JP2007140335A - Laser scanning optical apparatus - Google Patents

Laser scanning optical apparatus Download PDF

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Publication number
JP2007140335A
JP2007140335A JP2005336761A JP2005336761A JP2007140335A JP 2007140335 A JP2007140335 A JP 2007140335A JP 2005336761 A JP2005336761 A JP 2005336761A JP 2005336761 A JP2005336761 A JP 2005336761A JP 2007140335 A JP2007140335 A JP 2007140335A
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lens
adhesive
base
optical element
fixed
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JP4792938B2 (en
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Katsuhiro Nanba
克宏 難波
Hideaki Kusano
秀昭 草野
Atsushi Nagaoka
敦 長岡
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Konica Minolta Business Technologies Inc
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Konica Minolta Business Technologies Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a laser scanning optical apparatus which sufficiently resists the stress generated by correcting an optical performance while an optical element is adhered and fixed on a base, and keeps the corrected state of the optical element. <P>SOLUTION: In the laser scanning optical apparatus, a long lens 7 is adhered and fixed on a base 20 on which a slit 21 for passing light is formed. The back faces of both end parts of the lens 7 are fixed on the base 20 by an adhesive 31, and one side of the central part of the lens is fixed on the one face of a projected part 22 provide on the base 20 by the adhesive 31. The lens 7 is deformed by pressurizing force in the direction shown by an arrow A, and the adhesive 31 is filled between one side face of the lens 7 orthogonal to the acting direction (arrow A) of the pressurizing force and one face of the projected part 22 opposing to the side face. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、レーザ走査光学装置、特に、電子写真法による複写機やプリンタなどの画像形成装置に組み込まれ、感光体上に静電潜像を形成するためのレーザ走査光学装置に関する。   The present invention relates to a laser scanning optical apparatus, and more particularly to a laser scanning optical apparatus for forming an electrostatic latent image on a photosensitive member incorporated in an image forming apparatus such as an electrophotographic copying machine or printer.

従来、複写機やプリンタなどの画像形成装置において、感光体上に静電潜像を形成するためのレーザ走査光学装置はレンズなど長尺状の光学素子を備えており、これらの光学素子はハウジングなどの基台に感光体面上での走査ラインの副走査方向の湾曲（以下、ボウと記す）や像面湾曲などを補正した状態で位置精度よく固定される必要がある。   Conventionally, in an image forming apparatus such as a copying machine or a printer, a laser scanning optical device for forming an electrostatic latent image on a photosensitive member has a long optical element such as a lens. It is necessary to fix the position of the scanning line on the surface of the photoconductor in the sub-scanning direction (hereinafter referred to as “bow”), the curvature of field, and the like with high positional accuracy.

従来では、例えば、図１７に示すように、基台１００上に設けた固定突部１０１とばね片１０５との間に走査レンズ１１０を挟み込み、レンズ１１０を固定突部１０１に設けたねじ１０２の出し入れにより変形させてボウを補正するようにしたレーザ走査光学装置が実用に供されていた。   Conventionally, for example, as shown in FIG. 17, a scanning lens 110 is sandwiched between a fixed projection 101 provided on a base 100 and a spring piece 105, and a screw 102 provided with the lens 110 on the fixed projection 101 is provided. Laser scanning optical devices that have been deformed by loading and unloading to correct the bow have been put to practical use.

また、特許文献１には、図１８に示すように、走査レンズ１１０の両端部の２箇所及び中央部の光軸Ｐを跨ぐ２箇所において基台１００の表面と突部１０７，１０７の上面との間を接着剤１１５にて固定したレーザ走査光学装置が記載されている。   Further, in Patent Document 1, as shown in FIG. 18, the surface of the base 100 and the upper surfaces of the protrusions 107 and 107 are formed at two places on both ends of the scanning lens 110 and two places across the optical axis P at the center. A laser scanning optical device is described in which a gap is fixed with an adhesive 115.

しかしながら、図１７に示した装置では、走査レンズ１１０を基台１００に保持した状態でのボウの補正が可能であるが、ばね片１０５やそれを基台１００に固定するためのねじ１０６などの部品が必要となり、部品点数が増加するという問題点を有していた。   However, in the apparatus shown in FIG. 17, the bow can be corrected in a state where the scanning lens 110 is held on the base 100, but the spring piece 105 and the screw 106 for fixing it to the base 100 are used. There is a problem that parts are required and the number of parts increases.

また、図１８に示した装置では、光軸Ｐに直交する面内での平行移動、回転移動による調整を施した後での接着固定が可能であり、かつ、部品点数の増加を抑えることが可能である。しかし、走査レンズ１１０の中央部分の接着面積がどうしても小さくなるとともに、接着面がボウの補正のためにレンズ１１０を変形（矯正）させる矢印Ａ，Ａ’方向と平行であるため、変形で生じる剪断応力に対するクリープ強度が不足し、レンズ１１０の変形（矯正）状態を維持できないという問題点を有していた。
特開２００３−２２２８１４号公報 Further, in the apparatus shown in FIG. 18, it is possible to perform adhesive fixing after adjustment by parallel movement and rotation movement in a plane orthogonal to the optical axis P, and to suppress an increase in the number of parts. Is possible. However, since the adhesion area of the central portion of the scanning lens 110 is inevitably reduced, and the adhesion surface is parallel to the directions of the arrows A and A ′ for deforming (correcting) the lens 110 for correcting the bow, shear caused by deformation is caused. The problem is that the creep strength against stress is insufficient, and the deformation (correction) state of the lens 110 cannot be maintained.
JP 2003-222814 A

そこで、本発明の目的は、光学素子を基台に接着固定するにも拘わらず光学性能の補正のために生じる応力に充分に耐えることができ、光学素子の矯正状態を維持できるレーザ走査光学装置を提供することにある。   Accordingly, an object of the present invention is to provide a laser scanning optical device that can sufficiently withstand the stress generated for correcting the optical performance and can maintain the correction state of the optical element despite the fact that the optical element is bonded and fixed to the base. Is to provide.

