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    • 61. 发明授权
    • Simple magneto-optic rewritable head for roughedized environments
    • 简单的磁光可挠性头对于粗糙的环境
    • US5200946A
    • 1993-04-06
    • US771042
    • 1991-10-02
    • Bernard S. Fritz
    • Bernard S. Fritz
    • G11B7/09G11B7/1356G11B11/10G11B11/105
    • G11B7/1356G11B11/10545G11B11/10576G11B7/0909
    • An optical recording head for use with a magneto optical recording device wherein a rhomboid prism is utilized having a single PBS coating thereon and being totally internally reflective so that light from a source will pass through the PBS coating once, be totally internally reflected, pass through the PBS coating a second time to form first and second beams, the first passing to the recording apparatus and the second being reflected to pass to a detector to monitor the intensity of the radiation. Light from the recording apparatus containing information is reflected back through the PBS coating to form third and fourth beams, the third being reflected to suitable detecting means and the fourth being passed through the rhomboid prism where it is internally totally reflected and emerges to a detector which is used for monitoring the focal position of the objective lens.
    • 一种与磁光记录装置一起使用的光记录头,其中使用菱形棱镜,其上具有单一的PBS涂层,并且是完全内反射的,使得来自源的光将通过PBS涂层一次,完全内部反射,通过 第二次PBS涂覆以形成第一和第二光束,第一光束首先传递到记录装置,第二光束被反射以传递到检测器以监测辐射的强度。 来自包含信息的记录装置的光通过PBS涂层反射回来形成第三和第四光束,第三光束被反射到合适的检测装置,第四光束通过菱形棱镜,在其内部被完全反射并出射到检测器 用于监视物镜的焦点位置。