JP2004333559A - Light source device and scanning optical device - Google Patents

Light source device and scanning optical device Download PDF

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Publication number
JP2004333559A
JP2004333559A JP2003125321A JP2003125321A JP2004333559A JP 2004333559 A JP2004333559 A JP 2004333559A JP 2003125321 A JP2003125321 A JP 2003125321A JP 2003125321 A JP2003125321 A JP 2003125321A JP 2004333559 A JP2004333559 A JP 2004333559A
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Japan
Prior art keywords
light source
source device
scanning
light
housing
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JP2003125321A
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Japanese (ja)
Inventor
Wataru Sato
亙 佐藤
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Canon Inc
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Canon Inc
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Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP2003125321A priority Critical patent/JP2004333559A/en
Publication of JP2004333559A publication Critical patent/JP2004333559A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device and a scanning optical device in which the sub scanning pitch of a multibeam is easily adjustable. <P>SOLUTION: In the light source device and the scanning optical device, a projected part provided at the laser holding member of the light source device and a plurality of stepped parts provided on the housing of the scanning optical device are butted to each other and the phase angle is regulated around the optical axis of the light source device, the subscanning pitch is adjustable. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【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・レーザファクシミリ等の画像記録装置等に用いられる光源装置および走査光学装置に関するものである。
【0002】
【従来の技術】
半導体レーザを用いた複数の発光点を有する光源装置の形態として特開平9−043253号公報および特開平11−133326号公報がある。これらは、光源部或いは光源装置を回動可能とさせて、複数のレーザ光の走査線ピッチを所定の間隔に調整する構成および調整方法が記載されている。
【0003】
【発明が解決しようとする課題】
しかしながら上記従来例によれば、下記のような問題点が生じていた。
【0004】
・光源部を回転させるために光源装置自体に回動手段を必要とし、光源装置の機構が複雑・大型・高コストになる。
【0005】
・光源装置を回動させるための大掛かりな調整治具が必要となり、光源装置のチャック部や回動用モータなどの機構が複雑になる。
【0006】
・光源装置の回路基板のコネクタ抜き差しなどのレーザ光の光軸周りの外力に対し、光源装置の固定力が弱い。
などの懸念がある。
【0007】
本発明は、上記従来の技術の有する未解決の課題に鑑みてなされたものであって、本出願に係る発明の目的は、光源装置および調整治具を簡単で低コストな構成で、簡易的に複数のレーザ光の走査線ピッチを所定の間隔に調整可能な光源装置および走査光学装置を提供することにある。
【0008】
【発明が解決しようとする手段】