以上の目的を達成するため、本発明は、長尺状の光学素子を基台に固定したレーザ走査光学装置において、少なくとも前記光学素子の両端部２箇所とほぼ中央部１箇所を前記基台に対する接着固定部とし、前記光学素子は接着固定に際して押圧力により変形を加えられており、前記押圧力が作用する方向にほぼ直交する前記光学素子の面と、該面に対向する前記基台の面とが接着固定されていることを特徴とする。   In order to achieve the above object, according to the present invention, in a laser scanning optical device in which a long optical element is fixed to a base, at least two ends of the optical element and one central part are located on the base. The optical element is deformed by a pressing force at the time of bonding and fixing, and the surface of the optical element that is substantially orthogonal to the direction in which the pressing force acts and the surface of the base that faces the surface And are fixed by bonding.

本発明に係るレーザ走査光学装置においては、光学素子に押圧力を作用させて光学性能を補正し、その押圧方向が作用する方向にほぼ直交する光学素子の面とこの面に対向する基台の面とを接着固定したため、レンズに残存する応力（変形復元力）が接着剤の厚み方向に作用し、応力に対しては十分なクリープ強度が確保され、光学素子の変形（矯正）状態を維持することができる。   In the laser scanning optical device according to the present invention, the optical performance is corrected by applying a pressing force to the optical element, and the surface of the optical element that is substantially perpendicular to the direction in which the pressing direction acts and the base opposite to this surface Since the surface is bonded and fixed, the stress (deformation restoring force) remaining on the lens acts in the thickness direction of the adhesive, ensuring sufficient creep strength against the stress and maintaining the deformation (correction) state of the optical element. can do.

本発明に係るレーザ走査光学装置にあっては、前記接着固定部のうちの少なくとも１箇所において光学素子と基台との間にギャップが設けられ、光学素子への押圧力による変形に伴うギャップの変化に応じて接着剤量が調整されていてもよい。光学素子の変形（矯正）状態に応じてギャップが変化するが、接着剤量をギャップの変化に応じて調整することによって接着面積が一定化して接着強度が安定化し、固化した接着剤がギャップを維持するスペーサとして機能し、光学素子の変形（矯正）状態の維持がより確実なものとなる。   In the laser scanning optical device according to the present invention, a gap is provided between the optical element and the base in at least one of the adhesive fixing portions, and the gap caused by the deformation due to the pressing force to the optical element is provided. The amount of adhesive may be adjusted according to the change. The gap changes according to the deformation (correction) state of the optical element, but by adjusting the amount of the adhesive according to the change in the gap, the adhesive area becomes constant and the adhesive strength is stabilized, and the solidified adhesive reduces the gap. It functions as a spacer to maintain, and the deformation (correction) state of the optical element is more reliably maintained.

また、前記接着固定部のうちの少なくとも１箇所において光学素子と基台との間にギャップが設けられ、該ギャップにはスペーサが介在されており、光学素子への押圧力による変形に伴うギャップの変化に応じてスペーサの厚みが調整されていてもよい。光学素子の変形（矯正）によるギャップの変化に応じてスペーサを介在しその厚みを調整することで、接着剤だけでは不足するギャップの維持力を補強することができる。   In addition, a gap is provided between the optical element and the base in at least one of the adhesive fixing portions, and a spacer is interposed in the gap, and a gap caused by deformation due to the pressing force to the optical element is provided. The thickness of the spacer may be adjusted according to the change. By interposing a spacer and adjusting its thickness in accordance with a change in the gap due to deformation (correction) of the optical element, it is possible to reinforce the gap maintenance force that is insufficient with only the adhesive.

さらに、前記接着固定部のうちの少なくとも１箇所において基台は弾性変形しない部分と弾性変形可能な部分とを有し、弾性変形しない部分と弾性変形可能な部分との間隔が調整可能であり、弾性変形可能な部分と光学素子とが接着固定されており、前記間隔の調整によって光学素子を変形させる押圧力が付与されていてもよい。弾性変形可能な部分で光学素子を接着固定し、弾性変形可能な部分を光学素子とともに変形（矯正）させるため、一定量の接着剤で固定することができ、また、接着固定後に光学性能の調整を行うことが可能となる。   Furthermore, the base has at least one portion of the adhesive fixing portion having a portion that is not elastically deformed and a portion that can be elastically deformed, and an interval between the portion that is not elastically deformable and the portion that can be elastically deformable is adjustable. The elastically deformable portion and the optical element may be bonded and fixed, and a pressing force for deforming the optical element may be applied by adjusting the distance. Since the optical element is bonded and fixed at the elastically deformable part and the elastically deformable part is deformed (corrected) together with the optical element, it can be fixed with a certain amount of adhesive, and the optical performance can be adjusted after the adhesive fixing Can be performed.

以下、本発明に係るレーザ走査光学装置の実施例について、添付図面を参照して説明する。なお、以下に示す第１〜第１２実施例においては同じ部材には同じ符号を付し、重複した説明は省略する。   Embodiments of a laser scanning optical apparatus according to the present invention will be described below with reference to the accompanying drawings. In addition, in the 1st-12th Example shown below, the same code | symbol is attached | subjected to the same member and the overlapping description is abbreviate | omitted.

