JPH03168715A - Image forming lens holding device of optical scanning device - Google Patents
Image forming lens holding device of optical scanning deviceInfo
- Publication number
- JPH03168715A JPH03168715A JP30973589A JP30973589A JPH03168715A JP H03168715 A JPH03168715 A JP H03168715A JP 30973589 A JP30973589 A JP 30973589A JP 30973589 A JP30973589 A JP 30973589A JP H03168715 A JPH03168715 A JP H03168715A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- scanning
- held
- elastic force
- optical
- 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
- 230000003287 optical effect Effects 0.000 title claims description 28
- 238000003384 imaging method Methods 0.000 claims description 30
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 210000003644 lens cell Anatomy 0.000 abstract description 15
- 238000010586 diagram Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Laser Beam Printer (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は光走査装置における結像レンズ保持装置に関す
る．
［従来の技術］
光源装置からの略平行な光束を主走査対応方向に長い線
像として結像させ、上記線像の近傍に偏向反射面を持つ
偏向装置により反射光束を偏向させ、偏向光束をアナモ
フィックな結像レンズにより被走査面上に光スポットと
して結像させて光走査を行う光走査装置は従来から知ら
れている．第６図はこのような光走査装置の１例を略示
している．この図は、光源から被走査面に到る光学配置
を光路に沿って展開し、副走査方向が上下方向になるよ
うに描いたものである．
光源としてのＬＤＩから放射された発散性の光束はコリ
メートレンズ２により略平行光束化される．ＬＤＩとコ
リメートレンズ２とは光源装置を構成している．
この光源装置からの略平行な光束は副走査対応方向にの
み正のパワーを持つシリンダーレンズ３の作用により、
偏向装置である回転多面鏡４の偏向反射面の近傍に抗し
て副走査対応方向に長い線像として結像される．
偏向反射面による反射光束は回転多面′Ｒ４の回転によ
り偏向する。この偏向光束は結像レンズを構戊する３枚
のレンズ５，６．７の作用により被走査面８上に光スポ
ットとして結像する。偏向光束の偏向に伴い被走査面８
が光走査される。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an imaging lens holding device in an optical scanning device. [Prior Art] A substantially parallel light beam from a light source device is imaged as a long line image in a direction corresponding to main scanning, and the reflected light beam is deflected by a deflection device having a deflection reflecting surface near the line image. Optical scanning devices that perform optical scanning by focusing an optical spot on a surface to be scanned using an anamorphic imaging lens have been known for some time. FIG. 6 schematically shows an example of such an optical scanning device. This figure shows the optical arrangement from the light source to the scanned surface developed along the optical path, with the sub-scanning direction being the vertical direction. The diverging light beam emitted from the LDI as a light source is converted into a substantially parallel light beam by the collimating lens 2. The LDI and collimating lens 2 constitute a light source device. The substantially parallel light flux from this light source device is caused by the action of the cylinder lens 3 which has positive power only in the sub-scanning direction.
A long line image is formed in the direction corresponding to the sub-scanning direction against the vicinity of the deflection reflection surface of the rotating polygon mirror 4, which is a deflection device. The light beam reflected by the deflection reflecting surface is deflected by the rotation of the rotating polygon 'R4. This deflected light beam forms an image as a light spot on the scanned surface 8 by the action of three lenses 5, 6.7 forming an imaging lens. Due to the deflection of the deflected light beam, the surface to be scanned 8
is optically scanned.
このような構或にすると偏向装置による偏向反射面のｒ
面倒れ」の影響を補正できる。しかし結像レンズは、副
走査対応方向のパワーを主走査対応方向のパワーに比し
て強くしないと偏向光束を被走査面上に光スポットとし
て結像させることができない。このため結像レンズはア
ナモフイックなレンズとなる．
［発明が解決しようとする課Ｍ］
結像レンズがこのようにアナモフィックであると、アナ
モフィックな面を持つレンズが光軸方向の周りに適正な
方向から回転していると光スポットの走査軌跡が設計上
の主走査方向に対して傾いてしまう。またアナモフィッ
クな面を持つレンズの光軸が適正な位置から副走査対応
方向にずれていると上記走査軌跡が直線とならず曲がっ
てしまう．このような走査軌跡の「傾き」や「曲がり」
は光走査に悪影響し，光走査の良好性を損なう。With such a structure, the r of the deflection reflection surface by the deflection device
It is possible to compensate for the effects of "carelessness". However, the imaging lens cannot image the deflected light beam as a light spot on the surface to be scanned unless the power in the direction corresponding to the sub-scanning is made stronger than the power in the direction corresponding to the main scanning. Therefore, the imaging lens becomes an anamorphic lens. [Problem M to be solved by the invention] When the imaging lens is anamorphic in this way, when the lens with an anamorphic surface is rotated from an appropriate direction around the optical axis direction, the scanning locus of the light spot changes. It is tilted with respect to the designed main scanning direction. Furthermore, if the optical axis of a lens with an anamorphic surface deviates from its proper position in the direction corresponding to sub-scanning, the scanning trajectory described above will not be a straight line but will be curved. Such "tilt" and "curvature" of the scanning trajectory
adversely affects optical scanning and impairs the quality of optical scanning.
