JP2578349B2 - Image reading device - Google Patents
Image reading deviceInfo
- Publication number
- JP2578349B2 JP2578349B2 JP63048643A JP4864388A JP2578349B2 JP 2578349 B2 JP2578349 B2 JP 2578349B2 JP 63048643 A JP63048643 A JP 63048643A JP 4864388 A JP4864388 A JP 4864388A JP 2578349 B2 JP2578349 B2 JP 2578349B2
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- Prior art keywords
- image
- reflecting mirror
- lens
- optical axis
- document
- Prior art date
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Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、画像読取装置、特に表裏同時読取系と片面
読取系の光学系を共有する画像読取装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus, and more particularly to an image reading apparatus that shares an optical system of a simultaneous reading system for front and back sides and a single-side reading system.
（従来の技術） 従来、このような画像読取装置としては、第６図に示
すような画像読取装置100がある。101は表面にアルファ
ベットAB、裏面にアルファベットCDが印刷された原稿で
ある。原稿101は第１反射鏡102、第２反射鏡103の交差
する交差角を２等分する光軸上に配置される。光軸の延
長上に第３反射鏡104が備えられており、第３反射鏡104
で反射された光は、レンズ105を介してフィルム106上に
投影されるようになっている。(Prior Art) Conventionally, as such an image reading apparatus, there is an image reading apparatus 100 as shown in FIG. An original 101 has an alphabet AB printed on the front and an alphabet CD printed on the back. The document 101 is arranged on an optical axis that bisects the intersection angle of the first reflecting mirror 102 and the second reflecting mirror 103. A third reflecting mirror 104 is provided on the extension of the optical axis.
Is reflected on the film 106 via the lens 105.
このように構成された画像読取装置100によれば、原
稿101とフィルム106とは同期して図中矢印方向に移動さ
れる。その際原稿１の画像ABを光源（図示せず）によっ
て照明し、その反射光を第１反射鏡102で反射する。第
１反射鏡102で反射された反射光は第３反射鏡104で反射
されレンズ105でフィルム106上にスリット投影する。一
方、画像ABの裏側に描かれた画像CDは第２反射鏡103で
反射され、第２反射鏡103で反射された反射光は第３反
射鏡で反射され、レンズ105でフィルム106に投影され
る。このように第１反射鏡102及び第２反射鏡103及び第
３反射鏡104で夫々反射された画像ABと画像CDは、フィ
ルム106上に並列に並んで投影されるようになってい
る。According to the image reading apparatus 100 configured as described above, the document 101 and the film 106 are moved in the direction of the arrow in FIG. At that time, the image AB of the document 1 is illuminated by a light source (not shown), and the reflected light is reflected by the first reflecting mirror 102. The light reflected by the first reflecting mirror 102 is reflected by the third reflecting mirror 104 and is projected by a lens 105 on a film 106 by slitting. On the other hand, the image CD drawn on the back side of the image AB is reflected by the second reflecting mirror 103, and the reflected light reflected by the second reflecting mirror 103 is reflected by the third reflecting mirror and projected on the film 106 by the lens 105. You. The images AB and CD reflected by the first reflecting mirror 102, the second reflecting mirror 103, and the third reflecting mirror 104 are projected side by side on the film 106 in parallel.
（発明が解決しようとする問題点） しかしながら、上記従来技術による画像読取装置100
によれば、必要に応じて原稿101の片面の画像CDのみを
フィルム106上に投影しようとする場合、画像AB側の光
路に遮光板等を入れABの反射光の光路を遮断するか画像
AB側の照明を消すことにより画像ABをフィルム106上に
到達しないようにする。しかしながら、このように画像
CDのみをフィルム106上に投影すると、有効部のうち片
側だけに片寄って投影されるとともに、フィルムの有効
部に対して小さく投影されるという問題がある。(Problems to be Solved by the Invention) However, the image reading apparatus 100 according to the related art described above.
According to the above, when only the image CD of one side of the document 101 is to be projected onto the film 106 as necessary, a light shielding plate or the like is inserted in the optical path on the image AB side to block the optical path of the reflected light of AB or
By turning off the light on the AB side, the image AB is prevented from reaching the film 106. However, this way the image
When only the CD is projected onto the film 106, there is a problem that the projected portion is shifted to only one side of the effective portion and is also small projected to the effective portion of the film.
本発明は上記問題に鑑みなされたもので、その目的と
するところは、片面画像をフィルムなどの感光部材の有
効部中心に大きく投影し、操作、制御特性の向上した画
像読取装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an image reading apparatus in which a single-sided image is largely projected on the center of an effective portion of a photosensitive member such as a film to improve operation and control characteristics. It is in.