（レーザ走査光学装置の概略構成、図１参照）
図１に本発明に係るレーザ走査光学装置の概略構成を示す。このレーザ走査光学装置１は、レーザダイオード２から放射されたレーザビームをコリメータレンズやシリンダレンズからなる第１光学系３でポリゴンミラー４の反射面に集光し、該ポリゴンミラー４の回転に基づいてレーザビームを主走査方向Ｙに等角速度で偏向し、さらに収差補正機能を有するレンズ６，７などからなる第２光学系５で結像／走査し、防塵ガラス８を介して矢印方向Ｘに回転駆動される感光体ドラム１０上を主走査方向Ｙに走査露光する。 (Schematic configuration of laser scanning optical device, see FIG. 1)
FIG. 1 shows a schematic configuration of a laser scanning optical apparatus according to the present invention. The laser scanning optical device 1 condenses a laser beam emitted from a laser diode 2 on a reflecting surface of a polygon mirror 4 by a first optical system 3 including a collimator lens and a cylinder lens, and based on the rotation of the polygon mirror 4. The laser beam is deflected at a constant angular velocity in the main scanning direction Y, further imaged / scanned by the second optical system 5 including the lenses 6 and 7 having an aberration correction function, and the like in the arrow direction X through the dust-proof glass 8. The photosensitive drum 10 that is driven to rotate is scanned and exposed in the main scanning direction Y.

電子写真法による画像の形成に際して使用されるこの種のレーザ走査光学装置１の各光学素子の構成や動作は周知であり、詳細な説明は省略する。   The configuration and operation of each optical element of this type of laser scanning optical apparatus 1 used for forming an image by electrophotography are well known and will not be described in detail.

（第１実施例、図２参照）
第１実施例において、図２に示すように、レーザ走査光学装置のハウジングの一部を構成する基台２０にはビーム透過用のスリット２１が形成されており、該スリット２１に沿って長尺のレンズ７が設けられている。レンズ７は両端部と中央部の一側面にて接着剤３１を介して基台２０の表面及び剛性を有する突部２２の一面に接着固定されている。レンズ７はスリット２１を通過したビームが透過し、その光軸を符号Ｐで示す。 (See the first embodiment, FIG. 2)
In the first embodiment, as shown in FIG. 2, a beam transmitting slit 21 is formed in a base 20 constituting a part of the housing of the laser scanning optical device, and the slit 21 is elongated along the slit 21. The lens 7 is provided. The lens 7 is bonded and fixed to the surface of the base 20 and one surface of the protruding portion 22 having rigidity through an adhesive 31 on one side surface of both ends and the central portion. The lens 7 transmits the beam that has passed through the slit 21, and its optical axis is indicated by symbol P.

レンズ７は、図２（Ｂ）に示すように、矢印Ａ方向に押圧力を加えてボウを補正された変形（矯正）状態にある。この場合、レンズ７の中央部一側面は変形を加えた方向の突部２２に接着剤３１を介して固定されている。基台２０にはスリット２１の中央部に対向する一対の突部２２，２３が設けられており、レンズ７に矢印Ａ方向の押圧力を加えてボウを補正した場合には、変形を加えた方向のレンズ７の一側面と突部２２の一面との間に接着剤３１を充填して固定する。ボウの補正にはレンズ７に対して矢印Ａ’方向に押圧力を加える場合もあり、この場合には、レンズ７の一側面と突部２３の一面との間に接着剤を充填して固定する。   As shown in FIG. 2B, the lens 7 is in a deformed (corrected) state in which the bow is corrected by applying a pressing force in the direction of the arrow A. In this case, one side surface of the central portion of the lens 7 is fixed to the protrusion 22 in the deformed direction via the adhesive 31. The base 20 is provided with a pair of protrusions 22 and 23 that face the central part of the slit 21. When the bow is corrected by applying a pressing force in the direction of arrow A to the lens 7, the deformation is applied. The adhesive 31 is filled and fixed between one side surface of the direction lens 7 and one surface of the protrusion 22. In order to correct the bow, a pressing force may be applied to the lens 7 in the direction of the arrow A ′. In this case, an adhesive is filled between one side surface of the lens 7 and one surface of the protrusion 23 and fixed. To do.

レンズ７はボウ補正のために加えた押圧力とは逆方向の応力が残存した状態で接着剤３１にて固定され、元に戻ろうとする力が発生する。接着剤３１はこの復元力に対して直交するレンズ７の一側面と突部２２の一面との間に厚みを持って介在されている。従って、応力（復元力）は接着剤３１に対して圧縮方向に作用し、接着剤３１は応力に対して十分なクリープ強度を有し、レンズ７の変形（矯正）状態を維持することができる。   The lens 7 is fixed by the adhesive 31 in a state where the stress in the direction opposite to the pressing force applied for bow correction remains, and a force to return the lens 7 is generated. The adhesive 31 is interposed between the one side surface of the lens 7 orthogonal to the restoring force and the one surface of the protrusion 22 with a thickness. Accordingly, the stress (restoring force) acts on the adhesive 31 in the compression direction, and the adhesive 31 has a sufficient creep strength against the stress, and can maintain the deformation (correction) state of the lens 7. .

また、レンズ７への押圧力による変形に伴ってレンズ７の一側面と突部２２の一面との間のギャップが変化する。このギャップの変化に応じて接着面が一定面積となるように接着剤３１の量が調整される。接着剤量をギャップの変化に応じて調整し、接着面積を一定化することにより接着強度が安定化する。そして、固化した接着剤３１がギャップを維持するスペーサとして機能し、レンズ７の変形（矯正）状態の維持がより確実なものとなる。   Further, the gap between one side surface of the lens 7 and one surface of the protrusion 22 changes with deformation due to the pressing force to the lens 7. The amount of the adhesive 31 is adjusted so that the adhesive surface has a constant area according to the change in the gap. The adhesive strength is stabilized by adjusting the amount of the adhesive according to the change of the gap and making the adhesive area constant. The solidified adhesive 31 functions as a spacer for maintaining the gap, and the lens 7 is more reliably maintained in a deformed (corrected) state.

本第１実施例の如くレンズ７の内部に応力を残してボウを補正した状態で基台２０上に接着固定する方法として以下の手順１，２を採用することができる。この手順１，２は以下に説明する第２〜第１２実施例においても基本的に同様である。   As in the first embodiment, the following procedures 1 and 2 can be adopted as a method of bonding and fixing on the base 20 in a state where the bow is corrected while leaving the stress inside the lens 7. The procedures 1 and 2 are basically the same in the second to twelfth embodiments described below.

