1. A household appliance constructed in the form of a microwave appliance, comprising:a food treatment chamber including a loading opening which is closeable by a door, said food treatment chamber being exposable to microwaves;
a viewing window;
a shielding plate received in the viewing window and including a number of holes; and
a camera for observation of the food treatment chamber through the viewing window, said camera being directly fastened to holes of the number of holes in the shielding plate and directed onto the shielding plate such that at least one hole of the number of holes is in a field of view of the camera,
wherein the viewing window is positioned between the camera and the food treatment chamber when the door is in a closed position.