公开(公告)号：US20020051137A1

公开(公告)日：2002-05-02

申请号：US09873256

申请日：2001-06-05

Applicant: RICOH COMPANY, LTD.

Inventor： Hidetoshi Ema ,  Akihisa Itabashi

IPC: B41B001/00

CPC classification number: H04N1/053 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04772 ,  H04N2201/04781 ,  H04N2201/04794

Abstract: In an image forming apparatus which uses a semiconductor laser as a light source, a semiconductor laser is controlled by adjustment of an image write-in clock, and a highly accurate scanning position alignment is performed with a simple structure. An optical unit scans a rotational photo conductor by a laser light output by a semiconductor laser. A photodetector detects the laser light output by the semiconductor laser at a predetermined position. An electrostatic latent image is formed by scanning the rotational photo conductor based on the laser light detected by the photodetector. By dividing a clock output from a high-frequency clock generation circuit, an image clock which synchronized with the output of the photodetector is generated, and the phase of the image clock is changed.

Abstract translation: 在使用半导体激光器作为光源的图像形成装置中，通过调整图像写入时钟来控制半导体激光器，并且以简单的结构执行高精度的扫描位置对准。 光学单元通过半导体激光器输出的激光扫描旋转光导体。 光检测器检测半导体激光器在预定位置输出的激光。 通过基于由光电检测器检测的激光扫描旋转光导体来形成静电潜像。 通过分频来自高频时钟产生电路的时钟输出，产生与光电检测器的输出同步的图像时钟，并且改变图像时钟的相位。

公开(公告)号：US20010050796A1

公开(公告)日：2001-12-13

申请号：US09764262

申请日：2001-01-19

Applicant: RICOH COMPANY, LTD.

Inventor： Akihisa Itabashi

IPC: G02B026/08

CPC classification number: H04N1/4005 ,  B41J2/473 ,  G02B26/123 ,  H04N1/40031

Abstract: In an optical scanning device of the present invention, a plurality of light sources emit a plurality of light beams. An optical system has a rotary polygonal mirror deflecting the light beams from the light sources, the optical system focusing the deflected light beams onto a scanned surface to form light spots thereon, the scanned surface being optically scanned with the light spots by a rotation of the rotary polygonal mirror. A light-amount monitoring unit monitors respective amounts of the light beams emitted by the light sources. A control unit controls the respective amounts of the light beams emitted by the light sources, based on detection signals output from the light-amount monitoring unit. The optical scanning device is configured to satisfy the formula: A

Abstract translation: 在本发明的光学扫描装置中，多个光源发射多个光束。 光学系统具有偏转来自光源的光束的旋转多面镜，光学系统将偏转的光束聚焦到扫描的表面上以在其上形成光斑，扫描的表面通过旋转的光点被光点扫描 旋转多面镜。 光量监视单元监视由光源发射的光束的相应量。 控制单元基于从光量监视单元输出的检测信号来控制由光源发射的光束的各自的量。 光学扫描装置被配置为满足以下公式：A

公开(公告)号：US20010035493A1

公开(公告)日：2001-11-01

申请号：US09827097

申请日：2001-04-06

Applicant: RICOH COMPANY, LTD.

Inventor： Nobuaki Ono ,  Akihisa Itabashi

IPC: H01J003/14

CPC classification number: G02B26/127 ,  G02B26/124

Abstract: A coupling lens couples a beam emitted from a light source. A light deflector deflects the beam from the coupling lens at a uniform angular velocity. A line-image imaging optical system is disposed between the coupling lens and light deflector, and causes the beam to image a line image long along main scanning directions on or in the vicinity of a deflection reflective surface of the light deflector. A scanning and imaging optical system causes the beam deflected by the light deflector to image a beam spot on a medium to be scanned. In an optical housing, the light source, coupling lens, light deflector, line-image imaging optical system and scanning and imaging optical system are disposed, and contained. A plurality of holding and fixing datums are provided for holding and fixing a light-source part including the light source and coupling lens is provided in at least one of the light-source part and optical housing.

Abstract translation: 耦合透镜耦合从光源发射的光束。 光偏转器以均匀的角速度使耦合透镜的光束偏转。 线耦合透镜和光偏转器之间设置线图像成像光学系统，并且使光束沿着偏光反射面的偏转反射面上或其附近的主扫描方向对线像进行成像。 扫描和成像光学系统使由光偏转器偏转的光束在待扫描的介质上成像束斑。 在光学壳体中，设置并包含光源，耦合透镜，光偏转器，线图像成像光学系统和扫描和成像光学系统。 提供多个保持固定基准用于保持和固定包括光源的光源部分，耦合透镜设置在光源部分和光学壳体中的至少一个中。