上記目的を達成するため本出願に係る第1の発明は、半導体レーザを用いた複数の発光点を有する光源部、光源部から出射されるレーザ光を略平行光化するコリメータレンズ、光源部と該コリメータレンズを保持する保持部材を有する光源装置、略平行光化されたレーザ光を線状に集光するシリンドリカルレンズ、レーザ光を感光ドラムに結像・走査光とする偏向走査手段及び結像レンズ、これらを収納固定する筐体で構成される走査光学装置において、保持部材と筐体の光源装置の取り付け部にはそれぞれ当接或いは係合して、光源装置のレーザ光の光軸周りの回転位相を調整可能とする位相規制部位がそれぞれ備えられていることを特徴とする。
【0009】
上記構成において、簡単で一体的に構成できる光源装置および筐体の形状によって、容易に走査光ピッチの調整・設定ができ、低コストで生産性の高い走査光学装置を提供することができる。
【0010】
光源装置の保持部材の位相規制部には光源装置と筐体との固定部形状を有することを特徴とする。
【0011】
上記構成において、光源装置の特にレーザ光の光軸周りの固定を強固にできるので外力などによる光源装置の位置ずれによる走査線ピッチの変動を抑制できる。また、新たな部品を必要とせずに光源装置の固定が可能となる。したがって、低コストで信頼性の高い走査光学装置を提供することができる。
【0012】
【実施の実施の形態】
(第1の実施例)
本発明の特徴を最もよく表わす図画として、図1に走査光学装置Aの外観図、図2に光源装置Eの外観図、図3に光源装置Eの断面面を示す。
【0013】
まず、走査光学装置の構成を図1にて説明する。
【0014】
Eは光源装置、Jは光源装置Eから出射されるレーザ光、Gはシリンドリカルレンズ、RはポリゴンミラーR10を含む偏向走査装置、Fは結像レンズ、Mは折返しミラー、Bは検出ミラー、Dは走査開始信号検出器、Hは筐体、Lは光源装置Eを固定する固定板である。
【0015】
固定板Lにより筐体Hに取り付けられた光源装置Eから発生されたレーザ光JはシリンドリカルレンズGを経てポリゴンミラーRに照射し偏向走査される。その後レーザ光Jは結像レンズFを経て折返しミラーMによって反射され、図示しない感光ドラムの表面に結像される。感光ドラムに結像されるレーザ光Jは、ポリゴンミラーRの回転による主走査および感光ドラムの回転による副走査によって静電潜像を形成する。また、ポリゴンミラーRによって偏向走査されたレーザ光Jの一部分は検出ミラーBによって走査開始信号検出器Dへ導入され、走査開始信号検出器Dの出力信号によって、光源装置Eの半導体レーザ(不図示)が書き込み変調を開始する。なお、光源装置E、ポリゴンミラーR、結像レンズF、検出ミラーB、走査開始信号検出器D、折り返しミラーM等は筐体Hに取付けられ、筐体Hの上部開口は図示しないふたによって閉塞される。
【0016】
次に本発明の実施例であるところの光源装置Eを図2・図3にて説明する。
Sは(不図示)を有する光源であるところの半導体レーザ(図3参照)。
【0017】
S10はリードピン(図3参照)。
【0018】
Pは半導体レーザSを駆動するIC(不図示)を有する回路基板。
【0019】
10は半導体レーザSを保持するレーザホルダ。
【0020】
11は内部がレーザ光の光路となる円筒部。
【0021】
12は円筒部11の半導体レーザS側に設けられるフランジ。
【0022】
13は回路基板Pと半導体レーザSを接続しねじK(図3)にて固定する取付け部。
【0023】
14は円筒部11の内周部の一端に前記半導体レーザSを保持する圧入穴(図3参照)。
【0024】
15は円筒部11の半導体レーザS側に設けられる光学箱Hの嵌合穴H10に嵌合関係なる環部。
【0025】
16は円筒部11の外周面に設けられる突起部(図2参照)。
【0026】
Cはコリメータレンズ。
【0027】
上記構成において、半導体レーザSはレーザホルダ10の円筒部11の圧入穴12に直接圧入され固定保持される。この時、半導体レーザSとレーザホルダ10への位相角度は半導体レーザSの各発光点をCCDカメラ(不図示)などでモニタして画像処理により所定の圧入角度に調整され圧入される。回路基板Pは半導体レーザSのリードピンS10が回路基板Pに設けられた穴(不図示)を貫通した状態で、ねじKによってレーザホルダ10に締結固定される。次に半導体レーザSのリードピンS10は回路基板Pに半田付けされる。
【0028】
次にコリメータレンズCは図示しないチャックにより把持され、半導体レーザSとの光軸・焦点調整がされる。コリメータレンズCをXY方向に移動させ半導体レーザSとの光軸調整を行い、次にコリメータレンズCをZ方向に移動させ光源装置Eから出射されるレーザ光束が平行光になるように焦点調整が行われる。
光軸調整と焦点調整された後、図示しない接着剤などによりコリメータレンズCとレーザホルダ10は固定され光源装置Eとなる。
【0029】
次に光源装置Eの走査光学装置Aの筐体Hへの取付方法を図4〜図5にて説明する。
【0030】
H11ははレーザホルダ10の円筒部を支持するV字形状の支持部。
【0031】
H12〜14は光源装置Eの位相規制面となる段差。
【0032】
H15〜17は段差H12〜14の光軸方向の基準面。
【0033】
H18は位置決めピン(図5参照)。
【0034】
H19はレーザホルダ10のフランジ12面との光軸方向の当接面。
【0035】
上記構成において、光源装置Eはレーザホルダ10の円筒部11の外周が支持部H11のV字面に当接する状態で各取付位置に調整され、固定板Lによりねじ締結される。段差H12〜14は光源装置Eのレーザホルダ10の突起部16が各段差に当接するとき、光源装置Eのレーザ光Jの光軸周りの位相角度を可変するような段差面角度および形状に構成されている。
【0036】
