公开(公告)号：US06781947B2

公开(公告)日：2004-08-24

申请号：US09955977

申请日：2001-09-20

申请人： Takehiro Motegi ,  Shinichi Takahashi ,  Mitsutoshi Sugano ,  Ko Ishii ,  Yoshihiro Seita ,  Makoto Kawamura

发明人： Takehiro Motegi ,  Shinichi Takahashi ,  Mitsutoshi Sugano ,  Ko Ishii ,  Yoshihiro Seita ,  Makoto Kawamura

IPC分类号： G11B700

CPC分类号： G11B7/127 ,  G11B7/126 ,  G11B7/1356 ,  G11B7/1362 ,  G11B2007/0006

摘要： Laser beams h1, h2 with different wavelengths emitted from semiconductor lasers 2a, 3 are incident to an optical path joint prism 13 and each of optical intensities of the laser beams h1, h2 is detected by a photoelectric conversion element 15 provided in an optical path integrated by the optical path joint prism 13 on which a semi-transmission film HM is provided and APC control of each of light emission intensities of the semiconductor lasers 2a, 3 is performed on a basis of each of detection results. As a result of this, the beam intensity of the laser beam h1 passing through the optical path joint prism 13 to be applied to an information recording medium and the laser beam h2 reflecting the optical path joint prism 13 to be applied to the information recording medium are controlled properly.

摘要翻译： 从半导体激光器2a，3发射的具有不同波长的激光束h1，h2入射到光路接合棱镜13，激光束h1，h2的每个光强度由设置在光路集成的光路中的光电转换元件15检测 通过其上设置有半透射膜HM的光路接合棱镜13，并且基于每个检测结果执行对半导体激光器2a，3的每个发光强度的APC控制。 其结果是，将通过光路连接棱镜13的激光束h1的光束强度施加到信息记录介质上，反射光路连接棱镜13的激光束h2被施加到信息记录介质 被正确控制

公开(公告)号：US06798727B2

公开(公告)日：2004-09-28

申请号：US09955978

申请日：2001-09-20

申请人： Takehiro Motegi ,  Shinichi Takahashi ,  Mitsutoshi Sugano ,  Ko Ishii ,  Makoto Kawamura ,  Yoshihiro Seita

发明人： Takehiro Motegi ,  Shinichi Takahashi ,  Mitsutoshi Sugano ,  Ko Ishii ,  Makoto Kawamura ,  Yoshihiro Seita

IPC分类号： G11B700

CPC分类号： G11B7/127 ,  G11B7/126 ,  G11B7/1356 ,  G11B7/1362 ,  G11B2007/0006

摘要： A reflective mirror 14 is inclined and placed with respect to an objective lens 16 and a photoelectric conversion element 15 for monitor is placed in the back side of the reflective mirror 14. The reflective mirror 14 is formed into a structure in which a semi-transmission film HM having predetermined reflectance and transmittance is formed on one surface of a substrate of a transparent medium. When a laser beam for information record or information reproduction is launched from semiconductor lasers 2a, 3 to the reflective mirror 14, the semi-transmission film HM splits the laser beam into a reflected beam and a transmitted beam and the reflected beam is emitted to the side of the objective lens 16 and the transmitted beam is emitted to the side of the photoelectric conversion element 15. As a result of this, any laser beams for the information record and the information reproduction can be detected by one photoelectric conversion element 15 to perform APC control of the semiconductor lasers 2a, 3 and the intensity of the laser beam for the information record and the information reproduction with respect to an information record medium can be controlled properly.

摘要翻译： 反射镜14相对于物镜16倾斜并放置，并且用于监视器的光电转换元件15被放置在反射镜14的背面。反射镜14形成为半透射的结构 在透明介质的基板的一个表面上形成具有预定反射率和透射率的膜HM。 当用于信息记录或信息再现的激光束从半导体激光器2a，3发射到反射镜14时，半透射膜HM将激光束分成反射光束和透射光束，并将反射光束发射到 物镜16的一侧，并且透射光束被发射到光电转换元件15的一侧。结果，可以由一个光电转换元件15检测用于信息记录和信息再现的任何激光束以执行 可以适当地控制半导体激光器2a，3的APC控制和用于信息记录的激光束的强度和关于信息记录介质的信息再现。