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41. 发明授权

US07260336B2 Image forming apparatus and image forming method for performing density control of toner images 失效
标题翻译：用于执行调色剂图像的浓度控制的图像形成装置和图像形成方法
公开(公告)号：US07260336B2
公开(公告)日：2007-08-21
申请号：US11432347
申请日：2006-05-12
申请人： Hidetsugu Shimura , Takashi Hama , Yoshihiro Nakashima
发明人： Hidetsugu Shimura , Takashi Hama , Yoshihiro Nakashima
IPC分类号： G03G15/00
CPC分类号： G03G15/5041 , G03G15/0855 , G03G15/0863 , G03G15/5058 , G03G2215/00042 , G03G2215/00059
摘要： In a density control technique wherein a density of a toner image formed as a patch image is detected for performing density control based on the detected result, detection errors are decreased so as to properly set a density control factor. The density control factor is optimized based on a variation rate of the patch image densities against a varied density control factor. The detected results of the patch image densities are corrected based on information on an image carrier acquired before the formation of the patch images.
摘要翻译：在密度控制技术中，基于检测结果检测形成为补片图像的调色剂图像的浓度，以进行浓度控制，降低检测误差，从而适当地设定浓度控制因子。密度控制因子基于斑块图像密度对不同密度控制因子的变化率进行优化。基于在形成补丁图像之前获取的图像载体的信息来校正斑块图像浓度的检测结果。

42. 发明申请

US20060165426A1 Image forming apparaus and image forming method 失效
标题翻译：图像形成和成像方法
公开(公告)号：US20060165426A1
公开(公告)日：2006-07-27
申请号：US11378425
申请日：2006-03-20
申请人： Hidetsugu Shimura , Takashi Hama
发明人： Hidetsugu Shimura , Takashi Hama
IPC分类号： G03G15/00 , G03G15/06
CPC分类号： B41J2/41
摘要： Optimization of a density control factor accompanying formation of a patch image is executed every time a predetermined period of time elapses since the end of a preceding image forming operation. Since an image is formed at regular intervals in this manner, it is possible to suppress a density variation which is created as toner carried on a developer roller is left unused for long. This effect further improves when the developer roller is rotated idle prior to formation of a patch image or regularly at predetermined timing.
摘要翻译：每当从先前图像形成操作结束起经过预定时间段时，执行伴随形成贴片图像的浓度控制因子的优化。由于以这种方式以规则的间隔形成图像，所以可以抑制由于在显影辊上承载的调色剂长时间不使用而产生的浓度变化。当显影辊在形成贴片图像之前或者在预定的时刻定期旋转时，这种效果进一步改善。

43. 发明授权

US5883732A Optical scanner 失效
标题翻译：光学扫描仪
公开(公告)号：US5883732A
公开(公告)日：1999-03-16
申请号：US644493
申请日：1996-05-10
申请人： Kyu Takada , Nozomu Inoue , Takashi Hama , Yujiro Nomura
发明人： Kyu Takada , Nozomu Inoue , Takashi Hama , Yujiro Nomura
IPC分类号： B41J2/44 , G02B13/00 , G02B26/10 , G02B26/12 , G02B26/08
CPC分类号： G02B26/125 , G02B13/0005
摘要： To provide an optical scanner for typical use with laser beam printers that is capable of effective correction of aberrational characteristics and which also produces a constant beam spot size, a semiconductor laser array 1 having a plurality of light-emitting portions issues a plurality of beams, which are reflected and deflected by reflecting surfaces of rotating polygonal mirror 5 and pass through imaging lens 6 to form a plurality of beam spots on the surface to be scanned 7. Both the entrance and exit surfaces of imaging lens 6 are such that the curvatures in the sub- and main scanning directions are independent of each other, with the curvature in the sub-scanning direction varying continuously in the main scanning direction over the effective area of imaging lens 6.
摘要翻译：为了提供能够有效校正像差特性并且还产生恒定光斑尺寸的激光束打印机的典型应用的光学扫描器，具有多个发光部分的半导体激光器阵列1发出多个光束，它们通过旋转多面镜5的反射表面反射和偏转，并通过成像透镜6，以在待扫描的表面上形成多个光束点。成像透镜6的入射面和出射面都是这样的：子扫描方向和主扫描方向彼此独立，副扫描方向的曲率在成像透镜6的有效区域上的主扫描方向上连续变化。

