US Patent 10899275 Vehicular camera with PCB focus tuning

A camera for a vehicular vision system includes a circuit board having a first surface and a second surface opposite the first surface. The circuit board has a first coefficient of thermal expansion (CTE). An imager is disposed at the first surface of the circuit board, and a lens assembly is at the imager. A bend-countering element is disposed at one of the first side and the second side of the circuit board. The bend-countering element has a second CTE that is different from the first CTE of the circuit board. The bend-countering element is selected so that, with the camera disposed at the vehicle, the bend-countering element counters temperature-induced bending of the circuit board to maintain focus of the lens assembly at the imager.