光源装置Eの第1の取付位置は図5に示すようにレーザホルダ10のフランジ12が筐体Hの当接面H19に当接した状態であり、回転方向の位相はフランジ12の端面がピンH18に突き当たった角度となる。この時、レーザホルダ10の突起部16の光軸方向の位置は筐体Hの段差H12〜14とは当接しない位置にある。この状態にて固定板Lにより光源装置Eは筐体Hにねじ固定される。
【0037】
次に図6に示す光源装置Eの第2の取付位置は第1の取付位置から光源装置Eを光軸方向に移動させて行われる。回転方向にはレーザホルダ10の突起部16が筐体Hの段差H12に当接した位相角度で、光軸方向には突起部16が段差H12の光軸方向規制面H15に当接した位置にて調整される。
【0038】
以下、段差H13・H14に対応する第3・4の取付位置も同様に調整される。
【0039】
図7に2つの発光点の半導体レーザSを例に各取付位置の発光点の位相について示す。(a)〜(d)が第1〜4の取付位置に相当する。2つの発光点S1とS2を結ぶ線と水平方向の位相角度はα0>α1>α2>α3となる関係に設定され、所定の走査線ピッチに応じて4段階に取付位置を選択する。なお、本実施例では取付位置が4段階の構成について説明したが、4段階に限らず複数段階を選択できるような構成においても同様な効果が得られる。
【0040】
また、光源装置Eから出射されるレーザ光束が平行光なので光源装置Eの光軸方向位置が任意でも、走査光学装置の光学系性能を劣化させない。あるいはレーザ光束が略平行光であれば走査光学装置の光学性能を劣化させない範囲で光源装置Eの光軸方向の位置を移動させ位相角度を調整することも可能である。
上記構成の第1の実施例特有の効果。
【0041】
特別な調整治具や自動機などの使用や新たな部品を必要とすることなく、光源装置の光軸周りの位相角度を調整することで容易に走査光ピッチの調整・設定ができ、低コストで生産性の高い走査光学装置を提供することができる。
【0042】
(第2の実施例)
図8〜図10に第2の実施例の光源装置Eと筐体Hへの取付け状態を示す。
【0043】
30はレーザホルダ10の円筒部11に設けられ傾斜面31を有する突起部(図8・図9)。
H30は筐体Hの光源装置Eの取付け部に設けられ稜部H31を有する規制部(図10)。
【0044】
その他の構成と作用は第1の実施例の形態と同一なので、同一の符号を付して、その説明は省略する。
【0045】
上記構成において、筐体Hに取付けられた光源装置Eの位相角度は突起部30の傾斜面31と筐体Hの規制部H30の稜部H31が当接して決められる。そして、光源装置Eを傾斜面31と稜部H31が当接する方向に付勢しながら光軸方向に移動させることで傾斜面31の傾斜角度に従い連続的に位相角度が変化し走査線ピッチが設定される。
【0046】
上記構成の第2の実施例特有の効果。
【0047】
光源装置Eの光軸周りの位相角度を連続的に可変できるので、走査線ピッチの調整精度の高い高性能な走査光学装置が実現できる。
【0048】
(第3の実施例)
図11〜図13に第3の実施例の光源装置Eと筐体Hへの取付け状態を示す。
【0049】
41はレーザホルダ10の円筒部11に設けられねじ穴42を有する突起部。
【0050】
H41・42は筐体Hの光源装置Eの取付部に設けられる段差。
【0051】
その他の構成と作用は第1の実施例の形態と同一なので、同一の符号を付して、その説明は省略する。
【0052】
上記構成において、光源装置Eは突起部41が段差H41もしくはH42に当接した状態で位相角度が決められ、当接する突起部41と段差H41部にてねじ締結され筐体Hへ固定される。
【0053】
上記第3の実施例特有の効果。
【0054】
位相角度を決める当接部を固定用の部品を用いることなく直接固定するので、外力などによる光源装置の位置ずれ防止できる信頼性の高い走査光学装置を低コストで実現できる
【0055】
【発明の効果】
以上説明したように本出願に係わる第1・2の発明によれば、
・光源装置の形状や機構を複雑にすることなく走査光ピッチの調整が可能となる。
・光源装置を回転させるための複雑な調整治具を必要とすることなく走査光ピッチの調整が可能となる。
・外力などによる光源装置の光軸周りの位置ずれを防止する。
【0056】
したがって、容易な形状・構成と調整治具と調整方法の簡易化による低コスト化と調整精度向上による信頼性の高い0光源装置および走査光学装置を実現できる。
【図面の簡単な説明】
【図1】第1の実施例による走査光学装置の外観図。
【図2】第1の実施例による光源装置の外観図。
【図3】第1の実施例による光源装置の断面図。
【図4】光源装置Eの走査光学装置Aの筐体Hへの取付方法。
【図5】光源装置の取付方法の説明図。
【図6】光源装置の取付方法の説明図。
【図7】光源装置の取付方法の説明図。
【図8】光源装置の取付方法の説明図。
【図9】第2の実施例の光源装置。
【図10】第2の実施例の光源装置。
【図11】第3の実施例の光源装置と走査光学装置。
【図12】第3の実施例の光源装置と走査光学装置。
【図13】第3の実施例の光源装置と走査光学装置。
【符号の説明】
E 光源装置
H 筐体
H10 嵌合穴
S 半導体レーザ
P 回路基板
C コリメータレンズ
16、30、41 突起部
H12〜H14、H41・H42 段差
H30 規制部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a light source device and a scanning optical device used for an image recording device such as a laser beam printer and a laser facsimile.