44. 发明授权

US5877883A Optical scanner 失效
标题翻译：光学扫描仪
公开(公告)号：US5877883A
公开(公告)日：1999-03-02
申请号：US22557
申请日：1998-02-12
申请人： Nozomu Inoue , Takashi Hama , Yujiro Nomura , Kyu Takada
发明人： Nozomu Inoue , Takashi Hama , Yujiro Nomura , Kyu Takada
IPC分类号： G02B26/12 , G02B26/08
CPC分类号： G02B26/12
摘要： An optical scanner that has a simple construction and which yet exhibits satisfactory imaging performance under varying temperature conditions. Of the two orthogonal scanning cross sections of scanning optics (i.e., the main and sub-scanning cross sections), the one that involves the greater movement of the image plane due to the temperature-dependent changes in optical characteristics (e.g. the variation in the operating wavelength of a light source, the index variation of a lens material and the thermal expansion of a lens itself) is adapted to be the same as the other cross section that involves the greater movement of the image plane due to the change in the distance from the light source to a collimator lens. If necessary, additional correction is effected in such a way that the scanning cross section that involves the greater overall movement of the image plane after correction for temperature changes is adapted to be different from the cross section that involves the greater amount of optical field curvature.
摘要翻译：一种光学扫描仪，具有简单的结构，并且在变化的温度条件下表现出令人满意的成像性能。在扫描光学器件的两个正交扫描横截面（即主扫描和副扫描截面）中，由于光学特性的温度依赖性变化（例如，光源的工作波长，透镜材料的折射率变化和透镜本身的热膨胀）适合于与由于距离变化引起的图像平面更大移动的另一横截面相同从光源到准直透镜。如果需要，进行附加的校正，使得在校正温度变化之后涉及图像平面的更大整体运动的扫描横截面适于与涉及更大量的光场曲率的横截面不同。

45. 发明授权

US5600476A Optical scanner 失效
标题翻译：光学扫描仪
公开(公告)号：US5600476A
公开(公告)日：1997-02-04
申请号：US451396
申请日：1995-05-26
申请人： Kyu Takada , Nozomu Inoue , Takashi Hama , Yujiro Nomura
发明人： Kyu Takada , Nozomu Inoue , Takashi Hama , Yujiro Nomura
IPC分类号： B41J2/44 , G02B5/09 , G02B26/10 , G02B26/12 , G03G15/04 , G02B26/08
CPC分类号： G02B5/09 , G02B26/125
摘要： An optical scanner for use in laser beam printers and the like which is particularly satisfactory in imaging characteristics. A light beam from a semiconductor laser passes through a collimator lens, an aperture diaphragm and a cylindrical lens. The beam is then deflected by a rotating lens mirror and subjected to the focusing action of an imaging lens so that it is focused to form a beam spot, which scans over a scan surface as the beam is deflected. The imaging lens has aspheric surfaces in the main-scanning cross section and is designed so that the rate of change in its curvature and other relevant parameters satisfy a predetermined equation so as to lie within a predetermined range.
摘要翻译：用于激光束打印机等的光学扫描仪，其特别令人满意的成像特性。来自半导体激光器的光束通过准直透镜，孔径光阑和柱面透镜。然后光束被旋转透镜反射镜偏转并经受成像透镜的聚焦作用，使得其被聚焦以形成光束点，当光束被偏转时扫描光束点在扫描表面上扫描。成像透镜在主扫描横截面中具有非球面，并且被设计成其曲率变化率和其它相关参数满足预定方程以便处于预定范围内。

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