JP2013064857A5 - - Google Patents

Description

上記目的を達成するために、本発明は、光束を偏向する第１及び第２の偏向面を有する偏向手段と、前記第１及び第２の偏向面の夫々に光束を導光する第１及び第２の入射光学系と、前記第１及び第２の偏向面により偏向された光束の夫々を第１及び第２の被走査面に集光する第１及び第２の結像光学系と、を備える光走査装置であって、前記第１及び第２の入射光学系の夫々は、主走査断面に対して互いに異なる側から前記第１及び第２の偏向面に光束を入射させており、前記１の偏向面により偏向された光束を検知して得られた第１の検知信号に基づいて、前記第１の被走査面に入射する光束の書き出しタイミングを制御する第１の検知手段を備え、前記第１の検知手段は、前記第１の検知信号に基づいて前記第２の被走査面に入射する光束の書き出しタイミングを制御することを特徴とする。 To achieve the above object, the present invention is, first and guiding and deflecting means having a first and a second deflecting surface for deflecting a light beam, a light beam to each of said first and second deflection surface a second incident optical system, said first and second first and second imaging optical system that focuses the respective deflected light beam to the first and second surfaces to be scanned by the deflecting surface, an optical scanning apparatus comprising said each of the first and second incident optical system s is allowed to be incident light beam from different sides to the first and second deflecting surface in the main scanning cross section, First detection means is provided for controlling writing start timing of the light beam incident on the first scanned surface based on a first detection signal obtained by detecting the light beam deflected by the first deflection surface. said first sensing means is incident on the second surface to be scanned based on the first detection signal And controlling the write timing of the bundle.

本実施形態は、走査系ユニットＵ１に配置されている同期検知光学系ＬＣ１の同期検知センサから出力されるタイミングに基づき、走査系ユニットＵ１、後述する襷がけの位置関係となるＵ４の光源手段の発光タイミングを制御している。一方、走査系ユニットＵ３に配置されている同期検知光学系ＬＣ３の同期検知センサから出力されるタイミングに基づき、走査系ユニットＵ３、後述する襷がけの位置関係となるＵ２の光源手段の発光タイミングを制御している。すなわち、光学的に上下対称に配置された２つの走査系ユニットを、ポリゴンを挟んで２組対向配置している本実施形態では、その４つの内の上下対称配置された２つの走査系ユニットの走査系内に同期検知光学系をそれぞれ有し、２つの同期検知光学系によって得られるタイミングを襷がけの位置関係となる走査系ユニットの発光タイミング制御に用いている。 In the present embodiment, based on the timing output from the synchronization detection sensor of the synchronization detection optical system LC1 arranged in the scanning system unit U1, the scanning system unit U1 and the light source means of U4 that has a positional relationship of ghosting described later are used. The light emission timing is controlled. On the other hand, based on the timing output from the synchronization detection sensor of the synchronization detection optical system LC3 arranged in the scanning system unit U3, the light emission timing of the scanning system unit U3 and the light source means of U2 which has a positional relationship of ghosting described later is set. I have control. That is, in this embodiment , two scanning system units that are optically symmetrically arranged vertically are arranged so as to face each other across a polygon. In this embodiment, two of the four scanning system units that are vertically symmetrically arranged Each of these scanning systems has a synchronization detection optical system, and the timing obtained by the two synchronization detection optical systems is used for the light emission timing control of the scanning system unit having the positional relationship of the separation.

Claims (9)

