JPS5923336A - Optional magnification changing device of optical system of copying machine or the like - Google Patents
Optional magnification changing device of optical system of copying machine or the likeInfo
- Publication number
- JPS5923336A JPS5923336A JP13409682A JP13409682A JPS5923336A JP S5923336 A JPS5923336 A JP S5923336A JP 13409682 A JP13409682 A JP 13409682A JP 13409682 A JP13409682 A JP 13409682A JP S5923336 A JPS5923336 A JP S5923336A
- Authority
- JP
- Japan
- Prior art keywords
- magnification
- optical system
- cam
- imaging lens
- moved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/041—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with variable magnification
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は複写機等の光学系、特にフラッシュ露光光学系
の任意倍率変更装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical system such as a copying machine, and particularly to an arbitrary magnification changing device for a flash exposure optical system.
従来、フラッシュ光学系を有する複写機等に於いて原稿
像の倍率を任意無段階に変化させる為には、ズーム・レ
ンズを用いるのが一般的であったが、これは光学系のコ
ストを極めて高価なものとする欠点があった。その為結
像レンズの位置と共に原稿載置台ガラスの位置も変化さ
ぜることによって任意無段階の倍率変更を行う光学系を
備えた複写機が提案されているが、前記原稿載１ｉ？ｊ
台ガラスと前記結像レンズを個別に移動する必要がある
ことから、本方式も少なからず複雑高価になるという問
題があった。In the past, it was common to use a zoom lens to change the magnification of the original image steplessly in copiers and other devices equipped with a flash optical system, but this greatly increased the cost of the optical system. It had the disadvantage of being expensive. For this reason, a copying machine has been proposed that is equipped with an optical system that can change the magnification in any stepless manner by changing the position of the image forming lens as well as the position of the document table glass. j
Since it is necessary to move the base glass and the imaging lens separately, this method also has the problem of being complicated and expensive.
本発明は上述のような原稿載置台ガラス及び結像レンズ
双方を光学系の共役関係を維持しつつ適宜移動し、任意
無段階に倍率変更を行う光学系の問題を解決する為にな
されたものであって、前記原稿載置台ガラスを前記光学
系の倍率変換に伴う共役長の変化が回転角に対する回転
中心から外周までの距離の変化に等しい形状を有するカ
ムによって上下に移動させると共に、前記結像レンズを
前記カムの回転軸の回転角とｌ：１に対応するよう上下
に移動するようＫした複写機光学系等の任意倍率変更装
置を提供することを目的とする。The present invention was made in order to solve the problem of an optical system in which the magnification is arbitrarily and steplessly changed by appropriately moving both the original table glass and the imaging lens while maintaining the conjugate relationship of the optical system. The original table glass is moved up and down by a cam having a shape in which a change in conjugate length due to magnification conversion of the optical system is equal to a change in distance from the center of rotation to the outer periphery with respect to a rotation angle, and It is an object of the present invention to provide an arbitrary magnification changing device for an optical system of a copying machine, etc., in which an image lens is moved up and down so as to correspond to the rotation angle of the rotation axis of the cam and l:1.
以下、本発明を実施例を示す図面によって詳細に鱈兄明
する。Hereinafter, the present invention will be explained in detail with reference to drawings showing embodiments.
第１図は本発明を適用する光学系の配置を示す模式図で
ある。即ち、上下移動可能の原稿載置台ガラス１と固定
した結像平面、例えば電子写真感光体２との間に固定焦
点距離ｆの結像レンズ３を配置したものであって、図示
を省略したフラッシュ光原によって前記原稿載置台ガラ
ス１上に整置した原稿像を前記感光体２０表面に所定の
倍率で投影するものである。FIG. 1 is a schematic diagram showing the arrangement of an optical system to which the present invention is applied. That is, an imaging lens 3 with a fixed focal length f is disposed between a vertically movable original table glass 1 and a fixed imaging plane, such as an electrophotographic photoreceptor 2, and a flash (not shown) is provided. The image of the original placed on the original platen glass 1 is projected onto the surface of the photoreceptor 20 at a predetermined magnification using a light source.
