3D camera and method for capturing of three-dimensional image data

A 3D camera (10) is provided with at least one image sensor (16, 16a-b) for capturing three-dimensional image data from a surveillance area (12, 34, 36) and with a mirror optics (38) arranged upstream of the image sensor (16, 16a) for extending the field of view (44). The mirror optics (38) has a front mirror surface (40) and a rear mirror surface (42) and is arranged in the field of view (44) of the image sensor (16, 16a-b) such that the front mirror surface (40) generates a first partial field of view (34) over a first angular range and the rear mirror surface (42) generates a second partial field of view (36) over a second angular range, wherein the first angular range and the second angular range do not overlap and are separated from one another by unmonitored angular ranges.