JP2887820B2 - Light intensity adjustment device for variable magnification slit scanner - Google Patents
Light intensity adjustment device for variable magnification slit scannerInfo
- Publication number
- JP2887820B2 JP2887820B2 JP772691A JP772691A JP2887820B2 JP 2887820 B2 JP2887820 B2 JP 2887820B2 JP 772691 A JP772691 A JP 772691A JP 772691 A JP772691 A JP 772691A JP 2887820 B2 JP2887820 B2 JP 2887820B2
- Authority
- JP
- Japan
- Prior art keywords
- slit
- light amount
- light
- magnification
- variable
- 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.)
- Expired - Fee Related
Links
Landscapes
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Control Of Exposure In Printing And Copying (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真複写機等に用
いられるスリット走査装置に関し、特に、形成される画
像が変倍可能なスリット走査装置において、倍率を最大
に設定した時にスリット方向の一端において光量が不足
するのを補正する光量調節装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slit scanning device used in an electrophotographic copying machine or the like, and more particularly, to a slit scanning device capable of changing the size of an image to be formed, when the magnification is set to a maximum value. The present invention relates to a light amount adjusting device that corrects an insufficient light amount at one end.
【０００２】[0002]
【従来の技術】原稿が固定され感光体が移動する複写機
であって、原稿をスリット状に照明してその照明領域を
スリットに直交する方向に走査しながらこれと同期して
移動する感光体に照明領域の像を投影して行く原稿固定
方式のスリット走査装置において、投影レンズのコサイ
ン四乗則に基づく感光体面上での光量不均一、照明ラン
プの発光不均一に基づく感光体面上での光量不均一等を
補正するために、原稿の照明領域を規制するスリットを
これら光量不均一を補正するような形状にすることはよ
く知られている。また、各複写機毎に異なる光量分布を
調整できるように、スリットを形成する光量調節板をス
リットに直交する方向に位置調節可能な複数の板状部材
にて構成することも知られている。2. Description of the Related Art A copying machine in which a document is fixed and a photosensitive member moves, wherein the document is illuminated in a slit shape and the illuminated area moves in a direction perpendicular to the slit while moving in synchronism therewith. In a fixed document type slit scanning device that projects an image of an illumination area on a photoreceptor surface based on the cosine fourth law of the projection lens, the amount of light on the photoreceptor surface is non-uniform, It is well known that a slit for regulating an illumination area of a document is formed in such a shape as to correct the non-uniform light amount in order to correct the non-uniform light amount. It is also known that a light amount adjusting plate forming a slit is constituted by a plurality of plate-like members whose positions can be adjusted in a direction orthogonal to the slit so that a different light amount distribution can be adjusted for each copying machine.
【０００３】図１に原稿固定方式のスリット走査装置の
概略の構成を示す。プラテン１上に載置された原稿２
は、プラテン１の下側で図に直交する方向（ｘ方向）に
延び、図のｙ方向に速度ｖで移動する線状光源３により
順次照明される。原稿２の照明領域からの光は、光源３
と一体にｙ方向に速度ｖで移動する全速ミラー４により
プラテン１と平行な−ｙ方向に反射され、ｙ方向に速度
ｖ／２で移動する半速ルーフミラー５によりｙ方向に反
射され、投影レンズ６を経て方向転換ミラー７により偏
向されて、回転する感光体８の一定の露光領域９に投影
され、原稿２のスリット走査投影像が感光体８表面に形
成される。FIG. 1 shows a schematic configuration of a slit scanning device of a fixed document type. Original 2 placed on platen 1
Are extended below the platen 1 in a direction (x direction) perpendicular to the figure and are sequentially illuminated by a linear light source 3 moving at a speed v in the y direction in the figure. Light from the illumination area of the original 2
The light is reflected in the −y direction parallel to the platen 1 by the full-speed mirror 4 moving at a speed v in the y direction, and is reflected in the y direction by a half-speed roof mirror 5 moving at a speed v / 2 in the y direction. The light is deflected by the direction changing mirror 7 via the lens 6 and is projected onto a fixed exposure area 9 of the rotating photoconductor 8, so that a slit scan projection image of the document 2 is formed on the surface of the photoconductor 8.
