2004-03-04 | Pentax Corp | Multi-beam scanner |
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