Patent ID: 8847147

Claim:
An optical-electrical module, comprising: a base board; a laser diode fixed on the base board and having a transmitting window at an end of the laser diode away from the base board; an integrated circuit driving the laser diode to transmit optical signals; a lens unit converging and transmitting optical signals, the lens unit comprising a rectangular base plate, four sidewalls extending substantially perpendicular from the base plate, a first reflector, a first convex lens, and a second convex lens, wherein the four sidewalls are fixed to the base board, the first reflector is in an interior of the lens unit such that the first reflector reflects the optical signals transmitted from the laser diode and optical signals reflected from the first reflector are substantially parallel to the base board, the first convex lens is on the light transmitting area opposite to the transmitting window adjacent to the first reflector and is positioned in an interior of the rectangular base plate, and the second convex lens is at an end of the base plate converging the optical signals reflected by the first reflector; and a metal film formed on the inner surfaces of the lens unit except on the light transmitting areas, the metal film preventing the EMI leakage from the optical-electrical module.