（問題点を解決するための手段） 上記目的を有する本発明は、移動する原稿の表面画像
と裏面画像を感光部材に投影するための結像光学系と、
前記結像光学系と原稿の間に配置され、照明された原稿
の表面画像と裏面画像とを上下の向きを揃えて感光部材
の幅方向の中央を挟んで並べて投影するように前記結像
光学系に導く複数の反射鏡とを備え、原稿の片面画像の
みを感光部材に投影する時に片面画像が感光部材の中央
に投影するように結像光学系の光軸を移動させる光軸移
動手段を設けたことを特徴とする。(Means for Solving the Problems) According to the present invention having the above object, an image forming optical system for projecting a front surface image and a back surface image of a moving document onto a photosensitive member,
The image forming optical system is disposed between the image forming optical system and the document, and the front side image and the back side image of the illuminated document are aligned and projected so as to be vertically aligned and sandwich the center in the width direction of the photosensitive member. A plurality of reflecting mirrors leading to the system, and an optical axis moving means for moving the optical axis of the imaging optical system so that the one-sided image is projected onto the center of the photosensitive member when only the one-sided image of the document is projected on the photosensitive member. It is characterized by having been provided.
また、前記光軸移動手段は反射鏡を移動することによ
り光軸を移動させるとよい。Further, the optical axis moving means may move the optical axis by moving a reflecting mirror.
また、前記光軸移動手段は結像光学系を変更すること
により光軸を移動させることもできる。Further, the optical axis moving means can move the optical axis by changing an imaging optical system.
さらに、前記結像光学系は原稿の表裏両面読取時と片
面読取時に異なる投影倍率で画像を感光部材に投影する
とよい。Further, the image forming optical system may project an image onto the photosensitive member at a different projection magnification when reading the front and back sides of the document and when reading the single side.
（作用） 而して、本発明の画像読取装置によれば、原稿の表裏
同時読取時には原稿の画像ABを光源によって照明し、第
１反射鏡と第３反射鏡で反射し、レンズで感光部材とし
てのフィルム上の一方の側にスリット投影する。同様
に、原稿の裏面側の画像CDは第２反射鏡と第３反射鏡と
で反射しレンズ７でフィルム上の他方の側にスリット投
影する。この場合フィルム上にはAB,CDの画像が並列に
投影される。(Operation) According to the image reading apparatus of the present invention, the image AB of the document is illuminated by the light source during the simultaneous reading of the front and back of the document, reflected by the first and third reflecting mirrors, and the photosensitive member by the lens. Slit projection on one side on the film as. Similarly, the image CD on the back side of the document is reflected by the second reflecting mirror and the third reflecting mirror, and is slit-projected by the lens 7 on the other side of the film. In this case, AB and CD images are projected on the film in parallel.
次に片面読取時には、第３反射鏡が所定位置に移動す
る。原稿１の画像CDは第２反射鏡と第３反射鏡で反射
し、レンズでフィルム６にスリット投影する。この場合
のレンズは表裏同時読取時のレンズと別のレンズか、表
裏同時読取時のレンズにアタッチメントレンズを付加す
るか、又は２焦点レンズとするが光軸は一致させる。片
面読取時のフィルム上の画像が大きくなるように投影倍
率を表裏同時読取時と比較して大きくとる。このように
して片面の画像をフィルム有効部中心に大きく投影する
ことができる。Next, at the time of one-sided reading, the third reflecting mirror moves to a predetermined position. The image CD of the original 1 is reflected by the second reflecting mirror and the third reflecting mirror, and is slit-projected on the film 6 by the lens. In this case, the lens is different from the lens used for simultaneous reading of the front and back surfaces, an attachment lens is added to the lens used for simultaneous reading of the front and back surfaces, or a bifocal lens is used, but the optical axes are made to coincide. The projection magnification is set to be larger than that at the time of simultaneous reading on the front and back sides so that the image on the film at the time of single-sided reading becomes large. In this way, an image on one side can be largely projected on the center of the effective film portion.
（実 施 例） 以下、本発明を図示の実施例に基づいて説明する。(Embodiment) Hereinafter, the present invention will be described based on the illustrated embodiment.