而して前記原稿載置台ガラス１と前記結像レンズ３との
距離をａ、前記結像レンズ３と前記感光体２との距離を
ｂとすれば、結像条件は周知の如＜ ｌ／ａ ＋ １／
ｂ ＝ ｘ／ｒ を満足する必要があり、又この場合
の倍率ｍ ＝ ｂ／ａ である。そこで倍率ｍを任意
に変更する場合、前記距離す及びａ ＋ ｂは倍率ｍに
よってどのように変化するかを検討すると、前記２つの
式の簡単な変形によって１）−（ｍ＋１ ）−１−ｆ、
ａ十ｂ−（ｍ＋１ ）７ｍ−ｆとなることがわかる。If the distance between the document table glass 1 and the imaging lens 3 is a, and the distance between the imaging lens 3 and the photoreceptor 2 is b, then the imaging conditions are as well known <l/ a + 1/
It is necessary to satisfy b = x/r, and the magnification in this case is m = b/a. Therefore, when changing the magnification m arbitrarily, considering how the distances a and a + b change depending on the magnification m, by simple modification of the above two equations, 1)-(m+1)-1-f ,
It can be seen that a+b−(m+1)7m−f.
第２図は、これらを代表的な倍率毎に計η６した表であ
り、これをグラフに描くとｉｎ ：３図のμｍ」くなる
。FIG. 2 is a table in which the total η6 is calculated for each typical magnification, and when this is plotted on a graph, it becomes in: 3 μm in the figure.
ＩＪＩＩら、前記原稿載置台ガラス１ ｋＪ−倍率変化
に「↑りい、幾分複雑な二次曲りを描くよう移動する必
些があるが、前記結像レンズ３は倍率変化に夕、」シ、
直線的な上下移動を行えばよいことが＋’ｔ＋る。IJII et. ,
It's good to know that all you have to do is move up and down in a straight line.
以上の；４祭から、前記原稿載置台１は嫡仁υｌプロフ
ァイルを有するカムで上下に移動するようにし、該カム
の回転軸の回転角と倍率とを１：１に対応きせると共に
前記カムの回転軸によって面接前記結像レンズを移動す
れば極めて簡Ｊ１５な機構で任意無段階変倍可能な光学
系が得らり、ることに想到するであろう。From the above 4th stage, the document mounting table 1 is moved up and down by a cam having a legitimate profile, and the rotation angle of the rotation axis of the cam corresponds to the magnification of 1:1, and the If the surface imaging lens is moved by a rotation axis, it will be possible to obtain an optical system capable of variable magnification at any step with an extremely simple mechanism.
第４図は上述の発想を具体化した本発明の複写機光学系
の任意倍率変更装置の構成を示す一部破断側面図である
。FIG. 4 is a partially cutaway side view showing the configuration of an arbitrary magnification changing device for an optical system of a copying machine according to the present invention, which embodies the above-mentioned idea.
即ち、原稿載置台ガラス１に周辺枠４をイ；」すると共
に該周辺枠の内縁近傍に遮光筒５をＩ＋！・ｊ定する。That is, the peripheral frame 4 is placed on the original table glass 1, and the light-shielding tube 5 is placed near the inner edge of the peripheral frame.・Determine.
前記遮光筒５は前記原稿載置台ガラス１に対面する部分
及び核部の対面側が全面的に開１」シでおり、前記原稿
載置台ガラス１上に整置した原稿面を下方から望むよう
になっている。The light-shielding tube 5 is completely open at the portion facing the original platen glass 1 and the side facing the core, so that the surface of the original placed on the original platen glass 1 can be viewed from below. It has become.
又、前記遮光筐４の内面にその各辺に沿ってフラッシュ
舎ランプ６．６・・・０を適当な形状の笠７ 、７ ＊
＠６＠を介して固定し、前記原稿を全面均一な照度で照
射するよう構成する。In addition, flash lamps 6, 6...0 are installed on the inner surface of the light-shielding case 4 along each side of the shade 7, 7* of an appropriate shape.
It is fixed via @6@, and the original is configured to be irradiated with uniform illuminance over the entire surface.
又、前記原稿載置台ガラス１め周辺枠体４の四隅に回転
自在のカム・フォロワ８，８・・・・を設け、該カム・
フォロワ８，８・・・・ｉｒｆ下に回動自在に配置した
２本のカム＋＋ｑｈ ９及び１０に夫々結合したカム１
１ 、１１’及び１２ 、１２’と係合せしめる。In addition, rotatable cam followers 8, 8, etc. are provided at the four corners of the first peripheral frame 4 of the original table glass, and the cam followers 8, 8, . . .