手順１
（１）レンズ７を図示しない治具で保持する。
（２）レンズ７の両端を基台２０の表面に押し当てて光軸Ｐと直交する面内での位置調整を行う。
（３）治具によってレンズ７の中央部に矢印Ａ方向又は矢印Ａ’方向の押圧力を加えて曲線状に変形させ、ボウを補正する。
（４）前記補正の後、接着剤３１にてレンズ７の両端部及び中央部を基台２０に固定する。 Step 1
(1) Hold the lens 7 with a jig (not shown).
(2) Both ends of the lens 7 are pressed against the surface of the base 20 to adjust the position in a plane orthogonal to the optical axis P.
(3) A bow is corrected by applying a pressing force in the direction of arrow A or arrow A ′ to the center of the lens 7 with a jig to deform it into a curved shape.
(4) After the correction, the both ends and the center of the lens 7 are fixed to the base 20 with the adhesive 31.

手順２
（１）レンズ７を図示しない治具で保持する。
（２）レンズ７の両端部を基台２０の表面に押し当てて光軸Ｐと直交する面内で位置調整を行う。
（３）レンズ７の両端部を接着剤にて基台２０に固定する。
（４）治具によってレンズ７の中央部に矢印Ａ方向又は矢印Ａ’方向の押圧力を加えて曲線状に変形させ、ボウを補正する。
（５）前記補正の後、レンズ７の中央部を接着剤３１にて突部２２又は２３に固定する。 Step 2
(1) Hold the lens 7 with a jig (not shown).
(2) Both ends of the lens 7 are pressed against the surface of the base 20 to adjust the position in a plane orthogonal to the optical axis P.
(3) Both ends of the lens 7 are fixed to the base 20 with an adhesive.
(4) A bow is corrected by applying a pressing force in the direction of the arrow A or the direction of the arrow A ′ to the center portion of the lens 7 with a jig to deform it into a curved shape.
(5) After the correction, the central portion of the lens 7 is fixed to the protrusion 22 or 23 with the adhesive 31.

なお、押圧力の加わり方から見れば手順１が理想的である。一方、手順２は、押圧力を加える矯正時に既にレンズ７の両端部が基台２０に固定されているため、矯正を容易に行うことができる。   Note that Procedure 1 is ideal from the viewpoint of how the pressing force is applied. On the other hand, in the procedure 2, since both ends of the lens 7 are already fixed to the base 20 at the time of correction to apply the pressing force, correction can be easily performed.

また、レンズ７を光軸Ｐを直交する面内で位置調整したり、押圧力を作用させてボウを補正するには、装置の動作状態とほぼ同じ条件にて実際にビームをレンズ７に入射させ、結像状態を確認しつつ調整してもよい。あるいは、レンズ７などの誤差を予め測定しておき、測定値に基づいて調整してもよい。   In addition, in order to adjust the position of the lens 7 in a plane orthogonal to the optical axis P or to correct the bow by applying a pressing force, the beam is actually incident on the lens 7 under substantially the same conditions as the operation state of the apparatus. The image may be adjusted while confirming the image formation state. Alternatively, the error of the lens 7 or the like may be measured in advance and adjusted based on the measured value.

ここで、第１実施例における材料の一例を挙げると、基台２０にはポリカーボネート系の樹脂材料が用いられ、レンズ７にはポリオレフィン系の樹脂材料が用いられる。また、接着剤３１については、アクリル系紫外線硬化型接着剤が用いられる。なお、本発明はこれらの材料に限定するものではなく、基台２０は金属材であってもよく、レンズ７はガラス製であってもよい。   Here, as an example of the material in the first embodiment, a polycarbonate resin material is used for the base 20, and a polyolefin resin material is used for the lens 7. For the adhesive 31, an acrylic ultraviolet curable adhesive is used. Note that the present invention is not limited to these materials, and the base 20 may be a metal material, and the lens 7 may be made of glass.

接着剤３１に関しては、レンズ７に接する接着面積（数ｍｍ2〜数十ｍｍ2）に対して小さな断面積（数ｍｍ2以下）で接着した場合、残留応力の作用方向に対して引張・圧縮に対する強度の安定性が高く、クリープ特性に優れている材料を選択することが好ましい。 When the adhesive 31 is bonded with a small cross-sectional area (several mm 2 or less) with respect to the bonding area (several mm 2 to several tens mm 2 ) in contact with the lens 7, it is tensile / compressed with respect to the acting direction of residual stress It is preferable to select a material that has high stability against strength and excellent creep characteristics.

図３は前記第１実施例の変形例を示し、レンズ７の中央部両面を一対の突部２２，２３に接着剤３１を介して固定したものである。   FIG. 3 shows a modification of the first embodiment, in which both surfaces of the central portion of the lens 7 are fixed to a pair of protrusions 22 and 23 via an adhesive 31.

（第２実施例、図４参照）
前記第１実施例では、レンズ７の両端部をボウ補正時の押圧方向から見て剪断方向に相当する面で基台２０に接着固定している。これに対して、本第２実施例では、図４に示すように、基台２０上に中央部の突部２２に対向する側に一対の突部２４，２４を設け、該突部２４，２４の一面に接着剤３１にてレンズ７の両端部一側面を固定したものである。レンズ７の中央部に関しては第１実施例と同様の構成で接着固定されている。 (Refer to the second embodiment, FIG. 4)
In the first embodiment, both end portions of the lens 7 are bonded and fixed to the base 20 with surfaces corresponding to the shearing direction when viewed from the pressing direction during bow correction. On the other hand, in the second embodiment, as shown in FIG. 4, a pair of protrusions 24, 24 are provided on the base 20 on the side facing the central protrusion 22. One side surface of both ends of the lens 7 is fixed to one surface 24 with an adhesive 31. The central portion of the lens 7 is bonded and fixed in the same configuration as in the first embodiment.