【０００４】線状光源３から発光された光は、光源３と
一体に形成されたメインリフレクター１０及びそれに対
向して配置されている対向リフレクター１１により反射
集光されて、メインリフレクター１０と対向リフレクタ
ー１１の間に形成されたスリット照明領域１２に集光さ
れる。この照明領域１２の限界を定めるために、メイン
リフレクター１０側上部には第１光量規制板１３が、対
向リフレクター１１側上部には第２光量規制板１４がそ
れぞれ取り付けられている。なお、線状光源３、全速ミ
ラー４、メインリフレクター１０、対向リフレクター１
１、第１光量規制板１３及び第２光量規制板１４は一体
になって走査ヘッド１５を構成している。The light emitted from the linear light source 3 is reflected and condensed by a main reflector 10 formed integrally with the light source 3 and an opposing reflector 11 arranged opposite to the main reflector 10, and the main reflector 10 and the opposing reflector The light is condensed on a slit illumination area 12 formed between the first and second slits 11. In order to determine the limit of the illumination area 12, a first light quantity regulating plate 13 is attached to the upper part on the main reflector 10 side, and a second light quantity regulating plate 14 is attached to the upper part on the opposing reflector 11 side. The linear light source 3, the full-speed mirror 4, the main reflector 10, the opposing reflector 1
1, the first light quantity regulating plate 13 and the second light quantity regulating plate 14 constitute a scanning head 15 integrally.
【０００５】第１光量規制板１３と第２光量規制板１４
は、図５の平面図を示すように、相互に対向して照明ス
リット領域１２を規定しており、何れか一方の光量規制
板（図の場合は第２光量規制板１４）を、スリットに直
交する方向（ｙ方向）に位置調節可能な複数（図の場合
は４枚）の板状部材Ｐ１〜Ｐ４にて構成し、各複写機毎
に異なる光量分布をこれら板状部材Ｐ１〜Ｐ４をｙ方向
に位置調節することにより補正している。A first light quantity regulating plate 13 and a second light quantity regulating plate 14
Defines the illumination slit regions 12 facing each other as shown in the plan view of FIG. 5, and any one of the light amount regulating plates (the second light amount regulating plate 14 in the case of FIG. It is composed of a plurality of (four in the figure) plate-like members P1 to P4 whose positions can be adjusted in a direction perpendicular to the direction (y-direction). The correction is made by adjusting the position in the y direction.
【０００６】[0006]
【発明が解決しようとする課題】ところで、このような
原稿固定方式のスリット走査装置において、投影倍率を
上げて走査露光をするには、図１に一点鎖線で示したよ
うに、投影レンズ６を−ｙ方向に所定量移動させると共
に、原稿２のスリット方向一端２１を基準位置として拡
大する場合、投影レンズ６をｘ方向にも所定量移動させ
（図２参照）、また、共役距離を結像関係にするため、
半速ルーフミラー５の初期位置をｙ方向に一点鎖線の位
置まで移動させる。In order to increase the projection magnification and perform scanning exposure in such a document fixing type slit scanning device, as shown by a dashed line in FIG. In the case where the projection lens 6 is moved by a predetermined amount in the −y direction and is enlarged with one end 21 in the slit direction of the document 2 as a reference position, the projection lens 6 is also moved by a predetermined amount in the x direction (see FIG. 2), and the conjugate distance is imaged. To make a relationship
The initial position of the half-speed roof mirror 5 is moved in the y direction to the position indicated by the dashed line.
