JP2000131634A - Optical scanner - Google Patents
Optical scannerInfo
- Publication number
- JP2000131634A JP2000131634A JP10321562A JP32156298A JP2000131634A JP 2000131634 A JP2000131634 A JP 2000131634A JP 10321562 A JP10321562 A JP 10321562A JP 32156298 A JP32156298 A JP 32156298A JP 2000131634 A JP2000131634 A JP 2000131634A
- Authority
- JP
- Japan
- Prior art keywords
- light
- receiving element
- regulating member
- scanning device
- light beam
- 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
Landscapes
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、レーザビームプリ
ンタ、デジタル複写機、普通紙ファクシミリなどに用い
られ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 used for a laser beam printer, a digital copying machine, a plain paper facsimile, and the like.
【０００２】[0002]
【従来の技術】プリンタ、デジタル複写機などの画像形
成装置においては、光走査装置により感光体上に画像情
報の光書き込みを行って静電潜像を形成し、この静電潜
像をトナーで現像してトナー像を得るようにしている。
光走査装置は、半導体レーザ、光偏向器（ポリゴンミラ
ー）、走査レンズ系などを備えており、半導体レーザか
ら画像情報に応じて変調されたレーザビームが出射さ
れ、このレーザビームが光偏向器で反射され、走査レン
ズにより感光体面に結像される。光偏向器は超高速回転
しており、これによりレーザビームは、感光体の主走査
方向に走査される。また、光走査装置は、半導体レーザ
から出射され、光偏向器で反射されたレーザビームを受
光するための受光素子を備えており、受光素子の受光タ
イミングに基づいてレーザビームの光書き込み開始位置
を決めている。2. Description of the Related Art In an image forming apparatus such as a printer or a digital copying machine, an optical scanning device performs optical writing of image information on a photoreceptor to form an electrostatic latent image, and the electrostatic latent image is formed with toner. Development is performed to obtain a toner image.
The optical scanning device includes a semiconductor laser, an optical deflector (polygon mirror), a scanning lens system, and the like. A laser beam modulated according to image information is emitted from the semiconductor laser, and the laser beam is emitted by the optical deflector. The light is reflected and imaged on the surface of the photoreceptor by the scanning lens. The optical deflector rotates at a very high speed, whereby the laser beam scans the photoconductor in the main scanning direction. Further, the optical scanning device includes a light receiving element for receiving the laser beam emitted from the semiconductor laser and reflected by the optical deflector, and based on the light receiving timing of the light receiving element, sets the light writing start position of the laser beam. I have decided.
【０００３】ここで特許第２６０７６４５号には、１つ
のレーザ光出力素子と受光素子とを同一の基板に配する
光走査装置が提案されている。Here, Japanese Patent No. 2607645 proposes an optical scanning device in which one laser light output element and one light receiving element are arranged on the same substrate.
【０００４】[0004]
【発明が解決しようとする課題】図９は従来例の不具合
を説明するための図である。半導体レーザ１と受光素子
（フォトダイオード等）８は、同一の回路基板１０上に
搭載されている。符号２は、半導体レーザ１からの光束
をカップリングし、平行光束または収束光束または発散
光束に変換するカップリングレンズである。また、符号
７は、受光素子８に焦点を結ぶための同期用レンズであ
る。受光素子８は、そのエッジ部をレーザビームの光束
が過ぎ、受光量があるスレッシュレベルを越えると、信
号として検知する。そして、信号検出から一定時間後に
レーザビームの書き出しを開始する。FIG. 9 is a diagram for explaining a problem of the conventional example. The semiconductor laser 1 and the light receiving element (such as a photodiode) 8 are mounted on the same circuit board 10. Reference numeral 2 denotes a coupling lens that couples a light beam from the semiconductor laser 1 and converts the light beam into a parallel light beam, a convergent light beam, or a divergent light beam. Reference numeral 7 denotes a synchronization lens for focusing on the light receiving element 8. The light receiving element 8 detects as a signal when the light beam of the laser beam passes through the edge portion and the amount of received light exceeds a certain threshold level. Then, the writing of the laser beam is started a fixed time after the signal detection.
【０００５】ところで、被走査面上でビームスポット径
等の光学特性を良好にするためには、半導体レーザ１の
位置決めを高精度に行う必要がある。ところが、基板１
０への各素子の実装精度は満足いくものでは無いため、
図９に示すように、受光素子８が光束を検知する位置Ｓ
が主走査方向にΔだけずれてしまい、書き出し開始位置
が主走査方向にずれてしまう。Incidentally, in order to improve the optical characteristics such as the beam spot diameter on the surface to be scanned, it is necessary to position the semiconductor laser 1 with high accuracy. However, substrate 1
Since the mounting accuracy of each element to 0 is not satisfactory,
As shown in FIG. 9, the position S at which the light receiving element 8 detects the light flux is shown.
Are shifted by Δ in the main scanning direction, and the writing start position is shifted in the main scanning direction.