第１図に本発明における画像読取装置を示し、１は画
像形成装置全体を示す。1aは、両面に画像を備える原稿
である。原稿1aは表面にアルファベット文字ABが、裏面
にアルファベット文字CDが印刷されているものとする。
原稿1aの表面に対向する側に第１反射鏡２が配置されて
おり原稿1aの裏面に対向する側に第２反射鏡３が配置さ
れている。第１反射鏡２と第２反射鏡３とはある角度を
有して一端部が接している。又、４は原稿1aの両面を反
射する第３反射鏡であり、第１反射鏡及び第２反射鏡と
の間の距離を調整しうる反射鏡移動装置に接続されてい
る。FIG. 1 shows an image reading apparatus according to the present invention, and 1 shows the entire image forming apparatus. 1a is a manuscript having images on both sides. It is assumed that the original 1a has the alphabet letters AB printed on the front side and the alphabet letters CD printed on the back side.
A first reflecting mirror 2 is disposed on a side facing the front surface of the document 1a, and a second reflecting mirror 3 is disposed on a side facing the back surface of the document 1a. The first reflecting mirror 2 and the second reflecting mirror 3 are in contact at one end with an angle. Reference numeral 4 denotes a third reflecting mirror that reflects both sides of the document 1a, and is connected to a reflecting mirror moving device that can adjust the distance between the first reflecting mirror and the second reflecting mirror.
一方、結像光学系として、第１レンズ５及び第２レン
ズ９を備える。第２レンズ９は、第１レンズ５と別体の
レンズとし、第１レンズ５にアタッチメントレンズを付
加するか、あるいは第１レンズ５及び第２レンズ９を同
一のものとした場合、２焦点を有するレンズとする。投
影倍率は、片面読取時の原稿面の倍率を、両面読取時の
原稿面の倍率より大きくし、片面読取時の画像を大きく
投影するようになっている。また、７は光軸であり、６
は感光部材としてのフィルムである。On the other hand, a first lens 5 and a second lens 9 are provided as an imaging optical system. The second lens 9 is a separate lens from the first lens 5, and an attachment lens is added to the first lens 5, or if the first lens 5 and the second lens 9 are the same, the two focal points are set. Lens. The projection magnification is such that the magnification of the original surface during single-sided reading is greater than the magnification of the original side during double-sided reading, and the image during single-sided reading is projected large. 7 is an optical axis;
Denotes a film as a photosensitive member.
このように構成された画像読取装置１は次のように作
動する。すなわち、表裏同時読取時には、原稿1aの画像
ABは図示しない光源によって照明し、第１反射鏡２と第
３反射鏡４で反射し結像光学系としての第１レンズ５で
フィルム６上にスリット投影する。一方裏側の画像CDは
同様に光源によって照明し、第２反射鏡３と第３反射鏡
４で反射し、第１レンズ５でフィルム６上にスリット投
影する。原稿１上の光軸は点12にある。この場合、フィ
ルム６上には光軸７とフィルム６の交点でつくられる仮
想線10を挟んで第３図の様に画像が投影される。表裏同
時読取系の光学系は、第１反射鏡２、第２反射鏡３、第
３反射鏡４及び第１レンズ５とからなる。The image reading apparatus 1 configured as above operates as follows. That is, when reading the front and back simultaneously, the image of the original 1a is
AB is illuminated by a light source (not shown), is reflected by the first reflecting mirror 2 and the third reflecting mirror 4, and is slit-projected on the film 6 by the first lens 5 as an imaging optical system. On the other hand, the image CD on the back side is similarly illuminated by the light source, reflected by the second reflecting mirror 3 and the third reflecting mirror 4, and slit-projected on the film 6 by the first lens 5. The optical axis on document 1 is at point 12. In this case, an image is projected on the film 6 with an imaginary line 10 formed at the intersection of the optical axis 7 and the film 6 as shown in FIG. The optical system of the front and back simultaneous reading system includes a first reflecting mirror 2, a second reflecting mirror 3, a third reflecting mirror 4, and a first lens 5.
次に、片面読取時には、第３反射鏡４は光学移動手段
によって点線で書かれた第３反射鏡４の位置に移動す
る。第２レンズ９の光軸は移動した第３反射鏡４から原
稿１の間では第１図中に点線で示した様になる。原稿１
の画像CDは第２反射鏡３と移動後の第３反射鏡４で反射
し、第２レンズ９でフィルム６上にスリット投影する。
第４図はフィルム６に投影された画像である。片面読取
系の光学系は、第２反射鏡３、第３反射鏡４及び第２レ
ンズ９によって構成される。第３反射鏡４の位置は、原
稿サイズや第３反射鏡４の配置角度をもとに、原稿１の
中心がフィルム６の中心に一致する様に決定される。本
実施例においては移動方向は第１図では光路長が短くな
る場合を説明したが、第２レンズ９の画角、第２レンズ
９の移動距離・焦点距離の変化量等を考慮して光路長が
長くなる様に移動しても良い。但し、原稿１の読取画像
は、反対側のABとなる。Next, at the time of one-side reading, the third reflecting mirror 4 is moved to the position of the third reflecting mirror 4 written by a dotted line by the optical moving means. The optical axis of the second lens 9 between the moved third reflecting mirror 4 and the original 1 is as shown by the dotted line in FIG. Manuscript 1
The image CD is reflected by the second reflecting mirror 3 and the third reflecting mirror 4 after the movement, and is slit-projected on the film 6 by the second lens 9.
