公开(公告)号：US5331343A

公开(公告)日：1994-07-19

申请号：US791045

申请日：1991-11-12

申请人： Satoru Ono ,  Jun Kohsaka

发明人： Satoru Ono ,  Jun Kohsaka

IPC分类号： B41J2/47 ,  G02B7/02 ,  B41J2/435

CPC分类号： B41J2/471 ,  G02B7/02

摘要： An optical apparatus includes a laser beam emitter for outputting a laser beam modulated in accordance with image information, and a lens unit resting on a lens mount. The lens unit includes, all formed integral with one another, an effective lens portion, a cylindrical portion surrounding a side surface of the effective lens portion, and projections extending from peripheral positions of the cylindrical portion. The lens mount includes a holder for holding the cylindrical portion of the lens unit to be rotatable and axially slidable on an optical axis of the laser beam, and a groove formed in the bottom of the holder for receiving the projection.

摘要翻译： 光学装置包括用于输出根据图像信息调制的激光束的激光束发射器和放置在透镜座上的透镜单元。 所述透镜单元包括彼此一体形成的有效透镜部分，围绕所述有效透镜部分的侧表面的圆柱形部分和从所述圆柱形部分的周边位置延伸的突起。 透镜座包括保持器，用于保持透镜单元的圆柱形部分能够在激光束的光轴上旋转和轴向滑动;以及形成在保持器的底部中的用于接收突起的凹槽。

公开(公告)号：US6072176A

公开(公告)日：2000-06-06

申请号：US52032

申请日：1998-03-31

申请人： Jun Kohsaka ,  Nobuo Kanai

发明人： Jun Kohsaka ,  Nobuo Kanai

IPC分类号： B41J2/44 ,  B41J2/47 ,  G02B26/10 ,  G02B26/12 ,  H04N1/113 ,  H01J3/14

CPC分类号： B41J2/471 ,  G02B26/128

摘要： A laser beam optical scanning device which focuses and scans a laser beam emitted from laser diode 1 in the arrow b direction on a photosensitive drum 40 via focusing lens 3, polygonal mirror 6, and f.theta. lens 7. The scanning laser beam enters a convergence state detector 10, which detects the amount of dislocation of the convergence position. The amount of positional change is calculated to correct the convergence position based on the detected amount of dislocation, and the focusing lens 3 is moved on the optical axis of the lens via motor 21 to correct the beam convergence position. When processing is executed to correct the convergence position in the intermediate zone of the image formign range and the calculated amount of positional change exceeds a limit value, a detection error is assumed, and the focusing lens 3 is moved an amount less than the limit value.

摘要翻译： 一种激光束光学扫描装置，其通过聚焦透镜3，多面镜6和fθ透镜7在激光二极管1上沿箭头b方向发射的激光束在感光鼓40上聚焦和扫描。扫描激光束进入会聚 状态检测器10，其检测会聚位置的位错量。 计算位置变化量，根据检测到的位错量来校正收敛位置，聚焦透镜3通过电动机21在透镜的光轴上移动，以校正光束会聚位置。 当执行处理以校正图像形成范围的中间区域中的会聚位置并且计算出的位置变化量超过极限值时，假设检测误差，并且聚焦透镜3移动小于极限值 。

公开(公告)号：US6157478A

公开(公告)日：2000-12-05

申请号：US773644

申请日：1996-12-24

申请人： Toshio Naiki ,  Nobuo Kanai ,  Jun Kohsaka ,  Kenji Takeshita

发明人： Toshio Naiki ,  Nobuo Kanai ,  Jun Kohsaka ,  Kenji Takeshita

IPC分类号： B41J2/44 ,  G02B19/00 ,  G02B26/10 ,  G02B26/12 ,  G02B26/08

CPC分类号： G02B26/123 ,  B41J2/473

摘要： In a multibeam scanning optical apparatus of a type where two parallel lines are simultaneously scanned by two laser beams irradiated from two semiconductor lasers, stable images are formed on the scanned surface by the two laser beams and the cost is reduced. The two laser beams irradiated from the two semiconductor lasers are directed substantially in the same direction through a beam splitter and then shaped by a condenser lens into two luminous fluxes whose optical axes are substantially parallel to each other. In another arrangement, the semiconductor lasers are directly secured to a surface of the beam splitter by use of an ultraviolet setting resin.