【０００６】本発明は、回路基板の部品点数を低減し、
かつレーザビームの書き出し位置の誤差を低減すること
が出来る光走査装置を提供することを目的とするもので
ある。The present invention reduces the number of components on a circuit board,
It is another object of the present invention to provide an optical scanning device capable of reducing an error in a writing position of a laser beam.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、請求項１記載の発明は、光源と、光源からの光束を
等角速度的に偏向する偏向器と、偏向された複数の光束
を被走査面に向けて集光させ、被走査面を略等速度的に
走査する走査光学系と、光源と同一基板に取り付けら
れ、偏向器からの光束を受光する受光素子と、受光素子
に入る光束を規制する光束規制部材と、を備えたことを
特徴とするものである。In order to achieve the above object, the invention according to claim 1 comprises a light source, a deflector for deflecting a light beam from the light source at a constant angular velocity, and a plurality of deflected light beams. A scanning optical system that condenses light toward the surface to be scanned and scans the surface to be scanned at a substantially constant speed, a light receiving element that is attached to the same substrate as the light source and receives a light beam from the deflector, and enters the light receiving element A light beam regulating member for regulating a light beam.
【０００８】また上記目的を達成するために、請求項２
記載の発明は、請求項１記載において、光源を固定する
ホルダを設け、光束規制部材は、このホルダに一体的に
形成されることを特徴とするものである。[0008] In order to achieve the above object, a second aspect is provided.
According to the invention described in the first aspect, a holder for fixing the light source is provided, and the light flux regulating member is formed integrally with the holder.
【０００９】また上記目的を達成するために、請求項３
記載の発明は、請求項１記載において、偏向器及び走査
光学系を固定するハウジングを設け、光束規制部材は、
このハウジングに一体的に形成されることを特徴とする
ものである。In order to achieve the above object, a third aspect of the present invention is provided.
In the invention described in claim 1, a housing for fixing the deflector and the scanning optical system is provided, and the light flux regulating member is
It is characterized by being formed integrally with this housing.
【００１０】また上記目的を達成するために、請求項４
記載の発明は、請求項１記載において、光束規制部材
は、位置調整可能に構成されていることを特徴とするも
のである。[0010] In order to achieve the above object, the present invention relates to claim 4.
The invention described in the first aspect is characterized in that the light flux regulating member is configured to be adjustable in position.
【００１１】また上記目的を達成するために、請求項５
記載の発明は、請求項１ないし請求項４の何れか記載に
おいて、受光素子に向かう光束は、光束規制部材の近傍
で主走査方向に集光していることを特徴とするものであ
る。According to another aspect of the present invention, the above object is achieved.
The invention described in any one of claims 1 to 4 is characterized in that the light beam directed to the light receiving element is converged in the main scanning direction near the light beam regulating member.
【００１２】また上記目的を達成するために、請求項６
記載の発明は、請求項１ないし請求項４の何れか記載に
おいて、光束規制部材と、偏向器の偏向面を副走査方向
に略共役の関係とすることを特徴とするものである。According to another aspect of the present invention, there is provided an electronic apparatus comprising:
The invention described in any one of claims 1 to 4 is characterized in that the light beam regulating member and the deflection surface of the deflector have a substantially conjugate relationship in the sub-scanning direction.
【００１３】また上記目的を達成するために、請求項７
記載の発明は、請求項１ないし請求項６の何れか記載に
おいて、光束規制部材は、スリットまたはナイフエッジ
形状をしていることを特徴とするものである。According to another aspect of the present invention, there is provided a computer system comprising:
The invention described in any one of claims 1 to 6 is characterized in that the light beam regulating member has a slit or a knife edge shape.
【００１４】また上記目的を達成するために、請求項８
記載の発明は、複数の光源と、複数の光源からの光束を
等角速度的に偏向する偏向器と、偏向された複数の光束
を被走査面に向けて集光させ、被走査面を略等速度的に
走査する走査光学系と、偏向器からの光束を受光する受
光素子と、を備え、複数の光源のうち少なくとも２つ
と、受光素子とが同一基板に取り付けられていることを
特徴とするものである。According to another aspect of the present invention, the above object is achieved.
The described invention provides a plurality of light sources, a deflector that deflects light beams from the plurality of light sources at a uniform angular velocity, and condenses the plurality of deflected light beams toward a surface to be scanned, thereby substantially equalizing the surface to be scanned. A scanning optical system that scans at a high speed; and a light receiving element that receives a light beam from the deflector, wherein at least two of the plurality of light sources and the light receiving element are mounted on the same substrate. Things.
【００１５】また上記目的を達成するために、請求項９
記載の発明は、請求項８記載において、受光素子は複数
の光源と走査光学系の間にあり、受光素子と、受光素子
に最も近い光源の主走査方向に射影した距離は、主走査
両端に位置する光源間の主走査方向に射影した距離より
も長いことを特徴とするものである。According to another aspect of the present invention, there is provided a computer system comprising:
According to the invention described in claim 8, in claim 8, the light receiving element is between the plurality of light sources and the scanning optical system, and the distance of the light receiving element and the light source closest to the light receiving element projected in the main scanning direction is at both ends of the main scanning. It is characterized by being longer than the distance projected in the main scanning direction between the located light sources.
【００１６】また上記目的を達成するために、請求項１
０記載の発明は、請求項８または請求項９記載におい
て、受光素子に入る光束を規制する光束規制部材を設け
たことを特徴とするものである。According to another aspect of the present invention, there is provided a computer system comprising:
The invention described in claim 0 is characterized in that, in claim 8 or claim 9, a light beam regulating member for regulating a light beam entering the light receiving element is provided.
【００１７】また上記目的を達成するために、請求項１
１記載の発明は、請求項１０記載において、複数の光源
を固定するホルダを設け、光束規制部材は、このホルダ
に一体的に形成されることを特徴とするものである。According to another aspect of the present invention, there is provided a computer system comprising:
According to a first aspect of the present invention, in the tenth aspect, a holder for fixing a plurality of light sources is provided, and the light beam regulating member is formed integrally with the holder.
【００１８】また上記目的を達成するために、請求項１
２記載の発明は、請求項１０記載において、偏向器及び
走査光学系を固定するハウジングを設け、光束規制部材
は、このハウジングに一体的に形成されることを特徴と
するものである。According to another aspect of the present invention, there is provided a computer system comprising:
According to a second aspect of the present invention, in the tenth aspect, a housing for fixing the deflector and the scanning optical system is provided, and the light beam regulating member is formed integrally with the housing.
【００１９】また上記目的を達成するために、請求項１
３記載の発明は、請求項１０記載において、光束規制部
材は、位置調整可能に構成されていることを特徴とする
ものである。Further, in order to achieve the above object, the present invention provides the first aspect.
According to a third aspect of the present invention, in the tenth aspect, the light flux regulating member is configured to be position-adjustable.
【００２０】また上記目的を達成するために、請求項１
４記載の発明は、請求項１０ないし請求項１２の何れか
記載において、受光素子に向かう複数の光束は、光束規
制部材の近傍で主走査方向に集光していることを特徴と
するものである。Further, in order to achieve the above object, the present invention provides the first aspect.
According to a fourth aspect of the present invention, in any one of the tenth to twelfth aspects, the plurality of light beams directed to the light receiving element are focused in the main scanning direction near the light beam regulating member. is there.
【００２１】また上記目的を達成するために、請求項１
５記載の発明は、請求項１０ないし請求項１２の何れか
記載において、光束規制部材と、偏向器の偏向面を副走
査方向に略共役の関係とすることを特徴とするものであ
る。According to another aspect of the present invention, there is provided a semiconductor device comprising:
According to a fifth aspect of the present invention, in any one of the tenth to twelfth aspects, the light beam regulating member and the deflecting surface of the deflector have a substantially conjugate relationship in the sub-scanning direction.
【００２２】また上記目的を達成するために、請求項１
６記載の発明は、請求項１０ないし請求項１５の何れか
記載において、光束規制部材は、スリットまたはナイフ
エッジ形状をしていることを特徴とするものである。According to another aspect of the present invention, there is provided a computer system comprising:
According to a sixth aspect of the present invention, in any one of the tenth to fifteenth aspects, the light flux regulating member has a slit or a knife edge shape.
【００２３】[0023]
【発明の実施の形態】以下、本発明の実施の形態を添付
図面に従って説明する。図１は第１の実施形態を示す光
走査装置の構成図である。半導体レーザ１と受光素子８
は、同一の回路基板１０上に搭載されている。偏向器４
と半導体レーザ１の間には、カップリングレンズ２、ア
パーチャ９、シリンダレンズ３がある。シリンダレンズ
３は、被走査面（感光体面）６の副走査方向にのみパワ
ーを有し、偏向器４近傍で主走査方向に長い線像に結像
させる。偏向器４と被走査面６の間には走査レンズ系５
がある。また偏向器４と受光素子８の間には同期用レン
ズ７がある。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of the optical scanning device according to the first embodiment. Semiconductor laser 1 and light receiving element 8
Are mounted on the same circuit board 10. Deflector 4
A coupling lens 2, an aperture 9, and a cylinder lens 3 are provided between the semiconductor laser 1. The cylinder lens 3 has power only in the sub-scanning direction of the surface to be scanned (photoconductor surface) 6, and forms a linear image long in the main scanning direction near the deflector 4. A scanning lens system 5 is provided between the deflector 4 and the surface 6 to be scanned.
There is. There is a synchronization lens 7 between the deflector 4 and the light receiving element 8.
【００２４】半導体レーザ１から出射される変調レーザ
ビームは、矢印方向に高速回転する偏向器４によって、
走査レンズ系５を通して被走査面６を主走査方向に走査
される。また、レーザビームは、受光素子８に入射さ
れ、受光素子８の信号に基づいてレーザ書き出し位置が
決められる。The modulated laser beam emitted from the semiconductor laser 1 is deflected by a deflector 4 rotating at high speed in the direction of the arrow.
The scanning surface 6 is scanned in the main scanning direction through the scanning lens system 5. The laser beam is incident on the light receiving element 8, and a laser writing position is determined based on a signal from the light receiving element 8.
