A light detection and ranging (LIDAR) system includes a light detector having a first scanning mirror and a light sensor aligned with the first scanning mirror. The first scanning mirror is configured to rotate about a first axis and to reflect incident light pulses toward the light sensor at different angles of rotation with respect to the first axis. The light sensor is configured to detect reflected light pulses from the first scanning mirror over a range of the angles of rotation. An input area of the light detector has a non-uniform sensitivity response along a first direction.