上記走査軌跡の「傾きや曲がり」は結像レンズの保持態
位の狂いに原因があるから、結像レンズ保持装置は走査
軌跡の傾きや曲がりを補正できるようにレンズの保持態
位を調整できるものであることが望ましい．
結像レンズの保持態位を調整できるようにした結像レン
ズ保持装置は，実開昭６３−１００７１６号公報等、種
々提案されているが走査軌跡の曲がりと傾きの双方をｇ
ｍできるものはない。The "tilting and bending" of the scanning trajectory mentioned above is caused by the incorrect holding position of the imaging lens, so the imaging lens holding device can adjust the holding position of the lens to correct the tilting and bending of the scanning trajectory. It is desirable that the Various imaging lens holding devices that can adjust the holding position of the imaging lens have been proposed, such as Japanese Utility Model Application No. 100716/1983.
There is nothing that can be done.
本発明は上述した事情に鑑みてなされたもの４であって
、光スポットの走査軌跡の傾きと曲がりとを共に補正す
ることができる新規な結像レンズ保持装置の提供を目的
とする．
［課題を解決するための手段］
以下、本発明を説明する．
本発明の結像レンズ保持装置は「光源装置からの略平行
な光束を主走査対応方向に長い線像として結像させ、上
記線像の近傍に偏向反射面を持つ偏向装置により反射光
束を偏向させ、偏向光束をアナモフィックな結像レンズ
により被走査面上に光スポットとして結像させて光走査
を行う光走査装置」に於いて，上記結像レンズを保持す
る装置である．上記偏向装置は回転多面鏡、ガルバノミ
ラーやビラミダルミラ一等、偏向反射面の面倒れが問題
となる偏向装置を用いることができる。The present invention has been made in view of the above-mentioned circumstances.It is an object of the present invention to provide a novel imaging lens holding device capable of correcting both the inclination and curvature of the scanning locus of a light spot. [Means for Solving the Problems] The present invention will be explained below. The imaging lens holding device of the present invention focuses a substantially parallel light beam from a light source device as a long line image in a direction corresponding to main scanning, and deflects the reflected light beam by a deflection device having a deflection reflection surface near the line image. This is a device that holds the above-mentioned imaging lens in an optical scanning device that performs optical scanning by imaging the deflected light beam as a light spot on the surface to be scanned using an anamorphic imaging lens. As the deflecting device, a rotating polygon mirror, a galvano mirror, a biramidal mirror, or the like, which has a problem of tilting of the deflecting reflection surface, can be used.
結像レンズ保持装置は「保持枠と、弾性部材と、１対の
変位手段と」を有する．
「保持枠』は、結像レンズの内少なくとも、アナモフィ
ックな面を持つレンズを、光軸直交方向に於いて動き得
るように「遊隙」を持たせて保持する．
「弾性部材」は、保持枠内に保持されたレンズに副走査
対応方向への弾性力を作用させる．「１対の変位手段」
は，保持枠に保持されたレ査対応方向の２箇所で互いに
独立に作用させる。The imaging lens holding device includes a holding frame, an elastic member, and a pair of displacement means. The "holding frame" holds at least one of the imaging lenses, which has an anamorphic surface, with a "gap" so that it can move in a direction perpendicular to the optical axis. The "elastic member" applies an elastic force in the sub-scanning direction to the lens held within the holding frame. "A pair of displacement means"
are applied independently from each other at two locations in the review-compatible direction held by the holding frame.