本第２実施例では、前記第１実施例と同様の作用効果を奏し、加えて、レンズ７の両端部においてもレンズ７の矯正変形によって生じる応力が接着剤３１には引張・圧縮方向に作用するため、第１実施例よりもクリープの影響を抑えることが可能になる。また、第１実施例ではレンズ７の両端部が基台２０の表面で規制されていたが、本第２実施例では基台２０の表面で規制してもよく、あるいは、規制しなくてもよく、レンズ７の配置の自由度を高めて調整することができる。   In the second embodiment, the same operational effects as in the first embodiment are obtained. In addition, the stress caused by the correction deformation of the lens 7 also acts on the adhesive 31 in the tension / compression direction at both ends of the lens 7. Therefore, the influence of creep can be suppressed as compared with the first embodiment. In the first embodiment, both end portions of the lens 7 are regulated on the surface of the base 20, but in the second embodiment, the lens 7 may be regulated on the surface of the base 20, or may not be regulated. The lens 7 can be adjusted with a high degree of freedom in arrangement.

（第３実施例、図５参照）
第３実施例は、図５に示すように、レンズ７の両端部を固定する一対の突部２５，２５を中央部の突部２２と同じ側に設けたものであり、他の構成は前記第２実施例と同様である。従って、その作用効果も第２実施例と同様である。 (Refer to the third embodiment, FIG. 5)
In the third embodiment, as shown in FIG. 5, a pair of protrusions 25 and 25 for fixing both end portions of the lens 7 are provided on the same side as the protrusion 22 in the central portion, and the other configuration is as described above. The same as in the second embodiment. Therefore, the effect is the same as that of the second embodiment.

図６は前記第３実施例の変形例を示し、第３実施例で示した突部２２，２５，２５を一体物である突条２６としたものである。基台２０の形状がシンプルとなって強度が向上し、レンズ７からの応力に対する安定性が高まる。   FIG. 6 shows a modification of the third embodiment, in which the protrusions 22, 25, 25 shown in the third embodiment are formed as ridges 26 that are integrated. The shape of the base 20 is simplified, the strength is improved, and the stability against the stress from the lens 7 is increased.

（第４〜第６実施例、図７〜図９参照）
第４〜第６実施例は、それぞれ、図７〜図９に示すように、突部２２とレンズ７の中央部一側面との間のギャップに薄板状のスペーサ３５を介在させ、接着剤３１にて固定したものである。スペーサ３５を介在させる以外の構成は、図７に示す第４実施例は前記第１実施例と同じであり、図８に示す第５実施例は前記第２実施例と同じであり、突部２４とレンズ７の両端部一側面との間のギャップにもスペーサ３５が介在されている。図９に示す第６実施例は前記第３実施例の変形例と同様である。 (Refer to the fourth to sixth embodiments, FIGS. 7 to 9)
In the fourth to sixth embodiments, as shown in FIGS. 7 to 9, a thin plate-like spacer 35 is interposed in the gap between the protrusion 22 and one side surface of the central portion of the lens 7, respectively. It is fixed with. Except for the spacer 35, the fourth embodiment shown in FIG. 7 is the same as the first embodiment, and the fifth embodiment shown in FIG. 8 is the same as the second embodiment. A spacer 35 is also interposed in the gap between the lens 24 and one side surface of both ends of the lens 7. The sixth embodiment shown in FIG. 9 is the same as the modification of the third embodiment.

スペーサ３５は、薄い樹脂シートからなるもので、レンズ７のボウ補正に対応する変形量に応じてギャップに埋め込まれるように枚数を選択して介在される。ギャップに接着剤３１のみが介在されていると、接着剤３１の弾性変形によってレンズ７の矯正状態がずれてしまうおそれがある。それゆえ、レンズ７の変形（矯正）によるギャップの量に応じてスペーサ３５をギャップが埋まるように介在させることで、接着剤３１だけでは不足するギャップの維持力を補強することができる。   The spacer 35 is made of a thin resin sheet, and is interposed by selecting the number of sheets so as to be embedded in the gap according to the deformation amount corresponding to the bow correction of the lens 7. If only the adhesive 31 is interposed in the gap, the correction state of the lens 7 may be shifted due to elastic deformation of the adhesive 31. Therefore, by interposing the spacer 35 so that the gap is filled according to the amount of the gap due to deformation (correction) of the lens 7, it is possible to reinforce the gap maintenance force that is insufficient with the adhesive 31 alone.

スペーサ３５としては、接着剤３１との相性のよい樹脂を使用することが好ましいが、必ずしもそうである必要はない。接着剤３１に紫外線硬化型のものを使用する場合には、スペーサ３５に紫外線透過性の良好な材料（例えば、透明樹脂など）を使用すれば、紫外線が接着剤３１の奥部まで透過し、接着剤３１に未硬化部分を生じることを防止することができる。   As the spacer 35, it is preferable to use a resin having good compatibility with the adhesive 31, but it is not always necessary. In the case of using an ultraviolet curing type adhesive 31, if a material having a good ultraviolet transparency (for example, a transparent resin) is used for the spacer 35, the ultraviolet light is transmitted to the inner part of the adhesive 31. It is possible to prevent an uncured portion from being generated in the adhesive 31.

（第７実施例、図１０参照）
第７実施例は、図１０に示すように、基本的には前記第１実施例と同様の構成を備えたもので、突部２２にねじ２７を螺着し、ねじ２７を出し入れすることでレンズ７に押圧力を作用させ、ボウを補正するようにしている。ボウの補正後、レンズ７の一側面と突部２２の一面との間には接着剤３１が充填される。 (Refer to the seventh embodiment, FIG. 10)
As shown in FIG. 10, the seventh embodiment basically has the same configuration as that of the first embodiment, and a screw 27 is screwed onto the protrusion 22 and the screw 27 is taken in and out. A pressure is applied to the lens 7 to correct the bow. After the bow correction, an adhesive 31 is filled between one side surface of the lens 7 and one surface of the protrusion 22.