Followers 8, 8... Two cams rotatably arranged under irf ++qh Cam 1 coupled to 9 and 10, respectively
1, 11' and 12, 12'.
更に前記カム軸９及び１０けその端部に於いて固定する
図示を省略した傘歯車及び前記カム軸９及び１０と直交
する回動軸１３を介してブレーキを内蔵するモータ１４
によって回転するよう構成する。Furthermore, a motor 14 having a built-in brake is provided via a bevel gear (not shown) fixed at the end of the camshafts 9 and 10 and a rotation shaft 13 orthogonal to the camshafts 9 and 10.
Configure it to rotate by.
尚、更に前記カム軸９及び１ｏには夫々プーリｉ ｓ
、 ｉ ｓ’及び１６ 、１６’を固定すると共にこれ
らに夫々ケーブル１γ、１１１及び１８ 、１ Ｂ’の
一端を巻回１！！ｄ定しておく。Furthermore, pulleys are provided on the camshafts 9 and 1o, respectively.
, is' and 16, 16' are fixed, and one end of the cable 1γ, 111 and 18, 1B' is wound around these, respectively. ! d.
一方、前記遮光筐５の外周にこれと密接摺動可能な中間
遮光筒１９を配置し、該中間遮光筒１９の中央部に結像
レンズ３を固定した。（へ元板２ｏを取り付ける。On the other hand, an intermediate light-shielding tube 19 that can closely slide on the outer periphery of the light-shielding housing 5 is arranged, and the imaging lens 3 is fixed to the center of the intermediate light-shielding tube 19. (Attach the base plate 2o.
更に、前記中間遮光筒１９の外周中火）１１１に１咳筐
１９を列降させる場合のガイド係合′ｔＸＩＩ利を固定
し、その四Ｉ’ｌｌ！に摺動メタル２２，２２−・・・
を嵌装した孔を設け、該部にガイド・ロッド２３，２３
・・・・を通す。Furthermore, the guide engagement when lowering the first housing 19 on the outer periphery of the intermediate light-shielding tube 19 is fixed, and the four I'll! sliding metal 22, 22-...
A hole is provided in which the guide rod 23, 23 is inserted.
Pass through...
前記ガイド・ロッド２３，２３・・φ・け図示を省略し
た機械のフレームにその一端を固定すると共に、他端と
前記ガイド保合部伺２１との間をコイル・スプリング２
４．２４− ・・で抑圧する。One end of the guide rod 23, 23, .
4.24- Suppress with...
又、前記ガイド保合部材１９の四隅近傍に前記カム軸９
及び１０に固定したグー！Ｊ １５ 、１５’及び１６
、１６’から延びるケーブル１７ 、１７’及び１８
、１８’の他端を結合する。Further, the cam shaft 9 is provided near the four corners of the guide holding member 19.
and Goo fixed at 10! J 15 , 15' and 16
, 16' extending from cables 17, 17' and 18
, 18' are joined at the other ends.
最後に前記中間遮光筐１９の内周に密着し、前記中間遮
光筐１９を摺動自在とする固定光筐２５をその下端開口
に極めて近接して走行する感光体ベルト２の上方に固定
するよう構成したものである。Finally, a fixed optical housing 25 that is in close contact with the inner periphery of the intermediate light shielding housing 19 and that allows the intermediate light shielding housing 19 to freely slide is fixed above the photoreceptor belt 2 that is running very close to its lower end opening. It is composed of
以上説明したように構成する本発明の任意倍率変更装置
は以下に述べるように動作する。The arbitrary magnification changing device of the present invention configured as described above operates as described below.
今、オペレータがある１Ｊ：意の複写倍率を設定せんと
して、図示を省略した機械のコントロール・パネル上の
倍率設定ボタンを抑圧すると、前記モータ１４が回転し
て前記カム６１１９及び１０に固定したカム１１ 、１
１’及び１２ 、１２’を相互に反対方向に回動する。Now, when an operator wants to set a desired copying magnification and presses a magnification setting button on the control panel of the machine (not shown), the motor 14 rotates and the cams fixed to the cams 6119 and 10 11, 1
1' and 12, 12' are rotated in opposite directions.