【０００７】このようにして変倍してスリット走査する
場合、図６（ａ）に示すように、等倍で感光体８露光領
域９においてスリット方向（ｘ方向）に均一に光量分布
するように、光量規制板１３又は１４の板状部材Ｐ１〜
Ｐ４を調整しても、倍率を最大倍率に変更すると（図６
の場合は２倍）、図６（ｂ）に実線で示すように、原稿
２の基準端２１と反対の端部２２近傍が対応する部分に
おいて光量が低下してしまい、複写ムラが目立つように
なる。このような光量低下の原因としては、投影レンズ
のコサイン四乗則に加えて、投影レンズ６に組み込まれ
ているシェーデング補正板の作用によると考えられる。When the slit scanning is performed with the magnification changed in this way, as shown in FIG. 6A, the light amount distribution is made uniform in the slit direction (x direction) in the exposure area 9 of the photosensitive member 8 at the same magnification. , The plate-like members P1 to P1 of the light amount regulating plate 13 or 14
Even if P4 is adjusted, if the magnification is changed to the maximum magnification (FIG. 6)
As shown by the solid line in FIG. 6B, the amount of light is reduced in a portion corresponding to the vicinity of the end 22 opposite to the reference end 21 of the original 2 so that the copy unevenness is conspicuous. Become. It is considered that such a decrease in the amount of light is caused by the action of the shading correction plate incorporated in the projection lens 6 in addition to the cosine fourth law of the projection lens.
【０００８】本発明はこのような問題点に鑑みてなされ
たものであり、その目的は、変倍可能なスリット走査装
置において、最大倍率にしたときにスリット方向一端に
おいて現れる光量低下を補正するように構成した光量調
節装置を提供することである。SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and an object of the present invention is to provide a variable-magnification slit scanning device that corrects a decrease in the amount of light that appears at one end in the slit direction when the magnification is maximized. The present invention provides a light amount adjusting device configured as described above.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成する本発
明の変倍可能なスリット走査装置における光量調節装置
は、原稿をスリット状に照明してその照明領域をスリッ
トに直交する方向に走査しながらこれと同期して移動す
る感光体上又は線状の光電変換素子上に投影する変倍可
能なスリット走査装置であって、原稿のスリット方向一
端を基準端として拡大する変倍可能なスリット走査装置
において、最大倍率時の原稿の基準端と反対の端部近傍
のスリット幅をスリットを形成する一対の光量規制板の
少なくとも一方の端面を切り欠くことにより広げて、最
大倍率時の端部近傍の光量低下を補償するようにしたこ
とを特徴とするものである。In order to achieve the above object, a light amount adjusting device in a variable magnification slit scanning device according to the present invention illuminates a document in a slit shape and scans an illumination area in a direction perpendicular to the slit. A variable magnification slit scanning device that projects on a photoconductor or a linear photoelectric conversion element that moves synchronously with the variable magnification slit scanning device. In the apparatus, the slit width near the end opposite to the reference end of the original at the maximum magnification is widened by notching at least one end surface of the pair of light quantity regulating plates forming the slit, and the vicinity of the end at the maximum magnification This is characterized by compensating for a decrease in the amount of light.
【００１０】この場合、切り欠きを設ける光量規制板
を、端部において相互に重畳してスリットに直交する方
向に位置調節可能な複数の板状部材にて構成してもよい
が、スリット側の端面からスリットと直交する方向に複
数の溝を切り込んで分割し、溝の底辺部により隣接する
分割部分を連結し、該底辺部を分割部分の調整ストロー
ク以上の長さにした１枚の細長い板状部材にて構成する
のが部品点数、取り付け、調整等の面から望ましい。In this case, the light amount regulating plate provided with the notch may be constituted by a plurality of plate-like members which can overlap each other at the ends and can be adjusted in the direction perpendicular to the slit. A single elongated plate having a plurality of grooves cut from the end face in a direction orthogonal to the slits and divided, adjacent divided portions are connected by the bottom portions of the grooves, and the bottom portions are longer than the adjustment stroke of the divided portions. It is desirable to configure it with a shape member in terms of the number of parts, mounting, adjustment, and the like.