本第７実施例では、ねじ２７にてボウを補正することで微妙な補正を容易に行うことができる。また、前記手順２で説明したように、先にレンズ７の両端部を基台２０に接着固定しておけば、レンズ７のボウ補正はねじ２７のみで行うことができ、特別な治具は不要になる。なお、第７実施例は第１実施例のみならず第２及び第３実施例に対しても適用することができる。   In the seventh embodiment, a delicate correction can be easily performed by correcting the bow with the screw 27. Further, as described in the procedure 2, if both ends of the lens 7 are bonded and fixed to the base 20 in advance, the bow of the lens 7 can be corrected only with the screw 27, and a special jig is used. It becomes unnecessary. The seventh embodiment can be applied not only to the first embodiment but also to the second and third embodiments.

（第８実施例、図１１参照）
第８実施例は、図１１に示すように、基台２０に弾性変形しない突部３６と弾性変形可能な突部３７とを設け、突部３６に螺着したねじ３８が突部３７に当接し、ねじ３８の出し入れによって突部３６，３７の間隔を調整可能としたものである。レンズ７の両端部は前記第１実施例と同様に接着剤３１にて基台２０上に固定されており、レンズ７の中央部は弾性変形可能な突部３７に接着剤３１にて固定されている。 (See the eighth embodiment, FIG. 11)
In the eighth embodiment, as shown in FIG. 11, the base 20 is provided with a protrusion 36 that is not elastically deformed and a protrusion 37 that is elastically deformable, and a screw 38 screwed to the protrusion 36 contacts the protrusion 37. In contact with each other, the distance between the protrusions 36 and 37 can be adjusted by inserting and removing the screw 38. Both ends of the lens 7 are fixed on the base 20 with an adhesive 31 as in the first embodiment, and the center of the lens 7 is fixed to an elastically deformable protrusion 37 with an adhesive 31. ing.

ボウ補正は、ねじ３８を突部３６に対して出し入れし、突部３７を撓ませて押圧力をレンズ７の中央部に作用させることで行われる。予め、突部３７の一面とレンズ７の中央部一側面とを接着剤３１で固定しておき、その後、ねじ３８を出し入れしてボウ補正を行う。この場合に、補正量に拘わらず接着剤３１の厚さは一定になる。補正量に伴って接着剤３１の厚さが異なると、レンズ７の特性にばらつきが生じるおそれがある。本第８実施例では補正量に拘わらず接着剤３１の厚さを一定にできるため、レンズ７の特性のばらつきを抑えることができる。また、接着固定後にボウ補正を行うことも可能である。なお、第８実施例は第１実施例のみならず第２及び第３実施例に対しても適用できることは勿論である。   Bow correction is performed by inserting and removing the screw 38 with respect to the protrusion 36, bending the protrusion 37, and applying a pressing force to the central portion of the lens 7. In advance, one surface of the projection 37 and one side surface of the central portion of the lens 7 are fixed with an adhesive 31, and then the screw 38 is inserted and removed to perform bow correction. In this case, the thickness of the adhesive 31 is constant regardless of the correction amount. If the thickness of the adhesive 31 varies with the correction amount, the characteristics of the lens 7 may vary. In the eighth embodiment, since the thickness of the adhesive 31 can be made constant regardless of the correction amount, variations in the characteristics of the lens 7 can be suppressed. It is also possible to perform bow correction after fixing the adhesive. Needless to say, the eighth embodiment can be applied not only to the first embodiment but also to the second and third embodiments.

（第９実施例、図１２参照）
第９実施例は、図１２に示すように、前記第８実施例の構成に加えて、レンズ７の両端部においても、基台２０に弾性変形しない突部４１と弾性変形可能な突部４２とを設け、突部４１に螺着したねじ４３が突部４２に当接し、ねじ４３の出し入れによって突部４１，４２の間隔を調整可能としたものである。本第９実施例においては、レンズ７の変形（矯正）状態をより確実に維持することができる。 (Refer to the ninth embodiment, FIG. 12)
In the ninth embodiment, as shown in FIG. 12, in addition to the configuration of the eighth embodiment, at both ends of the lens 7, a protrusion 41 that is not elastically deformed to the base 20 and a protrusion 42 that is elastically deformable. The screw 43 screwed to the protrusion 41 abuts the protrusion 42, and the distance between the protrusions 41 and 42 can be adjusted by inserting and removing the screw 43. In the ninth embodiment, the deformation (correction) state of the lens 7 can be more reliably maintained.

（第１０実施例、図１３参照）
第１０実施例は、図１３に示すように、基台５０に対してレンズ７を光軸Ｐが基台２０の表面と平行に位置するように設け、レンズ７に対して矢印Ｂ方向に押圧力を作用させることでレンズ７を変形させ、感光体面上での像面湾曲を補正するように構成したものである。 (10th embodiment, see FIG. 13)
In the tenth embodiment, as shown in FIG. 13, the lens 7 is provided on the base 50 so that the optical axis P is parallel to the surface of the base 20, and the lens 7 is pushed in the arrow B direction. The lens 7 is deformed by applying pressure, and the curvature of field on the surface of the photosensitive member is corrected.

即ち、レンズ７の両端部は基台５０上に設けた突部５１，５１に接着剤３１にて固定され、レンズ７の中央部が矢印Ｂ方向への押圧力にて補正された後、レンズ７の中央部凸面側が基台５０上に設けた突部５２に接着剤３１にて固定される。本第１０実施例において、レンズ７は像面湾曲補正のために加えた押圧力に対する応力を残したまま接着剤３１にて固定され、元に戻ろうとする力（矢印Ｂ’方向）が発生する。接着剤３１はこの復元力に対して直交するレンズ７の一側面と突部５２の一面との間に介在されている。従って、応力（復元力）は接着剤３１に対して引張・圧縮方向に作用し、接着剤３１は応力に対して十分なクリープ強度を有し、レンズ７の変形（矯正）状態を維持することができる。   That is, both end portions of the lens 7 are fixed to the protrusions 51 and 51 provided on the base 50 by the adhesive 31, and the center portion of the lens 7 is corrected by the pressing force in the direction of the arrow B, and then the lens 7 is fixed to the projection 52 provided on the base 50 by the adhesive 31. In the tenth embodiment, the lens 7 is fixed by the adhesive 31 while leaving the stress against the pressing force applied for correcting the curvature of field, and a force for returning to the original direction (in the direction of arrow B ′) is generated. . The adhesive 31 is interposed between one side surface of the lens 7 orthogonal to the restoring force and one surface of the protrusion 52. Therefore, the stress (restoring force) acts on the adhesive 31 in the tension / compression direction, and the adhesive 31 has a sufficient creep strength against the stress and maintains the deformation (correction) state of the lens 7. Can do.