摘要翻译： 在通过从两个半导体激光器照射的两个激光束同时扫描两条平行线的多光束扫描光学装置中，通过两个激光束在扫描表面上形成稳定的图像，并降低成本。 从两个半导体激光器照射的两个激光束通过分束器基本上指向相同的方向，然后通过聚光透镜成形为两个光束，其光轴基本上彼此平行。 在另一种布置中，半导体激光器通过使用紫外线固化树脂直接固定到分束器的表面。

公开(公告)号：US6118570A

公开(公告)日：2000-09-12

申请号：US898615

申请日：1997-07-22

申请人： Nobuo Kanai ,  Jun Kohsaka ,  Hiroshi Hiraguchi

发明人： Nobuo Kanai ,  Jun Kohsaka ,  Hiroshi Hiraguchi

IPC分类号： B41J2/44 ,  G02B13/24 ,  G02B26/10 ,  G02B26/12 ,  G02B26/08

CPC分类号： G02B26/128

摘要： A laser beam scanning optical apparatus has a focusing lens having different optical powers in the main scanning direction and the sub-scanning direction, moving means for moving the focusing lens on an optical direction, detecting means for detecting a state of convergence of the laser beam on a scanned surface, and control means for adjusting the convergence position of the laser beam by moving the focusing lens via driving said moving means based on the detection result of the detection means. In the aforementioned construction, the state of the convergence of the laser beam on a scanned surface is adjusted in the main scanning direction and the sub-scan direction by moving the focusing lens in an optical axis. The focusing lens is moved to a position of optimum convergence based on the construction of the optical system by detecting the state of convergence in the main scan direction and the sub-scan direction via a detecting means.

摘要翻译： 激光束扫描光学装置具有在主扫描方向和副扫描方向上具有不同光焦度的聚焦透镜，用于在光学方向上移动聚焦透镜的移动装置，用于检测激光束的会聚状态的检测装置 以及控制装置，用于根据检测装置的检测结果，通过驱动所述移动装置移动聚焦透镜来调节激光束的会聚位置。 在上述结构中，通过沿着光轴移动聚焦透镜，在主扫描方向和副扫描方向上调整激光束在扫描面上的会聚状态。 通过检测主扫描方向和副扫描方向的会聚状态，聚焦透镜基于光学系统的结构移动到最佳会聚位置。

公开(公告)号：US5969346A

公开(公告)日：1999-10-19

申请号：US887460

申请日：1997-07-02

申请人： Yasushi Nagasaka ,  Kenji Takeshita ,  Hiroshi Hiraguchi ,  Jun Kohsaka ,  Nobuo Kanai ,  Keiji Ogoh

发明人： Yasushi Nagasaka ,  Kenji Takeshita ,  Hiroshi Hiraguchi ,  Jun Kohsaka ,  Nobuo Kanai ,  Keiji Ogoh

IPC分类号： G02B26/12 ,  H01J3/14 ,  G01J1/20 ,  G02B26/08

CPC分类号： G02B26/128

摘要： A laser beam scanning optical apparatus which images and scans a laser beam emitted from a laser diode on a photo-sensitive drum through a focusing lens, a polygon mirror and an f.theta. lens. An SOS photosensor detects the scanned laser beam and generates a detection signal. The laser diode is controlled to perform pulse emission a specified time after the generation of the detection signal. The pulse beam is incident to a beam detector which adopts a knife edge method, and the amount of a focal shift is detected. The focusing lens is moved along the optical axis in accordance with the detected amount of a focal shift to correct the position of the image point.

摘要翻译： 一种激光束扫描光学装置，其通过聚焦透镜，多面镜和fθ透镜对从感光鼓上的激光二极管发射的激光束进行成像和扫描。 SOS光电传感器检测扫描的激光束并产生检测信号。 控制激光二极管在产生检测信号之后的指定时间内执行脉冲发射。 脉冲光束入射到采用刀刃法的光束检测器，并检测焦点偏移量。 根据检测到的焦点偏移量，聚焦透镜沿着光轴移动以校正图像点的位置。

公开(公告)号：US5808775A

公开(公告)日：1998-09-15

申请号：US814217

申请日：1997-03-11

申请人： Yoshihiro Inagaki ,  Nobuo Kanai ,  Jun Kohsaka ,  Kenji Takeshita ,  Keiji Ogoh ,  Hidenari Tachibe

发明人： Yoshihiro Inagaki ,  Nobuo Kanai ,  Jun Kohsaka ,  Kenji Takeshita ,  Keiji Ogoh ,  Hidenari Tachibe

IPC分类号： B41J2/44 ,  G02B13/00 ,  G02B13/18 ,  G02B26/10 ,  G02B26/12 ,  G02B26/08

CPC分类号： G02B26/124

摘要： A laser beam scanning optical apparatus which has a laser source unit, a collimator lens, a cylindrical lens, a polygon mirror and a scanning lens with an f.theta. function. The collimator lens is a bifocal lens, and because of the bifocal collimator lens, a part of the laser beam is focused on a point before the surface of a photosensitive member, and another part of the laser beam is focused on a point after the surface of the photosensitive member. Also, the cylindrical lens can be a bifocal lens. In this case, even when the magnification ratio in the sub scanning direction is designed small, the focal length of the cylindrical lens does not have to be lengthened.

摘要翻译： 一种具有激光源单元，准直透镜，柱面透镜，多面镜和具有fθ函数的扫描透镜的激光束扫描光学装置。 准直透镜是双焦点透镜，并且由于双焦点准直透镜，激光束的一部分聚焦在感光构件表面之前的点，并且激光束的另一部分聚焦在表面之后的点 的光敏元件。 此外，柱面透镜可以是双焦点透镜。 在这种情况下，即使将副扫描方向的倍率设计得较小，也不必延长柱面透镜的焦距。