［作 用］
第５図を参照すると，この図は第６図に即して説明した
結像レンズを示している．
３枚のレンズ５，６．７の内，最も被走査面側にあるレ
ンズ７がアナモフイックな面を有するものとし、このレ
ンズ７の保持誤差により光スポットの走査軌跡の曲がり
や傾きが生ずるものとすると，走査軌跡の「曲がり」を
補正するにはレンズ７を矢印ｌ６で示す副走査対応方向
に於いて微妙に平行移動させる必要があるし，走査軌跡
の「傾き」を補正するにはレンズ７をレンズ光軸の回り
に矢印１５で未すように微妙に回転させて調整する必要
がある。[Operation] Referring to Fig. 5, this figure shows the imaging lens described in conjunction with Fig. 6. Among the three lenses 5, 6, and 7, the lens 7 closest to the surface to be scanned has an anamorphic surface, and the holding error of this lens 7 is assumed to cause bending or inclination of the scanning locus of the light spot. Then, in order to correct the "curvature" of the scanning trajectory, it is necessary to slightly move the lens 7 in parallel in the direction corresponding to the sub-scanning indicated by the arrow l6, and to correct the "tilt" of the scanning trajectory, the lens 7 must be moved in parallel. It is necessary to adjust the angle by slightly rotating it around the optical axis of the lens as indicated by the arrow 15.
本発明の結像レンズ保持装置では、保持枠は遊隙をもっ
てレンズを保持するから、保持されたレンズは光軸直交
方向に動き得る．
保持枠に保持されたレンズには、弾性部材からの弾性力
とｌ対の変位手段からの力が作用し、これらの力の釣り
合いによりレンズの態位が決定される。In the imaging lens holding device of the present invention, since the holding frame holds the lens with play, the held lens can move in a direction perpendicular to the optical axis. An elastic force from an elastic member and a force from one pair of displacement means act on the lens held by the holding frame, and the attitude of the lens is determined by the balance of these forces.
１対の変位手段による力は副走査方向へ作用するから、
この力の作用により「保持されたレンズ」を副走査方向
へ平行移動させることができる。Since the force by the pair of displacement means acts in the sub-scanning direction,
Due to the action of this force, the "held lens" can be moved in parallel in the sub-scanning direction.
また１対の変位手段の力は「主走査対応方向の２箇所で
互いに独立に」作用させることができるので各力の大き
さを変えることで、保持されたレンズに回転的な変位を
与えることができる。In addition, the forces of the pair of displacement means can be applied "independently from each other at two locations in the main scanning direction," so by changing the magnitude of each force, rotational displacement can be applied to the held lens. Can be done.
［実施例］ 以下、具体的な実施例に即して説明する。[Example] Hereinafter, description will be given based on specific examples.
光走査装置としては第６図に即して説明したものを想定
し、第５図に示した結像レンズを保持する例を上げる。Assuming that the optical scanning device is the one described with reference to FIG. 6, an example will be given in which the imaging lens shown in FIG. 5 is held.
結像レンズを構成するレンズ５，６．７の内でレンズ７
がアナモフィックな面を持ち、このレンズ７の態位を可
調整に保持するのである．第ｌ図に於いて、符号９はレ
ンズセルを示す。Lens 7 among lenses 5 and 6.7 constituting the imaging lens
has an anamorphic surface and maintains the position of this lens 7 in an adjustable manner. In FIG. 1, reference numeral 9 indicates a lens cell.
結像レンズを構成する３枚のレンズはいずれもレンズセ
ル９に保持されるが、レンズ５と６とは共に光軸合わせ
され位置調整された状態でレンズセル９に固定される．
そしてアナモフイツクなレンズ面を持つレンズ７が、こ
れらレンズ５，６に対して相対的に位置合わせされる．
レンズセル９には天板１３が固定ねじ５０Ａと５０Ｂに
より固定されている。レンズセル９と、これに固定され
た天板ｌ３とは枠部材を構或し、レンズ７はレンズセル
９と天板１３により形威された空間に遊隙を持って保持
される．レンズセル９にはまた弾性部材としての板ばね
ｌ２が固定ねじ１７により固定され，板ばね１２はレン
ズ７の下方の面に弾性力を作用させる．
一方，天板１３には調整用ネジ１４ａと１４ｂが螺装さ
れており、これら調整用ねじ１４ａ ，１４ｂの先端部
はレンズ７の天板側の端面に当接している。これら調整
ねじ１４ａ ，１４ｂは、この実施例に於いてｌ対の変
位手段を構成している．
なお、第１図で符号５０Ｃはレンズ７の左右方向の動き
を規制する板ばね部材を示す。また符号ＩＯは、光源た
るＬＤとコリメートレンズとシリンダーレンズ、すなわ
ち第６図で回転多面鏡４の光源側にある光学系をユニッ
ト化したもので、固定手段５００によりレンズセル９に
固定される。All three lenses constituting the imaging lens are held in the lens cell 9, and both lenses 5 and 6 are fixed to the lens cell 9 with their optical axes aligned and their positions adjusted.