FIG. 4 is an image projected on the film 6. The optical system of the one-sided reading system includes the second reflecting mirror 3, the third reflecting mirror 4, and the second lens 9. The position of the third reflecting mirror 4 is determined based on the size of the document and the arrangement angle of the third reflecting mirror 4 so that the center of the document 1 coincides with the center of the film 6. In the present embodiment, the case where the moving direction is such that the optical path length becomes short in FIG. 1 has been described. However, the optical path is considered in view of the angle of view of the second lens 9 and the amount of change in the moving distance and focal length of the second lens 9. You may move so that length may become long. However, the read image of the original 1 is the opposite AB.
第５図に本発明の第２実施例を示す。1aは両面又は片
面に画像のある原稿、原稿1aはそれぞれ第１反射鏡２及
び第２反射鏡３で反射される。第１反射鏡２及び第２反
射鏡３は画像を第１レンズ５及び第２レンズ９によって
投影する。６は画像を記録するマイクロフィルム、7,11
は、それぞれ第１レンズ５及び第２レンズ９の光軸であ
る。また原稿1aとフィルム６は同期してスリット走査さ
れるようになっている。FIG. 5 shows a second embodiment of the present invention. 1a is an original having images on both sides or one side, and the original 1a is reflected by the first reflecting mirror 2 and the second reflecting mirror 3, respectively. The first reflecting mirror 2 and the second reflecting mirror 3 project an image by the first lens 5 and the second lens 9. 6 is a microfilm for recording an image, 7, 11
Is the optical axis of the first lens 5 and the second lens 9, respectively. The original 1a and the film 6 are slit-scanned synchronously.
このような画像読取装置１では表裏同時読取時には原
稿1aの片側の画像は図示しない光源によって照明され、
第１反射鏡２で反射し、第１レンズ５でフィルム６にス
リット投影する。一方反対側の画像は同様に照明し第２
反射鏡３で反射し第１レンズ５でフィルム６上にスリッ
ト投影する。In such an image reading apparatus 1, an image on one side of the original 1a is illuminated by a light source (not shown) during simultaneous reading of the front and back sides,
The light is reflected by the first reflecting mirror 2 and is slit-projected on the film 6 by the first lens 5. On the other hand, the image on the other side
The light is reflected by the reflecting mirror 3 and slit-projected on the film 6 by the first lens 5.
次に片面読取時には第１レンズ５を第２レンズ９に交
換し、レンズ移動手段によって原稿1aの読取面の中心14
がフィルム６の中心に一致する様に第２レンズ９の光軸
11をフィルム６の中心７まで平行移動させる。Next, at the time of single-sided reading, the first lens 5 is replaced with the second lens 9, and the center 14 of the reading surface of the original 1a is moved by the lens moving means.
Is the optical axis of the second lens 9 so that
11 is translated to the center 7 of the film 6.
第２レンズ９は、第１レンズ５と別体レンズである
か、又は第１レンズ５にアタッチメントレンズ付加した
ものでもよく、一体型の場合は、２焦点レンズとする。
投影倍率は表裏同時読取時より片面読取時の方が大きく
なるようにする。なお、第１・第２実施例で６は感光部
材としてマイクロフィルムを使用したが、CCDイメージ
センサを使用することもできる。The second lens 9 may be a separate lens from the first lens 5 or an attachment lens added to the first lens 5. In the case of an integral type, it is a bifocal lens.
The projection magnification is set to be higher in single-sided reading than in front-and-back simultaneous reading. In the first and second embodiments, the microfilm 6 is used as the photosensitive member, but a CCD image sensor can also be used.