【００１１】また、切り欠きを設ける光量規制板を、ス
リットを挟んで光源と反対側に位置する光量規制板とす
るのが、熱膨張等により調節が狂うのを避ける意味から
望ましい。It is desirable that the light quantity regulating plate provided with the cutout be a light quantity regulating plate located on the opposite side of the light source with the slit interposed therebetween, in order to avoid a misalignment due to thermal expansion or the like.
【００１２】[0012]
【作用】本発明においては、最大倍率時の原稿の基準端
と反対の端部近傍のスリット幅をスリットを形成する一
対の光量規制板の少なくとも一方の端面を切り欠くこと
により広げて、最大倍率時の端部近傍の光量低下を補償
するようにしているので、特に最大倍率時に目立つ原稿
の基準端と反対の端部近傍が対応する部分の光量低下を
避けることができる。According to the present invention, the slit width near the end opposite to the reference end of the original at the maximum magnification is increased by cutting out at least one end face of a pair of light quantity regulating plates forming the slit, thereby increasing the maximum magnification. Since the decrease in light amount near the edge at the time is compensated, it is possible to avoid a decrease in light amount at a portion corresponding to the vicinity of the end opposite to the reference end of the document, which is particularly noticeable at the maximum magnification.
【００１３】[0013]
【実施例】次に、実施例に基づいて本発明の変倍可能な
スリット走査装置における光量調節装置について説明す
る。本発明の光量調節装置は図１及び図２に示したよう
な構成のスリット走査装置に適用するものであるが、そ
の構成は上記した通りである。本発明の１実施例におい
ては、図３に示すように、走査ヘッド１５の第２光量規
制板１４を構成する複数の板状部材Ｐ１〜Ｐ４の照明ス
リット領域１２を規定する端面を、最大倍率時の原稿２
の基準端２１と反対の端部２２近傍において、所定形状
の切り欠き面１６にて構成することにより、この部分の
スリット幅を広げる。このようにすると、倍率を最大倍
率（２倍）にした場合、投影面（感光体面）８におい
て、図６（ｂ）に実線で示された光量分布が点線のよう
に増加し、原稿２の基準端２１と反対の端部２２近傍が
対応する位置においても光量低下がなく、複写ムラが目
立つようなことがなくなる。なお、各板状部材Ｐ１〜Ｐ
４にはスリットに直交する方向の長孔２０が設けてあ
り、隣接する板状部材の端部間を重ね合わせ、長孔２０
にビス２３を通して対向リフレクター１１に固定するこ
とにより位置調節可能に取り付けられる。Next, a description will be given of a light amount adjusting device in a variable magnification slit scanning device according to the present invention based on an embodiment. The light amount adjusting device according to the present invention is applied to the slit scanning device having the configuration shown in FIGS. 1 and 2, and the configuration is as described above. In one embodiment of the present invention, as shown in FIG. 3, the end faces of the plurality of plate-like members P1 to P4 constituting the second light quantity regulating plate 14 of the scanning head 15 that define the illumination slit areas 12 are subjected to the maximum magnification. Manuscript of time 2
In the vicinity of the end 22 opposite to the reference end 21, the cutout surface 16 having a predetermined shape is formed, so that the slit width of this portion is increased. In this manner, when the magnification is set to the maximum magnification (2 times), the light amount distribution indicated by the solid line in FIG. Even at a position corresponding to the vicinity of the end 22 opposite to the reference end 21, there is no decrease in the amount of light, and copy unevenness does not become noticeable. Each of the plate members P1 to P
4 is provided with a long hole 20 in a direction orthogonal to the slit, and the end portions of adjacent plate members are overlapped with each other to form a long hole 20.
