JPS6349540U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は光学系の概略図、第２図は原稿台の部
分平面図、第３図はその断面図、第４図は光学系
の駆動状態図、第５図は検出マークの平面図、第
６図はイメージセンサの出力信号グラフ、第７図
は制御ブロツク図、第８図は制御フローチヤート
である。 図中符号：１……原稿台、２……原稿ガイド、
３……光源、４……リフレクター、５，６，７，
９……ミラー、８……結像レンズ、１０……感光
体ドラム、１１……イメージセンサ、１２……検
出マーク、１３……処理部、１４……制御部、１
５……光学系駆動モータ、１６……感光体駆動モ
ータ。 Fig. 1 is a schematic diagram of the optical system, Fig. 2 is a partial plan view of the document table, Fig. 3 is a sectional view thereof, Fig. 4 is a diagram of the driving state of the optical system, Fig. 5 is a plan view of the detection mark, FIG. 6 is an output signal graph of the image sensor, FIG. 7 is a control block diagram, and FIG. 8 is a control flowchart. Codes in the figure: 1...Original table, 2...Original guide,
3...Light source, 4...Reflector, 5, 6, 7,
9... Mirror, 8... Imaging lens, 10... Photosensitive drum, 11... Image sensor, 12... Detection mark, 13... Processing section, 14... Control section, 1
5...Optical system drive motor, 16...Photoconductor drive motor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 少なくとも原稿保持手段と、感光体と、該感光
体に結像するレンズとからなる走査光学系におい
て、前記原稿保持手段の近傍に備えた検出マーク
を前記感光体近傍に備えたラインイメージセンサ
上に結像レンズによつて結像して得た信号を処理
する手段と、該処理手段の出力に応じて光学系の
移動速度及び感光体の回転速度を同調させる駆動
制御手段とを備えたことを特徴とする走査光学系
の焦点、倍率制御装置。 In a scanning optical system comprising at least an original holding means, a photoreceptor, and a lens that forms an image on the photoreceptor, a detection mark provided near the original holding means is placed on a line image sensor provided near the photoreceptor. The present invention includes a means for processing a signal obtained by forming an image with an imaging lens, and a drive control means for synchronizing the moving speed of the optical system and the rotational speed of the photoreceptor in accordance with the output of the processing means. Features: Focus and magnification control device for scanning optical system.