（第１１実施例、図１４参照）
第１１実施例は、図１４に示すように、突部２２，２３にレンズ７の裏面側を支持する突起部２２ａ，２３ａを設け、突起部２２ａ，２３ａにても接着剤３１でレンズ７の中央部裏面を固定可能としたものである。本第１１実施例において他の構成は前記第１実施例と同様である。なお、第１実施例以外の他の実施例に適用することも可能である。 (Refer to the eleventh embodiment, FIG. 14)
In the eleventh embodiment, as shown in FIG. 14, the protrusions 22 and 23 are provided with protrusions 22a and 23a for supporting the back side of the lens 7, and the adhesive 31 also attaches the protrusions 22a and 23a. The center back surface can be fixed. Other configurations in the eleventh embodiment are the same as those in the first embodiment. It is also possible to apply to other embodiments other than the first embodiment.

図１４は突起部２２ａを設けた突部２２にてレンズ７の中央部一側面・裏面を接着剤３１を介して固定している。図１５は第１１実施例の変形例であって、レンズ７の中央部両側面・裏面を突起部２２ａ，２３ａを設けた一対の突部２２，２３にて接着剤３１を介して固定している。   In FIG. 14, one side surface / back surface of the central portion of the lens 7 is fixed via an adhesive 31 by the protrusion 22 provided with the protrusion 22 a. FIG. 15 shows a modification of the eleventh embodiment, in which the both side surfaces and the back surface of the central portion of the lens 7 are fixed by an adhesive 31 with a pair of protrusions 22 and 23 provided with protrusions 22a and 23a. Yes.

（第１２実施例、図１６参照）
第１２実施例は、図１６に示すように、レンズ７の中央部を固定する構造は前記第１１実施例と同様であり、さらに、レンズ７の両端部をも裏面及び側面を接着剤３１を介して固定したもので、レンズ７の両端部側面は突部２５，２５の一面に充填された接着剤３１にて固定されている。 (Refer to the twelfth embodiment, FIG. 16)
In the twelfth embodiment, as shown in FIG. 16, the structure for fixing the central portion of the lens 7 is the same as that of the eleventh embodiment. The side surfaces of both ends of the lens 7 are fixed with an adhesive 31 filled on one surface of the protrusions 25, 25.

（他の実施例）
なお、本発明に係るレーザ走査光学装置は前記実施例に限定するものではなく、その要旨の範囲内で種々に変更できる。 (Other examples)
The laser scanning optical device according to the present invention is not limited to the above-described embodiments, and can be variously modified within the scope of the gist thereof.

例えば、基台２０，５０の構成、形状は任意であり、装置のハウジングと一体的であっても、別体に構成したもののいずれであってもよい。また、本発明は走査レンズ７以外にも長尺状の折返しミラーなどを変形させて光学性能を補正する構成に適用することもできる。   For example, the configurations and shapes of the bases 20 and 50 are arbitrary, and may be either integrated with the housing of the apparatus or configured separately. In addition to the scanning lens 7, the present invention can be applied to a configuration in which a long folding mirror or the like is deformed to correct optical performance.

本発明に係るレーザ走査光学装置の一例を示す概略構成図である。It is a schematic block diagram which shows an example of the laser scanning optical apparatus which concerns on this invention. 第１実施例の要部を示し、（Ａ）は斜視図、（Ｂ）は平面図である。The principal part of 1st Example is shown, (A) is a perspective view, (B) is a top view. 第１実施例の変形例を示す平面図である。It is a top view which shows the modification of 1st Example. 第２実施例の要部を示し、（Ａ）は斜視図、（Ｂ）は平面図である。The principal part of 2nd Example is shown, (A) is a perspective view, (B) is a top view. 第３実施例の要部を示し、（Ａ）は斜視図、（Ｂ）は平面図である。The principal part of 3rd Example is shown, (A) is a perspective view, (B) is a top view. 第３実施例の変形例を示す平面図である。It is a top view which shows the modification of 3rd Example. 第４実施例の要部を示す平面図である。It is a top view which shows the principal part of 4th Example. 第５実施例の要部を示す平面図である。It is a top view which shows the principal part of 5th Example. 第６実施例の要部を示す平面図である。It is a top view which shows the principal part of 6th Example. 第７実施例の要部を示す平面図である。It is a top view which shows the principal part of 7th Example. 第８実施例の要部を示す平面図である。It is a top view which shows the principal part of 8th Example. 第９実施例の要部を示す平面図である。It is a top view which shows the principal part of 9th Example. 第１０実施例の要部を示し、（Ａ）は斜視図、（Ｂ）は平面図である。The principal part of 10th Example is shown, (A) is a perspective view, (B) is a top view. 第１１実施例の要部を示し、（Ａ）は斜視図、（Ｂ）は平面図である。The principal part of 11th Example is shown, (A) is a perspective view, (B) is a top view. 第１１実施例の変形例を示す平面図である。It is a top view which shows the modification of 11th Example. 第１２実施例の要部を示し、（Ａ）は斜視図、（Ｂ）は平面図である。The principal part of 12th Example is shown, (A) is a perspective view, (B) is a top view. 第１の従来例の要部を示し、（Ａ）は斜視図、（Ｂ）は平面図である。The principal part of a 1st prior art example is shown, (A) is a perspective view, (B) is a top view. 第２の従来例の要部を示し、（Ａ）は斜視図、（Ｂ）は平面図である。The principal part of a 2nd prior art example is shown, (A) is a perspective view, (B) is a top view.