前記カム１１ 、１１’及び１２゜１２１ｅよ夫々形状
が対称であってしかも前述した如く、前記カム軸の回転
角に対する回転中心からの距離の関係が前記第３図の曲
線（ａ十ｂ）を満足するような外周プロファイルを有し
ているから前記原稿載置台ガラス１は所要の高さだけ上
昇する。The shapes of the cams 11, 11' and 12°121e are symmetrical, and as mentioned above, the relationship between the rotation angle of the camshaft and the distance from the center of rotation is similar to the curves (a and b) in FIG. Since it has a satisfactory outer circumferential profile, the document table glass 1 can be raised by the required height.
同時に前記カム軸９及び１０に固定したプーリ１５゜１
５１及び１６ 、１６’も回動し、これらに固定した前
記ケーブル１７．１７′＆び１ Ｂ 、 １８’も夫々
巻き上げられるので前記結像レンズ３を固定した中間遮
光筐１９も前記ガイド・ロッド２３，２３・・・−に沿
ってこれに設けたスプリング２４．２４・・・・に抗し
て上昇する。この土！１．ハ＋−１よ前記プーリ１５
、１５’及び１６ 、１６’の直径を適切に設削するこ
とによって前述の第３図に示す直線（＋、）の変化を満
足するものであることをよいつまでもない。At the same time, pulleys 15°1 fixed to the camshafts 9 and 10
51, 16, 16' are also rotated, and the cables 17, 17' and 1B, 18' fixed thereto are also wound up, respectively, so that the intermediate light-shielding housing 19 to which the imaging lens 3 is fixed is also connected to the guide rod. 23, 23...- and rises against the springs 24, 24... provided thereon. This soil! 1. Ha+-1, said pulley 15
, 15' and 16, 16', the change in the straight line (+,) shown in FIG. 3 can be satisfied.
斯くして前記原稿載置台ガラス１及び前ｉ己結像レンズ
３が所定ｌｄ、移動した時、オペレータがＭＩＪ記スイ
ッチ’ｆ： ＷＥ放すｉＬば前記モータ１４が（・７；
止すると同時にブレーキが働き本ｙＣ学系し」、ノツ「
望の倍率に対応する共役長に設定固定さ）１だことにな
る。In this way, when the original platen glass 1 and the front self-imaging lens 3 have moved by a predetermined distance, if the operator releases the MIJ switch 'f:WE', the motor 14 will move (.7;
The brakes work at the same time as you stop the machine.
The conjugate length corresponding to the desired magnification is set and fixed at 1).
尚、前記ガイド・ロッド２３に設Ｕノだスノ°＋） ７
グ２４は必ずしも必要ではなく、前「尼結像レンズ３を
備えた中間遮光筐１９の自１１で前記ケーブル１７ 、
１７’及び１８ 、１８’を緊張芒ぜでおいてもよい。In addition, the guide rod 23 is provided with a hole (+) 7
The cable 17 is not necessarily required;
17', 18, and 18' may be placed in a tension awn.
又、前記中間遮光筐１９の昇降は必ずしもケーブルによ
る必要もなく、例えば前記カムＩＩ！１１９及び１０の
他端に更に夫々傘歯車を設け、こｊｔを介して雄ネジを
設けた回転軸を垂下せしめ、前記ガイド保合部拐２１に
設けた雌ネジと係合させるような構成をとってもよい。Further, the intermediate light-shielding housing 19 does not necessarily need to be moved up and down by a cable; for example, the cam II! Further, bevel gears are provided at the other ends of 119 and 10, and a rotating shaft provided with a male screw is suspended through the shaft, and the rotating shaft is engaged with a female screw provided on the guide retaining portion 21. Very good.
このような構成を用いれば、前記モータ１４にはブレー
キが不要となると共に、ケーブルの弛緩に伴うメンテナ
ンスが不要となる等、コスト低減上有利であろう。If such a configuration is used, the motor 14 does not require a brake, and maintenance associated with loosening of the cable becomes unnecessary, which is advantageous in terms of cost reduction.
