An oven device for final finishing of a food item includes an oven housing defining a heating cavity configured to receive at least one food item to be heated, and an upper heating unit within the oven housing above the heating cavity. The slat reflectors 27, 30, 31, 38, 39, 60, 61, 79, 90-92 receive and radiate sun 62 on their upper side 65, 100, 101. This region enables a wide band of photons to be sensed by the photosensitive silicon of the CCD.