A concept of imaging by dust rays instead of light rays has been developed, based on an existing dust velocity vector analyser. The dust ray image of an object that emits dust particles, such as a cometary nucleus, would be a map of the dust activity of the object's surface. The dust ray camera operates on the electrical charge carried by the dust particles. It measures times of flight of each particle between a series of grids arranged parallel to three differently inclined planes. From the times of flight the velocity and the trajectory angles as well as the position of entry at the aperture are calculated. The mass of a dust particle is determined from the deflection of its trajectory in an electrical field. Under certain circumstances, dust sources can be imaged in all three dimensions, due to the spread of particle velocities. Since a dust ray camera does not mechanically touch most dust particles, subsequent optical and/or chemical analyses are possible.