A lens 7 having an anamorphic lens surface is then positioned relative to these lenses 5 and 6. A top plate 13 is fixed to the lens cell 9 with fixing screws 50A and 50B. The lens cell 9 and the top plate l3 fixed thereto constitute a frame member, and the lens 7 is held with a gap in the space defined by the lens cell 9 and the top plate 13. A leaf spring l2 as an elastic member is also fixed to the lens cell 9 by a fixing screw 17, and the leaf spring 12 exerts an elastic force on the lower surface of the lens 7. On the other hand, adjustment screws 14a and 14b are screwed onto the top plate 13, and the tips of these adjustment screws 14a and 14b abut against the end surface of the lens 7 on the top plate side. These adjusting screws 14a and 14b constitute one pair of displacement means in this embodiment. In FIG. 1, reference numeral 50C indicates a leaf spring member that restricts the movement of the lens 7 in the left-right direction. Further, reference numeral IO designates a unit of an LD serving as a light source, a collimating lens, and a cylinder lens, that is, an optical system located on the light source side of the rotating polygon mirror 4 in FIG. 6, and is fixed to the lens cell 9 by a fixing means 500.
第２図は、レンズセル９と天板１３による保持枠に保持
されたレンズ７の状態を簡略化して示している。図の上
下方向が副走査対応方向，左右方向が主走査対応方向で
ある。FIG. 2 shows a simplified state of the lens 7 held in a holding frame made up of the lens cell 9 and the top plate 13. The vertical direction in the figure is the direction corresponding to sub-scanning, and the horizontal direction is the direction corresponding to main scanning.
レンズ７には板ばね１２による弾性力が図の下側から上
方へ向かって作用する．また、１対の変位手段をなすｌ
［用ねじ１４ａ ，１４ｂは主走査対応方向の２箇所に
於いてレンズ７に当接している．！Ｉ！＋整用ねじ１４
ａ ，１４ｂの力は板ばね１２の弾性力に釣り合う．第
２図（１）はレンズ７が保持枠に中立的に保持された状
態を示している。この状態から調整用ねじ１４ａ ，１
４ｂを送ってレンズ７を変位させることができる。調整
用ねじ１４ａ ，１４ｂの送り量を同一にすればレンズ
は副走査対応方向へ平行移動する。The elastic force of the leaf spring 12 acts on the lens 7 from the bottom to the top in the figure. In addition, l forming a pair of displacement means
[The screws 14a and 14b are in contact with the lens 7 at two locations in the main scanning direction. ! I! + maintenance screw 14
The forces of a and 14b balance the elastic force of the leaf spring 12. FIG. 2(1) shows a state in which the lens 7 is neutrally held by the holding frame. From this state, adjust screws 14a, 1
4b can be sent to displace the lens 7. If the feed amounts of the adjusting screws 14a and 14b are made the same, the lens will move in parallel in the direction corresponding to the sub-scanning.
第２図（ＩＩ）はこのような平行移動を行わせた状態を
示している．この平行移動によりレンズ７の光軸をレン
ズ５，６の光軸の副走査方向の高さに合致させることが
でき、このような平行移動による調整により走査軌跡の
曲がりを補正できる。Figure 2 (II) shows a state in which such parallel movement is performed. By this parallel movement, the optical axis of the lens 7 can be made to match the height of the optical axes of the lenses 5 and 6 in the sub-scanning direction, and the curve of the scanning locus can be corrected by adjustment by such a parallel movement.
第３図ＣＩ）は、レンズ７の副走査方向に於ける平行移
動に応じて走査軌跡の曲がりがどのように変化するかを
示す図である．
第２図（ＩＩＩ）は、調整用ねじ１４ａの送り量を「負
」、調整用ねじ１４ｂの送り量を「正」としてレンズ７
を時計方向へ回転的に変位させた状態を示している。FIG. 3 CI) is a diagram showing how the curvature of the scanning locus changes depending on the parallel movement of the lens 7 in the sub-scanning direction. FIG. 2 (III) shows the lens 7 when the feed amount of the adjustment screw 14a is "negative" and the feed amount of the adjustment screw 14b is "positive".
The figure shows a state in which is rotationally displaced clockwise.
このようなレンズ７の回転により光スポットの走査軌跡
は第３図（ＩＩ）のように変化する．この図でレンズ７
の「傾き」とは、「偏向面」即ち偏向光束の主光線によ
り理想的に掃引される面に対するレンズ７の主径線の傾
きを意味する。レンズセルの組付け誤差やレンズ７の製
造誤差等により、レンズ７の主径線と偏向面の平行度に
狂いがでるのでレンズ７の回転によりこの狂いを補正し
て走査線の傾きを除去することができる．
変形実施例
第４図に変形実施例を５例挙げる．繁雑を避けるため、
混同の恐れがないと思われるものに就いては第２図に於
けると同一の符号を用いた。Due to such rotation of the lens 7, the scanning locus of the light spot changes as shown in FIG. 3 (II). In this diagram, lens 7
The "tilt" means the tilt of the principal axis of the lens 7 with respect to the "deflection plane", that is, the plane ideally swept by the chief ray of the deflected light beam. Due to assembly errors of the lens cell, manufacturing errors of the lens 7, etc., the parallelism between the main diameter line of the lens 7 and the deflection plane is out of alignment, so this deviation is corrected by rotating the lens 7 and the inclination of the scanning line is removed. be able to. Modified Examples Figure 4 shows five modified examples. To avoid congestion,
The same reference numerals as in Figure 2 have been used for items for which there is no risk of confusion.
第４図（ａ）に示す例は、上述した実施例に於ける板ば
ねに代えて，１対のスプリングプランジャ−１８ａ，１
８ｂを弾性部材として用いた例である。The example shown in FIG. 4(a) has a pair of spring plungers 18a, 1 instead of the leaf spring in the above-described embodiment.
8b is used as an elastic member.
第４図（ｂ）に示す例では、板ばねｌ２を天板１３の側
に設け，１対のくさび状台１９ａ ，１９ｂと調整用ね
じ２０ａ，ｌＯｂにより１対の変位手段を構成した。In the example shown in FIG. 4(b), a leaf spring l2 is provided on the side of the top plate 13, and a pair of displacement means is constituted by a pair of wedge-shaped bases 19a and 19b and adjustment screws 20a and lOb.
調整用ねじ２０ａ ， ２０ｂによりくさび状台１９ａ
，１９ｂを左右方向へ変位させることによりレンズ７の
態位を調整できる。Wedge-shaped base 19a is adjusted by adjusting screws 20a and 20b.
, 19b in the left-right direction, the attitude of the lens 7 can be adjusted.
第４図（Ｃ）に示す例では、第４図（ｂ）に示す例に於
けるくさび状台と調整用ねじの組み合わせに代えて、先
端にテーパーの付いた一対の調整用ねじ２１ａ，２ｌｂ
によりｌ対の変位手段を構成した。In the example shown in FIG. 4(C), a pair of adjusting screws 21a and 2lb with tapered tips are used instead of the combination of a wedge-shaped base and an adjusting screw in the example shown in FIG. 4(b).
This constituted one pair of displacement means.
第４図（ｄ）に示す例では、第４図（ｃ）に示す例に於
ける調整用ねじ２１ａ ，２ｌｂに代えて、１対のレパ
−２２ａ，２２ｂと１対の調整用ねじ２３ａ ， ２３
ｂとにより１対の変位手段が構成されている。In the example shown in FIG. 4(d), instead of the adjusting screws 21a and 2lb in the example shown in FIG. 4(c), a pair of levers 22a and 22b and a pair of adjusting screws 23a are used. , 23
b constitute a pair of displacement means.
第４図（ｂ） ， （Ｃ） ， （ｄ）の実施例では、
いずれもｌ対の調整用ネジを「正」の方向（ねじ込む向
き）に進めることによりレンズ７が図面上方へ変位し、
各調整用ねじの送り量を異ならせることによりレンズ７
を回転的に変位させることができる。In the embodiments shown in FIGS. 4(b), (C), and (d),
In both cases, the lens 7 is displaced upward in the drawing by advancing the l pair of adjustment screws in the "positive" direction (screwing direction).