さて、以上述べた如く構成する本発明の倍率変更装置に
於いては、第４図に示すとうり倍率変更に伴い像は常に
前記原稿載置台ガラス直下の中央部に点線を示すように
結ｆ象することになることが判る。Now, in the magnification changing device of the present invention constructed as described above, as shown in FIG. It turns out that it will become a symbol.
このことは、本発明を複写機に適用する場合幾分都合の
悪い問題を生ずる。This creates a somewhat inconvenient problem when applying the invention to a copying machine.
即ち、最近の複写機の用紙搬送系は、用紙搬送路の奥側
で用紙の位置合わせを行うのが一般的であるから、これ
に適用するためには結像レンズを前記原稿載置台ガラス
の対角線に沿って移動する必要がある。In other words, in the paper conveyance system of recent copying machines, it is common to align the paper on the back side of the paper conveyance path, so in order to apply this, the imaging lens must be placed above the original platen glass. It is necessary to move along the diagonal.
そこで倍率と結像レンズの移動量との関係を検討するに
第６図に示す関係を求めればよいことが理解されよう。Therefore, it will be understood that when considering the relationship between the magnification and the amount of movement of the imaging lens, the relationship shown in FIG. 6 should be obtained.
即ち、結像レンズ３の前記原ｒｔ＋載１？Ｙ０台ガラス
１の１ｌｔｌｌ縁に沿って測る移動量ｔ＋ｔＪ１、Ｌｘ
： ｔ＋＝（ｎ＋ｂ）：ａ＝（１＋ｍ）ａ ：ａｔｙ
＝ （１−ｍ ）・Ｌ／２
故にｔ、 −（ｌ ｍ）／（１＋＋ｎ）・、Ｌ／２で
ある。That is, the original rt+1 of the imaging lens 3? Movement amount t+tJ1, Lx measured along the 1ltll edge of Y0 stand glass 1
: t+=(n+b):a=(1+m)a:aty
= (1-m)·L/2 Therefore, t, −(l m)/(1++n)·, L/2.
ここで、実際に前記原稿載置台ガラス１の利用線上を移
動する値を２とし、前記原稿載置台ガラス１のサイズを
Ａ３４０当とすると、その長辺と短辺の比は１．４ ：
１であるから、Ｚ ＝ 、／’Ｔ’＋１．４２１、で
ある。この結像レンズの移ｊＢυ−ｔｉｊ Ｚと培率ｍ
との１」係を代表的な倍率についてｙ ｔ−＋’）Ｊ−
ると第７図のようになる。父、これｆ：前述のグラフ（
第３図）上でプロットするとゆるいカーブの曲＋ｔ６１
となることが判る。Here, if the value of the actual movement on the usage line of the original platen glass 1 is 2, and the size of the original platen glass 1 is A340, the ratio of the long side to the short side is 1.4:
1, so Z = , /'T'+1.421. The movement of this imaging lens jBυ−tij Z and the magnification m
1'' with typical magnification y t-+') J-
The result will be as shown in Figure 7. Father, this f: The above graph (
Figure 3) When plotted above, the song has a gentle curve + t61
It turns out that
結像レンズを上述の関係を満足させつつ移動するにｔよ
例えば第８図及び第９図に夫々−ＩＳ＋＋ ｒ波断側面
図及び平面図で示すような機構を用いＪＬはよい。In order to move the imaging lens while satisfying the above-mentioned relationship, it is best to use a mechanism such as that shown in FIGS. 8 and 9, which are respectively a -IS++ r-wave cross-sectional side view and a plan view.
即ち、前記中間遮光筐１９内部の遮光板２０にその対角
線に沿って所要の幅と長さを有する長孔２Ｇを穿設し、
該長孔２６の両端に夫々ブロック２７．２ｒを配置する
と共に、該ブロック２７゜２γの間にレール２８．２８
を固定し、前記結像レンズ３を前記レール上で移動しつ
るよう構成する。That is, a long hole 2G having a required width and length is bored in the light shielding plate 20 inside the intermediate light shielding case 19 along its diagonal,
Blocks 27.2r are arranged at both ends of the elongated hole 26, and rails 28.28 are arranged between the blocks 27°2γ.
is fixed, and the imaging lens 3 is configured to move and hang on the rail.