（発明の効果） 本発明によれば、片面読取時に原稿面の光軸を感光部
材上の中心に移動する光軸移動手段を設けたので簡単な
構造で片面画像を感光部材有効部中心に大きく投影し
得、画像形成装置の機能を向上させ得る。(Effects of the Invention) According to the present invention, the optical axis moving means for moving the optical axis of the document surface to the center on the photosensitive member at the time of single-side reading is provided, so that the single-sided image can be enlarged around the effective portion of the photosensitive member with a simple structure. Projection can be performed, and the function of the image forming apparatus can be improved.
第１図は本発明による画像読取装置の第１実施例の概略
構成図、第２図は原稿の表裏画像を示す説明図、第３図
は表裏同時読取時のフィルム上へ形成される投影画像を
示す説明図、第４図は本発明による画像読取装置によっ
て形成されたフィルム上の投影画像を示す説明図、第５
図は本発明による画像読取装置の第２実施例の概略構成
図、第６図は従来技術による画像読取装置の概略構成図
である。 符号の説明 １……画像読取装置、1a……原稿 ２……第１反射鏡、３……第２反射鏡 ４……第３反射鏡、５……第１レンズ ６……フィルム、７……光軸 ９……第２レンズFIG. 1 is a schematic configuration diagram of a first embodiment of an image reading apparatus according to the present invention, FIG. 2 is an explanatory diagram showing front and back images of a document, and FIG. 3 is a projection image formed on a film at the time of simultaneous front and back reading. FIG. 4 is an explanatory view showing a projected image on a film formed by the image reading apparatus according to the present invention, and FIG.
FIG. 2 is a schematic configuration diagram of a second embodiment of the image reading device according to the present invention, and FIG. 6 is a schematic configuration diagram of an image reading device according to the prior art. DESCRIPTION OF SYMBOLS 1 ... image reading device, 1a ... original 2 ... first reflecting mirror 3, 2nd reflecting mirror 4 ... third reflecting mirror 5, 5 ... first lens 6 ... film, 7 ... … Optical axis 9 …… second lens
Claims (4)
部材に投影するための結像光学系と、前記結像光学系と
原稿の間に配置され、照明された原稿の表面画像と裏面
画像とを上下の向きを揃えて感光部材の幅方向の中央を
挟んで並べて投影するように前記結像光学系に導く複数
の反射鏡とを備え、原稿の片面画像のみを感光部材に投
影する時に片面画像が感光部材の中央に投影するように
結像光学系の光軸を移動させる光軸移動手段を設けたこ
とを特徴とする画像読取装置。An image forming optical system for projecting a front image and a back image of a moving document onto a photosensitive member, and a front image and a back surface of the illuminated document disposed between the image forming optical system and the document. A plurality of reflecting mirrors for guiding the image to the image forming optical system so that the image and the image are aligned vertically and sandwiching the center in the width direction of the photosensitive member, and projecting only a one-sided image of the document onto the photosensitive member. An image reading apparatus comprising an optical axis moving means for moving an optical axis of an imaging optical system so that a one-sided image is sometimes projected on the center of a photosensitive member.
により光軸を移動させることを特徴とする特許請求の範
囲第１項に記載の画像読取装置。2. The image reading apparatus according to claim 1, wherein said optical axis moving means moves an optical axis by moving a reflecting mirror.
ことにより光軸を移動させることを特徴とする特許請求
の範囲第１項に記載の画像読取装置。3. The image reading apparatus according to claim 1, wherein said optical axis moving means moves the optical axis by changing an image forming optical system.
片面読取時に異なる投影倍率で画像を感光部材に投影す
ることを特徴とする特許請求の範囲第１項から第３項の
いずれか１項に記載の画像読取装置。4. The image forming optical system according to claim 1, wherein said image forming optical system projects an image on a photosensitive member at a different projection magnification when reading the front and back sides of a document and when reading a single side. 2. The image reading device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63048643A JP2578349B2 (en) | 1988-03-03 | 1988-03-03 | Image reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63048643A JP2578349B2 (en) | 1988-03-03 | 1988-03-03 | Image reading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01223435A JPH01223435A (en) | 1989-09-06 |
| JP2578349B2 true JP2578349B2 (en) | 1997-02-05 |
Family
ID=12809045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63048643A Expired - Fee Related JP2578349B2 (en) | 1988-03-03 | 1988-03-03 | Image reading device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2578349B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59154433A (en) * | 1983-02-21 | 1984-09-03 | Canon Inc | Exposing device |
| JPS60214349A (en) * | 1984-04-10 | 1985-10-26 | Sharp Corp | Original scanning device |
-
1988
- 1988-03-03 JP JP63048643A patent/JP2578349B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01223435A (en) | 1989-09-06 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |