JP2005099336A5 - - Google Patents

Claims (8)

光源手段と、前記光源手段から出射された光束を偏向する偏向手段と、前記偏向手段にて偏向された光束を被走査面上に結像させる走査光学系と、前記偏向手段にて偏向された光束を前記走査光学系の光学面を通過させることなく同期検知手段に導く同期検知光学系と、を有する走査光学装置において、
前記光源手段から出射された光束は、副走査断面内において前記偏向手段の回転軸に垂直な面に対し斜めに前記偏向手段の偏向面に入射しており、
前記同期検知光学系の光軸と前記走査光学系の光軸は異なっており、
前記同期検知光学系は、主走査方向と副走査方向のパワーが異なる光学素子を有し、前記光学素子の光学面の子線を含む副走査断面が前記偏向手段の回転軸に対して平行であり、且つ、前記光学素子の光学面の光軸は、主走査断面内において前記同期検知手段に入射している光束の主光線と一致していることを特徴とする走査光学装置。 Light source means, deflection means for deflecting the light beam emitted from the light source means, a scanning optical system for imaging the light beam deflected by the deflection means on the surface to be scanned, and deflected by the deflection means In a scanning optical device having a synchronization detection optical system that guides a light beam to a synchronization detection means without passing through the optical surface of the scanning optical system,
The light beam emitted from the light source means is incident on the deflection surface of the deflection means obliquely with respect to the plane perpendicular to the rotation axis of the deflection means in the sub-scan section,
The optical axis of the synchronous detection optical system and the optical axis of the scanning optical system are different,
The synchronization detection optical system includes optical elements having different powers in the main scanning direction and the sub-scanning direction, and a sub-scanning section including a child line of the optical surface of the optical element is parallel to the rotation axis of the deflecting unit. And an optical axis of the optical surface of the optical element coincides with a principal ray of a light beam incident on the synchronization detecting means in a main scanning section . 光源手段と、前記光源手段から出射された光束を偏向する偏向手段と、前記偏向手段にて偏向された光束を被走査面上に結像させる走査光学系と、前記偏向手段にて偏向された光束を前記走査光学系の光学面を通過させることなく同期検知手段に導く同期検知光学系と、を有する走査光学装置において、
前記光源手段から出射された光束は、副走査断面内において前記偏向手段の回転軸に垂直な面に対し斜めに前記偏向手段の偏向面に入射しており、
前記同期検知光学系の光軸と前記走査光学系の光軸は異なっており、
前記同期検知光学系は、前記同期検知光学系の光軸に対して回転対称な光学面により構成され、前記同期検知光学系の光軸は、主走査断面内において前記同期検知手段に入射している光束の主光線と一致していることを特徴とする走査光学装置。 Light source means, deflection means for deflecting the light beam emitted from the light source means, a scanning optical system for imaging the light beam deflected by the deflection means on the surface to be scanned, and deflected by the deflection means In a scanning optical device having a synchronization detection optical system that guides a light beam to a synchronization detection means without passing through the optical surface of the scanning optical system,
The light beam emitted from the light source means is incident on the deflection surface of the deflection means obliquely with respect to the plane perpendicular to the rotation axis of the deflection means in the sub-scan section,
The optical axis of the synchronous detection optical system and the optical axis of the scanning optical system are different,
The synchronization detection optical system is configured by an optical surface that is rotationally symmetric with respect to the optical axis of the synchronization detection optical system, and the optical axis of the synchronization detection optical system is incident on the synchronization detection means within a main scanning section. A scanning optical device characterized by being coincident with a principal ray of a luminous flux . 光源手段と、前記光源手段から出射された光束を偏向する偏向手段と、前記偏向手段にて偏向された光束を被走査面上に結像させる走査光学系と、前記走査光学系を構成する第１の同期検知光学素子と、前記走査光学系と分離された第２の同期検知光学素子と、前記偏向手段にて偏向された光束を前記第１の同期検知光学素子と前記第２の同期検知光学素子を介して同期検知手段に導く同期検知光学系と、を有する走査光学装置において、
前記光源手段から出射された光束は、副走査断面内において前記偏向手段の回転軸に垂直な面に対し斜めに前記偏向手段の偏向面に入射しており、
前記第１の同期検知光学素子の光軸と前記第２の同期検知光学素子の光軸は異なっており、