前記結像レンズ３にはこれを固定すると共に前記レール
２８，２８との係合部を備えた移動ブロック２９を取付
け、該ブロック２９０両側から短ロッド状のカム・フォ
ロワ３０．３（ｌ突出せしめる。A movable block 29 is attached to the imaging lens 3, which fixes it and has an engaging portion with the rails 28, 28, and a short rod-shaped cam follower 30.3 (l) protrudes from both sides of the block 290. .
一方、前記固定遮光筐２５の内壁適所から、前記中間遮
光筐１９内の遮光板２０を垂直に貫通するよう２箇のカ
ム・プレート３１．３１を突出させ、該カム・プレー）
３１．３１に穿孔した礼状カム３２．３２と前記カム・
７オロワ３０．３０を夫々係合せしめるようにすれば、
前記中間遮光筐１９の移動に伴い前記結像レンズ３も所
要量移動することになる。On the other hand, two cam plates 31 and 31 are made to protrude from appropriate positions on the inner wall of the fixed light-shielding case 25 so as to vertically penetrate the light-shielding plate 20 in the intermediate light-shielding case 19.
Thank you letter cam 32.32 drilled in 31.31 and the said cam.
If 7 rowers 30 and 30 are engaged respectively,
As the intermediate light-shielding housing 19 moves, the imaging lens 3 also moves by a required amount.
尚、前記カム３１．３１の形状は前述の式％式％
と前述のｂ ＝ （＋ｎ＋１ ） ｆ とを同時に満
足するようＮＯミルを用いて加工すれば容易に得ること
が可能である。The shape of the cam 31.31 can be easily obtained by machining using an NO mill so as to satisfy the above-mentioned formula % and the above-mentioned b = (+n+1) f at the same time.
更に、前記カム・プレート３１．３１がｊ′（通摺接す
る前記遮光板２０の孔内壁にｔよビロードのような多毛
布を貼着し、両者の慴動を助りると共に光の漏洩を防止
するようにするがよい。Furthermore, a velvety polyurethane cloth is pasted on the inner wall of the hole in the light shielding plate 20 where the cam plates 31 and 31 come into sliding contact with each other to facilitate sliding movement between the two and to prevent light leakage. Try to prevent it.
又、前記遮光板２０下面に密接して配置ｆｉ、Ｌ、前記
結像レンズ３の外枠に固定した板３２ ｔＪ：前記遮光
板２゛０に穿設した結像レンズ移動用の長孔を遮蔽し、
ブ０の漏洩を防止するスライド式遮光板である。Further, fi and L are arranged closely on the lower surface of the light shielding plate 20, and a plate 32 tJ is fixed to the outer frame of the imaging lens 3. shield,
This is a sliding type light shielding plate that prevents leakage of light.
本発明は以上説明した如く構成し、かつ動作するので複
写機、プリンタ等の９笈倍率μにブＣ１系の倍率を極め
てＩ）ｉｉ単な機構によって任意多段に液化することが
可能となるので、複写機等のコストを上列させることな
く豊富な機能全イ・Ｊ−Ｉシする上で著しい効果を発揮
する。Since the present invention is constructed and operates as described above, it is possible to increase the magnification of the C1 system to the 9 magnification μ of copying machines, printers, etc., and to liquefy it in arbitrary multiple stages with a simple mechanism. It is extremely effective in providing all of the abundant functions without increasing the cost of copying machines, etc.