Is fixed to the opposing reflector 11 through a screw 23 so as to be adjustable in position.
【００１４】ところで、第２光量規制板１４としては、
図３に示したように相互に端部を重ね合わせてスリット
と直交する方向へ独立に位置調節自在に配置した複数の
板状部材Ｐ１〜Ｐ４により構成する代わりに、図４に示
すように、１枚の細長い板状部材Ｐにて構成し、この板
状部材Ｐにスリット側の端面からスリットと直交する方
向にｎ−１個の溝１７を切り込んでｎ個の部分に分割
し、溝１７の底辺部１９により隣接する分割部分を連結
し、溝１７の底辺部１９を分割部分の調整ストローク以
上の長さにするようにしてもよい。このように構成する
と、部品点数が減り、取り付け・調節が簡単になるの
で、コスト上メリトが生じる。By the way, as the second light quantity regulating plate 14,
As shown in FIG. 4, instead of being composed of a plurality of plate-like members P <b> 1 to P <b> 4 in which ends are mutually overlapped as shown in FIG. A single elongated plate-shaped member P is formed, and n-1 grooves 17 are cut into the plate-shaped member P from the slit-side end surface in a direction orthogonal to the slits, and divided into n portions. The adjacent divided portions may be connected to each other by the bottom portion 19, and the length of the bottom portion 19 of the groove 17 may be longer than the adjustment stroke of the divided portion. With this configuration, the number of components is reduced, and mounting and adjustment are simplified, resulting in cost merit.
【００１５】以上の実施例においては、走査ヘッド１５
の第２光量規制板１４を最大倍率時の端部近傍の光量低
下を補償する切り欠き面１６を設けた複数の板状部材Ｐ
１〜Ｐ４又は溝１７を切り込んで分割した１枚の細長い
板状部材Ｐにて構成したが、この代わりにスリット照明
領域１２を挟んで反対の第１光量規制板１３を同様に構
成してもよい。しかし、第１光量規制板１３は第２光量
規制板１４に比較して光源３によりより加熱されるた
め、熱膨張等により調節が狂うおそれがより高い。した
がって、第２光量規制板１４を上記のように構成するの
が望ましい。In the above embodiment, the scanning head 15
A plurality of plate-like members P provided with cutout surfaces 16 for compensating for a decrease in the amount of light near the end portion at the maximum magnification of the second light amount regulating plate 14.
1 to P4 or a single elongated plate-shaped member P cut by cutting the groove 17, but instead of the slit illumination region 12, the opposite first light amount regulating plate 13 may be similarly configured. Good. However, since the first light quantity regulating plate 13 is heated by the light source 3 as compared with the second light quantity regulating plate 14, there is a higher possibility that the adjustment may be out of order due to thermal expansion or the like. Therefore, it is desirable to configure the second light quantity regulating plate 14 as described above.
【００１６】以上、実施例に基づいて本発明を説明して
きたが、本発明はこれら実施例に限定されず種々の変形
が可能である。また、本発明の光量調節装置は、図１に
示したような原稿のスリット領域の投影像を感光体上に
走査投影するものの他、原稿のスリット領域の像をライ
ンセンサー等に投影して原稿を読み取る変倍可能なスリ
ット走査装置にも適用できる。Although the present invention has been described based on the embodiments, the present invention is not limited to these embodiments, and various modifications are possible. The light amount adjusting apparatus of the present invention scans and projects a projection image of a slit area of a document on a photoconductor as shown in FIG. The present invention can also be applied to a variable-magnification slit scanning device that reads the image.
【００１７】[0017]
【発明の効果】以上説明したように、本発明の変倍可能
なスリット走査装置における光量調節装置によると、最
大倍率時の原稿の基準端と反対の端部近傍のスリット幅
をスリットを形成する一対の光量規制板の少なくとも一
方の端面を切り欠くことにより広げて、最大倍率時の端
部近傍の光量低下を補償するようにしているので、特に
最大倍率時に目立つ原稿の基準端と反対の端部近傍が対
応する部分の光量低下を避けることができる。As described above, according to the light amount adjusting device in the variable magnification slit scanning device of the present invention, the slit is formed with the slit width near the end opposite to the reference end of the original at the maximum magnification. At least one of the end surfaces of the pair of light amount regulating plates is cut out so as to be widened to compensate for a decrease in the amount of light near the end portion at the maximum magnification, so that the end opposite to the reference end of the document which is particularly conspicuous at the maximum magnification. It is possible to avoid a decrease in the amount of light in a portion corresponding to the vicinity of the portion.
【図１】本発明の光量調節装置を適用する原稿固定方式
のスリット走査装置の１例の概略の構成を示す図であ
る。FIG. 1 is a view showing a schematic configuration of an example of a slit scanning device of a document fixing system to which a light amount adjusting device of the present invention is applied.
【図２】図１の標準倍率、最大変倍時の原稿、投影レン
ズ、感光体の位置関係を示す図である。FIG. 2 is a diagram illustrating a positional relationship between a document, a projection lens, and a photoconductor at a standard magnification and a maximum magnification in FIG. 1;
【図３】本発明の１実施例の光量規制板の平面図であ
る。FIG. 3 is a plan view of a light amount regulating plate according to one embodiment of the present invention.
【図４】本発明の他の実施例の光量規制板の平面図であ
る。FIG. 4 is a plan view of a light amount regulating plate according to another embodiment of the present invention.
【図５】従来の光量規制板の１例を示す平面図である。FIG. 5 is a plan view showing an example of a conventional light amount regulating plate.
【図６】従来の光量規制板を用いた場合の標準倍率及び
最大変倍時の光量分布を示す図である。FIG. 6 is a diagram showing a standard light amount and a light amount distribution at the maximum magnification when a conventional light amount regulating plate is used.
１…プラテン ２…原稿 ３…線状光源 ４…全速ミラー ５…半速ルーフミラー ６…投影レンズ ７…方向転換ミラー ８…感光体 ９…露光領域 １０…メインリフレクター １１…対向リフレクター １２…スリット照明領域 １３…第１光量規制板 １４…第２光量規制板 １５…走査ヘッド １６…切り欠き面 １７…溝 １９…溝の底辺部 ２０…長孔 ２１…原稿のスリット方向基準端 ２２…原稿のスリット方向基準端と反対の端部 ２３…ビス Ｐ、Ｐ１〜Ｐ４…板状部材 DESCRIPTION OF SYMBOLS 1 ... Platen 2 ... Document 3 ... Linear light source 4 ... Full speed mirror 5 ... Half speed roof mirror 6 ... Projection lens 7 ... Direction change mirror 8 ... Photoconductor 9 ... Exposure area 10 ... Main reflector 11 ... Opposite reflector 12 ... Slit illumination Area 13: First light amount regulating plate 14: Second light amount regulating plate 15: Scanning head 16: Notched surface 17: Groove 19: Bottom portion of groove 20: Slot 21: Reference end of document in slit direction 22: Document slit End opposite to the direction reference end 23: Screw P, P1 to P4: Plate member
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中野良則 神奈川県海老名市本郷2274番地富士ゼロ ックス株式会社海老名事業所内 (72)発明者 小林健 神奈川県海老名市本郷2274番地富士ゼロ ックス株式会社海老名事業所内 (56)参考文献 実開 昭60−150546（ＪＰ，Ｕ) 実開 昭62−146130（ＪＰ，Ｕ) 実開 昭53−127946（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) G03B 27/54 G03B 27/34 G03B 27/50 G03B 27/72 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshinori Nakano 2274, Hongo, Fuji Xerox Co., Ltd., Ebina, Ebina-shi, Kanagawa Prefecture (72) Inventor Ken Takeshi Kobayashi 2274, Hongo, Ebina, Ebina, Kanagawa, Japan In-house (56) References JP-A 60-150546 (JP, U) JP-A 62-146130 (JP, U) JP-A 53-127946 (JP, U) (58) Fields surveyed (Int. 6, DB name) G03B 27/54 G03B 27/34 G03B 27/50 G03B 27/72