Lens 7 can be adjusted by changing the feed amount of each adjustment screw.
can be rotationally displaced.
第４図（ｅ）に示す例では、第４図（ｃ）に示す例に於
ける調整用ねじ２１ａ，２ｌｂに代えて，１対のすり割
り付き偏心ピン２４ａ ， ２４ｂにより１対の変位手
段が構成されている。In the example shown in FIG. 4(e), a pair of displacement means is provided by a pair of slotted eccentric pins 24a, 24b in place of the adjustment screws 21a, 2lb in the example shown in FIG. 4(c). is configured.
［発明の効果］
以上、本発明によれば光走査装置における新規な結像レ
ンズ保持装置を提供できる。[Effects of the Invention] As described above, according to the present invention, a novel imaging lens holding device in an optical scanning device can be provided.
この装置は上記の如く構成されているから、結像レンズ
の態位の狂いにより発生する光スポットの走査軌跡の「
曲がり」および「傾き」を何れも有効に補正することが
できる．従って、良好な光走査を実現できる．
なお、上の実施例に於いて結像レンズを構成する複数の
レンズの内の一つのみを調整可能としたが，２以上のレ
ンズを態位調整可能とできることは言うまでもない．Since this device is configured as described above, the scanning locus of the light spot generated due to the misalignment of the imaging lens is
Both "curvature" and "tilt" can be effectively corrected. Therefore, good optical scanning can be achieved. In the above embodiment, only one of the plurality of lenses constituting the imaging lens is adjustable, but it goes without saying that two or more lenses can be adjusted in attitude.
第ｌ図は、本発明の１実施例を説明する分解斜視図、第
２図は、上記実施例を説明するための図、第３図は、レ
ンズの変位と走査軌跡の変化の関係を説明するための図
、第４図は，変形実施例を５例示す図，第５図および第
６図は、発明の解決課題を説明するための図である．
７．．．結像レンズの内でアナモフィックな面を持つレ
ンズ、９．．．レンズセル、１３．．．レンズセルとと
もに保持枠を構或する天板、１２．．．弾性部材として
の板ばね、１４ａ，１４ｂ．．．１対の変位手段を構成
形Ｚ四
売Ｃ起
ｚ １！！４曽Ｃ斗一ノFigure 1 is an exploded perspective view for explaining one embodiment of the present invention, Figure 2 is a diagram for explaining the above embodiment, and Figure 3 is for explaining the relationship between lens displacement and change in scanning locus. FIG. 4 is a diagram showing five modified embodiments, and FIGS. 5 and 6 are diagrams for explaining the problems to be solved by the invention. 7. ．． ．． 9. A lens with an anamorphic surface among the imaging lenses; ．． ．． Lens cell, 13. ．． ．． 12. A top plate that forms a holding frame together with the lens cell; 12. ．． ．． Leaf springs as elastic members, 14a, 14b. ．． ．． Constructing a pair of displacement means Z four sales C z 1! ! 4so C Toichino
Claims (1)
像として結像させ、上記線像の近傍に偏向反射面を持つ
偏向装置により反射光束を偏向させ、偏向光束をアナモ
フィックな結像レンズにより被走査面上に光スポットと
して結像させて光走査を行う光走査装置に於いて、上記
結像レンズを保持する装置であって、 結像レンズの内少なくとも、アナモフィックな面を持つ
レンズを、光軸直交方向に動き得るように遊隙を持たせ
て保持する保持枠と、 この保持枠内に保持されたレンズに副走査対応方向への
弾性力を作用させる弾性部材と、上記保持されたレンズ
を上記弾性力に抗して副走査対応方向へ変位させる力を
上記保持されたレンズに、主走査対応方向の２箇所で互
いに独立に作用させる１対の変位手段とを有することを
特徴とする結像レンズ保持装置。[Scope of Claims] A substantially parallel light beam from a light source device is imaged as a long line image in a direction corresponding to main scanning, and the reflected light beam is deflected by a deflection device having a deflection reflecting surface near the line image, thereby forming a deflected light beam. In an optical scanning device that performs optical scanning by forming an optical spot on a surface to be scanned using an anamorphic imaging lens, a device for holding the imaging lens, wherein at least one of the imaging lenses is an anamorphic one. A holding frame that holds a lens with a flat surface with a gap so that it can move in a direction perpendicular to the optical axis, and an elastic force that applies an elastic force in a direction corresponding to sub-scanning to the lens held within this holding frame. and a pair of displacement means for applying a force to the held lens at two locations in the main scanning direction independently of each other to displace the held lens in the sub-scanning direction against the elastic force. An imaging lens holding device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30973589A JP2931342B2 (en) | 1989-11-29 | 1989-11-29 | Imaging lens holding device in optical scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30973589A JP2931342B2 (en) | 1989-11-29 | 1989-11-29 | Imaging lens holding device in optical scanning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03168715A true JPH03168715A (en) | 1991-07-22 |
| JP2931342B2 JP2931342B2 (en) | 1999-08-09 |
Family
ID=17996668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30973589A Expired - Fee Related JP2931342B2 (en) | 1989-11-29 | 1989-11-29 | Imaging lens holding device in optical scanning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2931342B2 (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH049014U (en) * | 1990-03-26 | 1992-01-27 | ||
| JP2000111821A (en) * | 1998-10-02 | 2000-04-21 | Konica Corp | Scanning optical device and image forming device |
| JP2002296473A (en) * | 2001-03-29 | 2002-10-09 | Ricoh Opt Ind Co Ltd | Multi-beam source unit and optical scanner having the same |
| EP1391770A1 (en) * | 2002-08-23 | 2004-02-25 | Samsung Electronics Co., Ltd. | Sub-scanning interval adjusting device for multi-beam image forming apparatus |
| JP2005258450A (en) * | 2005-03-22 | 2005-09-22 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
| JP2006184667A (en) * | 2004-12-28 | 2006-07-13 | Pentax Corp | Tandem laser scanning unit |
| JP2006215397A (en) * | 2005-02-04 | 2006-08-17 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
| JP2006323356A (en) * | 2005-04-20 | 2006-11-30 | Ricoh Co Ltd | Scanning optical system, optical scanning device, and image forming apparatus |
| US7151556B2 (en) | 2002-08-23 | 2006-12-19 | Samsung Electronics Co., Ltd. | Sub-scanning interval adjusting apparatus for multi-beam scanning unit |
| JP2007164205A (en) * | 2007-01-09 | 2007-06-28 | Ricoh Co Ltd | Optical scanner and image forming device with the optical scanner mounted thereon |
| US7535594B2 (en) | 2003-02-25 | 2009-05-19 | Ricoh Company, Limited | Scanning lens for optical scanner, optical scanner, and image forming apparatus |
| JP2010008761A (en) * | 2008-06-27 | 2010-01-14 | Sharp Corp | Optical scanner and image-forming device equipped with the same |
| JP2010085963A (en) * | 2008-09-05 | 2010-04-15 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
| US8004552B2 (en) | 2008-06-27 | 2011-08-23 | Sharp Kabushiki Kaisha | Optical scanning device and image forming apparatus |
| JP2013037342A (en) * | 2011-07-11 | 2013-02-21 | Canon Inc | Method of assembling and adjusting multi-beam scanning optical apparatus and method of manufacturing multi-beam scanning optical apparatus |
| WO2018135454A1 (en) * | 2017-01-23 | 2018-07-26 | 日本電産コパル株式会社 | Imaging device |
-
1989
- 1989-11-29 JP JP30973589A patent/JP2931342B2/en not_active Expired - Fee Related
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH049014U (en) * | 1990-03-26 | 1992-01-27 | ||
| JP2000111821A (en) * | 1998-10-02 | 2000-04-21 | Konica Corp | Scanning optical device and image forming device |
| US6512533B2 (en) * | 1998-10-02 | 2003-01-28 | Konica Corporation | Image forming apparatus |
| US6677973B2 (en) | 1998-10-02 | 2004-01-13 | Konica Corporation | Image forming apparatus |
| US6924830B2 (en) | 1998-10-02 | 2005-08-02 | Konica Corporation | Image forming apparatus |
| JP2002296473A (en) * | 2001-03-29 | 2002-10-09 | Ricoh Opt Ind Co Ltd | Multi-beam source unit and optical scanner having the same |
| JP4739560B2 (en) * | 2001-03-29 | 2011-08-03 | リコー光学株式会社 | Multi-beam light source unit and optical scanning device having the same |
| US7151556B2 (en) | 2002-08-23 | 2006-12-19 | Samsung Electronics Co., Ltd. | Sub-scanning interval adjusting apparatus for multi-beam scanning unit |
| EP1391770A1 (en) * | 2002-08-23 | 2004-02-25 | Samsung Electronics Co., Ltd. | Sub-scanning interval adjusting device for multi-beam image forming apparatus |