第１図は本発明に係る任意倍率変更装置の結像光学系の
各パラメータを説明する模式図、第２図は倍率に対する
前記各パラメータの変化を代表的な倍率毎にｉｌＷ、し
た結果を示す表、第３図は第２図の結果をプｐッ卜した
グラフ、第４図は本発明に係る任意倍率変更装置をフラ
ッシュ露光系を備えた複写機に適用した一実施例を示す
一部破断側面図、ｆＡ’ｒ、５図は倍率変更時の像の位
置ｆ：説明する図、第６図は倍率変更時の像の位置を感
光体の奥側に移動させる為の結像レンズ移！ｌ１ＩＩ量
を説明する模式図、第７図は代表的倍率に於ける結像レ
ンズの移動層の計算結果を示す表、第８図及び第９図は
夫々結像レンズ移動装置の一実施例を示す一部破断側面
図及び平面図である。
図 中
１・・・原稿載置台ガラス、３・・・結像レンズ、１１
．（１１’）及び１２．（１２つ・・・カム、９．１０
・・・カムの回転軸。
％詐出願人 富士ゼロックス株式会社第１図
第２ｔ！Ｊ
第４Ｎ
第５図
第 ６ 図
第７図
第８図
第９１．：／１Fig. 1 is a schematic diagram illustrating each parameter of the imaging optical system of the arbitrary magnification changing device according to the present invention, and Fig. 2 shows the results of ilW changes in each of the above parameters for each representative magnification. The table, FIG. 3 is a graph showing the results of FIG. 2, and FIG. 4 is a part showing an example in which the arbitrary magnification changing device according to the present invention is applied to a copying machine equipped with a flash exposure system. A cutaway side view, fA'r, Fig. 5 is an explanatory diagram of the image position f when the magnification is changed, and Fig. 6 is the imaging lens movement to move the image position to the back side of the photoreceptor when the magnification is changed. ! A schematic diagram explaining the amount of l1II, FIG. 7 is a table showing the calculation results of the moving layer of the imaging lens at typical magnifications, and FIGS. 8 and 9 each show an example of the imaging lens moving device. FIG. 2 is a partially cutaway side view and a plan view. In the figure 1...Original table glass, 3...Imaging lens, 11
．． (11') and 12. (12... cam, 9.10
...The rotation axis of the cam. % Fraudulent Applicant Fuji Xerox Co., Ltd. Figure 1
2nd t! J 4N Figure 5 Figure 6 Figure 7 Figure 8 Figure 91. :/1
Claims (1)
関係を維持しつつ移動して任意の像倍率を得る光学系に
於いて、前記原稿載置台ガラスを前記光学系の倍率変換
に伴う共役長の変化が回転角に対する回転中心からの外
周までの距離の変化に等しいプロファイルを有するカム
によって上下に移動させると共に前記結像レンズを前記
カムの回転軸の回転角に対応して上下に移動させるよう
にしたことを特徴とする複写機光学系等の任意倍率変更
装置。In an optical system in which an arbitrary image magnification is obtained by moving the positions of the document table glass and the imaging lens while maintaining the conjugate relationship of the optical system, the document table glass is moved to a conjugate position due to the magnification conversion of the optical system. The imaging lens is moved up and down by a cam having a profile in which the change in length is equal to the change in distance from the rotation center to the outer periphery with respect to the rotation angle, and the imaging lens is moved up and down in accordance with the rotation angle of the rotation axis of the cam. An arbitrary magnification changing device for a copying machine optical system, etc., characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13409682A JPS5923336A (en) | 1982-07-30 | 1982-07-30 | Optional magnification changing device of optical system of copying machine or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13409682A JPS5923336A (en) | 1982-07-30 | 1982-07-30 | Optional magnification changing device of optical system of copying machine or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5923336A true JPS5923336A (en) | 1984-02-06 |
Family
ID=15120338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13409682A Pending JPS5923336A (en) | 1982-07-30 | 1982-07-30 | Optional magnification changing device of optical system of copying machine or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5923336A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5360374A (en) * | 1990-07-23 | 1994-11-01 | David Wyon | Apparatus for desks |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5241860U (en) * | 1975-09-17 | 1977-03-25 | ||
| JPS52133211A (en) * | 1976-05-01 | 1977-11-08 | Ishida Sangyo Kk | Method and device for magnifying or reducing character or drawing or the like |
| JPS58192024A (en) * | 1982-04-28 | 1983-11-09 | ゼロツクス・コ−ポレ−シヨン | Lighting/image formation apparatus for copying machine |
-
1982
- 1982-07-30 JP JP13409682A patent/JPS5923336A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5241860U (en) * | 1975-09-17 | 1977-03-25 | ||
| JPS52133211A (en) * | 1976-05-01 | 1977-11-08 | Ishida Sangyo Kk | Method and device for magnifying or reducing character or drawing or the like |
| JPS58192024A (en) * | 1982-04-28 | 1983-11-09 | ゼロツクス・コ−ポレ−シヨン | Lighting/image formation apparatus for copying machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5360374A (en) * | 1990-07-23 | 1994-11-01 | David Wyon | Apparatus for desks |
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