主走査断面に投影した場合、前記同期検知手段に入射する光束が通過する前記第１の同期検知光学素子の光学面の法線と前記同期検知手段に入射する光束が通過する前記第２の同期検知光学素子の光学面の法線は、前記同期検知手段に入射する光束の主光線に対して互いに逆方向に傾いていることを特徴とする走査光学装置。 A light source means, a deflecting means for deflecting the light beam emitted from the light source means, a scanning optical system for forming an image of the light beam deflected by the deflecting means on a surface to be scanned, and a first optical system constituting the scanning optical system. 1 synchronization detection optical element, a second synchronization detection optical element separated from the scanning optical system, and the light beam deflected by the deflecting means, the first synchronization detection optical element and the second synchronization detection. In a scanning optical device having a synchronization detection optical system that leads to synchronization detection means via an optical element ,
The light beam emitted from the light source means is incident on the deflection surface of the deflection means obliquely with respect to the plane perpendicular to the rotation axis of the deflection means in the sub-scan section,
The optical axis of the first synchronization detection optical element is different from the optical axis of the second synchronization detection optical element,
When projected onto the main scanning section, the normal line of the optical surface of the first synchronization detection optical element through which the light beam incident on the synchronization detection unit passes and the second synchronization through which the beam incident on the synchronization detection unit passes. 2. A scanning optical apparatus according to claim 1, wherein normal lines of optical surfaces of the detection optical elements are inclined in directions opposite to each other with respect to a principal ray of a light beam incident on the synchronization detection means . 前記光源手段は、複数の光束を出射する請求項１乃至３の何れか一項記載の走査光学装置。 4. The scanning optical device according to claim 1 , wherein the light source means emits a plurality of light beams . 請求項１乃至４の何れか一項に記載の走査光学装置と、前記被走査面に配置された感光体と、前記走査光学系で走査された光束によって前記感光体上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、現像されたトナー像を被転写材に転写する転写器と、転写されたトナー像を被転写材に定着させる定着器とを有することを特徴とする画像形成装置。   5. The scanning optical device according to claim 1, the photosensitive member disposed on the surface to be scanned, and electrostatic formed on the photosensitive member by a light beam scanned by the scanning optical system. A developing device that develops a latent image as a toner image, a transfer device that transfers the developed toner image onto a transfer material, and a fixing device that fixes the transferred toner image onto the transfer material. Image forming apparatus. 請求項１乃至４の何れか一項に記載の走査光学装置を複数個有し、前記複数個の走査光学装置に対応した被走査面の夫々に配置された複数の感光体と、前記走査光学系で走査された光束によって前記各感光体上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、各現像器で現像されたトナー像を被転写材に転写する転写器と、各転写器で転写されたトナー像を被転写材に定着させる定着器とを有することを特徴とする画像形成装置。   5. A plurality of scanning optical devices according to claim 1, a plurality of photoconductors disposed on each of scanning surfaces corresponding to the plurality of scanning optical devices, and the scanning optics. A developing device that develops, as a toner image, an electrostatic latent image formed on each of the photosensitive members by a light beam scanned in the system, a transfer device that transfers the toner image developed by each developing device to a transfer material, An image forming apparatus comprising: a fixing device that fixes a toner image transferred by each transfer device to a transfer material. 前記複数の走査光学装置の夫々の光源手段は、複数の光束を出射する請求項６記載の画像形成装置。 The image forming apparatus according to claim 6, wherein each light source unit of the plurality of scanning optical devices emits a plurality of light beams. 請求項１乃至７の何れか１項に記載の走査光学装置と、外部機器から入力したコードデータを画像信号に変換して前記走査光学装置に入力せしめるプリンタコントローラとを有していることを特徴とする画像形成装置。 Wherein the scanning optical apparatus according to any one of claims 1 to 7, that converts code data inputted from an external device into an image signal and a printer controller for inputting the imagewise signal into said optical scanning device An image forming apparatus.