【００２５】本実施形態では、受光素子８に入る光束を
規制する光束規制部材としてのエッジ１２を、半導体レ
ーザ１を保持するホルダ１１と一体的に設けている。こ
のようにエッジ１２を設けることで、受光素子８が光束
を検知する位置が主走査方向にずれないので、書き出し
開始位置のずれが無くなり、高精度な光走査装置を提供
できる。In the present embodiment, the edge 12 as a light beam regulating member for regulating the light beam entering the light receiving element 8 is provided integrally with the holder 11 holding the semiconductor laser 1. By providing the edge 12 in this manner, the position at which the light receiving element 8 detects the light beam does not shift in the main scanning direction, so that the writing start position does not shift, and a highly accurate optical scanning device can be provided.
【００２６】図２は第２の実施形態を示す光走査装置の
構成図である。本実施形態では、エッジ１２は、光走査
装置の各ユニットを収容し固定するハウジング１３と一
体的に設けられている。受光素子８に入る光束を規制す
る機能は、図１の場合と同じである。FIG. 2 is a configuration diagram of an optical scanning device according to a second embodiment. In the present embodiment, the edge 12 is provided integrally with a housing 13 that houses and fixes each unit of the optical scanning device. The function of regulating the light flux entering the light receiving element 8 is the same as that in the case of FIG.
【００２７】図３は第３の実施形態を示す光走査装置の
構成図である。本実施形態では、エッジ１２を主走査方
向に移動調整可能に設けている。このエッジ１２を、主
走査方向に移動調整し、その後固定することにより、さ
らに書き出し開始位置の誤差を低減している。FIG. 3 is a configuration diagram of an optical scanning device according to a third embodiment. In the present embodiment, the edge 12 is provided so as to be movable in the main scanning direction. By moving and adjusting the edge 12 in the main scanning direction and then fixing the edge 12, the error of the writing start position is further reduced.
【００２８】図４はエッジ部における主走査ビーム径を
比較して示す図であり、（ａ）は主走査ビーム１４の径
（主走査方向；図の左右方向）が小さい場合を示し、
（ｂ）は大きい場合を示す。図４（ｂ）に示すように、
主走査ビーム径が大きいと、受光素子８が受ける光量が
スレッシュレベルに到達するときのビーム位置はばらつ
くが、図４（ａ）に示すように、主走査ビーム径が小さ
いと、受光素子８が受ける光量がスレッシュレベルに到
達するときのビーム位置のばらつきは小さい。FIGS. 4A and 4B are diagrams showing a comparison of the main scanning beam diameter at the edge portion. FIG. 4A shows a case where the diameter of the main scanning beam 14 (main scanning direction; left-right direction in the figure) is small.
(B) shows the case where it is large. As shown in FIG.
When the main scanning beam diameter is large, the beam position when the amount of light received by the light receiving element 8 reaches the threshold level varies, but as shown in FIG. The variation in beam position when the amount of light received reaches the threshold level is small.
【００２９】図５はエッジ部が副走査方向に傾いたとき
の主走査ビーム位置のずれを示す図である。エッジ部１
２は、組み付け誤差や加工誤差により副走査方向に対し
て傾く可能性がある。図５に示すように、エッジ部１２
が副走査方向にΔθ傾く場合、主走査ビーム１４の位置
が１４ａと１４ｂで示すようにずれてしまう。そうなる
と、書き出し位置がずれる。ところが、エッジ部１２
と、偏向器４の偏向面が副走査方向に略共役の関係にな
っていると、副走査方向のビーム位置ずれが小さくな
り、書き出し開始位置のずれが小さくなる。略共役にす
るためには、同期用レンズ７の副走査方向に正のパワー
を持たせるか、走査光学系を通過させればよい。FIG. 5 is a diagram showing the shift of the main scanning beam position when the edge is inclined in the sub-scanning direction. Edge part 1
No. 2 may be inclined with respect to the sub-scanning direction due to an assembly error or a processing error. As shown in FIG.
Is tilted by Δθ in the sub-scanning direction, the position of the main scanning beam 14 is shifted as shown by 14a and 14b. In that case, the writing position shifts. However, the edge portion 12
When the deflecting surface of the deflector 4 has a substantially conjugate relationship in the sub-scanning direction, the beam position shift in the sub-scanning direction decreases, and the shift of the writing start position decreases. In order to make the lens substantially conjugate, the synchronizing lens 7 may have a positive power in the sub-scanning direction or may pass through the scanning optical system.