[0002]
[Prior art]
JP-A-9-043253 and JP-A-11-133326 disclose light source devices having a plurality of light-emitting points using a semiconductor laser. These documents describe a configuration and an adjustment method in which a light source unit or a light source device is made rotatable and a scanning line pitch of a plurality of laser beams is adjusted to a predetermined interval.
[0003]
[Problems to be solved by the invention]
However, according to the above conventional example, the following problems have occurred.
[0004]
The light source device itself needs a rotation means to rotate the light source unit, and the mechanism of the light source device is complicated, large, and expensive.
[0005]
A large adjustment jig for rotating the light source device is required, and mechanisms such as a chuck portion and a rotation motor of the light source device are complicated.
[0006]
-The fixing force of the light source device is weak with respect to the external force around the optical axis of the laser light, such as the insertion and removal of the connector on the circuit board of the light source device.
There are concerns.
[0007]
The present invention has been made in view of the above-mentioned unresolved problems of the related art, and an object of the present invention is to provide a light source device and an adjusting jig with a simple, low-cost configuration, and a simple structure. Another object of the present invention is to provide a light source device and a scanning optical device capable of adjusting a scanning line pitch of a plurality of laser beams at predetermined intervals.
[0008]
Means to be Solved by the Invention
In order to achieve the above object, a first invention according to the present application is directed to a light source unit having a plurality of light emitting points using a semiconductor laser, a collimator lens for converting laser light emitted from the light source unit into substantially parallel light, and a light source unit. A light source device having a holding member for holding the collimator lens, a cylindrical lens that linearly condenses the substantially parallel laser light, a deflection scanning unit that forms the laser light on a photosensitive drum and scans light, and an image forming operation In a scanning optical device including a lens and a housing for housing and fixing the lens, the holding member and the mounting portion of the light source device of the housing are respectively in contact with or engaged with each other, and the light source device rotates around the optical axis of the laser light. It is characterized in that a phase regulating portion capable of adjusting the rotation phase is provided.
[0009]
In the above configuration, the scanning light pitch can be easily adjusted and set by the light source device and the shape of the housing that can be simply and integrally formed, and a scanning optical device with low cost and high productivity can be provided.
[0010]
The phase regulating portion of the holding member of the light source device has a shape of a fixed portion between the light source device and the housing.
[0011]
In the above configuration, the fixing of the light source device, particularly around the optical axis of the laser light, can be strengthened, so that the fluctuation of the scanning line pitch due to the displacement of the light source device due to external force or the like can be suppressed. In addition, the light source device can be fixed without requiring new components. Therefore, a low-cost and highly reliable scanning optical device can be provided.
[0012]
[Embodiment]
(First embodiment)
FIG. 1 shows an external view of a scanning optical device A, FIG. 2 shows an external view of a light source device E, and FIG.
[0013]
First, the configuration of the scanning optical device will be described with reference to FIG.
[0014]
E is a light source device, J is a laser beam emitted from the light source device E, G is a cylindrical lens, R is a deflection scanning device including a polygon mirror R10, F is an imaging lens, M is a folding mirror, B is a detection mirror, and D is Denotes a scanning start signal detector, H denotes a housing, and L denotes a fixing plate for fixing the light source device E.
[0015]
The laser beam J generated from the light source device E attached to the housing H by the fixing plate L irradiates the polygon mirror R via the cylindrical lens G to be deflected and scanned. Thereafter, the laser beam J is reflected by the turning mirror M via the imaging lens F, and is imaged on the surface of a photosensitive drum (not shown). The laser beam J formed on the photosensitive drum forms an electrostatic latent image by main scanning by rotation of the polygon mirror R and sub-scanning by rotation of the photosensitive drum. A part of the laser beam J deflected and scanned by the polygon mirror R is introduced into the scanning start signal detector D by the detection mirror B, and the semiconductor laser of the light source device E (not shown) is output by the output signal of the scanning start signal detector D. ) Starts write modulation. The light source device E, the polygon mirror R, the imaging lens F, the detection mirror B, the scanning start signal detector D, the folding mirror M, and the like are mounted on the housing H, and the upper opening of the housing H is closed by a lid (not shown). Is done.
[0016]
Next, a light source device E according to an embodiment of the present invention will be described with reference to FIGS.
S is a semiconductor laser (see FIG. 3) which is a light source having (not shown).
[0017]
S10 is a lead pin (see FIG. 3).
[0018]
P is a circuit board having an IC (not shown) for driving the semiconductor laser S.
[0019]
Reference numeral 10 denotes a laser holder for holding the semiconductor laser S.
[0020]
Reference numeral 11 denotes a cylindrical portion whose inside is an optical path of a laser beam.
[0021]
Reference numeral 12 denotes a flange provided on the side of the semiconductor laser S of the cylindrical portion 11.
[0022]
Reference numeral 13 denotes a mounting section for connecting the circuit board P and the semiconductor laser S and fixing them with screws K (FIG. 3).
[0023]
Reference numeral 14 denotes a press-fit hole for holding the semiconductor laser S at one end of the inner peripheral portion of the cylindrical portion 11 (see FIG. 3).
[0024]
Reference numeral 15 denotes an annular portion that is fitted to the fitting hole H10 of the optical box H provided on the semiconductor laser S side of the cylindrical portion 11.
[0025]
Reference numeral 16 denotes a protrusion provided on the outer peripheral surface of the cylindrical portion 11 (see FIG. 2).
[0026]
C is a collimator lens.
[0027]
In the above configuration, the semiconductor laser S is directly press-fitted into the press-fitting hole 12 of the cylindrical portion 11 of the laser holder 10 and fixedly held. At this time, the phase angle between the semiconductor laser S and the laser holder 10 is adjusted to a predetermined press-fit angle by image processing by monitoring each light emitting point of the semiconductor laser S with a CCD camera (not shown) or the like, and press-fit. The circuit board P is fastened and fixed to the laser holder 10 by screws K in a state where the lead pins S10 of the semiconductor laser S pass through holes (not shown) provided in the circuit board P. Next, the lead pin S10 of the semiconductor laser S is soldered to the circuit board P.
[0028]
Next, the collimator lens C is gripped by a chuck (not shown), and the optical axis and the focus with the semiconductor laser S are adjusted. The collimator lens C is moved in the X and Y directions to adjust the optical axis with the semiconductor laser S, and then the collimator lens C is moved in the Z direction to adjust the focus so that the laser beam emitted from the light source device E becomes parallel light. Done.
After the optical axis adjustment and the focus adjustment, the collimator lens C and the laser holder 10 are fixed by an adhesive (not shown) or the like to form the light source device E.
[0029]
Next, a method of attaching the light source device E to the housing H of the scanning optical device A will be described with reference to FIGS.
[0030]
H11 is a V-shaped supporting portion for supporting the cylindrical portion of the laser holder 10.
[0031]
H12 to H14 are steps that serve as phase control surfaces of the light source device E.
[0032]
H15 to 17 are reference planes of the steps H12 to H14 in the optical axis direction.
[0033]
H18 is a positioning pin (see FIG. 5).
[0034]
H19 is a contact surface of the laser holder 10 with the flange 12 surface in the optical axis direction.
[0035]
In the above configuration, the light source device E is adjusted to each mounting position with the outer periphery of the cylindrical portion 11 of the laser holder 10 abutting on the V-shaped surface of the support portion H11, and is screw-fastened by the fixing plate L. The steps H12 to H14 are configured to have a step surface angle and a shape such that the phase angle around the optical axis of the laser beam J of the light source device E is changed when the projection 16 of the laser holder 10 of the light source device E comes into contact with each step. Have been.
[0036]
The first mounting position of the light source device E is such that the flange 12 of the laser holder 10 is in contact with the contact surface H19 of the housing H as shown in FIG. The angle hits H18. At this time, the position of the projection 16 of the laser holder 10 in the optical axis direction is a position not in contact with the steps H12 to H14 of the housing H. In this state, the light source device E is screw-fixed to the housing H by the fixing plate L.
[0037]
Next, the second mounting position of the light source device E shown in FIG. 6 is performed by moving the light source device E in the optical axis direction from the first mounting position. At the phase angle at which the projection 16 of the laser holder 10 contacts the step H12 of the housing H in the rotation direction, and at the position where the projection 16 contacts the optical axis direction regulating surface H15 of the step H12 in the optical axis direction. Adjusted.
[0038]
Hereinafter, the third and fourth mounting positions corresponding to the steps H13 and H14 are similarly adjusted.
[0039]
FIG. 7 shows the phase of the light emitting point at each mounting position, taking the semiconductor laser S having two light emitting points as an example. (A) to (d) correspond to the first to fourth mounting positions. The phase angle between the line connecting the two light emitting points S1 and S2 and the horizontal direction is set so that α0>α1>α2> α3, and the mounting position is selected in four steps according to a predetermined scanning line pitch. In the present embodiment, the configuration in which the mounting position has four levels has been described. However, the same effect can be obtained in a configuration in which a plurality of levels can be selected instead of four levels.
[0040]
Further, since the laser beam emitted from the light source device E is parallel light, the optical system performance of the scanning optical device is not deteriorated even if the position of the light source device E in the optical axis direction is arbitrary. Alternatively, if the laser beam is substantially parallel light, the phase angle can be adjusted by moving the position of the light source device E in the optical axis direction within a range that does not deteriorate the optical performance of the scanning optical device.
Effects specific to the first embodiment having the above configuration.
[0041]
By adjusting the phase angle around the optical axis of the light source device, it is possible to easily adjust and set the scanning light pitch without using special adjustment jigs, automatic machines, etc., or new components, resulting in low cost. Thus, a scanning optical device with high productivity can be provided.
[0042]
(Second embodiment)
8 to 10 show a light source device E of the second embodiment and a state of attachment to a housing H.
[0043]
Reference numeral 30 denotes a protrusion provided on the cylindrical portion 11 of the laser holder 10 and having a slope 31 (FIGS. 8 and 9).
H30 is a restricting portion (FIG. 10) provided on the mounting portion of the light source device E of the housing H and having a ridge portion H31.
[0044]
Other configurations and operations are the same as those of the first embodiment, and thus the same reference numerals are given and the description thereof will be omitted.
[0045]
In the above configuration, the phase angle of the light source device E attached to the housing H is determined by the contact between the inclined surface 31 of the projection 30 and the ridge H31 of the regulating portion H30 of the housing H. Then, the light source device E is moved in the optical axis direction while urging the light source device E in the direction in which the inclined surface 31 and the ridge portion H31 are in contact with each other, so that the phase angle continuously changes according to the inclination angle of the inclined surface 31 and the scanning line pitch is set. Is done.
[0046]
Effects specific to the second embodiment having the above configuration.
[0047]
Since the phase angle around the optical axis of the light source device E can be continuously varied, a high-performance scanning optical device with high scanning line pitch adjustment accuracy can be realized.
[0048]
(Third embodiment)
FIGS. 11 to 13 show a light source device E of the third embodiment and a state of attachment to a housing H.
[0049]
Reference numeral 41 denotes a projection provided on the cylindrical portion 11 of the laser holder 10 and having a screw hole 42.
[0050]
H41 and H42 are steps provided on the mounting portion of the light source device E of the housing H.
[0051]
Other configurations and operations are the same as those of the first embodiment, and thus the same reference numerals are given and the description thereof will be omitted.
[0052]
In the above-described configuration, the phase angle of the light source device E is determined in a state where the projection 41 is in contact with the step H41 or H42, and the light source device E is fixed to the housing H by screwing with the projection 41 in contact with the step H41.
[0053]
Effects peculiar to the third embodiment.
