公开(公告)号：US5240336A

公开(公告)日：1993-08-31

申请号：US688680

申请日：1991-04-22

申请人： Tadashi Shiraishi ,  Yutaka Miyazono ,  Seiji Kimura ,  Syogo Horinouchi ,  Yuuji Terashima ,  Takashi Haruguchi ,  Kazumi Ootubo

发明人： Tadashi Shiraishi ,  Yutaka Miyazono ,  Seiji Kimura ,  Syogo Horinouchi ,  Yuuji Terashima ,  Takashi Haruguchi ,  Kazumi Ootubo

IPC分类号： B41J2/505 ,  B41J29/10

CPC分类号： B41J2/5056 ,  B41J29/10

摘要： A dot matrix printer of a dispersion printing type in which a printing noise is suppressed and dots arranged in longitudinal rows are driven while shifting the timing for every print wire dot. The present dot matrix printer is characterized by a construction in which respective print wires are driven at different timings within one pitch, and a space around a print head is surrounded by a housing and a platen, and a sound generated in the space is transmitted outside through walls. Further, the present dot matrix printer is characterized in that there is provided a memory storing printing intervals among the whole dots and print head conduction time, and the print head is driven in accordance with information read out of said memory in order to correct deviation of dot rows arranged in a longitudinal direction of the print head from perpendicularity. According to the present dot matrix printer, since the print head is driven at a high frequency by an inexpensive control unit, the noise frequency at printing with the print head becomes high, and the generated noise is transmitted outside through walls. Therefore, attenuation in a high-pitched tone compass is large through walls, thus exhibiting an effect that the operation sound of the printer leaking outside is made smaller.

公开(公告)号：US5777975A

公开(公告)日：1998-07-07

申请号：US603766

申请日：1996-02-20

申请人： Syogo Horinouchi ,  Shigeki Takeuchi ,  Hideki Yoshinaka ,  Toshihiro Koga ,  Kazuhiko Higo ,  Hidehiro Kugisaki ,  Fumiaki Beppu ,  Jiro Mimasa

发明人： Syogo Horinouchi ,  Shigeki Takeuchi ,  Hideki Yoshinaka ,  Toshihiro Koga ,  Kazuhiko Higo ,  Hidehiro Kugisaki ,  Fumiaki Beppu ,  Jiro Mimasa

IPC分类号： G02B6/32 ,  G02B6/42 ,  G02B27/28 ,  G11B7/09 ,  G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  G11B7/22 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1356 ,  G02B27/283 ,  G11B11/10543 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1372 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/22

摘要： A light source beam is incident on an optical guide block and converted in its diffusion angle by a diffusion angle conversion film on a second inclined portion of the optical guide block, and reflected by a reflecting film on a first inclined portion. Then, the light is incident on a first beam splitter film on the second inclined portion and split into transmitted light and reflected light. The reflected light is focused an optical disk light reflected from the disc passes through the first beam splitter film, and then is transmitted and reflected by a second beam splitter film on a third inclined portion. This transmitted light is incident on a polarization plane conversion plate between the third inclined portion and a fourth inclined portion, so that P and S polarization components and are transmitted through and reflected by its polarized light splitting portion, respectively. The S polarization component is reflected by its reflecting surface toward light-receiving elements. The reflected light from the second beam splitter film is reflected by a focus error detection element on the second inclined portion, and an incident light-splitting point of the polarized light splitting portion is located between the center of the optical guide block and the light-receiving elements, thereby reducing a light amount loss and also increasing a Kerr rotation angle so that an RF reproduction signal with a high C/N ratio can be obtained.

摘要翻译： 光源光束入射到光导块上，并且通过扩散角转换膜在光导块的第二倾斜部分上被扩散角度转换，并由第一倾斜部分上的反射膜反射。 然后，光入射到第二倾斜部分上的第一分束器膜上并分裂成透射光和反射光。 反射光被聚焦，从盘反射的光盘光通过第一分束器膜，然后在第三倾斜部分上被第二分束器膜透射和反射。 该透射光入射到第三倾斜部分和第四倾斜部分之间的偏振平面转换板上，使得P和S偏振分量分别透射并由其偏振光分离部分反射。 S偏振分量被其反射表面反射到光接收元件。 来自第二分束器膜的反射光由第二倾斜部分上的聚焦误差检测元件反射，并且偏振光分离部分的入射光分离点位于光导块的中心和发光元件之间， 接收元件，从而减少光量损失并且还增加克尔旋转角度，使得可以获得具有高C / N比的RF再现信号。