【００３０】図６は第４の実施形態を示す光走査装置の
構成図である。本実施形態は、複数の半導体レーザ１
ａ，１ｂと、受光素子８とを同一の回路基板１０上に搭
載し、制御回路を接続するためのコネクタや配線を低減
し、また、ノイズ対策としてシールド線等の高コストの
ケーブルを使用する必要を無くし、回路基板の部品点数
を低減するようにしたものである。また、ホルダ１１に
はエッジ部１２が一体形成されている。また、受光素子
８に向かう光束と、書き込み開始位置に向かう光束とが
なす角θは出来るだけ小さい方がよい。そのためには、
受光素子８は半導体レーザ１から主走査方向に出来るだ
け離れた方がよく、受光素子８に近い側の半導体レーザ
１ｂと受光素子８の主走査方向に射影した距離は、半導
体レーザ１ａと１ｂの主走査方向に射影した距離よりも
離れている。その結果、書き出し開始位置の誤差が小さ
い光走査装置を提供できる。FIG. 6 is a configuration diagram of an optical scanning device according to a fourth embodiment. In the present embodiment, a plurality of semiconductor lasers 1
a, 1b and the light receiving element 8 are mounted on the same circuit board 10 to reduce the number of connectors and wiring for connecting the control circuit, and use a high-cost cable such as a shielded wire as a measure against noise. This eliminates the necessity and reduces the number of components on the circuit board. The holder 11 is integrally formed with an edge portion 12. It is preferable that the angle θ formed by the light beam toward the light receiving element 8 and the light beam toward the writing start position is as small as possible. for that purpose,
It is better that the light receiving element 8 is as far as possible in the main scanning direction from the semiconductor laser 1. The distance between the semiconductor laser 1b closer to the light receiving element 8 and the light receiving element 8 projected in the main scanning direction is the distance between the semiconductor lasers 1a and 1b. It is farther than the distance projected in the main scanning direction. As a result, it is possible to provide an optical scanning device having a small error in the writing start position.
【００３１】図７は第５の実施形態を示す光走査装置の
構成図である。図６に示す第４の実施形態と同様に、複
数の半導体レーザ１ａ，１ｂを設けており、エッジ部１
２はハウジング１３に一体形成されている。FIG. 7 is a configuration diagram of an optical scanning device according to a fifth embodiment. As in the fourth embodiment shown in FIG. 6, a plurality of semiconductor lasers 1a and 1b
2 is formed integrally with the housing 13.
【００３２】図８は第６の実施形態を示す光走査装置の
構成図である。図６、図７に示す第４、第５の実施形態
と同様に、複数の半導体レーザ１ａ，１ｂを設けてお
り、エッジ部１２は主走査方向に移動調整可能に設けら
れている。図６ないし図８に示す型式の光走査装置にお
いても、主走査ビーム径を小さくして受光素子８が受け
る光量が、スレッシュレベルに到達するときのビーム位
置のばらつきを抑える配慮がなされている。また、エッ
ジ部１２と偏向器４の偏向面を副走査方向に略共役の関
係にすることも行われる。なお、上記第１ないし第６の
実施形態において、受光素子８への光束規制部材として
エッジ部１２で説明したが、スリットでもよいし、また
それ以外の形状でも、要は同じ機能を果たすものであれ
ば差し支えない。FIG. 8 is a configuration diagram of an optical scanning device according to a sixth embodiment. As in the fourth and fifth embodiments shown in FIGS. 6 and 7, a plurality of semiconductor lasers 1a and 1b are provided, and the edge portion 12 is provided so as to be movable in the main scanning direction. Also in the optical scanning devices of the types shown in FIGS. 6 to 8, consideration is given to reducing the main scanning beam diameter to suppress variations in the beam position when the amount of light received by the light receiving element 8 reaches a threshold level. Further, the edge portion 12 and the deflecting surface of the deflector 4 may have a substantially conjugate relationship in the sub-scanning direction. In the first to sixth embodiments, the edge portion 12 has been described as a light flux regulating member for the light receiving element 8, but a slit or other shape may serve the same function. Anything is fine.
【００３３】[0033]
【発明の効果】請求項１ないし請求項７記載の発明によ
れば、光源と受光素子を同一基板に取り付けることで回
路基板の部品点数を低減しつつ、光束規制部材により、
書き出し開始位置の誤差が小さい光走査装置を提供でき
る。According to the first to seventh aspects of the present invention, the light source and the light receiving element are mounted on the same substrate to reduce the number of parts on the circuit board, and the light flux regulating member allows
An optical scanning device with a small error in the writing start position can be provided.
【００３４】請求項２及び請求項３記載の発明によれ
ば、光束規制部材を独立して設ける場合に比べて構成の
簡素化を図ることができる。According to the second and third aspects of the present invention, the structure can be simplified as compared with the case where the light beam regulating member is provided independently.
【００３５】請求項４ないし請求項６記載の発明によれ
ば、さらに書き出し開始位置の信頼性を高めることがで
きる。According to the present invention, the reliability of the writing start position can be further improved.
【００３６】請求項８記載の発明によれば、複数光源と
受光素子を同一基板に取り付けることにより、制御回路
を接続するためのコネクタや配線を低減でき、ノイズ対
策としてシールド線等の高コストのケーブルを使用する
必要が無くなり、回路基板の部品点数を低減することが
でき、コストダウンが実現できる。According to the eighth aspect of the present invention, by mounting the plurality of light sources and the light receiving elements on the same substrate, the number of connectors and wiring for connecting the control circuit can be reduced. It is not necessary to use a cable, the number of components on the circuit board can be reduced, and the cost can be reduced.
【００３７】請求項９ないし請求項１６記載の発明によ
れば、光束規制部材により、書き出し開始位置の誤差が
小さい光走査装置を提供できる。According to the ninth to sixteenth aspects of the present invention, it is possible to provide an optical scanning device in which the error of the writing start position is small by the light beam regulating member.
【００３８】請求項１１及び請求項１２記載の発明によ
れば、光束規制部材を独立して設ける場合に比べて構成
の簡素化を図ることができる。According to the eleventh and twelfth aspects of the invention, the structure can be simplified as compared with the case where the light flux regulating member is provided independently.
【００３９】請求項１３ないし請求項１５記載の発明に
よれば、さらに書き出し開始位置の信頼性を高めること
ができる。According to the thirteenth to fifteenth aspects, the reliability of the write start position can be further improved.
【図１】本発明の第１の実施形態を示す光走査装置の構
成図である。FIG. 1 is a configuration diagram of an optical scanning device according to a first embodiment of the present invention.
【図２】本発明の第２の実施形態を示す光走査装置の構
成図である。FIG. 2 is a configuration diagram of an optical scanning device according to a second embodiment of the present invention.
【図３】本発明の第３の実施形態を示す光走査装置の構
成図である。FIG. 3 is a configuration diagram of an optical scanning device according to a third embodiment of the present invention.
【図４】エッジ部における主走査ビーム径を比較して示
す図である。FIG. 4 is a diagram showing a comparison of a main scanning beam diameter at an edge portion.
【図５】エッジ部が副走査方向に傾いたときの主走査ビ
ーム位置のずれを示す図である。FIG. 5 is a diagram illustrating a shift of a main scanning beam position when an edge portion is inclined in a sub-scanning direction.
【図６】本発明の第４の実施形態を示す光走査装置の構
成図である。FIG. 6 is a configuration diagram of an optical scanning device according to a fourth embodiment of the present invention.
【図７】本発明の第５の実施形態を示す光走査装置の構
成図である。FIG. 7 is a configuration diagram of an optical scanning device according to a fifth embodiment of the present invention.
【図８】本発明の第６の実施形態を示す光走査装置の構
成図である。FIG. 8 is a configuration diagram of an optical scanning device according to a sixth embodiment of the present invention.
【図９】従来例の不具合を説明するための図である。FIG. 9 is a diagram for explaining a problem of the conventional example.
１ 半導体レーザ ２ カップリングレンズ ３ シリンダレンズ ４ 偏向器 ５ 走査レンズ系 ６ 被走査面 ７ 同期用レンズ ８ 受光素子 ９ アパーチャ １０ 回路基板 １１ ホルダ １２ エッジ部 １３ ハウジング DESCRIPTION OF SYMBOLS 1 Semiconductor laser 2 Coupling lens 3 Cylinder lens 4 Deflector 5 Scanning lens system 6 Scanning surface 7 Synchronization lens 8 Light receiving element 9 Aperture 10 Circuit board 11 Holder 12 Edge part 13 Housing
Claims (16)
走査面を略等速度的に走査する走査光学系と、 光源と同一基板に取り付けられ、偏向器からの光束を受
光する受光素子と、 受光素子に入る光束を規制する光束規制部材と、 を備えたことを特徴とする光走査装置。A light source; a deflector for deflecting a light beam from the light source at a uniform angular velocity; A scanning optical system, a light receiving element attached to the same substrate as the light source and receiving a light beam from the deflector, and a light beam regulating member for regulating the light beam entering the light receiving element. .
ルダに一体的に形成されることを特徴とする光走査装
置。2. The optical scanning device according to claim 1, wherein a holder for fixing the light source is provided, and the light beam regulating member is formed integrally with the holder.
束規制部材は、このハウジングに一体的に形成されるこ
とを特徴とする光走査装置。3. The optical scanning device according to claim 1, wherein a housing for fixing the deflector and the scanning optical system is provided, and the light flux regulating member is formed integrally with the housing.
特徴とする光走査装置。4. The optical scanning device according to claim 1, wherein the light flux regulating member is configured to be adjustable in position.
おいて、 受光素子に向かう光束は、光束規制部材の近傍で主走査
方向に集光していることを特徴とする光走査装置。5. The optical scanning device according to claim 1, wherein the light beam directed to the light receiving element is converged in the main scanning direction near the light beam regulating member.
おいて、 光束規制部材と、偏向器の偏向面を副走査方向に略共役
の関係とすることを特徴とする光走査装置。6. The optical scanning device according to claim 1, wherein the light beam regulating member and the deflection surface of the deflector have a substantially conjugate relationship in the sub-scanning direction.
おいて、 光束規制部材は、スリットまたはナイフエッジ形状をし
ていることを特徴とする光走査装置。7. The optical scanning device according to claim 1, wherein the light flux regulating member has a slit or a knife-edge shape.
と、 偏向された複数の光束を被走査面に向けて集光させ、被
走査面を略等速度的に走査する走査光学系と、 偏向器からの光束を受光する受光素子と、 を備え、 複数の光源のうち少なくとも２つと、受光素子とが同一
基板に取り付けられていることを特徴とする光走査装
置。8. A plurality of light sources, a deflector for deflecting light beams from the plurality of light sources at a uniform angular velocity, and condensing the plurality of deflected light beams toward a surface to be scanned to substantially equalize the surface to be scanned. A scanning optical system that scans at a high speed, and a light receiving element that receives a light beam from the deflector, wherein at least two of the plurality of light sources and the light receiving element are mounted on the same substrate. Optical scanning device.