[0054]
Since the contact portion for determining the phase angle is directly fixed without using a fixing component, a highly reliable scanning optical device capable of preventing the displacement of the light source device due to external force or the like can be realized at low cost.
【The invention's effect】
As described above, according to the first and second aspects of the present invention,
-The scanning light pitch can be adjusted without complicating the shape and mechanism of the light source device.
-The scanning light pitch can be adjusted without requiring a complicated adjustment jig for rotating the light source device.
・ Prevents displacement of the light source device around the optical axis due to external force or the like.
[0056]
Therefore, it is possible to realize a highly reliable zero light source device and a scanning optical device by reducing the cost by simplifying the shape and the configuration, the adjusting jig and the adjusting method, and by improving the adjusting accuracy.
[Brief description of the drawings]
FIG. 1 is an external view of a scanning optical device according to a first embodiment.
FIG. 2 is an external view of the light source device according to the first embodiment.
FIG. 3 is a cross-sectional view of the light source device according to the first embodiment.
FIG. 4 shows a method of attaching the light source device E to the housing H of the scanning optical device A.
FIG. 5 is an explanatory view of a method of attaching the light source device.
FIG. 6 is an explanatory view of a method of attaching the light source device.
FIG. 7 is an explanatory view of a method of attaching the light source device.
FIG. 8 is an explanatory view of a method of attaching the light source device.
FIG. 9 shows a light source device according to a second embodiment.
FIG. 10 shows a light source device according to a second embodiment.
FIG. 11 illustrates a light source device and a scanning optical device according to a third embodiment.
FIG. 12 illustrates a light source device and a scanning optical device according to a third embodiment.
FIG. 13 illustrates a light source device and a scanning optical device according to a third embodiment.
[Explanation of symbols]
E Light source device H Housing H10 Fitting hole S Semiconductor laser P Circuit board C Collimator lenses 16, 30, 41 Projections H12 to H14, H41, H42 Step H30 regulating part

Claims (2)

半導体レーザを用いた複数の発光点を有する光源部、該光源部から出射されるレーザ光を平行光化あるいは略平行光化するコリメータレンズ、該光源部と該コリメータレンズを保持する保持部材を有する光源装置、レーザ光を線状に集光するシリンドリカルレンズ、レーザ光を感光ドラムに結像・走査光とする偏向走査手段及び結像レンズ、これらを収納固定する筐体で構成される走査光学装置において、該保持部材と該筐体の該光源装置の取り付け部にはそれぞれ当接或いは係合して、該光源装置のレーザ光の光軸周りの位相角度を調整可能とする位相規制部位がそれぞれ備えられていることを特徴とする走査光学装置。A light source unit having a plurality of light emitting points using a semiconductor laser, a collimator lens for collimating or substantially collimating laser light emitted from the light source unit, and a holding member for holding the light source unit and the collimator lens A light source device, a cylindrical lens that condenses laser light linearly, a deflection scanning unit that forms laser light on a photosensitive drum and a scanning light, and an imaging lens, and a scanning optical device that includes a housing that houses and fixes them. In each of the above, the holding member and the mounting portion of the light source device of the housing are respectively in contact with or engaged with the light source device, and a phase regulating portion for adjusting a phase angle of the light source device around the optical axis of the laser light is provided. A scanning optical device, which is provided. 前記光源装置の前記保持部材の前記位相規制部には前記光源装置と前記筐体との固定部形状を有することを特徴とする請求項1記載の走査光学装置。The scanning optical device according to claim 1, wherein the phase regulating portion of the holding member of the light source device has a shape of a fixed portion between the light source device and the housing.
JP2003125321A 2003-04-30 2003-04-30 Light source device and scanning optical device Withdrawn JP2004333559A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007034208A (en) * 2005-07-29 2007-02-08 Canon Inc Scanning optical apparatus and image forming apparatus
US7990406B2 (en) 2008-03-04 2011-08-02 Ricoh Company, Ltd. Optical scanning device having a pitch adjustment device for adjusting a beam pitch and image forming apparatus including same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007034208A (en) * 2005-07-29 2007-02-08 Canon Inc Scanning optical apparatus and image forming apparatus
US7990406B2 (en) 2008-03-04 2011-08-02 Ricoh Company, Ltd. Optical scanning device having a pitch adjustment device for adjusting a beam pitch and image forming apparatus including same

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