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    • 78. 发明公开
    • Optical switch
    • 光开关
    • EP0718657A3
    • 1996-09-04
    • EP96103679.5
    • 1989-12-27
    • FUJI ELECTRIC CO., LTD.
    • Sano, YasukazuTanaka, HideyukiNakamura, KeijirouKume, HideoTanigawa, Kiyoshi
    • G02B26/02
    • G02B6/353G02B6/3514G02B6/352G02B6/355G02B6/3552G02B6/3574H03K17/941
    • An optical switch having two spherical or elliptical corner-reflecting surfaces (5c) provided in a light-conducting member (5, 10), a shutter (8) to open and close a light path between the corner-reflecting surfaces, and focusing lenses (5b) to focus the incident beam from an emitting optical fiber (3) and to focus the emitting beam from the light-conducting member to a primary receiving optical fiber (4). Because almost all the beam transmitted through the light-conducting member is focused at one point (A) in an air gap (5d) in which the shutter moves, the optical switch can transmit the beam with high efficiency without leakage to the outside, and a small stroke of the shutter is sufficient to completely transmit or stop the beam. In another similar optical switch having a reflecting surface (11a) at the tip of the shutter (8) for inclining the beam, as well as having a secondary receiving optical fiber (12) aligned with the path of the inclined beam, the beam is switched to be transmitted to the primary receiving optical fiber (4) or to the secondary receiving optical fiber (12) according to the position of the shutter. Thus, the ON/OFF state of the optical switch can be indicated, or a transfer-type optical switch can be obtained by using the secondary receiving optical fiber as well as the primary receiving optical fiber as switching circuits.
    • 一种光开关,其具有设置在光导构件(5,10)中的两个球形或椭圆形角反射表面(5c),打开和关闭角反射表面之间的光路的快门(8),以及聚焦透镜 (5b)聚焦来自发射光纤(3)的入射光束并将来自光导构件的发射光束聚焦到主接收光纤(4)。 因为通过光导构件传播的光束几乎全部聚焦在光闸移动的气隙(5d)中的一个点(A)处,所以光开关能够以高效率传输光束而不泄漏到外部,并且 快门的小行程足以完全传送或停止光束。 在另一种类似的光开关中,在光闸倾斜的快门(8)顶端具有反射表面(11a),并且具有与倾斜光束路径对齐的次级接收光纤(12),该光束是 根据快门的位置切换到主接收光纤(4)或次接收光纤(12)。 因此,可以指示光开关的开/关状态,或者通过使用辅助接收光纤以及主接收光纤作为开关电路,可以获得转移型光开关。