Optical Receiver Module With Asymmetric Lens Axis Shift

The patent applies asymmetry by intentionally designing an asymmetric offset structure where the optical axis of each condenser lens is deliberately shifted relative to the center of the light receiving element. Specifically, the offset amount in the Y-direction (perpendicular to light propagation) is made larger than the offset in the X-direction (parallel to light propagation), creating an asymmetric configuration that prevents direct alignment. This asymmetric design reduces optical crosstalk between adjacent channels while maintaining sufficient light coupling efficiency, thereby resolving the contradiction between integrated lens array complexity and axis alignment precision.

The patent applies local quality by differentiating the offset amounts in different spatial directions. Specifically, a larger offset is applied in the Y-direction (perpendicular to light propagation) to suppress optical crosstalk between adjacent channels, while a smaller offset is maintained in the X-direction (parallel to light propagation) to preserve light coupling efficiency. This directional differentiation of offset amounts allows the system to simultaneously achieve high transmission efficiency and low optical crosstalk, resolving the contradiction between these two performance parameters.

The patent applies preliminary anti-action by proactively introducing an asymmetric offset between the condenser lens optical axis and the light receiving element center before light transmission occurs. This pre-established offset configuration serves to redirect reflected light away from the optical path before back reflection can occur, thereby simultaneously maintaining high light receiving efficiency and reducing back reflection loss. The asymmetric offset structure acts as a preventive measure that addresses both energy utilization and energy loss concerns.