JPH0451267A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH0451267A JPH0451267A JP16154890A JP16154890A JPH0451267A JP H0451267 A JPH0451267 A JP H0451267A JP 16154890 A JP16154890 A JP 16154890A JP 16154890 A JP16154890 A JP 16154890A JP H0451267 A JPH0451267 A JP H0451267A
- Authority
- JP
- Japan
- Prior art keywords
- laser
- optical system
- scanning optical
- fixing
- light source
- 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 34
- 108091008695 photoreceptors Proteins 0.000 claims description 10
- 238000001514 detection method Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010979 ruby Substances 0.000 description 1
- 229910001750 ruby Inorganic materials 0.000 description 1
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
産皇上又笠亙立互
本考案は、レーザ光線で感光体面を露光するとともに、
レーザ光線を利用して転写像も定着できるようにしたレ
ーザプリンタや複写機等の画像形成装置に関する。[Detailed Description of the Invention] The present invention by Sannojo Mata Kasakami exposes the surface of a photoreceptor with a laser beam, and
The present invention relates to an image forming apparatus such as a laser printer or a copying machine that can also fix a transferred image using a laser beam.
従】ぼり支庸−
この種の画像形成装置としては、次の公報に記載のもの
があった。[Sub]Bori Branch- This type of image forming apparatus was described in the following publication.
■ 特開昭５９−９５５６４号公報
第２図に示すように、レーザ光源１からのレーザ光線を
モータ２によって回転される多面体ミラー３で反射させ
、光路補正用レンズ４を介して転写紙５上を走査し、転
写チャージャ６によって感光体７から転写紙５上に転写
された転写像をレーザ光線の熱エネルギーによって定着
する。■ JP-A No. 59-95564 As shown in Figure 2, a laser beam from a laser light source 1 is reflected by a polyhedral mirror 3 rotated by a motor 2, and is reflected onto a transfer paper 5 via an optical path correction lens 4. is scanned, and the transfer image transferred from the photoreceptor 7 onto the transfer paper 5 by the transfer charger 6 is fixed by the thermal energy of the laser beam.
■ 特開昭６４−８１９７９公報
第３図に示すように、第１のレーザ光源８、第１の集光
レンズ９、第１の回転多面体１０、第２のｆθレンズ１
１．及び同期検知用フォトセンサ１２で構成される画像
書き込み用レーザ走査光学系１３とは全く別に、第２の
レーザ光源１４、第２の集光レンズ１５、第２の回転多
面体１６．及び第２のｆθレンズ１７で構成される定着
用レーザ走査光学系１８を備え１画像書き込み用レーザ
走査光学系１３のレーザ光線のオン・オフ制御から一定
時間遅延して定着用レーザ走査光学系１８のオン・オフ
制御を同様に行い、転写紙１９上のトナーのある部分だ
けレーザ光線を当ててその熱エネルギーによって定着す
る。■ JP-A-64-81979 As shown in FIG. 3, a first laser light source 8, a first condenser lens 9, a first rotating polyhedron 10, and a second fθ lens 1
1. A second laser light source 14, a second condensing lens 15, a second rotating polyhedron 16. and a second f-theta lens 17, the fixing laser scanning optical system 18 is provided with a fixed time delay from the on/off control of the laser beam of the one-image writing laser scanning optical system 13. On/off control is performed in the same manner, and a laser beam is applied to only a certain portion of the toner on the transfer paper 19, and the toner is fixed by its thermal energy.
■ 特開平１−１８８８４号公報
多色画像形成装置等において、熱定着装置の他にレーザ
光線による仮定着装置を備え、熱定着装置の熱エネルギ
ーより小さいエネルギーで仮定着を行う。(1) Japanese Unexamined Patent Publication No. 1-18884 A multicolor image forming apparatus is provided with a temporary fixing device using a laser beam in addition to a thermal fixing device, and temporary fixing is performed using energy smaller than the thermal energy of the thermal fixing device.
が しようとする課
しかし、従来は上記いずれの場合も、画像書き込み用レ
ーザ走査光学系と定着用レーザ走査光学系とはそれぞれ
全く独立した光学構成になっていたため、画像形成装置
が大型になり、またコスト高になっていた。However, in the past, in any of the above cases, the laser scanning optical system for image writing and the laser scanning optical system for fixing had completely independent optical configurations, which resulted in the image forming apparatus becoming larger. Also, the cost was high.
本発明は、このような問題を解決することを目的とする
。The present invention aims to solve such problems.
を するための
本発明は、第１のレーザ光源を有し、該第１のレーザ光
源からのレーザ光線で感光体上を走査して画像を書き込
む画像書き込み用レーザ走査光学系と、第２のレーザ光
源を有し、前記感光体から転写紙上に転写された転写像
を定着するため該第２のレーザ光源からのレーザ光線で
転写紙上を走査する定着用レーザ走査光学系とを備えた
画像形成装置において、画像書き込み用レーザ走査光学
系と定着用レーザ走査光学系とが、一部の光学素子を共
通にして構成されている。The present invention includes a laser scanning optical system for image writing that has a first laser light source and writes an image by scanning a photoreceptor with a laser beam from the first laser light source; An image forming system comprising: a fixing laser scanning optical system having a laser light source and scanning the transfer paper with a laser beam from the second laser light source in order to fix the transferred image transferred from the photoreceptor onto the transfer paper; In the apparatus, a laser scanning optical system for image writing and a laser scanning optical system for fixing are configured using some optical elements in common.
作 用
画像書き込み用レーザ走査光学系と定着用レーザ走査光
学系とは一部の光学素子を共通にしているため、部品点
数を減らして小型化及びコストダウンできる。Function: Since the image writing laser scanning optical system and the fixing laser scanning optical system share some optical elements, the number of parts can be reduced to reduce size and cost.
実施例 次に、本発明の一実施例を図面に従い詳細に説明する。Example Next, one embodiment of the present invention will be described in detail with reference to the drawings.
第１図において、２１は感光体、２２は現像製雪、２３
は転写チャージャ、２４は矢印方向に搬送される転写紙
Ｐを検知する第１の紙センサ、２５は第２の紙センサ、
２６は必要に応じて備える熱定着装置で、これらの構成
は従来と同じである。In FIG. 1, 21 is a photoreceptor, 22 is a developing snowmaker, and 23 is a photoreceptor.
is a transfer charger; 24 is a first paper sensor that detects the transfer paper P conveyed in the direction of the arrow; 25 is a second paper sensor;
Reference numeral 26 denotes a heat fixing device provided as necessary, and the configuration thereof is the same as the conventional one.
この画像形成装置では、画像書き込み用レーザ走査光学
系２７は、第１のレーザ光［２８，第１の集光レンズ２
９、ポリゴンスキャナ３０、第１のｆθレンズ３１及び
同期検知用フォトセンサ３２で構成され、レーザ光源２
８からのレーザ光線ａを集光レンズ２９で集光した後、
ポリゴンスキャナ３０を反射させ、ｆθレンズ３１を介
して感光体２１上を走査する一方、同期検知用フォトセ
ンサ３２で同期信号を取り出すもので、これについては
従来と同様である。In this image forming apparatus, the image writing laser scanning optical system 27 includes a first laser beam [28, a first condensing lens 2
9, consists of a polygon scanner 30, a first fθ lens 31, and a photosensor 32 for synchronization detection, and includes a laser light source 2
After condensing the laser beam a from 8 with a condenser lens 29,
The polygon scanner 30 is reflected and scanned over the photoreceptor 21 via the fθ lens 31, while the synchronization detection photosensor 32 extracts a synchronization signal, which is the same as the conventional method.
ところが、定着用レーザ走査光学系３３は、第２のレー
ザ光源３４、第２の集光レンズ３５．上記ポリゴンスキ
ャナ３０、第２のｆθレンズ３６及び折り返しミラー３
７で構成され、ポリゴンスキャナ３０を画像書き込み用
レーザ走査光学系２７と共通にしている。第２のレーザ
光源３４は定着用のため第１のレーザ光源２８よりも８
力をやや大きくする必要があるので、例えばルビーレー
ザ、ＹＡＧレーザ、ＣＯ２レーザなどを使用する。However, the fixing laser scanning optical system 33 has a second laser light source 34, a second condensing lens 35 . The polygon scanner 30, the second fθ lens 36, and the folding mirror 3
7, and the polygon scanner 30 is used in common with the laser scanning optical system 27 for image writing. The second laser light source 34 is used for fixing, so the second laser light source 34 is 8.
Since it is necessary to increase the force somewhat, a ruby laser, YAG laser, CO2 laser, etc., is used, for example.
このレーザ光源３４からのレーザ光線すは、第１のレー
ザ光源２８からのレーザ光線ａよりやや下側からポリゴ
ンスキャナ３０に照射する。従って。The laser beam a from this laser light source 34 is irradiated onto the polygon scanner 30 from a slightly lower side than the laser beam a from the first laser light source 28. Therefore.
その反射光線はレーザ光線ａの反射光線より高くなるの
で、第２のｆθレンズ３６は第１のｆθレンズ３１より
高い位置に配置し、レーザ光線すの反射光線が感光体２
１の上方を越え、そして折り返しミラー３７で下向きに
偏向されて転写紙Ｐ上を走査するようにする。この走査
光線の熱によって転写紙Ｐ上に転写されたトナーの樹脂
成分が融け、定着される。Since the reflected light beam is higher than the reflected light beam of the laser beam a, the second fθ lens 36 is arranged at a higher position than the first fθ lens 31, so that the reflected light beam of the laser beam
1, and is deflected downward by the folding mirror 37 to scan the transfer paper P. The resin component of the toner transferred onto the transfer paper P is melted and fixed by the heat of this scanning light beam.