| US7050083B2 (en) | 2002-08-23 | 2006-05-23 | Samsung Electronics Co., Ltd. | Sub-scanning interval adjusting apparatus for multi-beam laser scanning unit |
| US7535594B2 (en) | 2003-02-25 | 2009-05-19 | Ricoh Company, Limited | Scanning lens for optical scanner, optical scanner, and image forming apparatus |
| JP4668606B2 (en) * | 2004-12-28 | 2011-04-13 | Ｈｏｙａ株式会社 | Tandem laser scanning unit |
| JP2006184667A (en) * | 2004-12-28 | 2006-07-13 | Pentax Corp | Tandem laser scanning unit |
| JP2006215397A (en) * | 2005-02-04 | 2006-08-17 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
| JP2005258450A (en) * | 2005-03-22 | 2005-09-22 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
| JP4675247B2 (en) * | 2005-04-20 | 2011-04-20 | 株式会社リコー | Scanning optical system, optical scanning device, and image forming apparatus |
| JP2006323356A (en) * | 2005-04-20 | 2006-11-30 | Ricoh Co Ltd | Scanning optical system, optical scanning device, and image forming apparatus |
| JP4571157B2 (en) * | 2007-01-09 | 2010-10-27 | 株式会社リコー | Optical scanning apparatus and image forming apparatus equipped with the same |
| JP2007164205A (en) * | 2007-01-09 | 2007-06-28 | Ricoh Co Ltd | Optical scanner and image forming device with the optical scanner mounted thereon |
| JP4565021B2 (en) * | 2008-06-27 | 2010-10-20 | シャープ株式会社 | Optical scanning device and image forming apparatus having the same |
| JP2010008761A (en) * | 2008-06-27 | 2010-01-14 | Sharp Corp | Optical scanner and image-forming device equipped with the same |
| US8004552B2 (en) | 2008-06-27 | 2011-08-23 | Sharp Kabushiki Kaisha | Optical scanning device and image forming apparatus |
| JP2010085963A (en) * | 2008-09-05 | 2010-04-15 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
| JP2013037342A (en) * | 2011-07-11 | 2013-02-21 | Canon Inc | Method of assembling and adjusting multi-beam scanning optical apparatus and method of manufacturing multi-beam scanning optical apparatus |
| WO2018135454A1 (en) * | 2017-01-23 | 2018-07-26 | 日本電産コパル株式会社 | Imaging device |
| JP2018120020A (en) * | 2017-01-23 | 2018-08-02 | 日本電産コパル株式会社 | Imaging device |
| CN110199213A (en) * | 2017-01-23 | 2019-09-03 | 日本电产科宝株式会社 | Filming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2931342B2 (en) | 1999-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH03168715A (en) | Image forming lens holding device of optical scanning device | |
| JPS61185716A (en) | Optical beam scanner | |
| US20040239752A1 (en) | Multibeam scanning apparatus | |
| GB2096789A (en) | Optical mechanical scanning system | |
| US5638189A (en) | Raster scanner, mirror supporting structure of the same and method for adjusting mirror angle using the structure | |
| US5218461A (en) | Scanning optical apparatus | |
| JPH0455291Y2 (en) | ||
| JP4677657B2 (en) | Scanning optical device | |
| JP3844161B2 (en) | Optical scanning device | |
| JP2713625B2 (en) | Image forming device | |
| JP2709949B2 (en) | Drawing surface adjustment mechanism of scanning type drawing device | |
| JPH02282715A (en) | Optical deflector | |
| JPS61295526A (en) | Photoscanner | |
| JP2772556B2 (en) | Scanning optical device | |
| JP2772555B2 (en) | Scanning optical device | |
| JP2557938B2 (en) | Light beam scanning device with tilt correction function | |
| JPH1172734A (en) | Light beam scanning device | |
| JPH0618335Y2 (en) | Beam scanning device | |
| JP2004070312A (en) | Multi-beam scanner | |
| JPH0417925Y2 (en) | ||
| JPH0614186Y2 (en) | Beam scanning device | |
| JPH07181412A (en) | Multibeam scanner | |
| JPH03130716A (en) | Scanning optical device | |
| JP2001194614A (en) | Optical scanner | |
| JPH02269305A (en) | Optical scanner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |