| 主权项 |
1. An optical coupler comprising:
a main body, the main body being substantially cuboid in shape with a top surface, a bottom surface substantially parallel to the top surface, and a front surface substantially perpendicular to the top and bottom surfaces; a first convergent lens; a second convergent lens; wherein, the main body defining a bottom groove in the bottom surface, the bottom groove comprising:
a first surface being inclined relative to the bottom surface;a second surface being substantially parallel to the bottom surface, the first surface and the second surface being located on a bottom portion of the bottom groove, the first convergent lens is positioned on the second surface; wherein, the main body defining a top groove in the top surface, the top groove having a third surface and a fourth surface closest to the bottom surface, the third surface and the fourth surface being inclined relative to the bottom surface; wherein, the second convergent lens is positioned on the front surface; and wherein, the top and bottom grooves are formed, the first and second convergent lens are positioned, so that when an incident light beam is received at the first surface at a predetermined incident angle, the light beam is divided into a first light beam portion and a second light beam portion according to a predetermined ratio, the first light beam portion being reflected to the second convergent lens and the second light beam portion being refracted and projected onto the third surface, the third surface then reflecting the second light beam portion onto the fourth surface so that the second light beam portion is reflected to the first convergent lens. |