なお、定着用のレーザ光線すのスポット径は、書き込み
用のレーザ光線ａのスポット径はどには精細な径は必要
でないから、各部の配置によってはｆθレンズも共通に
できる。すなわち、第１図において第１と第２のｆθレ
ンズ３１・３６とを１つのｆθレンズとし、画像書き込
み用レーザ走査光学系２７は第１の集光レンズ２９と該
ｆθレンズで必要なスポット径が得られ、また定着用レ
ーザ走査光学系３３は第２の集光レンズ３５と該ｆθレ
ンズで必要なスポット径が得られようにすれば良い。Incidentally, since the spot diameter of the laser beam a for fixing and the spot diameter of the laser beam a for writing do not need to be very precise, the fθ lens can be used in common depending on the arrangement of each part. That is, in FIG. 1, the first and second f-theta lenses 31 and 36 are one f-theta lens, and the image writing laser scanning optical system 27 has the first condensing lens 29 and the spot diameter required by the f-theta lens. can be obtained, and the fixing laser scanning optical system 33 may be configured such that the second condenser lens 35 and the fθ lens can obtain the required spot diameter.
月１１１１（榎廟迷−
本発明によれば１画像書き込み用レーザ走査光学系と定
着用レーザ走査光学系とが一部の光学素子を共通にして
いるため、部品点数を減らして／、ｂ型化及びコストダ
ウンが図れる。Month 1111 (Enokimyo Mei) According to the present invention, the laser scanning optical system for writing one image and the laser scanning optical system for fixing use some optical elements in common, reducing the number of parts. and cost reduction.
第１図は、本発明の一実施例の構成斜視図である。第２
図及び第３図は、それぞれ従来例の構成斜視図である。
２１・・・・・・・・・感光体
２７・・・・・・・・画像書き込み用レーザ走査光学系
２８・・・・・・・・・第１のレーザ光源２９・・・・
・・・・・第１の集光レンズ３０・・・・・・・・・ポ
リゴンスキャナ３１・・・・・・・・・第１のｆθレン
ズ３２・・・・・・・・・同期検知用フォトセンサ３３
・・・・・・・・・定着用レーザ走査光学系３４・・・
・・・・・・第２のレーザ光源３５・・・・・・・・・
第２の集光レンズ３６・・・・・・・・・第２のｆθレ
ンズ３７・・・・・・・・・折り返しミラー特 許 出
願 人 株式会社FIG. 1 is a perspective view of an embodiment of the present invention. Second
3 and 3 are perspective views of the configuration of conventional examples, respectively. 21...Photoreceptor 27...Laser scanning optical system for image writing 28...First laser light source 29...
......First condensing lens 30...Polygon scanner 31...First fθ lens 32...Synchronization detection photo sensor 33
...Fixing laser scanning optical system 34...
...Second laser light source 35...
Second condensing lens 36...Second fθ lens 37...Folding mirror Patent applicant Co., Ltd.
Claims (1)
ーザ光線で感光体上を走査して画像を書き込む画像書き
込み用レーザ走査光学系と、第２のレーザ光源を有し、
前記感光体から転写紙上に転写された転写像を定着する
ため該第２のレーザ光源からのレーザ光線で転写紙上を
走査する定着用レーザ走査光学系とを備えた画像形成装
置において、前記画像書き込み用レーザ走査光学系と前
記定着用レーザ走査光学系とが、一部の光学素子を共通
にして構成されていることを特徴とする、画像形成装置
。a laser scanning optical system for image writing that has a first laser light source and writes an image by scanning a photoreceptor with a laser beam from the first laser light source; and a second laser light source;
and a fixing laser scanning optical system that scans the transfer paper with a laser beam from the second laser light source in order to fix the transfer image transferred from the photoreceptor onto the transfer paper, wherein the image writing An image forming apparatus, characterized in that a laser scanning optical system for fixing and a laser scanning optical system for fixing are configured using some optical elements in common.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16154890A JPH0451267A (en) | 1990-06-20 | 1990-06-20 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16154890A JPH0451267A (en) | 1990-06-20 | 1990-06-20 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0451267A true JPH0451267A (en) | 1992-02-19 |
Family
ID=15737203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16154890A Pending JPH0451267A (en) | 1990-06-20 | 1990-06-20 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0451267A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5459561A (en) * | 1993-10-06 | 1995-10-17 | Hewlett-Packard Company | Method and apparatus for fusing toner into a print medium |
| JP2010217731A (en) * | 2009-03-18 | 2010-09-30 | Sharp Corp | Fixing device and image forming apparatus including the same |
| EP2107430A3 (en) * | 2008-04-01 | 2010-10-06 | Ricoh Company, Ltd. | Image forming apparatus |
-
1990
- 1990-06-20 JP JP16154890A patent/JPH0451267A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5459561A (en) * | 1993-10-06 | 1995-10-17 | Hewlett-Packard Company | Method and apparatus for fusing toner into a print medium |
| EP2107430A3 (en) * | 2008-04-01 | 2010-10-06 | Ricoh Company, Ltd. | Image forming apparatus |
| US8213848B2 (en) | 2008-04-01 | 2012-07-03 | Ricoh Company, Ltd. | Image forming apparatus including a fixing device configured to apply heat and method thereof |
| JP2010217731A (en) * | 2009-03-18 | 2010-09-30 | Sharp Corp | Fixing device and image forming apparatus including the same |
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