Claims (4)
域をスリットに直交する方向に走査しながらこれと同期
して移動する感光体上又は線状の光電変換素子上に投影
する変倍可能なスリット走査装置であって、原稿のスリ
ット方向一端を基準端として拡大する変倍可能なスリッ
ト走査装置において、最大倍率時の原稿の基準端と反対
の端部近傍のスリット幅をスリットを形成する一対の光
量規制板の少なくとも一方の端面を切り欠くことにより
広げて、最大倍率時の端部近傍の光量低下を補償するよ
うにしたことを特徴とする変倍可能なスリット走査装置
における光量調節装置。1. A variable-magnification method in which a document is illuminated in a slit shape and the illuminated area is scanned in a direction orthogonal to the slit and projected onto a photosensitive member or a linear photoelectric conversion element which moves in synchronization with the slit. A variable-width slit scanning device that enlarges with one end in the slit direction of the document as a reference end, wherein the slit is formed with a slit width near the end opposite to the reference end of the document at the maximum magnification. A light amount adjusting device in a variable magnification slit scanning device, characterized in that at least one end surface of a pair of light amount regulating plates is widened by being cut out to compensate for a decrease in light amount near an end portion at the maximum magnification. .
おいて相互に重畳してスリットに直交する方向に位置調
節可能な複数の板状部材にて構成したことを特徴とする
請求項１記載の変倍可能なスリット走査装置における光
量調節装置。2. The light amount regulating plate provided with a notch is constituted by a plurality of plate-shaped members which are overlapped at their ends and can be adjusted in a direction perpendicular to the slit. Light amount adjusting device in a slit scanning device capable of zooming.
ト側の端面からスリットと直交する方向に複数の溝を切
り込んで分割し、溝の底辺部により隣接する分割部分を
連結し、該底辺部を分割部分の調整ストローク以上の長
さにした１枚の細長い板状部材にて構成したことを特徴
とする請求項１記載の変倍可能なスリット走査装置にお
ける光量調節装置。3. A light quantity regulating plate provided with a notch is divided by cutting a plurality of grooves in a direction orthogonal to the slit from an end surface on the slit side, and adjacent divided parts are connected by a bottom of the groove. 2. A light amount adjusting device in a variable magnification slit scanning device according to claim 1, wherein the light emitting device is constituted by a single elongated plate-like member having a length equal to or longer than an adjustment stroke of the divided portion.
トを挟んで光源と反対側に位置する光量規制板としたこ
とを特徴とする請求項１から３の何れか１項記載の変倍
可能なスリット走査装置における光量調節装置。4. The variable power variable plate according to claim 1, wherein the light amount regulating plate provided with the notch is a light amount regulating plate located on the opposite side of the light source with the slit interposed therebetween. Light amount adjustment device in a simple slit scanning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP772691A JP2887820B2 (en) | 1991-01-25 | 1991-01-25 | Light intensity adjustment device for variable magnification slit scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP772691A JP2887820B2 (en) | 1991-01-25 | 1991-01-25 | Light intensity adjustment device for variable magnification slit scanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04240840A JPH04240840A (en) | 1992-08-28 |
| JP2887820B2 true JP2887820B2 (en) | 1999-05-10 |
Family
ID=11673718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP772691A Expired - Fee Related JP2887820B2 (en) | 1991-01-25 | 1991-01-25 | Light intensity adjustment device for variable magnification slit scanner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2887820B2 (en) |
-
1991
- 1991-01-25 JP JP772691A patent/JP2887820B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04240840A (en) | 1992-08-28 |
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