A time-of-flight, TOF, sensor device (202, 2102), comprising: an illumination component (204, 2108) configured to emit a light beam in a first direction toward a viewing space; a first distance determination component (206, 2114) configured to generate first distance information for a pixel corresponding to an object in the viewing space based on time-of-flight analysis of reflected light incident on a photo-receiver array; a light path switching component configured to cause the illumination component to redirect the light beam in another direction from the illumination component to a calibration light path in response to initiation of a calibration sequence, the calibration light path directing the redirected light to the photo-receiver array over a specified distance; a receiving lens element configured to receive the reflected light and to direct the reflected light to the photo-receiver array; and a calibration component configured to calibrate the first distance determination component based on a difference between the specified distance and a distance value calculated for the redirected light received through the calibration light path at the photo-receiver array, wherein the light path switching component is configured to redirect the light beam from the illumination component to a calibration light path by redirecting the light beam from the illumination component to a surface of a housing of the TOF sensor device, wherein the redirecting of the light beam to the surface of the housing causes parasitic reflections to fall back to the receiving lens element, which directs the reflected light to the photo-receiver array, and wherein the specified distance comprises a length of the light path from the illumination component to the photo-receiver array via the surface of the housing. an illumination component (204, 2108) configured to emit a light beam in a first direction toward a viewing space; a first distance determination component (206, 2114) configured to generate first distance information for a pixel corresponding to an object in the viewing space based on time-of-flight analysis of reflected light incident on a photo-receiver array; a light path switching component configured to cause the illumination component to redirect the light beam in another direction from the illumination component to a calibration light path in response to initiation of a calibration sequence, the calibration light path directing the redirected light to the photo-receiver array over a specified distance; a receiving lens element configured to receive the reflected light and to direct the reflected light to the photo-receiver array; and a calibration component configured to calibrate the first distance determination component based on a difference between the specified distance and a distance value calculated for the redirected light received through the calibration light path at the photo-receiver array, wherein the light path switching component is configured to redirect the light beam from the illumination component to a calibration light path by redirecting the light beam from the illumination component to a surface of a housing of the TOF sensor device, wherein the redirecting of the light beam to the surface of the housing causes parasitic reflections to fall back to the receiving lens element, which directs the reflected light to the photo-receiver array, and wherein the specified distance comprises a length of the light path from the illumination component to the photo-receiver array via the surface of the housing.