子と、受光素子に最も近い光源の主走査方向に射影した
距離は、主走査両端に位置する光源間の主走査方向に射
影した距離よりも長いことを特徴とする光走査装置。9. The light-receiving element according to claim 8, wherein the light-receiving element is located between the plurality of light sources and the scanning optical system, and the distance of the light-receiving element and the light source closest to the light-receiving element projected in the main scanning direction is at both ends of the main scanning. An optical scanning device wherein the distance between the light sources located in the main scanning direction is longer than the distance projected in the main scanning direction.
て、 受光素子に入る光束を規制する光束規制部材を設けたこ
とを特徴とする光走査装置。10. An optical scanning device according to claim 8, further comprising a light beam regulating member for regulating a light beam entering the light receiving element.
このホルダに一体的に形成されることを特徴とする光走
査装置。11. The device according to claim 10, further comprising: a holder for fixing the plurality of light sources;
An optical scanning device formed integrally with the holder.
束規制部材は、このハウジングに一体的に形成されるこ
とを特徴とする光走査装置。12. An optical scanning device according to claim 10, wherein a housing for fixing the deflector and the scanning optical system is provided, and the light beam regulating member is formed integrally with the housing.
特徴とする光走査装置。13. The optical scanning device according to claim 10, wherein the light flux regulating member is configured to be adjustable in position.
記載において、 受光素子に向かう複数の光束は、光束規制部材の近傍で
主走査方向に集光していることを特徴とする光走査装
置。14. The optical scanning device according to claim 10, wherein the plurality of light beams traveling toward the light receiving element are converged in the main scanning direction near the light beam regulating member. .
記載において、 光束規制部材と、偏向器の偏向面を副走査方向に略共役
の関係とすることを特徴とする光走査装置。15. The optical scanning device according to claim 10, wherein the light beam regulating member and the deflection surface of the deflector have a substantially conjugate relationship in the sub-scanning direction.
記載において、 光束規制部材は、スリットまたはナイフエッジ形状をし
ていることを特徴とする光走査装置。16. The optical scanning device according to claim 10, wherein the light flux regulating member has a slit or a knife edge shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32156298A JP4024952B2 (en) | 1998-10-27 | 1998-10-27 | Optical scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32156298A JP4024952B2 (en) | 1998-10-27 | 1998-10-27 | Optical scanning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000131634A true JP2000131634A (en) | 2000-05-12 |
| JP4024952B2 JP4024952B2 (en) | 2007-12-19 |
Family
ID=18133964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32156298A Expired - Fee Related JP4024952B2 (en) | 1998-10-27 | 1998-10-27 | Optical scanning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4024952B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003043388A (en) * | 2001-07-31 | 2003-02-13 | Canon Inc | Scanning optical device and imaging apparatus using the same |
| JP2003075750A (en) * | 2001-09-07 | 2003-03-12 | Canon Inc | Scanning optical device and image forming device using the same |
| EP1517539A2 (en) * | 1999-03-12 | 2005-03-23 | Canon Kabushiki Kaisha | Multibeam scanning optical apparatus and color image-forming apparatus |
| US6969846B2 (en) | 2002-02-28 | 2005-11-29 | Canon Kabushiki Kaisha | Light source unit and scanning optical apparatus using the same |
| US7154640B2 (en) | 2001-10-01 | 2006-12-26 | Canon Kabushiki Kaisha | Multi-beam scanning apparatus and image forming apparatus using the same |
| JP2007286631A (en) * | 2007-05-28 | 2007-11-01 | Ricoh Co Ltd | Optical scanner and image-forming apparatus using same |
| US7321380B2 (en) | 2003-03-07 | 2008-01-22 | Canon Kabushiki Kaisha | Laser emitter and laser scanning device |
| JP2008309924A (en) * | 2007-06-13 | 2008-12-25 | Konica Minolta Business Technologies Inc | Optical scanner |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04181913A (en) * | 1990-11-16 | 1992-06-29 | Canon Inc | Scanning optical device |
| JPH04245212A (en) * | 1991-01-30 | 1992-09-01 | Ricoh Co Ltd | Laser recording device |
| JPH04123651U (en) * | 1991-04-25 | 1992-11-10 | 旭光学工業株式会社 | Synchronous position detection structure of scanning optical system |
| JPH0580262A (en) * | 1991-09-20 | 1993-04-02 | Canon Inc | Laser beam scanning device |
| JPH06148543A (en) * | 1992-11-12 | 1994-05-27 | Minolta Camera Co Ltd | Optical beam scanning optical beam system |
| JPH07281113A (en) * | 1994-04-11 | 1995-10-27 | Canon Inc | Optical scanner |
| JPH08132670A (en) * | 1994-11-08 | 1996-05-28 | Canon Inc | Optical beam synchronization detector and image forming apparatus |
| JPH09197317A (en) * | 1996-01-16 | 1997-07-31 | Ricoh Co Ltd | Optical scanning device and lens unit for the same |
| JPH09230259A (en) * | 1996-01-25 | 1997-09-05 | Canon Inc | Plural-beam writing device |
| JPH09230263A (en) * | 1996-02-26 | 1997-09-05 | Ricoh Co Ltd | Optical scanner device |