光束を偏向する第１及び第２の偏向面を有する偏向手段と、前記第１及び第２の偏向面の夫々に光束を導光する第１及び第２の入射光学系と、前記第１及び第２の偏向面により偏向された光束の夫々を第１及び第２の被走査面に集光する第１及び第２の結像光学系と、を備える光走査装置であって、
前記第１及び第２の入射光学系の夫々は、主走査断面に対して互いに異なる側から前記第１及び第２の偏向面に光束を入射させており、
前記１の偏向面により偏向された光束を検知して得られた第１の検知信号に基づいて、前記第１の被走査面に入射する光束の書き出しタイミングを制御する第１の検知手段を備え、
前記第１の検知手段は、前記第１の検知信号に基づいて前記第２の被走査面に入射する光束の書き出しタイミングを制御することを特徴とする光走査装置。 And deflecting means having a first and a second deflecting surface for deflecting the light beam, a first and second incident optical system for guiding the light beam to each of said first and second deflecting surfaces, the first and an optical scanning apparatus comprising: a first and second imaging optical system for converging the respective light beam deflected by the second deflecting surface in the first and second surfaces to be scanned, and
Wherein each of the first and second incident optical system, and is incident light beam from different sides to the first and second deflecting surface in the main scanning cross section,
First detection means is provided for controlling writing start timing of the light beam incident on the first scanned surface based on a first detection signal obtained by detecting the light beam deflected by the first deflection surface. ,
Said first sensing means includes an optical scanning device and controls the writing timing of the light beam incident on said second surface to be scanned based on the first detection signal. 前記第１及び第２の偏向面の夫々に光束を導光する第３及び第４の入射光学系と、前記第１及び第２の偏向面により偏向された光束の夫々を第３及び第４の被走査面に集光する第３及び第４の結像光学系と、を更に備え、Third and fourth incident optical systems for guiding light beams to the first and second deflection surfaces, respectively, and third and fourth light beams deflected by the first and second deflection surfaces, respectively. And third and fourth imaging optical systems for condensing on the scanned surface of
前記第１及び３の入射光学系は、主走査断面に対して互いに異なる側から前記第１の偏向面に光束を入射させ、前記第２及び４の入射光学系は、主走査断面に対して互いに異なる側から前記第２の偏向面に光束を入射させていることを特徴とする請求項１に記載の光走査装置。  The first and third incident optical systems cause a light beam to be incident on the first deflecting surface from different sides with respect to the main scanning section, and the second and fourth incident optical systems are configured with respect to the main scanning section. The optical scanning device according to claim 1, wherein a light beam is incident on the second deflecting surface from different sides. 前記１の偏向面により偏向された光束を検知して得られた第２の検知信号に基づいて、前記第３の被走査面に入射する光束の書き出しタイミングを制御する第２の検知手段を更に備え、該記第２の検知手段は、前記第２の検知信号に基づいて前記第４の被走査面に入射する光束の書き出しタイミングを制御することを特徴とする請求項２に記載の光走査装置。A second detector for controlling a writing timing of the light beam incident on the third surface to be scanned based on a second detection signal obtained by detecting the light beam deflected by the first deflection surface; 3. The optical scanning according to claim 2, wherein the second detection unit controls writing timing of a light beam incident on the fourth scanned surface based on the second detection signal. apparatus. 前記２の偏向面により偏向された光束を検知して得られた第２の検知信号に基づいて、前記第４の被走査面に入射する光束の書き出しタイミングを制御する第２の検知手段を更に備え、該記第２の検知手段は、前記第２の検知信号に基づいて前記第３の被走査面に入射する光束の書き出しタイミングを制御することを特徴とする請求項２に記載の光走査装置。A second detector for controlling a writing timing of the light beam incident on the fourth scanned surface based on a second detection signal obtained by detecting the light beam deflected by the second deflection surface; 3. The optical scanning according to claim 2, wherein the second detection unit controls a writing timing of a light beam incident on the third surface to be scanned based on the second detection signal. apparatus. 前記第１及び第２の検知手段の夫々は、前記１の偏向面により偏向された光束を検知する第１及び第２の検知センサと、前記第１の偏向面により偏向された光束を前記第１及び第２の検知センサに導光する共通の検知レンズと、を有することを特徴とする請求項３に記載の光走査装置。 Wherein each of the first and second sensing means, said first and second detection sensor for detecting the light beam deflected by said first deflecting surface, the light beam deflected by said first deflecting surface and the the optical scanning device according to claim 3, a common detection lens for guiding the first and second detection sensor, characterized that you chromatic. 前記第１及び第２の偏向面に入射する光束の夫々と主走査断面との成す角度は、全て同一であることを特徴とする請求項１乃至５のいずれか１項に記載の光走査装置。 The angle between the respective main scanning cross section of the first and the light beam incident on the second deflecting surface, the optical scanning apparatus according to any one of claims 1 to 5, characterized in that all the same . 前記第１の検知手段は、予め測定された前記偏向手段の面分割誤差を用いて前記第２の被走査面に入射する光束の書き出し位置のずれを補正することを特徴とする請求項１乃至６のいずれか１項に記載の光走査装置。 The first detection unit corrects a deviation of a writing position of a light beam incident on the second scanned surface by using a surface division error of the deflection unit measured in advance. the optical scanning apparatus according to any one of 6. 請求項１乃至７のいずれか１項に記載の光走査装置と、該光走査装置により前記被走査面に形成された静電潜像をトナー像として現像する現像器と、現像された前記トナー像を被転写材に転写する転写器と、転写された前記トナー像を前記被転写材に定着させる定着器と、を備えることを特徴とする画像形成装置。 An optical scanning device according to any one of claims 1 to 7, a developing device for developing an electrostatic latent image formed on the surface to be scanned by the optical scanning apparatus as a toner image, the toner developed an image forming apparatus comprising: a transferring device for transferring an image to a transfer material, a fixing device for fixing the toner image transferred to the transfer material, the. 請求項１乃至７のいずれか１項に記載の光走査装置と、外部機器から出力されたコードデータを画像信号に変換して前記光走査装置に入力するプリンタコントローラと、を備えることを特徴とする画像形成装置。 An optical scanning device according to any one of claims 1 to 7, and characterized in that by converting the code data outputted from an external device into an image signal and a printer controller to be input to the optical scanning device Image forming apparatus.