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    • 5. 发明公开
    • Many-sided reflection prism and optical pickup
    • 反射式反射和反射器Abtastkopf
    • EP1256945A3
    • 2006-06-14
    • EP02253263.4
    • 2002-05-09
    • SAMSUNG ELECTRONICS CO., LTD.
    • Kim, Dae-sikCho, Kun-hoHong, Soon-kyoKim, Young-ilIm, Kwang-supLee, Ho-cheolKim, Dae-hwan
    • G11B7/135G02B5/04
    • G11B7/1359G02B5/04G11B2007/0006
    • Provided is a many-sided reflection prism (20) formed as a single body with a plurality of reflection faces (23,25,27,29) which guides a light beam incident through a transmission face in a horizontal direction (ho) perpendicular to a height direction (hi) by reducing a size of the light beam in the height direction by using a difference in angles between the reflection faces (25,27) and reflects the guided light beam in the height direction by one reflection face (29) of an angle less than 45° with respect to the horizontal direction. By using the many-sided reflection prism, the height of an optical system can be reduced regardless of the wavelength used without reducing light beam size, and slim-sized optical pickups can be implemented.
    • 提供了形成为具有多个反射面(23,25,27,29)的多个单面反射棱镜(20),该多个反射面(23,25,27,29)在垂直于水平方向(ho)的位置引导通过透射面入射的光束 通过使用反射面(25,27)之间的角度差来减小光束在高度方向上的尺寸,并且通过一个反射面(29)将导向光束在高度方向上反射的高度方向(hi) 相对于水平方向具有小于45°的角度。 通过使用多面反射棱镜,可以减小光学系统的高度,而不管所使用的波长如何,而不会减小光束尺寸,并且可以实现纤细尺寸的光学拾取器。