符号の説明Explanation of symbols

７…長尺状レンズ
２０，５０…基台
２２，２３，２４，２５…突部
２６…突条
２７，３８，４３…ねじ
３１…接着剤
３５…スペーサ
３６，３７，４１，４２，５１，５２…突部
7 ... Long lens 20, 50 ... Base 22, 23, 24, 25 ... Projection 26 ... Projection 27, 38, 43 ... Screw 31 ... Adhesive 35 ... Spacer 36, 37, 41, 42, 51, 52. Projection

Claims (4)

長尺状の光学素子を基台に固定したレーザ走査光学装置において、
少なくとも前記光学素子の両端部２箇所とほぼ中央部１箇所を前記基台に対する接着固定部とし、
前記光学素子は接着固定に際して押圧力により変形を加えられており、
前記押圧力が作用する方向にほぼ直交する前記光学素子の面と、該面に対向する前記基台の面とが接着固定されていること、
を特徴とするレーザ走査光学装置。 In a laser scanning optical device in which a long optical element is fixed to a base,
At least two locations on both ends of the optical element and approximately one central portion as an adhesive fixing portion for the base,
The optical element is deformed by a pressing force when bonding and fixing,
The surface of the optical element that is substantially orthogonal to the direction in which the pressing force acts and the surface of the base that faces the surface are bonded and fixed.
A laser scanning optical device. 前記接着固定部のうちの少なくとも１箇所において前記光学素子と前記基台との間にギャップが設けられ、
前記光学素子への押圧力による変形に伴う前記ギャップの変化に応じて接着剤量が調整されていること、
を特徴とする請求項１に記載のレーザ走査光学装置。 A gap is provided between the optical element and the base in at least one of the adhesive fixing portions,
The amount of adhesive is adjusted according to the change in the gap due to the deformation caused by the pressing force on the optical element,
The laser scanning optical apparatus according to claim 1. 前記接着固定部のうちの少なくとも１箇所において前記光学素子と前記基台との間にギャップが設けられ、
前記ギャップにはスペーサが介在されており、
前記光学素子への押圧力による変形に伴う前記ギャップの変化に応じて前記スペーサの厚みが調整されていること、
を特徴とする請求項１に記載のレーザ走査光学装置。 A gap is provided between the optical element and the base in at least one of the adhesive fixing portions,
A spacer is interposed in the gap,
The thickness of the spacer is adjusted according to the change in the gap due to the deformation caused by the pressing force to the optical element;
The laser scanning optical apparatus according to claim 1. 前記接着固定部のうちの少なくとも１箇所において前記基台は弾性変形しない部分と弾性変形可能な部分とを有し、弾性変形しない部分と弾性変形可能な部分との間隔が調整可能であり、
前記弾性変形可能な部分と前記光学素子とが接着固定されており、
前記間隔の調整によって前記光学素子を変形させる押圧力が付与されていること、
を特徴とする請求項１に記載のレーザ走査光学装置。
In at least one of the adhesive fixing portions, the base has an elastically deformable portion and an elastically deformable portion, and an interval between the non-elastically deformable portion and the elastically deformable portion is adjustable,
The elastically deformable portion and the optical element are bonded and fixed,
A pressing force for deforming the optical element is applied by adjusting the distance;
The laser scanning optical apparatus according to claim 1.
JP2005336761A 2005-11-22 2005-11-22 Laser scanning optical device Expired - Fee Related JP4792938B2 (en)

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JP2007298684A (en) * 2006-04-28 2007-11-15 Brother Ind Ltd Scanning optical apparatus
JP2013242415A (en) * 2012-05-21 2013-12-05 Konica Minolta Inc Laser-scanning optical device, and image forming apparatus
US8963979B2 (en) 2012-05-21 2015-02-24 Konica Minolta, Inc. Fixing structure for fixing optical element, laser scanning apparatus, image forming apparatus, and method for fixing optical element
JP2015129949A (en) * 2015-01-31 2015-07-16 株式会社リコー Mirror curve adjustment mechanism, optical writing device, and image forming apparatus
JP2016001228A (en) * 2014-06-11 2016-01-07 株式会社リコー Lens unit, image reading device, and image forming apparatus

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JPH07175000A (en) * 1993-12-20 1995-07-14 Fuji Xerox Co Ltd Lens mounting structure
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JPH0384513A (en) * 1989-08-29 1991-04-10 Ricoh Co Ltd Lens holding structure for optical writing means
JPH07175000A (en) * 1993-12-20 1995-07-14 Fuji Xerox Co Ltd Lens mounting structure
JPH1172734A (en) * 1997-08-29 1999-03-16 Ricoh Co Ltd Light beam scanning device
JP2000131583A (en) * 1998-10-22 2000-05-12 Minolta Co Ltd Structure for holding optical member
JP2000292729A (en) * 1999-04-08 2000-10-20 Ricoh Co Ltd Optical scanner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007298684A (en) * 2006-04-28 2007-11-15 Brother Ind Ltd Scanning optical apparatus
JP2013242415A (en) * 2012-05-21 2013-12-05 Konica Minolta Inc Laser-scanning optical device, and image forming apparatus
US8963979B2 (en) 2012-05-21 2015-02-24 Konica Minolta, Inc. Fixing structure for fixing optical element, laser scanning apparatus, image forming apparatus, and method for fixing optical element
JP2016001228A (en) * 2014-06-11 2016-01-07 株式会社リコー Lens unit, image reading device, and image forming apparatus
JP2015129949A (en) * 2015-01-31 2015-07-16 株式会社リコー Mirror curve adjustment mechanism, optical writing device, and image forming apparatus

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