| JPH10239609A (en) * | 1997-02-27 | 1998-09-11 | Ricoh Co Ltd | Optical scanner |
-
1998
- 1998-10-27 JP JP32156298A patent/JP4024952B2/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04181913A (en) * | 1990-11-16 | 1992-06-29 | Canon Inc | Scanning optical device |
| JPH04245212A (en) * | 1991-01-30 | 1992-09-01 | Ricoh Co Ltd | Laser recording device |
| JPH04123651U (en) * | 1991-04-25 | 1992-11-10 | 旭光学工業株式会社 | Synchronous position detection structure of scanning optical system |
| JPH0580262A (en) * | 1991-09-20 | 1993-04-02 | Canon Inc | Laser beam scanning device |
| JPH06148543A (en) * | 1992-11-12 | 1994-05-27 | Minolta Camera Co Ltd | Optical beam scanning optical beam system |
| JPH07281113A (en) * | 1994-04-11 | 1995-10-27 | Canon Inc | Optical scanner |
| JPH08132670A (en) * | 1994-11-08 | 1996-05-28 | Canon Inc | Optical beam synchronization detector and image forming apparatus |
| JPH09197317A (en) * | 1996-01-16 | 1997-07-31 | Ricoh Co Ltd | Optical scanning device and lens unit for the same |
| JPH09230259A (en) * | 1996-01-25 | 1997-09-05 | Canon Inc | Plural-beam writing device |
| JPH09230263A (en) * | 1996-02-26 | 1997-09-05 | Ricoh Co Ltd | Optical scanner device |
| JPH10239609A (en) * | 1997-02-27 | 1998-09-11 | Ricoh Co Ltd | Optical scanner |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1517539A2 (en) * | 1999-03-12 | 2005-03-23 | Canon Kabushiki Kaisha | Multibeam scanning optical apparatus and color image-forming apparatus |
| EP1517539A3 (en) * | 1999-03-12 | 2005-09-21 | Canon Kabushiki Kaisha | Multibeam scanning optical apparatus and color image-forming apparatus |
| JP2003043388A (en) * | 2001-07-31 | 2003-02-13 | Canon Inc | Scanning optical device and imaging apparatus using the same |
| JP2003075750A (en) * | 2001-09-07 | 2003-03-12 | Canon Inc | Scanning optical device and image forming device using the same |
| JP4708629B2 (en) * | 2001-09-07 | 2011-06-22 | キヤノン株式会社 | Scanning optical device and image forming apparatus using the same |
| US7154640B2 (en) | 2001-10-01 | 2006-12-26 | Canon Kabushiki Kaisha | Multi-beam scanning apparatus and image forming apparatus using the same |
| US6969846B2 (en) | 2002-02-28 | 2005-11-29 | Canon Kabushiki Kaisha | Light source unit and scanning optical apparatus using the same |
| US7321380B2 (en) | 2003-03-07 | 2008-01-22 | Canon Kabushiki Kaisha | Laser emitter and laser scanning device |
| JP2007286631A (en) * | 2007-05-28 | 2007-11-01 | Ricoh Co Ltd | Optical scanner and image-forming apparatus using same |
| JP2008309924A (en) * | 2007-06-13 | 2008-12-25 | Konica Minolta Business Technologies Inc | Optical scanner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4024952B2 (en) | 2007-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0676658B1 (en) | Scanning optical apparatus | |
| US4720632A (en) | Synchronizing light beam detector | |
| KR20000071292A (en) | Optical scanning apparatus and image forming apparatus and electrophotographic printer using such scanning apparatus | |
| JP2000131634A (en) | Optical scanner | |
| JP2001174732A (en) | Multi-beam light scanning optical system and image forming device using the system | |
| JP4109878B2 (en) | Scanning optical device | |
| JPH0553067A (en) | Lens for optical scan and optical scanner | |
| JP2971005B2 (en) | Optical scanning device | |
| JP2000098278A (en) | Optical scanner | |
| JP4708629B2 (en) | Scanning optical device and image forming apparatus using the same | |
| JPH1048554A (en) | Optical scanning device | |
| JP2603232B2 (en) | Scanning optical device | |
| JPH03131817A (en) | Light beam scanning optical device | |
| JPH10239609A (en) | Optical scanner | |
| KR100677139B1 (en) | Light scanning apparatus | |
| JP2002040340A (en) | Laser beam scanner | |
| JP2721386B2 (en) | Scanning optical device | |
| JP2954697B2 (en) | Optical scanning device | |
| JP3492902B2 (en) | Scanning optical device | |
| JPH11223781A (en) | Optical scanning device | |
| JP2002139686A (en) | Image-forming device | |
| JP2007086796A (en) | Optical scanner | |
| JP2003043389A (en) | Scan optical device | |
| JP2002023093A (en) | Scanning optical device | |
| JPH10186253A (en) | Scanning optical device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050831 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20050901 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20070622 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070703 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070831 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20071002 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20071004 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101012 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111012 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121012 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131012 Year of fee payment: 6 |
|
| LAPS | Cancellation because of no payment of annual fees |