| 摘要 |
PURPOSE:To obtain an optical branching device suitable for massproduction while facilitating the assembly by providing a housing body which has >= orthogonal holes, collimators which are fitted precisely in the holes of the housing, and a mirror supporting body for holding a half-mirror. CONSTITUTION:The optical branching device has the collimator 16, housing body 17, half-mirror 19, and supporting body 18 which supports the half-mirror 19. Then, the housing body 17 has two orthogonal through holes precisely; and collimators 14-16 are fitted precisely in those two through holes in three directions, and the mirror supporting body 18 is also fitted precisely in the one remaining direction. Consequently, the low-loss optical branching device which is suitable for mass-production and assembled easily is obtained. |
